3 use Wikimedia\Rdbms\IDatabase
;
6 * Deferrable Update for closure/callback updates that should use auto-commit mode
9 class AutoCommitUpdate
implements DeferrableUpdate
, DeferrableCallback
{
14 /** @var callable|null */
18 * @param IDatabase $dbw DB handle; update aborts if a transaction now this rolls back
19 * @param string $fname Caller name (usually __METHOD__)
20 * @param callable $callback Callback that takes (IDatabase, method name string)
21 * @param IDatabase[] $conns Cancel the update if a transaction on these
22 * connections is rolled back [optional]
24 public function __construct( IDatabase
$dbw, $fname, callable
$callback, array $conns = [] ) {
26 $this->fname
= $fname;
27 $this->callback
= $callback;
28 // Register DB connections for which uncommitted changes are related to this update
30 foreach ( $conns as $conn ) {
31 if ( $conn->trxLevel() ) {
32 $conn->onTransactionResolution( [ $this, 'cancelOnRollback' ], $fname );
37 public function doUpdate() {
38 if ( !$this->callback
) {
42 $autoTrx = $this->dbw
->getFlag( DBO_TRX
);
43 $this->dbw
->clearFlag( DBO_TRX
);
45 ( $this->callback
)( $this->dbw
, $this->fname
);
48 $this->dbw
->setFlag( DBO_TRX
);
54 * @internal This method is public so that it works with onTransactionResolution()
57 public function cancelOnRollback( $trigger ) {
58 if ( $trigger === IDatabase
::TRIGGER_ROLLBACK
) {
59 $this->callback
= null;
63 public function getOrigin() {