From 99b201ea344b2b21efebb6bf8b72397714288783 Mon Sep 17 00:00:00 2001
From: liusuyi <1951119284@qq.com>
Date: Mon, 10 Mar 2025 13:15:19 +0800
Subject: [PATCH] 增加websocket状态管理用来推送
---
ard-work/src/main/java/com/ard/tianyu/websocket/handler/UavStateManager.java | 156 +++++++++++++++++++++++++++++++
ard-work/src/main/java/com/ard/tianyu/websocket/handler/UavStreamManager.java | 2
ard-work/src/main/java/com/ard/tianyu/websocket/domain/UavStateMessage.java | 36 +++++++
ard-work/src/main/java/com/ard/tianyu/websocket/handler/TyMessageHandler.java | 98 +++++++++++++++----
4 files changed, 269 insertions(+), 23 deletions(-)
diff --git a/ard-work/src/main/java/com/ard/tianyu/websocket/domain/UavStateMessage.java b/ard-work/src/main/java/com/ard/tianyu/websocket/domain/UavStateMessage.java
new file mode 100644
index 0000000..da534c3
--- /dev/null
+++ b/ard-work/src/main/java/com/ard/tianyu/websocket/domain/UavStateMessage.java
@@ -0,0 +1,36 @@
+package com.ard.tianyu.websocket.domain;
+
+import com.ard.tianyu.domain.dto.state.UavState;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+/**
+ * Description: 无人机状态消息
+ * Author: liusuyi
+ * Date: 2025年03月10日11:49
+ **/
+@Data
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class UavStateMessage {
+
+ /**
+ * 盒子编号
+ */
+ private String boxSn;
+
+ /**
+ * 无人机状态
+ */
+ private UavState uavState;
+
+
+ /**
+ * 是否订阅
+ */
+ private Boolean subscribe;
+
+}
diff --git a/ard-work/src/main/java/com/ard/tianyu/websocket/handler/TyMessageHandler.java b/ard-work/src/main/java/com/ard/tianyu/websocket/handler/TyMessageHandler.java
index b74d892..7da65b5 100644
--- a/ard-work/src/main/java/com/ard/tianyu/websocket/handler/TyMessageHandler.java
+++ b/ard-work/src/main/java/com/ard/tianyu/websocket/handler/TyMessageHandler.java
@@ -3,9 +3,9 @@
import com.alibaba.fastjson2.JSON;
import com.alibaba.fastjson2.TypeReference;
import com.ard.tianyu.service.control.UavControlService;
-import com.ard.tianyu.service.stream.UavStreamManager;
import com.ard.tianyu.websocket.domain.BaseMessage;
import com.ard.tianyu.websocket.domain.UavStreamMessage;
+import com.ard.tianyu.websocket.domain.UavStateMessage;
import com.ard.tianyu.websocket.utils.WebSocketUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
@@ -13,7 +13,6 @@
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.handler.TextWebSocketHandler;
-
import javax.annotation.Resource;
@@ -25,57 +24,112 @@
private UavStreamManager uavStreamManager;
@Resource
private UavControlService uavControlService;
+ @Resource
+ private UavStateManager uavStateManager;
+
@Override
public void handleTextMessage(WebSocketSession session, TextMessage message) {
- // 处理接收到的消息
- String userIdStr = (String) session.getAttributes().get("userId");
+ String userIdStr = (String) session.getAttributes().get("userId");
Long userId = Long.parseLong(userIdStr);
