* collectd - src/postgresql.c
* Copyright (C) 2008, 2009 Sebastian Harl
* Copyright (C) 2009 Florian Forster
+ * All rights reserved.
*
- * This program 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 Software Foundation; only version 2 of the License is applicable.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
*
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
*
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
*
* Authors:
* Sebastian Harl <sh at tokkee.org>
int max_params_num;
/* user configuration */
+ udb_query_preparation_area_t **q_prep_areas;
udb_query_t **queries;
size_t queries_num;
+ cdtime_t interval;
+
char *host;
char *port;
char *database;
static udb_query_t **queries = NULL;
static size_t queries_num = 0;
-static c_psql_database_t *databases = NULL;
-static int databases_num = 0;
-
static c_psql_database_t *c_psql_database_new (const char *name)
{
c_psql_database_t *db;
- ++databases_num;
- if (NULL == (databases = (c_psql_database_t *)realloc (databases,
- databases_num * sizeof (*databases)))) {
+ db = (c_psql_database_t *)malloc (sizeof (*db));
+ if (NULL == db) {
log_err ("Out of memory.");
- exit (5);
+ return NULL;
}
- db = databases + (databases_num - 1);
-
db->conn = NULL;
C_COMPLAIN_INIT (&db->conn_complaint);
db->max_params_num = 0;
+ db->q_prep_areas = NULL;
db->queries = NULL;
db->queries_num = 0;
+ db->interval = 0;
+
db->database = sstrdup (name);
db->host = NULL;
db->port = NULL;
return db;
} /* c_psql_database_new */
-static void c_psql_database_delete (c_psql_database_t *db)
+static void c_psql_database_delete (void *data)
{
+ size_t i;
+
+ c_psql_database_t *db = data;
+
PQfinish (db->conn);
db->conn = NULL;
+ if (db->q_prep_areas)
+ for (i = 0; i < db->queries_num; ++i)
+ udb_query_delete_preparation_area (db->q_prep_areas[i]);
+ free (db->q_prep_areas);
+
sfree (db->queries);
db->queries_num = 0;
return;
} /* c_psql_database_delete */
+static int c_psql_connect (c_psql_database_t *db)
+{
+ char conninfo[4096];
+ char *buf = conninfo;
+ int buf_len = sizeof (conninfo);
+ int status;
+
+ if (! db)
+ return -1;
+
+ status = ssnprintf (buf, buf_len, "dbname = '%s'", db->database);
+ if (0 < status) {
+ buf += status;
+ buf_len -= status;
+ }
+
+ C_PSQL_PAR_APPEND (buf, buf_len, "host", db->host);
+ C_PSQL_PAR_APPEND (buf, buf_len, "port", db->port);
+ C_PSQL_PAR_APPEND (buf, buf_len, "user", db->user);
+ C_PSQL_PAR_APPEND (buf, buf_len, "password", db->password);
+ C_PSQL_PAR_APPEND (buf, buf_len, "sslmode", db->sslmode);
+ C_PSQL_PAR_APPEND (buf, buf_len, "krbsrvname", db->krbsrvname);
+ C_PSQL_PAR_APPEND (buf, buf_len, "service", db->service);
+
+ db->conn = PQconnectdb (conninfo);
+ db->proto_version = PQprotocolVersion (db->conn);
+ return 0;
+} /* c_psql_connect */
+
static int c_psql_check_connection (c_psql_database_t *db)
{
+ _Bool init = 0;
+
+ if (! db->conn) {
+ init = 1;
+
+ /* trigger c_release() */
+ if (0 == db->conn_complaint.interval)
+ db->conn_complaint.interval = 1;
+
+ c_psql_connect (db);
+ }
+
/* "ping" */
PQclear (PQexec (db->conn, "SELECT 42;"));
}
db->proto_version = PQprotocolVersion (db->conn);
- if (3 > db->proto_version)
- log_warn ("Protocol version %d does not support parameters.",
- db->proto_version);
}
db->server_version = PQserverVersion (db->conn);
- c_release (LOG_INFO, &db->conn_complaint,
- "Successfully reconnected to database %s", PQdb (db->conn));
+ if (c_would_release (&db->conn_complaint)) {
+ char *server_host;
+ int server_version;
+
+ server_host = PQhost (db->conn);
+ server_version = PQserverVersion (db->conn);
+
+ c_do_release (LOG_INFO, &db->conn_complaint,
+ "Successfully %sconnected to database %s (user %s) "
+ "at server %s%s%s (server version: %d.%d.%d, "
+ "protocol version: %d, pid: %d)", init ? "" : "re",
+ PQdb (db->conn), PQuser (db->conn),
+ C_PSQL_SOCKET3 (server_host, PQport (db->conn)),
