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 class Memcached_DataObject extends Safe_DataObject
25 * Wrapper for DB_DataObject's static lookup using memcached
26 * as backing instead of an in-process cache array.
28 * @param string $cls classname of object type to load
29 * @param mixed $k key field name, or value for primary key
30 * @param mixed $v key field value, or leave out for primary key lookup
31 * @return mixed Memcached_DataObject subtype or false
33 function &staticGet($cls, $k, $v=null)
43 $i = Memcached_DataObject::getcached($cls, $k, $v);
44 if ($i === false) { // false == cache miss
45 $i = DB_DataObject::factory($cls);
50 $result = $i->get($k, $v);
55 // save the fact that no such row exists
56 $c = self::memcache();
58 $ck = self::cachekey($cls, $k, $v);
68 * @fixme Should this return false on lookup fail to match staticGet?
70 function pkeyGet($cls, $kv)
72 $i = Memcached_DataObject::multicache($cls, $kv);
73 if ($i !== false) { // false == cache miss
76 $i = DB_DataObject::factory($cls);
77 if (empty($i) || PEAR::isError($i)) {
80 foreach ($kv as $k => $v) {
82 // XXX: possible SQL injection...? Don't
83 // pass keys from the browser, eh.
84 $i->whereAdd("$k is null");
93 $c = self::memcache();
95 $ck = self::multicacheKey($cls, $kv);
105 $result = parent::insert();
107 $this->fixupTimestamps();
108 $this->encache(); // in case of cached negative lookups
113 function update($orig=null)
115 if (is_object($orig) && $orig instanceof Memcached_DataObject) {
116 $orig->decache(); # might be different keys
118 $result = parent::update($orig);
120 $this->fixupTimestamps();
128 $this->decache(); # while we still have the values!
129 return parent::delete();
132 static function memcache() {
133 return Cache::instance();
136 static function cacheKey($cls, $k, $v) {
137 if (is_object($cls) || is_object($k) || (is_object($v) && !($v instanceof DB_DataObject_Cast))) {
138 $e = new Exception();
139 common_log(LOG_ERR, __METHOD__ . ' object in param: ' .
140 str_replace("\n", " ", $e->getTraceAsString()));
142 $vstr = self::valueString($v);
143 return Cache::key(strtolower($cls).':'.$k.':'.$vstr);
146 static function getcached($cls, $k, $v) {
147 $c = Memcached_DataObject::memcache();
151 $obj = $c->get(Memcached_DataObject::cacheKey($cls, $k, $v));
152 if (0 == strcasecmp($cls, 'User')) {
153 // Special case for User
154 if (is_object($obj) && is_object($obj->id)) {
155 common_log(LOG_ERR, "User " . $obj->nickname . " was cached with User as ID; deleting");
156 $c->delete(Memcached_DataObject::cacheKey($cls, $k, $v));
166 // ini-based classes return number-indexed arrays. handbuilt
167 // classes return column => keytype. Make this uniform.
169 $keys = $this->keys();
171 $keyskeys = array_keys($keys);
173 if (is_string($keyskeys[0])) {
177 global $_DB_DATAOBJECT;
178 if (!isset($_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"])) {
179 $this->databaseStructure();
182 return $_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"];
187 $c = $this->memcache();
191 } else if ($this->tableName() == 'user' && is_object($this->id)) {
192 // Special case for User bug
193 $e = new Exception();
194 common_log(LOG_ERR, __METHOD__ . ' caching user with User object as ID ' .
195 str_replace("\n", " ", $e->getTraceAsString()));
198 $keys = $this->_allCacheKeys();
200 foreach ($keys as $key) {
201 $c->set($key, $this);
208 $c = $this->memcache();
214 $keys = $this->_allCacheKeys();
216 foreach ($keys as $key) {
217 $c->delete($key, $this);
221 function _allCacheKeys()
225 $types = $this->keyTypes();
231 foreach ($types as $key => $type) {
233 assert(!empty($key));
236 if (empty($this->$key)) {
239 $ckeys[] = $this->cacheKey($this->tableName(), $key, self::valueString($this->$key));
240 } else if ($type == 'K' || $type == 'N') {
242 $pval[] = self::valueString($this->$key);
244 // Low level exception. No need for i18n as discussed with Brion.
