/* This file is part of Pazpar2.
- Copyright (C) 2006-2013 Index Data
+ Copyright (C) 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
#include <yaz/tcpip.h>
#include "connection.h"
#include "session.h"
-#include "host.h"
#include "client.h"
#include "settings.h"
struct connection {
IOCHAN iochan;
ZOOM_connection link;
- struct host *host;
struct client *client;
char *zproxy;
char *url;
static int connection_connect(struct connection *con, iochan_man_t iochan_man);
-static int connection_is_idle(struct connection *co)
-{
- ZOOM_connection link = co->link;
- int event;
-
- if (co->state != Conn_Open || !link)
- return 0;
-
- if (!ZOOM_connection_is_idle(link))
- return 0;
- event = ZOOM_connection_peek_event(link);
- if (event == ZOOM_EVENT_NONE)
- return 1;
- else
- return 0;
-}
-
ZOOM_connection connection_get_link(struct connection *co)
{
return co->link;
}
-static void remove_connection_from_host(struct connection *con)
-{
- struct connection **conp = &con->host->connections;
- assert(con);
- while (*conp)
- {
- if (*conp == con)
- {
- *conp = (*conp)->next;
- break;
- }
- conp = &(*conp)->next;
- }
- yaz_cond_broadcast(con->host->cond_ready);
+void connection_mark_dead(struct connection *co)
+{
+ iochan_settimeout(co->iochan, 1);
}
// Close connection and recycle structure
// client's database
static struct connection *connection_create(struct client *cl,
const char *url,
- struct host *host,
+ const char *zproxy,
int operation_timeout,
int session_timeout,
iochan_man_t iochan_man)
{
struct connection *co;
+ int ret;
co = xmalloc(sizeof(*co));
- co->host = host;
co->client = cl;
co->url = xstrdup(url);
co->zproxy = 0;
+ if (zproxy)
+ co->zproxy = xstrdup(zproxy);
+
client_set_connection(cl, co);
co->link = 0;
co->state = Conn_Closed;
co->operation_timeout = operation_timeout;
co->session_timeout = session_timeout;
- if (host->ipport)
- connection_connect(co, iochan_man);
-
- yaz_mutex_enter(host->mutex);
- co->next = co->host->connections;
- co->host->connections = co;
- yaz_mutex_leave(host->mutex);
-
+ ret = connection_connect(co, iochan_man);
connection_use(1);
+ if (ret)
+ { /* error */
+ connection_destroy(co);
+ co = 0;
+ }
return co;
}
int err;
if ((err = ZOOM_connection_error(link, &error, &addinfo)))
{
- yaz_log(YLOG_LOG, "Error %s from %s",
- error, client_get_id(cl));
+ struct session *se = client_get_session(cl);
+
+ session_log(se, YLOG_WARN, "%s: Error %s (%s)",
+ client_get_id(cl), error, addinfo);
client_set_diagnostic(cl, err, error, addinfo);
client_set_state(cl, Client_Error);
}
iochan_settimeout(iochan, co->session_timeout);
client_set_state(cl, Client_Idle);
}
- yaz_cond_broadcast(co->host->cond_ready);
}
break;
case ZOOM_EVENT_SEND_DATA:
case ZOOM_EVENT_RECV_APDU:
break;
case ZOOM_EVENT_CONNECT:
- yaz_log(YLOG_LOG, "Connected to %s", client_get_id(cl));
co->state = Conn_Open;
break;
case ZOOM_EVENT_RECV_SEARCH:
case ZOOM_EVENT_RECV_RECORD:
client_record_response(cl, &got_records);
break;
+ case ZOOM_EVENT_NONE:
+ break;
default:
yaz_log(YLOG_LOG, "Unhandled event (%d) from %s",
ev, client_get_id(cl));
{
struct client *cl = co->client;
if (cl)
- {
- client_check_preferred_watch(cl);
client_got_records(cl);
- }
+ }
+}
+
+static void iochan_update(struct connection *co)
+{
+ if (co->link)
+ {
+ int m = ZOOM_connection_get_mask(co->link);
+
+ if (m == 0)
+ m = ZOOM_SELECT_READ;
+ iochan_setflags(co->iochan, m);
+ iochan_setfd(co->iochan, ZOOM_connection_get_socket(co->link));
