com.joey.handler.MessageHandler.java Source code

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Here is the source code for com.joey.handler.MessageHandler.java

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/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project 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 com.joey.handler;

import com.joey.common.JobQueue;
import com.joey.common.Protocol;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import org.apache.log4j.Logger;

/**
 * Handles a server-side channel.
 */
public class MessageHandler extends SimpleChannelInboundHandler<Object> {

    private final static Logger logger = Logger.getLogger(MessageHandler.class);

    private JobQueue<Protocol> jobQueue;

    public MessageHandler(JobQueue jobQueue) {
        this.jobQueue = jobQueue;
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        // Close the connection when an exception is raised.
        cause.printStackTrace();
        ctx.close();
    }

    /**
     * keep in mind this method name will rename to
     * {@code messageReceived(ChannelHandlerContext, I)} in 5.0 version
     * @param ctx
     * @param msg
     * @throws Exception
     */
    protected void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {
        if (!(msg instanceof Protocol)) {
            logger.info("Object must be Protocol.");
            return;
        }

        // TODO need start a thread to process one message
        Protocol request = (Protocol) msg;
        request.attach(ctx);
        if (jobQueue == null) {
            jobQueue = JobQueue.getInstance();
        }

        jobQueue.add(request);
    }

}