protected $mConn = null;
protected $mOpened = false;
- /** @var callable[] */
+ /** @var array[] List of (callable, method name) */
protected $mTrxIdleCallbacks = [];
- /** @var callable[] */
+ /** @var array[] List of (callable, method name) */
protected $mTrxPreCommitCallbacks = [];
+ /** @var array[] List of (callable, method name) */
+ protected $mTrxEndCallbacks = [];
+ /** @var bool Whether to suppress triggering of post-commit callbacks */
+ protected $suppressPostCommitCallbacks = false;
protected $mTablePrefix;
protected $mSchema;
}
public function close() {
- if ( count( $this->mTrxIdleCallbacks ) ) { // sanity
- throw new MWException( "Transaction idle callbacks still pending." );
- }
if ( $this->mConn ) {
if ( $this->trxLevel() ) {
if ( !$this->mTrxAutomatic ) {
$closed = $this->closeConnection();
$this->mConn = false;
+ } elseif ( $this->mTrxIdleCallbacks || $this->mTrxEndCallbacks ) { // sanity
+ throw new MWException( "Transaction callbacks still pending." );
} else {
$closed = true;
}
* queries. If a deadlock occurs during the processing, the transaction
* will be rolled back and the callback function will be called again.
*
+ * Avoid using this method outside of Job or Maintenance classes.
+ *
* Usage:
* $dbw->deadlockLoop( callback, ... );
*
* Extra arguments are passed through to the specified callback function.
+ * This method requires that no transactions are already active to avoid
+ * causing premature commits or exceptions.
*
* Returns whatever the callback function returned on its successful,
* iteration, or false on error, for example if the retry limit was
* reached.
+ *
* @return mixed
* @throws DBUnexpectedError
* @throws Exception
return false;
}
- final public function onTransactionIdle( $callback ) {
+ public function serverIsReadOnly() {
+ return false;
+ }
+
+ final public function onTransactionResolution( callable $callback ) {
+ if ( !$this->mTrxLevel ) {
+ throw new DBUnexpectedError( $this, "No transaction is active." );
+ }
+ $this->mTrxEndCallbacks[] = [ $callback, wfGetCaller() ];
+ }
+
+ final public function onTransactionIdle( callable $callback ) {
$this->mTrxIdleCallbacks[] = [ $callback, wfGetCaller() ];
if ( !$this->mTrxLevel ) {
- $this->runOnTransactionIdleCallbacks();
+ $this->runOnTransactionIdleCallbacks( self::TRIGGER_IDLE );
}
}
- final public function onTransactionPreCommitOrIdle( $callback ) {
+ final public function onTransactionPreCommitOrIdle( callable $callback ) {
if ( $this->mTrxLevel ) {
$this->mTrxPreCommitCallbacks[] = [ $callback, wfGetCaller() ];
} else {
- $this->onTransactionIdle( $callback ); // this will trigger immediately
+ // If no transaction is active, then make one for this callback
+ $this->begin( __METHOD__ );
+ try {
+ call_user_func( $callback );
+ $this->commit( __METHOD__ );
+ } catch ( Exception $e ) {
+ $this->rollback( __METHOD__ );
+ throw $e;
+ }
}
}
/**
- * Actually any "on transaction idle" callbacks.
+ * Whether to disable running of post-commit callbacks
+ *
+ * This method should not be used outside of Database/LoadBalancer
+ *
+ * @param bool $suppress
+ * @since 1.28
+ */
+ final public function setPostCommitCallbackSupression( $suppress ) {
+ $this->suppressPostCommitCallbacks = $suppress;
+ }
+
+ /**
+ * Actually run and consume any "on transaction idle/resolution" callbacks.
*
+ * This method should not be used outside of Database/LoadBalancer
+ *
+ * @param integer $trigger IDatabase::TRIGGER_* constant
* @since 1.20
*/
- protected function runOnTransactionIdleCallbacks() {
+ public function runOnTransactionIdleCallbacks( $trigger ) {
+ if ( $this->suppressPostCommitCallbacks ) {
+ return;
+ }
+
$autoTrx = $this->getFlag( DBO_TRX ); // automatic begin() enabled?
$e = $ePrior = null; // last exception
do { // callbacks may add callbacks :)
- $callbacks = $this->mTrxIdleCallbacks;
- $this->mTrxIdleCallbacks = []; // recursion guard
+ $callbacks = array_merge(
+ $this->mTrxIdleCallbacks,
+ $this->mTrxEndCallbacks // include "transaction resolution" callbacks
+ );
+ $this->mTrxIdleCallbacks = []; // consumed (and recursion guard)
+ $this->mTrxEndCallbacks = []; // consumed (recursion guard)
foreach ( $callbacks as $callback ) {
try {
list( $phpCallback ) = $callback;
$this->clearFlag( DBO_TRX ); // make each query its own transaction
- call_user_func( $phpCallback );
+ call_user_func_array( $phpCallback, [ $trigger ] );
if ( $autoTrx ) {
$this->setFlag( DBO_TRX ); // restore automatic begin()
} else {
}
/**
- * Actually any "on transaction pre-commit" callbacks.
