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