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authorhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 02:41:33 -0500
committerhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 02:43:36 -0500
commit9401f816dd0d9d550fe98a8507224bde51c4b847 (patch)
tree94f2d7a7893a787bafdca8b5ef063ea316938874 /rubbos/app/tomcat-connectors-1.2.32-src/native/common/jk_lb_worker.h
parente8ec7aa8e38a93f5b034ac74cebce5de23710317 (diff)
upload tomcat
JIRA: BOTTLENECK-7 Change-Id: I875d474869efd76ca203c30b60ebc0c3ee606d0e Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+/***************************************************************************
+ * Description: load balance worker header file *
+ * Author: Gal Shachor <shachor@il.ibm.com> *
+ * Author: Rainer Jung <rjung@apache.org> *
+ * Version: $Revision: 751916 $ *
+ ***************************************************************************/
+
+#ifndef JK_LB_WORKER_H
+#define JK_LB_WORKER_H
+
+#include "jk_logger.h"
+#include "jk_service.h"
+#include "jk_mt.h"
+#include "jk_shm.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+#define JK_LB_WORKER_NAME ("lb")
+#define JK_LB_WORKER_TYPE (5)
+#define JK_LB_SUB_WORKER_TYPE (7)
+#define JK_LB_DEF_DOMAIN_NAME ("unknown")
+
+#define JK_LB_METHOD_REQUESTS (0)
+#define JK_LB_METHOD_TRAFFIC (1)
+#define JK_LB_METHOD_BUSYNESS (2)
+#define JK_LB_METHOD_SESSIONS (3)
+#define JK_LB_METHOD_DEF (JK_LB_METHOD_REQUESTS)
+#define JK_LB_METHOD_MAX (JK_LB_METHOD_SESSIONS)
+#define JK_LB_METHOD_TEXT_REQUESTS ("Request")
+#define JK_LB_METHOD_TEXT_TRAFFIC ("Traffic")
+#define JK_LB_METHOD_TEXT_BUSYNESS ("Busyness")
+#define JK_LB_METHOD_TEXT_SESSIONS ("Sessions")
+#define JK_LB_METHOD_TEXT_DEF (JK_LB_METHOD_TEXT_REQUESTS)
+#define JK_LB_LOCK_OPTIMISTIC (0)
+#define JK_LB_LOCK_PESSIMISTIC (1)
+#define JK_LB_LOCK_DEF (JK_LB_LOCK_OPTIMISTIC)
+#define JK_LB_LOCK_MAX (JK_LB_LOCK_PESSIMISTIC)
+#define JK_LB_LOCK_TEXT_OPTIMISTIC ("Optimistic")
+#define JK_LB_LOCK_TEXT_PESSIMISTIC ("Pessimistic")
+#define JK_LB_LOCK_TEXT_DEF (JK_LB_LOCK_TEXT_OPTIMISTIC)
+/*
+ * The following definitions for state and activation
+ * need to be kept in sync with the two macros
+ * JK_WORKER_USABLE() and JK_WORKER_USABLE_STICKY() in jk_lb_worker.c.
+ * Since we use ordered comparisons there instead of multiple
+ * equal/unequal compares, order of the values is critical here.
+ */
+#define JK_LB_STATE_IDLE (0)
+#define JK_LB_STATE_OK (1)
+#define JK_LB_STATE_RECOVER (2)
+#define JK_LB_STATE_FORCE (3)
+#define JK_LB_STATE_BUSY (4)
+#define JK_LB_STATE_ERROR (5)
+#define JK_LB_STATE_PROBE (6)
+#define JK_LB_STATE_DEF (JK_LB_STATE_IDLE)
+#define JK_LB_STATE_TEXT_IDLE ("OK/IDLE")
+#define JK_LB_STATE_TEXT_OK ("OK")
+#define JK_LB_STATE_TEXT_RECOVER ("ERR/REC")
+#define JK_LB_STATE_TEXT_FORCE ("ERR/FRC")
+#define JK_LB_STATE_TEXT_BUSY ("OK/BUSY")
+#define JK_LB_STATE_TEXT_ERROR ("ERR")
+#define JK_LB_STATE_TEXT_PROBE ("ERR/PRB")
+#define JK_LB_STATE_TEXT_MAX (JK_LB_STATE_PROBE)
+#define JK_LB_STATE_TEXT_DEF (JK_LB_STATE_TEXT_IDLE)
+/* All JK_LB_ACTIVATION_* values must be single digit. */
+/* Otherwise the string encoding of the activation array */
+/* fails e.g. in the isapi redirector. */
+/* JK_LB_ACTIVATION_UNSET is not allowed as an actual worker state. */
+/* It will not work e.g. when the status worker tries to show the state. */
+/* It is only used in rule extension data to indicate, that the */
+/* activation state should not be overwritten. */
+#define JK_LB_ACTIVATION_ACTIVE (0)
+#define JK_LB_ACTIVATION_DISABLED (1)
+#define JK_LB_ACTIVATION_STOPPED (2)
+#define JK_LB_ACTIVATION_UNSET (9)
+#define JK_LB_ACTIVATION_DEF (JK_LB_ACTIVATION_ACTIVE)
+#define JK_LB_ACTIVATION_MAX (JK_LB_ACTIVATION_STOPPED)
+#define JK_LB_ACTIVATION_TEXT_ACTIVE ("ACT")
+#define JK_LB_ACTIVATION_TEXT_DISABLED ("DIS")
+#define JK_LB_ACTIVATION_TEXT_STOPPED ("STP")
+#define JK_LB_ACTIVATION_TEXT_DEF (JK_LB_ACTIVATION_TEXT_ACTIVE)