String payload = message.getPayload();
log.info("【cmd】Received message: {}", payload);
log.info("【cmd】size: {}", WebSocketUtil.ONLINE_USER_SESSIONS.size());
+
BaseMessage<?> baseMessage = JSON.parseObject(payload, BaseMessage.class);
switch (baseMessage.getType()) {
case "stream":
- BaseMessage<UavStreamMessage> streamMessage = JSON.parseObject(payload,
- new TypeReference<BaseMessage<UavStreamMessage>>() {
- });
- UavStreamMessage uavStreamMessage = streamMessage.getPayload();
- if (uavStreamMessage != null) {
- String boxSn = uavStreamMessage.getBoxSn();
- if (uavStreamMessage.getPullType().equals(1)) {
- uavStreamManager.startPullStream(boxSn, userId);
- } else {
- uavStreamManager.stopPullStream(boxSn, userId);
- }
- }
+ handleStreamMessage(payload, userId);
+ break;
+ case "state":
+ handleStateMessage(payload, userId);
break;
}
-
}
+
+ /**
+ * 处理流消息
+ * <p>
+ * 该方法解析给定的负载数据，以获取无人机流消息，并根据消息类型决定是否开始或停止流
+ *
+ * @param payload 消息的负载数据，通常为JSON字符串
+ * @param userId 接收消息的用户ID
+ */
+ private void handleStreamMessage(String payload, Long userId) {
+ // 解析JSON负载数据为BaseMessage对象，包含UavStreamMessage类型的有效载荷
+ BaseMessage<UavStreamMessage> streamMessage = JSON.parseObject(payload,
+ new TypeReference<BaseMessage<UavStreamMessage>>() {
+ });
+ UavStreamMessage uavStreamMessage = streamMessage.getPayload();
+
+ // 检查解析后的UavStreamMessage对象是否非空
+ if (uavStreamMessage != null) {
+ String boxSn = uavStreamMessage.getBoxSn();
+
+ // 根据pullType决定操作类型：1表示开始流，其他值表示停止流
+ if (uavStreamMessage.getPullType().equals(1)) {
+ uavStreamManager.startPullStream(boxSn, userId);
+ } else {
+ uavStreamManager.stopPullStream(boxSn, userId);
+ }
+ }
+ }
+
+ /**
+ * 处理状态消息
+ * 根据接收到的消息内容，决定无人机状态信息的订阅或退订
+ *
+ * @param payload 消息负载，包含订阅信息
+ * @param userId 用户ID，用于标识用户
+ */
+ private void handleStateMessage(String payload, Long userId) {
+ // 解析接收到的JSON消息，将其转换为BaseMessage对象
+ BaseMessage<UavStateMessage> stateMessage = JSON.parseObject(payload,
+ new TypeReference<BaseMessage<UavStateMessage>>() {
+ });
+ // 获取消息的有效载荷部分
+ UavStateMessage uavStateMessage = stateMessage.getPayload();
+
+ // 检查有效载荷是否存在
+ if (uavStateMessage != null) {
+ // 获取无人机盒子的序列号
+ String boxSn = uavStateMessage.getBoxSn();
+ // 根据消息中的订阅标志，决定是订阅还是退订无人机状态
+ Boolean subscribe = uavStateMessage.getSubscribe();
+ if (subscribe) {
+ // 执行订阅操作
+ uavStateManager.subscribeState(boxSn, userId);
+ } else {
+ // 执行退订操作
+ uavStateManager.unsubscribeState(boxSn, userId);
+ }
+ }
+ }
+
@Override
public void afterConnectionEstablished(WebSocketSession session) {
log.info("【cmd】Connected: {}", session.getId());
- String userIdStr = (String) session.getAttributes().get("userId");
+ String userIdStr = (String) session.getAttributes().get("userId");
Long userId = Long.parseLong(userIdStr);
WebSocketUtil.ONLINE_USER_SESSIONS.put(userId, session);
log.info("【cmd】size: {}", WebSocketUtil.ONLINE_USER_SESSIONS.size());
