X-Git-Url: http://jsfdemo.indexdata.com/?a=blobdiff_plain;f=src%2Fconnection.c;h=012d99492cf54fa74017975918339ddf41acb5fb;hb=6c93cf7588a8b1efab211236bfedf55a591ac635;hp=da7c1a5cdbb9df047cd647cc978b156c76b9abdb;hpb=566c07f3d9a4b541493a47d1e28bac4fc146ec6c;p=pazpar2-moved-to-github.git diff --git a/src/connection.c b/src/connection.c index da7c1a5..012d994 100644 --- a/src/connection.c +++ b/src/connection.c @@ -1,5 +1,5 @@ /* This file is part of Pazpar2. - Copyright (C) 2006-2010 Index Data + Copyright (C) 2006-2011 Index Data Pazpar2 is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free @@ -78,7 +78,8 @@ struct connection { enum { Conn_Resolving, Conn_Connecting, - Conn_Open + Conn_Open, + Conn_Dead } state; int operation_timeout; int session_timeout; @@ -122,6 +123,7 @@ static void remove_connection_from_host(struct connection *con) } conp = &(*conp)->next; } + yaz_cond_broadcast(con->host->cond_ready); } // Close connection and recycle structure @@ -132,14 +134,13 @@ static void connection_destroy(struct connection *co) ZOOM_connection_destroy(co->link); iochan_destroy(co->iochan); } - yaz_log(YLOG_DEBUG, "Connection destroy %s", co->host->hostport); + yaz_log(YLOG_DEBUG, "%p Connection destroy %s", co, co->host->hostport); if (co->client) { client_disconnect(co->client); } - remove_connection_from_host(co); xfree(co->zproxy); xfree(co); connection_use(-1); @@ -193,23 +194,28 @@ static void non_block_events(struct connection *co) continue; ev = ZOOM_connection_last_event(link); -#if 0 - yaz_log(YLOG_LOG, "ZOOM_EVENT_%s", ZOOM_get_event_str(ev)); +#if 1 + yaz_log(YLOG_DEBUG, "%p Connection ZOOM_EVENT_%s", co, ZOOM_get_event_str(ev)); #endif switch (ev) { case ZOOM_EVENT_END: { const char *error, *addinfo; - int err; + int err; if ((err = ZOOM_connection_error(link, &error, &addinfo))) { yaz_log(YLOG_LOG, "Error %s from %s", error, client_get_url(cl)); + client_set_diagnostic(cl, err); + client_set_state(cl, Client_Error); + } + else + { + iochan_settimeout(iochan, co->session_timeout); + client_set_state(cl, Client_Idle); } - iochan_settimeout(iochan, co->session_timeout); - client_set_diagnostic(cl, err); - client_set_state(cl, Client_Idle); + yaz_cond_broadcast(co->host->cond_ready); } break; case ZOOM_EVENT_SEND_DATA: @@ -245,6 +251,7 @@ static void non_block_events(struct connection *co) struct client *cl = co->client; if (cl) { + client_check_preferred_watch(cl); client_got_records(cl); } } @@ -273,28 +280,28 @@ static void connection_handler(IOCHAN iochan, int event) a closed connection from the target.. Or, perhaps, an unexpected package.. We will just close the connection */ yaz_log(YLOG_LOG, "timeout connection %p event=%d", co, event); - connection_destroy(co); + remove_connection_from_host(co); yaz_mutex_leave(host->mutex); + connection_destroy(co); } else if (event & EVENT_TIMEOUT) { if (co->state == Conn_Connecting) { - yaz_log(YLOG_WARN, "connect timeout %s", client_get_url(cl)); + yaz_log(YLOG_WARN, "%p connect timeout %s", co, client_get_url(cl)); client_set_state(cl, Client_Error); - connection_destroy(co); - } - else if (client_get_state(co->client) == Client_Idle) - { - yaz_log(YLOG_LOG, "idle timeout %s", client_get_url(cl)); + remove_connection_from_host(co); + yaz_mutex_leave(host->mutex); connection_destroy(co); } else { - yaz_log(YLOG_LOG, "ignore timeout %s", client_get_url(cl)); + yaz_log(YLOG_LOG, "%p Connection idle timeout %s", co, client_get_url(cl)); + remove_connection_from_host(co); + yaz_mutex_leave(host->mutex); + connection_destroy(co); } - yaz_mutex_leave(host->mutex); } else { @@ -341,6 +348,7 @@ start: { if (!host->ipport) /* unresolved */ { + remove_connection_from_host(con); yaz_mutex_leave(host->mutex); connection_destroy(con); goto start; @@ -348,6 +356,7 @@ start: } else if (!con->client) { + remove_connection_from_host(con); yaz_mutex_leave(host->mutex); connection_destroy(con); /* start all over .. at some point it will be NULL */ @@ -414,7 +423,6 @@ static int connection_connect(struct connection *con, iochan_man_t iochan_man) if ((sru_version = session_setting_oneval(sdb, PZ_SRU_VERSION)) && *sru_version) ZOOM_options_set(zoptions, "sru_version", sru_version); - if (!