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/*
* Copyright 1999-2004 The Apache Software Foundation
*
* 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.
*/
/***************************************************************************
* Description: load balance worker header file *
* Author: Gal Shachor <shachor@il.ibm.com> *
* Author: Rainer Jung <rjung@apache.org> *
* Version: $Revision: 408167 $ *
***************************************************************************/
#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_DEF_DOMAIN_NAME ("unknown")
#define JK_LB_BYREQUESTS (0)
#define JK_LB_BYTRAFFIC (1)
#define JK_LB_BYBUSYNESS (2)
#define JK_LB_METHOD_REQUESTS ("Request")
#define JK_LB_METHOD_TRAFFIC ("Traffic")
#define JK_LB_METHOD_BUSYNESS ("Busyness")
#define JK_LB_LOCK_DEFAULT (0)
#define JK_LB_LOCK_PESSIMISTIC (1)
#define JK_LB_LM_DEFAULT ("Optimistic")
#define JK_LB_LM_PESSIMISTIC ("Pessimistic")
/* 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)
static const char *lb_locking_type[] = {
JK_LB_LM_DEFAULT,
JK_LB_LM_PESSIMISTIC,
"unknown",
NULL
};
static const char *lb_method_type[] = {
JK_LB_METHOD_REQUESTS,
JK_LB_METHOD_TRAFFIC,
JK_LB_METHOD_BUSYNESS,
"unknown",
NULL
};
struct worker_record
{
jk_worker_t *w;
/* Shared memory worker data */
jk_shm_worker_t *s;
/* Current jvmRoute. Can be name or domain */
const char *r;
};
typedef struct worker_record worker_record_t;
struct lb_worker
{
worker_record_t *lb_workers;
unsigned int num_of_workers;
int lbmethod;
int lblock;
time_t maintain_time;
jk_pool_t p;
jk_pool_atom_t buf[TINY_POOL_SIZE];
jk_worker_t worker;
JK_CRIT_SEC cs;
/* Shared memory worker data */
jk_shm_worker_t *s;
};
typedef struct lb_worker lb_worker_t;
int JK_METHOD lb_worker_factory(jk_worker_t **w,
const char *name, jk_logger_t *l);
void reset_lb_values(lb_worker_t *p, jk_logger_t *l);
void update_mult(lb_worker_t * p, jk_logger_t *l);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* JK_LB_WORKER_H */
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