/* This file is part of Pazpar2.
- Copyright (C) 2006-2009 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/comstack.h>
#include <yaz/tcpip.h>
#include "connection.h"
-#include "eventl.h"
-#include "pazpar2.h"
+#include "session.h"
#include "host.h"
#include "client.h"
#include "settings.h"
-#include "parameters.h"
+
+/* connection counting (1) , disable connection counting (0) */
+#if 1
+static YAZ_MUTEX g_mutex = 0;
+static int no_connections = 0;
+static int total_no_connections = 0;
+
+static int connection_use(int delta)
+{
+ int result;
+ if (!g_mutex)
+ yaz_mutex_create(&g_mutex);
+ yaz_mutex_enter(g_mutex);
+ no_connections += delta;
+ result = no_connections;
+ if (delta > 0)
+ total_no_connections += delta;
+ yaz_mutex_leave(g_mutex);
+ if (delta == 0)
+ return result;
+ yaz_log(YLOG_LOG, "%s connections=%d", delta > 0 ? "INC" : "DEC",
+ no_connections);
+ return result;
+}
+
+int connections_count(void)
+{
+ return connection_use(0);
+}
+
+
+#else
+#define connection_use(x)
+#define connections_count(x) 0
+#define connections_count_total(x) 0
+#endif
/** \brief Represents a physical, reusable connection to a remote Z39.50 host
ZOOM_connection link;
struct host *host;
struct client *client;
- char *ibuf;
- int ibufsize;
char *zproxy;
+ char *url;
enum {
- Conn_Resolving,
+ Conn_Closed,
Conn_Connecting,
Conn_Open
} state;
+ int operation_timeout;
+ int session_timeout;
struct connection *next; // next for same host or next in free list
};
-static struct connection *connection_freelist = 0;
-
-static int connection_connect(struct connection *con);
+static int connection_connect(struct connection *con, iochan_man_t iochan_man);
static int connection_is_idle(struct connection *co)
{
if (!ZOOM_connection_is_idle(link))
return 0;
event = ZOOM_connection_peek_event(link);
- if (event == ZOOM_EVENT_NONE || event == ZOOM_EVENT_END)
+ if (event == ZOOM_EVENT_NONE)
return 1;
else
return 0;
if (*conp == con)
{
*conp = (*conp)->next;
- return;
+ break;
}
conp = &(*conp)->next;
}
- assert(*conp == 0);
+ yaz_cond_broadcast(con->host->cond_ready);
}
// Close connection and recycle structure
-void connection_destroy(struct connection *co)
+static void connection_destroy(struct connection *co)
{
if (co->link)
{
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->url);
- remove_connection_from_host(co);
if (co->client)
{
client_disconnect(co->client);
}
+
xfree(co->zproxy);
- co->zproxy = 0;
- co->next = connection_freelist;
- connection_freelist = co;
+ xfree(co->url);
+ xfree(co);
+ connection_use(-1);
}
-// Creates a new connection for client, associated with the host of
+// Creates a new connection for client, associated with the host of
// client's database
-static struct connection *connection_create(struct client *cl)
+static struct connection *connection_create(struct client *cl,
+ const char *url,
+ struct host *host,
+ int operation_timeout,
+ int session_timeout,
+ iochan_man_t iochan_man)
{
- struct connection *new;
- struct host *host = client_get_host(cl);
+ struct connection *co;
+
+ co = xmalloc(sizeof(*co));
+ co->host = host;
+
+ co->client = cl;
+ co->url = xstrdup(url);
+ co->zproxy = 0;
+ client_set_connection(cl, co);
+ co->link = 0;
+ co->state = Conn_Closed;
+ co->operation_timeout = operation_timeout;
+ co->session_timeout = session_timeout;
- if ((new = connection_freelist))
- connection_freelist = new->next;
- else
- {
- new = xmalloc(sizeof (struct connection));
- new->ibuf = 0;
- new->ibufsize = 0;
- }
- new->host = host;
- new->next = new->host->connections;
- new->host->connections = new;
- new->client = cl;
- new->zproxy = 0;
- client_set_connection(cl, new);
- new->link = 0;