-
}
@Override
public void afterConnectionClosed(WebSocketSession session, CloseStatus status) {
log.info("【cmd】Disconnected: {}", session.getId());
- String userIdStr = (String) session.getAttributes().get("userId");
+ String userIdStr = (String) session.getAttributes().get("userId");
Long userId = Long.parseLong(userIdStr);
WebSocketUtil.ONLINE_USER_SESSIONS.remove(userId);
log.info("【cmd】size: {}", WebSocketUtil.ONLINE_USER_SESSIONS.size());
- //停止用户的所有流
+ // 停止用户的所有流
uavStreamManager.stopAllPullStreamByUser(userId);
if (userId != null) {
// 释放该用户所有 UAV 控制权
uavControlService.releaseAllControls(userId);
}
+
+ uavStateManager.removeSubscribeState(userId);
}
-}
\ No newline at end of file
+}
diff --git a/ard-work/src/main/java/com/ard/tianyu/websocket/handler/UavStateManager.java b/ard-work/src/main/java/com/ard/tianyu/websocket/handler/UavStateManager.java
new file mode 100644
index 0000000..f548e9e
--- /dev/null
+++ b/ard-work/src/main/java/com/ard/tianyu/websocket/handler/UavStateManager.java
@@ -0,0 +1,156 @@
+package com.ard.tianyu.websocket.handler;
+
+import com.alibaba.fastjson2.JSON;
+import com.alibaba.fastjson2.JSONObject;
+import com.ard.tianyu.domain.cache.UavStateCache;
+import com.ard.tianyu.domain.dto.state.UavState;
+import com.ard.tianyu.websocket.utils.WebSocketUtil;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Component;
+import org.springframework.web.socket.TextMessage;
+import org.springframework.web.socket.WebSocketSession;
+
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.*;
+
+/**
+ * Description: 无人机状态管理
+ * Author: liusuyi
+ * Date: 2025年03月10日11:54
+ **/
+@Slf4j
+@Component
+public class UavStateManager {
+
+ // 存储状态订阅的用户
+ private static final Map<String, Set<Long>> stateSubscriptions = new ConcurrentHashMap<>();
+ // 定时任务调度器
+ private static final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(1);
+ // 存储状态推送任务
+ private static final Map<String, ScheduledFuture<?>> statePushTasks = new ConcurrentHashMap<>();
+
+
+ /**
+ * 订阅指定设备的状态
+ * 当用户需要接收特定设备的状态更新时调用此方法
+ * 如果这是第一次订阅该设备，此方法还将启动一个定时任务来推送设备状态
+ *
+ * @param boxSn 设备的序列号，用于唯一标识设备
+ * @param userId 用户ID，表示谁订阅了设备状态
+ */
+ public void subscribeState(String boxSn, Long userId) {
+ // 向订阅列表中添加该session
+ stateSubscriptions.computeIfAbsent(boxSn, k -> new HashSet<>()).add(userId);
+
+ // 如果是第一次订阅该无人机的状态，启动定时任务
+ if (stateSubscriptions.get(boxSn).size() == 1) {
+ startStatePushTask(boxSn);
+ }
+ }
+
+ /**
+ * 取消用户对指定设备状态的订阅
+ * <p>
+ * 当用户不再需要接收特定设备的状态更新时，通过此方法取消订阅这会从设备的订阅者集合中移除当前用户如果该设备没有其他订阅者，
+ * 还将停止与该设备状态推送相关的定时任务
+ *
+ * @param boxSn 设备序列号，用于唯一标识一个设备
+ * @param userId 用户ID，表示要取消订阅的用户
+ */
+ public void unsubscribeState(String boxSn, Long userId) {
+ // 获取指定设备的所有订阅者集合
+ Set<Long> userIds = stateSubscriptions.get(boxSn);
+ if (userIds != null) {
+ // 从订阅者集合中移除当前会话
+ userIds.remove(userId);
