/* This file is part of Pazpar2.
- Copyright (C) 2006-2010 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"
+/* 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
*/
struct connection {
IOCHAN iochan;
ZOOM_connection link;
- struct host *host;
struct client *client;
char *zproxy;
+ char *url;
enum {
- Conn_Resolving,
+ Conn_Closed,
Conn_Connecting,
Conn_Open
} state;
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);
- yaz_mutex_enter(con->host->mutex);
- while (*conp)
- {
- if (*conp == con)
- {
- *conp = (*conp)->next;
- break;
- }
- conp = &(*conp)->next;
- }
- yaz_mutex_leave(con->host->mutex);
+void connection_mark_dead(struct connection *co)
+{
+ iochan_settimeout(co->iochan, 1);
}
// 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);
if (co->client)
{
client_disconnect(co->client);
}
- remove_connection_from_host(co);
xfree(co->zproxy);
+ 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,
+ const char *url,
+ const char *zproxy,
int operation_timeout,
int session_timeout,
iochan_man_t iochan_man)
{
- struct connection *new;
- struct host *host = client_get_host(cl);
-
- new = xmalloc(sizeof(*new));
- new->host = host;
-
- yaz_mutex_enter(host->mutex);
- new->next = new->host->connections;
- new->host->connections = new;
- yaz_mutex_leave(host->mutex);
-
- new->client = cl;
- new->zproxy = 0;
- client_set_connection(cl, new);
- new->link = 0;
- new->state = Conn_Resolving;
- new->operation_timeout = operation_timeout;
- new->session_timeout = session_timeout;
- if (host->ipport)
- connection_connect(new, iochan_man);
- return new;
+ struct connection *co;
+ int ret;
+
+ co = xmalloc(sizeof(*co));
+
+ 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;
+
+ ret = connection_connect(co, iochan_man);
+ connection_use(1);
+ if (ret)
+ { /* error */
+ connection_destroy(co);
+ co = 0;
+ }
+ return co;
}
static void non_block_events(struct connection *co)
if (!cl)
continue;
ev = ZOOM_connection_last_event(link);
-
- client_incref(cl);
-#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;
- 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));
+ 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);
+ }
+ 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);
}
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_url(cl));
co->state = Conn_Open;
break;
case ZOOM_EVENT_RECV_SEARCH:
client_search_response(cl);
break;
case ZOOM_EVENT_RECV_RECORD:
- client_record_response(cl);
- got_records = 1;
+ 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_url(cl));
+ ev, client_get_id(cl));
+ break;
}
- client_destroy(cl);
}
if (got_records)
{
struct client *cl = co->client;
if (cl)
- {
- client_incref(cl);
client_got_records(cl);
- client_destroy(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)
- yaz_log(YLOG_WARN, "No task was executed for connection");
+ {
+ 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 = co->client;
+ struct client *cl;
- if (!cl)
+ 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);
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);
+
+ connection_destroy(co);
}
else
{
+ if (ZOOM_connection_is_idle(co->link))
+ {
+ connection_destroy(co);
+ return;
+ }
+ client_lock(cl);
non_block_events(co);
ZOOM_connection_fire_event_socket(co->link, event);
-
- non_block_events(co);
- }
-}
-
-
-// Disassociate connection from client
-void connection_release(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;
+ non_block_events(co);
+ client_unlock(cl);
-start:
- yaz_mutex_enter(host->mutex);
- con = host->connections;
- while (con)
- {
- if (con->state == Conn_Resolving)
- {
- if (!host->ipport) /* unresolved */
- {
- yaz_mutex_leave(host->mutex);
- connection_destroy(con);
- goto start;
- /* start all over .. at some point it will be NULL */
- }
- else if (!con->client)
- {
- yaz_mutex_leave(host->mutex);
