#init
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package com.maibu.netty;
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import com.fastbee.common.MiddleConstant;
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import com.fastbee.netty.handler.*;
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import io.netty.bootstrap.Bootstrap;
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import io.netty.channel.nio.NioEventLoopGroup;
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import io.netty.channel.socket.SocketChannel;
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import io.netty.channel.socket.nio.NioSocketChannel;
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import io.netty.handler.timeout.IdleStateHandler;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.util.concurrent.TimeUnit;
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/**
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* Netty客户端实现类
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* 提供与TCP服务器的连接管理、消息发送、重连机制和心跳检测功能
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*/
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public class NettyClient {
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private static final Logger logger = LoggerFactory.getLogger(NettyClient.class);
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// private static volatile NettyClient instance;
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public String token;
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public String userName;
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public String requestDeviceId; //前端需要连接的设备
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public String currentDeviceId; //当前连接的设备
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public Long heartBeatTimer;
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public String key; //userName + web + token
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public String host;
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public int port;
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public int reconnectDelay = 5;
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public int heartbeatInterval = 5;
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public EventLoopGroup group;
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public Bootstrap bootstrap;
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public Channel channel;
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public Long lastSwitchTime = -1L;
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public Long Interval = 5000L;
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public static final byte[] HEARTBEAT_PACKET = new byte[]{(byte) 0xAB, (byte) 0xAA, (byte) 0xFF, (byte) 0xAA, (byte) 0xAB};
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// /**
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// * 获取单例实例（无回调）
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// */
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// public static NettyClient getInstance() {
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// if (instance == null) {
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// synchronized (NettyClient.class) {
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// if (instance == null) {
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// instance = new NettyClient();
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// }
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// }
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// }
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// return instance;
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// }
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/**
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* 初始化并连接到服务器
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*/
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public void initConnect(String host, int port) {
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if (channel != null && channel.isActive()) {
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logger.info("Netty客户端已连接，不重复初始化");
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return;
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}
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this.host = host;
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this.port = port;
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connect();
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}
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/**
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* 初始化Netty客户端
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*/
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public void initClient() {
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group = new NioEventLoopGroup();
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bootstrap = new Bootstrap();
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bootstrap.group(group)
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.channel(NioSocketChannel.class)
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.option(ChannelOption.SO_KEEPALIVE, true)
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.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 5000)
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.handler(new ChannelInitializer<SocketChannel>() {
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@Override
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protected void initChannel(SocketChannel ch) {
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ChannelPipeline pipeline = ch.pipeline();
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// 设置共享属性
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ch.attr(MiddleConstant.ATT_MASTER_KEY).set(key);
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// 空闲检测处理器（心跳）
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pipeline.addLast(new IdleStateHandler(0, heartbeatInterval, 0, TimeUnit.SECONDS));
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pipeline.addLast(new MiddleHeaderFooterDecoder());
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// 编解码器
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pipeline.addLast(new MiddleHexDecoder());
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pipeline.addLast(new MiddleHexEncoder());
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// 自定义处理器
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pipeline.addLast(new ClientHandler());
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}
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});
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}
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/**
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* 连接到服务器
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*/
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public void connect() {
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if (bootstrap == null || host == null || port <= 0) {
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logger.error("Netty客户端未正确初始化");
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return;
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}
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logger.info("正在连接到Netty服务器: {}:{}", host, port);
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bootstrap.connect(host, port).addListener((ChannelFutureListener) future -> {
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if (future.isSuccess()) {
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channel = future.channel();
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logger.info("Netty客户端连接成功: {}:{}", host, port);
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// notifyConnectionStatus(true);
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} else {
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logger.error("Netty客户端连接失败，{}秒后重试: {}", reconnectDelay, future.cause().getMessage());
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// notifyConnectionStatus(false);
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// 重连
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group.schedule(this::connect, reconnectDelay, TimeUnit.SECONDS);
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}
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});
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}
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/**
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* 断开连接
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*/
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public void disconnect() {
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if (channel != null) {
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channel.close();
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channel = null;
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}
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// notifyConnectionStatus(false);
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logger.info("Netty客户端已断开连接");
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}
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/**
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* 发送数据
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*/
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public void sendData(byte[] data) {
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if (channel != null && channel.isActive()) {
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channel.writeAndFlush(data).addListener((ChannelFutureListener) future -> {
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if (future.isSuccess()) {
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logger.debug("Netty客户端发送数据成功: {}", bytesToHex(data));
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} else {
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logger.error("Netty客户端发送数据失败: {}", future.cause().getMessage());
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}
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});
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} else {
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logger.error("Netty客户端未连接，发送数据失败");
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}
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}
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/**
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* 发送十六进制字符串数据
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*/
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public void sendHexData(String hexData) {
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try {
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byte[] data = hexStringToBytes(hexData);
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sendData(data);
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} catch (IllegalArgumentException e) {
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logger.error("无效的十六进制字符串: {}", hexData);
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}
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}
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/**
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* 十六进制字符串转字节数组
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*/
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private static byte[] hexStringToBytes(String hexString) {
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hexString = hexString.replaceAll("\\s+", "");
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if (hexString.length() % 2 != 0) {
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throw new IllegalArgumentException("十六进制字符串长度必须为偶数");
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}
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byte[] result = new byte[hexString.length() / 2];
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for (int i = 0; i < hexString.length(); i += 2) {
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result[i / 2] = (byte) Integer.parseInt(hexString.substring(i, i + 2), 16);
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}
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return result;
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}
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/**
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* 字节数组转十六进制字符串
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*/
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private static String bytesToHex(byte[] bytes) {
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StringBuilder sb = new StringBuilder();
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for (byte b : bytes) {
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sb.append(String.format("%02X ", b));
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}
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return sb.toString().trim();
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}
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/**
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* 检查客户端是否已连接
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*/
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public boolean isConnected() {
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return channel != null && channel.isActive();
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}
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/**
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* 设置重连延迟时间（秒）
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*/
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public void setReconnectDelay(int reconnectDelay) {
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if (reconnectDelay > 0) {
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this.reconnectDelay = reconnectDelay;
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}
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}
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/**
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* 设置心跳间隔时间（秒）
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*/
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public void setHeartbeatInterval(int heartbeatInterval) {
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if (heartbeatInterval > 0) {
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this.heartbeatInterval = heartbeatInterval;
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}
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}
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}
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