/** * Initializes metadata. * * If metadata cannot be loaded from cache, adapter's describeTable() method is called to discover metadata * information. Returns true if and only if the metadata are loaded from cache. * * @return boolean * @throws \Zend\DB\Table\Exception */ protected function _setupMetadata() { if ($this->metadataCacheInClass() && count($this->_metadata) > 0) { return true; } // Assume that metadata will be loaded from cache $isMetadataFromCache = true; // If $this has no metadata cache but the class has a default metadata cache if (null === $this->_metadataCache && null !== self::$_defaultMetadataCache) { // Make $this use the default metadata cache of the class $this->_setMetadataCache(self::$_defaultMetadataCache); } // If $this has a metadata cache if (null !== $this->_metadataCache) { // Define the cache identifier where the metadata are saved //get db configuration $dbConfig = $this->_db->getConfig(); // Define the cache identifier where the metadata are saved $cacheId = md5((isset($dbConfig['options']['port']) ? ':' . $dbConfig['options']['port'] : null) . (isset($dbConfig['options']['host']) ? ':' . $dbConfig['options']['host'] : null) . '/' . $dbConfig['dbname'] . ':' . $this->_schema . '.' . $this->_name); } // If $this has no metadata cache or metadata cache misses if (null === $this->_metadataCache || !($metadata = $this->_metadataCache->load($cacheId))) { // Metadata are not loaded from cache $isMetadataFromCache = false; // Fetch metadata from the adapter's describeTable() method $metadata = $this->_db->describeTable($this->_name, $this->_schema); // If $this has a metadata cache, then cache the metadata if (null !== $this->_metadataCache && !$this->_metadataCache->save($metadata, $cacheId)) { trigger_error('Failed saving metadata to metadataCache', E_USER_NOTICE); } } // Assign the metadata to $this $this->_metadata = $metadata; // Return whether the metadata were loaded from cache return $isMetadataFromCache; }
/** * Define the cache identifier where the metadata are saved * * @return string */ protected function _cacheId() { //get db configuration $dbConfig = $this->_db->getConfig(); $cacheId = md5((isset($dbConfig['options']['port']) ? ':' . $dbConfig['options']['port'] : null) . (isset($dbConfig['options']['host']) ? ':' . $dbConfig['options']['host'] : null) . '/' . $dbConfig['dbname'] . ':' . $this->_schema . '.' . $this->_name); return $cacheId; }