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, $v) {
126 if (is_object($cls) || is_object($j) || is_object($v)) {
127 $e = new Exception();
128 common_log(LOG_ERR, __METHOD__ . ' object in param: ' .
129 str_replace("\n", " ", $e->getTraceAsString()));
131 return common_cache_key(strtolower($cls).':'.$k.':'.$v);
134 static function getcached($cls, $k, $v) {
135 $c = Memcached_DataObject::memcache();
139 return $c->get(Memcached_DataObject::cacheKey($cls, $k, $v));
145 global $_DB_DATAOBJECT;
146 if (!isset($_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"])) {
147 $this->databaseStructure();
150 return $_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"];
155 $c = $this->memcache();
161 $types = $this->keyTypes();
163 foreach ($types as $key => $type) {
166 $pval[] = $this->$key;
168 $c->set($this->cacheKey($this->tableName(), $key, $this->$key), $this);
171 # XXX: should work for both compound and scalar pkeys
172 $pvals = implode(',', $pval);
173 $pkeys = implode(',', $pkey);
174 $c->set($this->cacheKey($this->tableName(), $pkeys, $pvals), $this);
180 $c = $this->memcache();
186 $types = $this->keyTypes();
188 foreach ($types as $key => $type) {
191 $pval[] = $this->$key;
193 $c->delete($this->cacheKey($this->tableName(), $key, $this->$key));
196 # should work for both compound and scalar pkeys
197 # XXX: comma works for now but may not be safe separator for future keys
198 $pvals = implode(',', $pval);
199 $pkeys = implode(',', $pkey);
200 $c->delete($this->cacheKey($this->tableName(), $pkeys, $pvals));
204 function multicache($cls, $kv)
207 $c = Memcached_DataObject::memcache();
211 $pkeys = implode(',', array_keys($kv));
212 $pvals = implode(',', array_values($kv));
213 return $c->get(Memcached_DataObject::cacheKey($cls, $pkeys, $pvals));
217 function getSearchEngine($table)
219 require_once INSTALLDIR.'/lib/search_engines.php';
220 static $search_engine;
221 if (!isset($search_engine)) {
222 if (Event::handle('GetSearchEngine', array($this, $table, &$search_engine))) {
223 if ('mysql' === common_config('db', 'type')) {
224 $type = common_config('search', 'type');
225 if ($type == 'like') {
226 $search_engine = new MySQLLikeSearch($this, $table);
227 } else if ($type == 'fulltext') {
228 $search_engine = new MySQLSearch($this, $table);
230 throw new ServerException('Unknown search type: ' . $type);
233 $search_engine = new PGSearch($this, $table);
237 return $search_engine;
240 static function cachedQuery($cls, $qry, $expiry=3600)
242 $c = Memcached_DataObject::memcache();
248 $key_part = common_keyize($cls).':'.md5($qry);
249 $ckey = common_cache_key($key_part);
250 $stored = $c->get($ckey);
252 return new ArrayWrapper($stored);
258 while ($inst->fetch()) {
259 $cached[] = clone($inst);
262 $c->set($ckey, $cached, MEMCACHE_COMPRESSED, $expiry);
263 return new ArrayWrapper($cached);
266 // We overload so that 'SET NAMES "utf8"' is called for
271 global $_DB_DATAOBJECT;
273 $sum = $this->_getDbDsnMD5();
275 if (!empty($_DB_DATAOBJECT['CONNECTIONS'][$sum]) &&
276 !PEAR::isError($_DB_DATAOBJECT['CONNECTIONS'][$sum])) {
282 $result = parent::_connect();
284 if ($result && !$exists) {
285 $DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
286 if (common_config('db', 'type') == 'mysql' &&
287 common_config('db', 'utf8')) {
288 $conn = $DB->connection;
290 if ($DB instanceof DB_mysqli) {
291 mysqli_set_charset($conn, 'utf8');
292 } else if ($DB instanceof DB_mysql) {
293 mysql_set_charset('utf8', $conn);
302 // XXX: largely cadged from DB_DataObject
304 function _getDbDsnMD5()
306 if ($this->_database_dsn_md5) {
307 return $this->_database_dsn_md5;
310 $dsn = $this->_getDbDsn();
312 if (is_string($dsn)) {
315 /// support array based dsn's
316 $sum = md5(serialize($dsn));
324 global $_DB_DATAOBJECT;
326 if (empty($_DB_DATAOBJECT['CONFIG'])) {
327 DB_DataObject::_loadConfig();
330 $options = &$_DB_DATAOBJECT['CONFIG'];
332 // if the databse dsn dis defined in the object..
334 $dsn = isset($this->_database_dsn) ? $this->_database_dsn : null;
338 if (!$this->_database) {
339 $this->_database = isset($options["table_{$this->__table}"]) ? $options["table_{$this->__table}"] : null;
342 if ($this->_database && !empty($options["database_{$this->_database}"])) {
343 $dsn = $options["database_{$this->_database}"];
344 } else if (!empty($options['database'])) {
345 $dsn = $options['database'];
350 throw new Exception("No database name / dsn found anywhere");