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a light weight, easy to use and high performance remoting framework based on netty.

There is a newer version: 1.6.11

/*
 * 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 com.alipay.remoting.rpc;

import com.alipay.remoting.Connection;
import com.alipay.remoting.Protocol;
import com.alipay.remoting.ProtocolCode;
import com.alipay.remoting.ProtocolManager;

import io.netty.channel.ChannelDuplexHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelHandler.Sharable;
import io.netty.handler.timeout.IdleStateEvent;

/**
 * Heart beat triggerd.
 * 
 * @author jiangping
 * @version $Id: HeartbeatHandler.java, v 0.1 2015-12-14 PM3:16:00 tao Exp $
 */
@Sharable
public class HeartbeatHandler extends ChannelDuplexHandler {

    /**
     * 
     * @see io.netty.channel.ChannelInboundHandlerAdapter#userEventTriggered(io.netty.channel.ChannelHandlerContext, java.lang.Object)
     */
    @Override
    public void userEventTriggered(final ChannelHandlerContext ctx, Object evt) throws Exception {
        if (evt instanceof IdleStateEvent) {
            ProtocolCode protocolCode = ctx.channel().attr(Connection.PROTOCOL).get();
            Protocol protocol = ProtocolManager.getProtocol(protocolCode);
            protocol.getHeartbeatTrigger().heartbeatTriggered(ctx);
        } else {
            super.userEventTriggered(ctx, evt);
        }
    }
}