+ * Actually run and consume any "on transaction pre-commit" callbacks.
+ *
+ * This method should not be used outside of Database/LoadBalancer
*
* @since 1.22
*/
- protected function runOnTransactionPreCommitCallbacks() {
+ public function runOnTransactionPreCommitCallbacks() {
$e = $ePrior = null; // last exception
do { // callbacks may add callbacks :)
$callbacks = $this->mTrxPreCommitCallbacks;
- $this->mTrxPreCommitCallbacks = []; // recursion guard
+ $this->mTrxPreCommitCallbacks = []; // consumed (and recursion guard)
foreach ( $callbacks as $callback ) {
try {
list( $phpCallback ) = $callback;
final public function endAtomic( $fname = __METHOD__ ) {
if ( !$this->mTrxLevel ) {
- throw new DBUnexpectedError( $this, 'No atomic transaction is open.' );
+ throw new DBUnexpectedError( $this, "No atomic transaction is open (got $fname)." );
}
if ( !$this->mTrxAtomicLevels ||
array_pop( $this->mTrxAtomicLevels ) !== $fname
) {
- throw new DBUnexpectedError( $this, 'Invalid atomic section ended.' );
+ throw new DBUnexpectedError( $this, "Invalid atomic section ended (got $fname)." );
}
if ( !$this->mTrxAtomicLevels && $this->mTrxAutomaticAtomic ) {
} else {
// The transaction was automatic and has done write operations
if ( $this->mTrxDoneWrites ) {
- wfDebug( "$fname: Automatic transaction with writes in progress" .
+ wfLogDBError( "$fname: Automatic transaction with writes in progress" .
" (from {$this->mTrxFname}), performing implicit commit!\n"
);
}
$this->getTransactionProfiler()->transactionWritingOut(
$this->mServer, $this->mDBname, $this->mTrxShortId, $writeTime );
}
- $this->runOnTransactionIdleCallbacks();
+
+ $this->runOnTransactionIdleCallbacks( self::TRIGGER_COMMIT );
}
- # Avoid fatals if close() was called
+ // Avoid fatals if close() was called
$this->assertOpen();
$this->doBegin( $fname );
$this->mTrxAutomatic = false;
$this->mTrxAutomaticAtomic = false;
$this->mTrxAtomicLevels = [];
- $this->mTrxIdleCallbacks = [];
- $this->mTrxPreCommitCallbacks = [];
$this->mTrxShortId = wfRandomString( 12 );
$this->mTrxWriteDuration = 0.0;
$this->mTrxWriteCallers = [];
}
}
- # Avoid fatals if close() was called
+ // Avoid fatals if close() was called
$this->assertOpen();
$this->runOnTransactionPreCommitCallbacks();
$this->getTransactionProfiler()->transactionWritingOut(
$this->mServer, $this->mDBname, $this->mTrxShortId, $writeTime );
}
- $this->runOnTransactionIdleCallbacks();
+
+ $this->runOnTransactionIdleCallbacks( self::TRIGGER_COMMIT );
}
/**
}
}
- # Avoid fatals if close() was called
+ // Avoid fatals if close() was called
$this->assertOpen();
$this->doRollback( $fname );
- $this->mTrxIdleCallbacks = []; // cancel
- $this->mTrxPreCommitCallbacks = []; // cancel
$this->mTrxAtomicLevels = [];
if ( $this->mTrxDoneWrites ) {
$this->getTransactionProfiler()->transactionWritingOut(
$this->mServer, $this->mDBname, $this->mTrxShortId );
}
+
+ $this->mTrxIdleCallbacks = []; // clear
+ $this->mTrxPreCommitCallbacks = []; // clear
+ $this->runOnTransactionIdleCallbacks( self::TRIGGER_ROLLBACK );
}
/**
if ( $this->mTrxLevel && $this->mTrxDoneWrites ) {
trigger_error( "Uncommitted DB writes (transaction from {$this->mTrxFname})." );
}
- if ( count( $this->mTrxIdleCallbacks ) || count( $this->mTrxPreCommitCallbacks ) ) {
+ $danglingCallbacks = array_merge(
+ $this->mTrxIdleCallbacks,
+ $this->mTrxPreCommitCallbacks,
+ $this->mTrxEndCallbacks
+ );
+ if ( $danglingCallbacks ) {
$callers = [];
- foreach ( $this->mTrxIdleCallbacks as $callbackInfo ) {
+ foreach ( $danglingCallbacks as $callbackInfo ) {
$callers[] = $callbackInfo[1];
}
$callers = implode( ', ', $callers );
dépôts / lhc / web / wiklou.git / blobdiff