245 throw new Exception("Unknown key type $key => $type for " . $this->tableName());
249 assert(count($pkey) > 0);
251 // XXX: should work for both compound and scalar pkeys
252 $pvals = implode(',', $pval);
253 $pkeys = implode(',', $pkey);
255 $ckeys[] = $this->cacheKey($this->tableName(), $pkeys, $pvals);
260 function multicache($cls, $kv)
263 $c = self::memcache();
267 return $c->get(self::multicacheKey($cls, $kv));
271 static function multicacheKey($cls, $kv)
274 $pkeys = implode(',', array_keys($kv));
275 $pvals = implode(',', array_values($kv));
276 return self::cacheKey($cls, $pkeys, $pvals);
279 function getSearchEngine($table)
281 require_once INSTALLDIR.'/lib/search_engines.php';
283 if (Event::handle('GetSearchEngine', array($this, $table, &$search_engine))) {
284 if ('mysql' === common_config('db', 'type')) {
285 $type = common_config('search', 'type');
286 if ($type == 'like') {
287 $search_engine = new MySQLLikeSearch($this, $table);
288 } else if ($type == 'fulltext') {
289 $search_engine = new MySQLSearch($this, $table);
291 // Low level exception. No need for i18n as discussed with Brion.
292 throw new ServerException('Unknown search type: ' . $type);
295 $search_engine = new PGSearch($this, $table);
299 return $search_engine;
302 static function cachedQuery($cls, $qry, $expiry=3600)
304 $c = Memcached_DataObject::memcache();
310 $key_part = Cache::keyize($cls).':'.md5($qry);
311 $ckey = Cache::key($key_part);
312 $stored = $c->get($ckey);
314 if ($stored !== false) {
315 return new ArrayWrapper($stored);
321 while ($inst->fetch()) {
322 $cached[] = clone($inst);
325 $c->set($ckey, $cached, Cache::COMPRESSED, $expiry);
326 return new ArrayWrapper($cached);
330 * sends query to database - this is the private one that must work
331 * - internal functions use this rather than $this->query()
333 * Overridden to do logging.
335 * @param string $string
337 * @return mixed none or PEAR_Error
339 function _query($string)
341 if (common_config('db', 'annotate_queries')) {
342 $string = $this->annotateQuery($string);
345 $start = microtime(true);
348 if (Event::handle('StartDBQuery', array($this, $string, &$result))) {
349 common_perf_counter('query', $string);
351 $result = parent::_query($string);
352 } catch (Exception $e) {
355 Event::handle('EndDBQuery', array($this, $string, &$result));
357 $delta = microtime(true) - $start;
359 $limit = common_config('db', 'log_slow_queries');
360 if (($limit > 0 && $delta >= $limit) || common_config('db', 'log_queries')) {
361 $clean = $this->sanitizeQuery($string);
363 $msg = sprintf("FAILED DB query (%0.3fs): %s - %s", $delta, $fail->getMessage(), $clean);
365 $msg = sprintf("DB query (%0.3fs): %s", $delta, $clean);
367 common_log(LOG_DEBUG, $msg);
377 * Find the first caller in the stack trace that's not a
378 * low-level database function and add a comment to the
379 * query string. This should then be visible in process lists
380 * and slow query logs, to help identify problem areas.
382 * Also marks whether this was a web GET/POST or which daemon
385 * @param string $string SQL query string
386 * @return string SQL query string, with a comment in it
388 function annotateQuery($string)
390 $ignore = array('annotateQuery',
398 $ignoreStatic = array('staticGet',
401 $here = get_class($this); // if we get confused
402 $bt = debug_backtrace();
404 // Find the first caller that's not us?
405 foreach ($bt as $frame) {
406 $func = $frame['function'];
407 if (isset($frame['type']) && $frame['type'] == '::') {
408 if (in_array($func, $ignoreStatic)) {
411 $here = $frame['class'] . '::' . $func;
413 } else if (isset($frame['type']) && $frame['type'] == '->') {
414 if ($frame['object'] === $this && in_array($func, $ignore)) {
417 if (in_array($func, $ignoreStatic)) {
418 continue; // @fixme this shouldn't be needed?
420 $here = get_class($frame['object']) . '->' . $func;
427 if (php_sapi_name() == 'cli') {
428 $context = basename($_SERVER['PHP_SELF']);
430 $context = $_SERVER['REQUEST_METHOD'];
433 // Slip the comment in after the first command,
434 // or DB_DataObject gets confused about handling inserts and such.
435 $parts = explode(' ', $string, 2);
436 $parts[0] .= " /* $context $here */";
437 return implode(' ', $parts);
440 // Sanitize a query for logging
441 // @fixme don't trim spaces in string literals
442 function sanitizeQuery($string)
444 $string = preg_replace('/\s+/', ' ', $string);
445 $string = trim($string);
449 // We overload so that 'SET NAMES "utf8"' is called for
454 global $_DB_DATAOBJECT;
456 $sum = $this->_getDbDsnMD5();
458 if (!empty($_DB_DATAOBJECT['CONNECTIONS'][$sum]) &&
459 !PEAR::isError($_DB_DATAOBJECT['CONNECTIONS'][$sum])) {
465 // @fixme horrible evil hack!
