aboutsummaryrefslogtreecommitdiffstats
path: root/src/dma/vendor/github.com/go-redis/redis
diff options
context:
space:
mode:
Diffstat (limited to 'src/dma/vendor/github.com/go-redis/redis')
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/.gitignore2
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/.travis.yml20
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/CHANGELOG.md12
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/LICENSE25
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/Makefile20
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/README.md146
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/cluster.go1624
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/cluster_commands.go22
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/command.go1225
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/commands.go2337
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/doc.go4
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/consistenthash/consistenthash.go81
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/error.go83
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/hashtag/hashtag.go77
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/internal.go24
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/log.go15
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/once.go60
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/pool/conn.go80
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/pool/pool.go416
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/pool/pool_single.go53
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/pool/pool_sticky.go109
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/proto/reader.go316
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/proto/scan.go166
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/proto/write_buffer.go113
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/singleflight/singleflight.go64
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/util.go29
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/util/safe.go7
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/util/strconv.go19
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/internal/util/unsafe.go12
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/iterator.go73
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/options.go203
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/parser.go394
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/pipeline.go113
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/pubsub.go460
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/redis.go501
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/result.go140
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/ring.go622
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/script.go62
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/sentinel.go343
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/tx.go110
-rw-r--r--src/dma/vendor/github.com/go-redis/redis/universal.go151
41 files changed, 10333 insertions, 0 deletions
diff --git a/src/dma/vendor/github.com/go-redis/redis/.gitignore b/src/dma/vendor/github.com/go-redis/redis/.gitignore
new file mode 100644
index 00000000..ebfe903b
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/.gitignore
@@ -0,0 +1,2 @@
+*.rdb
+testdata/*/
diff --git a/src/dma/vendor/github.com/go-redis/redis/.travis.yml b/src/dma/vendor/github.com/go-redis/redis/.travis.yml
new file mode 100644
index 00000000..39ffc2be
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/.travis.yml
@@ -0,0 +1,20 @@
+sudo: false
+language: go
+
+services:
+ - redis-server
+
+go:
+ - 1.7.x
+ - 1.8.x
+ - 1.9.x
+ - 1.10.x
+ - tip
+
+matrix:
+ allow_failures:
+ - go: tip
+
+install:
+ - go get github.com/onsi/ginkgo
+ - go get github.com/onsi/gomega
diff --git a/src/dma/vendor/github.com/go-redis/redis/CHANGELOG.md b/src/dma/vendor/github.com/go-redis/redis/CHANGELOG.md
new file mode 100644
index 00000000..cb0e1b8e
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/CHANGELOG.md
@@ -0,0 +1,12 @@
+# Changelog
+
+## v6.13
+
+- Ring got new options called `HashReplicas` and `Hash`. It is recommended to set `HashReplicas = 1000` for better keys distribution between shards.
+- Cluster client was optimized to use much less memory when reloading cluster state.
+- PubSub.ReceiveMessage is re-worked to not use ReceiveTimeout so it does not lose data when timeout occurres. In most cases it is recommended to use PubSub.Channel instead.
+- Dialer.KeepAlive is set to 5 minutes by default.
+
+## v6.12
+
+- ClusterClient got new option called `ClusterSlots` which allows to build cluster of normal Redis Servers that don't have cluster mode enabled. See https://godoc.org/github.com/go-redis/redis#example-NewClusterClient--ManualSetup
diff --git a/src/dma/vendor/github.com/go-redis/redis/LICENSE b/src/dma/vendor/github.com/go-redis/redis/LICENSE
new file mode 100644
index 00000000..298bed9b
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/LICENSE
@@ -0,0 +1,25 @@
+Copyright (c) 2013 The github.com/go-redis/redis Authors.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+ * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/src/dma/vendor/github.com/go-redis/redis/Makefile b/src/dma/vendor/github.com/go-redis/redis/Makefile
new file mode 100644
index 00000000..1fbdac91
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/Makefile
@@ -0,0 +1,20 @@
+all: testdeps
+ go test ./...
+ go test ./... -short -race
+ env GOOS=linux GOARCH=386 go test ./...
+ go vet
+
+testdeps: testdata/redis/src/redis-server
+
+bench: testdeps
+ go test ./... -test.run=NONE -test.bench=. -test.benchmem
+
+.PHONY: all test testdeps bench
+
+testdata/redis:
+ mkdir -p $@
+ wget -qO- https://github.com/antirez/redis/archive/unstable.tar.gz | tar xvz --strip-components=1 -C $@
+
+testdata/redis/src/redis-server: testdata/redis
+ sed -i.bak 's/libjemalloc.a/libjemalloc.a -lrt/g' $</src/Makefile
+ cd $< && make all
diff --git a/src/dma/vendor/github.com/go-redis/redis/README.md b/src/dma/vendor/github.com/go-redis/redis/README.md
new file mode 100644
index 00000000..7d05b446
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/README.md
@@ -0,0 +1,146 @@
+# Redis client for Golang
+
+[![Build Status](https://travis-ci.org/go-redis/redis.png?branch=master)](https://travis-ci.org/go-redis/redis)
+[![GoDoc](https://godoc.org/github.com/go-redis/redis?status.svg)](https://godoc.org/github.com/go-redis/redis)
+[![Airbrake](https://img.shields.io/badge/kudos-airbrake.io-orange.svg)](https://airbrake.io)
+
+Supports:
+
+- Redis 3 commands except QUIT, MONITOR, SLOWLOG and SYNC.
+- Automatic connection pooling with [circuit breaker](https://en.wikipedia.org/wiki/Circuit_breaker_design_pattern) support.
+- [Pub/Sub](https://godoc.org/github.com/go-redis/redis#PubSub).
+- [Transactions](https://godoc.org/github.com/go-redis/redis#Multi).
+- [Pipeline](https://godoc.org/github.com/go-redis/redis#example-Client-Pipeline) and [TxPipeline](https://godoc.org/github.com/go-redis/redis#example-Client-TxPipeline).
+- [Scripting](https://godoc.org/github.com/go-redis/redis#Script).
+- [Timeouts](https://godoc.org/github.com/go-redis/redis#Options).
+- [Redis Sentinel](https://godoc.org/github.com/go-redis/redis#NewFailoverClient).
+- [Redis Cluster](https://godoc.org/github.com/go-redis/redis#NewClusterClient).
+- [Cluster of Redis Servers](https://godoc.org/github.com/go-redis/redis#example-NewClusterClient--ManualSetup) without using cluster mode and Redis Sentinel.
+- [Ring](https://godoc.org/github.com/go-redis/redis#NewRing).
+- [Instrumentation](https://godoc.org/github.com/go-redis/redis#ex-package--Instrumentation).
+- [Cache friendly](https://github.com/go-redis/cache).
+- [Rate limiting](https://github.com/go-redis/redis_rate).
+- [Distributed Locks](https://github.com/bsm/redis-lock).
+
+API docs: https://godoc.org/github.com/go-redis/redis.
+Examples: https://godoc.org/github.com/go-redis/redis#pkg-examples.
+
+## Installation
+
+Install:
+
+```shell
+go get -u github.com/go-redis/redis
+```
+
+Import:
+
+```go
+import "github.com/go-redis/redis"
+```
+
+## Quickstart
+
+```go
+func ExampleNewClient() {
+ client := redis.NewClient(&redis.Options{
+ Addr: "localhost:6379",
+ Password: "", // no password set
+ DB: 0, // use default DB
+ })
+
+ pong, err := client.Ping().Result()
+ fmt.Println(pong, err)
+ // Output: PONG <nil>
+}
+
+func ExampleClient() {
+ err := client.Set("key", "value", 0).Err()
+ if err != nil {
+ panic(err)
+ }
+
+ val, err := client.Get("key").Result()
+ if err != nil {
+ panic(err)
+ }
+ fmt.Println("key", val)
+
+ val2, err := client.Get("key2").Result()
+ if err == redis.Nil {
+ fmt.Println("key2 does not exist")
+ } else if err != nil {
+ panic(err)
+ } else {
+ fmt.Println("key2", val2)
+ }
+ // Output: key value
+ // key2 does not exist
+}
+```
+
+## Howto
+
+Please go through [examples](https://godoc.org/github.com/go-redis/redis#pkg-examples) to get an idea how to use this package.
+
+## Look and feel
+
+Some corner cases:
+
+```go
+// SET key value EX 10 NX
+set, err := client.SetNX("key", "value", 10*time.Second).Result()
+
+// SORT list LIMIT 0 2 ASC
+vals, err := client.Sort("list", redis.Sort{Offset: 0, Count: 2, Order: "ASC"}).Result()
+
+// ZRANGEBYSCORE zset -inf +inf WITHSCORES LIMIT 0 2
+vals, err := client.ZRangeByScoreWithScores("zset", redis.ZRangeBy{
+ Min: "-inf",
+ Max: "+inf",
+ Offset: 0,
+ Count: 2,
+}).Result()
+
+// ZINTERSTORE out 2 zset1 zset2 WEIGHTS 2 3 AGGREGATE SUM
+vals, err := client.ZInterStore("out", redis.ZStore{Weights: []int64{2, 3}}, "zset1", "zset2").Result()
+
+// EVAL "return {KEYS[1],ARGV[1]}" 1 "key" "hello"
+vals, err := client.Eval("return {KEYS[1],ARGV[1]}", []string{"key"}, "hello").Result()
+```
+
+## Benchmark
+
+go-redis vs redigo:
+
+```
+BenchmarkSetGoRedis10Conns64Bytes-4 200000 7621 ns/op 210 B/op 6 allocs/op
+BenchmarkSetGoRedis100Conns64Bytes-4 200000 7554 ns/op 210 B/op 6 allocs/op
+BenchmarkSetGoRedis10Conns1KB-4 200000 7697 ns/op 210 B/op 6 allocs/op
+BenchmarkSetGoRedis100Conns1KB-4 200000 7688 ns/op 210 B/op 6 allocs/op
+BenchmarkSetGoRedis10Conns10KB-4 200000 9214 ns/op 210 B/op 6 allocs/op
+BenchmarkSetGoRedis100Conns10KB-4 200000 9181 ns/op 210 B/op 6 allocs/op
+BenchmarkSetGoRedis10Conns1MB-4 2000 583242 ns/op 2337 B/op 6 allocs/op
+BenchmarkSetGoRedis100Conns1MB-4 2000 583089 ns/op 2338 B/op 6 allocs/op
+BenchmarkSetRedigo10Conns64Bytes-4 200000 7576 ns/op 208 B/op 7 allocs/op
+BenchmarkSetRedigo100Conns64Bytes-4 200000 7782 ns/op 208 B/op 7 allocs/op
+BenchmarkSetRedigo10Conns1KB-4 200000 7958 ns/op 208 B/op 7 allocs/op
+BenchmarkSetRedigo100Conns1KB-4 200000 7725 ns/op 208 B/op 7 allocs/op
+BenchmarkSetRedigo10Conns10KB-4 100000 18442 ns/op 208 B/op 7 allocs/op
+BenchmarkSetRedigo100Conns10KB-4 100000 18818 ns/op 208 B/op 7 allocs/op
+BenchmarkSetRedigo10Conns1MB-4 2000 668829 ns/op 226 B/op 7 allocs/op
+BenchmarkSetRedigo100Conns1MB-4 2000 679542 ns/op 226 B/op 7 allocs/op
+```
+
+Redis Cluster:
+
+```
+BenchmarkRedisPing-4 200000 6983 ns/op 116 B/op 4 allocs/op
+BenchmarkRedisClusterPing-4 100000 11535 ns/op 117 B/op 4 allocs/op
+```
+
+## See also
+
+- [Golang PostgreSQL ORM](https://github.com/go-pg/pg)
+- [Golang msgpack](https://github.com/vmihailenco/msgpack)
+- [Golang message task queue](https://github.com/go-msgqueue/msgqueue)
diff --git a/src/dma/vendor/github.com/go-redis/redis/cluster.go b/src/dma/vendor/github.com/go-redis/redis/cluster.go
new file mode 100644
index 00000000..7a1af143
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/cluster.go
@@ -0,0 +1,1624 @@
+package redis
+
+import (
+ "context"
+ "crypto/tls"
+ "errors"
+ "fmt"
+ "math"
+ "math/rand"
+ "net"
+ "sort"
+ "sync"
+ "sync/atomic"
+ "time"
+
+ "github.com/go-redis/redis/internal"
+ "github.com/go-redis/redis/internal/hashtag"
+ "github.com/go-redis/redis/internal/pool"
+ "github.com/go-redis/redis/internal/proto"
+ "github.com/go-redis/redis/internal/singleflight"
+)
+
+var errClusterNoNodes = fmt.Errorf("redis: cluster has no nodes")
+
+// ClusterOptions are used to configure a cluster client and should be
+// passed to NewClusterClient.
+type ClusterOptions struct {
+ // A seed list of host:port addresses of cluster nodes.
+ Addrs []string
+
+ // The maximum number of retries before giving up. Command is retried
+ // on network errors and MOVED/ASK redirects.
+ // Default is 8 retries.
+ MaxRedirects int
+
+ // Enables read-only commands on slave nodes.
+ ReadOnly bool
+ // Allows routing read-only commands to the closest master or slave node.
+ // It automatically enables ReadOnly.
+ RouteByLatency bool
+ // Allows routing read-only commands to the random master or slave node.
+ // It automatically enables ReadOnly.
+ RouteRandomly bool
+
+ // Optional function that returns cluster slots information.
+ // It is useful to manually create cluster of standalone Redis servers
+ // and load-balance read/write operations between master and slaves.
+ // It can use service like ZooKeeper to maintain configuration information
+ // and Cluster.ReloadState to manually trigger state reloading.
+ ClusterSlots func() ([]ClusterSlot, error)
+
+ // Following options are copied from Options struct.
+
+ OnConnect func(*Conn) error
+
+ MaxRetries int
+ MinRetryBackoff time.Duration
+ MaxRetryBackoff time.Duration
+ Password string
+
+ DialTimeout time.Duration
+ ReadTimeout time.Duration
+ WriteTimeout time.Duration
+
+ // PoolSize applies per cluster node and not for the whole cluster.
+ PoolSize int
+ PoolTimeout time.Duration
+ IdleTimeout time.Duration
+ IdleCheckFrequency time.Duration
+
+ TLSConfig *tls.Config
+}
+
+func (opt *ClusterOptions) init() {
+ if opt.MaxRedirects == -1 {
+ opt.MaxRedirects = 0
+ } else if opt.MaxRedirects == 0 {
+ opt.MaxRedirects = 8
+ }
+
+ if opt.RouteByLatency || opt.RouteRandomly {
+ opt.ReadOnly = true
+ }
+
+ switch opt.ReadTimeout {
+ case -1:
+ opt.ReadTimeout = 0
+ case 0:
+ opt.ReadTimeout = 3 * time.Second
+ }
+ switch opt.WriteTimeout {
+ case -1:
+ opt.WriteTimeout = 0
+ case 0:
+ opt.WriteTimeout = opt.ReadTimeout
+ }
+
+ switch opt.MinRetryBackoff {
+ case -1:
+ opt.MinRetryBackoff = 0
+ case 0:
+ opt.MinRetryBackoff = 8 * time.Millisecond
+ }
+ switch opt.MaxRetryBackoff {
+ case -1:
+ opt.MaxRetryBackoff = 0
+ case 0:
+ opt.MaxRetryBackoff = 512 * time.Millisecond
+ }
+}
+
+func (opt *ClusterOptions) clientOptions() *Options {
+ const disableIdleCheck = -1
+
+ return &Options{
+ OnConnect: opt.OnConnect,
+
+ MaxRetries: opt.MaxRetries,
+ MinRetryBackoff: opt.MinRetryBackoff,
+ MaxRetryBackoff: opt.MaxRetryBackoff,
+ Password: opt.Password,
+ readOnly: opt.ReadOnly,
+
+ DialTimeout: opt.DialTimeout,
+ ReadTimeout: opt.ReadTimeout,
+ WriteTimeout: opt.WriteTimeout,
+
+ PoolSize: opt.PoolSize,
+ PoolTimeout: opt.PoolTimeout,
+ IdleTimeout: opt.IdleTimeout,
+
+ IdleCheckFrequency: disableIdleCheck,
+
+ TLSConfig: opt.TLSConfig,
+ }
+}
+
+//------------------------------------------------------------------------------
+
+type clusterNode struct {
+ Client *Client
+
+ latency uint32 // atomic
+ generation uint32 // atomic
+ loading uint32 // atomic
+}
+
+func newClusterNode(clOpt *ClusterOptions, addr string) *clusterNode {
+ opt := clOpt.clientOptions()
+ opt.Addr = addr
+ node := clusterNode{
+ Client: NewClient(opt),
+ }
+
+ node.latency = math.MaxUint32
+ if clOpt.RouteByLatency {
+ go node.updateLatency()
+ }
+
+ return &node
+}
+
+func (n *clusterNode) String() string {
+ return n.Client.String()
+}
+
+func (n *clusterNode) Close() error {
+ return n.Client.Close()
+}
+
+func (n *clusterNode) updateLatency() {
+ const probes = 10
+
+ var latency uint32
+ for i := 0; i < probes; i++ {
+ start := time.Now()
+ n.Client.Ping()
+ probe := uint32(time.Since(start) / time.Microsecond)
+ latency = (latency + probe) / 2
+ }
+ atomic.StoreUint32(&n.latency, latency)
+}
+
+func (n *clusterNode) Latency() time.Duration {
+ latency := atomic.LoadUint32(&n.latency)
+ return time.Duration(latency) * time.Microsecond
+}
+
+func (n *clusterNode) MarkAsLoading() {
+ atomic.StoreUint32(&n.loading, uint32(time.Now().Unix()))
+}
+
+func (n *clusterNode) Loading() bool {
+ const minute = int64(time.Minute / time.Second)
+
+ loading := atomic.LoadUint32(&n.loading)
+ if loading == 0 {
+ return false
+ }
+ if time.Now().Unix()-int64(loading) < minute {
+ return true
+ }
+ atomic.StoreUint32(&n.loading, 0)
+ return false
+}
+
+func (n *clusterNode) Generation() uint32 {
+ return atomic.LoadUint32(&n.generation)
+}
+
+func (n *clusterNode) SetGeneration(gen uint32) {
+ for {
+ v := atomic.LoadUint32(&n.generation)
+ if gen < v || atomic.CompareAndSwapUint32(&n.generation, v, gen) {
+ break
+ }
+ }
+}
+
+//------------------------------------------------------------------------------
+
+type clusterNodes struct {
+ opt *ClusterOptions
+
+ mu sync.RWMutex
+ allAddrs []string
+ allNodes map[string]*clusterNode
+ clusterAddrs []string
+ closed bool
+
+ nodeCreateGroup singleflight.Group
+
+ _generation uint32 // atomic
+}
+
+func newClusterNodes(opt *ClusterOptions) *clusterNodes {
+ return &clusterNodes{
+ opt: opt,
+
+ allAddrs: opt.Addrs,
+ allNodes: make(map[string]*clusterNode),
+ }
+}
+
+func (c *clusterNodes) Close() error {
+ c.mu.Lock()
+ defer c.mu.Unlock()
+
+ if c.closed {
+ return nil
+ }
+ c.closed = true
+
+ var firstErr error
+ for _, node := range c.allNodes {
+ if err := node.Client.Close(); err != nil && firstErr == nil {
+ firstErr = err
+ }
+ }
+
+ c.allNodes = nil
+ c.clusterAddrs = nil
+
+ return firstErr
+}
+
+func (c *clusterNodes) Addrs() ([]string, error) {
+ var addrs []string
+ c.mu.RLock()
+ closed := c.closed
+ if !closed {
+ if len(c.clusterAddrs) > 0 {
+ addrs = c.clusterAddrs
+ } else {
+ addrs = c.allAddrs
+ }
+ }
+ c.mu.RUnlock()
+
+ if closed {
+ return nil, pool.ErrClosed
+ }
+ if len(addrs) == 0 {
+ return nil, errClusterNoNodes
+ }
+ return addrs, nil
+}
+
+func (c *clusterNodes) NextGeneration() uint32 {
+ return atomic.AddUint32(&c._generation, 1)
+}
+
+// GC removes unused nodes.
+func (c *clusterNodes) GC(generation uint32) {
+ var collected []*clusterNode
+ c.mu.Lock()
+ for addr, node := range c.allNodes {
+ if node.Generation() >= generation {
+ continue
+ }
+
+ c.clusterAddrs = remove(c.clusterAddrs, addr)
+ delete(c.allNodes, addr)
+ collected = append(collected, node)
+ }
+ c.mu.Unlock()
+
+ for _, node := range collected {
+ _ = node.Client.Close()
+ }
+}
+
+func (c *clusterNodes) Get(addr string) (*clusterNode, error) {
+ var node *clusterNode
+ var err error
+ c.mu.RLock()
+ if c.closed {
+ err = pool.ErrClosed
+ } else {
+ node = c.allNodes[addr]
+ }
+ c.mu.RUnlock()
+ return node, err
+}
+
+func (c *clusterNodes) GetOrCreate(addr string) (*clusterNode, error) {
+ node, err := c.Get(addr)
+ if err != nil {
+ return nil, err
+ }
+ if node != nil {
+ return node, nil
+ }
+
+ v, err := c.nodeCreateGroup.Do(addr, func() (interface{}, error) {
+ node := newClusterNode(c.opt, addr)
+ return node, nil
+ })
+
+ c.mu.Lock()
+ defer c.mu.Unlock()
+
+ if c.closed {
+ return nil, pool.ErrClosed
+ }
+
+ node, ok := c.allNodes[addr]
+ if ok {
+ _ = v.(*clusterNode).Close()
+ return node, err
+ }
+ node = v.(*clusterNode)
+
+ c.allAddrs = appendIfNotExists(c.allAddrs, addr)
+ if err == nil {
+ c.clusterAddrs = append(c.clusterAddrs, addr)
+ }
+ c.allNodes[addr] = node
+
+ return node, err
+}
+
+func (c *clusterNodes) All() ([]*clusterNode, error) {
+ c.mu.RLock()
+ defer c.mu.RUnlock()
+
+ if c.closed {
+ return nil, pool.ErrClosed
+ }
+
+ cp := make([]*clusterNode, 0, len(c.allNodes))
+ for _, node := range c.allNodes {
+ cp = append(cp, node)
+ }
+ return cp, nil
+}
+
+func (c *clusterNodes) Random() (*clusterNode, error) {
+ addrs, err := c.Addrs()
+ if err != nil {
+ return nil, err
+ }
+
+ n := rand.Intn(len(addrs))
+ return c.GetOrCreate(addrs[n])
+}
+
+//------------------------------------------------------------------------------
+
+type clusterSlot struct {
+ start, end int
+ nodes []*clusterNode
+}
+
+type clusterSlotSlice []*clusterSlot
+
+func (p clusterSlotSlice) Len() int {
+ return len(p)
+}
+
+func (p clusterSlotSlice) Less(i, j int) bool {
+ return p[i].start < p[j].start
+}
+
+func (p clusterSlotSlice) Swap(i, j int) {
+ p[i], p[j] = p[j], p[i]
+}
+
+type clusterState struct {
+ nodes *clusterNodes
+ Masters []*clusterNode
+ Slaves []*clusterNode
+
+ slots []*clusterSlot
+
+ generation uint32
+ createdAt time.Time
+}
+
+func newClusterState(
+ nodes *clusterNodes, slots []ClusterSlot, origin string,
+) (*clusterState, error) {
+ c := clusterState{
+ nodes: nodes,
+
+ slots: make([]*clusterSlot, 0, len(slots)),
+
+ generation: nodes.NextGeneration(),
+ createdAt: time.Now(),
+ }
+
+ isLoopbackOrigin := isLoopbackAddr(origin)
+ for _, slot := range slots {
+ var nodes []*clusterNode
+ for i, slotNode := range slot.Nodes {
+ addr := slotNode.Addr
+ if !isLoopbackOrigin && useOriginAddr(origin, addr) {
+ addr = origin
+ }
+
+ node, err := c.nodes.GetOrCreate(addr)
+ if err != nil {
+ return nil, err
+ }
+
+ node.SetGeneration(c.generation)
+ nodes = append(nodes, node)
+
+ if i == 0 {
+ c.Masters = appendUniqueNode(c.Masters, node)
+ } else {
+ c.Slaves = appendUniqueNode(c.Slaves, node)
+ }
+ }
+
+ c.slots = append(c.slots, &clusterSlot{
+ start: slot.Start,
+ end: slot.End,
+ nodes: nodes,
+ })
+ }
+
+ sort.Sort(clusterSlotSlice(c.slots))
+
+ time.AfterFunc(time.Minute, func() {
+ nodes.GC(c.generation)
+ })
+
+ return &c, nil
+}
+
+func (c *clusterState) slotMasterNode(slot int) (*clusterNode, error) {
+ nodes := c.slotNodes(slot)
+ if len(nodes) > 0 {
+ return nodes[0], nil
+ }
+ return c.nodes.Random()
+}
+
+func (c *clusterState) slotSlaveNode(slot int) (*clusterNode, error) {
+ nodes := c.slotNodes(slot)
+ switch len(nodes) {
+ case 0:
+ return c.nodes.Random()
+ case 1:
+ return nodes[0], nil
+ case 2:
+ if slave := nodes[1]; !slave.Loading() {
+ return slave, nil
+ }
+ return nodes[0], nil
+ default:
+ var slave *clusterNode
+ for i := 0; i < 10; i++ {
+ n := rand.Intn(len(nodes)-1) + 1
+ slave = nodes[n]
+ if !slave.Loading() {
+ break
+ }
+ }
+ return slave, nil
+ }
+}
+
+func (c *clusterState) slotClosestNode(slot int) (*clusterNode, error) {
+ const threshold = time.Millisecond
+
+ nodes := c.slotNodes(slot)
+ if len(nodes) == 0 {
+ return c.nodes.Random()
+ }
+
+ var node *clusterNode
+ for _, n := range nodes {
+ if n.Loading() {
+ continue
+ }
+ if node == nil || node.Latency()-n.Latency() > threshold {
+ node = n
+ }
+ }
+ return node, nil
+}
+
+func (c *clusterState) slotRandomNode(slot int) *clusterNode {
+ nodes := c.slotNodes(slot)
+ n := rand.Intn(len(nodes))
+ return nodes[n]
+}
+
+func (c *clusterState) slotNodes(slot int) []*clusterNode {
+ i := sort.Search(len(c.slots), func(i int) bool {
+ return c.slots[i].end >= slot
+ })
+ if i >= len(c.slots) {
+ return nil
+ }
+ x := c.slots[i]
+ if slot >= x.start && slot <= x.end {
+ return x.nodes
+ }
+ return nil
+}
+
+func (c *clusterState) IsConsistent() bool {
+ if c.nodes.opt.ClusterSlots != nil {
+ return true
+ }
+ return len(c.Masters) <= len(c.Slaves)
+}
+
+//------------------------------------------------------------------------------
+
+type clusterStateHolder struct {
+ load func() (*clusterState, error)
+
+ state atomic.Value
+
+ firstErrMu sync.RWMutex
+ firstErr error
+
+ reloading uint32 // atomic
+}
+
+func newClusterStateHolder(fn func() (*clusterState, error)) *clusterStateHolder {
+ return &clusterStateHolder{
+ load: fn,
+ }
+}
+
+func (c *clusterStateHolder) Reload() (*clusterState, error) {
+ state, err := c.reload()
+ if err != nil {
+ return nil, err
+ }
+ if !state.IsConsistent() {
+ time.AfterFunc(time.Second, c.LazyReload)
+ }
+ return state, nil
+}
+
+func (c *clusterStateHolder) reload() (*clusterState, error) {
+ state, err := c.load()
+ if err != nil {
+ c.firstErrMu.Lock()
+ if c.firstErr == nil {
+ c.firstErr = err
+ }
+ c.firstErrMu.Unlock()
+ return nil, err
+ }
+ c.state.Store(state)
+ return state, nil
+}
+
+func (c *clusterStateHolder) LazyReload() {
+ if !atomic.CompareAndSwapUint32(&c.reloading, 0, 1) {
+ return
+ }
+ go func() {
+ defer atomic.StoreUint32(&c.reloading, 0)
+
+ for {
+ state, err := c.reload()
+ if err != nil {
+ return
+ }
+ time.Sleep(100 * time.Millisecond)
+ if state.IsConsistent() {
+ return
+ }
+ }
+ }()
+}
+
+func (c *clusterStateHolder) Get() (*clusterState, error) {
+ v := c.state.Load()
+ if v != nil {
+ state := v.(*clusterState)
+ if time.Since(state.createdAt) > time.Minute {
+ c.LazyReload()
+ }
+ return state, nil
+ }
+
+ c.firstErrMu.RLock()
+ err := c.firstErr
+ c.firstErrMu.RUnlock()
+ if err != nil {
+ return nil, err
+ }
+
+ return nil, errors.New("redis: cluster has no state")
+}
+
+func (c *clusterStateHolder) ReloadOrGet() (*clusterState, error) {
+ state, err := c.Reload()
+ if err == nil {
+ return state, nil
+ }
+ return c.Get()
+}
+
+//------------------------------------------------------------------------------
+
+// ClusterClient is a Redis Cluster client representing a pool of zero
+// or more underlying connections. It's safe for concurrent use by
+// multiple goroutines.
+type ClusterClient struct {
+ cmdable
+
+ ctx context.Context
+
+ opt *ClusterOptions
+ nodes *clusterNodes
+ state *clusterStateHolder
+ cmdsInfoCache *cmdsInfoCache
+
+ process func(Cmder) error
+ processPipeline func([]Cmder) error
+ processTxPipeline func([]Cmder) error
+}
+
+// NewClusterClient returns a Redis Cluster client as described in
+// http://redis.io/topics/cluster-spec.
+func NewClusterClient(opt *ClusterOptions) *ClusterClient {
+ opt.init()
+
+ c := &ClusterClient{
+ opt: opt,
+ nodes: newClusterNodes(opt),
+ }
+ c.state = newClusterStateHolder(c.loadState)
+ c.cmdsInfoCache = newCmdsInfoCache(c.cmdsInfo)
+
+ c.process = c.defaultProcess
+ c.processPipeline = c.defaultProcessPipeline
+ c.processTxPipeline = c.defaultProcessTxPipeline
+
+ c.init()
+
+ _, _ = c.state.Reload()
+ _, _ = c.cmdsInfoCache.Get()
+
+ if opt.IdleCheckFrequency > 0 {
+ go c.reaper(opt.IdleCheckFrequency)
+ }
+
+ return c
+}
+
+// ReloadState reloads cluster state. It calls ClusterSlots func
+// to get cluster slots information.
+func (c *ClusterClient) ReloadState() error {
+ _, err := c.state.Reload()
+ return err
+}
+
+func (c *ClusterClient) init() {
+ c.cmdable.setProcessor(c.Process)
+}
+
+func (c *ClusterClient) Context() context.Context {
+ if c.ctx != nil {
+ return c.ctx
+ }
+ return context.Background()
+}
+
+func (c *ClusterClient) WithContext(ctx context.Context) *ClusterClient {
+ if ctx == nil {
+ panic("nil context")
+ }
+ c2 := c.copy()
+ c2.ctx = ctx
+ return c2
+}
+
+func (c *ClusterClient) copy() *ClusterClient {
+ cp := *c
+ cp.init()
+ return &cp
+}
+
+// Options returns read-only Options that were used to create the client.
+func (c *ClusterClient) Options() *ClusterOptions {
+ return c.opt
+}
+
+func (c *ClusterClient) retryBackoff(attempt int) time.Duration {
+ return internal.RetryBackoff(attempt, c.opt.MinRetryBackoff, c.opt.MaxRetryBackoff)
+}
+
+func (c *ClusterClient) cmdsInfo() (map[string]*CommandInfo, error) {
+ addrs, err := c.nodes.Addrs()
+ if err != nil {
+ return nil, err
+ }
+
+ var firstErr error
+ for _, addr := range addrs {
+ node, err := c.nodes.Get(addr)
+ if err != nil {
+ return nil, err
+ }
+ if node == nil {
+ continue
+ }
+
+ info, err := node.Client.Command().Result()
+ if err == nil {
+ return info, nil
+ }
+ if firstErr == nil {
+ firstErr = err
+ }
+ }
+ return nil, firstErr
+}
+
+func (c *ClusterClient) cmdInfo(name string) *CommandInfo {
+ cmdsInfo, err := c.cmdsInfoCache.Get()
+ if err != nil {
+ return nil
+ }
+
+ info := cmdsInfo[name]
+ if info == nil {
+ internal.Logf("info for cmd=%s not found", name)
+ }
+ return info
+}
+
+func cmdSlot(cmd Cmder, pos int) int {
+ if pos == 0 {
+ return hashtag.RandomSlot()
+ }
+ firstKey := cmd.stringArg(pos)
+ return hashtag.Slot(firstKey)
+}
+
+func (c *ClusterClient) cmdSlot(cmd Cmder) int {
+ cmdInfo := c.cmdInfo(cmd.Name())
+ return cmdSlot(cmd, cmdFirstKeyPos(cmd, cmdInfo))
+}
+
+func (c *ClusterClient) cmdSlotAndNode(cmd Cmder) (int, *clusterNode, error) {
+ state, err := c.state.Get()
+ if err != nil {
+ return 0, nil, err
+ }
+
+ cmdInfo := c.cmdInfo(cmd.Name())
+ slot := cmdSlot(cmd, cmdFirstKeyPos(cmd, cmdInfo))
+
+ if cmdInfo != nil && cmdInfo.ReadOnly && c.opt.ReadOnly {
+ if c.opt.RouteByLatency {
+ node, err := state.slotClosestNode(slot)
+ return slot, node, err
+ }
+
+ if c.opt.RouteRandomly {
+ node := state.slotRandomNode(slot)
+ return slot, node, nil
+ }
+
+ node, err := state.slotSlaveNode(slot)
+ return slot, node, err
+ }
+
+ node, err := state.slotMasterNode(slot)
+ return slot, node, err
+}
+
+func (c *ClusterClient) slotMasterNode(slot int) (*clusterNode, error) {
+ state, err := c.state.Get()
+ if err != nil {
+ return nil, err
+ }
+
+ nodes := state.slotNodes(slot)
+ if len(nodes) > 0 {
+ return nodes[0], nil
+ }
+ return c.nodes.Random()
+}
+
+func (c *ClusterClient) Watch(fn func(*Tx) error, keys ...string) error {
+ if len(keys) == 0 {
+ return fmt.Errorf("redis: Watch requires at least one key")
+ }
+
+ slot := hashtag.Slot(keys[0])
+ for _, key := range keys[1:] {
+ if hashtag.Slot(key) != slot {
+ err := fmt.Errorf("redis: Watch requires all keys to be in the same slot")
+ return err
+ }
+ }
+
+ node, err := c.slotMasterNode(slot)
+ if err != nil {
+ return err
+ }
+
+ for attempt := 0; attempt <= c.opt.MaxRedirects; attempt++ {
+ if attempt > 0 {
+ time.Sleep(c.retryBackoff(attempt))
+ }
+
+ err = node.Client.Watch(fn, keys...)
+ if err == nil {
+ break
+ }
+
+ if internal.IsRetryableError(err, true) {
+ c.state.LazyReload()
+ continue
+ }
+
+ moved, ask, addr := internal.IsMovedError(err)
+ if moved || ask {
+ c.state.LazyReload()
+ node, err = c.nodes.GetOrCreate(addr)
+ if err != nil {
+ return err
+ }
+ continue
+ }
+
+ if err == pool.ErrClosed {
+ node, err = c.slotMasterNode(slot)
+ if err != nil {
+ return err
+ }
+ continue
+ }
+
+ return err
+ }
+
+ return err
+}
+
+// Close closes the cluster client, releasing any open resources.
+//
+// It is rare to Close a ClusterClient, as the ClusterClient is meant
+// to be long-lived and shared between many goroutines.
