3 * StatusNet - the distributed open-source microblogging tool
4 * Copyright (C) 2008, 2009, StatusNet, Inc.
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU Affero General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Affero General Public License for more details.
16 * You should have received a copy of the GNU Affero General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
22 require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
24 class Memcached_DataObject extends DB_DataObject
27 * Destructor to free global memory resources associated with
28 * this data object when it's unset or goes out of scope.
29 * DB_DataObject doesn't do this yet by itself.
35 if (method_exists('DB_DataObject', '__destruct')) {
41 * Wrapper for DB_DataObject's static lookup using memcached
42 * as backing instead of an in-process cache array.
44 * @param string $cls classname of object type to load
45 * @param mixed $k key field name, or value for primary key
46 * @param mixed $v key field value, or leave out for primary key lookup
47 * @return mixed Memcached_DataObject subtype or false
49 function &staticGet($cls, $k, $v=null)
59 $i = Memcached_DataObject::getcached($cls, $k, $v);
63 $i = DB_DataObject::staticGet($cls, $k, $v);
65 // DB_DataObject's in-process lookup cache interferes with GC
66 // to cause massive memory leaks in long-running processes.
67 if (php_sapi_name() == 'cli') {
71 // Now store it into the shared memcached, if present...
78 function &pkeyGet($cls, $kv)
80 $i = Memcached_DataObject::multicache($cls, $kv);
85 foreach ($kv as $k => $v) {
99 $result = parent::insert();
103 function update($orig=null)
105 if (is_object($orig) && $orig instanceof Memcached_DataObject) {
106 $orig->decache(); # might be different keys
108 $result = parent::update($orig);
117 $this->decache(); # while we still have the values!
118 return parent::delete();
121 static function memcache() {
122 return common_memcache();
125 static function cacheKey($cls, $k, $v) {
126 return common_cache_key(strtolower($cls).':'.$k.':'.$v);
129 static function getcached($cls, $k, $v) {
130 $c = Memcached_DataObject::memcache();
134 return $c->get(Memcached_DataObject::cacheKey($cls, $k, $v));
140 global $_DB_DATAOBJECT;
141 if (!isset($_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"])) {
142 $this->databaseStructure();
145 return $_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"];
150 $c = $this->memcache();
156 $types = $this->keyTypes();
158 foreach ($types as $key => $type) {
161 $pval[] = $this->$key;
163 $c->set($this->cacheKey($this->tableName(), $key, $this->$key), $this);
166 # XXX: should work for both compound and scalar pkeys
167 $pvals = implode(',', $pval);
168 $pkeys = implode(',', $pkey);
169 $c->set($this->cacheKey($this->tableName(), $pkeys, $pvals), $this);
175 $c = $this->memcache();
181 $types = $this->keyTypes();
183 foreach ($types as $key => $type) {
186 $pval[] = $this->$key;
188 $c->delete($this->cacheKey($this->tableName(), $key, $this->$key));
191 # should work for both compound and scalar pkeys
192 # XXX: comma works for now but may not be safe separator for future keys
193 $pvals = implode(',', $pval);
194 $pkeys = implode(',', $pkey);
195 $c->delete($this->cacheKey($this->tableName(), $pkeys, $pvals));
199 function multicache($cls, $kv)
202 $c = Memcached_DataObject::memcache();
206 $pkeys = implode(',', array_keys($kv));
207 $pvals = implode(',', array_values($kv));
208 return $c->get(Memcached_DataObject::cacheKey($cls, $pkeys, $pvals));
212 function getSearchEngine($table)
214 require_once INSTALLDIR.'/lib/search_engines.php';
215 static $search_engine;
216 if (!isset($search_engine)) {
217 if (Event::handle('GetSearchEngine', array($this, $table, &$search_engine))) {
218 if ('mysql' === common_config('db', 'type')) {
219 $type = common_config('search', 'type');
220 if ($type == 'like') {
221 $search_engine = new MySQLLikeSearch($this, $table);
222 } else if ($type == 'fulltext') {
223 $search_engine = new MySQLSearch($this, $table);
225 throw new ServerException('Unknown search type: ' . $type);
228 $search_engine = new PGSearch($this, $table);
232 return $search_engine;
235 static function cachedQuery($cls, $qry, $expiry=3600)
237 $c = Memcached_DataObject::memcache();
243 $key_part = common_keyize($cls).':'.md5($qry);
244 $ckey = common_cache_key($key_part);
245 $stored = $c->get($ckey);
247 return new ArrayWrapper($stored);
253 while ($inst->fetch()) {
254 $cached[] = clone($inst);
257 $c->set($ckey, $cached, MEMCACHE_COMPRESSED, $expiry);
258 return new ArrayWrapper($cached);
261 // We overload so that 'SET NAMES "utf8"' is called for
266 global $_DB_DATAOBJECT;
268 $sum = $this->_getDbDsnMD5();
270 if (!empty($_DB_DATAOBJECT['CONNECTIONS'][$sum]) &&
271 !PEAR::isError($_DB_DATAOBJECT['CONNECTIONS'][$sum])) {
277 $result = parent::_connect();
279 if ($result && !$exists) {
280 $DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
281 if (common_config('db', 'type') == 'mysql' &&
282 common_config('db', 'utf8')) {
283 $conn = $DB->connection;
285 if ($DB instanceof DB_mysqli) {
286 mysqli_set_charset($conn, 'utf8');
287 } else if ($DB instanceof DB_mysql) {
288 mysql_set_charset('utf8', $conn);
297 // XXX: largely cadged from DB_DataObject
299 function _getDbDsnMD5()
301 if ($this->_database_dsn_md5) {
302 return $this->_database_dsn_md5;
305 $dsn = $this->_getDbDsn();
307 if (is_string($dsn)) {
310 /// support array based dsn's
311 $sum = md5(serialize($dsn));
319 global $_DB_DATAOBJECT;
321 if (empty($_DB_DATAOBJECT['CONFIG'])) {
322 DB_DataObject::_loadConfig();
325 $options = &$_DB_DATAOBJECT['CONFIG'];
327 // if the databse dsn dis defined in the object..
329 $dsn = isset($this->_database_dsn) ? $this->_database_dsn : null;
333 if (!$this->_database) {
334 $this->_database = isset($options["table_{$this->__table}"]) ? $options["table_{$this->__table}"] : null;
337 if ($this->_database && !empty($options["database_{$this->_database}"])) {
338 $dsn = $options["database_{$this->_database}"];
339 } else if (!empty($options['database'])) {
340 $dsn = $options['database'];
345 throw new Exception("No database name / dsn found anywhere");