Fixes to comply with adapter-common 0.2

src/MemcachedCachePool.php

@@ -40,7 +40,11 @@ public function __construct(\Memcached $cache)
 
     protected function fetchObjectFromCache($key)
     {
-        return $this->cache->get($this->trimKey($this->getHierarchyKey($key)));
+        if (false === $result = unserialize($this->cache->get($this->getHierarchyKey($key)))) {
+            return [false, null];
+        }
+
+        return $result;
     }
 
     protected function clearAllObjectsFromCache()
@@ -51,8 +55,8 @@ protected function clearAllObjectsFromCache()
     protected function clearOneObjectFromCache($key)
     {
         $this->commit();
-        $key = $this->trimKey($this->getHierarchyKey($key, $path));
-        $this->cache->increment($this->trimKey($path), 1, 0);
+        $key = $this->getHierarchyKey($key, $path);
+        $this->cache->increment($path, 1, 0);
         $this->clearHierarchyKeyCache();
 
         if ($this->cache->delete($key)) {
@@ -69,28 +73,13 @@ protected function storeItemInCache($key, CacheItemInterface $item, $ttl)
             $ttl = 0;
         }
 
-        $key = $this->trimKey($this->getHierarchyKey($key));
+        $key = $this->getHierarchyKey($key);
 
-        return $this->cache->set($key, $item, $ttl);
+        return $this->cache->set($key, serialize([true, $item->get()]), $ttl);
     }
 
     protected function getValueFormStore($key)
     {
-        return $this->cache->get($this->trimKey($key));
-    }
-
-    /**
-     * Calculate a key. If it is more than 250 chars we should hash the key.
-     *
-     * @param $key
-     * @param null $ref
-     */
-    private function trimKey($key)
-    {
-        if (strlen($key) < 250) {
-            return $key;
-        }
-        // This should maybe be logged
-        return sha1($key);
+        return $this->cache->get($key);
     }
 }