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/*
* $Id$
*
* BDB Database Driver for SER
*
* Copyright (C) 2008 iptelorg GmbH
*
* This file is part of SIP-router, a free SIP server.
*
* SIP-router 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; either version 2 of the License, or (at your option) any later
* version.
*
* SIP-router 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.
*
* 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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/** \addtogroup bdb
* @{
*/
/*! \file
* Functions related to connections to BDB.
*
* \ingroup database
*/
#include <stdlib.h>
#include <string.h>
#include "../../mem/mem.h"
#include "../../dprint.h"
#include "../../ut.h"
#include "bdb_con.h"
#include "bdb_uri.h"
#include "bdb_lib.h"
/** Free all memory allocated for a bdb_con structure.
* This function function frees all memory that is in use by
* a bdb_con structure.
* @param con A generic db_con connection structure.
* @param payload BDB specific payload to be freed.
*/
static void bdb_con_free(db_con_t* con, bdb_con_t *payload)
{
bdb_uri_t *buri;
if (!payload)
return;
buri = DB_GET_PAYLOAD(con->uri);
/* Delete the structure only if there are no more references
* to it in the connection pool
*/
if (db_pool_remove((db_pool_entry_t*)payload) == 0) return;
db_pool_entry_free(&payload->gen);
/* destroy and free BDB env */
pkg_free(payload);
}
int bdb_con(db_con_t* con)
{
bdb_con_t* bcon;
bdb_uri_t* buri;
buri = DB_GET_PAYLOAD(con->uri);
/* First try to lookup the connection in the connection pool and
* re-use it if a match is found
*/
bcon = (bdb_con_t*)db_pool_get(con->uri);
if (bcon) {
DBG("bdb: Connection to %s found in connection pool\n",
buri->uri);
goto found;
}
bcon = (bdb_con_t*)pkg_malloc(sizeof(bdb_con_t));
if (!bcon) {
ERR("bdb: No memory left\n");
goto error;
}
memset(bcon, '\0', sizeof(bdb_con_t));
if (db_pool_entry_init(&bcon->gen, bdb_con_free, con->uri) < 0) goto error;
DBG("bdb: Preparing new connection to %s\n", buri->uri);
if(bdb_is_database(buri->path.s)!=0)
{
ERR("bdb: database [%.*s] does not exists!\n",
buri->path.len, buri->path.s);
goto error;
}
/* Put the newly created BDB connection into the pool */
db_pool_put((struct db_pool_entry*)bcon);
DBG("bdb: Connection stored in connection pool\n");
found:
/* Attach driver payload to the db_con structure and set connect and
* disconnect functions
*/
DB_SET_PAYLOAD(con, bcon);
con->connect = bdb_con_connect;
con->disconnect = bdb_con_disconnect;
return 0;
error:
if (bcon) {
db_pool_entry_free(&bcon->gen);
pkg_free(bcon);
}
return -1;
}
int bdb_con_connect(db_con_t* con)
{
bdb_con_t *bcon;
bdb_uri_t *buri;
bcon = DB_GET_PAYLOAD(con);
buri = DB_GET_PAYLOAD(con->uri);
/* Do not reconnect already connected connections */
if (bcon->flags & BDB_CONNECTED) return 0;
DBG("bdb: Connecting to %s\n", buri->uri);
/* create BDB environment */
bcon->dbp = bdblib_get_db(&buri->path);
if(bcon->dbp == NULL)
{
ERR("bdb: error binding to DB %s\n", buri->uri);
return -1;
}
DBG("bdb: Successfully bound to %s\n", buri->uri);
bcon->flags |= BDB_CONNECTED;
return 0;
}
void bdb_con_disconnect(db_con_t* con)
{
bdb_con_t *bcon;
bdb_uri_t *buri;
bcon = DB_GET_PAYLOAD(con);
buri = DB_GET_PAYLOAD(con->uri);
if ((bcon->flags & BDB_CONNECTED) == 0) return;
DBG("bdb: Unbinding from %s\n", buri->uri);
if(bcon->dbp==NULL)
{
bcon->flags &= ~BDB_CONNECTED;
return;
}
bdblib_close(bcon->dbp, &buri->path);
bcon->dbp = 0;
bcon->flags &= ~BDB_CONNECTED;
}
/** @} */
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