+ C_PSQL_SERVER_VERSION3 (server_version),
+ db->proto_version, PQbackendPID (db->conn));
+
+ if (3 > db->proto_version)
+ log_warn ("Protocol version %d does not support parameters.",
+ db->proto_version);
+ }
return 0;
} /* c_psql_check_connection */
params[i] = db->user;
break;
case C_PSQL_PARAM_INTERVAL:
- ssnprintf (interval, sizeof (interval), "%i", interval_g);
+ ssnprintf (interval, sizeof (interval), "%.3f",
+ (db->interval > 0)
+ ? CDTIME_T_TO_DOUBLE (db->interval) : interval_g);
params[i] = interval;
break;
default:
NULL, NULL, /* return text data */ 0);
} /* c_psql_exec_query_params */
-static int c_psql_exec_query (c_psql_database_t *db, udb_query_t *q)
+static int c_psql_exec_query (c_psql_database_t *db, udb_query_t *q,
+ udb_query_preparation_area_t *prep_area)
{
PGresult *res;
* `BAIL_OUT'. */
column_names[col] = PQfname (res, col);
if (NULL == column_names[col]) {
- log_err ("Failed to resolv name of column %i.", col);
+ log_err ("Failed to resolve name of column %i.", col);
BAIL_OUT (-1);
}
}
else
host = db->host;
- status = udb_query_prepare_result (q, host, "postgresql",
- db->database, column_names, (size_t) column_num);
+ status = udb_query_prepare_result (q, prep_area, host, "postgresql",
+ db->database, column_names, (size_t) column_num, db->interval);
if (0 != status) {
log_err ("udb_query_prepare_result failed with status %i.",
status);
if (col < column_num)
continue;
- status = udb_query_handle_result (q, column_values);
+ status = udb_query_handle_result (q, prep_area, column_values);
if (status != 0) {
log_err ("udb_query_handle_result failed with status %i.",
status);
}
} /* for (row = 0; row < rows_num; ++row) */
+ udb_query_finish_result (q, prep_area);
+
BAIL_OUT (0);
#undef BAIL_OUT
} /* c_psql_exec_query */
-static int c_psql_read (void)
+static int c_psql_read (user_data_t *ud)
{
+ c_psql_database_t *db;
+
int success = 0;
int i;
- for (i = 0; i < databases_num; ++i) {
- c_psql_database_t *db = databases + i;
+ if ((ud == NULL) || (ud->data == NULL)) {
+ log_err ("c_psql_read: Invalid user data.");
+ return -1;
+ }
- int j;
+ db = ud->data;
- assert (NULL != db->database);
+ assert (NULL != db->database);
- if (0 != c_psql_check_connection (db))
- continue;
+ if (0 != c_psql_check_connection (db))
+ return -1;
- for (j = 0; j < db->queries_num; ++j)
- {
- udb_query_t *q;
+ for (i = 0; i < db->queries_num; ++i)
+ {
+ udb_query_preparation_area_t *prep_area;
+ udb_query_t *q;
- q = db->queries[j];
+ prep_area = db->q_prep_areas[i];
+ q = db->queries[i];
- if ((0 != db->server_version)
+ if ((0 != db->server_version)
&& (udb_query_check_version (q, db->server_version) <= 0))
- continue;
-
- c_psql_exec_query (db, q);
- }
+ continue;
- ++success;
+ if (0 == c_psql_exec_query (db, q, prep_area))
+ success = 1;
}
if (! success)
static int c_psql_shutdown (void)
{
- int i;
-
- if ((NULL == databases) || (0 == databases_num))
- return 0;
-
- plugin_unregister_read ("postgresql");
- plugin_unregister_shutdown ("postgresql");
-
- for (i = 0; i < databases_num; ++i)
- c_psql_database_delete (databases + i);
-
- sfree (databases);
- databases_num = 0;
+ plugin_unregister_read_group ("postgresql");
udb_query_free (queries, queries_num);
queries = NULL;
return 0;
} /* c_psql_shutdown */
-static int c_psql_init (void)
-{
- int i;
-
- if ((NULL == databases) || (0 == databases_num))
- return 0;
-
- for (i = 0; i < databases_num; ++i) {
- c_psql_database_t *db = databases + i;
-
- char conninfo[4096];
- char *buf = conninfo;
- int buf_len = sizeof (conninfo);
- int status;
-
- char *server_host;
- int server_version;
-
- /* this will happen during reinitialization */
- if (NULL != db->conn) {
- c_psql_check_connection (db);
- continue;
- }
-
- status = ssnprintf (buf, buf_len, "dbname = '%s'", db->database);
- if (0 < status) {
- buf += status;
- buf_len -= status;
- }
-
- C_PSQL_PAR_APPEND (buf, buf_len, "host", db->host);
