dubbo框架内部extension的配置从目录 META-INF/dubbo移动到META-INF/dubbo/internal

git-svn-id: http://code.alibabatech.com/svn/dubbo/trunk@1928 1a56cb94-b969-4eaa-88fa-be21384802f2

dubbo-common/src/main/java/com/alibaba/dubbo/common/extension/ExtensionLoader.java

@@ -64,6 +64,8 @@ public class ExtensionLoader<T> {
 	private static final String SERVICES_DIRECTORY = "META-INF/services/";
 
     private static final String DUBBO_DIRECTORY = "META-INF/dubbo/";
+
+    private static final String DUBBO_INTERNAL_DIRECTORY = DUBBO_DIRECTORY + "internal/";
 
     private static final Pattern NAME_SEPARATOR = Pattern.compile("\\s*[,]+\\s*");
 
@@ -476,6 +478,7 @@ private Map<String, Class<?>> loadExtensionClasses() {
         }
 
         Map<String, Class<?>> extensionClasses = new HashMap<String, Class<?>>();
+        loadFile(extensionClasses, DUBBO_INTERNAL_DIRECTORY);
         loadFile(extensionClasses, DUBBO_DIRECTORY);
         loadFile(extensionClasses, SERVICES_DIRECTORY);
         return extensionClasses;