+func (c *ClusterClient) Close() error {
+ return c.nodes.Close()
+}
+
+func (c *ClusterClient) WrapProcess(
+ fn func(oldProcess func(Cmder) error) func(Cmder) error,
+) {
+ c.process = fn(c.process)
+}
+
+func (c *ClusterClient) Process(cmd Cmder) error {
+ return c.process(cmd)
+}
+
+func (c *ClusterClient) defaultProcess(cmd Cmder) error {
+ var node *clusterNode
+ var ask bool
+ for attempt := 0; attempt <= c.opt.MaxRedirects; attempt++ {
+ if attempt > 0 {
+ time.Sleep(c.retryBackoff(attempt))
+ }
+
+ if node == nil {
+ var err error
+ _, node, err = c.cmdSlotAndNode(cmd)
+ if err != nil {
+ cmd.setErr(err)
+ break
+ }
+ }
+
+ var err error
+ if ask {
+ pipe := node.Client.Pipeline()
+ _ = pipe.Process(NewCmd("ASKING"))
+ _ = pipe.Process(cmd)
+ _, err = pipe.Exec()
+ _ = pipe.Close()
+ ask = false
+ } else {
+ err = node.Client.Process(cmd)
+ }
+
+ // If there is no error - we are done.
+ if err == nil {
+ break
+ }
+
+ // If slave is loading - read from master.
+ if c.opt.ReadOnly && internal.IsLoadingError(err) {
+ node.MarkAsLoading()
+ continue
+ }
+
+ if internal.IsRetryableError(err, true) {
+ c.state.LazyReload()
+
+ // First retry the same node.
+ if attempt == 0 {
+ continue
+ }
+
+ // Second try random node.
+ node, err = c.nodes.Random()
+ if err != nil {
+ break
+ }
+ continue
+ }
+
+ var moved bool
+ var addr string
+ moved, ask, addr = internal.IsMovedError(err)
+ if moved || ask {
+ c.state.LazyReload()
+
+ node, err = c.nodes.GetOrCreate(addr)
+ if err != nil {
+ break
+ }
+ continue
+ }
+
+ if err == pool.ErrClosed {
+ node = nil
+ continue
+ }
+
+ break
+ }
+
+ return cmd.Err()
+}
+
+// ForEachMaster concurrently calls the fn on each master node in the cluster.
+// It returns the first error if any.
+func (c *ClusterClient) ForEachMaster(fn func(client *Client) error) error {
+ state, err := c.state.ReloadOrGet()
+ if err != nil {
+ return err
+ }
+
+ var wg sync.WaitGroup
+ errCh := make(chan error, 1)
+ for _, master := range state.Masters {
+ wg.Add(1)
+ go func(node *clusterNode) {
+ defer wg.Done()
+ err := fn(node.Client)
+ if err != nil {
+ select {
+ case errCh <- err:
+ default:
+ }
+ }
+ }(master)
+ }
+ wg.Wait()
+
+ select {
+ case err := <-errCh:
+ return err
+ default:
+ return nil
+ }
+}
+
+// ForEachSlave concurrently calls the fn on each slave node in the cluster.
+// It returns the first error if any.
+func (c *ClusterClient) ForEachSlave(fn func(client *Client) error) error {
+ state, err := c.state.ReloadOrGet()
+ if err != nil {
+ return err
+ }
+
+ var wg sync.WaitGroup
+ errCh := make(chan error, 1)
+ for _, slave := range state.Slaves {
+ wg.Add(1)
+ go func(node *clusterNode) {
+ defer wg.Done()
+ err := fn(node.Client)
+ if err != nil {
+ select {
+ case errCh <- err:
+ default:
+ }
+ }
+ }(slave)
+ }
+ wg.Wait()
+
+ select {
+ case err := <-errCh:
+ return err
+ default:
+ return nil
+ }
+}
+
+// ForEachNode concurrently calls the fn on each known node in the cluster.
+// It returns the first error if any.
+func (c *ClusterClient) ForEachNode(fn func(client *Client) error) error {
+ state, err := c.state.ReloadOrGet()
+ if err != nil {
+ return err
+ }
+
+ var wg sync.WaitGroup
+ errCh := make(chan error, 1)
+ worker := func(node *clusterNode) {
+ defer wg.Done()
+ err := fn(node.Client)
+ if err != nil {
+ select {
+ case errCh <- err:
+ default:
+ }
+ }
+ }
+
+ for _, node := range state.Masters {
+ wg.Add(1)
+ go worker(node)
+ }
+ for _, node := range state.Slaves {
+ wg.Add(1)
+ go worker(node)
+ }
+
+ wg.Wait()
+ select {
+ case err := <-errCh:
+ return err
+ default:
+ return nil
+ }
+}
+
+// PoolStats returns accumulated connection pool stats.
+func (c *ClusterClient) PoolStats() *PoolStats {
+ var acc PoolStats
+
+ state, _ := c.state.Get()
+ if state == nil {
+ return &acc
+ }
+
+ for _, node := range state.Masters {
+ s := node.Client.connPool.Stats()
+ acc.Hits += s.Hits
+ acc.Misses += s.Misses
+ acc.Timeouts += s.Timeouts
+
+ acc.TotalConns += s.TotalConns
+ acc.FreeConns += s.FreeConns
+ acc.StaleConns += s.StaleConns
+ }
+
+ for _, node := range state.Slaves {
+ s := node.Client.connPool.Stats()
+ acc.Hits += s.Hits
+ acc.Misses += s.Misses
+ acc.Timeouts += s.Timeouts
+
+ acc.TotalConns += s.TotalConns
+ acc.FreeConns += s.FreeConns
+ acc.StaleConns += s.StaleConns
+ }
+
+ return &acc
+}
+
+func (c *ClusterClient) loadState() (*clusterState, error) {
+ if c.opt.ClusterSlots != nil {
+ slots, err := c.opt.ClusterSlots()
+ if err != nil {
+ return nil, err
+ }
+ return newClusterState(c.nodes, slots, "")
+ }
+
+ addrs, err := c.nodes.Addrs()
+ if err != nil {
+ return nil, err
+ }
+
+ var firstErr error
+ for _, addr := range addrs {
+ node, err := c.nodes.GetOrCreate(addr)
+ if err != nil {
+ if firstErr == nil {
+ firstErr = err
+ }
+ continue
+ }
+
+ slots, err := node.Client.ClusterSlots().Result()
+ if err != nil {
+ if firstErr == nil {
+ firstErr = err
+ }
+ continue
+ }
+
+ return newClusterState(c.nodes, slots, node.Client.opt.Addr)
+ }
+
+ return nil, firstErr
+}
+
+// reaper closes idle connections to the cluster.
+func (c *ClusterClient) reaper(idleCheckFrequency time.Duration) {
+ ticker := time.NewTicker(idleCheckFrequency)
+ defer ticker.Stop()
+
+ for range ticker.C {
+ nodes, err := c.nodes.All()
+ if err != nil {
+ break
+ }
+
+ for _, node := range nodes {
+ _, err := node.Client.connPool.(*pool.ConnPool).ReapStaleConns()
+ if err != nil {
+ internal.Logf("ReapStaleConns failed: %s", err)
+ }
+ }
+ }
+}
+
+func (c *ClusterClient) Pipeline() Pipeliner {
+ pipe := Pipeline{
+ exec: c.processPipeline,
+ }
+ pipe.statefulCmdable.setProcessor(pipe.Process)
+ return &pipe
+}
+
+func (c *ClusterClient) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ return c.Pipeline().Pipelined(fn)
+}
+
+func (c *ClusterClient) WrapProcessPipeline(
+ fn func(oldProcess func([]Cmder) error) func([]Cmder) error,
+) {
+ c.processPipeline = fn(c.processPipeline)
+}
+
+func (c *ClusterClient) defaultProcessPipeline(cmds []Cmder) error {
+ cmdsMap, err := c.mapCmdsByNode(cmds)
+ if err != nil {
+ setCmdsErr(cmds, err)
+ return err
+ }
+
+ for attempt := 0; attempt <= c.opt.MaxRedirects; attempt++ {
+ if attempt > 0 {
+ time.Sleep(c.retryBackoff(attempt))
+ }
+
+ failedCmds := make(map[*clusterNode][]Cmder)
+
+ for node, cmds := range cmdsMap {
+ cn, err := node.Client.getConn()
+ if err != nil {
+ if err == pool.ErrClosed {
+ c.remapCmds(cmds, failedCmds)
+ } else {
+ setCmdsErr(cmds, err)
+ }
+ continue
+ }
+
+ err = c.pipelineProcessCmds(node, cn, cmds, failedCmds)
+ if err == nil || internal.IsRedisError(err) {
+ node.Client.connPool.Put(cn)
+ } else {
+ node.Client.connPool.Remove(cn)
+ }
+ }
+
+ if len(failedCmds) == 0 {
+ break
+ }
+ cmdsMap = failedCmds
+ }
+
+ return firstCmdsErr(cmds)
+}
+
+func (c *ClusterClient) mapCmdsByNode(cmds []Cmder) (map[*clusterNode][]Cmder, error) {
+ state, err := c.state.Get()
+ if err != nil {
+ setCmdsErr(cmds, err)
+ return nil, err
+ }
+
+ cmdsMap := make(map[*clusterNode][]Cmder)
+ cmdsAreReadOnly := c.cmdsAreReadOnly(cmds)
+ for _, cmd := range cmds {
+ var node *clusterNode
+ var err error
+ if cmdsAreReadOnly {
+ _, node, err = c.cmdSlotAndNode(cmd)
+ } else {
+ slot := c.cmdSlot(cmd)
+ node, err = state.slotMasterNode(slot)
+ }
+ if err != nil {
+ return nil, err
+ }
+ cmdsMap[node] = append(cmdsMap[node], cmd)
+ }
+ return cmdsMap, nil
+}
+
+func (c *ClusterClient) cmdsAreReadOnly(cmds []Cmder) bool {
+ for _, cmd := range cmds {
+ cmdInfo := c.cmdInfo(cmd.Name())
+ if cmdInfo == nil || !cmdInfo.ReadOnly {
+ return false
+ }
+ }
+ return true
+}
+
+func (c *ClusterClient) remapCmds(cmds []Cmder, failedCmds map[*clusterNode][]Cmder) {
+ remappedCmds, err := c.mapCmdsByNode(cmds)
+ if err != nil {
+ setCmdsErr(cmds, err)
+ return
+ }
+
+ for node, cmds := range remappedCmds {
+ failedCmds[node] = cmds
+ }
+}
+
+func (c *ClusterClient) pipelineProcessCmds(
+ node *clusterNode, cn *pool.Conn, cmds []Cmder, failedCmds map[*clusterNode][]Cmder,
+) error {
+ cn.SetWriteTimeout(c.opt.WriteTimeout)
+
+ err := writeCmd(cn, cmds...)
+ if err != nil {
+ setCmdsErr(cmds, err)
+ failedCmds[node] = cmds
+ return err
+ }
+
+ // Set read timeout for all commands.
+ cn.SetReadTimeout(c.opt.ReadTimeout)
+
+ return c.pipelineReadCmds(cn, cmds, failedCmds)
+}
+
+func (c *ClusterClient) pipelineReadCmds(
+ cn *pool.Conn, cmds []Cmder, failedCmds map[*clusterNode][]Cmder,
+) error {
+ for _, cmd := range cmds {
+ err := cmd.readReply(cn)
+ if err == nil {
+ continue
+ }
+
+ if c.checkMovedErr(cmd, err, failedCmds) {
+ continue
+ }
+
+ if internal.IsRedisError(err) {
+ continue
+ }
+
+ return err
+ }
+ return nil
+}
+
+func (c *ClusterClient) checkMovedErr(
+ cmd Cmder, err error, failedCmds map[*clusterNode][]Cmder,
+) bool {
+ moved, ask, addr := internal.IsMovedError(err)
+
+ if moved {
+ c.state.LazyReload()
+
+ node, err := c.nodes.GetOrCreate(addr)
+ if err != nil {
+ return false
+ }
+
+ failedCmds[node] = append(failedCmds[node], cmd)
+ return true
+ }
+
+ if ask {
+ node, err := c.nodes.GetOrCreate(addr)
+ if err != nil {
+ return false
+ }
+
+ failedCmds[node] = append(failedCmds[node], NewCmd("ASKING"), cmd)
+ return true
+ }
+
+ return false
+}
+
+// TxPipeline acts like Pipeline, but wraps queued commands with MULTI/EXEC.
+func (c *ClusterClient) TxPipeline() Pipeliner {
+ pipe := Pipeline{
+ exec: c.processTxPipeline,
+ }
+ pipe.statefulCmdable.setProcessor(pipe.Process)
+ return &pipe
+}
+
+func (c *ClusterClient) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ return c.TxPipeline().Pipelined(fn)
+}
+
+func (c *ClusterClient) defaultProcessTxPipeline(cmds []Cmder) error {
+ state, err := c.state.Get()
+ if err != nil {
+ return err
+ }
+
+ cmdsMap := c.mapCmdsBySlot(cmds)
+ for slot, cmds := range cmdsMap {
+ node, err := state.slotMasterNode(slot)
+ if err != nil {
+ setCmdsErr(cmds, err)
+ continue
+ }
+ cmdsMap := map[*clusterNode][]Cmder{node: cmds}
+
+ for attempt := 0; attempt <= c.opt.MaxRedirects; attempt++ {
+ if attempt > 0 {
+ time.Sleep(c.retryBackoff(attempt))
+ }
+
+ failedCmds := make(map[*clusterNode][]Cmder)
+
+ for node, cmds := range cmdsMap {
+ cn, err := node.Client.getConn()
+ if err != nil {
+ if err == pool.ErrClosed {
+ c.remapCmds(cmds, failedCmds)
+ } else {
+ setCmdsErr(cmds, err)
+ }
+ continue
+ }
+
+ err = c.txPipelineProcessCmds(node, cn, cmds, failedCmds)
+ if err == nil || internal.IsRedisError(err) {
+ node.Client.connPool.Put(cn)
+ } else {
+ node.Client.connPool.Remove(cn)
+ }
+ }
+
+ if len(failedCmds) == 0 {
+ break
+ }
+ cmdsMap = failedCmds
+ }
+ }
+
+ return firstCmdsErr(cmds)
+}
+
+func (c *ClusterClient) mapCmdsBySlot(cmds []Cmder) map[int][]Cmder {
+ cmdsMap := make(map[int][]Cmder)
+ for _, cmd := range cmds {
+ slot := c.cmdSlot(cmd)
+ cmdsMap[slot] = append(cmdsMap[slot], cmd)
+ }
+ return cmdsMap
+}
+
+func (c *ClusterClient) txPipelineProcessCmds(
+ node *clusterNode, cn *pool.Conn, cmds []Cmder, failedCmds map[*clusterNode][]Cmder,
+) error {
+ cn.SetWriteTimeout(c.opt.WriteTimeout)
+ if err := txPipelineWriteMulti(cn, cmds); err != nil {
+ setCmdsErr(cmds, err)
+ failedCmds[node] = cmds
+ return err
+ }
+
+ // Set read timeout for all commands.
+ cn.SetReadTimeout(c.opt.ReadTimeout)
+
+ if err := c.txPipelineReadQueued(cn, cmds, failedCmds); err != nil {
+ setCmdsErr(cmds, err)
+ return err
+ }
+
+ return pipelineReadCmds(cn, cmds)
+}
+
+func (c *ClusterClient) txPipelineReadQueued(
+ cn *pool.Conn, cmds []Cmder, failedCmds map[*clusterNode][]Cmder,
+) error {
+ // Parse queued replies.
+ var statusCmd StatusCmd
+ if err := statusCmd.readReply(cn); err != nil {
+ return err
+ }
+
+ for _, cmd := range cmds {
+ err := statusCmd.readReply(cn)
+ if err == nil {
+ continue
+ }
+
+ if c.checkMovedErr(cmd, err, failedCmds) || internal.IsRedisError(err) {
+ continue
+ }
+
+ return err
+ }
+
+ // Parse number of replies.
+ line, err := cn.Rd.ReadLine()
+ if err != nil {
+ if err == Nil {
+ err = TxFailedErr
+ }
+ return err
+ }
+
+ switch line[0] {
+ case proto.ErrorReply:
+ err := proto.ParseErrorReply(line)
+ for _, cmd := range cmds {
+ if !c.checkMovedErr(cmd, err, failedCmds) {
+ break
+ }
+ }
+ return err
+ case proto.ArrayReply:
+ // ok
+ default:
+ err := fmt.Errorf("redis: expected '*', but got line %q", line)
+ return err
+ }
+
+ return nil
+}
+
+func (c *ClusterClient) pubSub(channels []string) *PubSub {
+ var node *clusterNode
+ pubsub := &PubSub{
+ opt: c.opt.clientOptions(),
+
+ newConn: func(channels []string) (*pool.Conn, error) {
+ if node == nil {
+ var slot int
+ if len(channels) > 0 {
+ slot = hashtag.Slot(channels[0])
+ } else {
+ slot = -1
+ }
+
+ masterNode, err := c.slotMasterNode(slot)
+ if err != nil {
+ return nil, err
+ }
+ node = masterNode
+ }
+ return node.Client.newConn()
+ },
+ closeConn: func(cn *pool.Conn) error {
+ return node.Client.connPool.CloseConn(cn)
+ },
+ }
+ pubsub.init()
+ return pubsub
+}
+
+// Subscribe subscribes the client to the specified channels.
+// Channels can be omitted to create empty subscription.
+func (c *ClusterClient) Subscribe(channels ...string) *PubSub {
+ pubsub := c.pubSub(channels)
+ if len(channels) > 0 {
+ _ = pubsub.Subscribe(channels...)
+ }
+ return pubsub
+}
+
+// PSubscribe subscribes the client to the given patterns.
+// Patterns can be omitted to create empty subscription.
+func (c *ClusterClient) PSubscribe(channels ...string) *PubSub {
+ pubsub := c.pubSub(channels)
+ if len(channels) > 0 {
+ _ = pubsub.PSubscribe(channels...)
+ }
+ return pubsub
+}
+
+func useOriginAddr(originAddr, nodeAddr string) bool {
+ nodeHost, nodePort, err := net.SplitHostPort(nodeAddr)
+ if err != nil {
+ return false
+ }
+
+ nodeIP := net.ParseIP(nodeHost)
+ if nodeIP == nil {
+ return false
+ }
+
+ if !nodeIP.IsLoopback() {
+ return false
+ }
+
+ _, originPort, err := net.SplitHostPort(originAddr)
+ if err != nil {
+ return false
+ }
+
+ return nodePort == originPort
+}
+
+func isLoopbackAddr(addr string) bool {
+ host, _, err := net.SplitHostPort(addr)
+ if err != nil {
+ return false
+ }
+
+ ip := net.ParseIP(host)
+ if ip == nil {
+ return false
+ }
+
+ return ip.IsLoopback()
+}
+
+func appendUniqueNode(nodes []*clusterNode, node *clusterNode) []*clusterNode {
+ for _, n := range nodes {
+ if n == node {
+ return nodes
+ }
+ }
+ return append(nodes, node)
+}
+
+func appendIfNotExists(ss []string, es ...string) []string {
+loop:
+ for _, e := range es {
+ for _, s := range ss {
+ if s == e {
+ continue loop
+ }
+ }
+ ss = append(ss, e)
+ }
+ return ss
+}
+
+func remove(ss []string, es ...string) []string {
+ if len(es) == 0 {
+ return ss[:0]
+ }
+ for _, e := range es {
+ for i, s := range ss {
+ if s == e {
+ ss = append(ss[:i], ss[i+1:]...)
+ break
+ }
+ }
+ }
+ return ss
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/cluster_commands.go b/src/dma/vendor/github.com/go-redis/redis/cluster_commands.go
new file mode 100644
index 00000000..dff62c90
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/cluster_commands.go
@@ -0,0 +1,22 @@
+package redis
+
+import "sync/atomic"
+
+func (c *ClusterClient) DBSize() *IntCmd {
+ cmd := NewIntCmd("dbsize")
+ var size int64
+ err := c.ForEachMaster(func(master *Client) error {
+ n, err := master.DBSize().Result()
+ if err != nil {
+ return err
+ }
+ atomic.AddInt64(&size, n)
+ return nil
+ })
+ if err != nil {
+ cmd.setErr(err)
+ return cmd
+ }
+ cmd.val = size
+ return cmd
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/command.go b/src/dma/vendor/github.com/go-redis/redis/command.go
new file mode 100644
index 00000000..11472bec
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/command.go
@@ -0,0 +1,1225 @@
+package redis
+
+import (
+ "bytes"
+ "fmt"
+ "strconv"
+ "strings"
+ "time"
+
+ "github.com/go-redis/redis/internal"
+ "github.com/go-redis/redis/internal/pool"
+ "github.com/go-redis/redis/internal/proto"
+ "github.com/go-redis/redis/internal/util"
+)
+
+type Cmder interface {
+ Name() string
+ Args() []interface{}
+ stringArg(int) string
+
+ readReply(*pool.Conn) error
+ setErr(error)
+
+ readTimeout() *time.Duration
+
+ Err() error
+ fmt.Stringer
+}
+
+func setCmdsErr(cmds []Cmder, e error) {
+ for _, cmd := range cmds {
+ if cmd.Err() == nil {
+ cmd.setErr(e)
+ }
+ }
+}
+
+func firstCmdsErr(cmds []Cmder) error {
+ for _, cmd := range cmds {
+ if err := cmd.Err(); err != nil {
+ return err
+ }
+ }
+ return nil
+}
+
+func writeCmd(cn *pool.Conn, cmds ...Cmder) error {
+ cn.Wb.Reset()
+ for _, cmd := range cmds {
+ if err := cn.Wb.Append(cmd.Args()); err != nil {
+ return err
+ }
+ }
+
+ _, err := cn.Write(cn.Wb.Bytes())
+ return err
+}
+
+func cmdString(cmd Cmder, val interface{}) string {
+ var ss []string
+ for _, arg := range cmd.Args() {
+ ss = append(ss, fmt.Sprint(arg))
+ }
+ s := strings.Join(ss, " ")
+ if err := cmd.Err(); err != nil {
+ return s + ": " + err.Error()
+ }
+ if val != nil {
+ switch vv := val.(type) {
+ case []byte:
+ return s + ": " + string(vv)
+ default:
+ return s + ": " + fmt.Sprint(val)
+ }
+ }
+ return s
+
+}
+
+func cmdFirstKeyPos(cmd Cmder, info *CommandInfo) int {
+ switch cmd.Name() {
+ case "eval", "evalsha":
+ if cmd.stringArg(2) != "0" {
+ return 3
+ }
+
+ return 0
+ case "publish":
+ return 1
+ }
+ if info == nil {
+ return 0
+ }
+ return int(info.FirstKeyPos)
+}
+
+//------------------------------------------------------------------------------
+
+type baseCmd struct {
+ _args []interface{}
+ err error
+
+ _readTimeout *time.Duration
+}
+
+var _ Cmder = (*Cmd)(nil)
+
+func (cmd *baseCmd) Err() error {
+ return cmd.err
+}
+
+func (cmd *baseCmd) Args() []interface{} {
+ return cmd._args
+}
+
+func (cmd *baseCmd) stringArg(pos int) string {
+ if pos < 0 || pos >= len(cmd._args) {
+ return ""
+ }
+ s, _ := cmd._args[pos].(string)
+ return s
+}
+
+func (cmd *baseCmd) Name() string {
+ if len(cmd._args) > 0 {
+ // Cmd name must be lower cased.
+ s := internal.ToLower(cmd.stringArg(0))
+ cmd._args[0] = s
+ return s
+ }
+ return ""
+}
+
+func (cmd *baseCmd) readTimeout() *time.Duration {
+ return cmd._readTimeout
+}
+
+func (cmd *baseCmd) setReadTimeout(d time.Duration) {
+ cmd._readTimeout = &d
+}
+
+func (cmd *baseCmd) setErr(e error) {
+ cmd.err = e
+}
+
+//------------------------------------------------------------------------------
+
+type Cmd struct {
+ baseCmd
+
+ val interface{}
+}
+
+func NewCmd(args ...interface{}) *Cmd {
+ return &Cmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *Cmd) Val() interface{} {
+ return cmd.val
+}
+
+func (cmd *Cmd) Result() (interface{}, error) {
+ return cmd.val, cmd.err
+}
+
+func (cmd *Cmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *Cmd) readReply(cn *pool.Conn) error {
+ cmd.val, cmd.err = cn.Rd.ReadReply(sliceParser)
+ if cmd.err != nil {
+ return cmd.err
+ }
+ if b, ok := cmd.val.([]byte); ok {
+ // Bytes must be copied, because underlying memory is reused.
+ cmd.val = string(b)
+ }
+ return nil
+}
+
+//------------------------------------------------------------------------------
+
+type SliceCmd struct {
+ baseCmd
+
+ val []interface{}
+}
+
+var _ Cmder = (*SliceCmd)(nil)
+
+func NewSliceCmd(args ...interface{}) *SliceCmd {
+ return &SliceCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *SliceCmd) Val() []interface{} {
+ return cmd.val
+}
+
+func (cmd *SliceCmd) Result() ([]interface{}, error) {
+ return cmd.val, cmd.err
+}
+
+func (cmd *SliceCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *SliceCmd) readReply(cn *pool.Conn) error {
+ var v interface{}
+ v, cmd.err = cn.Rd.ReadArrayReply(sliceParser)
+ if cmd.err != nil {
+ return cmd.err
+ }
+ cmd.val = v.([]interface{})
+ return nil
+}
+
+//------------------------------------------------------------------------------
+
+type StatusCmd struct {
+ baseCmd
+
+ val string
+}
+
+var _ Cmder = (*StatusCmd)(nil)
+
+func NewStatusCmd(args ...interface{}) *StatusCmd {
+ return &StatusCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *StatusCmd) Val() string {
+ return cmd.val
+}
+
+func (cmd *StatusCmd) Result() (string, error) {
+ return cmd.val, cmd.err
+}
+
+func (cmd *StatusCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *StatusCmd) readReply(cn *pool.Conn) error {
+ cmd.val, cmd.err = cn.Rd.ReadStringReply()
+ return cmd.err
+}
+
+//------------------------------------------------------------------------------
+
+type IntCmd struct {
+ baseCmd
+
+ val int64
+}
+
+var _ Cmder = (*IntCmd)(nil)
+
+func NewIntCmd(args ...interface{}) *IntCmd {
+ return &IntCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *IntCmd) Val() int64 {
+ return cmd.val
+}
+
+func (cmd *IntCmd) Result() (int64, error) {
+ return cmd.val, cmd.err
+}
+
+func (cmd *IntCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *IntCmd) readReply(cn *pool.Conn) error {
+ cmd.val, cmd.err = cn.Rd.ReadIntReply()
+ return cmd.err
+}
+
+//------------------------------------------------------------------------------
+
+type DurationCmd struct {
+ baseCmd
+
+ val time.Duration
+ precision time.Duration
+}
+
+var _ Cmder = (*DurationCmd)(nil)
+
+func NewDurationCmd(precision time.Duration, args ...interface{}) *DurationCmd {
+ return &DurationCmd{
+ baseCmd: baseCmd{_args: args},
+ precision: precision,
+ }
+}
+
+func (cmd *DurationCmd) Val() time.Duration {
+ return cmd.val
+}
+
+func (cmd *DurationCmd) Result() (time.Duration, error) {
+ return cmd.val, cmd.err
+}
+
+func (cmd *DurationCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *DurationCmd) readReply(cn *pool.Conn) error {
+ var n int64
+ n, cmd.err = cn.Rd.ReadIntReply()
+ if cmd.err != nil {
+ return cmd.err
+ }
+ cmd.val = time.Duration(n) * cmd.precision
+ return nil
+}
+
+//------------------------------------------------------------------------------
+
+type TimeCmd struct {
+ baseCmd
+
+ val time.Time
+}
+
+var _ Cmder = (*TimeCmd)(nil)
+
+func NewTimeCmd(args ...interface{}) *TimeCmd {
+ return &TimeCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *TimeCmd) Val() time.Time {
+ return cmd.val
+}
+
+func (cmd *TimeCmd) Result() (time.Time, error) {
+ return cmd.val, cmd.err
+}
+
+func (cmd *TimeCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *TimeCmd) readReply(cn *pool.Conn) error {
+ var v interface{}
+ v, cmd.err = cn.Rd.ReadArrayReply(timeParser)
+ if cmd.err != nil {
+ return cmd.err
+ }
+ cmd.val = v.(time.Time)
+ return nil
+}
+
+//------------------------------------------------------------------------------
+
+type BoolCmd struct {
+ baseCmd
+
+ val bool
+}
+
+var _ Cmder = (*BoolCmd)(nil)
+
+func NewBoolCmd(args ...interface{}) *BoolCmd {
+ return &BoolCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *BoolCmd) Val() bool {
+ return cmd.val
+}
+
+func (cmd *BoolCmd) Result() (bool, error) {
+ return cmd.val, cmd.err
+}
+
+func (cmd *BoolCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+var ok = []byte("OK")
+
+func (cmd *BoolCmd) readReply(cn *pool.Conn) error {
+ var v interface{}
+ v, cmd.err = cn.Rd.ReadReply(nil)
+ // `SET key value NX` returns nil when key already exists. But
+ // `SETNX key value` returns bool (0/1). So convert nil to bool.
+ // TODO: is this okay?
