fix flushing stale tags

Author: taylorotwell

src/Illuminate/Cache/Console/PruneStaleTagsCommand.php

@@ -35,14 +35,10 @@ public function handle(CacheManager $cache)
     {
         $cache = $cache->store($this->argument('store'));
 
-        if (! $cache->getStore() instanceof RedisStore) {
-            $this->components->error('Pruning cache tags is only necessary when using Redis.');
-
-            return 1;
+        if (method_exists($cache->getStore(), 'flushStaleTags')) {
+            $cache->flushStaleTags();
         }
 
-        $cache->flushStaleTags();
-
         $this->components->info('Stale cache tags pruned successfully.');
     }
 

src/Illuminate/Cache/FailoverStore.php

@@ -3,6 +3,7 @@
 namespace Illuminate\Cache;
 
 use Illuminate\Cache\Events\CacheFailedOver;
+use Illuminate\Cache\RedisStore;
 use Illuminate\Contracts\Cache\LockProvider;
 use Illuminate\Contracts\Events\Dispatcher;
 use RuntimeException;
@@ -162,6 +163,22 @@ public function flush()
         return $this->attemptOnAllStores(__FUNCTION__, func_get_args());
     }
 
+    /**
+     * Remove all expired tag set entries.
+     *
+     * @return void
+     */
+    public function flushStaleTags()
+    {
+        foreach ($this->stores as $store) {
+            if ($this->store($store) instanceof RedisStore) {
+                $this->store($store)->flushStaleTags();
+
+                break;
+            }
+        }
+    }
+
     /**
      * Get the cache key prefix.
      *