X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;ds=sidebyside;f=classes%2FMemcached_DataObject.php;h=ab65c30ce28579a8684b4e9fa8d9cc8124d2b833;hb=bb16898b1c73073e0442de72f2af133a3bd39713;hp=a77e43d38ce4e12635406c82c03abe0d02f661fd;hpb=3f3d6905deb1f292d9f0c5aacb67b98bdfa100c5;p=quix0rs-gnu-social.git diff --git a/classes/Memcached_DataObject.php b/classes/Memcached_DataObject.php index a77e43d38c..ab65c30ce2 100644 --- a/classes/Memcached_DataObject.php +++ b/classes/Memcached_DataObject.php @@ -21,7 +21,7 @@ if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); } class Memcached_DataObject extends DB_DataObject { - /** + /** * Destructor to free global memory resources associated with * this data object when it's unset or goes out of scope. * DB_DataObject doesn't do this yet by itself. @@ -35,6 +35,41 @@ class Memcached_DataObject extends DB_DataObject } } + /** + * Magic function called at serialize() time. + * + * We use this to drop a couple process-specific references + * from DB_DataObject which can cause trouble in future + * processes. + * + * @return array of variable names to include in serialization. + */ + function __sleep() + { + $vars = array_keys(get_object_vars($this)); + $skip = array('_DB_resultid', '_link_loaded'); + return array_diff($vars, $skip); + } + + /** + * Magic function called at unserialize() time. + * + * Clean out some process-specific variables which might + * be floating around from a previous process's cached + * objects. + * + * Old cached objects may still have them. + */ + function __wakeup() + { + // Refers to global state info from a previous process. + // Clear this out so we don't accidentally break global + // state in *this* process. + $this->_DB_resultid = null; + // We don't have any local DBO refs, so clear these out. + $this->_link_loaded = false; + } + /** * Wrapper for DB_DataObject's static lookup using memcached * as backing instead of an in-process cache array. @@ -55,17 +90,16 @@ class Memcached_DataObject extends DB_DataObject unset($i); } $i = Memcached_DataObject::getcached($cls, $k, $v); - if ($i !== false) { // false == cache miss - return $i; - } else { + if ($i === false) { // false == cache miss $i = DB_DataObject::factory($cls); if (empty($i)) { - return false; + $i = false; + return $i; } $result = $i->get($k, $v); if ($result) { + // Hit! $i->encache(); - return $i; } else { // save the fact that no such row exists $c = self::memcache(); @@ -73,12 +107,16 @@ class Memcached_DataObject extends DB_DataObject $ck = self::cachekey($cls, $k, $v); $c->set($ck, null); } - return false; + $i = false; } } + return $i; } - function &pkeyGet($cls, $kv) + /** + * @fixme Should this return false on lookup fail to match staticGet? + */ + function pkeyGet($cls, $kv) { $i = Memcached_DataObject::multicache($cls, $kv); if ($i !== false) { // false == cache miss @@ -108,6 +146,10 @@ class Memcached_DataObject extends DB_DataObject function insert() { $result = parent::insert(); + if ($result) { + $this->fixupTimestamps(); + $this->encache(); // in case of cached negative lookups + } return $result; } @@ -118,6 +160,7 @@ class Memcached_DataObject extends DB_DataObject } $result = parent::update($orig); if ($result) { + $this->fixupTimestamps(); $this->encache(); } return $result; @@ -147,12 +190,32 @@ class Memcached_DataObject extends DB_DataObject if (!$c) { return false; } else { - return $c->get(Memcached_DataObject::cacheKey($cls, $k, $v)); + $obj = $c->get(Memcached_DataObject::cacheKey($cls, $k, $v)); + if (0 == strcasecmp($cls, 'User')) { + // Special case for User + if (is_object($obj) && is_object($obj->id)) { + common_log(LOG_ERR, "User " . $obj->nickname . " was cached with User as ID; deleting"); + $c->delete(Memcached_DataObject::cacheKey($cls, $k, $v)); + return false; + } + } + return $obj; } } function keyTypes() { + // ini-based classes return number-indexed arrays. handbuilt + // classes return column => keytype. Make this uniform. + + $keys = $this->keys(); + + $keyskeys = array_keys($keys); + + if (is_string($keyskeys[0])) { + return $keys; + } + global $_DB_DATAOBJECT; if (!isset($_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"])) { $this->databaseStructure(); @@ -167,12 +230,18 @@ class Memcached_DataObject extends DB_DataObject if (!