+ if cmd.err == Nil {
+ cmd.val = false
+ cmd.err = nil
+ return nil
+ }
+ if cmd.err != nil {
+ return cmd.err
+ }
+ switch v := v.(type) {
+ case int64:
+ cmd.val = v == 1
+ return nil
+ case []byte:
+ cmd.val = bytes.Equal(v, ok)
+ return nil
+ default:
+ cmd.err = fmt.Errorf("got %T, wanted int64 or string", v)
+ return cmd.err
+ }
+}
+
+//------------------------------------------------------------------------------
+
+type StringCmd struct {
+ baseCmd
+
+ val []byte
+}
+
+var _ Cmder = (*StringCmd)(nil)
+
+func NewStringCmd(args ...interface{}) *StringCmd {
+ return &StringCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *StringCmd) Val() string {
+ return util.BytesToString(cmd.val)
+}
+
+func (cmd *StringCmd) Result() (string, error) {
+ return cmd.Val(), cmd.err
+}
+
+func (cmd *StringCmd) Bytes() ([]byte, error) {
+ return cmd.val, cmd.err
+}
+
+func (cmd *StringCmd) Int64() (int64, error) {
+ if cmd.err != nil {
+ return 0, cmd.err
+ }
+ return strconv.ParseInt(cmd.Val(), 10, 64)
+}
+
+func (cmd *StringCmd) Uint64() (uint64, error) {
+ if cmd.err != nil {
+ return 0, cmd.err
+ }
+ return strconv.ParseUint(cmd.Val(), 10, 64)
+}
+
+func (cmd *StringCmd) Float64() (float64, error) {
+ if cmd.err != nil {
+ return 0, cmd.err
+ }
+ return strconv.ParseFloat(cmd.Val(), 64)
+}
+
+func (cmd *StringCmd) Scan(val interface{}) error {
+ if cmd.err != nil {
+ return cmd.err
+ }
+ return proto.Scan(cmd.val, val)
+}
+
+func (cmd *StringCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *StringCmd) readReply(cn *pool.Conn) error {
+ cmd.val, cmd.err = cn.Rd.ReadBytesReply()
+ return cmd.err
+}
+
+//------------------------------------------------------------------------------
+
+type FloatCmd struct {
+ baseCmd
+
+ val float64
+}
+
+var _ Cmder = (*FloatCmd)(nil)
+
+func NewFloatCmd(args ...interface{}) *FloatCmd {
+ return &FloatCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *FloatCmd) Val() float64 {
+ return cmd.val
+}
+
+func (cmd *FloatCmd) Result() (float64, error) {
+ return cmd.Val(), cmd.Err()
+}
+
+func (cmd *FloatCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *FloatCmd) readReply(cn *pool.Conn) error {
+ cmd.val, cmd.err = cn.Rd.ReadFloatReply()
+ return cmd.err
+}
+
+//------------------------------------------------------------------------------
+
+type StringSliceCmd struct {
+ baseCmd
+
+ val []string
+}
+
+var _ Cmder = (*StringSliceCmd)(nil)
+
+func NewStringSliceCmd(args ...interface{}) *StringSliceCmd {
+ return &StringSliceCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *StringSliceCmd) Val() []string {
+ return cmd.val
+}
+
+func (cmd *StringSliceCmd) Result() ([]string, error) {
+ return cmd.Val(), cmd.Err()
+}
+
+func (cmd *StringSliceCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *StringSliceCmd) ScanSlice(container interface{}) error {
+ return proto.ScanSlice(cmd.Val(), container)
+}
+
+func (cmd *StringSliceCmd) readReply(cn *pool.Conn) error {
+ var v interface{}
+ v, cmd.err = cn.Rd.ReadArrayReply(stringSliceParser)
+ if cmd.err != nil {
+ return cmd.err
+ }
+ cmd.val = v.([]string)
+ return nil
+}
+
+//------------------------------------------------------------------------------
+
+type BoolSliceCmd struct {
+ baseCmd
+
+ val []bool
+}
+
+var _ Cmder = (*BoolSliceCmd)(nil)
+
+func NewBoolSliceCmd(args ...interface{}) *BoolSliceCmd {
+ return &BoolSliceCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *BoolSliceCmd) Val() []bool {
+ return cmd.val
+}
+
+func (cmd *BoolSliceCmd) Result() ([]bool, error) {
+ return cmd.val, cmd.err
+}
+
+func (cmd *BoolSliceCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *BoolSliceCmd) readReply(cn *pool.Conn) error {
+ var v interface{}
+ v, cmd.err = cn.Rd.ReadArrayReply(boolSliceParser)
+ if cmd.err != nil {
+ return cmd.err
+ }
+ cmd.val = v.([]bool)
+ return nil
+}
+
+//------------------------------------------------------------------------------
+
+type StringStringMapCmd struct {
+ baseCmd
+
+ val map[string]string
+}
+
+var _ Cmder = (*StringStringMapCmd)(nil)
+
+func NewStringStringMapCmd(args ...interface{}) *StringStringMapCmd {
+ return &StringStringMapCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *StringStringMapCmd) Val() map[string]string {
+ return cmd.val
+}
+
+func (cmd *StringStringMapCmd) Result() (map[string]string, error) {
+ return cmd.val, cmd.err
+}
+
+func (cmd *StringStringMapCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *StringStringMapCmd) readReply(cn *pool.Conn) error {
+ var v interface{}
+ v, cmd.err = cn.Rd.ReadArrayReply(stringStringMapParser)
+ if cmd.err != nil {
+ return cmd.err
+ }
+ cmd.val = v.(map[string]string)
+ return nil
+}
+
+//------------------------------------------------------------------------------
+
+type StringIntMapCmd struct {
+ baseCmd
+
+ val map[string]int64
+}
+
+var _ Cmder = (*StringIntMapCmd)(nil)
+
+func NewStringIntMapCmd(args ...interface{}) *StringIntMapCmd {
+ return &StringIntMapCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *StringIntMapCmd) Val() map[string]int64 {
+ return cmd.val
+}
+
+func (cmd *StringIntMapCmd) Result() (map[string]int64, error) {
+ return cmd.val, cmd.err
+}
+
+func (cmd *StringIntMapCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *StringIntMapCmd) readReply(cn *pool.Conn) error {
+ var v interface{}
+ v, cmd.err = cn.Rd.ReadArrayReply(stringIntMapParser)
+ if cmd.err != nil {
+ return cmd.err
+ }
+ cmd.val = v.(map[string]int64)
+ return nil
+}
+
+//------------------------------------------------------------------------------
+
+type StringStructMapCmd struct {
+ baseCmd
+
+ val map[string]struct{}
+}
+
+var _ Cmder = (*StringStructMapCmd)(nil)
+
+func NewStringStructMapCmd(args ...interface{}) *StringStructMapCmd {
+ return &StringStructMapCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *StringStructMapCmd) Val() map[string]struct{} {
+ return cmd.val
+}
+
+func (cmd *StringStructMapCmd) Result() (map[string]struct{}, error) {
+ return cmd.val, cmd.err
+}
+
+func (cmd *StringStructMapCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *StringStructMapCmd) readReply(cn *pool.Conn) error {
+ var v interface{}
+ v, cmd.err = cn.Rd.ReadArrayReply(stringStructMapParser)
+ if cmd.err != nil {
+ return cmd.err
+ }
+ cmd.val = v.(map[string]struct{})
+ return nil
+}
+
+//------------------------------------------------------------------------------
+
+type XStream struct {
+ Stream string
+ Messages []*XMessage
+}
+
+type XMessage struct {
+ ID string
+ Values map[string]interface{}
+}
+
+//------------------------------------------------------------------------------
+
+type XStreamSliceCmd struct {
+ baseCmd
+
+ val []*XStream
+}
+
+var _ Cmder = (*XStreamSliceCmd)(nil)
+
+func NewXStreamSliceCmd(args ...interface{}) *XStreamSliceCmd {
+ return &XStreamSliceCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *XStreamSliceCmd) Val() []*XStream {
+ return cmd.val
+}
+
+func (cmd *XStreamSliceCmd) Result() ([]*XStream, error) {
+ return cmd.val, cmd.err
+}
+
+func (cmd *XStreamSliceCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *XStreamSliceCmd) readReply(cn *pool.Conn) error {
+ var v interface{}
+ v, cmd.err = cn.Rd.ReadArrayReply(xStreamSliceParser)
+ if cmd.err != nil {
+ return cmd.err
+ }
+ cmd.val = v.([]*XStream)
+ return nil
+}
+
+// Implements proto.MultiBulkParse
+func xStreamSliceParser(rd *proto.Reader, n int64) (interface{}, error) {
+ xx := make([]*XStream, n)
+ for i := int64(0); i < n; i++ {
+ v, err := rd.ReadArrayReply(xStreamParser)
+ if err != nil {
+ return nil, err
+ }
+ xx[i] = v.(*XStream)
+ }
+ return xx, nil
+}
+
+// Implements proto.MultiBulkParse
+func xStreamParser(rd *proto.Reader, n int64) (interface{}, error) {
+ if n != 2 {
+ return nil, fmt.Errorf("got %d, wanted 2", n)
+ }
+
+ stream, err := rd.ReadStringReply()
+ if err != nil {
+ return nil, err
+ }
+
+ v, err := rd.ReadArrayReply(xMessageSliceParser)
+ if err != nil {
+ return nil, err
+ }
+
+ return &XStream{
+ Stream: stream,
+ Messages: v.([]*XMessage),
+ }, nil
+}
+
+//------------------------------------------------------------------------------
+
+type XMessageSliceCmd struct {
+ baseCmd
+
+ val []*XMessage
+}
+
+var _ Cmder = (*XMessageSliceCmd)(nil)
+
+func NewXMessageSliceCmd(args ...interface{}) *XMessageSliceCmd {
+ return &XMessageSliceCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *XMessageSliceCmd) Val() []*XMessage {
+ return cmd.val
+}
+
+func (cmd *XMessageSliceCmd) Result() ([]*XMessage, error) {
+ return cmd.val, cmd.err
+}
+
+func (cmd *XMessageSliceCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *XMessageSliceCmd) readReply(cn *pool.Conn) error {
+ var v interface{}
+ v, cmd.err = cn.Rd.ReadArrayReply(xMessageSliceParser)
+ if cmd.err != nil {
+ return cmd.err
+ }
+ cmd.val = v.([]*XMessage)
+ return nil
+}
+
+// Implements proto.MultiBulkParse
+func xMessageSliceParser(rd *proto.Reader, n int64) (interface{}, error) {
+ msgs := make([]*XMessage, n)
+ for i := int64(0); i < n; i++ {
+ v, err := rd.ReadArrayReply(xMessageParser)
+ if err != nil {
+ return nil, err
+ }
+ msgs[i] = v.(*XMessage)
+ }
+ return msgs, nil
+}
+
+// Implements proto.MultiBulkParse
+func xMessageParser(rd *proto.Reader, n int64) (interface{}, error) {
+ id, err := rd.ReadStringReply()
+ if err != nil {
+ return nil, err
+ }
+
+ v, err := rd.ReadArrayReply(xKeyValueParser)
+ if err != nil {
+ return nil, err
+ }
+
+ return &XMessage{
+ ID: id,
+ Values: v.(map[string]interface{}),
+ }, nil
+}
+
+// Implements proto.MultiBulkParse
+func xKeyValueParser(rd *proto.Reader, n int64) (interface{}, error) {
+ values := make(map[string]interface{}, n)
+ for i := int64(0); i < n; i += 2 {
+ key, err := rd.ReadStringReply()
+ if err != nil {
+ return nil, err
+ }
+
+ value, err := rd.ReadStringReply()
+ if err != nil {
+ return nil, err
+ }
+
+ values[key] = value
+ }
+ return values, nil
+}
+
+//------------------------------------------------------------------------------
+
+type ZSliceCmd struct {
+ baseCmd
+
+ val []Z
+}
+
+var _ Cmder = (*ZSliceCmd)(nil)
+
+func NewZSliceCmd(args ...interface{}) *ZSliceCmd {
+ return &ZSliceCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *ZSliceCmd) Val() []Z {
+ return cmd.val
+}
+
+func (cmd *ZSliceCmd) Result() ([]Z, error) {
+ return cmd.val, cmd.err
+}
+
+func (cmd *ZSliceCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *ZSliceCmd) readReply(cn *pool.Conn) error {
+ var v interface{}
+ v, cmd.err = cn.Rd.ReadArrayReply(zSliceParser)
+ if cmd.err != nil {
+ return cmd.err
+ }
+ cmd.val = v.([]Z)
+ return nil
+}
+
+//------------------------------------------------------------------------------
+
+type ScanCmd struct {
+ baseCmd
+
+ page []string
+ cursor uint64
+
+ process func(cmd Cmder) error
+}
+
+var _ Cmder = (*ScanCmd)(nil)
+
+func NewScanCmd(process func(cmd Cmder) error, args ...interface{}) *ScanCmd {
+ return &ScanCmd{
+ baseCmd: baseCmd{_args: args},
+ process: process,
+ }
+}
+
+func (cmd *ScanCmd) Val() (keys []string, cursor uint64) {
+ return cmd.page, cmd.cursor
+}
+
+func (cmd *ScanCmd) Result() (keys []string, cursor uint64, err error) {
+ return cmd.page, cmd.cursor, cmd.err
+}
+
+func (cmd *ScanCmd) String() string {
+ return cmdString(cmd, cmd.page)
+}
+
+func (cmd *ScanCmd) readReply(cn *pool.Conn) error {
+ cmd.page, cmd.cursor, cmd.err = cn.Rd.ReadScanReply()
+ return cmd.err
+}
+
+// Iterator creates a new ScanIterator.
+func (cmd *ScanCmd) Iterator() *ScanIterator {
+ return &ScanIterator{
+ cmd: cmd,
+ }
+}
+
+//------------------------------------------------------------------------------
+
+type ClusterNode struct {
+ Id string
+ Addr string
+}
+
+type ClusterSlot struct {
+ Start int
+ End int
+ Nodes []ClusterNode
+}
+
+type ClusterSlotsCmd struct {
+ baseCmd
+
+ val []ClusterSlot
+}
+
+var _ Cmder = (*ClusterSlotsCmd)(nil)
+
+func NewClusterSlotsCmd(args ...interface{}) *ClusterSlotsCmd {
+ return &ClusterSlotsCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *ClusterSlotsCmd) Val() []ClusterSlot {
+ return cmd.val
+}
+
+func (cmd *ClusterSlotsCmd) Result() ([]ClusterSlot, error) {
+ return cmd.Val(), cmd.Err()
+}
+
+func (cmd *ClusterSlotsCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *ClusterSlotsCmd) readReply(cn *pool.Conn) error {
+ var v interface{}
+ v, cmd.err = cn.Rd.ReadArrayReply(clusterSlotsParser)
+ if cmd.err != nil {
+ return cmd.err
+ }
+ cmd.val = v.([]ClusterSlot)
+ return nil
+}
+
+//------------------------------------------------------------------------------
+
+// GeoLocation is used with GeoAdd to add geospatial location.
+type GeoLocation struct {
+ Name string
+ Longitude, Latitude, Dist float64
+ GeoHash int64
+}
+
+// GeoRadiusQuery is used with GeoRadius to query geospatial index.
+type GeoRadiusQuery struct {
+ Radius float64
+ // Can be m, km, ft, or mi. Default is km.
+ Unit string
+ WithCoord bool
+ WithDist bool
+ WithGeoHash bool
+ Count int
+ // Can be ASC or DESC. Default is no sort order.
+ Sort string
+ Store string
+ StoreDist string
+}
+
+type GeoLocationCmd struct {
+ baseCmd
+
+ q *GeoRadiusQuery
+ locations []GeoLocation
+}
+
+var _ Cmder = (*GeoLocationCmd)(nil)
+
+func NewGeoLocationCmd(q *GeoRadiusQuery, args ...interface{}) *GeoLocationCmd {
+ args = append(args, q.Radius)
+ if q.Unit != "" {
+ args = append(args, q.Unit)
+ } else {
+ args = append(args, "km")
+ }
+ if q.WithCoord {
+ args = append(args, "withcoord")
+ }
+ if q.WithDist {
+ args = append(args, "withdist")
+ }
+ if q.WithGeoHash {
+ args = append(args, "withhash")
+ }
+ if q.Count > 0 {
+ args = append(args, "count", q.Count)
+ }
+ if q.Sort != "" {
+ args = append(args, q.Sort)
+ }
+ if q.Store != "" {
+ args = append(args, "store")
+ args = append(args, q.Store)
+ }
+ if q.StoreDist != "" {
+ args = append(args, "storedist")
+ args = append(args, q.StoreDist)
+ }
+ return &GeoLocationCmd{
+ baseCmd: baseCmd{_args: args},
+ q: q,
+ }
+}
+
+func (cmd *GeoLocationCmd) Val() []GeoLocation {
+ return cmd.locations
+}
+
+func (cmd *GeoLocationCmd) Result() ([]GeoLocation, error) {
+ return cmd.locations, cmd.err
+}
+
+func (cmd *GeoLocationCmd) String() string {
+ return cmdString(cmd, cmd.locations)
+}
+
+func (cmd *GeoLocationCmd) readReply(cn *pool.Conn) error {
+ var v interface{}
+ v, cmd.err = cn.Rd.ReadArrayReply(newGeoLocationSliceParser(cmd.q))
+ if cmd.err != nil {
+ return cmd.err
+ }
+ cmd.locations = v.([]GeoLocation)
+ return nil
+}
+
+//------------------------------------------------------------------------------
+
+type GeoPos struct {
+ Longitude, Latitude float64
+}
+
+type GeoPosCmd struct {
+ baseCmd
+
+ positions []*GeoPos
+}
+
+var _ Cmder = (*GeoPosCmd)(nil)
+
+func NewGeoPosCmd(args ...interface{}) *GeoPosCmd {
+ return &GeoPosCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *GeoPosCmd) Val() []*GeoPos {
+ return cmd.positions
+}
+
+func (cmd *GeoPosCmd) Result() ([]*GeoPos, error) {
+ return cmd.Val(), cmd.Err()
+}
+
+func (cmd *GeoPosCmd) String() string {
+ return cmdString(cmd, cmd.positions)
+}
+
+func (cmd *GeoPosCmd) readReply(cn *pool.Conn) error {
+ var v interface{}
+ v, cmd.err = cn.Rd.ReadArrayReply(geoPosSliceParser)
+ if cmd.err != nil {
+ return cmd.err
+ }
+ cmd.positions = v.([]*GeoPos)
+ return nil
+}
+
+//------------------------------------------------------------------------------
+
+type CommandInfo struct {
+ Name string
+ Arity int8
+ Flags []string
+ FirstKeyPos int8
+ LastKeyPos int8
+ StepCount int8
+ ReadOnly bool
+}
+
+type CommandsInfoCmd struct {
+ baseCmd
+
+ val map[string]*CommandInfo
+}
+
+var _ Cmder = (*CommandsInfoCmd)(nil)
+
+func NewCommandsInfoCmd(args ...interface{}) *CommandsInfoCmd {
+ return &CommandsInfoCmd{
+ baseCmd: baseCmd{_args: args},
+ }
+}
+
+func (cmd *CommandsInfoCmd) Val() map[string]*CommandInfo {
+ return cmd.val
+}
+
+func (cmd *CommandsInfoCmd) Result() (map[string]*CommandInfo, error) {
+ return cmd.Val(), cmd.Err()
+}
+
+func (cmd *CommandsInfoCmd) String() string {
+ return cmdString(cmd, cmd.val)
+}
+
+func (cmd *CommandsInfoCmd) readReply(cn *pool.Conn) error {
+ var v interface{}
+ v, cmd.err = cn.Rd.ReadArrayReply(commandInfoSliceParser)
+ if cmd.err != nil {
+ return cmd.err
+ }
+ cmd.val = v.(map[string]*CommandInfo)
+ return nil
+}
+
+//------------------------------------------------------------------------------
+
+type cmdsInfoCache struct {
+ fn func() (map[string]*CommandInfo, error)
+
+ once internal.Once
+ cmds map[string]*CommandInfo
+}
+
+func newCmdsInfoCache(fn func() (map[string]*CommandInfo, error)) *cmdsInfoCache {
+ return &cmdsInfoCache{
+ fn: fn,
+ }
+}
+
+func (c *cmdsInfoCache) Get() (map[string]*CommandInfo, error) {
+ err := c.once.Do(func() error {
+ cmds, err := c.fn()
+ if err != nil {
+ return err
+ }
+ c.cmds = cmds
+ return nil
+ })
+ return c.cmds, err
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/commands.go b/src/dma/vendor/github.com/go-redis/redis/commands.go
new file mode 100644
index 00000000..dddf8acd
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/commands.go
@@ -0,0 +1,2337 @@
+package redis
+
+import (
+ "errors"
+ "io"
+ "time"
+
+ "github.com/go-redis/redis/internal"
+)
+
+func readTimeout(timeout time.Duration) time.Duration {
+ if timeout == 0 {
+ return 0
+ }
+ return timeout + 10*time.Second
+}
+
+func usePrecise(dur time.Duration) bool {
+ return dur < time.Second || dur%time.Second != 0
+}
+
+func formatMs(dur time.Duration) int64 {
+ if dur > 0 && dur < time.Millisecond {
+ internal.Logf(
+ "specified duration is %s, but minimal supported value is %s",
+ dur, time.Millisecond,
+ )
+ }
+ return int64(dur / time.Millisecond)
+}
+
+func formatSec(dur time.Duration) int64 {
+ if dur > 0 && dur < time.Second {
+ internal.Logf(
+ "specified duration is %s, but minimal supported value is %s",
+ dur, time.Second,
+ )
+ }
+ return int64(dur / time.Second)
+}
+
+func appendArgs(dst, src []interface{}) []interface{} {
+ if len(src) == 1 {
+ if ss, ok := src[0].([]string); ok {
+ for _, s := range ss {
+ dst = append(dst, s)
+ }
+ return dst
+ }
+ }
+
+ for _, v := range src {
+ dst = append(dst, v)
+ }
+ return dst
+}
+
+type Cmdable interface {
+ Pipeline() Pipeliner
+ Pipelined(fn func(Pipeliner) error) ([]Cmder, error)
+
+ TxPipelined(fn func(Pipeliner) error) ([]Cmder, error)
+ TxPipeline() Pipeliner
+
+ Command() *CommandsInfoCmd
+ ClientGetName() *StringCmd
+ Echo(message interface{}) *StringCmd
+ Ping() *StatusCmd
+ Quit() *StatusCmd
+ Del(keys ...string) *IntCmd
+ Unlink(keys ...string) *IntCmd
+ Dump(key string) *StringCmd
+ Exists(keys ...string) *IntCmd
+ Expire(key string, expiration time.Duration) *BoolCmd
+ ExpireAt(key string, tm time.Time) *BoolCmd
+ Keys(pattern string) *StringSliceCmd
+ Migrate(host, port, key string, db int64, timeout time.Duration) *StatusCmd
+ Move(key string, db int64) *BoolCmd
+ ObjectRefCount(key string) *IntCmd
+ ObjectEncoding(key string) *StringCmd
+ ObjectIdleTime(key string) *DurationCmd
+ Persist(key string) *BoolCmd
+ PExpire(key string, expiration time.Duration) *BoolCmd
+ PExpireAt(key string, tm time.Time) *BoolCmd
+ PTTL(key string) *DurationCmd
+ RandomKey() *StringCmd
+ Rename(key, newkey string) *StatusCmd
+ RenameNX(key, newkey string) *BoolCmd
+ Restore(key string, ttl time.Duration, value string) *StatusCmd
+ RestoreReplace(key string, ttl time.Duration, value string) *StatusCmd
+ Sort(key string, sort *Sort) *StringSliceCmd
+ SortStore(key, store string, sort *Sort) *IntCmd
+ SortInterfaces(key string, sort *Sort) *SliceCmd
+ Touch(keys ...string) *IntCmd
+ TTL(key string) *DurationCmd
+ Type(key string) *StatusCmd
+ Scan(cursor uint64, match string, count int64) *ScanCmd
+ SScan(key string, cursor uint64, match string, count int64) *ScanCmd
+ HScan(key string, cursor uint64, match string, count int64) *ScanCmd
+ ZScan(key string, cursor uint64, match string, count int64) *ScanCmd
+ Append(key, value string) *IntCmd
+ BitCount(key string, bitCount *BitCount) *IntCmd
+ BitOpAnd(destKey string, keys ...string) *IntCmd
+ BitOpOr(destKey string, keys ...string) *IntCmd
+ BitOpXor(destKey string, keys ...string) *IntCmd
+ BitOpNot(destKey string, key string) *IntCmd
+ BitPos(key string, bit int64, pos ...int64) *IntCmd
+ Decr(key string) *IntCmd
+ DecrBy(key string, decrement int64) *IntCmd
+ Get(key string) *StringCmd
+ GetBit(key string, offset int64) *IntCmd
+ GetRange(key string, start, end int64) *StringCmd
+ GetSet(key string, value interface{}) *StringCmd
+ Incr(key string) *IntCmd
+ IncrBy(key string, value int64) *IntCmd
+ IncrByFloat(key string, value float64) *FloatCmd
+ MGet(keys ...string) *SliceCmd
+ MSet(pairs ...interface{}) *StatusCmd
+ MSetNX(pairs ...interface{}) *BoolCmd
+ Set(key string, value interface{}, expiration time.Duration) *StatusCmd
+ SetBit(key string, offset int64, value int) *IntCmd
+ SetNX(key string, value interface{}, expiration time.Duration) *BoolCmd
+ SetXX(key string, value interface{}, expiration time.Duration) *BoolCmd
+ SetRange(key string, offset int64, value string) *IntCmd
+ StrLen(key string) *IntCmd
+ HDel(key string, fields ...string) *IntCmd
+ HExists(key, field string) *BoolCmd
+ HGet(key, field string) *StringCmd
+ HGetAll(key string) *StringStringMapCmd
+ HIncrBy(key, field string, incr int64) *IntCmd
+ HIncrByFloat(key, field string, incr float64) *FloatCmd
+ HKeys(key string) *StringSliceCmd
+ HLen(key string) *IntCmd
+ HMGet(key string, fields ...string) *SliceCmd
+ HMSet(key string, fields map[string]interface{}) *StatusCmd
+ HSet(key, field string, value interface{}) *BoolCmd
+ HSetNX(key, field string, value interface{}) *BoolCmd
+ HVals(key string) *StringSliceCmd
+ BLPop(timeout time.Duration, keys ...string) *StringSliceCmd
+ BRPop(timeout time.Duration, keys ...string) *StringSliceCmd
+ BRPopLPush(source, destination string, timeout time.Duration) *StringCmd
+ LIndex(key string, index int64) *StringCmd
+ LInsert(key, op string, pivot, value interface{}) *IntCmd
+ LInsertBefore(key string, pivot, value interface{}) *IntCmd
+ LInsertAfter(key string, pivot, value interface{}) *IntCmd
+ LLen(key string) *IntCmd
+ LPop(key string) *StringCmd
+ LPush(key string, values ...interface{}) *IntCmd
+ LPushX(key string, value interface{}) *IntCmd
+ LRange(key string, start, stop int64) *StringSliceCmd
+ LRem(key string, count int64, value interface{}) *IntCmd
+ LSet(key string, index int64, value interface{}) *StatusCmd
+ LTrim(key string, start, stop int64) *StatusCmd
+ RPop(key string) *StringCmd
+ RPopLPush(source, destination string) *StringCmd
+ RPush(key string, values ...interface{}) *IntCmd
+ RPushX(key string, value interface{}) *IntCmd
+ SAdd(key string, members ...interface{}) *IntCmd
+ SCard(key string) *IntCmd
+ SDiff(keys ...string) *StringSliceCmd
+ SDiffStore(destination string, keys ...string) *IntCmd
+ SInter(keys ...string) *StringSliceCmd
+ SInterStore(destination string, keys ...string) *IntCmd
+ SIsMember(key string, member interface{}) *BoolCmd
+ SMembers(key string) *StringSliceCmd
+ SMembersMap(key string) *StringStructMapCmd
+ SMove(source, destination string, member interface{}) *BoolCmd
+ SPop(key string) *StringCmd
+ SPopN(key string, count int64) *StringSliceCmd
+ SRandMember(key string) *StringCmd
+ SRandMemberN(key string, count int64) *StringSliceCmd
+ SRem(key string, members ...interface{}) *IntCmd
+ SUnion(keys ...string) *StringSliceCmd
+ SUnionStore(destination string, keys ...string) *IntCmd
+ XAdd(stream, id string, els map[string]interface{}) *StringCmd
+ XAddExt(opt *XAddExt) *StringCmd
+ XLen(key string) *IntCmd
+ XRange(stream, start, stop string) *XMessageSliceCmd
+ XRangeN(stream, start, stop string, count int64) *XMessageSliceCmd
+ XRevRange(stream string, start, stop string) *XMessageSliceCmd
+ XRevRangeN(stream string, start, stop string, count int64) *XMessageSliceCmd
+ XRead(streams ...string) *XStreamSliceCmd
+ XReadN(count int64, streams ...string) *XStreamSliceCmd
+ XReadExt(opt *XReadExt) *XStreamSliceCmd
+ ZAdd(key string, members ...Z) *IntCmd
+ ZAddNX(key string, members ...Z) *IntCmd
+ ZAddXX(key string, members ...Z) *IntCmd
+ ZAddCh(key string, members ...Z) *IntCmd
+ ZAddNXCh(key string, members ...Z) *IntCmd
+ ZAddXXCh(key string, members ...Z) *IntCmd
+ ZIncr(key string, member Z) *FloatCmd
+ ZIncrNX(key string, member Z) *FloatCmd
+ ZIncrXX(key string, member Z) *FloatCmd
+ ZCard(key string) *IntCmd
+ ZCount(key, min, max string) *IntCmd
+ ZLexCount(key, min, max string) *IntCmd
+ ZIncrBy(key string, increment float64, member string) *FloatCmd
+ ZInterStore(destination string, store ZStore, keys ...string) *IntCmd
+ ZRange(key string, start, stop int64) *StringSliceCmd
+ ZRangeWithScores(key string, start, stop int64) *ZSliceCmd
+ ZRangeByScore(key string, opt ZRangeBy) *StringSliceCmd
+ ZRangeByLex(key string, opt ZRangeBy) *StringSliceCmd
+ ZRangeByScoreWithScores(key string, opt ZRangeBy) *ZSliceCmd
+ ZRank(key, member string) *IntCmd
+ ZRem(key string, members ...interface{}) *IntCmd
+ ZRemRangeByRank(key string, start, stop int64) *IntCmd
+ ZRemRangeByScore(key, min, max string) *IntCmd
+ ZRemRangeByLex(key, min, max string) *IntCmd
+ ZRevRange(key string, start, stop int64) *StringSliceCmd
+ ZRevRangeWithScores(key string, start, stop int64) *ZSliceCmd
+ ZRevRangeByScore(key string, opt ZRangeBy) *StringSliceCmd
+ ZRevRangeByLex(key string, opt ZRangeBy) *StringSliceCmd
+ ZRevRangeByScoreWithScores(key string, opt ZRangeBy) *ZSliceCmd
+ ZRevRank(key, member string) *IntCmd
+ ZScore(key, member string) *FloatCmd
+ ZUnionStore(dest string, store ZStore, keys ...string) *IntCmd
+ PFAdd(key string, els ...interface{}) *IntCmd
+ PFCount(keys ...string) *IntCmd
+ PFMerge(dest string, keys ...string) *StatusCmd
+ BgRewriteAOF() *StatusCmd
+ BgSave() *StatusCmd
+ ClientKill(ipPort string) *StatusCmd
+ ClientKillByFilter(keys ...string) *IntCmd
+ ClientList() *StringCmd
+ ClientPause(dur time.Duration) *BoolCmd
+ ConfigGet(parameter string) *SliceCmd
+ ConfigResetStat() *StatusCmd
+ ConfigSet(parameter, value string) *StatusCmd
+ ConfigRewrite() *StatusCmd
+ DBSize() *IntCmd
+ FlushAll() *StatusCmd
+ FlushAllAsync() *StatusCmd
+ FlushDB() *StatusCmd
+ FlushDBAsync() *StatusCmd
+ Info(section ...string) *StringCmd
+ LastSave() *IntCmd
+ Save() *StatusCmd
+ Shutdown() *StatusCmd
+ ShutdownSave() *StatusCmd
+ ShutdownNoSave() *StatusCmd
+ SlaveOf(host, port string) *StatusCmd
+ Time() *TimeCmd
+ Eval(script string, keys []string, args ...interface{}) *Cmd
+ EvalSha(sha1 string, keys []string, args ...interface{}) *Cmd
+ ScriptExists(hashes ...string) *BoolSliceCmd
+ ScriptFlush() *StatusCmd
+ ScriptKill() *StatusCmd
+ ScriptLoad(script string) *StringCmd
+ DebugObject(key string) *StringCmd
+ Publish(channel string, message interface{}) *IntCmd
+ PubSubChannels(pattern string) *StringSliceCmd
+ PubSubNumSub(channels ...string) *StringIntMapCmd
+ PubSubNumPat() *IntCmd
+ ClusterSlots() *ClusterSlotsCmd
+ ClusterNodes() *StringCmd
+ ClusterMeet(host, port string) *StatusCmd
+ ClusterForget(nodeID string) *StatusCmd
+ ClusterReplicate(nodeID string) *StatusCmd
+ ClusterResetSoft() *StatusCmd
+ ClusterResetHard() *StatusCmd
+ ClusterInfo() *StringCmd
+ ClusterKeySlot(key string) *IntCmd
+ ClusterCountFailureReports(nodeID string) *IntCmd
+ ClusterCountKeysInSlot(slot int) *IntCmd
+ ClusterDelSlots(slots ...int) *StatusCmd
+ ClusterDelSlotsRange(min, max int) *StatusCmd
+ ClusterSaveConfig() *StatusCmd
+ ClusterSlaves(nodeID string) *StringSliceCmd
+ ClusterFailover() *StatusCmd
+ ClusterAddSlots(slots ...int) *StatusCmd
+ ClusterAddSlotsRange(min, max int) *StatusCmd
+ GeoAdd(key string, geoLocation ...*GeoLocation) *IntCmd
+ GeoPos(key string, members ...string) *GeoPosCmd
+ GeoRadius(key string, longitude, latitude float64, query *GeoRadiusQuery) *GeoLocationCmd
+ GeoRadiusRO(key string, longitude, latitude float64, query *GeoRadiusQuery) *GeoLocationCmd
+ GeoRadiusByMember(key, member string, query *GeoRadiusQuery) *GeoLocationCmd
+ GeoRadiusByMemberRO(key, member string, query *GeoRadiusQuery) *GeoLocationCmd
+ GeoDist(key string, member1, member2, unit string) *FloatCmd
+ GeoHash(key string, members ...string) *StringSliceCmd
+ ReadOnly() *StatusCmd
+ ReadWrite() *StatusCmd
+ MemoryUsage(key string, samples ...int) *IntCmd
+}
+
+type StatefulCmdable interface {
+ Cmdable
+ Auth(password string) *StatusCmd
+ Select(index int) *StatusCmd
+ SwapDB(index1, index2 int) *StatusCmd
+ ClientSetName(name string) *BoolCmd
+}
+
+var _ Cmdable = (*Client)(nil)
+var _ Cmdable = (*Tx)(nil)
+var _ Cmdable = (*Ring)(nil)
+var _ Cmdable = (*ClusterClient)(nil)
+
+type cmdable struct {
+ process func(cmd Cmder) error
+}
+
+func (c *cmdable) setProcessor(fn func(Cmder) error) {
+ c.process = fn
+}
+
+type statefulCmdable struct {
+ cmdable
+ process func(cmd Cmder) error
+}
+
+func (c *statefulCmdable) setProcessor(fn func(Cmder) error) {
+ c.process = fn
+ c.cmdable.setProcessor(fn)
+}
+
+//------------------------------------------------------------------------------
+
+func (c *statefulCmdable) Auth(password string) *StatusCmd {
+ cmd := NewStatusCmd("auth", password)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Echo(message interface{}) *StringCmd {
+ cmd := NewStringCmd("echo", message)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Ping() *StatusCmd {
+ cmd := NewStatusCmd("ping")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Wait(numSlaves int, timeout time.Duration) *IntCmd {
+ cmd := NewIntCmd("wait", numSlaves, int(timeout/time.Millisecond))
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Quit() *StatusCmd {
+ panic("not implemented")
+}
+
+func (c *statefulCmdable) Select(index int) *StatusCmd {
+ cmd := NewStatusCmd("select", index)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *statefulCmdable) SwapDB(index1, index2 int) *StatusCmd {
+ cmd := NewStatusCmd("swapdb", index1, index2)
+ c.process(cmd)
+ return cmd
+}
+
+//------------------------------------------------------------------------------
+
+func (c *cmdable) Command() *CommandsInfoCmd {
+ cmd := NewCommandsInfoCmd("command")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Del(keys ...string) *IntCmd {
+ args := make([]interface{}, 1+len(keys))
+ args[0] = "del"
+ for i, key := range keys {
+ args[1+i] = key
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Unlink(keys ...string) *IntCmd {
+ args := make([]interface{}, 1+len(keys))
+ args[0] = "unlink"
+ for i, key := range keys {
+ args[1+i] = key
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Dump(key string) *StringCmd {
+ cmd := NewStringCmd("dump", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Exists(keys ...string) *IntCmd {
+ args := make([]interface{}, 1+len(keys))
+ args[0] = "exists"
+ for i, key := range keys {
+ args[1+i] = key
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Expire(key string, expiration time.Duration) *BoolCmd {
+ cmd := NewBoolCmd("expire", key, formatSec(expiration))
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ExpireAt(key string, tm time.Time) *BoolCmd {
+ cmd := NewBoolCmd("expireat", key, tm.Unix())
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Keys(pattern string) *StringSliceCmd {
+ cmd := NewStringSliceCmd("keys", pattern)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Migrate(host, port, key string, db int64, timeout time.Duration) *StatusCmd {
+ cmd := NewStatusCmd(
+ "migrate",
+ host,
+ port,
+ key,
+ db,
+ formatMs(timeout),
+ )
+ cmd.setReadTimeout(timeout)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Move(key string, db int64) *BoolCmd {
+ cmd := NewBoolCmd("move", key, db)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ObjectRefCount(key string) *IntCmd {
+ cmd := NewIntCmd("object", "refcount", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ObjectEncoding(key string) *StringCmd {
+ cmd := NewStringCmd("object", "encoding", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ObjectIdleTime(key string) *DurationCmd {
+ cmd := NewDurationCmd(time.Second, "object", "idletime", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Persist(key string) *BoolCmd {
+ cmd := NewBoolCmd("persist", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) PExpire(key string, expiration time.Duration) *BoolCmd {
+ cmd := NewBoolCmd("pexpire", key, formatMs(expiration))
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) PExpireAt(key string, tm time.Time) *BoolCmd {
+ cmd := NewBoolCmd(
+ "pexpireat",
+ key,
+ tm.UnixNano()/int64(time.Millisecond),
+ )
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) PTTL(key string) *DurationCmd {
+ cmd := NewDurationCmd(time.Millisecond, "pttl", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) RandomKey() *StringCmd {
+ cmd := NewStringCmd("randomkey")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Rename(key, newkey string) *StatusCmd {
+ cmd := NewStatusCmd("rename", key, newkey)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) RenameNX(key, newkey string) *BoolCmd {
+ cmd := NewBoolCmd("renamenx", key, newkey)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Restore(key string, ttl time.Duration, value string) *StatusCmd {
+ cmd := NewStatusCmd(
+ "restore",
+ key,
+ formatMs(ttl),
+ value,
+ )
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) RestoreReplace(key string, ttl time.Duration, value string) *StatusCmd {
+ cmd := NewStatusCmd(
+ "restore",
+ key,
+ formatMs(ttl),
+ value,
+ "replace",
+ )
+ c.process(cmd)
+ return cmd
+}
+
+type Sort struct {
+ By string
+ Offset, Count int64
+ Get []string
+ Order string
+ Alpha bool
+}
+
+func (sort *Sort) args(key string) []interface{} {
+ args := []interface{}{"sort", key}
+ if sort.By != "" {
+ args = append(args, "by", sort.By)
+ }
+ if sort.Offset != 0 || sort.Count != 0 {
+ args = append(args, "limit", sort.Offset, sort.Count)
+ }
+ for _, get := range sort.Get {
+ args = append(args, "get", get)
+ }
+ if sort.Order != "" {
+ args = append(args, sort.Order)
+ }
+ if sort.Alpha {
+ args = append(args, "alpha")
+ }
+ return args
+}
+
+func (c *cmdable) Sort(key string, sort *Sort) *StringSliceCmd {
+ cmd := NewStringSliceCmd(sort.args(key)...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SortStore(key, store string, sort *Sort) *IntCmd {
+ args := sort.args(key)
+ if store != "" {
+ args = append(args, "store", store)
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SortInterfaces(key string, sort *Sort) *SliceCmd {
+ cmd := NewSliceCmd(sort.args(key)...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Touch(keys ...string) *IntCmd {
+ args := make([]interface{}, len(keys)+1)
+ args[0] = "touch"
+ for i, key := range keys {
+ args[i+1] = key
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) TTL(key string) *DurationCmd {
+ cmd := NewDurationCmd(time.Second, "ttl", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Type(key string) *StatusCmd {
+ cmd := NewStatusCmd("type", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Scan(cursor uint64, match string, count int64) *ScanCmd {
+ args := []interface{}{"scan", cursor}
+ if match != "" {
+ args = append(args, "match", match)
+ }
+ if count > 0 {
+ args = append(args, "count", count)
+ }
+ cmd := NewScanCmd(c.process, args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SScan(key string, cursor uint64, match string, count int64) *ScanCmd {
+ args := []interface{}{"sscan", key, cursor}
+ if match != "" {
+ args = append(args, "match", match)
+ }
+ if count > 0 {
+ args = append(args, "count", count)
+ }
+ cmd := NewScanCmd(c.process, args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) HScan(key string, cursor uint64, match string, count int64) *ScanCmd {
+ args := []interface{}{"hscan", key, cursor}
+ if match != "" {
+ args = append(args, "match", match)
+ }
+ if count > 0 {
+ args = append(args, "count", count)
+ }
+ cmd := NewScanCmd(c.process, args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZScan(key string, cursor uint64, match string, count int64) *ScanCmd {
+ args := []interface{}{"zscan", key, cursor}
+ if match != "" {
+ args = append(args, "match", match)
+ }
+ if count > 0 {
+ args = append(args, "count", count)
+ }
+ cmd := NewScanCmd(c.process, args...)
