Cache: Use getUserCache cache in OC_Cache

lib/cache.php

@@ -7,7 +7,7 @@
  */
 
 class OC_Cache {
-	static protected $cache;
+	static protected $user_cache;
 	static protected $global_cache;
 
 	static public function getGlobalCache() {
@@ -18,61 +18,48 @@ class OC_Cache {
 	}
 
 	static public function getUserCache() {
-		if (!self::$cache) {
-			self::init();
-		}
-		return self::$cache;
-	}
-	static protected function init() {
-		$fast_cache = null;
-		if (!$fast_cache && function_exists('xcache_set')) {
-			$fast_cache = new OC_Cache_XCache();
-		}
-		if (!$fast_cache && function_exists('apc_store')) {
-			$fast_cache = new OC_Cache_APC();
-		}
-		self::$cache = new OC_Cache_File();
-		if ($fast_cache) {
-			self::$cache = new OC_Cache_Broker($fast_cache, self::$cache);
+		if (!self::$user_cache) {
+			$fast_cache = null;
+			if (!$fast_cache && function_exists('xcache_set')) {
+				$fast_cache = new OC_Cache_XCache();
+			}
+			if (!$fast_cache && function_exists('apc_store')) {
+				$fast_cache = new OC_Cache_APC();
+			}
+			self::$user_cache = new OC_Cache_File();
+			if ($fast_cache) {
+				self::$user_cache = new OC_Cache_Broker($fast_cache, self::$user_cache);
+			}
 		}
+		return self::$user_cache;
 	}
 
 	static public function get($key) {
-		if (!self::$cache) {
-			self::init();
-		}
-		return self::$cache->get($key);
+		$user_cache = self::getUserCache();
+		return $user_cache->get($key);
 	}
 
 	static public function set($key, $value, $ttl=0) {
 		if (empty($key)) {
 			return false;
 		}
-		if (!self::$cache) {
-			self::init();
-		}
-		return self::$cache->set($key, $value, $ttl);
+		$user_cache = self::getUserCache();
+		return $user_cache->set($key, $value, $ttl);
 	}
 
 	static public function hasKey($key) {
-		if (!self::$cache) {
-			self::init();
-		}
-		return self::$cache->hasKey($key);
+		$user_cache = self::getUserCache();
+		return $user_cache->hasKey($key);
 	}
 
 	static public function remove($key) {
-		if (!self::$cache) {
-			self::init();
-		}
-		return self::$cache->remove($key);
+		$user_cache = self::getUserCache();
+		return $user_cache->remove($key);
 	}
 
 	static public function clear() {
-		if (!self::$cache) {
-			self::init();
-		}
-		return self::$cache->clear();
+		$user_cache = self::getUserCache();
+		return $user_cache->clear();
 	}
 
 }