Fix installer issues introduces by MediaWikiServices

[lhc/web/wiklou.git] / includes / objectcache / ObjectCache.php

diff --git a/includes/objectcache/ObjectCache.php b/includes/objectcache/ObjectCache.php
index bf152b6..e1bb2db 100644 (file)
--- a/includes/objectcache/ObjectCache.php
+++ b/includes/objectcache/ObjectCache.php
@@ -22,6 +22,8 @@
  */
 
 use MediaWiki\Logger\LoggerFactory;
+use MediaWiki\MediaWikiServices;
+use MediaWiki\Services\ServiceDisabledException;
 
 /**
  * Functions to get cache objects
@@ -225,7 +227,18 @@ class ObjectCache {
                                return self::getInstance( $candidate );
                        }
                }
-               return self::getInstance( CACHE_DB );
+
+               try {
+                       // Make sure we actually have a DB backend before falling back to CACHE_DB
+                       MediaWikiServices::getInstance()->getDBLoadBalancer();
+                       $candidate = CACHE_DB;
+               } catch ( ServiceDisabledException $e ) {
+                       // The LoadBalancer is disabled, probably because
+                       // MediaWikiServices::disableStorageBackend was called.
+                       $candidate = CACHE_NONE;
+               }
+
+               return self::getInstance( $candidate );
        }
 
        /**
@@ -298,8 +311,11 @@ class ObjectCache {
                }
 
                $params = $wgWANObjectCaches[$id];
-               $class = $params['relayerConfig']['class'];
-               $params['relayer'] = new $class( $params['relayerConfig'] );
+               foreach ( $params['channels'] as $action => $channel ) {
+                       $params['relayers'][$action] = MediaWikiServices::getInstance()->getEventRelayerGroup()
+                               ->getRelayer( $channel );
+                       $params['channels'][$action] = $channel;
+               }
                $params['cache'] = self::newFromId( $params['cacheId'] );
                if ( isset( $params['loggroup'] ) ) {
                        $params['logger'] = LoggerFactory::getInstance( $params['loggroup'] );