+ c.process(cmd)
+ return cmd
+}
+
+//------------------------------------------------------------------------------
+
+func (c *cmdable) Append(key, value string) *IntCmd {
+ cmd := NewIntCmd("append", key, value)
+ c.process(cmd)
+ return cmd
+}
+
+type BitCount struct {
+ Start, End int64
+}
+
+func (c *cmdable) BitCount(key string, bitCount *BitCount) *IntCmd {
+ args := []interface{}{"bitcount", key}
+ if bitCount != nil {
+ args = append(
+ args,
+ bitCount.Start,
+ bitCount.End,
+ )
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) bitOp(op, destKey string, keys ...string) *IntCmd {
+ args := make([]interface{}, 3+len(keys))
+ args[0] = "bitop"
+ args[1] = op
+ args[2] = destKey
+ for i, key := range keys {
+ args[3+i] = key
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) BitOpAnd(destKey string, keys ...string) *IntCmd {
+ return c.bitOp("and", destKey, keys...)
+}
+
+func (c *cmdable) BitOpOr(destKey string, keys ...string) *IntCmd {
+ return c.bitOp("or", destKey, keys...)
+}
+
+func (c *cmdable) BitOpXor(destKey string, keys ...string) *IntCmd {
+ return c.bitOp("xor", destKey, keys...)
+}
+
+func (c *cmdable) BitOpNot(destKey string, key string) *IntCmd {
+ return c.bitOp("not", destKey, key)
+}
+
+func (c *cmdable) BitPos(key string, bit int64, pos ...int64) *IntCmd {
+ args := make([]interface{}, 3+len(pos))
+ args[0] = "bitpos"
+ args[1] = key
+ args[2] = bit
+ switch len(pos) {
+ case 0:
+ case 1:
+ args[3] = pos[0]
+ case 2:
+ args[3] = pos[0]
+ args[4] = pos[1]
+ default:
+ panic("too many arguments")
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Decr(key string) *IntCmd {
+ cmd := NewIntCmd("decr", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) DecrBy(key string, decrement int64) *IntCmd {
+ cmd := NewIntCmd("decrby", key, decrement)
+ c.process(cmd)
+ return cmd
+}
+
+// Redis `GET key` command. It returns redis.Nil error when key does not exist.
+func (c *cmdable) Get(key string) *StringCmd {
+ cmd := NewStringCmd("get", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) GetBit(key string, offset int64) *IntCmd {
+ cmd := NewIntCmd("getbit", key, offset)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) GetRange(key string, start, end int64) *StringCmd {
+ cmd := NewStringCmd("getrange", key, start, end)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) GetSet(key string, value interface{}) *StringCmd {
+ cmd := NewStringCmd("getset", key, value)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Incr(key string) *IntCmd {
+ cmd := NewIntCmd("incr", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) IncrBy(key string, value int64) *IntCmd {
+ cmd := NewIntCmd("incrby", key, value)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) IncrByFloat(key string, value float64) *FloatCmd {
+ cmd := NewFloatCmd("incrbyfloat", key, value)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) MGet(keys ...string) *SliceCmd {
+ args := make([]interface{}, 1+len(keys))
+ args[0] = "mget"
+ for i, key := range keys {
+ args[1+i] = key
+ }
+ cmd := NewSliceCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) MSet(pairs ...interface{}) *StatusCmd {
+ args := make([]interface{}, 1, 1+len(pairs))
+ args[0] = "mset"
+ args = appendArgs(args, pairs)
+ cmd := NewStatusCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) MSetNX(pairs ...interface{}) *BoolCmd {
+ args := make([]interface{}, 1, 1+len(pairs))
+ args[0] = "msetnx"
+ args = appendArgs(args, pairs)
+ cmd := NewBoolCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+// Redis `SET key value [expiration]` command.
+//
+// Use expiration for `SETEX`-like behavior.
+// Zero expiration means the key has no expiration time.
+func (c *cmdable) Set(key string, value interface{}, expiration time.Duration) *StatusCmd {
+ args := make([]interface{}, 3, 4)
+ args[0] = "set"
+ args[1] = key
+ args[2] = value
+ if expiration > 0 {
+ if usePrecise(expiration) {
+ args = append(args, "px", formatMs(expiration))
+ } else {
+ args = append(args, "ex", formatSec(expiration))
+ }
+ }
+ cmd := NewStatusCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SetBit(key string, offset int64, value int) *IntCmd {
+ cmd := NewIntCmd(
+ "setbit",
+ key,
+ offset,
+ value,
+ )
+ c.process(cmd)
+ return cmd
+}
+
+// Redis `SET key value [expiration] NX` command.
+//
+// Zero expiration means the key has no expiration time.
+func (c *cmdable) SetNX(key string, value interface{}, expiration time.Duration) *BoolCmd {
+ var cmd *BoolCmd
+ if expiration == 0 {
+ // Use old `SETNX` to support old Redis versions.
+ cmd = NewBoolCmd("setnx", key, value)
+ } else {
+ if usePrecise(expiration) {
+ cmd = NewBoolCmd("set", key, value, "px", formatMs(expiration), "nx")
+ } else {
+ cmd = NewBoolCmd("set", key, value, "ex", formatSec(expiration), "nx")
+ }
+ }
+ c.process(cmd)
+ return cmd
+}
+
+// Redis `SET key value [expiration] XX` command.
+//
+// Zero expiration means the key has no expiration time.
+func (c *cmdable) SetXX(key string, value interface{}, expiration time.Duration) *BoolCmd {
+ var cmd *BoolCmd
+ if expiration == 0 {
+ cmd = NewBoolCmd("set", key, value, "xx")
+ } else {
+ if usePrecise(expiration) {
+ cmd = NewBoolCmd("set", key, value, "px", formatMs(expiration), "xx")
+ } else {
+ cmd = NewBoolCmd("set", key, value, "ex", formatSec(expiration), "xx")
+ }
+ }
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SetRange(key string, offset int64, value string) *IntCmd {
+ cmd := NewIntCmd("setrange", key, offset, value)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) StrLen(key string) *IntCmd {
+ cmd := NewIntCmd("strlen", key)
+ c.process(cmd)
+ return cmd
+}
+
+//------------------------------------------------------------------------------
+
+func (c *cmdable) HDel(key string, fields ...string) *IntCmd {
+ args := make([]interface{}, 2+len(fields))
+ args[0] = "hdel"
+ args[1] = key
+ for i, field := range fields {
+ args[2+i] = field
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) HExists(key, field string) *BoolCmd {
+ cmd := NewBoolCmd("hexists", key, field)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) HGet(key, field string) *StringCmd {
+ cmd := NewStringCmd("hget", key, field)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) HGetAll(key string) *StringStringMapCmd {
+ cmd := NewStringStringMapCmd("hgetall", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) HIncrBy(key, field string, incr int64) *IntCmd {
+ cmd := NewIntCmd("hincrby", key, field, incr)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) HIncrByFloat(key, field string, incr float64) *FloatCmd {
+ cmd := NewFloatCmd("hincrbyfloat", key, field, incr)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) HKeys(key string) *StringSliceCmd {
+ cmd := NewStringSliceCmd("hkeys", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) HLen(key string) *IntCmd {
+ cmd := NewIntCmd("hlen", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) HMGet(key string, fields ...string) *SliceCmd {
+ args := make([]interface{}, 2+len(fields))
+ args[0] = "hmget"
+ args[1] = key
+ for i, field := range fields {
+ args[2+i] = field
+ }
+ cmd := NewSliceCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) HMSet(key string, fields map[string]interface{}) *StatusCmd {
+ args := make([]interface{}, 2+len(fields)*2)
+ args[0] = "hmset"
+ args[1] = key
+ i := 2
+ for k, v := range fields {
+ args[i] = k
+ args[i+1] = v
+ i += 2
+ }
+ cmd := NewStatusCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) HSet(key, field string, value interface{}) *BoolCmd {
+ cmd := NewBoolCmd("hset", key, field, value)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) HSetNX(key, field string, value interface{}) *BoolCmd {
+ cmd := NewBoolCmd("hsetnx", key, field, value)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) HVals(key string) *StringSliceCmd {
+ cmd := NewStringSliceCmd("hvals", key)
+ c.process(cmd)
+ return cmd
+}
+
+//------------------------------------------------------------------------------
+
+func (c *cmdable) BLPop(timeout time.Duration, keys ...string) *StringSliceCmd {
+ args := make([]interface{}, 1+len(keys)+1)
+ args[0] = "blpop"
+ for i, key := range keys {
+ args[1+i] = key
+ }
+ args[len(args)-1] = formatSec(timeout)
+ cmd := NewStringSliceCmd(args...)
+ cmd.setReadTimeout(timeout)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) BRPop(timeout time.Duration, keys ...string) *StringSliceCmd {
+ args := make([]interface{}, 1+len(keys)+1)
+ args[0] = "brpop"
+ for i, key := range keys {
+ args[1+i] = key
+ }
+ args[len(keys)+1] = formatSec(timeout)
+ cmd := NewStringSliceCmd(args...)
+ cmd.setReadTimeout(timeout)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) BRPopLPush(source, destination string, timeout time.Duration) *StringCmd {
+ cmd := NewStringCmd(
+ "brpoplpush",
+ source,
+ destination,
+ formatSec(timeout),
+ )
+ cmd.setReadTimeout(timeout)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) LIndex(key string, index int64) *StringCmd {
+ cmd := NewStringCmd("lindex", key, index)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) LInsert(key, op string, pivot, value interface{}) *IntCmd {
+ cmd := NewIntCmd("linsert", key, op, pivot, value)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) LInsertBefore(key string, pivot, value interface{}) *IntCmd {
+ cmd := NewIntCmd("linsert", key, "before", pivot, value)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) LInsertAfter(key string, pivot, value interface{}) *IntCmd {
+ cmd := NewIntCmd("linsert", key, "after", pivot, value)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) LLen(key string) *IntCmd {
+ cmd := NewIntCmd("llen", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) LPop(key string) *StringCmd {
+ cmd := NewStringCmd("lpop", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) LPush(key string, values ...interface{}) *IntCmd {
+ args := make([]interface{}, 2, 2+len(values))
+ args[0] = "lpush"
+ args[1] = key
+ args = appendArgs(args, values)
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) LPushX(key string, value interface{}) *IntCmd {
+ cmd := NewIntCmd("lpushx", key, value)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) LRange(key string, start, stop int64) *StringSliceCmd {
+ cmd := NewStringSliceCmd(
+ "lrange",
+ key,
+ start,
+ stop,
+ )
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) LRem(key string, count int64, value interface{}) *IntCmd {
+ cmd := NewIntCmd("lrem", key, count, value)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) LSet(key string, index int64, value interface{}) *StatusCmd {
+ cmd := NewStatusCmd("lset", key, index, value)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) LTrim(key string, start, stop int64) *StatusCmd {
+ cmd := NewStatusCmd(
+ "ltrim",
+ key,
+ start,
+ stop,
+ )
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) RPop(key string) *StringCmd {
+ cmd := NewStringCmd("rpop", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) RPopLPush(source, destination string) *StringCmd {
+ cmd := NewStringCmd("rpoplpush", source, destination)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) RPush(key string, values ...interface{}) *IntCmd {
+ args := make([]interface{}, 2, 2+len(values))
+ args[0] = "rpush"
+ args[1] = key
+ args = appendArgs(args, values)
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) RPushX(key string, value interface{}) *IntCmd {
+ cmd := NewIntCmd("rpushx", key, value)
+ c.process(cmd)
+ return cmd
+}
+
+//------------------------------------------------------------------------------
+
+func (c *cmdable) SAdd(key string, members ...interface{}) *IntCmd {
+ args := make([]interface{}, 2, 2+len(members))
+ args[0] = "sadd"
+ args[1] = key
+ args = appendArgs(args, members)
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SCard(key string) *IntCmd {
+ cmd := NewIntCmd("scard", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SDiff(keys ...string) *StringSliceCmd {
+ args := make([]interface{}, 1+len(keys))
+ args[0] = "sdiff"
+ for i, key := range keys {
+ args[1+i] = key
+ }
+ cmd := NewStringSliceCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SDiffStore(destination string, keys ...string) *IntCmd {
+ args := make([]interface{}, 2+len(keys))
+ args[0] = "sdiffstore"
+ args[1] = destination
+ for i, key := range keys {
+ args[2+i] = key
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SInter(keys ...string) *StringSliceCmd {
+ args := make([]interface{}, 1+len(keys))
+ args[0] = "sinter"
+ for i, key := range keys {
+ args[1+i] = key
+ }
+ cmd := NewStringSliceCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SInterStore(destination string, keys ...string) *IntCmd {
+ args := make([]interface{}, 2+len(keys))
+ args[0] = "sinterstore"
+ args[1] = destination
+ for i, key := range keys {
+ args[2+i] = key
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SIsMember(key string, member interface{}) *BoolCmd {
+ cmd := NewBoolCmd("sismember", key, member)
+ c.process(cmd)
+ return cmd
+}
+
+// Redis `SMEMBERS key` command output as a slice
+func (c *cmdable) SMembers(key string) *StringSliceCmd {
+ cmd := NewStringSliceCmd("smembers", key)
+ c.process(cmd)
+ return cmd
+}
+
+// Redis `SMEMBERS key` command output as a map
+func (c *cmdable) SMembersMap(key string) *StringStructMapCmd {
+ cmd := NewStringStructMapCmd("smembers", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SMove(source, destination string, member interface{}) *BoolCmd {
+ cmd := NewBoolCmd("smove", source, destination, member)
+ c.process(cmd)
+ return cmd
+}
+
+// Redis `SPOP key` command.
+func (c *cmdable) SPop(key string) *StringCmd {
+ cmd := NewStringCmd("spop", key)
+ c.process(cmd)
+ return cmd
+}
+
+// Redis `SPOP key count` command.
+func (c *cmdable) SPopN(key string, count int64) *StringSliceCmd {
+ cmd := NewStringSliceCmd("spop", key, count)
+ c.process(cmd)
+ return cmd
+}
+
+// Redis `SRANDMEMBER key` command.
+func (c *cmdable) SRandMember(key string) *StringCmd {
+ cmd := NewStringCmd("srandmember", key)
+ c.process(cmd)
+ return cmd
+}
+
+// Redis `SRANDMEMBER key count` command.
+func (c *cmdable) SRandMemberN(key string, count int64) *StringSliceCmd {
+ cmd := NewStringSliceCmd("srandmember", key, count)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SRem(key string, members ...interface{}) *IntCmd {
+ args := make([]interface{}, 2, 2+len(members))
+ args[0] = "srem"
+ args[1] = key
+ args = appendArgs(args, members)
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SUnion(keys ...string) *StringSliceCmd {
+ args := make([]interface{}, 1+len(keys))
+ args[0] = "sunion"
+ for i, key := range keys {
+ args[1+i] = key
+ }
+ cmd := NewStringSliceCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SUnionStore(destination string, keys ...string) *IntCmd {
+ args := make([]interface{}, 2+len(keys))
+ args[0] = "sunionstore"
+ args[1] = destination
+ for i, key := range keys {
+ args[2+i] = key
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+//------------------------------------------------------------------------------
+
+type XAddExt struct {
+ Stream string
+ MaxLen int64 // MAXLEN N
+ MaxLenApprox int64 // MAXLEN ~ N
+ ID string
+ Values map[string]interface{}
+}
+
+func (c *cmdable) XAddExt(opt *XAddExt) *StringCmd {
+ a := make([]interface{}, 0, 6+len(opt.Values)*2)
+ a = append(a, "xadd")
+ a = append(a, opt.Stream)
+ if opt.MaxLen > 0 {
+ a = append(a, "maxlen", opt.MaxLen)
+ } else if opt.MaxLenApprox > 0 {
+ a = append(a, "maxlen", "~", opt.MaxLenApprox)
+ }
+ if opt.ID != "" {
+ a = append(a, opt.ID)
+ } else {
+ a = append(a, "*")
+ }
+ for k, v := range opt.Values {
+ a = append(a, k)
+ a = append(a, v)
+ }
+
+ cmd := NewStringCmd(a...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) XAdd(stream, id string, values map[string]interface{}) *StringCmd {
+ return c.XAddExt(&XAddExt{
+ Stream: stream,
+ ID: id,
+ Values: values,
+ })
+}
+
+func (c *cmdable) XLen(key string) *IntCmd {
+ cmd := NewIntCmd("xlen", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) XRange(stream, start, stop string) *XMessageSliceCmd {
+ cmd := NewXMessageSliceCmd("xrange", stream, start, stop)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) XRangeN(stream, start, stop string, count int64) *XMessageSliceCmd {
+ cmd := NewXMessageSliceCmd("xrange", stream, start, stop, "count", count)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) XRevRange(stream, start, stop string) *XMessageSliceCmd {
+ cmd := NewXMessageSliceCmd("xrevrange", stream, start, stop)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) XRevRangeN(stream, start, stop string, count int64) *XMessageSliceCmd {
+ cmd := NewXMessageSliceCmd("xrevrange", stream, start, stop, "count", count)
+ c.process(cmd)
+ return cmd
+}
+
+type XReadExt struct {
+ Streams []string
+ Count int64
+ Block time.Duration
+}
+
+func (c *cmdable) XReadExt(opt *XReadExt) *XStreamSliceCmd {
+ a := make([]interface{}, 0, 5+len(opt.Streams))
+ a = append(a, "xread")
+ if opt != nil {
+ if opt.Count > 0 {
+ a = append(a, "count")
+ a = append(a, opt.Count)
+ }
+ if opt.Block >= 0 {
+ a = append(a, "block")
+ a = append(a, int64(opt.Block/time.Millisecond))
+ }
+ }
+ a = append(a, "streams")
+ for _, s := range opt.Streams {
+ a = append(a, s)
+ }
+
+ cmd := NewXStreamSliceCmd(a...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) XRead(streams ...string) *XStreamSliceCmd {
+ return c.XReadExt(&XReadExt{
+ Streams: streams,
+ Block: -1,
+ })
+}
+
+func (c *cmdable) XReadN(count int64, streams ...string) *XStreamSliceCmd {
+ return c.XReadExt(&XReadExt{
+ Streams: streams,
+ Count: count,
+ Block: -1,
+ })
+}
+
+func (c *cmdable) XReadBlock(block time.Duration, streams ...string) *XStreamSliceCmd {
+ return c.XReadExt(&XReadExt{
+ Streams: streams,
+ Block: block,
+ })
+}
+
+//------------------------------------------------------------------------------
+
+// Z represents sorted set member.
+type Z struct {
+ Score float64
+ Member interface{}
+}
+
+// ZStore is used as an arg to ZInterStore and ZUnionStore.
+type ZStore struct {
+ Weights []float64
+ // Can be SUM, MIN or MAX.
+ Aggregate string
+}
+
+func (c *cmdable) zAdd(a []interface{}, n int, members ...Z) *IntCmd {
+ for i, m := range members {
+ a[n+2*i] = m.Score
+ a[n+2*i+1] = m.Member
+ }
+ cmd := NewIntCmd(a...)
+ c.process(cmd)
+ return cmd
+}
+
+// Redis `ZADD key score member [score member ...]` command.
+func (c *cmdable) ZAdd(key string, members ...Z) *IntCmd {
+ const n = 2
+ a := make([]interface{}, n+2*len(members))
+ a[0], a[1] = "zadd", key
+ return c.zAdd(a, n, members...)
+}
+
+// Redis `ZADD key NX score member [score member ...]` command.
+func (c *cmdable) ZAddNX(key string, members ...Z) *IntCmd {
+ const n = 3
+ a := make([]interface{}, n+2*len(members))
+ a[0], a[1], a[2] = "zadd", key, "nx"
+ return c.zAdd(a, n, members...)
+}
+
+// Redis `ZADD key XX score member [score member ...]` command.
+func (c *cmdable) ZAddXX(key string, members ...Z) *IntCmd {
+ const n = 3
+ a := make([]interface{}, n+2*len(members))
+ a[0], a[1], a[2] = "zadd", key, "xx"
+ return c.zAdd(a, n, members...)
+}
+
+// Redis `ZADD key CH score member [score member ...]` command.
+func (c *cmdable) ZAddCh(key string, members ...Z) *IntCmd {
+ const n = 3
+ a := make([]interface{}, n+2*len(members))
+ a[0], a[1], a[2] = "zadd", key, "ch"
+ return c.zAdd(a, n, members...)
+}
+
+// Redis `ZADD key NX CH score member [score member ...]` command.
+func (c *cmdable) ZAddNXCh(key string, members ...Z) *IntCmd {
+ const n = 4
+ a := make([]interface{}, n+2*len(members))
+ a[0], a[1], a[2], a[3] = "zadd", key, "nx", "ch"
+ return c.zAdd(a, n, members...)
+}
+
+// Redis `ZADD key XX CH score member [score member ...]` command.
+func (c *cmdable) ZAddXXCh(key string, members ...Z) *IntCmd {
+ const n = 4
+ a := make([]interface{}, n+2*len(members))
+ a[0], a[1], a[2], a[3] = "zadd", key, "xx", "ch"
+ return c.zAdd(a, n, members...)
+}
+
+func (c *cmdable) zIncr(a []interface{}, n int, members ...Z) *FloatCmd {
+ for i, m := range members {
+ a[n+2*i] = m.Score
+ a[n+2*i+1] = m.Member
+ }
+ cmd := NewFloatCmd(a...)
+ c.process(cmd)
+ return cmd
+}
+
+// Redis `ZADD key INCR score member` command.
+func (c *cmdable) ZIncr(key string, member Z) *FloatCmd {
+ const n = 3
+ a := make([]interface{}, n+2)
+ a[0], a[1], a[2] = "zadd", key, "incr"
+ return c.zIncr(a, n, member)
+}
+
+// Redis `ZADD key NX INCR score member` command.
+func (c *cmdable) ZIncrNX(key string, member Z) *FloatCmd {
+ const n = 4
+ a := make([]interface{}, n+2)
+ a[0], a[1], a[2], a[3] = "zadd", key, "incr", "nx"
+ return c.zIncr(a, n, member)
+}
+
+// Redis `ZADD key XX INCR score member` command.
+func (c *cmdable) ZIncrXX(key string, member Z) *FloatCmd {
+ const n = 4
+ a := make([]interface{}, n+2)
+ a[0], a[1], a[2], a[3] = "zadd", key, "incr", "xx"
+ return c.zIncr(a, n, member)
+}
+
+func (c *cmdable) ZCard(key string) *IntCmd {
+ cmd := NewIntCmd("zcard", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZCount(key, min, max string) *IntCmd {
+ cmd := NewIntCmd("zcount", key, min, max)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZLexCount(key, min, max string) *IntCmd {
+ cmd := NewIntCmd("zlexcount", key, min, max)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZIncrBy(key string, increment float64, member string) *FloatCmd {
+ cmd := NewFloatCmd("zincrby", key, increment, member)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZInterStore(destination string, store ZStore, keys ...string) *IntCmd {
+ args := make([]interface{}, 3+len(keys))
+ args[0] = "zinterstore"
+ args[1] = destination
+ args[2] = len(keys)
+ for i, key := range keys {
+ args[3+i] = key
+ }
+ if len(store.Weights) > 0 {
+ args = append(args, "weights")
+ for _, weight := range store.Weights {
+ args = append(args, weight)
+ }
+ }
+ if store.Aggregate != "" {
+ args = append(args, "aggregate", store.Aggregate)
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) zRange(key string, start, stop int64, withScores bool) *StringSliceCmd {
+ args := []interface{}{
+ "zrange",
+ key,
+ start,
+ stop,
+ }
+ if withScores {
+ args = append(args, "withscores")
+ }
+ cmd := NewStringSliceCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZRange(key string, start, stop int64) *StringSliceCmd {
+ return c.zRange(key, start, stop, false)
+}
+
+func (c *cmdable) ZRangeWithScores(key string, start, stop int64) *ZSliceCmd {
+ cmd := NewZSliceCmd("zrange", key, start, stop, "withscores")
+ c.process(cmd)
+ return cmd
+}
+
+type ZRangeBy struct {
+ Min, Max string
+ Offset, Count int64
+}
+
+func (c *cmdable) zRangeBy(zcmd, key string, opt ZRangeBy, withScores bool) *StringSliceCmd {
+ args := []interface{}{zcmd, key, opt.Min, opt.Max}
+ if withScores {
+ args = append(args, "withscores")
+ }
+ if opt.Offset != 0 || opt.Count != 0 {
+ args = append(
+ args,
+ "limit",
+ opt.Offset,
+ opt.Count,
+ )
+ }
+ cmd := NewStringSliceCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZRangeByScore(key string, opt ZRangeBy) *StringSliceCmd {
+ return c.zRangeBy("zrangebyscore", key, opt, false)
+}
+
+func (c *cmdable) ZRangeByLex(key string, opt ZRangeBy) *StringSliceCmd {
+ return c.zRangeBy("zrangebylex", key, opt, false)
+}
+
+func (c *cmdable) ZRangeByScoreWithScores(key string, opt ZRangeBy) *ZSliceCmd {
+ args := []interface{}{"zrangebyscore", key, opt.Min, opt.Max, "withscores"}
+ if opt.Offset != 0 || opt.Count != 0 {
+ args = append(
+ args,
+ "limit",
+ opt.Offset,
+ opt.Count,
+ )
+ }
+ cmd := NewZSliceCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZRank(key, member string) *IntCmd {
+ cmd := NewIntCmd("zrank", key, member)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZRem(key string, members ...interface{}) *IntCmd {
+ args := make([]interface{}, 2, 2+len(members))
+ args[0] = "zrem"
+ args[1] = key
+ args = appendArgs(args, members)
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZRemRangeByRank(key string, start, stop int64) *IntCmd {
+ cmd := NewIntCmd(
+ "zremrangebyrank",
+ key,
+ start,
+ stop,
+ )
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZRemRangeByScore(key, min, max string) *IntCmd {
+ cmd := NewIntCmd("zremrangebyscore", key, min, max)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZRemRangeByLex(key, min, max string) *IntCmd {
+ cmd := NewIntCmd("zremrangebylex", key, min, max)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZRevRange(key string, start, stop int64) *StringSliceCmd {
+ cmd := NewStringSliceCmd("zrevrange", key, start, stop)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZRevRangeWithScores(key string, start, stop int64) *ZSliceCmd {
+ cmd := NewZSliceCmd("zrevrange", key, start, stop, "withscores")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) zRevRangeBy(zcmd, key string, opt ZRangeBy) *StringSliceCmd {
+ args := []interface{}{zcmd, key, opt.Max, opt.Min}
+ if opt.Offset != 0 || opt.Count != 0 {
+ args = append(
+ args,
+ "limit",
+ opt.Offset,
+ opt.Count,
+ )
+ }
+ cmd := NewStringSliceCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZRevRangeByScore(key string, opt ZRangeBy) *StringSliceCmd {
+ return c.zRevRangeBy("zrevrangebyscore", key, opt)
+}
+
+func (c *cmdable) ZRevRangeByLex(key string, opt ZRangeBy) *StringSliceCmd {
+ return c.zRevRangeBy("zrevrangebylex", key, opt)
+}
+
+func (c *cmdable) ZRevRangeByScoreWithScores(key string, opt ZRangeBy) *ZSliceCmd {
+ args := []interface{}{"zrevrangebyscore", key, opt.Max, opt.Min, "withscores"}
+ if opt.Offset != 0 || opt.Count != 0 {
+ args = append(
+ args,
+ "limit",
+ opt.Offset,
+ opt.Count,
+ )
+ }
+ cmd := NewZSliceCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZRevRank(key, member string) *IntCmd {
+ cmd := NewIntCmd("zrevrank", key, member)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZScore(key, member string) *FloatCmd {
+ cmd := NewFloatCmd("zscore", key, member)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ZUnionStore(dest string, store ZStore, keys ...string) *IntCmd {
+ args := make([]interface{}, 3+len(keys))
+ args[0] = "zunionstore"
+ args[1] = dest
+ args[2] = len(keys)
+ for i, key := range keys {
+ args[3+i] = key
+ }
+ if len(store.Weights) > 0 {
+ args = append(args, "weights")
+ for _, weight := range store.Weights {
+ args = append(args, weight)
+ }
+ }
+ if store.Aggregate != "" {
+ args = append(args, "aggregate", store.Aggregate)
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+//------------------------------------------------------------------------------
+
+func (c *cmdable) PFAdd(key string, els ...interface{}) *IntCmd {
+ args := make([]interface{}, 2, 2+len(els))
+ args[0] = "pfadd"
+ args[1] = key
+ args = appendArgs(args, els)
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) PFCount(keys ...string) *IntCmd {
+ args := make([]interface{}, 1+len(keys))
+ args[0] = "pfcount"
+ for i, key := range keys {
+ args[1+i] = key
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) PFMerge(dest string, keys ...string) *StatusCmd {
+ args := make([]interface{}, 2+len(keys))
+ args[0] = "pfmerge"
+ args[1] = dest
+ for i, key := range keys {
+ args[2+i] = key
+ }
+ cmd := NewStatusCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+//------------------------------------------------------------------------------
+
+func (c *cmdable) BgRewriteAOF() *StatusCmd {
+ cmd := NewStatusCmd("bgrewriteaof")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) BgSave() *StatusCmd {
+ cmd := NewStatusCmd("bgsave")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClientKill(ipPort string) *StatusCmd {
+ cmd := NewStatusCmd("client", "kill", ipPort)
+ c.process(cmd)
+ return cmd
+}
+
+// ClientKillByFilter is new style synx, while the ClientKill is old
+// CLIENT KILL <option> [value] ... <option> [value]
+func (c *cmdable) ClientKillByFilter(keys ...string) *IntCmd {
+ args := make([]interface{}, 2+len(keys))
+ args[0] = "client"
+ args[1] = "kill"
+ for i, key := range keys {
+ args[2+i] = key
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClientList() *StringCmd {
+ cmd := NewStringCmd("client", "list")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClientPause(dur time.Duration) *BoolCmd {
+ cmd := NewBoolCmd("client", "pause", formatMs(dur))
+ c.process(cmd)
+ return cmd
+}
+
+// ClientSetName assigns a name to the connection.
+func (c *statefulCmdable) ClientSetName(name string) *BoolCmd {
+ cmd := NewBoolCmd("client", "setname", name)
+ c.process(cmd)
+ return cmd
+}
+
+// ClientGetName returns the name of the connection.
+func (c *cmdable) ClientGetName() *StringCmd {
+ cmd := NewStringCmd("client", "getname")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ConfigGet(parameter string) *SliceCmd {
+ cmd := NewSliceCmd("config", "get", parameter)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ConfigResetStat() *StatusCmd {
+ cmd := NewStatusCmd("config", "resetstat")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ConfigSet(parameter, value string) *StatusCmd {
+ cmd := NewStatusCmd("config", "set", parameter, value)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ConfigRewrite() *StatusCmd {
+ cmd := NewStatusCmd("config", "rewrite")
+ c.process(cmd)
+ return cmd
+}
+
+// Deperecated. Use DBSize instead.
+func (c *cmdable) DbSize() *IntCmd {
+ return c.DBSize()
+}
+
+func (c *cmdable) DBSize() *IntCmd {
+ cmd := NewIntCmd("dbsize")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) FlushAll() *StatusCmd {
+ cmd := NewStatusCmd("flushall")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) FlushAllAsync() *StatusCmd {
+ cmd := NewStatusCmd("flushall", "async")
+ c.process(cmd)
+ return cmd
+}
+
+// Deprecated. Use FlushDB instead.
+func (c *cmdable) FlushDb() *StatusCmd {
+ return c.FlushDB()
+}
+
+func (c *cmdable) FlushDB() *StatusCmd {
+ cmd := NewStatusCmd("flushdb")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) FlushDBAsync() *StatusCmd {
+ cmd := NewStatusCmd("flushdb", "async")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Info(section ...string) *StringCmd {
+ args := []interface{}{"info"}
+ if len(section) > 0 {
+ args = append(args, section[0])
+ }
+ cmd := NewStringCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) LastSave() *IntCmd {
+ cmd := NewIntCmd("lastsave")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) Save() *StatusCmd {
+ cmd := NewStatusCmd("save")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) shutdown(modifier string) *StatusCmd {
+ var args []interface{}
+ if modifier == "" {
+ args = []interface{}{"shutdown"}
+ } else {
+ args = []interface{}{"shutdown", modifier}
+ }
+ cmd := NewStatusCmd(args...)
+ c.process(cmd)
+ if err := cmd.Err(); err != nil {
+ if err == io.EOF {
+ // Server quit as expected.
+ cmd.err = nil
+ }
+ } else {
+ // Server did not quit. String reply contains the reason.
+ cmd.err = errors.New(cmd.val)
+ cmd.val = ""
+ }
+ return cmd
+}
+
+func (c *cmdable) Shutdown() *StatusCmd {
+ return c.shutdown("")
+}
+
+func (c *cmdable) ShutdownSave() *StatusCmd {
+ return c.shutdown("save")
+}
+
+func (c *cmdable) ShutdownNoSave() *StatusCmd {
+ return c.shutdown("nosave")
+}
+
+func (c *cmdable) SlaveOf(host, port string) *StatusCmd {
+ cmd := NewStatusCmd("slaveof", host, port)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) SlowLog() {
+ panic("not implemented")
+}
+
+func (c *cmdable) Sync() {
+ panic("not implemented")
+}
+
+func (c *cmdable) Time() *TimeCmd {
+ cmd := NewTimeCmd("time")
+ c.process(cmd)
+ return cmd
+}
+
+//------------------------------------------------------------------------------
+
+func (c *cmdable) Eval(script string, keys []string, args ...interface{}) *Cmd {
+ cmdArgs := make([]interface{}, 3+len(keys), 3+len(keys)+len(args))
+ cmdArgs[0] = "eval"
+ cmdArgs[1] = script
+ cmdArgs[2] = len(keys)
+ for i, key := range keys {
+ cmdArgs[3+i] = key
+ }
+ cmdArgs = appendArgs(cmdArgs, args)
+ cmd := NewCmd(cmdArgs...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) EvalSha(sha1 string, keys []string, args ...interface{}) *Cmd {
+ cmdArgs := make([]interface{}, 3+len(keys), 3+len(keys)+len(args))
+ cmdArgs[0] = "evalsha"
+ cmdArgs[1] = sha1
+ cmdArgs[2] = len(keys)
+ for i, key := range keys {
+ cmdArgs[3+i] = key
+ }
+ cmdArgs = appendArgs(cmdArgs, args)
+ cmd := NewCmd(cmdArgs...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ScriptExists(hashes ...string) *BoolSliceCmd {
+ args := make([]interface{}, 2+len(hashes))
+ args[0] = "script"
+ args[1] = "exists"
+ for i, hash := range hashes {
+ args[2+i] = hash
+ }
+ cmd := NewBoolSliceCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ScriptFlush() *StatusCmd {
+ cmd := NewStatusCmd("script", "flush")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ScriptKill() *StatusCmd {
+ cmd := NewStatusCmd("script", "kill")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ScriptLoad(script string) *StringCmd {
+ cmd := NewStringCmd("script", "load", script)
+ c.process(cmd)
+ return cmd
+}
+
+//------------------------------------------------------------------------------
+
+func (c *cmdable) DebugObject(key string) *StringCmd {
+ cmd := NewStringCmd("debug", "object", key)
+ c.process(cmd)
+ return cmd
+}
+
+//------------------------------------------------------------------------------
+
+// Publish posts the message to the channel.
