优化 停车场 ws

service-api/src/main/java/com/java110/api/websocket/ParkingAreaWebsocket.java

@@ -0,0 +1,169 @@
+package com.java110.api.websocket;
+
+import com.alibaba.fastjson.JSONObject;
+import com.java110.dto.WsDataDto;
+import com.java110.utils.util.StringUtil;
+import com.java110.vo.ResultVo;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
+
+import javax.websocket.*;
+import javax.websocket.server.PathParam;
+import javax.websocket.server.ServerEndpoint;
+import java.io.IOException;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * @ClassName 停车场 ws
+ * @Description TODO
+ * @Author wuxw
+ * @Date 2020/5/25 12:13
+ * @Version 1.0
+ * add by wuxw 2020/5/25
+ **/
+@ServerEndpoint("/ws/parkingArea/{paId}/{clientId}")
+@Component
+public class ParkingAreaWebsocket {
+
+    private static Logger logger = LoggerFactory.getLogger(ParkingAreaWebsocket.class);
+
+    /**
+     * 静态变量，用来记录当前在线连接数。应该把它设计成线程安全的。
+     */
+    private static int onlineCount = 0;
+    /**
+     * concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
+     */
+    private static ConcurrentHashMap<String, ParkingAreaWebsocket> webSocketMap = new ConcurrentHashMap<>();
+
+    /**
+     * concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
+     */
+    private static ConcurrentHashMap<String, String> clientMachineMap = new ConcurrentHashMap<>();
+    /**
+     * 与某个客户端的连接会话，需要通过它来给客户端发送数据
+     */
+    private Session session;
+    /**
+     * 接收clientId
+     */
+    private String clientId = "";
+
+    private String paId = "";
+
+    /**
+     * 连接建立成功调用的方法
+     */
+    @OnOpen
+    public void onOpen(Session session, @PathParam("clientId") String clientId, @PathParam("paId") String paId) {
+        this.session = session;
+        this.clientId = clientId;
+        this.paId = paId;
+        if (webSocketMap.containsKey(clientId)) {
+            webSocketMap.remove(clientId);
+            webSocketMap.put(clientId, this);
+            //加入set中
+        } else {
+            webSocketMap.put(clientId, this);
+            //加入set中
+            addOnlineCount();
+            //在线数加1
+        }
+
+
+        logger.debug("用户连接:" + clientId + ",当前在线人数为:" + getOnlineCount());
+
+        try {
+            sendMessage("连接成功");
+        } catch (IOException e) {
+            logger.error("用户:" + clientId + ",网络异常!!!!!!");
+        }
+    }
+
+    /**
+     * 连接关闭调用的方法
+     */
+    @OnClose
+    public void onClose() {
+        if (webSocketMap.containsKey(clientId)) {
+            webSocketMap.remove(clientId);
+            //从set中删除
+            subOnlineCount();
+        }
+        logger.info("用户退出:" + clientId + ",当前在线人数为:" + getOnlineCount());
+    }
+
+    /**
+     * 收到客户端消息后调用的方法
+     *
+     * @param message 客户端发送过来的消息
+     */
+    @OnMessage
+    public void onMessage(String message, Session session) throws Exception {
+        logger.info("用户消息:" + paId + ",客户端：" + clientId + ",报文:" + message);
+        //可以群发消息
+        //消息保存到数据库、redis
+        if (StringUtil.isEmpty(message)) {
+            ResultVo resultVo = new ResultVo(ResultVo.CODE_ERROR, "未包含内容");
+            webSocketMap.get(clientId).sendMessage(resultVo.toString());
+            return;
+        }
+
+        if (!StringUtil.isJsonObject(message)) {
+            ResultVo resultVo = new ResultVo(ResultVo.CODE_ERROR, "不是有效数据格式");
+            webSocketMap.get(clientId).sendMessage(resultVo.toString());
+            return;
+        }
+
+        WsDataDto wsDataDto = JSONObject.parseObject(message, WsDataDto.class);
+
+        switch (wsDataDto.getCmd()) {
+            case WsDataDto.CMD_PING:
+                //webSocketMap.get(userId).sendMessage(wsDataDto.toString());
+                break;
+        }
+    }
+
+    /**
+     * @param session
+     * @param error
+     */
+    @OnError
+    public void onError(Session session, Throwable error) {
+        logger.error("用户错误:" + this.clientId + ",原因:" + error.getMessage());
+        error.printStackTrace();
+    }
+
+    /**
+     * 实现服务器主动推送
+     */
+    public void sendMessage(String message) throws IOException {
+        this.session.getBasicRemote().sendText(message);
+    }
+
+
+    /**
+     * 发送设备监控信息
+     */
+    public static void sendInfo(String message, String paId) throws IOException {
+        logger.info("发送消息到:" + paId + "，报文:" + message);
+        for (ParkingAreaWebsocket server : webSocketMap.values()) {
+            if (paId.equals(server.paId)) {
+                webSocketMap.get(server.clientId).sendMessage(message);
+            }
+        }
+    }
+
+    public static synchronized int getOnlineCount() {
+        return onlineCount;
+    }
+
+    public static synchronized void addOnlineCount() {
+        ParkingAreaWebsocket.onlineCount++;
+    }
+
+    public static synchronized void subOnlineCount() {
+        ParkingAreaWebsocket.onlineCount--;
+    }
+}