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/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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.mina.handler.demux;

import org.apache.mina.core.session.IoSession;

/**
 * A handler interface that {@link DemuxingIoHandler} forwards
 * messageReceived or messageSent events to.  You have to
 * register your handler with the type of the message you want to get notified
 * using {@link DemuxingIoHandler#addReceivedMessageHandler(Class, MessageHandler)}
 * or {@link DemuxingIoHandler#addSentMessageHandler(Class, MessageHandler)}.
 *
 * @param  The message type
 * @author Apache MINA Project
 */
public interface MessageHandler {
    /**
     * A {@link MessageHandler} that does nothing.  This is useful when
     * you want to ignore a message of a specific type silently.
     */
    MessageHandler