$c) { return false; - } - - $keys = $this->_allCacheKeys(); + } else if ($this->tableName() == 'user' && is_object($this->id)) { + // Special case for User bug + $e = new Exception(); + common_log(LOG_ERR, __METHOD__ . ' caching user with User object as ID ' . + str_replace("\n", " ", $e->getTraceAsString())); + return false; + } else { + $keys = $this->_allCacheKeys(); - foreach ($keys as $key) { - $c->set($key, $this); + foreach ($keys as $key) { + $c->set($key, $this); + } } } @@ -298,6 +367,39 @@ class Memcached_DataObject extends DB_DataObject return new ArrayWrapper($cached); } + /** + * sends query to database - this is the private one that must work + * - internal functions use this rather than $this->query() + * + * Overridden to do logging. + * + * @param string $string + * @access private + * @return mixed none or PEAR_Error + */ + function _query($string) + { + $start = microtime(true); + $result = parent::_query($string); + $delta = microtime(true) - $start; + + $limit = common_config('db', 'log_slow_queries'); + if (($limit > 0 && $delta >= $limit) || common_config('db', 'log_queries')) { + $clean = $this->sanitizeQuery($string); + common_log(LOG_DEBUG, sprintf("DB query (%0.3fs): %s", $delta, $clean)); + } + return $result; + } + + // Sanitize a query for logging + // @fixme don't trim spaces in string literals + function sanitizeQuery($string) + { + $string = preg_replace('/\s+/', ' ', $string); + $string = trim($string); + return $string; + } + // We overload so that 'SET NAMES "utf8"' is called for // each connection @@ -314,6 +416,29 @@ class Memcached_DataObject extends DB_DataObject $exists = false; } + // @fixme horrible evil hack! + // + // In multisite configuration we don't want to keep around a separate + // connection for every database; we could end up with thousands of + // connections open per thread. In an ideal world we might keep + // a connection per server and select different databases, but that'd + // be reliant on having the same db username/pass as well. + // + // MySQL connections are cheap enough we're going to try just + // closing out the old connection and reopening when we encounter + // a new DSN. + // + // WARNING WARNING if we end up actually using multiple DBs at a time + // we'll need some fancier logic here. + if (!$exists && !empty($_DB_DATAOBJECT['CONNECTIONS']) && php_sapi_name() == 'cli') { + foreach ($_DB_DATAOBJECT['CONNECTIONS'] as $index => $conn) { + if (!empty($conn)) { + $conn->disconnect(); + } + unset($_DB_DATAOBJECT['CONNECTIONS'][$index]); + } + } + $result = parent::_connect(); if ($result && !$exists) { @@ -387,4 +512,70 @@ class Memcached_DataObject extends DB_DataObject return $dsn; } + + static function blow() + { + $c = self::memcache(); + + if (empty($c)) { + return false; + } + + $args = func_get_args(); + + $format = array_shift($args); + + $keyPart = vsprintf($format, $args); + + $cacheKey = common_cache_key($keyPart); + + return $c->delete($cacheKey); + } + + function fixupTimestamps() + { + // Fake up timestamp columns + $columns = $this->table(); + foreach ($columns as $name => $type) { + if ($type & DB_DATAOBJECT_MYSQLTIMESTAMP) { + $this->$name = common_sql_now(); + } + } + } + + function debugDump() + { + common_debug("debugDump: " . common_log_objstring($this)); + } + + function raiseError($message, $type = null, $behaviour = null) + { + throw new ServerException("DB_DataObject error [$type]: $message"); + } + + static function cacheGet($keyPart) + { + $c = self::memcache(); + + if (empty($c)) { + return false; + } + + $cacheKey = common_cache_key($keyPart); + + return $c->get($cacheKey); + } + + static function cacheSet($keyPart, $value) + { + $c = self::memcache(); + + if (empty($c)) { + return false; + } + + $cacheKey = common_cache_key($keyPart); + + return $c->set($cacheKey, $value); + } }