(link = ZOOM_connection_create(zoptions))) { yaz_log(YLOG_FATAL|YLOG_ERRNO, "Failed to create ZOOM Connection"); @@ -429,11 +437,13 @@ static int connection_connect(struct connection *con, iochan_man_t iochan_man) strcat(http_hostport, host->hostport); ZOOM_connection_connect(link, http_hostport, 0); } + else if (zproxy && *zproxy) + ZOOM_connection_connect(link, host->hostport, 0); else ZOOM_connection_connect(link, host->ipport, 0); con->link = link; - con->iochan = iochan_create(0, connection_handler, 0, "connection_socket"); + con->iochan = iochan_create(-1, connection_handler, 0, "connection_socket"); con->state = Conn_Connecting; iochan_settimeout(con->iochan, con->operation_timeout); iochan_setdata(con->iochan, con); @@ -448,7 +458,8 @@ static int connection_connect(struct connection *con, iochan_man_t iochan_man) // Ensure that client has a connection associated int client_prep_connection(struct client *cl, int operation_timeout, int session_timeout, - iochan_man_t iochan_man) + iochan_man_t iochan_man, + const struct timeval *abstime) { struct connection *co; struct host *host = client_get_host(cl); @@ -467,23 +478,66 @@ int client_prep_connection(struct client *cl, if (!co) { + int max_connections = 0; + int reuse_connections = 1; + const char *v = session_setting_oneval(client_get_database(cl), + PZ_MAX_CONNECTIONS); + if (v && *v) + max_connections = atoi(v); + + v = session_setting_oneval(client_get_database(cl), + PZ_REUSE_CONNECTIONS); + if (v && *v) + reuse_connections = atoi(v); + // See if someone else has an idle connection // We should look at timestamps here to select the longest-idle connection yaz_mutex_enter(host->mutex); - for (co = host->connections; co; co = co->next) - if (connection_is_idle(co) && - (!co->client || client_get_state(co->client) == Client_Idle) && - !strcmp(ZOOM_connection_option_get(co->link, "user"), - session_setting_oneval(client_get_database(cl), - PZ_AUTHENTICATION))) - { - if (zproxy == 0 && co->zproxy == 0) - break; - if (zproxy && co->zproxy && !strcmp(zproxy, co->zproxy)) + while (1) + { + int num_connections = 0; + for (co = host->connections; co; co = co->next) + num_connections++; + if (reuse_connections) { + for (co = host->connections; co; co = co->next) + { + if (connection_is_idle(co) && + (!co->client || client_get_state(co->client) == Client_Idle) && + !strcmp(ZOOM_connection_option_get(co->link, "user"), + session_setting_oneval(client_get_database(cl), + PZ_AUTHENTICATION))) + { + if (zproxy == 0 && co->zproxy == 0) + break; + if (zproxy && co->zproxy && !strcmp(zproxy, co->zproxy)) + break; + } + } + if (co) + { + yaz_log(YLOG_LOG, "num_connections = %d (reusing)", num_connections); break; + } } + if (max_connections <= 0 || num_connections < max_connections) + { + yaz_log(YLOG_LOG, "num_connections = %d (new); max = %d", + num_connections, max_connections); + break; + } + yaz_log(YLOG_LOG, "num_connections = %d (waiting) max = %d", + num_connections, max_connections); + if (yaz_cond_wait(host->cond_ready, host->mutex, abstime)) + { + yaz_log(YLOG_LOG, "out of connections %s", client_get_url(cl)); + client_set_state(cl, Client_Error); + yaz_mutex_leave(host->mutex); + return 0; + } + } if (co) { + yaz_log(YLOG_LOG, "%p Connection reuse. state: %d", co, co->state); connection_release(co); client_set_connection(cl, co); co->client = cl;