- new->state = Conn_Resolving;
if (host->ipport)
- connection_connect(new);
- return new;
+ connection_connect(co, iochan_man);
+
+ yaz_mutex_enter(host->mutex);
+ co->next = co->host->connections;
+ co->host->connections = co;
+ yaz_mutex_leave(host->mutex);
+
+ connection_use(1);
+ return co;
}
static void non_block_events(struct connection *co)
{
- struct client *cl = co->client;
+ int got_records = 0;
IOCHAN iochan = co->iochan;
ZOOM_connection link = co->link;
while (1)
{
+ struct client *cl = co->client;
int ev;
int r = ZOOM_event_nonblock(1, &link);
if (!r)
break;
+ if (!cl)
+ 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)
+ switch (ev)
{
+ case ZOOM_EVENT_TIMEOUT:
+ break;
case ZOOM_EVENT_END:
{
const char *error, *addinfo;
- if (ZOOM_connection_error(link, &error, &addinfo))
+ int err;
+ if ((err = ZOOM_connection_error(link, &error, &addinfo)))
{
yaz_log(YLOG_LOG, "Error %s from %s",
- error, client_get_url(cl));
+ error, client_get_id(cl));
+ client_set_diagnostic(cl, err, error, addinfo);
+ client_set_state(cl, Client_Error);
+ }
+ else
+ {
+ iochan_settimeout(iochan, co->session_timeout);
+ client_set_state(cl, Client_Idle);
}
- client_set_state(cl, Client_Idle);
+ yaz_cond_broadcast(co->host->cond_ready);
}
break;
case ZOOM_EVENT_SEND_DATA:
break;
case ZOOM_EVENT_SEND_APDU:
client_set_state(co->client, Client_Working);
+ iochan_settimeout(iochan, co->operation_timeout);
break;
case ZOOM_EVENT_RECV_APDU:
break;
case ZOOM_EVENT_CONNECT:
- yaz_log(YLOG_LOG, "Connected to %s", client_get_url(cl));
+ yaz_log(YLOG_LOG, "Connected to %s", client_get_id(cl));
co->state = Conn_Open;
- iochan_settimeout(iochan, global_parameters.z3950_session_timeout);
break;
case ZOOM_EVENT_RECV_SEARCH:
client_search_response(cl);
break;
case ZOOM_EVENT_RECV_RECORD:
- client_record_response(cl);
+ client_record_response(cl, &got_records);
break;
default:
yaz_log(YLOG_LOG, "Unhandled event (%d) from %s",
- ev, client_get_url(cl));
+ ev, client_get_id(cl));
+ break;
+ }
+ }
+ if (got_records)
+ {
+ struct client *cl = co->client;
+ if (cl)
+ {
+ client_check_preferred_watch(cl);
+ client_got_records(cl);
}
}
}
void connection_continue(struct connection *co)
{
- non_block_events(co);
+ int r = ZOOM_connection_exec_task(co->link);
+ if (!r)
+ {
+ struct client *cl = co->client;
+
+ client_lock(cl);
+ non_block_events(co);
+ client_unlock(cl);
+ }
+ else
+ {
+ iochan_setflags(co->iochan, ZOOM_connection_get_mask(co->link));
+ iochan_setfd(co->iochan, ZOOM_connection_get_socket(co->link));
+ }
}
static void connection_handler(IOCHAN iochan, int event)
{
struct connection *co = iochan_getdata(iochan);
- struct client *cl = co->client;
- struct session *se = 0;
+ struct client *cl;
+ struct host *host = co->host;
- if (cl)
- se = client_get_session(cl);
- else
+ yaz_mutex_enter(host->mutex);
+ cl = co->client;
+ if (!cl)
{
+ /* no client associated with it.. We are probably getting
+ 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);
- return;
}
-
- if (event & EVENT_TIMEOUT)
+ else if (event & EVENT_TIMEOUT)
{
- if (co->state == Conn_Connecting)
- {
- yaz_log(YLOG_WARN, "connect timeout %s", client_get_url(cl));
- client_fatal(cl);
- }
- else
- {
- yaz_log(YLOG_LOG, "idle timeout %s", client_get_url(cl));
- connection_destroy(co);
- }
+ ZOOM_connection_fire_event_timeout(co->link);
+ client_lock(cl);
+ 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);
+
+ client_lock(cl);
non_block_events(co);
ZOOM_connection_fire_event_socket(co->link, event);
-
+
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));
+ }
}
}
// Disassociate connection from client
-void connection_release(struct connection *co)