+func (c *cmdable) Publish(channel string, message interface{}) *IntCmd {
+ cmd := NewIntCmd("publish", channel, message)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) PubSubChannels(pattern string) *StringSliceCmd {
+ args := []interface{}{"pubsub", "channels"}
+ if pattern != "*" {
+ args = append(args, pattern)
+ }
+ cmd := NewStringSliceCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) PubSubNumSub(channels ...string) *StringIntMapCmd {
+ args := make([]interface{}, 2+len(channels))
+ args[0] = "pubsub"
+ args[1] = "numsub"
+ for i, channel := range channels {
+ args[2+i] = channel
+ }
+ cmd := NewStringIntMapCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) PubSubNumPat() *IntCmd {
+ cmd := NewIntCmd("pubsub", "numpat")
+ c.process(cmd)
+ return cmd
+}
+
+//------------------------------------------------------------------------------
+
+func (c *cmdable) ClusterSlots() *ClusterSlotsCmd {
+ cmd := NewClusterSlotsCmd("cluster", "slots")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterNodes() *StringCmd {
+ cmd := NewStringCmd("cluster", "nodes")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterMeet(host, port string) *StatusCmd {
+ cmd := NewStatusCmd("cluster", "meet", host, port)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterForget(nodeID string) *StatusCmd {
+ cmd := NewStatusCmd("cluster", "forget", nodeID)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterReplicate(nodeID string) *StatusCmd {
+ cmd := NewStatusCmd("cluster", "replicate", nodeID)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterResetSoft() *StatusCmd {
+ cmd := NewStatusCmd("cluster", "reset", "soft")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterResetHard() *StatusCmd {
+ cmd := NewStatusCmd("cluster", "reset", "hard")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterInfo() *StringCmd {
+ cmd := NewStringCmd("cluster", "info")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterKeySlot(key string) *IntCmd {
+ cmd := NewIntCmd("cluster", "keyslot", key)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterCountFailureReports(nodeID string) *IntCmd {
+ cmd := NewIntCmd("cluster", "count-failure-reports", nodeID)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterCountKeysInSlot(slot int) *IntCmd {
+ cmd := NewIntCmd("cluster", "countkeysinslot", slot)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterDelSlots(slots ...int) *StatusCmd {
+ args := make([]interface{}, 2+len(slots))
+ args[0] = "cluster"
+ args[1] = "delslots"
+ for i, slot := range slots {
+ args[2+i] = slot
+ }
+ cmd := NewStatusCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterDelSlotsRange(min, max int) *StatusCmd {
+ size := max - min + 1
+ slots := make([]int, size)
+ for i := 0; i < size; i++ {
+ slots[i] = min + i
+ }
+ return c.ClusterDelSlots(slots...)
+}
+
+func (c *cmdable) ClusterSaveConfig() *StatusCmd {
+ cmd := NewStatusCmd("cluster", "saveconfig")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterSlaves(nodeID string) *StringSliceCmd {
+ cmd := NewStringSliceCmd("cluster", "slaves", nodeID)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ReadOnly() *StatusCmd {
+ cmd := NewStatusCmd("readonly")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ReadWrite() *StatusCmd {
+ cmd := NewStatusCmd("readwrite")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterFailover() *StatusCmd {
+ cmd := NewStatusCmd("cluster", "failover")
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterAddSlots(slots ...int) *StatusCmd {
+ args := make([]interface{}, 2+len(slots))
+ args[0] = "cluster"
+ args[1] = "addslots"
+ for i, num := range slots {
+ args[2+i] = num
+ }
+ cmd := NewStatusCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) ClusterAddSlotsRange(min, max int) *StatusCmd {
+ size := max - min + 1
+ slots := make([]int, size)
+ for i := 0; i < size; i++ {
+ slots[i] = min + i
+ }
+ return c.ClusterAddSlots(slots...)
+}
+
+//------------------------------------------------------------------------------
+
+func (c *cmdable) GeoAdd(key string, geoLocation ...*GeoLocation) *IntCmd {
+ args := make([]interface{}, 2+3*len(geoLocation))
+ args[0] = "geoadd"
+ args[1] = key
+ for i, eachLoc := range geoLocation {
+ args[2+3*i] = eachLoc.Longitude
+ args[2+3*i+1] = eachLoc.Latitude
+ args[2+3*i+2] = eachLoc.Name
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) GeoRadius(key string, longitude, latitude float64, query *GeoRadiusQuery) *GeoLocationCmd {
+ cmd := NewGeoLocationCmd(query, "georadius", key, longitude, latitude)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) GeoRadiusRO(key string, longitude, latitude float64, query *GeoRadiusQuery) *GeoLocationCmd {
+ cmd := NewGeoLocationCmd(query, "georadius_ro", key, longitude, latitude)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) GeoRadiusByMember(key, member string, query *GeoRadiusQuery) *GeoLocationCmd {
+ cmd := NewGeoLocationCmd(query, "georadiusbymember", key, member)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) GeoRadiusByMemberRO(key, member string, query *GeoRadiusQuery) *GeoLocationCmd {
+ cmd := NewGeoLocationCmd(query, "georadiusbymember_ro", key, member)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) GeoDist(key string, member1, member2, unit string) *FloatCmd {
+ if unit == "" {
+ unit = "km"
+ }
+ cmd := NewFloatCmd("geodist", key, member1, member2, unit)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) GeoHash(key string, members ...string) *StringSliceCmd {
+ args := make([]interface{}, 2+len(members))
+ args[0] = "geohash"
+ args[1] = key
+ for i, member := range members {
+ args[2+i] = member
+ }
+ cmd := NewStringSliceCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+func (c *cmdable) GeoPos(key string, members ...string) *GeoPosCmd {
+ args := make([]interface{}, 2+len(members))
+ args[0] = "geopos"
+ args[1] = key
+ for i, member := range members {
+ args[2+i] = member
+ }
+ cmd := NewGeoPosCmd(args...)
+ c.process(cmd)
+ return cmd
+}
+
+//------------------------------------------------------------------------------
+
+func (c *cmdable) MemoryUsage(key string, samples ...int) *IntCmd {
+ args := []interface{}{"memory", "usage", key}
+ if len(samples) > 0 {
+ if len(samples) != 1 {
+ panic("MemoryUsage expects single sample count")
+ }
+ args = append(args, "SAMPLES", samples[0])
+ }
+ cmd := NewIntCmd(args...)
+ c.process(cmd)
+ return cmd
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/doc.go b/src/dma/vendor/github.com/go-redis/redis/doc.go
new file mode 100644
index 00000000..55262533
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/doc.go
@@ -0,0 +1,4 @@
+/*
+Package redis implements a Redis client.
+*/
+package redis
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/consistenthash/consistenthash.go b/src/dma/vendor/github.com/go-redis/redis/internal/consistenthash/consistenthash.go
new file mode 100644
index 00000000..a9c56f07
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/consistenthash/consistenthash.go
@@ -0,0 +1,81 @@
+/*
+Copyright 2013 Google Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Package consistenthash provides an implementation of a ring hash.
+package consistenthash
+
+import (
+ "hash/crc32"
+ "sort"
+ "strconv"
+)
+
+type Hash func(data []byte) uint32
+
+type Map struct {
+ hash Hash
+ replicas int
+ keys []int // Sorted
+ hashMap map[int]string
+}
+
+func New(replicas int, fn Hash) *Map {
+ m := &Map{
+ replicas: replicas,
+ hash: fn,
+ hashMap: make(map[int]string),
+ }
+ if m.hash == nil {
+ m.hash = crc32.ChecksumIEEE
+ }
+ return m
+}
+
+// Returns true if there are no items available.
+func (m *Map) IsEmpty() bool {
+ return len(m.keys) == 0
+}
+
+// Adds some keys to the hash.
+func (m *Map) Add(keys ...string) {
+ for _, key := range keys {
+ for i := 0; i < m.replicas; i++ {
+ hash := int(m.hash([]byte(strconv.Itoa(i) + key)))
+ m.keys = append(m.keys, hash)
+ m.hashMap[hash] = key
+ }
+ }
+ sort.Ints(m.keys)
+}
+
+// Gets the closest item in the hash to the provided key.
+func (m *Map) Get(key string) string {
+ if m.IsEmpty() {
+ return ""
+ }
+
+ hash := int(m.hash([]byte(key)))
+
+ // Binary search for appropriate replica.
+ idx := sort.Search(len(m.keys), func(i int) bool { return m.keys[i] >= hash })
+
+ // Means we have cycled back to the first replica.
+ if idx == len(m.keys) {
+ idx = 0
+ }
+
+ return m.hashMap[m.keys[idx]]
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/error.go b/src/dma/vendor/github.com/go-redis/redis/internal/error.go
new file mode 100644
index 00000000..e0ff8632
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/error.go
@@ -0,0 +1,83 @@
+package internal
+
+import (
+ "io"
+ "net"
+ "strings"
+
+ "github.com/go-redis/redis/internal/proto"
+)
+
+func IsRetryableError(err error, retryNetError bool) bool {
+ if IsNetworkError(err) {
+ return retryNetError
+ }
+ s := err.Error()
+ if s == "ERR max number of clients reached" {
+ return true
+ }
+ if strings.HasPrefix(s, "LOADING ") {
+ return true
+ }
+ if strings.HasPrefix(s, "READONLY ") {
+ return true
+ }
+ if strings.HasPrefix(s, "CLUSTERDOWN ") {
+ return true
+ }
+ return false
+}
+
+func IsRedisError(err error) bool {
+ _, ok := err.(proto.RedisError)
+ return ok
+}
+
+func IsNetworkError(err error) bool {
+ if err == io.EOF {
+ return true
+ }
+ _, ok := err.(net.Error)
+ return ok
+}
+
+func IsBadConn(err error, allowTimeout bool) bool {
+ if err == nil {
+ return false
+ }
+ if IsRedisError(err) {
+ return strings.HasPrefix(err.Error(), "READONLY ")
+ }
+ if allowTimeout {
+ if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
+ return false
+ }
+ }
+ return true
+}
+
+func IsMovedError(err error) (moved bool, ask bool, addr string) {
+ if !IsRedisError(err) {
+ return
+ }
+
+ s := err.Error()
+ if strings.HasPrefix(s, "MOVED ") {
+ moved = true
+ } else if strings.HasPrefix(s, "ASK ") {
+ ask = true
+ } else {
+ return
+ }
+
+ ind := strings.LastIndex(s, " ")
+ if ind == -1 {
+ return false, false, ""
+ }
+ addr = s[ind+1:]
+ return
+}
+
+func IsLoadingError(err error) bool {
+ return strings.HasPrefix(err.Error(), "LOADING ")
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/hashtag/hashtag.go b/src/dma/vendor/github.com/go-redis/redis/internal/hashtag/hashtag.go
new file mode 100644
index 00000000..22f5b398
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/hashtag/hashtag.go
@@ -0,0 +1,77 @@
+package hashtag
+
+import (
+ "math/rand"
+ "strings"
+)
+
+const slotNumber = 16384
+
+// CRC16 implementation according to CCITT standards.
+// Copyright 2001-2010 Georges Menie (www.menie.org)
+// Copyright 2013 The Go Authors. All rights reserved.
+// http://redis.io/topics/cluster-spec#appendix-a-crc16-reference-implementation-in-ansi-c
+var crc16tab = [256]uint16{
+ 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
+ 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
+ 0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
+ 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
+ 0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
+ 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
+ 0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
+ 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
+ 0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
+ 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
+ 0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
+ 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
+ 0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
+ 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
+ 0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
+ 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
+ 0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
+ 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
+ 0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
+ 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
+ 0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
+ 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
+ 0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
+ 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
+ 0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
+ 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
+ 0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
+ 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
+ 0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
+ 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
+ 0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
+ 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0,
+}
+
+func Key(key string) string {
+ if s := strings.IndexByte(key, '{'); s > -1 {
+ if e := strings.IndexByte(key[s+1:], '}'); e > 0 {
+ return key[s+1 : s+e+1]
+ }
+ }
+ return key
+}
+
+func RandomSlot() int {
+ return rand.Intn(slotNumber)
+}
+
+// hashSlot returns a consistent slot number between 0 and 16383
+// for any given string key.
+func Slot(key string) int {
+ if key == "" {
+ return RandomSlot()
+ }
+ key = Key(key)
+ return int(crc16sum(key)) % slotNumber
+}
+
+func crc16sum(key string) (crc uint16) {
+ for i := 0; i < len(key); i++ {
+ crc = (crc << 8) ^ crc16tab[(byte(crc>>8)^key[i])&0x00ff]
+ }
+ return
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/internal.go b/src/dma/vendor/github.com/go-redis/redis/internal/internal.go
new file mode 100644
index 00000000..ad3fc3c9
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/internal.go
@@ -0,0 +1,24 @@
+package internal
+
+import (
+ "math/rand"
+ "time"
+)
+
+// Retry backoff with jitter sleep to prevent overloaded conditions during intervals
+// https://www.awsarchitectureblog.com/2015/03/backoff.html
+func RetryBackoff(retry int, minBackoff, maxBackoff time.Duration) time.Duration {
+ if retry < 0 {
+ retry = 0
+ }
+
+ backoff := minBackoff << uint(retry)
+ if backoff > maxBackoff || backoff < minBackoff {
+ backoff = maxBackoff
+ }
+
+ if backoff == 0 {
+ return 0
+ }
+ return time.Duration(rand.Int63n(int64(backoff)))
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/log.go b/src/dma/vendor/github.com/go-redis/redis/internal/log.go
new file mode 100644
index 00000000..fd14222e
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/log.go
@@ -0,0 +1,15 @@
+package internal
+
+import (
+ "fmt"
+ "log"
+)
+
+var Logger *log.Logger
+
+func Logf(s string, args ...interface{}) {
+ if Logger == nil {
+ return
+ }
+ Logger.Output(2, fmt.Sprintf(s, args...))
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/once.go b/src/dma/vendor/github.com/go-redis/redis/internal/once.go
new file mode 100644
index 00000000..64f46272
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/once.go
@@ -0,0 +1,60 @@
+/*
+Copyright 2014 The Camlistore Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package internal
+
+import (
+ "sync"
+ "sync/atomic"
+)
+
+// A Once will perform a successful action exactly once.
+//
+// Unlike a sync.Once, this Once's func returns an error
+// and is re-armed on failure.
+type Once struct {
+ m sync.Mutex
+ done uint32
+}
+
+// Do calls the function f if and only if Do has not been invoked
+// without error for this instance of Once. In other words, given
+// var once Once
+// if once.Do(f) is called multiple times, only the first call will
+// invoke f, even if f has a different value in each invocation unless
+// f returns an error. A new instance of Once is required for each
+// function to execute.
+//
+// Do is intended for initialization that must be run exactly once. Since f
+// is niladic, it may be necessary to use a function literal to capture the
+// arguments to a function to be invoked by Do:
+// err := config.once.Do(func() error { return config.init(filename) })
+func (o *Once) Do(f func() error) error {
+ if atomic.LoadUint32(&o.done) == 1 {
+ return nil
+ }
+ // Slow-path.
+ o.m.Lock()
+ defer o.m.Unlock()
+ var err error
+ if o.done == 0 {
+ err = f()
+ if err == nil {
+ atomic.StoreUint32(&o.done, 1)
+ }
+ }
+ return err
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/pool/conn.go b/src/dma/vendor/github.com/go-redis/redis/internal/pool/conn.go
new file mode 100644
index 00000000..acaf3665
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/pool/conn.go
@@ -0,0 +1,80 @@
+package pool
+
+import (
+ "net"
+ "sync/atomic"
+ "time"
+
+ "github.com/go-redis/redis/internal/proto"
+)
+
+var noDeadline = time.Time{}
+
+type Conn struct {
+ netConn net.Conn
+
+ Rd *proto.Reader
+ Wb *proto.WriteBuffer
+
+ Inited bool
+ usedAt atomic.Value
+}
+
+func NewConn(netConn net.Conn) *Conn {
+ cn := &Conn{
+ netConn: netConn,
+ Wb: proto.NewWriteBuffer(),
+ }
+ cn.Rd = proto.NewReader(cn.netConn)
+ cn.SetUsedAt(time.Now())
+ return cn
+}
+
+func (cn *Conn) UsedAt() time.Time {
+ return cn.usedAt.Load().(time.Time)
+}
+
+func (cn *Conn) SetUsedAt(tm time.Time) {
+ cn.usedAt.Store(tm)
+}
+
+func (cn *Conn) SetNetConn(netConn net.Conn) {
+ cn.netConn = netConn
+ cn.Rd.Reset(netConn)
+}
+
+func (cn *Conn) IsStale(timeout time.Duration) bool {
+ return timeout > 0 && time.Since(cn.UsedAt()) > timeout
+}
+
+func (cn *Conn) SetReadTimeout(timeout time.Duration) {
+ now := time.Now()
+ cn.SetUsedAt(now)
+ if timeout > 0 {
+ cn.netConn.SetReadDeadline(now.Add(timeout))
+ } else {
+ cn.netConn.SetReadDeadline(noDeadline)
+ }
+}
+
+func (cn *Conn) SetWriteTimeout(timeout time.Duration) {
+ now := time.Now()
+ cn.SetUsedAt(now)
+ if timeout > 0 {
+ cn.netConn.SetWriteDeadline(now.Add(timeout))
+ } else {
+ cn.netConn.SetWriteDeadline(noDeadline)
+ }
+}
+
+func (cn *Conn) Write(b []byte) (int, error) {
+ return cn.netConn.Write(b)
+}
+
+func (cn *Conn) RemoteAddr() net.Addr {
+ return cn.netConn.RemoteAddr()
+}
+
+func (cn *Conn) Close() error {
+ return cn.netConn.Close()
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/pool/pool.go b/src/dma/vendor/github.com/go-redis/redis/internal/pool/pool.go
new file mode 100644
index 00000000..cab66904
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/pool/pool.go
@@ -0,0 +1,416 @@
+package pool
+
+import (
+ "errors"
+ "net"
+ "sync"
+ "sync/atomic"
+ "time"
+
+ "github.com/go-redis/redis/internal"
+)
+
+var ErrClosed = errors.New("redis: client is closed")
+var ErrPoolTimeout = errors.New("redis: connection pool timeout")
+
+var timers = sync.Pool{
+ New: func() interface{} {
+ t := time.NewTimer(time.Hour)
+ t.Stop()
+ return t
+ },
+}
+
+// Stats contains pool state information and accumulated stats.
+type Stats struct {
+ Hits uint32 // number of times free connection was found in the pool
+ Misses uint32 // number of times free connection was NOT found in the pool
+ Timeouts uint32 // number of times a wait timeout occurred
+
+ TotalConns uint32 // number of total connections in the pool
+ FreeConns uint32 // deprecated - use IdleConns
+ IdleConns uint32 // number of idle connections in the pool
+ StaleConns uint32 // number of stale connections removed from the pool
+}
+
+type Pooler interface {
+ NewConn() (*Conn, error)
+ CloseConn(*Conn) error
+
+ Get() (*Conn, error)
+ Put(*Conn)
+ Remove(*Conn)
+
+ Len() int
+ IdleLen() int
+ Stats() *Stats
+
+ Close() error
+}
+
+type Options struct {
+ Dialer func() (net.Conn, error)
+ OnClose func(*Conn) error
+
+ PoolSize int
+ PoolTimeout time.Duration
+ IdleTimeout time.Duration
+ IdleCheckFrequency time.Duration
+}
+
+type ConnPool struct {
+ opt *Options
+
+ dialErrorsNum uint32 // atomic
+
+ lastDialError error
+ lastDialErrorMu sync.RWMutex
+
+ queue chan struct{}
+
+ connsMu sync.Mutex
+ conns []*Conn
+
+ idleConnsMu sync.RWMutex
+ idleConns []*Conn
+
+ stats Stats
+
+ _closed uint32 // atomic
+}
+
+var _ Pooler = (*ConnPool)(nil)
+
+func NewConnPool(opt *Options) *ConnPool {
+ p := &ConnPool{
+ opt: opt,
+
+ queue: make(chan struct{}, opt.PoolSize),
+ conns: make([]*Conn, 0, opt.PoolSize),
+ idleConns: make([]*Conn, 0, opt.PoolSize),
+ }
+
+ if opt.IdleTimeout > 0 && opt.IdleCheckFrequency > 0 {
+ go p.reaper(opt.IdleCheckFrequency)
+ }
+
+ return p
+}
+
+func (p *ConnPool) NewConn() (*Conn, error) {
+ cn, err := p.newConn()
+ if err != nil {
+ return nil, err
+ }
+
+ p.connsMu.Lock()
+ p.conns = append(p.conns, cn)
+ p.connsMu.Unlock()
+ return cn, nil
+}
+
+func (p *ConnPool) newConn() (*Conn, error) {
+ if p.closed() {
+ return nil, ErrClosed
+ }
+
+ if atomic.LoadUint32(&p.dialErrorsNum) >= uint32(p.opt.PoolSize) {
+ return nil, p.getLastDialError()
+ }
+
+ netConn, err := p.opt.Dialer()
+ if err != nil {
+ p.setLastDialError(err)
+ if atomic.AddUint32(&p.dialErrorsNum, 1) == uint32(p.opt.PoolSize) {
+ go p.tryDial()
+ }
+ return nil, err
+ }
+
+ return NewConn(netConn), nil
+}
+
+func (p *ConnPool) tryDial() {
+ for {
+ if p.closed() {
+ return
+ }
+
+ conn, err := p.opt.Dialer()
+ if err != nil {
+ p.setLastDialError(err)
+ time.Sleep(time.Second)
+ continue
+ }
+
+ atomic.StoreUint32(&p.dialErrorsNum, 0)
+ _ = conn.Close()
+ return
+ }
+}
+
+func (p *ConnPool) setLastDialError(err error) {
+ p.lastDialErrorMu.Lock()
+ p.lastDialError = err
+ p.lastDialErrorMu.Unlock()
+}
+
+func (p *ConnPool) getLastDialError() error {
+ p.lastDialErrorMu.RLock()
+ err := p.lastDialError
+ p.lastDialErrorMu.RUnlock()
+ return err
+}
+
+// Get returns existed connection from the pool or creates a new one.
+func (p *ConnPool) Get() (*Conn, error) {
+ if p.closed() {
+ return nil, ErrClosed
+ }
+
+ err := p.waitTurn()
+ if err != nil {
+ return nil, err
+ }
+
+ for {
+ p.idleConnsMu.Lock()
+ cn := p.popIdle()
+ p.idleConnsMu.Unlock()
+
+ if cn == nil {
+ break
+ }
+
+ if cn.IsStale(p.opt.IdleTimeout) {
+ p.CloseConn(cn)
+ continue
+ }
+
+ atomic.AddUint32(&p.stats.Hits, 1)
+ return cn, nil
+ }
+
+ atomic.AddUint32(&p.stats.Misses, 1)
+
+ newcn, err := p.NewConn()
+ if err != nil {
+ p.freeTurn()
+ return nil, err
+ }
+
+ return newcn, nil
+}
+
+func (p *ConnPool) getTurn() {
+ p.queue <- struct{}{}
+}
+
+func (p *ConnPool) waitTurn() error {
+ select {
+ case p.queue <- struct{}{}:
+ return nil
+ default:
+ timer := timers.Get().(*time.Timer)
+ timer.Reset(p.opt.PoolTimeout)
+
+ select {
+ case p.queue <- struct{}{}:
+ if !timer.Stop() {
+ <-timer.C
+ }
+ timers.Put(timer)
+ return nil
+ case <-timer.C:
+ timers.Put(timer)
+ atomic.AddUint32(&p.stats.Timeouts, 1)
+ return ErrPoolTimeout
+ }
+ }
+}
+
+func (p *ConnPool) freeTurn() {
+ <-p.queue
+}
+
+func (p *ConnPool) popIdle() *Conn {
+ if len(p.idleConns) == 0 {
+ return nil
+ }
+
+ idx := len(p.idleConns) - 1
+ cn := p.idleConns[idx]
+ p.idleConns = p.idleConns[:idx]
+
+ return cn
+}
+
+func (p *ConnPool) Put(cn *Conn) {
+ buf := cn.Rd.PeekBuffered()
+ if buf != nil {
+ internal.Logf("connection has unread data: %.100q", buf)
+ p.Remove(cn)
+ return
+ }
+
+ p.idleConnsMu.Lock()
+ p.idleConns = append(p.idleConns, cn)
+ p.idleConnsMu.Unlock()
+ p.freeTurn()
+}
+
+func (p *ConnPool) Remove(cn *Conn) {
+ p.removeConn(cn)
+ p.freeTurn()
+ _ = p.closeConn(cn)
+}
+
+func (p *ConnPool) CloseConn(cn *Conn) error {
+ p.removeConn(cn)
+ return p.closeConn(cn)
+}
+
+func (p *ConnPool) removeConn(cn *Conn) {
+ p.connsMu.Lock()
+ for i, c := range p.conns {
+ if c == cn {
+ p.conns = append(p.conns[:i], p.conns[i+1:]...)
+ break
+ }
+ }
+ p.connsMu.Unlock()
+}
+
+func (p *ConnPool) closeConn(cn *Conn) error {
+ if p.opt.OnClose != nil {
+ _ = p.opt.OnClose(cn)
+ }
+ return cn.Close()
+}
+
+// Len returns total number of connections.
+func (p *ConnPool) Len() int {
+ p.connsMu.Lock()
+ l := len(p.conns)
+ p.connsMu.Unlock()
+ return l
+}
+
+// FreeLen returns number of idle connections.
+func (p *ConnPool) IdleLen() int {
+ p.idleConnsMu.RLock()
+ l := len(p.idleConns)
+ p.idleConnsMu.RUnlock()
+ return l
+}
+
+func (p *ConnPool) Stats() *Stats {
+ idleLen := p.IdleLen()
+ return &Stats{
+ Hits: atomic.LoadUint32(&p.stats.Hits),
+ Misses: atomic.LoadUint32(&p.stats.Misses),
+ Timeouts: atomic.LoadUint32(&p.stats.Timeouts),
+
+ TotalConns: uint32(p.Len()),
+ FreeConns: uint32(idleLen),
+ IdleConns: uint32(idleLen),
+ StaleConns: atomic.LoadUint32(&p.stats.StaleConns),
+ }
+}
+
+func (p *ConnPool) closed() bool {
+ return atomic.LoadUint32(&p._closed) == 1
+}
+
+func (p *ConnPool) Filter(fn func(*Conn) bool) error {
+ var firstErr error
+ p.connsMu.Lock()
+ for _, cn := range p.conns {
+ if fn(cn) {
+ if err := p.closeConn(cn); err != nil && firstErr == nil {
+ firstErr = err
+ }
+ }
+ }
+ p.connsMu.Unlock()
+ return firstErr
+}
+
+func (p *ConnPool) Close() error {
+ if !atomic.CompareAndSwapUint32(&p._closed, 0, 1) {
+ return ErrClosed
+ }
+
+ var firstErr error
+ p.connsMu.Lock()
+ for _, cn := range p.conns {
+ if err := p.closeConn(cn); err != nil && firstErr == nil {
+ firstErr = err
+ }
+ }
+ p.conns = nil
+ p.connsMu.Unlock()
+
+ p.idleConnsMu.Lock()
+ p.idleConns = nil
+ p.idleConnsMu.Unlock()
+
+ return firstErr
+}
+
+func (p *ConnPool) reapStaleConn() *Conn {
+ if len(p.idleConns) == 0 {
+ return nil
+ }
+
+ cn := p.idleConns[0]
+ if !cn.IsStale(p.opt.IdleTimeout) {
+ return nil
+ }
+
+ p.idleConns = append(p.idleConns[:0], p.idleConns[1:]...)
+
+ return cn
+}
+
+func (p *ConnPool) ReapStaleConns() (int, error) {
+ var n int
+ for {
+ p.getTurn()
+
+ p.idleConnsMu.Lock()
+ cn := p.reapStaleConn()
+ p.idleConnsMu.Unlock()
+
+ if cn != nil {
+ p.removeConn(cn)
+ }
+
+ p.freeTurn()
+
+ if cn != nil {
+ p.closeConn(cn)
+ n++
+ } else {
+ break
+ }
+ }
+ return n, nil
+}
+
+func (p *ConnPool) reaper(frequency time.Duration) {
+ ticker := time.NewTicker(frequency)
+ defer ticker.Stop()
+
+ for range ticker.C {
+ if p.closed() {
+ break
+ }
+ n, err := p.ReapStaleConns()
+ if err != nil {
+ internal.Logf("ReapStaleConns failed: %s", err)
+ continue
+ }
+ atomic.AddUint32(&p.stats.StaleConns, uint32(n))
+ }
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/pool/pool_single.go b/src/dma/vendor/github.com/go-redis/redis/internal/pool/pool_single.go
new file mode 100644
index 00000000..b35b78af
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/pool/pool_single.go
@@ -0,0 +1,53 @@
+package pool
+
+type SingleConnPool struct {
+ cn *Conn
+}
+
+var _ Pooler = (*SingleConnPool)(nil)
+
+func NewSingleConnPool(cn *Conn) *SingleConnPool {
+ return &SingleConnPool{
+ cn: cn,
+ }
+}
+
+func (p *SingleConnPool) NewConn() (*Conn, error) {
+ panic("not implemented")
+}
+
+func (p *SingleConnPool) CloseConn(*Conn) error {
+ panic("not implemented")
+}
+
+func (p *SingleConnPool) Get() (*Conn, error) {
+ return p.cn, nil
+}
+
+func (p *SingleConnPool) Put(cn *Conn) {
+ if p.cn != cn {
+ panic("p.cn != cn")
+ }
+}
+
+func (p *SingleConnPool) Remove(cn *Conn) {
+ if p.cn != cn {
+ panic("p.cn != cn")
+ }
+}
+
+func (p *SingleConnPool) Len() int {
+ return 1
+}
+
+func (p *SingleConnPool) IdleLen() int {
+ return 0
+}
+
+func (p *SingleConnPool) Stats() *Stats {
+ return nil
+}
+
+func (p *SingleConnPool) Close() error {
+ return nil
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/pool/pool_sticky.go b/src/dma/vendor/github.com/go-redis/redis/internal/pool/pool_sticky.go
new file mode 100644
index 00000000..91bd9133
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/pool/pool_sticky.go
@@ -0,0 +1,109 @@
+package pool
+
+import "sync"
+
+type StickyConnPool struct {
+ pool *ConnPool
+ reusable bool
+
+ cn *Conn
+ closed bool
+ mu sync.Mutex
+}
+
+var _ Pooler = (*StickyConnPool)(nil)
+
+func NewStickyConnPool(pool *ConnPool, reusable bool) *StickyConnPool {
+ return &StickyConnPool{
+ pool: pool,
+ reusable: reusable,
+ }
+}
+
+func (p *StickyConnPool) NewConn() (*Conn, error) {
+ panic("not implemented")
+}
+
+func (p *StickyConnPool) CloseConn(*Conn) error {
+ panic("not implemented")
+}
+
+func (p *StickyConnPool) Get() (*Conn, error) {
+ p.mu.Lock()
+ defer p.mu.Unlock()
+
+ if p.closed {
+ return nil, ErrClosed
+ }
+ if p.cn != nil {
+ return p.cn, nil
+ }
+
+ cn, err := p.pool.Get()
+ if err != nil {
+ return nil, err
+ }
+
+ p.cn = cn
+ return cn, nil
+}
+
+func (p *StickyConnPool) putUpstream() {
+ p.pool.Put(p.cn)
+ p.cn = nil
+}
+
+func (p *StickyConnPool) Put(cn *Conn) {}
+
+func (p *StickyConnPool) removeUpstream() {
+ p.pool.Remove(p.cn)
+ p.cn = nil
+}
+
+func (p *StickyConnPool) Remove(cn *Conn) {
+ p.removeUpstream()
+}
+
+func (p *StickyConnPool) Len() int {
+ p.mu.Lock()
+ defer p.mu.Unlock()
+
+ if p.cn == nil {
+ return 0
+ }
+ return 1
+}
+
+func (p *StickyConnPool) IdleLen() int {
+ p.mu.Lock()
+ defer p.mu.Unlock()
+
+ if p.cn == nil {
+ return 1
+ }
+ return 0
+}
+
+func (p *StickyConnPool) Stats() *Stats {
+ return nil
+}
+
+func (p *StickyConnPool) Close() error {
+ p.mu.Lock()
+ defer p.mu.Unlock()
+
+ if p.closed {
+ return ErrClosed
+ }
+ p.closed = true
+
+ if p.cn != nil {
+ if p.reusable {
+ p.putUpstream()
+ } else {
+ p.removeUpstream()
+ }
+ }
+
+ return nil
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/proto/reader.go b/src/dma/vendor/github.com/go-redis/redis/internal/proto/reader.go
new file mode 100644
index 00000000..8c28c7b7
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/proto/reader.go
@@ -0,0 +1,316 @@
+package proto
+
+import (
+ "bufio"
+ "fmt"
+ "io"
+ "strconv"
+
+ "github.com/go-redis/redis/internal/util"
+)
+
+const bytesAllocLimit = 1024 * 1024 // 1mb
+
+const (
+ ErrorReply = '-'
+ StatusReply = '+'
+ IntReply = ':'
+ StringReply = '$'
+ ArrayReply = '*'
+)
+
+//------------------------------------------------------------------------------
+
+const Nil = RedisError("redis: nil")
+
+type RedisError string
+
+func (e RedisError) Error() string { return string(e) }
+
+//------------------------------------------------------------------------------
+
+type MultiBulkParse func(*Reader, int64) (interface{}, error)
+
+type Reader struct {
+ src *bufio.Reader
+ buf []byte
+}
+
+func NewReader(rd io.Reader) *Reader {
+ return &Reader{
+ src: bufio.NewReader(rd),
+ buf: make([]byte, 4096),
+ }
+}
+
+func (r *Reader) Reset(rd io.Reader) {
+ r.src.Reset(rd)
+}
+
+func (r *Reader) PeekBuffered() []byte {
+ if n := r.src.Buffered(); n != 0 {
+ b, _ := r.src.Peek(n)
+ return b
+ }
+ return nil
+}
+
+func (r *Reader) ReadN(n int) ([]byte, error) {
+ b, err := readN(r.src, r.buf, n)
+ if err != nil {
+ return nil, err
+ }
+ r.buf = b
+ return b, nil
+}
+
+func (r *Reader) ReadLine() ([]byte, error) {
+ line, isPrefix, err := r.src.ReadLine()
+ if err != nil {
+ return nil, err
+ }
+ if isPrefix {
+ return nil, bufio.ErrBufferFull
+ }
+ if len(line) == 0 {
+ return nil, fmt.Errorf("redis: reply is empty")
+ }
+ if isNilReply(line) {
+ return nil, Nil
+ }
+ return line, nil
+}
+
+func (r *Reader) ReadReply(m MultiBulkParse) (interface{}, error) {
+ line, err := r.ReadLine()
+ if err != nil {
+ return nil, err
+ }
+
+ switch line[0] {
+ case ErrorReply:
+ return nil, ParseErrorReply(line)
+ case StatusReply:
+ return parseTmpStatusReply(line), nil
+ case IntReply:
+ return util.ParseInt(line[1:], 10, 64)
+ case StringReply:
+ return r.readTmpBytesReply(line)
+ case ArrayReply:
+ n, err := parseArrayLen(line)
+ if err != nil {
+ return nil, err
+ }
+ return m(r, n)
+ }
+ return nil, fmt.Errorf("redis: can't parse %.100q", line)
+}
+
+func (r *Reader) ReadIntReply() (int64, error) {
+ line, err := r.ReadLine()
+ if err != nil {
+ return 0, err
+ }
+ switch line[0] {
+ case ErrorReply:
+ return 0, ParseErrorReply(line)
+ case IntReply:
+ return util.ParseInt(line[1:], 10, 64)
+ default:
+ return 0, fmt.Errorf("redis: can't parse int reply: %.100q", line)
+ }
+}
+
+func (r *Reader) ReadTmpBytesReply() ([]byte, error) {
+ line, err := r.ReadLine()
+ if err != nil {
+ return nil, err
+ }
+ switch line[0] {
+ case ErrorReply:
+ return nil, ParseErrorReply(line)
+ case StringReply:
+ return r.readTmpBytesReply(line)
+ case StatusReply:
+ return parseTmpStatusReply(line), nil
+ default:
+ return nil, fmt.Errorf("redis: can't parse string reply: %.100q", line)
+ }
+}
+
+func (r *Reader) ReadBytesReply() ([]byte, error) {
+ b, err := r.ReadTmpBytesReply()
+ if err != nil {
+ return nil, err
+ }
+ cp := make([]byte, len(b))
+ copy(cp, b)
+ return cp, nil
+}
+
+func (r *Reader) ReadStringReply() (string, error) {
+ b, err := r.ReadTmpBytesReply()
+ if err != nil {
+ return "", err
+ }
+ return string(b), nil
+}
+
+func (r *Reader) ReadFloatReply() (float64, error) {
+ b, err := r.ReadTmpBytesReply()
+ if err != nil {
+ return 0, err
+ }
+ return util.ParseFloat(b, 64)
+}
+
+func (r *Reader) ReadArrayReply(m MultiBulkParse) (interface{}, error) {
+ line, err := r.ReadLine()
+ if err != nil {
+ return nil, err
+ }
+ switch line[0] {
+ case ErrorReply:
+ return nil, ParseErrorReply(line)
+ case ArrayReply:
+ n, err := parseArrayLen(line)
+ if err != nil {
+ return nil, err
+ }
+ return m(r, n)
+ default:
+ return nil, fmt.Errorf("redis: can't parse array reply: %.100q", line)
+ }
+}
+
+func (r *Reader) ReadArrayLen() (int64, error) {
+ line, err := r.ReadLine()
+ if err != nil {
+ return 0, err
+ }
+ switch line[0] {
+ case ErrorReply:
+ return 0, ParseErrorReply(line)
+ case ArrayReply:
+ return parseArrayLen(line)
+ default:
+ return 0, fmt.Errorf("redis: can't parse array reply: %.100q", line)
+ }
+}
+
+func (r *Reader) ReadScanReply() ([]string, uint64, error) {
+ n, err := r.ReadArrayLen()
+ if err != nil {
+ return nil, 0, err
+ }
+ if n != 2 {
+ return nil, 0, fmt.Errorf("redis: got %d elements in scan reply, expected 2", n)
+ }
+
+ cursor, err := r.ReadUint()
+ if err != nil {
+ return nil, 0, err
+ }
+
+ n, err = r.ReadArrayLen()
+ if err != nil {
+ return nil, 0, err
+ }
+
+ keys := make([]string, n)
+ for i := int64(0); i < n; i++ {
+ key, err := r.ReadStringReply()
+ if err != nil {
+ return nil, 0, err
+ }
+ keys[i] = key
+ }
+
+ return keys, cursor, err
+}
+
+func (r *Reader) readTmpBytesReply(line []byte) ([]byte, error) {
+ if isNilReply(line) {
+ return nil, Nil
+ }
+
+ replyLen, err := strconv.Atoi(string(line[1:]))
+ if err != nil {
+ return nil, err
+ }
+
+ b, err := r.ReadN(replyLen + 2)
+ if err != nil {
+ return nil, err
+ }
+ return b[:replyLen], nil
+}
+
+func (r *Reader) ReadInt() (int64, error) {
+ b, err := r.ReadTmpBytesReply()
+ if err != nil {
+ return 0, err
+ }
+ return util.ParseInt(b, 10, 64)
+}
+
+func (r *Reader) ReadUint() (uint64, error) {
+ b, err := r.ReadTmpBytesReply()
+ if err != nil {
+ return 0, err
+ }
+ return util.ParseUint(b, 10, 64)
+}
+
+// --------------------------------------------------------------------
+
+func readN(r io.Reader, b []byte, n int) ([]byte, error) {
+ if n == 0 && b == nil {
+ return make([]byte, 0), nil
+ }
+
+ if cap(b) >= n {
+ b = b[:n]
+ _, err := io.ReadFull(r, b)
+ return b, err
+ }
+ b = b[:cap(b)]
+
+ pos := 0
+ for pos < n {
+ diff := n - len(b)
+ if diff > bytesAllocLimit {
+ diff = bytesAllocLimit
+ }
+ b = append(b, make([]byte, diff)...)