}
}
{
int r = ZOOM_connection_exec_task(co->link);
if (!r)
- non_block_events(co);
- else
{
- iochan_setflags(co->iochan, ZOOM_connection_get_mask(co->link));
- iochan_setfd(co->iochan, ZOOM_connection_get_socket(co->link));
+ struct client *cl = co->client;
+
+ client_lock(cl);
+ non_block_events(co);
+ client_unlock(cl);
}
+ else
+ iochan_update(co);
}
static void connection_handler(IOCHAN iochan, int event)
{
struct connection *co = iochan_getdata(iochan);
struct client *cl;
- struct host *host = co->host;
- yaz_mutex_enter(host->mutex);
cl = co->client;
if (!cl)
{
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);
- remove_connection_from_host(co);
- yaz_mutex_leave(host->mutex);
connection_destroy(co);
}
else if (event & EVENT_TIMEOUT)
non_block_events(co);
client_unlock(cl);
- remove_connection_from_host(co);
- yaz_mutex_leave(host->mutex);
connection_destroy(co);
}
else
{
- yaz_mutex_leave(host->mutex);
-
+ if (ZOOM_connection_is_idle(co->link))
+ {
+ connection_destroy(co);
+ return;
+ }
client_lock(cl);
non_block_events(co);
non_block_events(co);
client_unlock(cl);
- if (co->link)
- {
- iochan_setflags(iochan, ZOOM_connection_get_mask(co->link));
- iochan_setfd(iochan, ZOOM_connection_get_socket(co->link));
- }
+ iochan_update(co);
}
}
-
-// Disassociate connection from client
-static void connection_release(struct connection *co)
+void connection_release2(struct connection *co)
{
- struct client *cl = co->client;
-
- if (!cl)
- return;
- client_set_connection(cl, 0);
co->client = 0;
}
-void connect_resolver_host(struct host *host, iochan_man_t iochan_man)
-{
- struct connection *con;
-
- yaz_mutex_enter(host->mutex);
- con = host->connections;
- while (con)
- {
- if (con->state == Conn_Closed)
- {
- if (!host->ipport || !con->client) /* unresolved or no client */
- {
- remove_connection_from_host(con);
- yaz_mutex_leave(host->mutex);
- connection_destroy(con);
- }
- else
- {
- struct session_database *sdb = client_get_database(con->client);
- if (sdb)
- {
- yaz_mutex_leave(host->mutex);
- client_start_search(con->client);
- }
- else
- {
- remove_connection_from_host(con);
- yaz_mutex_leave(host->mutex);
- connection_destroy(con);
- }
- }
- /* start all over .. at some point it will be NULL */
- yaz_mutex_enter(host->mutex);
- con = host->connections;
- }
- else
- {
- yaz_log(YLOG_LOG, "connect_resolver_host: state=%d", con->state);
- con = con->next;
- }
- }
- yaz_mutex_leave(host->mutex);
-}
-
-static struct host *connection_get_host(struct connection *con)
-{
- return con->host;
-}
-
static int connection_connect(struct connection *con, iochan_man_t iochan_man)
{
- struct host *host = connection_get_host(con);
ZOOM_options zoptions = ZOOM_options_create();
const char *auth;
const char *charset;
const char *sru;
const char *sru_version = 0;
const char *value;
+ int r = 0;
WRBUF w;
- struct session_database *sdb = client_get_database(con->client);
+ struct client *cl = con->client;
+ struct session_database *sdb = client_get_database(cl);
const char *apdulog = session_setting_oneval(sdb, PZ_APDULOG);
+ struct session *se = client_get_session(cl);
+ const char *memcached = session_setting_oneval(sdb, PZ_MEMCACHED);
+ const char *redis = session_setting_oneval(sdb, PZ_REDIS);
assert(con);
if ((charset = session_setting_oneval(sdb, PZ_NEGOTIATION_CHARSET)))
ZOOM_options_set(zoptions, "charset", charset);
+ if (memcached && *memcached)
+ ZOOM_options_set(zoptions, "memcached", memcached);
