package cn.iocoder.yudao.module.iot.service.rule.data.action;
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import cn.hutool.core.util.StrUtil;
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import cn.iocoder.yudao.module.iot.core.mq.message.IotDeviceMessage;
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import cn.iocoder.yudao.module.iot.dal.dataobject.rule.config.IotDataSinkWebSocketConfig;
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import cn.iocoder.yudao.module.iot.enums.rule.IotDataSinkTypeEnum;
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import cn.iocoder.yudao.module.iot.service.rule.data.action.websocket.IotWebSocketClient;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.stereotype.Component;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.locks.ReentrantLock;
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/**
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* WebSocket 的 {@link IotDataRuleAction} 实现类
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* <p>
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* 负责将设备消息发送到外部 WebSocket 服务器
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* 支持 ws:// 和 wss:// 协议,支持 JSON 和 TEXT 数据格式
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* 使用连接池管理 WebSocket 连接,提高性能和资源利用率
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*
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* @author HUIHUI
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*/
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@Component
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@Slf4j
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public class IotWebSocketDataRuleAction extends
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IotDataRuleCacheableAction<IotDataSinkWebSocketConfig, IotWebSocketClient> {
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/**
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* 锁等待超时时间(毫秒)
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*/
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private static final long LOCK_WAIT_TIME_MS = 5000;
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/**
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* 重连锁,key 为 WebSocket 服务器地址
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* <p>
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* WebSocket 连接是与特定服务器实例绑定的,使用单机锁即可保证重连的线程安全
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*/
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private final ConcurrentHashMap<String, ReentrantLock> reconnectLocks = new ConcurrentHashMap<>();
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@Override
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public Integer getType() {
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return IotDataSinkTypeEnum.WEBSOCKET.getType();
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}
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@Override
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protected IotWebSocketClient initProducer(IotDataSinkWebSocketConfig config) throws Exception {
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// 1. 参数校验
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if (StrUtil.isBlank(config.getServerUrl())) {
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throw new IllegalArgumentException("WebSocket 服务器地址不能为空");
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}
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if (!StrUtil.startWithAny(config.getServerUrl(), "ws://", "wss://")) {
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throw new IllegalArgumentException("WebSocket 服务器地址必须以 ws:// 或 wss:// 开头");
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}
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// 2.1 创建 WebSocket 客户端
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IotWebSocketClient webSocketClient = new IotWebSocketClient(
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config.getServerUrl(),
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config.getConnectTimeoutMs(),
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config.getSendTimeoutMs(),
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config.getDataFormat()
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);
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// 2.2 连接服务器
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webSocketClient.connect();
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log.info("[initProducer][WebSocket 客户端创建并连接成功,服务器: {},数据格式: {}]",
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config.getServerUrl(), config.getDataFormat());
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return webSocketClient;
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}
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@Override
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protected void closeProducer(IotWebSocketClient producer) throws Exception {
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if (producer != null) {
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producer.close();
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}
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}
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@Override
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protected void execute(IotDeviceMessage message, IotDataSinkWebSocketConfig config) throws Exception {
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try {
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// 1.1 获取或创建 WebSocket 客户端
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IotWebSocketClient webSocketClient = getProducer(config);
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// 1.2 检查连接状态,如果断开则使用分布式锁保证重连的线程安全
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if (!webSocketClient.isConnected()) {
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reconnectWithLock(webSocketClient, config);
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}
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// 2.1 发送消息
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webSocketClient.sendMessage(message);
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// 2.2 记录发送成功日志
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log.info("[execute][message({}) config({}) 发送成功,WebSocket 服务器: {}]",
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message, config, config.getServerUrl());
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} catch (Exception e) {
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log.error("[execute][message({}) config({}) 发送失败,WebSocket 服务器: {}]",
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message, config, config.getServerUrl(), e);
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throw e;
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}
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}
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/**
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* 使用锁进行重连,保证同一服务器地址的重连操作线程安全
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*
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* 加锁原因:多线程并发发送消息时,多个线程可能同时检测到连接断开并尝试重连,使用锁 + 双重检查保证同一服务器地址只有一个线程执行重连操作
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*
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* @param webSocketClient WebSocket 客户端
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* @param config 配置信息
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*/
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private void reconnectWithLock(IotWebSocketClient webSocketClient, IotDataSinkWebSocketConfig config) throws Exception {
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ReentrantLock lock = reconnectLocks.computeIfAbsent(config.getServerUrl(), k -> new ReentrantLock());
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boolean acquired = false;
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try {
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acquired = lock.tryLock(LOCK_WAIT_TIME_MS, TimeUnit.MILLISECONDS);
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if (!acquired) {
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throw new RuntimeException("获取 WebSocket 重连锁超时,服务器: " + config.getServerUrl());
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}
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// 双重检查:获取锁后再次检查连接状态,避免重复连接
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if (!webSocketClient.isConnected()) {
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log.warn("[reconnectWithLock][WebSocket 连接已断开,尝试重新连接,服务器: {}]", config.getServerUrl());
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webSocketClient.connect();
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}
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} catch (InterruptedException e) {
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Thread.currentThread().interrupt();
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throw new RuntimeException("获取 WebSocket 重连锁被中断,服务器: " + config.getServerUrl(), e);
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} finally {
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if (acquired && lock.isHeldByCurrentThread()) {
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lock.unlock();
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}
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}
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}
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}
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