+
+ nn, err := io.ReadFull(r, b[pos:])
+ if err != nil {
+ return nil, err
+ }
+ pos += nn
+ }
+
+ return b, nil
+}
+
+func isNilReply(b []byte) bool {
+ return len(b) == 3 &&
+ (b[0] == StringReply || b[0] == ArrayReply) &&
+ b[1] == '-' && b[2] == '1'
+}
+
+func ParseErrorReply(line []byte) error {
+ return RedisError(string(line[1:]))
+}
+
+func parseTmpStatusReply(line []byte) []byte {
+ return line[1:]
+}
+
+func parseArrayLen(line []byte) (int64, error) {
+ if isNilReply(line) {
+ return 0, Nil
+ }
+ return util.ParseInt(line[1:], 10, 64)
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/proto/scan.go b/src/dma/vendor/github.com/go-redis/redis/internal/proto/scan.go
new file mode 100644
index 00000000..3bdb33f9
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/proto/scan.go
@@ -0,0 +1,166 @@
+package proto
+
+import (
+ "encoding"
+ "fmt"
+ "reflect"
+
+ "github.com/go-redis/redis/internal/util"
+)
+
+func Scan(b []byte, v interface{}) error {
+ switch v := v.(type) {
+ case nil:
+ return fmt.Errorf("redis: Scan(nil)")
+ case *string:
+ *v = util.BytesToString(b)
+ return nil
+ case *[]byte:
+ *v = b
+ return nil
+ case *int:
+ var err error
+ *v, err = util.Atoi(b)
+ return err
+ case *int8:
+ n, err := util.ParseInt(b, 10, 8)
+ if err != nil {
+ return err
+ }
+ *v = int8(n)
+ return nil
+ case *int16:
+ n, err := util.ParseInt(b, 10, 16)
+ if err != nil {
+ return err
+ }
+ *v = int16(n)
+ return nil
+ case *int32:
+ n, err := util.ParseInt(b, 10, 32)
+ if err != nil {
+ return err
+ }
+ *v = int32(n)
+ return nil
+ case *int64:
+ n, err := util.ParseInt(b, 10, 64)
+ if err != nil {
+ return err
+ }
+ *v = n
+ return nil
+ case *uint:
+ n, err := util.ParseUint(b, 10, 64)
+ if err != nil {
+ return err
+ }
+ *v = uint(n)
+ return nil
+ case *uint8:
+ n, err := util.ParseUint(b, 10, 8)
+ if err != nil {
+ return err
+ }
+ *v = uint8(n)
+ return nil
+ case *uint16:
+ n, err := util.ParseUint(b, 10, 16)
+ if err != nil {
+ return err
+ }
+ *v = uint16(n)
+ return nil
+ case *uint32:
+ n, err := util.ParseUint(b, 10, 32)
+ if err != nil {
+ return err
+ }
+ *v = uint32(n)
+ return nil
+ case *uint64:
+ n, err := util.ParseUint(b, 10, 64)
+ if err != nil {
+ return err
+ }
+ *v = n
+ return nil
+ case *float32:
+ n, err := util.ParseFloat(b, 32)
+ if err != nil {
+ return err
+ }
+ *v = float32(n)
+ return err
+ case *float64:
+ var err error
+ *v, err = util.ParseFloat(b, 64)
+ return err
+ case *bool:
+ *v = len(b) == 1 && b[0] == '1'
+ return nil
+ case encoding.BinaryUnmarshaler:
+ return v.UnmarshalBinary(b)
+ default:
+ return fmt.Errorf(
+ "redis: can't unmarshal %T (consider implementing BinaryUnmarshaler)", v)
+ }
+}
+
+func ScanSlice(data []string, slice interface{}) error {
+ v := reflect.ValueOf(slice)
+ if !v.IsValid() {
+ return fmt.Errorf("redis: ScanSlice(nil)")
+ }
+ if v.Kind() != reflect.Ptr {
+ return fmt.Errorf("redis: ScanSlice(non-pointer %T)", slice)
+ }
+ v = v.Elem()
+ if v.Kind() != reflect.Slice {
+ return fmt.Errorf("redis: ScanSlice(non-slice %T)", slice)
+ }
+
+ next := makeSliceNextElemFunc(v)
+ for i, s := range data {
+ elem := next()
+ if err := Scan([]byte(s), elem.Addr().Interface()); err != nil {
+ err = fmt.Errorf("redis: ScanSlice index=%d value=%q failed: %s", i, s, err)
+ return err
+ }
+ }
+
+ return nil
+}
+
+func makeSliceNextElemFunc(v reflect.Value) func() reflect.Value {
+ elemType := v.Type().Elem()
+
+ if elemType.Kind() == reflect.Ptr {
+ elemType = elemType.Elem()
+ return func() reflect.Value {
+ if v.Len() < v.Cap() {
+ v.Set(v.Slice(0, v.Len()+1))
+ elem := v.Index(v.Len() - 1)
+ if elem.IsNil() {
+ elem.Set(reflect.New(elemType))
+ }
+ return elem.Elem()
+ }
+
+ elem := reflect.New(elemType)
+ v.Set(reflect.Append(v, elem))
+ return elem.Elem()
+ }
+ }
+
+ zero := reflect.Zero(elemType)
+ return func() reflect.Value {
+ if v.Len() < v.Cap() {
+ v.Set(v.Slice(0, v.Len()+1))
+ return v.Index(v.Len() - 1)
+ }
+
+ v.Set(reflect.Append(v, zero))
+ return v.Index(v.Len() - 1)
+ }
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/proto/write_buffer.go b/src/dma/vendor/github.com/go-redis/redis/internal/proto/write_buffer.go
new file mode 100644
index 00000000..664f4c33
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/proto/write_buffer.go
@@ -0,0 +1,113 @@
+package proto
+
+import (
+ "encoding"
+ "fmt"
+ "strconv"
+)
+
+type WriteBuffer struct {
+ b []byte
+}
+
+func NewWriteBuffer() *WriteBuffer {
+ return &WriteBuffer{
+ b: make([]byte, 0, 4096),
+ }
+}
+
+func (w *WriteBuffer) Len() int { return len(w.b) }
+func (w *WriteBuffer) Bytes() []byte { return w.b }
+func (w *WriteBuffer) Reset() { w.b = w.b[:0] }
+
+func (w *WriteBuffer) Append(args []interface{}) error {
+ w.b = append(w.b, ArrayReply)
+ w.b = strconv.AppendUint(w.b, uint64(len(args)), 10)
+ w.b = append(w.b, '\r', '\n')
+
+ for _, arg := range args {
+ if err := w.append(arg); err != nil {
+ return err
+ }
+ }
+ return nil
+}
+
+func (w *WriteBuffer) append(val interface{}) error {
+ switch v := val.(type) {
+ case nil:
+ w.AppendString("")
+ case string:
+ w.AppendString(v)
+ case []byte:
+ w.AppendBytes(v)
+ case int:
+ w.AppendString(formatInt(int64(v)))
+ case int8:
+ w.AppendString(formatInt(int64(v)))
+ case int16:
+ w.AppendString(formatInt(int64(v)))
+ case int32:
+ w.AppendString(formatInt(int64(v)))
+ case int64:
+ w.AppendString(formatInt(v))
+ case uint:
+ w.AppendString(formatUint(uint64(v)))
+ case uint8:
+ w.AppendString(formatUint(uint64(v)))
+ case uint16:
+ w.AppendString(formatUint(uint64(v)))
+ case uint32:
+ w.AppendString(formatUint(uint64(v)))
+ case uint64:
+ w.AppendString(formatUint(v))
+ case float32:
+ w.AppendString(formatFloat(float64(v)))
+ case float64:
+ w.AppendString(formatFloat(v))
+ case bool:
+ if v {
+ w.AppendString("1")
+ } else {
+ w.AppendString("0")
+ }
+ case encoding.BinaryMarshaler:
+ b, err := v.MarshalBinary()
+ if err != nil {
+ return err
+ }
+ w.AppendBytes(b)
+ default:
+ return fmt.Errorf(
+ "redis: can't marshal %T (consider implementing encoding.BinaryMarshaler)", val)
+ }
+ return nil
+}
+
+func (w *WriteBuffer) AppendString(s string) {
+ w.b = append(w.b, StringReply)
+ w.b = strconv.AppendUint(w.b, uint64(len(s)), 10)
+ w.b = append(w.b, '\r', '\n')
+ w.b = append(w.b, s...)
+ w.b = append(w.b, '\r', '\n')
+}
+
+func (w *WriteBuffer) AppendBytes(p []byte) {
+ w.b = append(w.b, StringReply)
+ w.b = strconv.AppendUint(w.b, uint64(len(p)), 10)
+ w.b = append(w.b, '\r', '\n')
+ w.b = append(w.b, p...)
+ w.b = append(w.b, '\r', '\n')
+}
+
+func formatInt(n int64) string {
+ return strconv.FormatInt(n, 10)
+}
+
+func formatUint(u uint64) string {
+ return strconv.FormatUint(u, 10)
+}
+
+func formatFloat(f float64) string {
+ return strconv.FormatFloat(f, 'f', -1, 64)
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/singleflight/singleflight.go b/src/dma/vendor/github.com/go-redis/redis/internal/singleflight/singleflight.go
new file mode 100644
index 00000000..3b174172
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/singleflight/singleflight.go
@@ -0,0 +1,64 @@
+/*
+Copyright 2013 Google Inc.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+// Package singleflight provides a duplicate function call suppression
+// mechanism.
+package singleflight
+
+import "sync"
+
+// call is an in-flight or completed Do call
+type call struct {
+ wg sync.WaitGroup
+ val interface{}
+ err error
+}
+
+// Group represents a class of work and forms a namespace in which
+// units of work can be executed with duplicate suppression.
+type Group struct {
+ mu sync.Mutex // protects m
+ m map[string]*call // lazily initialized
+}
+
+// Do executes and returns the results of the given function, making
+// sure that only one execution is in-flight for a given key at a
+// time. If a duplicate comes in, the duplicate caller waits for the
+// original to complete and receives the same results.
+func (g *Group) Do(key string, fn func() (interface{}, error)) (interface{}, error) {
+ g.mu.Lock()
+ if g.m == nil {
+ g.m = make(map[string]*call)
+ }
+ if c, ok := g.m[key]; ok {
+ g.mu.Unlock()
+ c.wg.Wait()
+ return c.val, c.err
+ }
+ c := new(call)
+ c.wg.Add(1)
+ g.m[key] = c
+ g.mu.Unlock()
+
+ c.val, c.err = fn()
+ c.wg.Done()
+
+ g.mu.Lock()
+ delete(g.m, key)
+ g.mu.Unlock()
+
+ return c.val, c.err
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/util.go b/src/dma/vendor/github.com/go-redis/redis/internal/util.go
new file mode 100644
index 00000000..ffd2353e
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/util.go
@@ -0,0 +1,29 @@
+package internal
+
+import "github.com/go-redis/redis/internal/util"
+
+func ToLower(s string) string {
+ if isLower(s) {
+ return s
+ }
+
+ b := make([]byte, len(s))
+ for i := range b {
+ c := s[i]
+ if c >= 'A' && c <= 'Z' {
+ c += 'a' - 'A'
+ }
+ b[i] = c
+ }
+ return util.BytesToString(b)
+}
+
+func isLower(s string) bool {
+ for i := 0; i < len(s); i++ {
+ c := s[i]
+ if c >= 'A' && c <= 'Z' {
+ return false
+ }
+ }
+ return true
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/util/safe.go b/src/dma/vendor/github.com/go-redis/redis/internal/util/safe.go
new file mode 100644
index 00000000..cd891833
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/util/safe.go
@@ -0,0 +1,7 @@
+// +build appengine
+
+package util
+
+func BytesToString(b []byte) string {
+ return string(b)
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/util/strconv.go b/src/dma/vendor/github.com/go-redis/redis/internal/util/strconv.go
new file mode 100644
index 00000000..db503380
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/util/strconv.go
@@ -0,0 +1,19 @@
+package util
+
+import "strconv"
+
+func Atoi(b []byte) (int, error) {
+ return strconv.Atoi(BytesToString(b))
+}
+
+func ParseInt(b []byte, base int, bitSize int) (int64, error) {
+ return strconv.ParseInt(BytesToString(b), base, bitSize)
+}
+
+func ParseUint(b []byte, base int, bitSize int) (uint64, error) {
+ return strconv.ParseUint(BytesToString(b), base, bitSize)
+}
+
+func ParseFloat(b []byte, bitSize int) (float64, error) {
+ return strconv.ParseFloat(BytesToString(b), bitSize)
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/internal/util/unsafe.go b/src/dma/vendor/github.com/go-redis/redis/internal/util/unsafe.go
new file mode 100644
index 00000000..93a89c55
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/internal/util/unsafe.go
@@ -0,0 +1,12 @@
+// +build !appengine
+
+package util
+
+import (
+ "unsafe"
+)
+
+// BytesToString converts byte slice to string.
+func BytesToString(b []byte) string {
+ return *(*string)(unsafe.Pointer(&b))
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/iterator.go b/src/dma/vendor/github.com/go-redis/redis/iterator.go
new file mode 100644
index 00000000..5d4bedfe
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/iterator.go
@@ -0,0 +1,73 @@
+package redis
+
+import "sync"
+
+// ScanIterator is used to incrementally iterate over a collection of elements.
+// It's safe for concurrent use by multiple goroutines.
+type ScanIterator struct {
+ mu sync.Mutex // protects Scanner and pos
+ cmd *ScanCmd
+ pos int
+}
+
+// Err returns the last iterator error, if any.
+func (it *ScanIterator) Err() error {
+ it.mu.Lock()
+ err := it.cmd.Err()
+ it.mu.Unlock()
+ return err
+}
+
+// Next advances the cursor and returns true if more values can be read.
+func (it *ScanIterator) Next() bool {
+ it.mu.Lock()
+ defer it.mu.Unlock()
+
+ // Instantly return on errors.
+ if it.cmd.Err() != nil {
+ return false
+ }
+
+ // Advance cursor, check if we are still within range.
+ if it.pos < len(it.cmd.page) {
+ it.pos++
+ return true
+ }
+
+ for {
+ // Return if there is no more data to fetch.
+ if it.cmd.cursor == 0 {
+ return false
+ }
+
+ // Fetch next page.
+ if it.cmd._args[0] == "scan" {
+ it.cmd._args[1] = it.cmd.cursor
+ } else {
+ it.cmd._args[2] = it.cmd.cursor
+ }
+
+ err := it.cmd.process(it.cmd)
+ if err != nil {
+ return false
+ }
+
+ it.pos = 1
+
+ // Redis can occasionally return empty page.
+ if len(it.cmd.page) > 0 {
+ return true
+ }
+ }
+}
+
+// Val returns the key/field at the current cursor position.
+func (it *ScanIterator) Val() string {
+ var v string
+ it.mu.Lock()
+ if it.cmd.Err() == nil && it.pos > 0 && it.pos <= len(it.cmd.page) {
+ v = it.cmd.page[it.pos-1]
+ }
+ it.mu.Unlock()
+ return v
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/options.go b/src/dma/vendor/github.com/go-redis/redis/options.go
new file mode 100644
index 00000000..8a82d590
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/options.go
@@ -0,0 +1,203 @@
+package redis
+
+import (
+ "crypto/tls"
+ "errors"
+ "fmt"
+ "net"
+ "net/url"
+ "runtime"
+ "strconv"
+ "strings"
+ "time"
+
+ "github.com/go-redis/redis/internal/pool"
+)
+
+type Options struct {
+ // The network type, either tcp or unix.
+ // Default is tcp.
+ Network string
+ // host:port address.
+ Addr string
+
+ // Dialer creates new network connection and has priority over
+ // Network and Addr options.
+ Dialer func() (net.Conn, error)
+
+ // Hook that is called when new connection is established.
+ OnConnect func(*Conn) error
+
+ // Optional password. Must match the password specified in the
+ // requirepass server configuration option.
+ Password string
+ // Database to be selected after connecting to the server.
+ DB int
+
+ // Maximum number of retries before giving up.
+ // Default is to not retry failed commands.
+ MaxRetries int
+ // Minimum backoff between each retry.
+ // Default is 8 milliseconds; -1 disables backoff.
+ MinRetryBackoff time.Duration
+ // Maximum backoff between each retry.
+ // Default is 512 milliseconds; -1 disables backoff.
+ MaxRetryBackoff time.Duration
+
+ // Dial timeout for establishing new connections.
+ // Default is 5 seconds.
+ DialTimeout time.Duration
+ // Timeout for socket reads. If reached, commands will fail
+ // with a timeout instead of blocking.
+ // Default is 3 seconds.
+ ReadTimeout time.Duration
+ // Timeout for socket writes. If reached, commands will fail
+ // with a timeout instead of blocking.
+ // Default is ReadTimeout.
+ WriteTimeout time.Duration
+
+ // Maximum number of socket connections.
+ // Default is 10 connections per every CPU as reported by runtime.NumCPU.
+ PoolSize int
+ // Amount of time client waits for connection if all connections
+ // are busy before returning an error.
+ // Default is ReadTimeout + 1 second.
+ PoolTimeout time.Duration
+ // Amount of time after which client closes idle connections.
+ // Should be less than server's timeout.
+ // Default is 5 minutes. -1 disables idle timeout check.
+ IdleTimeout time.Duration
+ // Frequency of idle checks made by idle connections reaper.
+ // Default is 1 minute. -1 disables idle connections reaper,
+ // but idle connections are still discarded by the client.
+ IdleCheckFrequency time.Duration
+
+ // Enables read only queries on slave nodes.
+ readOnly bool
+
+ // TLS Config to use. When set TLS will be negotiated.
+ TLSConfig *tls.Config
+}
+
+func (opt *Options) init() {
+ if opt.Network == "" {
+ opt.Network = "tcp"
+ }
+ if opt.Dialer == nil {
+ opt.Dialer = func() (net.Conn, error) {
+ netDialer := &net.Dialer{
+ Timeout: opt.DialTimeout,
+ KeepAlive: 5 * time.Minute,
+ }
+ if opt.TLSConfig == nil {
+ return netDialer.Dial(opt.Network, opt.Addr)
+ } else {
+ return tls.DialWithDialer(netDialer, opt.Network, opt.Addr, opt.TLSConfig)
+ }
+ }
+ }
+ if opt.PoolSize == 0 {
+ opt.PoolSize = 10 * runtime.NumCPU()
+ }
+ if opt.DialTimeout == 0 {
+ opt.DialTimeout = 5 * time.Second
+ }
+ switch opt.ReadTimeout {
+ case -1:
+ opt.ReadTimeout = 0
+ case 0:
+ opt.ReadTimeout = 3 * time.Second
+ }
+ switch opt.WriteTimeout {
+ case -1:
+ opt.WriteTimeout = 0
+ case 0:
+ opt.WriteTimeout = opt.ReadTimeout
+ }
+ if opt.PoolTimeout == 0 {
+ opt.PoolTimeout = opt.ReadTimeout + time.Second
+ }
+ if opt.IdleTimeout == 0 {
+ opt.IdleTimeout = 5 * time.Minute
+ }
+ if opt.IdleCheckFrequency == 0 {
+ opt.IdleCheckFrequency = time.Minute
+ }
+
+ switch opt.MinRetryBackoff {
+ case -1:
+ opt.MinRetryBackoff = 0
+ case 0:
+ opt.MinRetryBackoff = 8 * time.Millisecond
+ }
+ switch opt.MaxRetryBackoff {
+ case -1:
+ opt.MaxRetryBackoff = 0
+ case 0:
+ opt.MaxRetryBackoff = 512 * time.Millisecond
+ }
+}
+
+// ParseURL parses an URL into Options that can be used to connect to Redis.
+func ParseURL(redisURL string) (*Options, error) {
+ o := &Options{Network: "tcp"}
+ u, err := url.Parse(redisURL)
+ if err != nil {
+ return nil, err
+ }
+
+ if u.Scheme != "redis" && u.Scheme != "rediss" {
+ return nil, errors.New("invalid redis URL scheme: " + u.Scheme)
+ }
+
+ if u.User != nil {
+ if p, ok := u.User.Password(); ok {
+ o.Password = p
+ }
+ }
+
+ if len(u.Query()) > 0 {
+ return nil, errors.New("no options supported")
+ }
+
+ h, p, err := net.SplitHostPort(u.Host)
+ if err != nil {
+ h = u.Host
+ }
+ if h == "" {
+ h = "localhost"
+ }
+ if p == "" {
+ p = "6379"
+ }
+ o.Addr = net.JoinHostPort(h, p)
+
+ f := strings.FieldsFunc(u.Path, func(r rune) bool {
+ return r == '/'
+ })
+ switch len(f) {
+ case 0:
+ o.DB = 0
+ case 1:
+ if o.DB, err = strconv.Atoi(f[0]); err != nil {
+ return nil, fmt.Errorf("invalid redis database number: %q", f[0])
+ }
+ default:
+ return nil, errors.New("invalid redis URL path: " + u.Path)
+ }
+
+ if u.Scheme == "rediss" {
+ o.TLSConfig = &tls.Config{ServerName: h}
+ }
+ return o, nil
+}
+
+func newConnPool(opt *Options) *pool.ConnPool {
+ return pool.NewConnPool(&pool.Options{
+ Dialer: opt.Dialer,
+ PoolSize: opt.PoolSize,
+ PoolTimeout: opt.PoolTimeout,
+ IdleTimeout: opt.IdleTimeout,
+ IdleCheckFrequency: opt.IdleCheckFrequency,
+ })
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/parser.go b/src/dma/vendor/github.com/go-redis/redis/parser.go
new file mode 100644
index 00000000..f0dc67f0
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/parser.go
@@ -0,0 +1,394 @@
+package redis
+
+import (
+ "fmt"
+ "net"
+ "strconv"
+ "time"
+
+ "github.com/go-redis/redis/internal/proto"
+)
+
+// Implements proto.MultiBulkParse
+func sliceParser(rd *proto.Reader, n int64) (interface{}, error) {
+ vals := make([]interface{}, 0, n)
+ for i := int64(0); i < n; i++ {
+ v, err := rd.ReadReply(sliceParser)
+ if err != nil {
+ if err == Nil {
+ vals = append(vals, nil)
+ continue
+ }
+ if err, ok := err.(proto.RedisError); ok {
+ vals = append(vals, err)
+ continue
+ }
+ return nil, err
+ }
+
+ switch v := v.(type) {
+ case []byte:
+ vals = append(vals, string(v))
+ default:
+ vals = append(vals, v)
+ }
+ }
+ return vals, nil
+}
+
+// Implements proto.MultiBulkParse
+func boolSliceParser(rd *proto.Reader, n int64) (interface{}, error) {
+ bools := make([]bool, 0, n)
+ for i := int64(0); i < n; i++ {
+ n, err := rd.ReadIntReply()
+ if err != nil {
+ return nil, err
+ }
+ bools = append(bools, n == 1)
+ }
+ return bools, nil
+}
+
+// Implements proto.MultiBulkParse
+func stringSliceParser(rd *proto.Reader, n int64) (interface{}, error) {
+ ss := make([]string, 0, n)
+ for i := int64(0); i < n; i++ {
+ s, err := rd.ReadStringReply()
+ if err == Nil {
+ ss = append(ss, "")
+ } else if err != nil {
+ return nil, err
+ } else {
+ ss = append(ss, s)
+ }
+ }
+ return ss, nil
+}
+
+// Implements proto.MultiBulkParse
+func stringStringMapParser(rd *proto.Reader, n int64) (interface{}, error) {
+ m := make(map[string]string, n/2)
+ for i := int64(0); i < n; i += 2 {
+ key, err := rd.ReadStringReply()
+ if err != nil {
+ return nil, err
+ }
+
+ value, err := rd.ReadStringReply()
+ if err != nil {
+ return nil, err
+ }
+
+ m[key] = value
+ }
+ return m, nil
+}
+
+// Implements proto.MultiBulkParse
+func stringIntMapParser(rd *proto.Reader, n int64) (interface{}, error) {
+ m := make(map[string]int64, n/2)
+ for i := int64(0); i < n; i += 2 {
+ key, err := rd.ReadStringReply()
+ if err != nil {
+ return nil, err
+ }
+
+ n, err := rd.ReadIntReply()
+ if err != nil {
+ return nil, err
+ }
+
+ m[key] = n
+ }
+ return m, nil
+}
+
+// Implements proto.MultiBulkParse
+func stringStructMapParser(rd *proto.Reader, n int64) (interface{}, error) {
+ m := make(map[string]struct{}, n)
+ for i := int64(0); i < n; i++ {
+ key, err := rd.ReadStringReply()
+ if err != nil {
+ return nil, err
+ }
+
+ m[key] = struct{}{}
+ }
+ return m, nil
+}
+
+// Implements proto.MultiBulkParse
+func zSliceParser(rd *proto.Reader, n int64) (interface{}, error) {
+ zz := make([]Z, n/2)
+ for i := int64(0); i < n; i += 2 {
+ var err error
+
+ z := &zz[i/2]
+
+ z.Member, err = rd.ReadStringReply()
+ if err != nil {
+ return nil, err
+ }
+
+ z.Score, err = rd.ReadFloatReply()
+ if err != nil {
+ return nil, err
+ }
+ }
+ return zz, nil
+}
+
+// Implements proto.MultiBulkParse
+func clusterSlotsParser(rd *proto.Reader, n int64) (interface{}, error) {
+ slots := make([]ClusterSlot, n)
+ for i := 0; i < len(slots); i++ {
+ n, err := rd.ReadArrayLen()
+ if err != nil {
+ return nil, err
+ }
+ if n < 2 {
+ err := fmt.Errorf("redis: got %d elements in cluster info, expected at least 2", n)
+ return nil, err
+ }
+
+ start, err := rd.ReadIntReply()
+ if err != nil {
+ return nil, err
+ }
+
+ end, err := rd.ReadIntReply()
+ if err != nil {
+ return nil, err
+ }
+
+ nodes := make([]ClusterNode, n-2)
+ for j := 0; j < len(nodes); j++ {
+ n, err := rd.ReadArrayLen()
+ if err != nil {
+ return nil, err
+ }
+ if n != 2 && n != 3 {
+ err := fmt.Errorf("got %d elements in cluster info address, expected 2 or 3", n)
+ return nil, err
+ }
+
+ ip, err := rd.ReadStringReply()
+ if err != nil {
+ return nil, err
+ }
+
+ port, err := rd.ReadIntReply()
+ if err != nil {
+ return nil, err
+ }
+ nodes[j].Addr = net.JoinHostPort(ip, strconv.FormatInt(port, 10))
+
+ if n == 3 {
+ id, err := rd.ReadStringReply()
+ if err != nil {
+ return nil, err
+ }
+ nodes[j].Id = id
+ }
+ }
+
+ slots[i] = ClusterSlot{
+ Start: int(start),
+ End: int(end),
+ Nodes: nodes,
+ }
+ }
+ return slots, nil
+}
+
+func newGeoLocationParser(q *GeoRadiusQuery) proto.MultiBulkParse {
+ return func(rd *proto.Reader, n int64) (interface{}, error) {
+ var loc GeoLocation
+ var err error
+
+ loc.Name, err = rd.ReadStringReply()
+ if err != nil {
+ return nil, err
+ }
+ if q.WithDist {
+ loc.Dist, err = rd.ReadFloatReply()
+ if err != nil {
+ return nil, err
+ }
+ }
+ if q.WithGeoHash {
+ loc.GeoHash, err = rd.ReadIntReply()
+ if err != nil {
+ return nil, err
+ }
+ }
+ if q.WithCoord {
+ n, err := rd.ReadArrayLen()
+ if err != nil {
+ return nil, err
+ }
+ if n != 2 {
+ return nil, fmt.Errorf("got %d coordinates, expected 2", n)
+ }
+
+ loc.Longitude, err = rd.ReadFloatReply()
+ if err != nil {
+ return nil, err
+ }
+ loc.Latitude, err = rd.ReadFloatReply()
+ if err != nil {
+ return nil, err
+ }
+ }
+
+ return &loc, nil
+ }
+}
+
+func newGeoLocationSliceParser(q *GeoRadiusQuery) proto.MultiBulkParse {
+ return func(rd *proto.Reader, n int64) (interface{}, error) {
+ locs := make([]GeoLocation, 0, n)
+ for i := int64(0); i < n; i++ {
+ v, err := rd.ReadReply(newGeoLocationParser(q))
+ if err != nil {
+ return nil, err
+ }
+ switch vv := v.(type) {
+ case []byte:
+ locs = append(locs, GeoLocation{
+ Name: string(vv),
+ })
+ case *GeoLocation:
+ locs = append(locs, *vv)
+ default:
+ return nil, fmt.Errorf("got %T, expected string or *GeoLocation", v)
+ }
+ }
+ return locs, nil
+ }
+}
+
+func geoPosParser(rd *proto.Reader, n int64) (interface{}, error) {
+ var pos GeoPos
+ var err error
+
+ pos.Longitude, err = rd.ReadFloatReply()
+ if err != nil {
+ return nil, err
+ }
+
+ pos.Latitude, err = rd.ReadFloatReply()
+ if err != nil {
+ return nil, err
+ }
+
+ return &pos, nil
+}
+
+func geoPosSliceParser(rd *proto.Reader, n int64) (interface{}, error) {
+ positions := make([]*GeoPos, 0, n)
+ for i := int64(0); i < n; i++ {
+ v, err := rd.ReadReply(geoPosParser)
+ if err != nil {
+ if err == Nil {
+ positions = append(positions, nil)
+ continue
+ }
+ return nil, err
+ }
+ switch v := v.(type) {
+ case *GeoPos:
+ positions = append(positions, v)
+ default:
+ return nil, fmt.Errorf("got %T, expected *GeoPos", v)
+ }
+ }
+ return positions, nil
+}
+
+func commandInfoParser(rd *proto.Reader, n int64) (interface{}, error) {
+ var cmd CommandInfo
+ var err error
+
+ if n != 6 {
+ return nil, fmt.Errorf("redis: got %d elements in COMMAND reply, wanted 6", n)
+ }
+
+ cmd.Name, err = rd.ReadStringReply()
+ if err != nil {
+ return nil, err
+ }
+
+ arity, err := rd.ReadIntReply()
+ if err != nil {
+ return nil, err
+ }
+ cmd.Arity = int8(arity)
+
+ flags, err := rd.ReadReply(stringSliceParser)
+ if err != nil {
+ return nil, err
+ }
+ cmd.Flags = flags.([]string)
+
+ firstKeyPos, err := rd.ReadIntReply()
+ if err != nil {
+ return nil, err
+ }
+ cmd.FirstKeyPos = int8(firstKeyPos)
+
+ lastKeyPos, err := rd.ReadIntReply()
+ if err != nil {
+ return nil, err
+ }
+ cmd.LastKeyPos = int8(lastKeyPos)
+
+ stepCount, err := rd.ReadIntReply()
+ if err != nil {
+ return nil, err
+ }
+ cmd.StepCount = int8(stepCount)
+
+ for _, flag := range cmd.Flags {
+ if flag == "readonly" {
+ cmd.ReadOnly = true
+ break
+ }
+ }
+
+ return &cmd, nil
+}
+
+// Implements proto.MultiBulkParse
+func commandInfoSliceParser(rd *proto.Reader, n int64) (interface{}, error) {
+ m := make(map[string]*CommandInfo, n)
+ for i := int64(0); i < n; i++ {
+ v, err := rd.ReadReply(commandInfoParser)
+ if err != nil {
+ return nil, err
+ }
+ vv := v.(*CommandInfo)
+ m[vv.Name] = vv
+
+ }
+ return m, nil
+}
+
+// Implements proto.MultiBulkParse
+func timeParser(rd *proto.Reader, n int64) (interface{}, error) {
+ if n != 2 {
+ return nil, fmt.Errorf("got %d elements, expected 2", n)
+ }
+
+ sec, err := rd.ReadInt()
+ if err != nil {
+ return nil, err
+ }
+
+ microsec, err := rd.ReadInt()
+ if err != nil {
+ return nil, err
+ }
+
+ return time.Unix(sec, microsec*1000), nil
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/pipeline.go b/src/dma/vendor/github.com/go-redis/redis/pipeline.go
new file mode 100644
index 00000000..ba852283
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/pipeline.go
@@ -0,0 +1,113 @@
+package redis
+
+import (
+ "sync"
+
+ "github.com/go-redis/redis/internal/pool"
+)
+
+type pipelineExecer func([]Cmder) error
+
+type Pipeliner interface {
+ StatefulCmdable
+ Process(cmd Cmder) error
+ Close() error
+ Discard() error
+ Exec() ([]Cmder, error)
+}
+
+var _ Pipeliner = (*Pipeline)(nil)
+
+// Pipeline implements pipelining as described in
+// http://redis.io/topics/pipelining. It's safe for concurrent use
+// by multiple goroutines.
