mirror of https://github.com/yandex/odyssey.git
118 lines
2.6 KiB
C
118 lines
2.6 KiB
C
|
|
/*
|
|
* odissey.
|
|
*
|
|
* PostgreSQL connection pooler and request router.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <stdarg.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include <machinarium.h>
|
|
#include <soprano.h>
|
|
|
|
#include "od_macro.h"
|
|
#include "od_list.h"
|
|
#include "od_pid.h"
|
|
#include "od_syslog.h"
|
|
#include "od_log.h"
|
|
#include "od_scheme.h"
|
|
#include "od_lex.h"
|
|
#include "od_config.h"
|
|
#include "od_stat.h"
|
|
#include "od_server.h"
|
|
#include "od_server_pool.h"
|
|
#include "od_client.h"
|
|
#include "od_client_list.h"
|
|
#include "od_client_pool.h"
|
|
#include "od_route_id.h"
|
|
#include "od_route.h"
|
|
#include "od_route_pool.h"
|
|
#include "od.h"
|
|
#include "od_io.h"
|
|
#include "od_pooler.h"
|
|
#include "od_periodic.h"
|
|
#include "od_fe.h"
|
|
#include "od_be.h"
|
|
|
|
static inline int
|
|
od_expire_mark(od_server_t *server, void *arg)
|
|
{
|
|
od_route_t *route = server->route;
|
|
if (! mm_is_connected(server->io)) {
|
|
od_serverpool_set(&route->server_pool, server,
|
|
OD_SCLOSE);
|
|
return 0;
|
|
}
|
|
if (! route->scheme->ttl)
|
|
return 0;
|
|
|
|
od_pooler_t *pooler = arg;
|
|
od_debug(&pooler->od->log, server->io, "S: idle time: %d",
|
|
server->idle_time);
|
|
if (server->idle_time < route->scheme->ttl) {
|
|
server->idle_time++;
|
|
return 0;
|
|
}
|
|
od_serverpool_set(&route->server_pool, server,
|
|
OD_SEXPIRE);
|
|
return 0;
|
|
}
|
|
|
|
void od_periodic(void *arg)
|
|
{
|
|
od_pooler_t *pooler = arg;
|
|
|
|
for (;;)
|
|
{
|
|
/* idle servers expire.
|
|
*
|
|
* 1. Add plus one idle second on each traversal.
|
|
* If a server idle time is equal to ttl, then move
|
|
* it to the EXPIRE queue.
|
|
*
|
|
* It is important that this function must not yield.
|
|
*
|
|
* 2. Foreach servers in EXPIRE queue, send Terminate
|
|
* and close the connection.
|
|
*/
|
|
|
|
/* mark servers for gc */
|
|
od_routepool_foreach(&pooler->route_pool, OD_SIDLE,
|
|
od_expire_mark,
|
|
pooler);
|
|
|
|
/* sweep disconnected servers */
|
|
for (;;) {
|
|
od_server_t *server =
|
|
od_routepool_next(&pooler->route_pool, OD_SCLOSE);
|
|
if (server == NULL)
|
|
break;
|
|
od_log(&pooler->od->log, server->io, "S: disconnected",
|
|
server->idle_time);
|
|
server->idle_time = 0;
|
|
od_beclose(server);
|
|
}
|
|
|
|
/* sweep expired connections */
|
|
for (;;) {
|
|
od_server_t *server =
|
|
od_routepool_next(&pooler->route_pool, OD_SEXPIRE);
|
|
if (server == NULL)
|
|
break;
|
|
od_debug(&pooler->od->log, server->io,
|
|
"S: closing idle connection (%d secs)",
|
|
server->idle_time);
|
|
server->idle_time = 0;
|
|
od_beterminate(server);
|
|
od_beclose(server);
|
|
}
|
|
|
|
/* 1 second soft interval */
|
|
mm_sleep(pooler->env, 1000);
|
|
}
|
|
}
|