+ /**
+ * Create the appropriate object to handle a specific job
+ *
+ * @param string $command Job command
+ * @param Title $title Associated title
+ * @param array $params Job parameters
+ * @param int $id Job identifier
+ * @return Job
+ */
+ static function factory( $command, $title, $params = false, $id = 0 ) {
+ global $wgJobClasses;
+ if( isset( $wgJobClasses[$command] ) ) {
+ $class = $wgJobClasses[$command];
+ return new $class( $title, $params, $id );
+ }
+ throw new MWException( "Invalid job command `{$command}`" );
+ }
+
+ static function makeBlob( $params ) {
+ if ( $params !== false ) {
+ return serialize( $params );
+ } else {
+ return '';
+ }
+ }
+
+ static function extractBlob( $blob ) {
+ if ( (string)$blob !== '' ) {
+ return unserialize( $blob );
+ } else {
+ return false;
+ }
+ }
+
+ /**
+ * Batch-insert a group of jobs into the queue.
+ * This will be wrapped in a transaction with a forced commit.
+ *
+ * This may add duplicate at insert time, but they will be
+ * removed later on, when the first one is popped.
+ *
+ * @param $jobs array of Job objects
+ */
+ static function batchInsert( $jobs ) {
+ if( count( $jobs ) ) {
+ $dbw = wfGetDB( DB_MASTER );
+ $dbw->begin();
+ foreach( $jobs as $job ) {
+ $rows[] = $job->insertFields();
+ }
+ $dbw->insert( 'job', $rows, __METHOD__, 'IGNORE' );
+ $dbw->commit();
+ }
+ }
+