package cn.iocoder.yudao.module.iot.gateway.protocol.udp;
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import cn.hutool.extra.spring.SpringUtil;
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import cn.iocoder.yudao.module.iot.core.enums.IotProtocolTypeEnum;
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import cn.iocoder.yudao.module.iot.core.enums.IotSerializeTypeEnum;
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import cn.iocoder.yudao.module.iot.core.messagebus.core.IotMessageBus;
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import cn.iocoder.yudao.module.iot.gateway.config.IotGatewayProperties.ProtocolProperties;
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import cn.iocoder.yudao.module.iot.gateway.protocol.IotProtocol;
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import cn.iocoder.yudao.module.iot.gateway.protocol.udp.handler.downstream.IotUdpDownstreamHandler;
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import cn.iocoder.yudao.module.iot.gateway.protocol.udp.handler.downstream.IotUdpDownstreamSubscriber;
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import cn.iocoder.yudao.module.iot.gateway.protocol.udp.handler.upstream.IotUdpUpstreamHandler;
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import cn.iocoder.yudao.module.iot.gateway.protocol.udp.manager.IotUdpSessionManager;
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import cn.iocoder.yudao.module.iot.gateway.serialize.IotMessageSerializer;
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import cn.iocoder.yudao.module.iot.gateway.serialize.IotMessageSerializerManager;
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import cn.iocoder.yudao.module.iot.core.util.IotDeviceMessageUtils;
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import io.vertx.core.Vertx;
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import io.vertx.core.datagram.DatagramSocket;
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import io.vertx.core.datagram.DatagramSocketOptions;
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import lombok.Getter;
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import lombok.extern.slf4j.Slf4j;
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import cn.hutool.core.lang.Assert;
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/**
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* IoT UDP 协议实现
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* <p>
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* 基于 Vert.x 实现 UDP 服务器，接收设备上行消息
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*
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* @author 芋道源码
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*/
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@Slf4j
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public class IotUdpProtocol implements IotProtocol {
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/**
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* 协议配置
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*/
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private final ProtocolProperties properties;
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/**
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* 服务器 ID（用于消息追踪，全局唯一）
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*/
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@Getter
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private final String serverId;
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/**
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* 运行状态
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*/
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@Getter
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private volatile boolean running = false;
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/**
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* Vert.x 实例
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*/
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private Vertx vertx;
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/**
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* UDP 服务器
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*/
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@Getter
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private DatagramSocket udpSocket;
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/**
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* UDP 会话管理器
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*/
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private final IotUdpSessionManager sessionManager;
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/**
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* 下行消息订阅者
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*/
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private IotUdpDownstreamSubscriber downstreamSubscriber;
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/**
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* 消息序列化器
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*/
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private final IotMessageSerializer serializer;
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public IotUdpProtocol(ProtocolProperties properties) {
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IotUdpConfig udpConfig = properties.getUdp();
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Assert.notNull(udpConfig, "UDP 协议配置（udp）不能为空");
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this.properties = properties;
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this.serverId = IotDeviceMessageUtils.generateServerId(properties.getPort());
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// 初始化序列化器
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IotSerializeTypeEnum serializeType = IotSerializeTypeEnum.of(properties.getSerialize());
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Assert.notNull(serializeType, "不支持的序列化类型：" + properties.getSerialize());
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IotMessageSerializerManager serializerManager = SpringUtil.getBean(IotMessageSerializerManager.class);
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this.serializer = serializerManager.get(serializeType);
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// 初始化会话管理器
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this.sessionManager = new IotUdpSessionManager(udpConfig.getMaxSessions(), udpConfig.getSessionTimeoutMs());
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}
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@Override
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public String getId() {
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return properties.getId();
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}
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@Override
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public IotProtocolTypeEnum getType() {
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return IotProtocolTypeEnum.UDP;
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}
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@Override
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public void start() {
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if (running) {
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log.warn("[start][IoT UDP 协议 {} 已经在运行中]", getId());
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return;
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}
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// 1.1 创建 Vertx 实例 和 下行消息订阅者
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this.vertx = Vertx.vertx();
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IotMessageBus messageBus = SpringUtil.getBean(IotMessageBus.class);
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IotUdpDownstreamHandler downstreamHandler = new IotUdpDownstreamHandler(this, sessionManager, serializer);
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this.downstreamSubscriber = new IotUdpDownstreamSubscriber(this, downstreamHandler, messageBus);
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// 1.2 创建 UDP Socket 选项
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IotUdpConfig udpConfig = properties.getUdp();
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DatagramSocketOptions options = new DatagramSocketOptions()
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.setReceiveBufferSize(udpConfig.getReceiveBufferSize())
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.setSendBufferSize(udpConfig.getSendBufferSize())
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.setReuseAddress(true);
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// 1.3 创建 UDP Socket
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udpSocket = vertx.createDatagramSocket(options);
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// 1.4 创建上行消息处理器
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IotUdpUpstreamHandler upstreamHandler = new IotUdpUpstreamHandler(serverId, sessionManager, serializer);
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// 1.5 启动 UDP 服务器（阻塞式）
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try {
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udpSocket.listen(properties.getPort(), "0.0.0.0").result();
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// 设置数据包处理器
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udpSocket.handler(packet -> upstreamHandler.handle(packet, udpSocket));
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running = true;
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log.info("[start][IoT UDP 协议 {} 启动成功，端口：{}，serverId：{}]",
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getId(), properties.getPort(), serverId);
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// 2. 启动下行消息订阅者
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this.downstreamSubscriber.start();
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} catch (Exception e) {
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log.error("[start][IoT UDP 协议 {} 启动失败]", getId(), e);
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stop0();
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throw e;
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}
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}
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@Override
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public void stop() {
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if (!running) {
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return;
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}
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stop0();
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}
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private void stop0() {
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// 1. 停止下行消息订阅者
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if (downstreamSubscriber != null) {
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try {
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downstreamSubscriber.stop();
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log.info("[stop][IoT UDP 协议 {} 下行消息订阅者已停止]", getId());
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} catch (Exception e) {
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log.error("[stop][IoT UDP 协议 {} 下行消息订阅者停止失败]", getId(), e);
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}
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downstreamSubscriber = null;
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}
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// 2.1 关闭 UDP Socket
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if (udpSocket != null) {
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try {
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udpSocket.close().result();
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log.info("[stop][IoT UDP 协议 {} 服务器已停止]", getId());
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} catch (Exception e) {
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log.error("[stop][IoT UDP 协议 {} 服务器停止失败]", getId(), e);
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}
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udpSocket = null;
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}
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// 2.2 关闭 Vertx 实例
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if (vertx != null) {
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try {
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vertx.close().result();
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log.info("[stop][IoT UDP 协议 {} Vertx 已关闭]", getId());
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} catch (Exception e) {
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log.error("[stop][IoT UDP 协议 {} Vertx 关闭失败]", getId(), e);
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}
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vertx = null;
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}
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running = false;
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log.info("[stop][IoT UDP 协议 {} 已停止]", getId());
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}
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}
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