com.github.herong.rpc.netty.protobuf.demo3.Demo3ProtobufClientHandler.java Source code

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Here is the source code for com.github.herong.rpc.netty.protobuf.demo3.Demo3ProtobufClientHandler.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.github.herong.rpc.netty.protobuf.demo3;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Handler implementation for the echo client. It initiates the ping-pong
 * traffic between the echo client and server by sending the first message to
 * the server.
 */
public class Demo3ProtobufClientHandler extends ChannelInboundHandlerAdapter {

    private static final Logger logger = LoggerFactory.getLogger(Demo3ProtobufClientHandler.class);

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        logger.info("client channel active {}", ctx.channel());
        ctx.channel().writeAndFlush(CommandBuilder.buildHeartbeat());
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        logger.info("receive protobuf message {}", msg);
    }

    @Override
    public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
        logger.info("channelReadComplete {}", ctx.channel());
        ctx.flush();
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        // Close the connection when an exception is raised.
        logger.error("Unexpected exception from downstream.", cause);
        ctx.close();
    }
}