Java tutorial
package com.kixeye.kixmpp.p2p.node; /* * #%L * Zaqar * %% * Copyright (C) 2014 Charles Barry * %% * Licensed 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. * #L% */ import com.kixeye.kixmpp.p2p.message.MessageRegistry; import com.kixeye.kixmpp.p2p.serialization.ProtostuffDecoder; import com.kixeye.kixmpp.p2p.serialization.ProtostuffEncoder; import io.netty.bootstrap.Bootstrap; import io.netty.channel.*; import io.netty.channel.socket.SocketChannel; import io.netty.channel.socket.nio.NioSocketChannel; import io.netty.handler.codec.LengthFieldBasedFrameDecoder; import io.netty.handler.codec.LengthFieldPrepender; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public class NodeClient { private static final Logger logger = LoggerFactory.getLogger(NodeClient.class); private Channel channel; public void initialize(final String host, int port, final EventLoopGroup workerGroup, final MessageRegistry messageRegistry, final ChannelInboundHandlerAdapter channelListener) throws InterruptedException { // prepare connection Bootstrap boot = new Bootstrap(); boot.group(workerGroup); boot.channel(NioSocketChannel.class); boot.option(ChannelOption.SO_KEEPALIVE, true); boot.option(ChannelOption.TCP_NODELAY, true); boot.handler(new ChannelInitializer<SocketChannel>() { @Override protected void initChannel(SocketChannel ch) throws Exception { ChannelPipeline p = ch.pipeline(); //p.addLast(new LoggingHandler()); // encoders p.addLast(new LengthFieldPrepender(4)); p.addLast(new ProtostuffEncoder(messageRegistry)); // decoders p.addLast(new LengthFieldBasedFrameDecoder(0x100000, 0, 4, 0, 4)); p.addLast(new ProtostuffDecoder(messageRegistry)); p.addLast(channelListener); } }); // connect channel = boot.connect(host, port).sync().channel(); } public void send(Object msg) { channel.writeAndFlush(msg); } public void shutdown() { try { channel.close().sync(); } catch (InterruptedException e) { logger.error("Exception shutting down", e); } } }