* Deferrable Update for closure/callback
*/
class MWCallableUpdate implements DeferrableUpdate, DeferrableCallback {
- /** @var callable */
+ /** @var callable|null */
private $callback;
/** @var string */
private $fname;
/**
* @param callable $callback
* @param string $fname Calling method
+ * @param IDatabase|null $dbw Abort if this DB is rolled back [optional] (since 1.28)
*/
- public function __construct( callable $callback, $fname = 'unknown' ) {
+ public function __construct( callable $callback, $fname = 'unknown', IDatabase $dbw = null ) {
$this->callback = $callback;
$this->fname = $fname;
+
+ if ( $dbw && $dbw->trxLevel() ) {
+ $dbw->onTransactionResolution( [ $this, 'cancelOnRollback' ], $fname );
+ }
}
public function doUpdate() {
- call_user_func( $this->callback );
+ if ( $this->callback ) {
+ call_user_func( $this->callback );
+ }
+ }
+
+ public function cancelOnRollback( $trigger ) {
+ if ( $trigger === IDatabase::TRIGGER_ROLLBACK ) {
+ $this->callback = null;
+ }
}
public function getOrigin() {