+
+ // 如果没有用户再订阅该状态，停止定时任务
+ if (userIds.isEmpty()) {
+ stopStatePushTask(boxSn);
+ }
+ }
+ }
+
+ /**
+ * 启动状态推送任务
+ * 该方法用于为特定的无人机（通过boxSn标识）启动一个定时任务，定时任务将定期推送无人机的状态
+ *
+ * @param boxSn 无人机的序列号，用于唯一标识无人机
+ */
+ private void startStatePushTask(String boxSn) {
+ // 启动定时任务，每隔一定时间推送一次状态
+ ScheduledFuture<?> future = scheduler.scheduleAtFixedRate(() -> {
+ // 推送无人机状态到订阅者
+ sendDroneStateToSubscribers(boxSn);
+ }, 0, 2, TimeUnit.SECONDS); // 每2秒推送一次状态
+ // 将推送任务与无人机序列号关联，以便后续可能的管理或取消
+ statePushTasks.put(boxSn, future);
+ }
+
+ /**
+ * 停止并移除与指定盒子SN关联的状态推送定时任务
+ *
+ * @param boxSn 盒子的唯一序列号，用于标识特定的定时任务
+ */
+ private void stopStatePushTask(String boxSn) {
+ // 停止定时任务
+ ScheduledFuture<?> future = statePushTasks.get(boxSn);
+ if (future != null) {
+ // 如果任务存在，则取消任务，参数false表示不中断正在执行的任务
+ future.cancel(false);
+ }
+ // 从任务集合中移除与该盒子SN关联的任务
+ statePushTasks.remove(boxSn);
+ }
+
+ /**
+ * 移除用户订阅的状态
+ *
+ * @param userId 用户ID
+ */
+ public void removeSubscribeState(Long userId) {
+ // 清理掉该用户订阅的状态
+ for (Set<Long> userIds : stateSubscriptions.values()) {
+ userIds.remove(userId);
+ }
+ }
+
+ /**
+ * 向订阅者发送无人机状态信息
+ *
+ * @param boxSn 无人机的序列号，用于标识特定的无人机
+ * <p>
+ * 此方法首先调用getDroneState方法获取指定无人机的当前状态，然后通过WebSocket向所有订阅该无人机状态的客户端发送状态信息
+ * 如果在发送过程中遇到异常，则记录错误日志，包括会话ID和异常信息
+ */
+ private void sendDroneStateToSubscribers(String boxSn) {
+ // 获取当前无人机状态
+ UavState uavState = getDroneState(boxSn);
+ // 向所有订阅者推送状态
+ Set<Long> userIds = stateSubscriptions.get(boxSn);
+ if (userIds != null) {
+ for (Long userId : userIds) {
+ try {
+ WebSocketUtil.sendMessage(userId, JSON.toJSONString(uavState));
+ } catch (Exception e) {
+ log.error("Error sending state message to session {}", userId, e);
+ }
+ }
+ }
+ }
+
+ /**
+ * 获取无人机的状态信息
+ * 此方法通过传入的无人机序列号（boxSn）来获取无人机的当前状态
+ * 它主要起到了解无人机实时状态的作用，以便于进一步的控制或显示状态信息
+ *
+ * @param boxSn 无人机的唯一序列号，用于标识特定的无人机
+ * @return UavState 无人机的状态对象，包含各种状态信息如电池电量、飞行高度等
+ */
+ private UavState getDroneState(String boxSn) {
+ // 假设这里是获取无人机状态的逻辑，返回状态信息
+ return UavStateCache.getUavState(boxSn);
+ }
+}
diff --git a/ard-work/src/main/java/com/ard/tianyu/service/stream/UavStreamManager.java b/ard-work/src/main/java/com/ard/tianyu/websocket/handler/UavStreamManager.java
similarity index 98%
rename from ard-work/src/main/java/com/ard/tianyu/service/stream/UavStreamManager.java
rename to ard-work/src/main/java/com/ard/tianyu/websocket/handler/UavStreamManager.java
index 33d5550..308b47a 100644
--- a/ard-work/src/main/java/com/ard/tianyu/service/stream/UavStreamManager.java
+++ b/ard-work/src/main/java/com/ard/tianyu/websocket/handler/UavStreamManager.java
@@ -1,4 +1,4 @@
-package com.ard.tianyu.service.stream;
+package com.ard.tianyu.websocket.handler;
import com.ard.tianyu.domain.receiver.BoxStreamUrlReceiver;
import com.ard.tianyu.service.ITyService;
--
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