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authorPierre Schmitz <pierre@archlinux.de>2012-05-03 13:01:35 +0200
committerPierre Schmitz <pierre@archlinux.de>2012-05-03 13:01:35 +0200
commitd9022f63880ce039446fba8364f68e656b7bf4cb (patch)
tree16b40fbf17bf7c9ee6f4ead25b16dd192378050a /includes/DeferredUpdates.php
parent27cf83d177256813e2e802241085fce5dd0f3fb9 (diff)
Update to MediaWiki 1.19.0
Diffstat (limited to 'includes/DeferredUpdates.php')
-rw-r--r--includes/DeferredUpdates.php89
1 files changed, 89 insertions, 0 deletions
diff --git a/includes/DeferredUpdates.php b/includes/DeferredUpdates.php
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+<?php
+/**
+ * Interface that deferrable updates should implement. Basically required so we
+ * can validate input on DeferredUpdates::addUpdate()
+ *
+ * @since 1.19
+ */
+interface DeferrableUpdate {
+ /**
+ * Perform the actual work
+ */
+ function doUpdate();
+}
+
+/**
+ * Class for mananging the deferred updates.
+ *
+ * @since 1.19
+ */
+class DeferredUpdates {
+ /**
+ * Store of updates to be deferred until the end of the request.
+ */
+ private static $updates = array();
+
+ /**
+ * Add an update to the deferred list
+ * @param $update DeferrableUpdate Some object that implements doUpdate()
+ */
+ public static function addUpdate( DeferrableUpdate $update ) {
+ array_push( self::$updates, $update );
+ }
+
+ /**
+ * HTMLCacheUpdates are the most common deferred update people use. This
+ * is a shortcut method for that.
+ * @see HTMLCacheUpdate::__construct()
+ * @param $title
+ * @param $table
+ */
+ public static function addHTMLCacheUpdate( $title, $table ) {
+ self::addUpdate( new HTMLCacheUpdate( $title, $table ) );
+ }
+
+ /**
+ * Do any deferred updates and clear the list
+ *
+ * @param $commit String: set to 'commit' to commit after every update to
+ * prevent lock contention
+ */
+ public static function doUpdates( $commit = '' ) {
+ global $wgDeferredUpdateList;
+
+ wfProfileIn( __METHOD__ );
+
+ $updates = array_merge( $wgDeferredUpdateList, self::$updates );
+
+ // No need to get master connections in case of empty updates array
+ if ( !count( $updates ) ) {
+ wfProfileOut( __METHOD__ );
+ return;
+ }
+
+ $doCommit = $commit == 'commit';
+ if ( $doCommit ) {
+ $dbw = wfGetDB( DB_MASTER );
+ }
+
+ foreach ( $updates as $update ) {
+ $update->doUpdate();
+
+ if ( $doCommit && $dbw->trxLevel() ) {
+ $dbw->commit( __METHOD__ );
+ }
+ }
+
+ self::clearPendingUpdates();
+ wfProfileOut( __METHOD__ );
+ }
+
+ /**
+ * Clear all pending updates without performing them. Generally, you don't
+ * want or need to call this. Unit tests need it though.
+ */
+ public static function clearPendingUpdates() {
+ global $wgDeferredUpdateList;
+ $wgDeferredUpdateList = self::$updates = array();
+ }
+}