Merge "MovePage: Fix old, old bug with moving over redirects"

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

diff --git a/includes/libs/objectcache/BagOStuff.php b/includes/libs/objectcache/BagOStuff.php
index 1a2711a..5472e83 100644 (file)
--- a/includes/libs/objectcache/BagOStuff.php
+++ b/includes/libs/objectcache/BagOStuff.php
@@ -46,7 +46,7 @@ abstract class BagOStuff implements IExpiringStore, LoggerAwareInterface {
        /** @var array[] Lock tracking */
        protected $locks = [];
 
-       /** @var integer */
+       /** @var integer ERR_* class constant */
        protected $lastError = self::ERR_NONE;
 
        /** @var string */
@@ -70,6 +70,9 @@ abstract class BagOStuff implements IExpiringStore, LoggerAwareInterface {
        /** @var bool */
        private $dupeTrackScheduled = false;
 
+       /** @var integer[] Map of (ATTR_* class constant => QOS_* class constant) */
+       protected $attrMap = [];
+
        /** Possible values for getLastError() */
        const ERR_NONE = 0; // no error
        const ERR_NO_RESPONSE = 1; // no response
@@ -369,6 +372,20 @@ abstract class BagOStuff implements IExpiringStore, LoggerAwareInterface {
                return $success;
        }
 
+       /**
+        * Reset the TTL on a key if it exists
+        *
+        * @param string $key
+        * @param int $expiry
+        * @return bool Success Returns false if there is no key
+        * @since 1.28
+        */
+       public function changeTTL( $key, $expiry = 0 ) {
+               $value = $this->get( $key );
+
+               return ( $value === false ) ? false : $this->set( $key, $value, $expiry );
+       }
+
        /**
         * Acquire an advisory lock on a key string
         *
@@ -734,4 +751,34 @@ abstract class BagOStuff implements IExpiringStore, LoggerAwareInterface {
        public function makeKey() {
                return $this->makeKeyInternal( $this->keyspace, func_get_args() );
        }
+
+       /**
+        * @param integer $flag ATTR_* class constant
+        * @return integer QOS_* class constant
+        * @since 1.28
+        */
+       public function getQoS( $flag ) {
+               return isset( $this->attrMap[$flag] ) ? $this->attrMap[$flag] : self::QOS_UNKNOWN;
+       }
+
+       /**
+        * Merge the flag maps of one or more BagOStuff objects into a "lowest common denominator" map
+        *
+        * @param BagOStuff[] $bags
+        * @return integer[] Resulting flag map (class ATTR_* constant => class QOS_* constant)
+        */
+       protected function mergeFlagMaps( array $bags ) {
+               $map = [];
+               foreach ( $bags as $bag ) {
+                       foreach ( $bag->attrMap as $attr => $rank ) {
+                               if ( isset( $map[$attr] ) ) {
+                                       $map[$attr] = min( $map[$attr], $rank );
+                               } else {
+                                       $map[$attr] = $rank;
+                               }
+                       }
+               }
+
+               return $map;
+       }
 }