+type Pipeline struct {
+ statefulCmdable
+
+ exec pipelineExecer
+
+ mu sync.Mutex
+ cmds []Cmder
+ closed bool
+}
+
+// Process queues the cmd for later execution.
+func (c *Pipeline) Process(cmd Cmder) error {
+ c.mu.Lock()
+ c.cmds = append(c.cmds, cmd)
+ c.mu.Unlock()
+ return nil
+}
+
+// Close closes the pipeline, releasing any open resources.
+func (c *Pipeline) Close() error {
+ c.mu.Lock()
+ c.discard()
+ c.closed = true
+ c.mu.Unlock()
+ return nil
+}
+
+// Discard resets the pipeline and discards queued commands.
+func (c *Pipeline) Discard() error {
+ c.mu.Lock()
+ err := c.discard()
+ c.mu.Unlock()
+ return err
+}
+
+func (c *Pipeline) discard() error {
+ if c.closed {
+ return pool.ErrClosed
+ }
+ c.cmds = c.cmds[:0]
+ return nil
+}
+
+// Exec executes all previously queued commands using one
+// client-server roundtrip.
+//
+// Exec always returns list of commands and error of the first failed
+// command if any.
+func (c *Pipeline) Exec() ([]Cmder, error) {
+ c.mu.Lock()
+ defer c.mu.Unlock()
+
+ if c.closed {
+ return nil, pool.ErrClosed
+ }
+
+ if len(c.cmds) == 0 {
+ return nil, nil
+ }
+
+ cmds := c.cmds
+ c.cmds = nil
+
+ return cmds, c.exec(cmds)
+}
+
+func (c *Pipeline) pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ if err := fn(c); err != nil {
+ return nil, err
+ }
+ cmds, err := c.Exec()
+ _ = c.Close()
+ return cmds, err
+}
+
+func (c *Pipeline) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ return c.pipelined(fn)
+}
+
+func (c *Pipeline) Pipeline() Pipeliner {
+ return c
+}
+
+func (c *Pipeline) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ return c.pipelined(fn)
+}
+
+func (c *Pipeline) TxPipeline() Pipeliner {
+ return c
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/pubsub.go b/src/dma/vendor/github.com/go-redis/redis/pubsub.go
new file mode 100644
index 00000000..2cfcd150
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/pubsub.go
@@ -0,0 +1,460 @@
+package redis
+
+import (
+ "fmt"
+ "sync"
+ "time"
+
+ "github.com/go-redis/redis/internal"
+ "github.com/go-redis/redis/internal/pool"
+)
+
+// PubSub implements Pub/Sub commands as described in
+// http://redis.io/topics/pubsub. Message receiving is NOT safe
+// for concurrent use by multiple goroutines.
+//
+// PubSub automatically reconnects to Redis Server and resubscribes
+// to the channels in case of network errors.
+type PubSub struct {
+ opt *Options
+
+ newConn func([]string) (*pool.Conn, error)
+ closeConn func(*pool.Conn) error
+
+ mu sync.Mutex
+ cn *pool.Conn
+ channels map[string]struct{}
+ patterns map[string]struct{}
+ closed bool
+ exit chan struct{}
+
+ cmd *Cmd
+
+ chOnce sync.Once
+ ch chan *Message
+ ping chan struct{}
+}
+
+func (c *PubSub) init() {
+ c.exit = make(chan struct{})
+}
+
+func (c *PubSub) conn() (*pool.Conn, error) {
+ c.mu.Lock()
+ cn, err := c._conn(nil)
+ c.mu.Unlock()
+ return cn, err
+}
+
+func (c *PubSub) _conn(channels []string) (*pool.Conn, error) {
+ if c.closed {
+ return nil, pool.ErrClosed
+ }
+
+ if c.cn != nil {
+ return c.cn, nil
+ }
+
+ cn, err := c.newConn(channels)
+ if err != nil {
+ return nil, err
+ }
+
+ if err := c.resubscribe(cn); err != nil {
+ _ = c.closeConn(cn)
+ return nil, err
+ }
+
+ c.cn = cn
+ return cn, nil
+}
+
+func (c *PubSub) resubscribe(cn *pool.Conn) error {
+ var firstErr error
+
+ if len(c.channels) > 0 {
+ channels := mapKeys(c.channels)
+ err := c._subscribe(cn, "subscribe", channels...)
+ if err != nil && firstErr == nil {
+ firstErr = err
+ }
+ }
+
+ if len(c.patterns) > 0 {
+ patterns := mapKeys(c.patterns)
+ err := c._subscribe(cn, "psubscribe", patterns...)
+ if err != nil && firstErr == nil {
+ firstErr = err
+ }
+ }
+
+ return firstErr
+}
+
+func mapKeys(m map[string]struct{}) []string {
+ s := make([]string, len(m))
+ i := 0
+ for k := range m {
+ s[i] = k
+ i++
+ }
+ return s
+}
+
+func (c *PubSub) _subscribe(cn *pool.Conn, redisCmd string, channels ...string) error {
+ args := make([]interface{}, 1+len(channels))
+ args[0] = redisCmd
+ for i, channel := range channels {
+ args[1+i] = channel
+ }
+ cmd := NewSliceCmd(args...)
+
+ cn.SetWriteTimeout(c.opt.WriteTimeout)
+ return writeCmd(cn, cmd)
+}
+
+func (c *PubSub) releaseConn(cn *pool.Conn, err error) {
+ c.mu.Lock()
+ c._releaseConn(cn, err)
+ c.mu.Unlock()
+}
+
+func (c *PubSub) _releaseConn(cn *pool.Conn, err error) {
+ if c.cn != cn {
+ return
+ }
+ if internal.IsBadConn(err, true) {
+ c._reconnect()
+ }
+}
+
+func (c *PubSub) _closeTheCn() error {
+ var err error
+ if c.cn != nil {
+ err = c.closeConn(c.cn)
+ c.cn = nil
+ }
+ return err
+}
+
+func (c *PubSub) reconnect() {
+ c.mu.Lock()
+ c._reconnect()
+ c.mu.Unlock()
+}
+
+func (c *PubSub) _reconnect() {
+ _ = c._closeTheCn()
+ _, _ = c._conn(nil)
+}
+
+func (c *PubSub) Close() error {
+ c.mu.Lock()
+ defer c.mu.Unlock()
+
+ if c.closed {
+ return pool.ErrClosed
+ }
+ c.closed = true
+ close(c.exit)
+
+ err := c._closeTheCn()
+ return err
+}
+
+// Subscribe the client to the specified channels. It returns
+// empty subscription if there are no channels.
+func (c *PubSub) Subscribe(channels ...string) error {
+ c.mu.Lock()
+ defer c.mu.Unlock()
+
+ err := c.subscribe("subscribe", channels...)
+ if c.channels == nil {
+ c.channels = make(map[string]struct{})
+ }
+ for _, channel := range channels {
+ c.channels[channel] = struct{}{}
+ }
+ return err
+}
+
+// PSubscribe the client to the given patterns. It returns
+// empty subscription if there are no patterns.
+func (c *PubSub) PSubscribe(patterns ...string) error {
+ c.mu.Lock()
+ defer c.mu.Unlock()
+
+ err := c.subscribe("psubscribe", patterns...)
+ if c.patterns == nil {
+ c.patterns = make(map[string]struct{})
+ }
+ for _, pattern := range patterns {
+ c.patterns[pattern] = struct{}{}
+ }
+ return err
+}
+
+// Unsubscribe the client from the given channels, or from all of
+// them if none is given.
+func (c *PubSub) Unsubscribe(channels ...string) error {
+ c.mu.Lock()
+ defer c.mu.Unlock()
+
+ err := c.subscribe("unsubscribe", channels...)
+ for _, channel := range channels {
+ delete(c.channels, channel)
+ }
+ return err
+}
+
+// PUnsubscribe the client from the given patterns, or from all of
+// them if none is given.
+func (c *PubSub) PUnsubscribe(patterns ...string) error {
+ c.mu.Lock()
+ defer c.mu.Unlock()
+
+ err := c.subscribe("punsubscribe", patterns...)
+ for _, pattern := range patterns {
+ delete(c.patterns, pattern)
+ }
+ return err
+}
+
+func (c *PubSub) subscribe(redisCmd string, channels ...string) error {
+ cn, err := c._conn(channels)
+ if err != nil {
+ return err
+ }
+
+ err = c._subscribe(cn, redisCmd, channels...)
+ c._releaseConn(cn, err)
+ return err
+}
+
+func (c *PubSub) Ping(payload ...string) error {
+ args := []interface{}{"ping"}
+ if len(payload) == 1 {
+ args = append(args, payload[0])
+ }
+ cmd := NewCmd(args...)
+
+ cn, err := c.conn()
+ if err != nil {
+ return err
+ }
+
+ cn.SetWriteTimeout(c.opt.WriteTimeout)
+ err = writeCmd(cn, cmd)
+ c.releaseConn(cn, err)
+ return err
+}
+
+// Subscription received after a successful subscription to channel.
+type Subscription struct {
+ // Can be "subscribe", "unsubscribe", "psubscribe" or "punsubscribe".
+ Kind string
+ // Channel name we have subscribed to.
+ Channel string
+ // Number of channels we are currently subscribed to.
+ Count int
+}
+
+func (m *Subscription) String() string {
+ return fmt.Sprintf("%s: %s", m.Kind, m.Channel)
+}
+
+// Message received as result of a PUBLISH command issued by another client.
+type Message struct {
+ Channel string
+ Pattern string
+ Payload string
+}
+
+func (m *Message) String() string {
+ return fmt.Sprintf("Message<%s: %s>", m.Channel, m.Payload)
+}
+
+// Pong received as result of a PING command issued by another client.
+type Pong struct {
+ Payload string
+}
+
+func (p *Pong) String() string {
+ if p.Payload != "" {
+ return fmt.Sprintf("Pong<%s>", p.Payload)
+ }
+ return "Pong"
+}
+
+func (c *PubSub) newMessage(reply interface{}) (interface{}, error) {
+ switch reply := reply.(type) {
+ case string:
+ return &Pong{
+ Payload: reply,
+ }, nil
+ case []interface{}:
+ switch kind := reply[0].(string); kind {
+ case "subscribe", "unsubscribe", "psubscribe", "punsubscribe":
+ return &Subscription{
+ Kind: kind,
+ Channel: reply[1].(string),
+ Count: int(reply[2].(int64)),
+ }, nil
+ case "message":
+ return &Message{
+ Channel: reply[1].(string),
+ Payload: reply[2].(string),
+ }, nil
+ case "pmessage":
+ return &Message{
+ Pattern: reply[1].(string),
+ Channel: reply[2].(string),
+ Payload: reply[3].(string),
+ }, nil
+ case "pong":
+ return &Pong{
+ Payload: reply[1].(string),
+ }, nil
+ default:
+ return nil, fmt.Errorf("redis: unsupported pubsub message: %q", kind)
+ }
+ default:
+ return nil, fmt.Errorf("redis: unsupported pubsub message: %#v", reply)
+ }
+}
+
+// ReceiveTimeout acts like Receive but returns an error if message
+// is not received in time. This is low-level API and in most cases
+// Channel should be used instead.
+func (c *PubSub) ReceiveTimeout(timeout time.Duration) (interface{}, error) {
+ if c.cmd == nil {
+ c.cmd = NewCmd()
+ }
+
+ cn, err := c.conn()
+ if err != nil {
+ return nil, err
+ }
+
+ cn.SetReadTimeout(timeout)
+ err = c.cmd.readReply(cn)
+ c.releaseConn(cn, err)
+ if err != nil {
+ return nil, err
+ }
+
+ return c.newMessage(c.cmd.Val())
+}
+
+// Receive returns a message as a Subscription, Message, Pong or error.
+// See PubSub example for details. This is low-level API and in most cases
+// Channel should be used instead.
+func (c *PubSub) Receive() (interface{}, error) {
+ return c.ReceiveTimeout(0)
+}
+
+// ReceiveMessage returns a Message or error ignoring Subscription and Pong
+// messages. This is low-level API and in most cases Channel should be used
+// instead.
+func (c *PubSub) ReceiveMessage() (*Message, error) {
+ for {
+ msg, err := c.Receive()
+ if err != nil {
+ return nil, err
+ }
+
+ switch msg := msg.(type) {
+ case *Subscription:
+ // Ignore.
+ case *Pong:
+ // Ignore.
+ case *Message:
+ return msg, nil
+ default:
+ err := fmt.Errorf("redis: unknown message: %T", msg)
+ return nil, err
+ }
+ }
+}
+
+// Channel returns a Go channel for concurrently receiving messages.
+// It periodically sends Ping messages to test connection health.
+// The channel is closed with PubSub. Receive* APIs can not be used
+// after channel is created.
+func (c *PubSub) Channel() <-chan *Message {
+ c.chOnce.Do(c.initChannel)
+ return c.ch
+}
+
+func (c *PubSub) initChannel() {
+ c.ch = make(chan *Message, 100)
+ c.ping = make(chan struct{}, 10)
+
+ go func() {
+ var errCount int
+ for {
+ msg, err := c.Receive()
+ if err != nil {
+ if err == pool.ErrClosed {
+ close(c.ch)
+ return
+ }
+ if errCount > 0 {
+ time.Sleep(c.retryBackoff(errCount))
+ }
+ errCount++
+ continue
+ }
+ errCount = 0
+
+ // Any message is as good as a ping.
+ select {
+ case c.ping <- struct{}{}:
+ default:
+ }
+
+ switch msg := msg.(type) {
+ case *Subscription:
+ // Ignore.
+ case *Pong:
+ // Ignore.
+ case *Message:
+ c.ch <- msg
+ default:
+ internal.Logf("redis: unknown message: %T", msg)
+ }
+ }
+ }()
+
+ go func() {
+ const timeout = 5 * time.Second
+
+ timer := time.NewTimer(timeout)
+ timer.Stop()
+
+ var hasPing bool
+ for {
+ timer.Reset(timeout)
+ select {
+ case <-c.ping:
+ hasPing = true
+ if !timer.Stop() {
+ <-timer.C
+ }
+ case <-timer.C:
+ if hasPing {
+ hasPing = false
+ _ = c.Ping()
+ } else {
+ c.reconnect()
+ }
+ case <-c.exit:
+ return
+ }
+ }
+ }()
+}
+
+func (c *PubSub) retryBackoff(attempt int) time.Duration {
+ return internal.RetryBackoff(attempt, c.opt.MinRetryBackoff, c.opt.MaxRetryBackoff)
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/redis.go b/src/dma/vendor/github.com/go-redis/redis/redis.go
new file mode 100644
index 00000000..c0f142cc
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/redis.go
@@ -0,0 +1,501 @@
+package redis
+
+import (
+ "context"
+ "fmt"
+ "log"
+ "os"
+ "time"
+
+ "github.com/go-redis/redis/internal"
+ "github.com/go-redis/redis/internal/pool"
+ "github.com/go-redis/redis/internal/proto"
+)
+
+// Nil reply Redis returns when key does not exist.
+const Nil = proto.Nil
+
+func init() {
+ SetLogger(log.New(os.Stderr, "redis: ", log.LstdFlags|log.Lshortfile))
+}
+
+func SetLogger(logger *log.Logger) {
+ internal.Logger = logger
+}
+
+type baseClient struct {
+ opt *Options
+ connPool pool.Pooler
+
+ process func(Cmder) error
+ processPipeline func([]Cmder) error
+ processTxPipeline func([]Cmder) error
+
+ onClose func() error // hook called when client is closed
+}
+
+func (c *baseClient) init() {
+ c.process = c.defaultProcess
+ c.processPipeline = c.defaultProcessPipeline
+ c.processTxPipeline = c.defaultProcessTxPipeline
+}
+
+func (c *baseClient) String() string {
+ return fmt.Sprintf("Redis<%s db:%d>", c.getAddr(), c.opt.DB)
+}
+
+func (c *baseClient) newConn() (*pool.Conn, error) {
+ cn, err := c.connPool.NewConn()
+ if err != nil {
+ return nil, err
+ }
+
+ if !cn.Inited {
+ if err := c.initConn(cn); err != nil {
+ _ = c.connPool.CloseConn(cn)
+ return nil, err
+ }
+ }
+
+ return cn, nil
+}
+
+func (c *baseClient) getConn() (*pool.Conn, error) {
+ cn, err := c.connPool.Get()
+ if err != nil {
+ return nil, err
+ }
+
+ if !cn.Inited {
+ err := c.initConn(cn)
+ if err != nil {
+ c.connPool.Remove(cn)
+ return nil, err
+ }
+ }
+
+ return cn, nil
+}
+
+func (c *baseClient) releaseConn(cn *pool.Conn, err error) bool {
+ if internal.IsBadConn(err, false) {
+ c.connPool.Remove(cn)
+ return false
+ }
+
+ c.connPool.Put(cn)
+ return true
+}
+
+func (c *baseClient) initConn(cn *pool.Conn) error {
+ cn.Inited = true
+
+ if c.opt.Password == "" &&
+ c.opt.DB == 0 &&
+ !c.opt.readOnly &&
+ c.opt.OnConnect == nil {
+ return nil
+ }
+
+ conn := newConn(c.opt, cn)
+ _, err := conn.Pipelined(func(pipe Pipeliner) error {
+ if c.opt.Password != "" {
+ pipe.Auth(c.opt.Password)
+ }
+
+ if c.opt.DB > 0 {
+ pipe.Select(c.opt.DB)
+ }
+
+ if c.opt.readOnly {
+ pipe.ReadOnly()
+ }
+
+ return nil
+ })
+ if err != nil {
+ return err
+ }
+
+ if c.opt.OnConnect != nil {
+ return c.opt.OnConnect(conn)
+ }
+ return nil
+}
+
+// WrapProcess wraps function that processes Redis commands.
+func (c *baseClient) WrapProcess(fn func(oldProcess func(cmd Cmder) error) func(cmd Cmder) error) {
+ c.process = fn(c.process)
+}
+
+func (c *baseClient) Process(cmd Cmder) error {
+ return c.process(cmd)
+}
+
+func (c *baseClient) defaultProcess(cmd Cmder) error {
+ for attempt := 0; attempt <= c.opt.MaxRetries; attempt++ {
+ if attempt > 0 {
+ time.Sleep(c.retryBackoff(attempt))
+ }
+
+ cn, err := c.getConn()
+ if err != nil {
+ cmd.setErr(err)
+ if internal.IsRetryableError(err, true) {
+ continue
+ }
+ return err
+ }
+
+ cn.SetWriteTimeout(c.opt.WriteTimeout)
+ if err := writeCmd(cn, cmd); err != nil {
+ c.releaseConn(cn, err)
+ cmd.setErr(err)
+ if internal.IsRetryableError(err, true) {
+ continue
+ }
+ return err
+ }
+
+ cn.SetReadTimeout(c.cmdTimeout(cmd))
+ err = cmd.readReply(cn)
+ c.releaseConn(cn, err)
+ if err != nil && internal.IsRetryableError(err, cmd.readTimeout() == nil) {
+ continue
+ }
+
+ return err
+ }
+
+ return cmd.Err()
+}
+
+func (c *baseClient) retryBackoff(attempt int) time.Duration {
+ return internal.RetryBackoff(attempt, c.opt.MinRetryBackoff, c.opt.MaxRetryBackoff)
+}
+
+func (c *baseClient) cmdTimeout(cmd Cmder) time.Duration {
+ if timeout := cmd.readTimeout(); timeout != nil {
+ return readTimeout(*timeout)
+ }
+ return c.opt.ReadTimeout
+}
+
+// Close closes the client, releasing any open resources.
+//
+// It is rare to Close a Client, as the Client is meant to be
+// long-lived and shared between many goroutines.
+func (c *baseClient) Close() error {
+ var firstErr error
+ if c.onClose != nil {
+ if err := c.onClose(); err != nil && firstErr == nil {
+ firstErr = err
+ }
+ }
+ if err := c.connPool.Close(); err != nil && firstErr == nil {
+ firstErr = err
+ }
+ return firstErr
+}
+
+func (c *baseClient) getAddr() string {
+ return c.opt.Addr
+}
+
+func (c *baseClient) WrapProcessPipeline(
+ fn func(oldProcess func([]Cmder) error) func([]Cmder) error,
+) {
+ c.processPipeline = fn(c.processPipeline)
+ c.processTxPipeline = fn(c.processTxPipeline)
+}
+
+func (c *baseClient) defaultProcessPipeline(cmds []Cmder) error {
+ return c.generalProcessPipeline(cmds, c.pipelineProcessCmds)
+}
+
+func (c *baseClient) defaultProcessTxPipeline(cmds []Cmder) error {
+ return c.generalProcessPipeline(cmds, c.txPipelineProcessCmds)
+}
+
+type pipelineProcessor func(*pool.Conn, []Cmder) (bool, error)
+
+func (c *baseClient) generalProcessPipeline(cmds []Cmder, p pipelineProcessor) error {
+ for attempt := 0; attempt <= c.opt.MaxRetries; attempt++ {
+ if attempt > 0 {
+ time.Sleep(c.retryBackoff(attempt))
+ }
+
+ cn, err := c.getConn()
+ if err != nil {
+ setCmdsErr(cmds, err)
+ return err
+ }
+
+ canRetry, err := p(cn, cmds)
+
+ if err == nil || internal.IsRedisError(err) {
+ c.connPool.Put(cn)
+ break
+ }
+ c.connPool.Remove(cn)
+
+ if !canRetry || !internal.IsRetryableError(err, true) {
+ break
+ }
+ }
+ return firstCmdsErr(cmds)
+}
+
+func (c *baseClient) pipelineProcessCmds(cn *pool.Conn, cmds []Cmder) (bool, error) {
+ cn.SetWriteTimeout(c.opt.WriteTimeout)
+ if err := writeCmd(cn, cmds...); err != nil {
+ setCmdsErr(cmds, err)
+ return true, err
+ }
+
+ // Set read timeout for all commands.
+ cn.SetReadTimeout(c.opt.ReadTimeout)
+ return true, pipelineReadCmds(cn, cmds)
+}
+
+func pipelineReadCmds(cn *pool.Conn, cmds []Cmder) error {
+ for _, cmd := range cmds {
+ err := cmd.readReply(cn)
+ if err != nil && !internal.IsRedisError(err) {
+ return err
+ }
+ }
+ return nil
+}
+
+func (c *baseClient) txPipelineProcessCmds(cn *pool.Conn, cmds []Cmder) (bool, error) {
+ cn.SetWriteTimeout(c.opt.WriteTimeout)
+ if err := txPipelineWriteMulti(cn, cmds); err != nil {
+ setCmdsErr(cmds, err)
+ return true, err
+ }
+
+ // Set read timeout for all commands.
+ cn.SetReadTimeout(c.opt.ReadTimeout)
+
+ if err := c.txPipelineReadQueued(cn, cmds); err != nil {
+ setCmdsErr(cmds, err)
+ return false, err
+ }
+
+ return false, pipelineReadCmds(cn, cmds)
+}
+
+func txPipelineWriteMulti(cn *pool.Conn, cmds []Cmder) error {
+ multiExec := make([]Cmder, 0, len(cmds)+2)
+ multiExec = append(multiExec, NewStatusCmd("MULTI"))
+ multiExec = append(multiExec, cmds...)
+ multiExec = append(multiExec, NewSliceCmd("EXEC"))
+ return writeCmd(cn, multiExec...)
+}
+
+func (c *baseClient) txPipelineReadQueued(cn *pool.Conn, cmds []Cmder) error {
+ // Parse queued replies.
+ var statusCmd StatusCmd
+ if err := statusCmd.readReply(cn); err != nil {
+ return err
+ }
+
+ for _ = range cmds {
+ err := statusCmd.readReply(cn)
+ if err != nil && !internal.IsRedisError(err) {
+ return err
+ }
+ }
+
+ // Parse number of replies.
+ line, err := cn.Rd.ReadLine()
+ if err != nil {
+ if err == Nil {
+ err = TxFailedErr
+ }
+ return err
+ }
+
+ switch line[0] {
+ case proto.ErrorReply:
+ return proto.ParseErrorReply(line)
+ case proto.ArrayReply:
+ // ok
+ default:
+ err := fmt.Errorf("redis: expected '*', but got line %q", line)
+ return err
+ }
+
+ return nil
+}
+
+//------------------------------------------------------------------------------
+
+// Client is a Redis client representing a pool of zero or more
+// underlying connections. It's safe for concurrent use by multiple
+// goroutines.
+type Client struct {
+ baseClient
+ cmdable
+
+ ctx context.Context
+}
+
+// NewClient returns a client to the Redis Server specified by Options.
+func NewClient(opt *Options) *Client {
+ opt.init()
+
+ c := Client{
+ baseClient: baseClient{
+ opt: opt,
+ connPool: newConnPool(opt),
+ },
+ }
+ c.baseClient.init()
+ c.init()
+
+ return &c
+}
+
+func (c *Client) init() {
+ c.cmdable.setProcessor(c.Process)
+}
+
+func (c *Client) Context() context.Context {
+ if c.ctx != nil {
+ return c.ctx
+ }
+ return context.Background()
+}
+
+func (c *Client) WithContext(ctx context.Context) *Client {
+ if ctx == nil {
+ panic("nil context")
+ }
+ c2 := c.copy()
+ c2.ctx = ctx
+ return c2
+}
+
+func (c *Client) copy() *Client {
+ cp := *c
+ cp.init()
+ return &cp
+}
+
+// Options returns read-only Options that were used to create the client.
+func (c *Client) Options() *Options {
+ return c.opt
+}
+
+type PoolStats pool.Stats
+
+// PoolStats returns connection pool stats.
+func (c *Client) PoolStats() *PoolStats {
+ stats := c.connPool.Stats()
+ return (*PoolStats)(stats)
+}
+
+func (c *Client) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ return c.Pipeline().Pipelined(fn)
+}
+
+func (c *Client) Pipeline() Pipeliner {
+ pipe := Pipeline{
+ exec: c.processPipeline,
+ }
+ pipe.statefulCmdable.setProcessor(pipe.Process)
+ return &pipe
+}
+
+func (c *Client) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ return c.TxPipeline().Pipelined(fn)
+}
+
+// TxPipeline acts like Pipeline, but wraps queued commands with MULTI/EXEC.
+func (c *Client) TxPipeline() Pipeliner {
+ pipe := Pipeline{
+ exec: c.processTxPipeline,
+ }
+ pipe.statefulCmdable.setProcessor(pipe.Process)
+ return &pipe
+}
+
+func (c *Client) pubSub() *PubSub {
+ pubsub := &PubSub{
+ opt: c.opt,
+
+ newConn: func(channels []string) (*pool.Conn, error) {
+ return c.newConn()
+ },
+ closeConn: c.connPool.CloseConn,
+ }
+ pubsub.init()
+ return pubsub
+}
+
+// Subscribe subscribes the client to the specified channels.
+// Channels can be omitted to create empty subscription.
+func (c *Client) Subscribe(channels ...string) *PubSub {
+ pubsub := c.pubSub()
+ if len(channels) > 0 {
+ _ = pubsub.Subscribe(channels...)
+ }
+ return pubsub
+}
+
+// PSubscribe subscribes the client to the given patterns.
+// Patterns can be omitted to create empty subscription.
+func (c *Client) PSubscribe(channels ...string) *PubSub {
+ pubsub := c.pubSub()
+ if len(channels) > 0 {
+ _ = pubsub.PSubscribe(channels...)
+ }
+ return pubsub
+}
+
+//------------------------------------------------------------------------------
+
+// Conn is like Client, but its pool contains single connection.
+type Conn struct {
+ baseClient
+ statefulCmdable
+}
+
+func newConn(opt *Options, cn *pool.Conn) *Conn {
+ c := Conn{
+ baseClient: baseClient{
+ opt: opt,
+ connPool: pool.NewSingleConnPool(cn),
+ },
+ }
+ c.baseClient.init()
+ c.statefulCmdable.setProcessor(c.Process)
+ return &c
+}
+
+func (c *Conn) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ return c.Pipeline().Pipelined(fn)
+}
+
+func (c *Conn) Pipeline() Pipeliner {
+ pipe := Pipeline{
+ exec: c.processPipeline,
+ }
+ pipe.statefulCmdable.setProcessor(pipe.Process)
+ return &pipe
+}
+
+func (c *Conn) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ return c.TxPipeline().Pipelined(fn)
+}
+
+// TxPipeline acts like Pipeline, but wraps queued commands with MULTI/EXEC.
+func (c *Conn) TxPipeline() Pipeliner {
+ pipe := Pipeline{
+ exec: c.processTxPipeline,
+ }
+ pipe.statefulCmdable.setProcessor(pipe.Process)
+ return &pipe
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/result.go b/src/dma/vendor/github.com/go-redis/redis/result.go
new file mode 100644
index 00000000..e086e8e3
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/result.go
@@ -0,0 +1,140 @@
+package redis
+
+import "time"
+
+// NewCmdResult returns a Cmd initialised with val and err for testing
+func NewCmdResult(val interface{}, err error) *Cmd {
+ var cmd Cmd
+ cmd.val = val
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewSliceResult returns a SliceCmd initialised with val and err for testing
+func NewSliceResult(val []interface{}, err error) *SliceCmd {
+ var cmd SliceCmd
+ cmd.val = val
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewStatusResult returns a StatusCmd initialised with val and err for testing
+func NewStatusResult(val string, err error) *StatusCmd {
+ var cmd StatusCmd
+ cmd.val = val
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewIntResult returns an IntCmd initialised with val and err for testing
+func NewIntResult(val int64, err error) *IntCmd {
+ var cmd IntCmd
+ cmd.val = val
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewDurationResult returns a DurationCmd initialised with val and err for testing
+func NewDurationResult(val time.Duration, err error) *DurationCmd {
+ var cmd DurationCmd
+ cmd.val = val
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewBoolResult returns a BoolCmd initialised with val and err for testing
+func NewBoolResult(val bool, err error) *BoolCmd {
+ var cmd BoolCmd
+ cmd.val = val
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewStringResult returns a StringCmd initialised with val and err for testing
+func NewStringResult(val string, err error) *StringCmd {
+ var cmd StringCmd
+ cmd.val = []byte(val)
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewFloatResult returns a FloatCmd initialised with val and err for testing
+func NewFloatResult(val float64, err error) *FloatCmd {
+ var cmd FloatCmd
+ cmd.val = val
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewStringSliceResult returns a StringSliceCmd initialised with val and err for testing
+func NewStringSliceResult(val []string, err error) *StringSliceCmd {
+ var cmd StringSliceCmd
+ cmd.val = val
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewBoolSliceResult returns a BoolSliceCmd initialised with val and err for testing
+func NewBoolSliceResult(val []bool, err error) *BoolSliceCmd {
+ var cmd BoolSliceCmd
+ cmd.val = val
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewStringStringMapResult returns a StringStringMapCmd initialised with val and err for testing
+func NewStringStringMapResult(val map[string]string, err error) *StringStringMapCmd {
+ var cmd StringStringMapCmd
+ cmd.val = val
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewStringIntMapCmdResult returns a StringIntMapCmd initialised with val and err for testing
+func NewStringIntMapCmdResult(val map[string]int64, err error) *StringIntMapCmd {
+ var cmd StringIntMapCmd
+ cmd.val = val
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewZSliceCmdResult returns a ZSliceCmd initialised with val and err for testing
+func NewZSliceCmdResult(val []Z, err error) *ZSliceCmd {
+ var cmd ZSliceCmd
+ cmd.val = val
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewScanCmdResult returns a ScanCmd initialised with val and err for testing
+func NewScanCmdResult(keys []string, cursor uint64, err error) *ScanCmd {
+ var cmd ScanCmd
+ cmd.page = keys
+ cmd.cursor = cursor
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewClusterSlotsCmdResult returns a ClusterSlotsCmd initialised with val and err for testing
+func NewClusterSlotsCmdResult(val []ClusterSlot, err error) *ClusterSlotsCmd {
+ var cmd ClusterSlotsCmd
+ cmd.val = val
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewGeoLocationCmdResult returns a GeoLocationCmd initialised with val and err for testing
+func NewGeoLocationCmdResult(val []GeoLocation, err error) *GeoLocationCmd {
+ var cmd GeoLocationCmd
+ cmd.locations = val
+ cmd.setErr(err)
+ return &cmd
+}
+
+// NewCommandsInfoCmdResult returns a CommandsInfoCmd initialised with val and err for testing
+func NewCommandsInfoCmdResult(val map[string]*CommandInfo, err error) *CommandsInfoCmd {
+ var cmd CommandsInfoCmd
+ cmd.val = val
+ cmd.setErr(err)
+ return &cmd
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/ring.go b/src/dma/vendor/github.com/go-redis/redis/ring.go
new file mode 100644
index 00000000..ef855115
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/ring.go
@@ -0,0 +1,622 @@
+package redis
+
+import (
+ "context"
+ "errors"
+ "fmt"
+ "math/rand"
+ "strconv"
+ "sync"
+ "sync/atomic"
+ "time"
+
+ "github.com/go-redis/redis/internal"
+ "github.com/go-redis/redis/internal/consistenthash"
+ "github.com/go-redis/redis/internal/hashtag"
+ "github.com/go-redis/redis/internal/pool"
+)
+
+// Hash is type of hash function used in consistent hash.
+type Hash consistenthash.Hash
+
+var errRingShardsDown = errors.New("redis: all ring shards are down")
+
+// RingOptions are used to configure a ring client and should be
+// passed to NewRing.
+type RingOptions struct {
+ // Map of name => host:port addresses of ring shards.
+ Addrs map[string]string
+
+ // Frequency of PING commands sent to check shards availability.
+ // Shard is considered down after 3 subsequent failed checks.
+ HeartbeatFrequency time.Duration
+
+ // Hash function used in consistent hash.
+ // Default is crc32.ChecksumIEEE.
+ Hash Hash
+
+ // Number of replicas in consistent hash.
+ // Default is 100 replicas.
+ //
+ // Higher number of replicas will provide less deviation, that is keys will be
+ // distributed to nodes more evenly.
+ //
+ // Following is deviation for common nreplicas:
+ // --------------------------------------------------------
+ // | nreplicas | standard error | 99% confidence interval |
+ // | 10 | 0.3152 | (0.37, 1.98) |
+ // | 100 | 0.0997 | (0.76, 1.28) |
+ // | 1000 | 0.0316 | (0.92, 1.09) |
+ // --------------------------------------------------------
+ //
+ // See https://arxiv.org/abs/1406.2294 for reference
+ HashReplicas int
+
+ // Following options are copied from Options struct.
