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/**
*
* Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
*
* 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.apache.tuscany.core.invocation.impl;
import java.util.List;
import org.apache.tuscany.core.invocation.MessageChannel;
import org.apache.tuscany.core.invocation.MessageHandler;
import org.apache.tuscany.core.message.Message;
/**
* A channel comprising an ordered collection of message handlers.
*
*@see org.apache.tuscany.core.message.Message
* @version $Rev$ $Date$
*/
public class MessageChannelImpl implements MessageChannel {
private final List<MessageHandler> pipeline;
//----------------------------------
// Constructors
//----------------------------------
/**
* Construct a new channel comprising the supplied list of handlers.
*
* @param pipeline the Handlers in the channel
*/
public MessageChannelImpl(List<MessageHandler> pipeline) {
this.pipeline = pipeline;
}
//----------------------------------
// Methods
//----------------------------------
/**
* Send a message down the channel. The message will be processed by all handlers
* in order until one returns false to indicate processing is complete or all
* handlers have been called.
*
* @param msg a Message to send down the channel
*/
public void send(Message msg) {
if (pipeline!=null) {
for (MessageHandler handler : pipeline) {
if (!handler.processMessage(msg)) {
break;
}
}
}
}
}
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