Java tutorial
/* * 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.cssweb.payment.posp.client; import com.cssweb.payment.posp.network.CustomMessage; import io.netty.channel.ChannelFuture; import io.netty.channel.ChannelFutureListener; import io.netty.channel.ChannelHandlerContext; import io.netty.channel.SimpleChannelInboundHandler; import org.apache.logging.log4j.LogManager; import org.apache.logging.log4j.Logger; import java.util.concurrent.BlockingQueue; import java.util.concurrent.LinkedBlockingQueue; public class NettyClientHandler extends SimpleChannelInboundHandler<CustomMessage> { private static final Logger logger = LogManager.getLogger(NettyClientHandler.class.getName()); private ChannelHandlerContext ctx; final BlockingQueue<CustomMessage> answer = new LinkedBlockingQueue<CustomMessage>(); /** * ??? * @param customMessage */ public void sendResponse(CustomMessage customMessage) { ChannelFuture future = null; future = ctx.write(customMessage); future.addListener(numberSender); ctx.flush(); } public void sendRequest(CustomMessage customMessage) { ChannelFuture future = null; future = ctx.write(customMessage); future.addListener(numberSender); ctx.flush(); } private final ChannelFutureListener numberSender = new ChannelFutureListener() { @Override public void operationComplete(ChannelFuture future) throws Exception { if (future.isSuccess()) { logger.info("????"); } else { future.cause().printStackTrace(); future.channel().close(); } } }; public CustomMessage recvResponse() { boolean interrupted = false; try { for (;;) { try { System.out.println("recvResponse"); return answer.take(); } catch (InterruptedException ignore) { interrupted = true; } } } finally { if (interrupted) { // Thread.currentThread().interrupt(); } } } @Override public void channelActive(ChannelHandlerContext ctx) { this.ctx = ctx; } @Override protected void channelRead0(ChannelHandlerContext channelHandlerContext, CustomMessage customMessage) throws Exception { System.out.println("recv msg"); answer.offer(customMessage); } @Override public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) { cause.printStackTrace(); ctx.close(); } }