Moved the MessageHandler interface into the 'org.springframework.integration.adapter' module/package since it is now only used for proxy-based Messaging Gateways.

org.springframework.integration/src/main/java/org/springframework/integration/handler/MessageHandler.java

@@ -1,32 +0,0 @@
-/*
- * Copyright 2002-2008 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.integration.handler;
-
-import org.springframework.integration.message.Message;
-
-/**
- * Base message handler interface. Typical implementations will translate
- * between the generic Messages of the integration framework and the domain
- * objects that are passed-to and returned-from business components.
- * 
- * @author Mark Fisher
- */
-public interface MessageHandler {
-
-	Message<?> handle(Message<?> message);
-
-}