/*
 * Copyright 2005-2006 The Apache Software Foundation.
 *
 * 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.servicemix.client;

import javax.jbi.messaging.MessageExchange;

/**
 * A listener which is called when a message is available to be processed.
 * 
 * @version $Revision: $
 */
public interface MessageListener {

    /**
     * Processes the message. By the completion of this method call, without exceptions
     * being thrown the message is assumed to be processed unless the status is updated
     * on the exchange.
     * 
     * @param exchange
     * @param message
     * @throws Exception if the message could not be processed correctly
     */
    public void onMessage(MessageExchange exchange, Message message) throws Exception;
}
