Merge "Perform a permission check on the title when changing the page language"

[lhc/web/wiklou.git] / includes / deferred / DeferredUpdates.php

diff --git a/includes/deferred/DeferredUpdates.php b/includes/deferred/DeferredUpdates.php
index 51f5a28..e8f27ef 100644 (file)
--- a/includes/deferred/DeferredUpdates.php
+++ b/includes/deferred/DeferredUpdates.php
@@ -76,9 +76,12 @@ class DeferredUpdates {
        public static function addUpdate( DeferrableUpdate $update, $stage = self::POSTSEND ) {
                global $wgCommandLineMode;
 
-               // This is a sub-DeferredUpdate, run it right after its parent update
                if ( self::$executeContext && self::$executeContext['stage'] >= $stage ) {
+                       // This is a sub-DeferredUpdate; run it right after its parent update.
+                       // Also, while post-send updates are running, push any "pre-send" jobs to the
+                       // active post-send queue to make sure they get run this round (or at all).
                        self::$executeContext['subqueue'][] = $update;
+
                        return;
                }
 
@@ -183,16 +186,6 @@ class DeferredUpdates {
                while ( $updates ) {
                        $queue = []; // clear the queue
 
-                       if ( $mode === 'enqueue' ) {
-                               try {
-                                       // Push enqueuable updates to the job queue and get the rest
-                                       $updates = self::enqueueUpdates( $updates );
-                               } catch ( Exception $e ) {
-                                       // Let other updates have a chance to run if this failed
-                                       MWExceptionHandler::rollbackMasterChangesAndLog( $e );
-                               }
-                       }
-
                        // Order will be DataUpdate followed by generic DeferrableUpdate tasks
                        $updatesByType = [ 'data' => [], 'generic' => [] ];
                        foreach ( $updates as $du ) {
@@ -212,13 +205,9 @@ class DeferredUpdates {
                        // Execute all remaining tasks...
                        foreach ( $updatesByType as $updatesForType ) {
                                foreach ( $updatesForType as $update ) {
-                                       self::$executeContext = [
-                                               'update' => $update,
-                                               'stage' => $stage,
-                                               'subqueue' => []
-                                       ];
+                                       self::$executeContext = [ 'stage' => $stage, 'subqueue' => [] ];
                                        /** @var DeferrableUpdate $update */
-                                       $guiError = self::runUpdate( $update, $lbFactory, $stage );
+                                       $guiError = self::runUpdate( $update, $lbFactory, $mode, $stage );
                                        $reportableError = $reportableError ?: $guiError;
                                        // Do the subqueue updates for $update until there are none
                                        while ( self::$executeContext['subqueue'] ) {
@@ -230,7 +219,7 @@ class DeferredUpdates {
                                                        $subUpdate->setTransactionTicket( $ticket );
                                                }
 
-                                               $guiError = self::runUpdate( $subUpdate, $lbFactory, $stage );
+                                               $guiError = self::runUpdate( $subUpdate, $lbFactory, $mode, $stage );
                                                $reportableError = $reportableError ?: $guiError;
                                        }
                                        self::$executeContext = null;
@@ -248,16 +237,26 @@ class DeferredUpdates {
        /**
         * @param DeferrableUpdate $update
         * @param LBFactory $lbFactory
+        * @param string $mode
         * @param integer $stage
         * @return ErrorPageError|null
         */
-       private static function runUpdate( DeferrableUpdate $update, LBFactory $lbFactory, $stage ) {
+       private static function runUpdate(
+               DeferrableUpdate $update, LBFactory $lbFactory, $mode, $stage
+       ) {
                $guiError = null;
                try {
-                       $fnameTrxOwner = get_class( $update ) . '::doUpdate';
-                       $lbFactory->beginMasterChanges( $fnameTrxOwner );
-                       $update->doUpdate();
-                       $lbFactory->commitMasterChanges( $fnameTrxOwner );
+                       if ( $mode === 'enqueue' && $update instanceof EnqueueableDataUpdate ) {
+                               // Run only the job enqueue logic to complete the update later
+                               $spec = $update->getAsJobSpecification();
+                               JobQueueGroup::singleton( $spec['wiki'] )->push( $spec['job'] );
+                       } else {
+                               // Run the bulk of the update now
+                               $fnameTrxOwner = get_class( $update ) . '::doUpdate';
+                               $lbFactory->beginMasterChanges( $fnameTrxOwner );
+                               $update->doUpdate();
+                               $lbFactory->commitMasterChanges( $fnameTrxOwner );
+                       }
                } catch ( Exception $e ) {
                        // Reporting GUI exceptions does not work post-send
                        if ( $e instanceof ErrorPageError && $stage === self::PRESEND ) {
@@ -286,7 +285,7 @@ class DeferredUpdates {
                }
 
                // Avoiding running updates without them having outer scope
-               if ( !self::getBusyDbConnections() ) {
+               if ( !self::areDatabaseTransactionsActive() ) {
                        self::doUpdates( $mode );
                        return true;
                }
@@ -356,16 +355,19 @@ class DeferredUpdates {
        }
 
        /**
-        * @return IDatabase[] Connection where commit() cannot be called yet
+        * @return bool If a transaction round is active or connection is not ready for commit()
         */
-       private static function getBusyDbConnections() {
-               $connsBusy = [];
-
+       private static function areDatabaseTransactionsActive() {
                $lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
+               if ( $lbFactory->hasTransactionRound() ) {
+                       return true;
+               }
+
+               $connsBusy = false;
                $lbFactory->forEachLB( function ( LoadBalancer $lb ) use ( &$connsBusy ) {
                        $lb->forEachOpenMasterConnection( function ( IDatabase $conn ) use ( &$connsBusy ) {
                                if ( $conn->writesOrCallbacksPending() || $conn->explicitTrxActive() ) {
-                                       $connsBusy[] = $conn;
+                                       $connsBusy = true;
                                }
                        } );
                } );