- C_PSQL_PAR_APPEND (buf, buf_len, "port", db->port);
- C_PSQL_PAR_APPEND (buf, buf_len, "user", db->user);
- C_PSQL_PAR_APPEND (buf, buf_len, "password", db->password);
- C_PSQL_PAR_APPEND (buf, buf_len, "sslmode", db->sslmode);
- C_PSQL_PAR_APPEND (buf, buf_len, "krbsrvname", db->krbsrvname);
- C_PSQL_PAR_APPEND (buf, buf_len, "service", db->service);
-
- db->conn = PQconnectdb (conninfo);
- if (0 != c_psql_check_connection (db))
- continue;
-
- db->proto_version = PQprotocolVersion (db->conn);
-
- server_host = PQhost (db->conn);
- server_version = PQserverVersion (db->conn);
- log_info ("Sucessfully connected to database %s (user %s) "
- "at server %s%s%s (server version: %d.%d.%d, "
- "protocol version: %d, pid: %d)",
- PQdb (db->conn), PQuser (db->conn),
- C_PSQL_SOCKET3 (server_host, PQport (db->conn)),
- C_PSQL_SERVER_VERSION3 (server_version),
- db->proto_version, PQbackendPID (db->conn));
-
- if (3 > db->proto_version)
- log_warn ("Protocol version %d does not support parameters.",
- db->proto_version);
- }
-
- plugin_register_read ("postgresql", c_psql_read);
- plugin_register_shutdown ("postgresql", c_psql_shutdown);
- return 0;
-} /* c_psql_init */
-
static int config_set_s (char *name, char **var, const oconfig_item_t *ci)
{
if ((0 != ci->children_num) || (1 != ci->values_num)
{
c_psql_database_t *db;
+ char cb_name[DATA_MAX_NAME_LEN];
+ struct timespec cb_interval = { 0, 0 };
+ user_data_t ud;
+
int i;
if ((1 != ci->values_num)
return 1;
}
+ memset (&ud, 0, sizeof (ud));
+
db = c_psql_database_new (ci->values[0].value.string);
+ if (db == NULL)
+ return -1;
for (i = 0; i < ci->children_num; ++i) {
oconfig_item_t *c = ci->children + i;
else if (0 == strcasecmp (c->key, "Query"))
udb_query_pick_from_list (c, queries, queries_num,
&db->queries, &db->queries_num);
+ else if (0 == strcasecmp (c->key, "Interval"))
+ cf_util_get_cdtime (c, &db->interval);
else
log_warn ("Ignoring unknown config key \"%s\".", c->key);
}
/* If no `Query' options were given, add the default queries.. */
- if (db->queries_num == 0)
- {
+ if (db->queries_num == 0) {
for (i = 0; i < def_queries_num; i++)
udb_query_pick_from_list_by_name (def_queries[i],
queries, queries_num,
&db->queries, &db->queries_num);
}
+ if (db->queries_num > 0) {
+ db->q_prep_areas = (udb_query_preparation_area_t **) calloc (
+ db->queries_num, sizeof (*db->q_prep_areas));
+
+ if (db->q_prep_areas == NULL) {
+ log_err ("Out of memory.");
+ c_psql_database_delete (db);
+ return -1;
+ }
+ }
+
for (i = 0; (size_t)i < db->queries_num; ++i) {
c_psql_user_data_t *data;
data = udb_query_get_user_data (db->queries[i]);
if ((data != NULL) && (data->params_num > db->max_params_num))
db->max_params_num = data->params_num;
+
+ db->q_prep_areas[i]
+ = udb_query_allocate_preparation_area (db->queries[i]);
+
+ if (db->q_prep_areas[i] == NULL) {
+ log_err ("Out of memory.");
+ c_psql_database_delete (db);
+ return -1;
+ }
}
+
+ ud.data = db;
+ ud.free_func = c_psql_database_delete;
+
+ ssnprintf (cb_name, sizeof (cb_name), "postgresql-%s", db->database);
+
+ CDTIME_T_TO_TIMESPEC (db->interval, &cb_interval);
+
+ plugin_register_complex_read ("postgresql", cb_name, c_psql_read,
+ /* interval = */ (db->interval > 0) ? &cb_interval : NULL,
+ &ud);
return 0;
} /* c_psql_config_database */
if (0 == strcasecmp (c->key, "Query"))
udb_query_create (&queries, &queries_num, c,
- /* callback = */ config_query_callback,
- /* legacy mode = */ 1);
+ /* callback = */ config_query_callback);
else if (0 == strcasecmp (c->key, "Database"))
c_psql_config_database (c);
else
void module_register (void)
{
plugin_register_complex_config ("postgresql", c_psql_config);
- plugin_register_init ("postgresql", c_psql_init);
+ plugin_register_shutdown ("postgresql", c_psql_shutdown);
} /* module_register */
/* vim: set sw=4 ts=4 tw=78 noexpandtab : */
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