/**
* 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;
}