+
+ OnConnect func(*Conn) error
+
+ DB int
+ Password string
+
+ MaxRetries int
+ MinRetryBackoff time.Duration
+ MaxRetryBackoff time.Duration
+
+ DialTimeout time.Duration
+ ReadTimeout time.Duration
+ WriteTimeout time.Duration
+
+ PoolSize int
+ PoolTimeout time.Duration
+ IdleTimeout time.Duration
+ IdleCheckFrequency time.Duration
+}
+
+func (opt *RingOptions) init() {
+ if opt.HeartbeatFrequency == 0 {
+ opt.HeartbeatFrequency = 500 * time.Millisecond
+ }
+
+ if opt.HashReplicas == 0 {
+ opt.HashReplicas = 100
+ }
+
+ switch opt.MinRetryBackoff {
+ case -1:
+ opt.MinRetryBackoff = 0
+ case 0:
+ opt.MinRetryBackoff = 8 * time.Millisecond
+ }
+ switch opt.MaxRetryBackoff {
+ case -1:
+ opt.MaxRetryBackoff = 0
+ case 0:
+ opt.MaxRetryBackoff = 512 * time.Millisecond
+ }
+}
+
+func (opt *RingOptions) clientOptions() *Options {
+ return &Options{
+ OnConnect: opt.OnConnect,
+
+ DB: opt.DB,
+ Password: opt.Password,
+
+ DialTimeout: opt.DialTimeout,
+ ReadTimeout: opt.ReadTimeout,
+ WriteTimeout: opt.WriteTimeout,
+
+ PoolSize: opt.PoolSize,
+ PoolTimeout: opt.PoolTimeout,
+ IdleTimeout: opt.IdleTimeout,
+ IdleCheckFrequency: opt.IdleCheckFrequency,
+ }
+}
+
+//------------------------------------------------------------------------------
+
+type ringShard struct {
+ Client *Client
+ down int32
+}
+
+func (shard *ringShard) String() string {
+ var state string
+ if shard.IsUp() {
+ state = "up"
+ } else {
+ state = "down"
+ }
+ return fmt.Sprintf("%s is %s", shard.Client, state)
+}
+
+func (shard *ringShard) IsDown() bool {
+ const threshold = 3
+ return atomic.LoadInt32(&shard.down) >= threshold
+}
+
+func (shard *ringShard) IsUp() bool {
+ return !shard.IsDown()
+}
+
+// Vote votes to set shard state and returns true if state was changed.
+func (shard *ringShard) Vote(up bool) bool {
+ if up {
+ changed := shard.IsDown()
+ atomic.StoreInt32(&shard.down, 0)
+ return changed
+ }
+
+ if shard.IsDown() {
+ return false
+ }
+
+ atomic.AddInt32(&shard.down, 1)
+ return shard.IsDown()
+}
+
+//------------------------------------------------------------------------------
+
+type ringShards struct {
+ opt *RingOptions
+
+ mu sync.RWMutex
+ hash *consistenthash.Map
+ shards map[string]*ringShard // read only
+ list []*ringShard // read only
+ len int
+ closed bool
+}
+
+func newRingShards(opt *RingOptions) *ringShards {
+ return &ringShards{
+ opt: opt,
+
+ hash: newConsistentHash(opt),
+ shards: make(map[string]*ringShard),
+ }
+}
+
+func (c *ringShards) Add(name string, cl *Client) {
+ shard := &ringShard{Client: cl}
+ c.hash.Add(name)
+ c.shards[name] = shard
+ c.list = append(c.list, shard)
+}
+
+func (c *ringShards) List() []*ringShard {
+ c.mu.RLock()
+ list := c.list
+ c.mu.RUnlock()
+ return list
+}
+
+func (c *ringShards) Hash(key string) string {
+ c.mu.RLock()
+ hash := c.hash.Get(key)
+ c.mu.RUnlock()
+ return hash
+}
+
+func (c *ringShards) GetByKey(key string) (*ringShard, error) {
+ key = hashtag.Key(key)
+
+ c.mu.RLock()
+
+ if c.closed {
+ c.mu.RUnlock()
+ return nil, pool.ErrClosed
+ }
+
+ hash := c.hash.Get(key)
+ if hash == "" {
+ c.mu.RUnlock()
+ return nil, errRingShardsDown
+ }
+
+ shard := c.shards[hash]
+ c.mu.RUnlock()
+
+ return shard, nil
+}
+
+func (c *ringShards) GetByHash(name string) (*ringShard, error) {
+ if name == "" {
+ return c.Random()
+ }
+
+ c.mu.RLock()
+ shard := c.shards[name]
+ c.mu.RUnlock()
+ return shard, nil
+}
+
+func (c *ringShards) Random() (*ringShard, error) {
+ return c.GetByKey(strconv.Itoa(rand.Int()))
+}
+
+// heartbeat monitors state of each shard in the ring.
+func (c *ringShards) Heartbeat(frequency time.Duration) {
+ ticker := time.NewTicker(frequency)
+ defer ticker.Stop()
+ for range ticker.C {
+ var rebalance bool
+
+ c.mu.RLock()
+
+ if c.closed {
+ c.mu.RUnlock()
+ break
+ }
+
+ shards := c.list
+ c.mu.RUnlock()
+
+ for _, shard := range shards {
+ err := shard.Client.Ping().Err()
+ if shard.Vote(err == nil || err == pool.ErrPoolTimeout) {
+ internal.Logf("ring shard state changed: %s", shard)
+ rebalance = true
+ }
+ }
+
+ if rebalance {
+ c.rebalance()
+ }
+ }
+}
+
+// rebalance removes dead shards from the Ring.
+func (c *ringShards) rebalance() {
+ hash := newConsistentHash(c.opt)
+ var shardsNum int
+ for name, shard := range c.shards {
+ if shard.IsUp() {
+ hash.Add(name)
+ shardsNum++
+ }
+ }
+
+ c.mu.Lock()
+ c.hash = hash
+ c.len = shardsNum
+ c.mu.Unlock()
+}
+
+func (c *ringShards) Len() int {
+ c.mu.RLock()
+ l := c.len
+ c.mu.RUnlock()
+ return l
+}
+
+func (c *ringShards) Close() error {
+ c.mu.Lock()
+ defer c.mu.Unlock()
+
+ if c.closed {
+ return nil
+ }
+ c.closed = true
+
+ var firstErr error
+ for _, shard := range c.shards {
+ if err := shard.Client.Close(); err != nil && firstErr == nil {
+ firstErr = err
+ }
+ }
+ c.hash = nil
+ c.shards = nil
+ c.list = nil
+
+ return firstErr
+}
+
+//------------------------------------------------------------------------------
+
+// Ring is a Redis client that uses constistent hashing to distribute
+// keys across multiple Redis servers (shards). It's safe for
+// concurrent use by multiple goroutines.
+//
+// Ring monitors the state of each shard and removes dead shards from
+// the ring. When shard comes online it is added back to the ring. This
+// gives you maximum availability and partition tolerance, but no
+// consistency between different shards or even clients. Each client
+// uses shards that are available to the client and does not do any
+// coordination when shard state is changed.
+//
+// Ring should be used when you need multiple Redis servers for caching
+// and can tolerate losing data when one of the servers dies.
+// Otherwise you should use Redis Cluster.
+type Ring struct {
+ cmdable
+
+ ctx context.Context
+
+ opt *RingOptions
+ shards *ringShards
+ cmdsInfoCache *cmdsInfoCache
+
+ processPipeline func([]Cmder) error
+}
+
+func NewRing(opt *RingOptions) *Ring {
+ opt.init()
+
+ ring := &Ring{
+ opt: opt,
+ shards: newRingShards(opt),
+ }
+ ring.cmdsInfoCache = newCmdsInfoCache(ring.cmdsInfo)
+
+ ring.processPipeline = ring.defaultProcessPipeline
+ ring.cmdable.setProcessor(ring.Process)
+
+ for name, addr := range opt.Addrs {
+ clopt := opt.clientOptions()
+ clopt.Addr = addr
+ ring.shards.Add(name, NewClient(clopt))
+ }
+
+ go ring.shards.Heartbeat(opt.HeartbeatFrequency)
+
+ return ring
+}
+
+func (c *Ring) Context() context.Context {
+ if c.ctx != nil {
+ return c.ctx
+ }
+ return context.Background()
+}
+
+func (c *Ring) WithContext(ctx context.Context) *Ring {
+ if ctx == nil {
+ panic("nil context")
+ }
+ c2 := c.copy()
+ c2.ctx = ctx
+ return c2
+}
+
+func (c *Ring) copy() *Ring {
+ cp := *c
+ return &cp
+}
+
+// Options returns read-only Options that were used to create the client.
+func (c *Ring) Options() *RingOptions {
+ return c.opt
+}
+
+func (c *Ring) retryBackoff(attempt int) time.Duration {
+ return internal.RetryBackoff(attempt, c.opt.MinRetryBackoff, c.opt.MaxRetryBackoff)
+}
+
+// PoolStats returns accumulated connection pool stats.
+func (c *Ring) PoolStats() *PoolStats {
+ shards := c.shards.List()
+ var acc PoolStats
+ for _, shard := range shards {
+ s := shard.Client.connPool.Stats()
+ acc.Hits += s.Hits
+ acc.Misses += s.Misses
+ acc.Timeouts += s.Timeouts
+ acc.TotalConns += s.TotalConns
+ acc.FreeConns += s.FreeConns
+ }
+ return &acc
+}
+
+// Len returns the current number of shards in the ring.
+func (c *Ring) Len() int {
+ return c.shards.Len()
+}
+
+// Subscribe subscribes the client to the specified channels.
+func (c *Ring) Subscribe(channels ...string) *PubSub {
+ if len(channels) == 0 {
+ panic("at least one channel is required")
+ }
+
+ shard, err := c.shards.GetByKey(channels[0])
+ if err != nil {
+ // TODO: return PubSub with sticky error
+ panic(err)
+ }
+ return shard.Client.Subscribe(channels...)
+}
+
+// PSubscribe subscribes the client to the given patterns.
+func (c *Ring) PSubscribe(channels ...string) *PubSub {
+ if len(channels) == 0 {
+ panic("at least one channel is required")
+ }
+
+ shard, err := c.shards.GetByKey(channels[0])
+ if err != nil {
+ // TODO: return PubSub with sticky error
+ panic(err)
+ }
+ return shard.Client.PSubscribe(channels...)
+}
+
+// ForEachShard concurrently calls the fn on each live shard in the ring.
+// It returns the first error if any.
+func (c *Ring) ForEachShard(fn func(client *Client) error) error {
+ shards := c.shards.List()
+ var wg sync.WaitGroup
+ errCh := make(chan error, 1)
+ for _, shard := range shards {
+ if shard.IsDown() {
+ continue
+ }
+
+ wg.Add(1)
+ go func(shard *ringShard) {
+ defer wg.Done()
+ err := fn(shard.Client)
+ if err != nil {
+ select {
+ case errCh <- err:
+ default:
+ }
+ }
+ }(shard)
+ }
+ wg.Wait()
+
+ select {
+ case err := <-errCh:
+ return err
+ default:
+ return nil
+ }
+}
+
+func (c *Ring) cmdsInfo() (map[string]*CommandInfo, error) {
+ shards := c.shards.List()
+ firstErr := errRingShardsDown
+ for _, shard := range shards {
+ cmdsInfo, err := shard.Client.Command().Result()
+ if err == nil {
+ return cmdsInfo, nil
+ }
+ if firstErr == nil {
+ firstErr = err
+ }
+ }
+ return nil, firstErr
+}
+
+func (c *Ring) cmdInfo(name string) *CommandInfo {
+ cmdsInfo, err := c.cmdsInfoCache.Get()
+ if err != nil {
+ return nil
+ }
+ info := cmdsInfo[name]
+ if info == nil {
+ internal.Logf("info for cmd=%s not found", name)
+ }
+ return info
+}
+
+func (c *Ring) cmdShard(cmd Cmder) (*ringShard, error) {
+ cmdInfo := c.cmdInfo(cmd.Name())
+ pos := cmdFirstKeyPos(cmd, cmdInfo)
+ if pos == 0 {
+ return c.shards.Random()
+ }
+ firstKey := cmd.stringArg(pos)
+ return c.shards.GetByKey(firstKey)
+}
+
+func (c *Ring) WrapProcess(fn func(oldProcess func(cmd Cmder) error) func(cmd Cmder) error) {
+ c.ForEachShard(func(c *Client) error {
+ c.WrapProcess(fn)
+ return nil
+ })
+}
+
+func (c *Ring) Process(cmd Cmder) error {
+ shard, err := c.cmdShard(cmd)
+ if err != nil {
+ cmd.setErr(err)
+ return err
+ }
+ return shard.Client.Process(cmd)
+}
+
+func (c *Ring) Pipeline() Pipeliner {
+ pipe := Pipeline{
+ exec: c.processPipeline,
+ }
+ pipe.cmdable.setProcessor(pipe.Process)
+ return &pipe
+}
+
+func (c *Ring) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ return c.Pipeline().Pipelined(fn)
+}
+
+func (c *Ring) WrapProcessPipeline(
+ fn func(oldProcess func([]Cmder) error) func([]Cmder) error,
+) {
+ c.processPipeline = fn(c.processPipeline)
+}
+
+func (c *Ring) defaultProcessPipeline(cmds []Cmder) error {
+ cmdsMap := make(map[string][]Cmder)
+ for _, cmd := range cmds {
+ cmdInfo := c.cmdInfo(cmd.Name())
+ hash := cmd.stringArg(cmdFirstKeyPos(cmd, cmdInfo))
+ if hash != "" {
+ hash = c.shards.Hash(hashtag.Key(hash))
+ }
+ cmdsMap[hash] = append(cmdsMap[hash], cmd)
+ }
+
+ for attempt := 0; attempt <= c.opt.MaxRetries; attempt++ {
+ if attempt > 0 {
+ time.Sleep(c.retryBackoff(attempt))
+ }
+
+ var failedCmdsMap map[string][]Cmder
+
+ for hash, cmds := range cmdsMap {
+ shard, err := c.shards.GetByHash(hash)
+ if err != nil {
+ setCmdsErr(cmds, err)
+ continue
+ }
+
+ cn, err := shard.Client.getConn()
+ if err != nil {
+ setCmdsErr(cmds, err)
+ continue
+ }
+
+ canRetry, err := shard.Client.pipelineProcessCmds(cn, cmds)
+ if err == nil || internal.IsRedisError(err) {
+ shard.Client.connPool.Put(cn)
+ continue
+ }
+ shard.Client.connPool.Remove(cn)
+
+ if canRetry && internal.IsRetryableError(err, true) {
+ if failedCmdsMap == nil {
+ failedCmdsMap = make(map[string][]Cmder)
+ }
+ failedCmdsMap[hash] = cmds
+ }
+ }
+
+ if len(failedCmdsMap) == 0 {
+ break
+ }
+ cmdsMap = failedCmdsMap
+ }
+
+ return firstCmdsErr(cmds)
+}
+
+func (c *Ring) TxPipeline() Pipeliner {
+ panic("not implemented")
+}
+
+func (c *Ring) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ panic("not implemented")
+}
+
+// Close closes the ring client, releasing any open resources.
+//
+// It is rare to Close a Ring, as the Ring is meant to be long-lived
+// and shared between many goroutines.
+func (c *Ring) Close() error {
+ return c.shards.Close()
+}
+
+func newConsistentHash(opt *RingOptions) *consistenthash.Map {
+ return consistenthash.New(opt.HashReplicas, consistenthash.Hash(opt.Hash))
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/script.go b/src/dma/vendor/github.com/go-redis/redis/script.go
new file mode 100644
index 00000000..09f36d93
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/script.go
@@ -0,0 +1,62 @@
+package redis
+
+import (
+ "crypto/sha1"
+ "encoding/hex"
+ "io"
+ "strings"
+)
+
+type scripter interface {
+ Eval(script string, keys []string, args ...interface{}) *Cmd
+ EvalSha(sha1 string, keys []string, args ...interface{}) *Cmd
+ ScriptExists(hashes ...string) *BoolSliceCmd
+ ScriptLoad(script string) *StringCmd
+}
+
+var _ scripter = (*Client)(nil)
+var _ scripter = (*Ring)(nil)
+var _ scripter = (*ClusterClient)(nil)
+
+type Script struct {
+ src, hash string
+}
+
+func NewScript(src string) *Script {
+ h := sha1.New()
+ io.WriteString(h, src)
+ return &Script{
+ src: src,
+ hash: hex.EncodeToString(h.Sum(nil)),
+ }
+}
+
+func (s *Script) Hash() string {
+ return s.hash
+}
+
+func (s *Script) Load(c scripter) *StringCmd {
+ return c.ScriptLoad(s.src)
+}
+
+func (s *Script) Exists(c scripter) *BoolSliceCmd {
+ return c.ScriptExists(s.hash)
+}
+
+func (s *Script) Eval(c scripter, keys []string, args ...interface{}) *Cmd {
+ return c.Eval(s.src, keys, args...)
+}
+
+func (s *Script) EvalSha(c scripter, keys []string, args ...interface{}) *Cmd {
+ return c.EvalSha(s.hash, keys, args...)
+}
+
+// Run optimistically uses EVALSHA to run the script. If script does not exist
+// it is retried using EVAL.
+func (s *Script) Run(c scripter, keys []string, args ...interface{}) *Cmd {
+ r := s.EvalSha(c, keys, args...)
+ if err := r.Err(); err != nil && strings.HasPrefix(err.Error(), "NOSCRIPT ") {
+ return s.Eval(c, keys, args...)
+ }
+ return r
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/sentinel.go b/src/dma/vendor/github.com/go-redis/redis/sentinel.go
new file mode 100644
index 00000000..12c29a71
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/sentinel.go
@@ -0,0 +1,343 @@
+package redis
+
+import (
+ "crypto/tls"
+ "errors"
+ "net"
+ "strings"
+ "sync"
+ "time"
+
+ "github.com/go-redis/redis/internal"
+ "github.com/go-redis/redis/internal/pool"
+)
+
+//------------------------------------------------------------------------------
+
+// FailoverOptions are used to configure a failover client and should
+// be passed to NewFailoverClient.
+type FailoverOptions struct {
+ // The master name.
+ MasterName string
+ // A seed list of host:port addresses of sentinel nodes.
+ SentinelAddrs []string
+
+ // Following options are copied from Options struct.
+
+ OnConnect func(*Conn) error
+
+ Password string
+ DB int
+
+ MaxRetries int
+
+ DialTimeout time.Duration
+ ReadTimeout time.Duration
+ WriteTimeout time.Duration
+
+ PoolSize int
+ PoolTimeout time.Duration
+ IdleTimeout time.Duration
+ IdleCheckFrequency time.Duration
+
+ TLSConfig *tls.Config
+}
+
+func (opt *FailoverOptions) options() *Options {
+ return &Options{
+ Addr: "FailoverClient",
+
+ OnConnect: opt.OnConnect,
+
+ DB: opt.DB,
+ Password: opt.Password,
+
+ MaxRetries: opt.MaxRetries,
+
+ DialTimeout: opt.DialTimeout,
+ ReadTimeout: opt.ReadTimeout,
+ WriteTimeout: opt.WriteTimeout,
+
+ PoolSize: opt.PoolSize,
+ PoolTimeout: opt.PoolTimeout,
+ IdleTimeout: opt.IdleTimeout,
+ IdleCheckFrequency: opt.IdleCheckFrequency,
+
+ TLSConfig: opt.TLSConfig,
+ }
+}
+
+// NewFailoverClient returns a Redis client that uses Redis Sentinel
+// for automatic failover. It's safe for concurrent use by multiple
+// goroutines.
+func NewFailoverClient(failoverOpt *FailoverOptions) *Client {
+ opt := failoverOpt.options()
+ opt.init()
+
+ failover := &sentinelFailover{
+ masterName: failoverOpt.MasterName,
+ sentinelAddrs: failoverOpt.SentinelAddrs,
+
+ opt: opt,
+ }
+
+ c := Client{
+ baseClient: baseClient{
+ opt: opt,
+ connPool: failover.Pool(),
+
+ onClose: func() error {
+ return failover.Close()
+ },
+ },
+ }
+ c.baseClient.init()
+ c.setProcessor(c.Process)
+
+ return &c
+}
+
+//------------------------------------------------------------------------------
+
+type SentinelClient struct {
+ baseClient
+}
+
+func NewSentinelClient(opt *Options) *SentinelClient {
+ opt.init()
+ c := &SentinelClient{
+ baseClient: baseClient{
+ opt: opt,
+ connPool: newConnPool(opt),
+ },
+ }
+ c.baseClient.init()
+ return c
+}
+
+func (c *SentinelClient) PubSub() *PubSub {
+ pubsub := &PubSub{
+ opt: c.opt,
+
+ newConn: func(channels []string) (*pool.Conn, error) {
+ return c.newConn()
+ },
+ closeConn: c.connPool.CloseConn,
+ }
+ pubsub.init()
+ return pubsub
+}
+
+func (c *SentinelClient) GetMasterAddrByName(name string) *StringSliceCmd {
+ cmd := NewStringSliceCmd("SENTINEL", "get-master-addr-by-name", name)
+ c.Process(cmd)
+ return cmd
+}
+
+func (c *SentinelClient) Sentinels(name string) *SliceCmd {
+ cmd := NewSliceCmd("SENTINEL", "sentinels", name)
+ c.Process(cmd)
+ return cmd
+}
+
+type sentinelFailover struct {
+ sentinelAddrs []string
+
+ opt *Options
+
+ pool *pool.ConnPool
+ poolOnce sync.Once
+
+ mu sync.RWMutex
+ masterName string
+ _masterAddr string
+ sentinel *SentinelClient
+}
+
+func (d *sentinelFailover) Close() error {
+ return d.resetSentinel()
+}
+
+func (d *sentinelFailover) Pool() *pool.ConnPool {
+ d.poolOnce.Do(func() {
+ d.opt.Dialer = d.dial
+ d.pool = newConnPool(d.opt)
+ })
+ return d.pool
+}
+
+func (d *sentinelFailover) dial() (net.Conn, error) {
+ addr, err := d.MasterAddr()
+ if err != nil {
+ return nil, err
+ }
+ return net.DialTimeout("tcp", addr, d.opt.DialTimeout)
+}
+
+func (d *sentinelFailover) MasterAddr() (string, error) {
+ d.mu.Lock()
+ defer d.mu.Unlock()
+
+ addr, err := d.masterAddr()
+ if err != nil {
+ return "", err
+ }
+ d._switchMaster(addr)
+
+ return addr, nil
+}
+
+func (d *sentinelFailover) masterAddr() (string, error) {
+ // Try last working sentinel.
+ if d.sentinel != nil {
+ addr, err := d.sentinel.GetMasterAddrByName(d.masterName).Result()
+ if err == nil {
+ addr := net.JoinHostPort(addr[0], addr[1])
+ return addr, nil
+ }
+
+ internal.Logf("sentinel: GetMasterAddrByName name=%q failed: %s",
+ d.masterName, err)
+ d._resetSentinel()
+ }
+
+ for i, sentinelAddr := range d.sentinelAddrs {
+ sentinel := NewSentinelClient(&Options{
+ Addr: sentinelAddr,
+
+ DialTimeout: d.opt.DialTimeout,
+ ReadTimeout: d.opt.ReadTimeout,
+ WriteTimeout: d.opt.WriteTimeout,
+
+ PoolSize: d.opt.PoolSize,
+ PoolTimeout: d.opt.PoolTimeout,
+ IdleTimeout: d.opt.IdleTimeout,
+ })
+
+ masterAddr, err := sentinel.GetMasterAddrByName(d.masterName).Result()
+ if err != nil {
+ internal.Logf("sentinel: GetMasterAddrByName master=%q failed: %s",
+ d.masterName, err)
+ sentinel.Close()
+ continue
+ }
+
+ // Push working sentinel to the top.
+ d.sentinelAddrs[0], d.sentinelAddrs[i] = d.sentinelAddrs[i], d.sentinelAddrs[0]
+ d.setSentinel(sentinel)
+
+ addr := net.JoinHostPort(masterAddr[0], masterAddr[1])
+ return addr, nil
+ }
+
+ return "", errors.New("redis: all sentinels are unreachable")
+}
+
+func (c *sentinelFailover) switchMaster(addr string) {
+ c.mu.Lock()
+ c._switchMaster(addr)
+ c.mu.Unlock()
+}
+
+func (c *sentinelFailover) _switchMaster(addr string) {
+ if c._masterAddr == addr {
+ return
+ }
+
+ internal.Logf("sentinel: new master=%q addr=%q",
+ c.masterName, addr)
+ _ = c.Pool().Filter(func(cn *pool.Conn) bool {
+ return cn.RemoteAddr().String() != addr
+ })
+ c._masterAddr = addr
+}
+
+func (d *sentinelFailover) setSentinel(sentinel *SentinelClient) {
+ d.discoverSentinels(sentinel)
+ d.sentinel = sentinel
+ go d.listen(sentinel)
+}
+
+func (d *sentinelFailover) resetSentinel() error {
+ var err error
+ d.mu.Lock()
+ if d.sentinel != nil {
+ err = d._resetSentinel()
+ }
+ d.mu.Unlock()
+ return err
+}
+
+func (d *sentinelFailover) _resetSentinel() error {
+ err := d.sentinel.Close()
+ d.sentinel = nil
+ return err
+}
+
+func (d *sentinelFailover) discoverSentinels(sentinel *SentinelClient) {
+ sentinels, err := sentinel.Sentinels(d.masterName).Result()
+ if err != nil {
+ internal.Logf("sentinel: Sentinels master=%q failed: %s", d.masterName, err)
+ return
+ }
+ for _, sentinel := range sentinels {
+ vals := sentinel.([]interface{})
+ for i := 0; i < len(vals); i += 2 {
+ key := vals[i].(string)
+ if key == "name" {
+ sentinelAddr := vals[i+1].(string)
+ if !contains(d.sentinelAddrs, sentinelAddr) {
+ internal.Logf(
+ "sentinel: discovered new sentinel=%q for master=%q",
+ sentinelAddr, d.masterName,
+ )
+ d.sentinelAddrs = append(d.sentinelAddrs, sentinelAddr)
+ }
+ }
+ }
+ }
+}
+
+func (d *sentinelFailover) listen(sentinel *SentinelClient) {
+ pubsub := sentinel.PubSub()
+ defer pubsub.Close()
+
+ err := pubsub.Subscribe("+switch-master")
+ if err != nil {
+ internal.Logf("sentinel: Subscribe failed: %s", err)
+ d.resetSentinel()
+ return
+ }
+
+ for {
+ msg, err := pubsub.ReceiveMessage()
+ if err != nil {
+ if err == pool.ErrClosed {
+ d.resetSentinel()
+ return
+ }
+ internal.Logf("sentinel: ReceiveMessage failed: %s", err)
+ continue
+ }
+
+ switch msg.Channel {
+ case "+switch-master":
+ parts := strings.Split(msg.Payload, " ")
+ if parts[0] != d.masterName {
+ internal.Logf("sentinel: ignore addr for master=%q", parts[0])
+ continue
+ }
+ addr := net.JoinHostPort(parts[3], parts[4])
+ d.switchMaster(addr)
+ }
+ }
+}
+
+func contains(slice []string, str string) bool {
+ for _, s := range slice {
+ if s == str {
+ return true
+ }
+ }
+ return false
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/tx.go b/src/dma/vendor/github.com/go-redis/redis/tx.go
new file mode 100644
index 00000000..6a7da99d
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/tx.go
@@ -0,0 +1,110 @@
+package redis
+
+import (
+ "github.com/go-redis/redis/internal/pool"
+ "github.com/go-redis/redis/internal/proto"
+)
+
+// TxFailedErr transaction redis failed.
+const TxFailedErr = proto.RedisError("redis: transaction failed")
+
+// Tx implements Redis transactions as described in
+// http://redis.io/topics/transactions. It's NOT safe for concurrent use
+// by multiple goroutines, because Exec resets list of watched keys.
+// If you don't need WATCH it is better to use Pipeline.
+type Tx struct {
+ statefulCmdable
+ baseClient
+}
+
+func (c *Client) newTx() *Tx {
+ tx := Tx{
+ baseClient: baseClient{
+ opt: c.opt,
+ connPool: pool.NewStickyConnPool(c.connPool.(*pool.ConnPool), true),
+ },
+ }
+ tx.baseClient.init()
+ tx.statefulCmdable.setProcessor(tx.Process)
+ return &tx
+}
+
+// Watch prepares a transcaction and marks the keys to be watched
+// for conditional execution if there are any keys.
+//
+// The transaction is automatically closed when the fn exits.
+func (c *Client) Watch(fn func(*Tx) error, keys ...string) error {
+ tx := c.newTx()
+ if len(keys) > 0 {
+ if err := tx.Watch(keys...).Err(); err != nil {
+ _ = tx.Close()
+ return err
+ }
+ }
+
+ err := fn(tx)
+ _ = tx.Close()
+ return err
+}
+
+// Close closes the transaction, releasing any open resources.
+func (c *Tx) Close() error {
+ _ = c.Unwatch().Err()
+ return c.baseClient.Close()
+}
+
+// Watch marks the keys to be watched for conditional execution
+// of a transaction.
+func (c *Tx) Watch(keys ...string) *StatusCmd {
+ args := make([]interface{}, 1+len(keys))
+ args[0] = "watch"
+ for i, key := range keys {
+ args[1+i] = key
+ }
+ cmd := NewStatusCmd(args...)
+ c.Process(cmd)
+ return cmd
+}
+
+// Unwatch flushes all the previously watched keys for a transaction.
+func (c *Tx) Unwatch(keys ...string) *StatusCmd {
+ args := make([]interface{}, 1+len(keys))
+ args[0] = "unwatch"
+ for i, key := range keys {
+ args[1+i] = key
+ }
+ cmd := NewStatusCmd(args...)
+ c.Process(cmd)
+ return cmd
+}
+
+// Pipeline creates a new pipeline. It is more convenient to use Pipelined.
+func (c *Tx) Pipeline() Pipeliner {
+ pipe := Pipeline{
+ exec: c.processTxPipeline,
+ }
+ pipe.statefulCmdable.setProcessor(pipe.Process)
+ return &pipe
+}
+
+// Pipelined executes commands queued in the fn in a transaction.
+//
+// When using WATCH, EXEC will execute commands only if the watched keys
+// were not modified, allowing for a check-and-set mechanism.
+//
+// Exec always returns list of commands. If transaction fails
+// TxFailedErr is returned. Otherwise Exec returns an error of the first
+// failed command or nil.
+func (c *Tx) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ return c.Pipeline().Pipelined(fn)
+}
+
+// TxPipelined is an alias for Pipelined.
+func (c *Tx) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
+ return c.Pipelined(fn)
+}
+
+// TxPipeline is an alias for Pipeline.
+func (c *Tx) TxPipeline() Pipeliner {
+ return c.Pipeline()
+}
diff --git a/src/dma/vendor/github.com/go-redis/redis/universal.go b/src/dma/vendor/github.com/go-redis/redis/universal.go
new file mode 100644
index 00000000..9e30c81d
--- /dev/null
+++ b/src/dma/vendor/github.com/go-redis/redis/universal.go
@@ -0,0 +1,151 @@
+package redis
+
+import (
+ "crypto/tls"
+ "time"
+)
+
+// UniversalOptions information is required by UniversalClient to establish
+// connections.
+type UniversalOptions struct {
+ // Either a single address or a seed list of host:port addresses
+ // of cluster/sentinel nodes.
+ Addrs []string
+
+ // The sentinel master name.
+ // Only failover clients.
+ MasterName string
+
+ // Database to be selected after connecting to the server.
+ // Only single-node and failover clients.
+ DB int
+
+ // Only cluster clients.
+
+ // Enables read only queries on slave nodes.
+ ReadOnly bool
+
+ MaxRedirects int
+ RouteByLatency bool
+
+ // Common options
+
+ OnConnect func(*Conn) error
+ MaxRetries int
+ Password string
+ DialTimeout time.Duration
+ ReadTimeout time.Duration
+ WriteTimeout time.Duration
+ PoolSize int
+ PoolTimeout time.Duration
+ IdleTimeout time.Duration
+ IdleCheckFrequency time.Duration
+ TLSConfig *tls.Config
+}
+
+func (o *UniversalOptions) cluster() *ClusterOptions {
+ if len(o.Addrs) == 0 {
+ o.Addrs = []string{"127.0.0.1:6379"}
+ }
+
+ return &ClusterOptions{
+ Addrs: o.Addrs,
+ MaxRedirects: o.MaxRedirects,
+ RouteByLatency: o.RouteByLatency,
+ ReadOnly: o.ReadOnly,
+
+ OnConnect: o.OnConnect,
+ MaxRetries: o.MaxRetries,
+ Password: o.Password,
+ DialTimeout: o.DialTimeout,
+ ReadTimeout: o.ReadTimeout,
+ WriteTimeout: o.WriteTimeout,
+ PoolSize: o.PoolSize,
+ PoolTimeout: o.PoolTimeout,
+ IdleTimeout: o.IdleTimeout,
+ IdleCheckFrequency: o.IdleCheckFrequency,
+ TLSConfig: o.TLSConfig,
+ }
+}
+
+func (o *UniversalOptions) failover() *FailoverOptions {
+ if len(o.Addrs) == 0 {
+ o.Addrs = []string{"127.0.0.1:26379"}
+ }
+
+ return &FailoverOptions{
+ SentinelAddrs: o.Addrs,
+ MasterName: o.MasterName,
+ DB: o.DB,
+
+ OnConnect: o.OnConnect,
+ MaxRetries: o.MaxRetries,
+ Password: o.Password,
+ DialTimeout: o.DialTimeout,
+ ReadTimeout: o.ReadTimeout,
+ WriteTimeout: o.WriteTimeout,
+ PoolSize: o.PoolSize,
+ PoolTimeout: o.PoolTimeout,
+ IdleTimeout: o.IdleTimeout,
+ IdleCheckFrequency: o.IdleCheckFrequency,
+ TLSConfig: o.TLSConfig,
+ }
+}
+
+func (o *UniversalOptions) simple() *Options {
+ addr := "127.0.0.1:6379"
+ if len(o.Addrs) > 0 {
+ addr = o.Addrs[0]
+ }
+
+ return &Options{
+ Addr: addr,
+ DB: o.DB,
+
+ OnConnect: o.OnConnect,
+ MaxRetries: o.MaxRetries,
+ Password: o.Password,
+ DialTimeout: o.DialTimeout,
+ ReadTimeout: o.ReadTimeout,
+ WriteTimeout: o.WriteTimeout,
+ PoolSize: o.PoolSize,
+ PoolTimeout: o.PoolTimeout,
+ IdleTimeout: o.IdleTimeout,
+ IdleCheckFrequency: o.IdleCheckFrequency,
+ TLSConfig: o.TLSConfig,
+ }
+}
+
+// --------------------------------------------------------------------
+
+// UniversalClient is an abstract client which - based on the provided options -
+// can connect to either clusters, or sentinel-backed failover instances or simple
+// single-instance servers. This can be useful for testing cluster-specific
+// applications locally.
+type UniversalClient interface {
+ Cmdable
+ Watch(fn func(*Tx) error, keys ...string) error
+ Process(cmd Cmder) error
+ WrapProcess(fn func(oldProcess func(cmd Cmder) error) func(cmd Cmder) error)
+ Subscribe(channels ...string) *PubSub
+ PSubscribe(channels ...string) *PubSub
+ Close() error
+}
+
+var _ UniversalClient = (*Client)(nil)
+var _ UniversalClient = (*ClusterClient)(nil)
+
+// NewUniversalClient returns a new multi client. The type of client returned depends
+// on the following three conditions:
+//
+// 1. if a MasterName is passed a sentinel-backed FailoverClient will be returned
+// 2. if the number of Addrs is two or more, a ClusterClient will be returned
+// 3. otherwise, a single-node redis Client will be returned.
+func NewUniversalClient(opts *UniversalOptions) UniversalClient {
+ if opts.MasterName != "" {
+ return NewFailoverClient(opts.failover())
+ } else if len(opts.Addrs) > 1 {
+ return NewClusterClient(opts.cluster())
+ }
+ return NewClient(opts.simple())
+}