PHP DatabaseBase::getLBInfo方法代码示例

 /**
  * Construct a database error
  * @param $db DatabaseBase object which threw the error
  * @param $error String A simple error message to be used for debugging
  */
 function __construct(DatabaseBase &$db, $error)
 {
     global $wgDBcluster;
     $this->db = $db;
     parent::__construct($error);
     $isMaster = !is_null($db->getLBInfo('master'));
     // Wikia change - @author macbre - MAIN-2304
     \Wikia\Logger\WikiaLogger::instance()->error('DBError', ['name' => $db->getDBname(), 'cluster' => $wgDBcluster, 'server' => $db->getServer(), 'server_role' => $isMaster ? 'master' : 'slave', 'errno' => $db->lastErrno(), 'err' => $db->lastError(), 'exception' => $this]);
 }

 /**
  * Mark a foreign connection as being available for reuse under a different
  * DB name or prefix. This mechanism is reference-counted, and must be called
  * the same number of times as getConnection() to work.
  *
  * @param DatabaseBase $conn
  * @throws MWException
  */
 public function reuseConnection($conn)
 {
     $serverIndex = $conn->getLBInfo('serverIndex');
     $refCount = $conn->getLBInfo('foreignPoolRefCount');
     if ($serverIndex === null || $refCount === null) {
         wfDebug(__METHOD__ . ": this connection was not opened as a foreign connection\n");
         /**
          * This can happen in code like:
          *   foreach ( $dbs as $db ) {
          *     $conn = $lb->getConnection( DB_SLAVE, array(), $db );
          *     ...
          *     $lb->reuseConnection( $conn );
          *   }
          * When a connection to the local DB is opened in this way, reuseConnection()
          * should be ignored
          */
         return;
     }
     $dbName = $conn->getDBname();
     $prefix = $conn->tablePrefix();
     if (strval($prefix) !== '') {
         $wiki = "{$dbName}-{$prefix}";
     } else {
         $wiki = $dbName;
     }
     if ($this->mConns['foreignUsed'][$serverIndex][$wiki] !== $conn) {
         throw new MWException(__METHOD__ . ": connection not found, has " . "the connection been freed already?");
     }
     $conn->setLBInfo('foreignPoolRefCount', --$refCount);
     if ($refCount <= 0) {
         $this->mConns['foreignFree'][$serverIndex][$wiki] = $conn;
         unset($this->mConns['foreignUsed'][$serverIndex][$wiki]);
         wfDebug(__METHOD__ . ": freed connection {$serverIndex}/{$wiki}\n");
     } else {
         wfDebug(__METHOD__ . ": reference count for {$serverIndex}/{$wiki} reduced to {$refCount}\n");
     }
 }

 /**
  * Get the 'blobs' table name for this database
  *
  * @param DatabaseBase $db
  * @return string Table name ('blobs' by default)
  */
 function getTable($db)
 {
     $table = $db->getLBInfo('blobs table');
     if (is_null($table)) {
         $table = 'blobs';
     }
     return $table;
 }