+ if (redis && *redis)
+ ZOOM_options_set(zoptions, "redis", redis);
- assert(host->ipport);
- if (host->proxy)
- {
- yaz_log(YLOG_LOG, "proxy=%s", host->ipport);
- ZOOM_options_set(zoptions, "proxy", host->ipport);
- }
- else
+ if (con->zproxy)
{
- assert(host->tproxy);
- yaz_log(YLOG_LOG, "tproxy=%s", host->ipport);
- ZOOM_options_set(zoptions, "tproxy", host->ipport);
+ yaz_log(YLOG_LOG, "proxy=%s", con->zproxy);
+ ZOOM_options_set(zoptions, "proxy", con->zproxy);
}
-
if (apdulog && *apdulog)
ZOOM_options_set(zoptions, "apdulog", apdulog);
{
/* allow splitting user and reset with a blank always */
const char *cp1 = strchr(auth, ' ');
- if (!cp1 && sru && *sru_version)
+ if (!cp1 && sru && *sru)
cp1 = strchr(auth, '/');
if (!cp1)
{
if (!(con->link = ZOOM_connection_create(zoptions)))
{
- yaz_log(YLOG_FATAL|YLOG_ERRNO, "Failed to create ZOOM Connection");
+ session_log(se, YLOG_WARN, "%s: ZOOM_connection_create failed",
+ client_get_id(cl));
ZOOM_options_destroy(zoptions);
return -1;
}
con->state = Conn_Connecting;
iochan_settimeout(con->iochan, con->operation_timeout);
iochan_setdata(con->iochan, con);
- iochan_add(iochan_man, con->iochan);
-
- client_set_state(con->client, Client_Connecting);
+ if (iochan_add(iochan_man, con->iochan, 20))
+ {
+ session_log(se, YLOG_WARN, "%s: out of connections", client_get_id(cl));
+ iochan_destroy(con->iochan);
+ con->iochan = 0;
+ ZOOM_connection_destroy(con->link);
+ con->link = 0;
+ r = -1;
+ }
+ else
+ {
+ client_set_state(cl, Client_Connecting);
+ }
ZOOM_options_destroy(zoptions);
wrbuf_destroy(w);
- return 0;
+ return r;
}
// Ensure that client has a connection associated
struct session_database *sdb = client_get_database(cl);
const char *zproxy = session_setting_oneval(sdb, PZ_ZPROXY);
const char *url = session_setting_oneval(sdb, PZ_URL);
- const char *sru = session_setting_oneval(sdb, PZ_SRU);
- struct host *host = 0;
- int default_port = *sru ? 80 : 210;
if (zproxy && zproxy[0] == '\0')
zproxy = 0;
if (!url || !*url)
url = sdb->database->id;
- host = find_host(client_get_session(cl)->service->server->database_hosts,
- url, zproxy, default_port, iochan_man);
-
yaz_log(YLOG_DEBUG, "client_prep_connection: target=%s url=%s",
client_get_id(cl), url);
- if (!host)
- return 0;
co = client_get_connection(cl);
if (co)
- {
- assert(co->host);
- if (co->host == host && client_get_state(cl) == Client_Idle)
- {
- return 2;
- }
- connection_release(co);
- co = 0;
- }
+ return 2;
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);
- 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) &&
- !strcmp(url, co->url) &&
- (!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_id(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;
- /* ensure that connection is only assigned to this client
- by marking the client non Idle */
- client_set_state(cl, Client_Working);
- yaz_mutex_leave(host->mutex);
- co->operation_timeout = operation_timeout;
- co->session_timeout = session_timeout;
- /* tells ZOOM to reconnect if necessary. Disabled becuase
- the ZOOM_connection_connect flushes the task queue */
- ZOOM_connection_connect(co->link, 0, 0);
- }
- else
- {
- yaz_mutex_leave(host->mutex);
- co = connection_create(cl, url, host,
- operation_timeout, session_timeout,
- iochan_man);
- }
- assert(co->host);
+ co = connection_create(cl, url, zproxy,
+ operation_timeout, session_timeout,
+ iochan_man);
}
if (co && co->link)
projects / pazpar2-moved-to-github.git / blobdiff