+
+#define JK_LB_UINT64_STR_SZ (21)
+#define JK_LB_NOTES_COUNT (9)
+#define JK_NOTE_LB_FIRST_NAME ("JK_LB_FIRST_NAME")
+#define JK_NOTE_LB_FIRST_VALUE ("JK_LB_FIRST_VALUE")
+#define JK_NOTE_LB_FIRST_ACCESSED ("JK_LB_FIRST_ACCESSED")
+#define JK_NOTE_LB_FIRST_READ ("JK_LB_FIRST_READ")
+#define JK_NOTE_LB_FIRST_TRANSFERRED ("JK_LB_FIRST_TRANSFERRED")
+#define JK_NOTE_LB_FIRST_ERRORS ("JK_LB_FIRST_ERRORS")
+#define JK_NOTE_LB_FIRST_BUSY ("JK_LB_FIRST_BUSY")
+#define JK_NOTE_LB_FIRST_ACTIVATION ("JK_LB_FIRST_ACTIVATION")
+#define JK_NOTE_LB_FIRST_STATE ("JK_LB_FIRST_STATE")
+#define JK_NOTE_LB_LAST_NAME ("JK_LB_LAST_NAME")
+#define JK_NOTE_LB_LAST_VALUE ("JK_LB_LAST_VALUE")
+#define JK_NOTE_LB_LAST_ACCESSED ("JK_LB_LAST_ACCESSED")
+#define JK_NOTE_LB_LAST_READ ("JK_LB_LAST_READ")
+#define JK_NOTE_LB_LAST_TRANSFERRED ("JK_LB_LAST_TRANSFERRED")
+#define JK_NOTE_LB_LAST_ERRORS ("JK_LB_LAST_ERRORS")
+#define JK_NOTE_LB_LAST_BUSY ("JK_LB_LAST_BUSY")
+#define JK_NOTE_LB_LAST_ACTIVATION ("JK_LB_LAST_ACTIVATION")
+#define JK_NOTE_LB_LAST_STATE ("JK_LB_LAST_STATE")
+
+/* Time to wait before retry. */
+#define WAIT_BEFORE_RECOVER (60)
+/* We accept doing global maintenance if we are */
+/* JK_LB_MAINTAIN_TOLERANCE seconds early. */
+#define JK_LB_MAINTAIN_TOLERANCE (2)
+/* We divide load values by 2^x during global maintenance. */
+/* The exponent x is JK_LB_DECAY_MULT*#MAINT_INTV_SINCE_LAST_MAINT */
+#define JK_LB_DECAY_MULT (1)
+
+struct lb_sub_worker
+{
+ jk_worker_t *worker;
+ /* Shared memory worker data */
+ jk_shm_lb_sub_worker_t *s;
+
+ char name[JK_SHM_STR_SIZ+1];
+ /* Sequence counter starting at 0 and increasing
+ * every time we change the config
+ */
+ volatile unsigned int sequence;
+
+ /* route */
+ char route[JK_SHM_STR_SIZ+1];
+ /* worker domain */
+ char domain[JK_SHM_STR_SIZ+1];
+ /* worker redirect route */
+ char redirect[JK_SHM_STR_SIZ+1];
+ /* worker distance */
+ int distance;
+ /* current activation state (config) of the worker */
+ int activation;
+ /* Current lb factor */
+ int lb_factor;
+ /* Current worker index */
+ int i;
+ /* Current lb reciprocal factor */
+ jk_uint64_t lb_mult;
+};
+typedef struct lb_sub_worker lb_sub_worker_t;
+
+struct lb_worker
+{
+ jk_worker_t worker;
+ /* Shared memory worker data */
+ jk_shm_lb_worker_t *s;
+
+ char name[JK_SHM_STR_SIZ+1];
+ /* Sequence counter starting at 0 and increasing
+ * every time we change the config
+ */
+ volatile unsigned int sequence;
+
+ jk_pool_t p;
+ jk_pool_atom_t buf[TINY_POOL_SIZE];
+
+ JK_CRIT_SEC cs;
+
+ lb_sub_worker_t *lb_workers;
+ unsigned int num_of_workers;
+ int sticky_session;
+ int sticky_session_force;
+ int recover_wait_time;
+ int error_escalation_time;
+ int max_reply_timeouts;
+ int retries;
+ int retry_interval;
+ int lbmethod;
+ int lblock;
+ int maintain_time;
+ unsigned int max_packet_size;
+ unsigned int next_offset;
+ /* Session cookie */
+ char session_cookie[JK_SHM_STR_SIZ+1];
+ /* Session path */
+ char session_path[JK_SHM_STR_SIZ+1];
+};
+typedef struct lb_worker lb_worker_t;
+
+int JK_METHOD lb_worker_factory(jk_worker_t **w,
+ const char *name, jk_logger_t *l);
+
+const char *jk_lb_get_lock(lb_worker_t *p, jk_logger_t *l);
+int jk_lb_get_lock_code(const char *v);
+const char *jk_lb_get_method(lb_worker_t *p, jk_logger_t *l);
+int jk_lb_get_method_code(const char *v);
+const char *jk_lb_get_state(lb_sub_worker_t *p, jk_logger_t *l);
+int jk_lb_get_state_code(const char *v);
+const char *jk_lb_get_activation_direct(int activation, jk_logger_t *l);
+const char *jk_lb_get_activation(lb_sub_worker_t *p, jk_logger_t *l);
+int jk_lb_get_activation_code(const char *v);
+void reset_lb_values(lb_worker_t *p, jk_logger_t *l);
+void jk_lb_pull(lb_worker_t * p, int locked, jk_logger_t *l);
+void jk_lb_push(lb_worker_t * p, int locked, jk_logger_t *l);
+void update_mult(lb_worker_t * p, jk_logger_t *l);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* JK_LB_WORKER_H */