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/*
* Copyright 2015 Open Networking Laboratory
*
* 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 org.onosproject.bgp.controller.impl;
import static org.onlab.util.Tools.groupedThreads;
import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;
import java.net.InetSocketAddress;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.Executors;
import org.jboss.netty.bootstrap.ClientBootstrap;
import org.jboss.netty.bootstrap.ServerBootstrap;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelPipelineFactory;
import org.jboss.netty.channel.group.ChannelGroup;
import org.jboss.netty.channel.group.DefaultChannelGroup;
import org.jboss.netty.channel.socket.nio.NioClientSocketChannelFactory;
import org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory;
import org.onosproject.bgp.controller.BgpController;
import org.onosproject.bgpio.protocol.BgpFactories;
import org.onosproject.bgpio.protocol.BgpFactory;
import org.onosproject.bgpio.protocol.BgpVersion;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* The main controller class. Handles all setup and network listeners - Distributed ownership control of bgp peer
* through IControllerRegistryService
*/
public class Controller {
private static final Logger log = LoggerFactory.getLogger(Controller.class);
private static final BgpFactory FACTORY4 = BgpFactories.getFactory(BgpVersion.BGP_4);
private ChannelGroup cg;
public Channel serverChannel;
// Configuration options
private static final short BGP_PORT_NUM = 179;
private static final short PORT_NUM_ZERO = 0;
private static boolean isPortNumSet = false;
private final int workerThreads = 16;
private final int peerWorkerThreads = 16;
// Start time of the controller
private long systemStartTime;
private NioServerSocketChannelFactory serverExecFactory;
private NioClientSocketChannelFactory peerExecFactory;
private static ClientBootstrap peerBootstrap;
private BgpController bgpController;
// Perf. related configuration
private static final int SEND_BUFFER_SIZE = 4 * 1024 * 1024;
/**
* Constructor to initialize the values.
*
* @param bgpController bgp controller instance
*/
public Controller(BgpController bgpController) {
this.bgpController = bgpController;
}
/**
* Returns factory version for processing BGP messages.
*
* @return instance of factory version
*/
static BgpFactory getBgpMessageFactory4() {
return FACTORY4;
}
/**
* To get system start time.
*
* @return system start time in milliseconds
*/
public long getSystemStartTime() {
return (this.systemStartTime);
}
/**
* Tell controller that we're ready to accept bgp peer connections.
*/
public void run() {
try {
peerBootstrap = createPeerBootStrap();
peerBootstrap.setOption("reuseAddr", true);
peerBootstrap.setOption("child.keepAlive", true);
peerBootstrap.setOption("child.tcpNoDelay", true);
peerBootstrap.setOption("child.sendBufferSize", Controller.SEND_BUFFER_SIZE);
final ServerBootstrap bootstrap = createServerBootStrap();
bootstrap.setOption("reuseAddr", true);
bootstrap.setOption("child.keepAlive", true);
bootstrap.setOption("child.tcpNoDelay", true);
bootstrap.setOption("child.sendBufferSize", Controller.SEND_BUFFER_SIZE);
ChannelPipelineFactory pfact = new BgpPipelineFactory(bgpController, true);
bootstrap.setPipelineFactory(pfact);
InetSocketAddress sa = new InetSocketAddress(getBgpPortNum());
cg = new DefaultChannelGroup();
serverChannel = bootstrap.bind(sa);
cg.add(serverChannel);
log.info("Listening for Peer connection on {}", sa);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* Creates server boot strap.
*
* @return ServerBootStrap
*/
private ServerBootstrap createServerBootStrap() {
if (workerThreads == 0) {
serverExecFactory = new NioServerSocketChannelFactory(
Executors.newCachedThreadPool(groupedThreads("onos/bgp", "boss-%d")),
Executors.newCachedThreadPool(groupedThreads("onos/bgp", "worker-%d")));
return new ServerBootstrap(serverExecFactory);
} else {
serverExecFactory = new NioServerSocketChannelFactory(
Executors.newCachedThreadPool(groupedThreads("onos/bgp", "boss-%d")),
Executors.newCachedThreadPool(groupedThreads("onos/bgp", "worker-%d")),
workerThreads);
return new ServerBootstrap(serverExecFactory);
}
}
/**
* Creates peer boot strap.
*
* @return ClientBootstrap
*/
private ClientBootstrap createPeerBootStrap() {
if (peerWorkerThreads == 0) {
peerExecFactory = new NioClientSocketChannelFactory(
Executors.newCachedThreadPool(groupedThreads("onos/bgp", "boss-%d")),
Executors.newCachedThreadPool(groupedThreads("onos/bgp", "worker-%d")));
return new ClientBootstrap(peerExecFactory);
} else {
peerExecFactory = new NioClientSocketChannelFactory(
Executors.newCachedThreadPool(groupedThreads("onos/bgp", "boss-%d")),
Executors.newCachedThreadPool(groupedThreads("onos/bgp", "worker-%d")),
peerWorkerThreads);
return new ClientBootstrap(peerExecFactory);
}
}
/**
* Gets peer bootstrap.
*
* @return peer bootstrap
*/
public static ClientBootstrap peerBootstrap() {
return peerBootstrap;
}
/**
* Initialize internal data structures.
*/
public void init() {
// These data structures are initialized here because other
// module's startUp() might be called before ours
this.systemStartTime = System.currentTimeMillis();
}
/**
* Gets run time memory.
*
* @return m run time memory
*/
public Map<String, Long> getMemory() {
Map<String, Long> m = new HashMap<>();
Runtime runtime = Runtime.getRuntime();
m.put("total", runtime.totalMemory());
m.put("free", runtime.freeMemory());
return m;
}
/**
* Gets UP time.
*
* @return UP time
*/
public Long getUptime() {
RuntimeMXBean rb = ManagementFactory.getRuntimeMXBean();
return rb.getUptime();
}
/**
* Starts the BGP controller.
*/
public void start() {
log.info("Started");
this.init();
this.run();
}
/**
* Stops the BGP controller.
*/
public void stop() {
log.info("Stopped");
serverExecFactory.shutdown();
peerExecFactory.shutdown();
cg.close();
}
/**
* Returns port number.
*
* @return port number
*/
public static short getBgpPortNum() {
if (isPortNumSet) {
return PORT_NUM_ZERO;
}
return BGP_PORT_NUM;
}
/**
* sets the isPortNumSet as true.
*/
public void setBgpPortNum() {
isPortNumSet = true;
}
}
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