Merge "Add GENDER to rollback-success message"

[lhc/web/wiklou.git] / includes / libs / objectcache / WANObjectCache.php

diff --git a/includes/libs/objectcache/WANObjectCache.php b/includes/libs/objectcache/WANObjectCache.php
index 171c291..75c79a9 100644 (file)
--- a/includes/libs/objectcache/WANObjectCache.php
+++ b/includes/libs/objectcache/WANObjectCache.php
@@ -1127,6 +1127,65 @@ class WANObjectCache implements IExpiringStore, LoggerAwareInterface {
                return $values;
        }
 
+       /**
+        * Locally set a key to expire soon if it is stale based on $purgeTimestamp
+        *
+        * This sets stale keys' time-to-live at HOLDOFF_TTL seconds, which both avoids
+        * broadcasting in mcrouter setups and also avoids races with new tombstones.
+        *
+        * @param string $key Cache key
+        * @param int $purgeTimestamp UNIX timestamp of purge
+        * @param bool &$isStale Whether the key is stale
+        * @return bool Success
+        * @since 1.28
+        */
+       public function reap( $key, $purgeTimestamp, &$isStale = false ) {
+               $minAsOf = $purgeTimestamp + self::HOLDOFF_TTL;
+               $wrapped = $this->cache->get( self::VALUE_KEY_PREFIX . $key );
+               if ( is_array( $wrapped ) && $wrapped[self::FLD_TIME] < $minAsOf ) {
+                       $isStale = true;
+                       $this->logger->warning( "Reaping stale value key '$key'." );
+                       $ttlReap = self::HOLDOFF_TTL; // avoids races with tombstone creation
+                       $ok = $this->cache->changeTTL( self::VALUE_KEY_PREFIX . $key, $ttlReap );
+                       if ( !$ok ) {
+                               $this->logger->error( "Could not complete reap of key '$key'." );
+                       }
+
+                       return $ok;
+               }
+
+               $isStale = false;
+
+               return true;
+       }
+
+       /**
+        * Locally set a "check" key to expire soon if it is stale based on $purgeTimestamp
+        *
+        * @param string $key Cache key
+        * @param int $purgeTimestamp UNIX timestamp of purge
+        * @param bool &$isStale Whether the key is stale
+        * @return bool Success
+        * @since 1.28
+        */
+       public function reapCheckKey( $key, $purgeTimestamp, &$isStale = false ) {
+               $purge = $this->parsePurgeValue( $this->cache->get( self::TIME_KEY_PREFIX . $key ) );
+               if ( $purge && $purge[self::FLD_TIME] < $purgeTimestamp ) {
+                       $isStale = true;
+                       $this->logger->warning( "Reaping stale check key '$key'." );
+                       $ok = $this->cache->changeTTL( self::TIME_KEY_PREFIX . $key, 1 );
+                       if ( !$ok ) {
+                               $this->logger->error( "Could not complete reap of check key '$key'." );
+                       }
+
+                       return $ok;
+               }
+
+               $isStale = false;
+
+               return false;
+       }
+
        /**
         * @see BagOStuff::makeKey()
         * @param string ... Key component