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<?php
use Wikimedia\Rdbms\IDatabase;
/**
* Deferrable Update for closure/callback
*/
class MWCallableUpdate
implements DeferrableUpdate, DeferrableCallback, TransactionRoundAwareUpdate
{
/** @var callable|null Callback, or null if it was cancelled */
private $callback;
/** @var string Calling method name */
private $fname;
/** @var int One of the class TRX_ROUND_* constants */
private $trxRoundRequirement = self::TRX_ROUND_PRESENT;
/**
* @param callable $callback
* @param string $fname Calling method
* @param IDatabase|IDatabase[]|null $dbws Abort if any of the specified DB handles have
* a currently pending transaction which later gets rolled back [optional] (since 1.28)
*/
public function __construct( callable $callback, $fname = 'unknown', $dbws = [] ) {
$this->callback = $callback;
$this->fname = $fname;
$dbws = is_array( $dbws ) ? $dbws : [ $dbws ];
foreach ( $dbws as $dbw ) {
if ( $dbw && $dbw->trxLevel() ) {
$dbw->onTransactionResolution( [ $this, 'cancelOnRollback' ], $fname );
}
}
}
public function doUpdate() {
if ( $this->callback ) {
call_user_func( $this->callback );
}
}
/**
* @internal This method is public so that it works with onTransactionResolution()
* @param int $trigger
*/
public function cancelOnRollback( $trigger ) {
if ( $trigger === IDatabase::TRIGGER_ROLLBACK ) {
$this->callback = null;
}
}
public function getOrigin() {
return $this->fname;
}
/**
* @since 1.34
* @param int $mode One of the class TRX_ROUND_* constants
*/
public function setTransactionRoundRequirement( $mode ) {
$this->trxRoundRequirement = $mode;
}
public function getTransactionRoundRequirement() {
return $this->trxRoundRequirement;
}
}
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