467 // In multisite configuration we don't want to keep around a separate
468 // connection for every database; we could end up with thousands of
469 // connections open per thread. In an ideal world we might keep
470 // a connection per server and select different databases, but that'd
471 // be reliant on having the same db username/pass as well.
473 // MySQL connections are cheap enough we're going to try just
474 // closing out the old connection and reopening when we encounter
477 // WARNING WARNING if we end up actually using multiple DBs at a time
478 // we'll need some fancier logic here.
479 if (!$exists && !empty($_DB_DATAOBJECT['CONNECTIONS']) && php_sapi_name() == 'cli') {
480 foreach ($_DB_DATAOBJECT['CONNECTIONS'] as $index => $conn) {
484 unset($_DB_DATAOBJECT['CONNECTIONS'][$index]);
488 $result = parent::_connect();
490 if ($result && !$exists) {
491 $DB = &$_DB_DATAOBJECT['CONNECTIONS'][$this->_database_dsn_md5];
492 if (common_config('db', 'type') == 'mysql' &&
493 common_config('db', 'utf8')) {
494 $conn = $DB->connection;
496 if ($DB instanceof DB_mysqli) {
497 mysqli_set_charset($conn, 'utf8');
498 } else if ($DB instanceof DB_mysql) {
499 mysql_set_charset('utf8', $conn);
503 // Needed to make timestamp values usefully comparable.
504 if (common_config('db', 'type') == 'mysql') {
505 parent::_query("set time_zone='+0:00'");
512 // XXX: largely cadged from DB_DataObject
514 function _getDbDsnMD5()
516 if ($this->_database_dsn_md5) {
517 return $this->_database_dsn_md5;
520 $dsn = $this->_getDbDsn();
522 if (is_string($dsn)) {
525 /// support array based dsn's
526 $sum = md5(serialize($dsn));
534 global $_DB_DATAOBJECT;
536 if (empty($_DB_DATAOBJECT['CONFIG'])) {
537 DB_DataObject::_loadConfig();
540 $options = &$_DB_DATAOBJECT['CONFIG'];
542 // if the databse dsn dis defined in the object..
544 $dsn = isset($this->_database_dsn) ? $this->_database_dsn : null;
548 if (!$this->_database) {
549 $this->_database = isset($options["table_{$this->__table}"]) ? $options["table_{$this->__table}"] : null;
552 if ($this->_database && !empty($options["database_{$this->_database}"])) {
553 $dsn = $options["database_{$this->_database}"];
554 } else if (!empty($options['database'])) {
555 $dsn = $options['database'];
560 // TRANS: Exception thrown when database name or Data Source Name could not be found.
561 throw new Exception(_("No database name or DSN found anywhere."));
567 static function blow()
569 $c = self::memcache();
575 $args = func_get_args();
577 $format = array_shift($args);
579 $keyPart = vsprintf($format, $args);
581 $cacheKey = Cache::key($keyPart);
583 return $c->delete($cacheKey);
586 function fixupTimestamps()
588 // Fake up timestamp columns
589 $columns = $this->table();
590 foreach ($columns as $name => $type) {
591 if ($type & DB_DATAOBJECT_MYSQLTIMESTAMP) {
592 $this->$name = common_sql_now();
599 common_debug("debugDump: " . common_log_objstring($this));
602 function raiseError($message, $type = null, $behaviour = null)
604 $id = get_class($this);
605 if (!empty($this->id)) {
606 $id .= ':' . $this->id;
608 if ($message instanceof PEAR_Error) {
609 $message = $message->getMessage();
611 // Low level exception. No need for i18n as discussed with Brion.
612 throw new ServerException("[$id] DB_DataObject error [$type]: $message");
615 static function cacheGet($keyPart)
617 $c = self::memcache();
623 $cacheKey = Cache::key($keyPart);
625 return $c->get($cacheKey);
628 static function cacheSet($keyPart, $value, $flag=null, $expiry=null)
630 $c = self::memcache();
636 $cacheKey = Cache::key($keyPart);
638 return $c->set($cacheKey, $value, $flag, $expiry);
641 static function valueString($v)
644 if (is_object($v) && $v instanceof DB_DataObject_Cast) {
647 $vstr = $v->year . '-' . $v->month . '-' . $v->day;
654 // Low level exception. No need for i18n as discussed with Brion.
655 throw new ServerException("Unhandled DB_DataObject_Cast type passed as cacheKey value: '$v->type'");
658 // Low level exception. No need for i18n as discussed with Brion.
659 throw new ServerException("Unknown DB_DataObject_Cast type passed as cacheKey value: '$v->type'");