+static void connection_release(struct connection *co)
{
struct client *cl = co->client;
- yaz_log(YLOG_DEBUG, "Connection release %s", co->host->hostport);
if (!cl)
return;
client_set_connection(cl, 0);
co->client = 0;
}
-void connect_resolver_host(struct host *host)
+void connect_resolver_host(struct host *host, iochan_man_t iochan_man)
{
- struct connection *con = host->connections;
+ struct connection *con;
+
+ yaz_mutex_enter(host->mutex);
+ con = host->connections;
while (con)
{
- if (con->state == Conn_Resolving)
+ if (con->state == Conn_Closed)
{
- if (!host->ipport) /* unresolved */
- {
- connection_destroy(con);
- /* start all over .. at some point it will be NULL */
- con = host->connections;
- continue;
- }
- else if (!con->client)
+ if (!host->ipport || !con->client) /* unresolved or no client */
{
+ remove_connection_from_host(con);
+ yaz_mutex_leave(host->mutex);
connection_destroy(con);
- /* start all over .. at some point it will be NULL */
- con = host->connections;
- continue;
}
else
{
- connection_connect(con);
- client_start_search(con->client);
+ 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;
}
- con = con->next;
}
+ yaz_mutex_leave(host->mutex);
}
static struct host *connection_get_host(struct connection *con)
return con->host;
}
-// Callback for use by event loop
-// We do this because ZOOM connections don't always have (the same) sockets
-static int socketfun(IOCHAN c)
-{
- struct connection *co = iochan_getdata(c);
- if (!co->link)
- return -1;
- return ZOOM_connection_get_socket(co->link);
-}
-
-// Because ZOOM always knows what events it is interested in; we may not
-static int maskfun(IOCHAN c)
-{
- struct connection *co = iochan_getdata(c);
- if (!co->link)
- return 0;
-
- // This is cheating a little, and assuming that eventl mask IDs are always
- // the same as ZOOM-C's.
- return ZOOM_connection_get_mask(co->link);
-}
-
-static int connection_connect(struct connection *con)
+static int connection_connect(struct connection *con, iochan_man_t iochan_man)
{
- ZOOM_connection link = 0;
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;
- char ipport[512] = "";
+ const char *value;
+ WRBUF w;
struct session_database *sdb = client_get_database(con->client);
- const char *zproxy = session_setting_oneval(sdb, PZ_ZPROXY);
const char *apdulog = session_setting_oneval(sdb, PZ_APDULOG);
+ const char *memcached = session_setting_oneval(sdb, PZ_MEMCACHED);
+ const char *redis = session_setting_oneval(sdb, PZ_REDIS);
- assert(host->ipport);
assert(con);
ZOOM_options_set(zoptions, "async", "1");
ZOOM_options_set(zoptions, "implementationName", PACKAGE_NAME);
ZOOM_options_set(zoptions, "implementationVersion", VERSION);
- if (zproxy && *zproxy)
+
+ 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)
{
- con->zproxy = xstrdup(zproxy);
- ZOOM_options_set(zoptions, "proxy", zproxy);
+ yaz_log(YLOG_LOG, "proxy=%s", host->ipport);
+ ZOOM_options_set(zoptions, "proxy", host->ipport);
}
+ else
+ {
+ assert(host->tproxy);
+ yaz_log(YLOG_LOG, "tproxy=%s", host->ipport);
+ ZOOM_options_set(zoptions, "tproxy", host->ipport);
+ }
+
if (apdulog && *apdulog)
ZOOM_options_set(zoptions, "apdulog", apdulog);
- if ((auth = session_setting_oneval(sdb, PZ_AUTHENTICATION)))
- ZOOM_options_set(zoptions, "user", auth);
+
if ((sru = session_setting_oneval(sdb, PZ_SRU)) && *sru)
ZOOM_options_set(zoptions, "sru", sru);
- if ((sru_version = session_setting_oneval(sdb, PZ_SRU_VERSION))
+ 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)))
+ if ((auth = session_setting_oneval(sdb, PZ_AUTHENTICATION)))
+ {
+ /* allow splitting user and reset with a blank always */
+ const char *cp1 = strchr(auth, ' ');