- connection_destroy(con);
- /* start all over .. at some point it will be NULL */
- goto start;
- }
- else
- {
- yaz_mutex_leave(host->mutex);
- connection_connect(con, iochan_man);
- client_start_search(con->client);
- goto start;
- }
- }
- else
- {
- yaz_log(YLOG_LOG, "connect_resolver_host: state=%d", con->state);
- con = con->next;
- }
+ iochan_update(co);
}
- yaz_mutex_leave(host->mutex);
}
-static struct host *connection_get_host(struct connection *con)
+void connection_release2(struct connection *co)
{
- 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);
+ co->client = 0;
}
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;
+ const char *value;
+ int r = 0;
+ WRBUF w;
- struct session_database *sdb = client_get_database(con->client);
- const char *zproxy = session_setting_oneval(sdb, PZ_ZPROXY);
+ 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(host->ipport);
assert(con);
ZOOM_options_set(zoptions, "async", "1");
ZOOM_options_set(zoptions, "implementationName", PACKAGE_NAME);
ZOOM_options_set(zoptions, "implementationVersion", VERSION);
-
+
if ((charset = session_setting_oneval(sdb, PZ_NEGOTIATION_CHARSET)))
ZOOM_options_set(zoptions, "charset", charset);
-
- if (zproxy && *zproxy)
+ if (memcached && *memcached)
+ ZOOM_options_set(zoptions, "memcached", memcached);
+ if (redis && *redis)
+ ZOOM_options_set(zoptions, "redis", redis);
+
+ if (con->zproxy)
{
- con->zproxy = xstrdup(zproxy);
- ZOOM_options_set(zoptions, "proxy", zproxy);
+ yaz_log(YLOG_LOG, "proxy=%s", con->zproxy);
+ ZOOM_options_set(zoptions, "proxy", con->zproxy);
}
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)))
{
- yaz_log(YLOG_FATAL|YLOG_ERRNO, "Failed to create ZOOM Connection");
+ /* 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)))
+ {
+ session_log(se, YLOG_WARN, "%s: ZOOM_connection_create failed",
+ client_get_id(cl));
ZOOM_options_destroy(zoptions);
return -1;
}
- if (sru && *sru)
+ w = wrbuf_alloc();
+ if (sru && *sru && !strstr(con->url, "://"))
+ wrbuf_puts(w, "http://");
+ if (strchr(con->url, '#'))
{
- char http_hostport[512];
- strcpy(http_hostport, "http://");
- strcat(http_hostport, host->hostport);
- ZOOM_connection_connect(link, http_hostport, 0);
+ const char *cp = strchr(con->url, '#');
+ wrbuf_write(w, con->url, cp - con->url);
}
else
- ZOOM_connection_connect(link, host->ipport, 0);
-
- con->link = link;
- con->iochan = iochan_create(0, connection_handler, 0, "connection_socket");
+ wrbuf_puts(w, con->url);
+
+ ZOOM_connection_connect(con->link, wrbuf_cstr(w), 0);
+
+ 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);
- iochan_setsocketfun(con->iochan, socketfun);
- iochan_setmaskfun(con->iochan, maskfun);
- iochan_add(iochan_man, con->iochan);
-
- /* this fragment is bad DRY: from client_prep_connection */
- 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);
- return 0;
-}
-
-const char *connection_get_url(struct connection *co)
-{
- return client_get_url(co->client);
+ wrbuf_destroy(w);
+ return r;
}
// 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);
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);
if (zproxy && zproxy[0] == '\0')
zproxy = 0;
- if (!host)
- return 0;
-
- co = client_get_connection(cl);
+ if (!url || !*url)
+ url = sdb->database->id;
- yaz_log(YLOG_DEBUG, "Client prep %s", client_get_url(cl));
+ yaz_log(YLOG_DEBUG, "client_prep_connection: target=%s url=%s",
+ client_get_id(cl), url);
+ co = client_get_connection(cl);
+ if (co)
+ return 2;
if (!co)
{
- // 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))
- break;
- }
- if (co)
- {
- 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, operation_timeout, session_timeout,
- iochan_man);
- }
+ co = connection_create(cl, url, zproxy,
+ operation_timeout, session_timeout,
+ iochan_man);
}
if (co && co->link)
projects / pazpar2-moved-to-github.git / blobdiff