+ if (!cp1 && sru && *sru)
+ cp1 = strchr(auth, '/');
+ if (!cp1)
+ {
+ /* Z39.50 user/password style, or no password for SRU */
+ ZOOM_options_set(zoptions, "user", auth);
+ }
+ else
+ {
+ /* now consider group as well */
+ const char *cp2 = strchr(cp1 + 1, ' ');
+
+ ZOOM_options_setl(zoptions, "user", auth, cp1 - auth);
+ if (!cp2)
+ ZOOM_options_set(zoptions, "password", cp1 + 1);
+ else
+ {
+ ZOOM_options_setl(zoptions, "group", cp1 + 1, cp2 - cp1 - 1);
+ ZOOM_options_set(zoptions, "password", cp2 + 1);
+ }
+ }
+ }
+
+ value = session_setting_oneval(sdb, PZ_AUTHENTICATION_MODE);
+ if (value && *value)
+ ZOOM_options_set(zoptions, "authenticationMode", value);
+
+ if (!(con->link = ZOOM_connection_create(zoptions)))
{
yaz_log(YLOG_FATAL|YLOG_ERRNO, "Failed to create ZOOM Connection");
ZOOM_options_destroy(zoptions);
return -1;
}
- if (sru && *sru)
- strcpy(ipport, "http://");
- strcat(ipport, host->ipport);
+ w = wrbuf_alloc();
+ if (sru && *sru && !strstr(con->url, "://"))
+ wrbuf_puts(w, "http://");
+ if (strchr(con->url, '#'))
+ {
+ const char *cp = strchr(con->url, '#');
+ wrbuf_write(w, con->url, cp - con->url);
+ }
+ else
+ wrbuf_puts(w, con->url);
+
+ ZOOM_connection_connect(con->link, wrbuf_cstr(w), 0);
- ZOOM_connection_connect(link, ipport, 0);
-
- con->link = link;
- con->iochan = iochan_create(0, connection_handler, 0);
+ con->iochan = iochan_create(-1, connection_handler, 0, "connection_socket");
con->state = Conn_Connecting;
- iochan_settimeout(con->iochan, global_parameters.z3950_connect_timeout);
+ iochan_settimeout(con->iochan, con->operation_timeout);
iochan_setdata(con->iochan, con);
- iochan_setsocketfun(con->iochan, socketfun);
- iochan_setmaskfun(con->iochan, maskfun);
- pazpar2_add_channel(con->iochan);
+ iochan_add(iochan_man, con->iochan);
- /* this fragment is bad DRY: from client_prep_connection */
client_set_state(con->client, Client_Connecting);
ZOOM_options_destroy(zoptions);
- // This creates the connection
- ZOOM_connection_process(link);
+ wrbuf_destroy(w);
return 0;
}
-const char *connection_get_url(struct connection *co)
-{
- return client_get_url(co->client);
-}
-
// Ensure that client has a connection associated
-int client_prep_connection(struct client *cl)
+int client_prep_connection(struct client *cl,
+ int operation_timeout, int session_timeout,
+ iochan_man_t iochan_man,
+ const struct timeval *abstime)
{
struct connection *co;
- struct session *se = client_get_session(cl);
- struct host *host = client_get_host(cl);
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;
- co = client_get_connection(cl);
+ if (!url || !*url)
+ url = sdb->database->id;
- yaz_log(YLOG_DEBUG, "Client prep %s", client_get_url(cl));
+ 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;
+ }
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
- for (co = host->connections; co; co = co->next)
- if (connection_is_idle(co) &&
- (!co->client || client_get_session(co->client) != se) &&
- !strcmp(ZOOM_connection_option_get(co->link, "user"),
- session_setting_oneval(client_get_database(cl),
- PZ_AUTHENTICATION)))
+ yaz_mutex_enter(host->mutex);
+ while (1)
+ {
+ int num_connections = 0;
+ for (co = host->connections; co; co = co->next)
+ num_connections++;
+ if (reuse_connections)
{
- if (zproxy == 0 && co->zproxy == 0)
- break;
- if (zproxy && co->zproxy && !strcmp(zproxy, co->zproxy))
+ 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
{
- co = connection_create(cl);
+ yaz_mutex_leave(host->mutex);
+ co = connection_create(cl, url, host,
+ operation_timeout, session_timeout,
+ iochan_man);
}
+ assert(co->host);
}
if (co && co->link)
projects / pazpar2-moved-to-github.git / blobdiff