package com.ruoyi.admin.sorcket;
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import cn.hutool.log.Log;
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import cn.hutool.log.LogFactory;
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import com.ruoyi.common.core.utils.StringUtils;
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import org.springframework.stereotype.Component;
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import javax.websocket.*;
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import javax.websocket.server.PathParam;
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import javax.websocket.server.ServerEndpoint;
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import java.io.IOException;
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import java.util.concurrent.ConcurrentHashMap;
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/**
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* @author hjl
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*/
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@ServerEndpoint(value = "/websocket/{workerId}")
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@Component
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public class WebSocketServer {
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static Log log = LogFactory.get(WebSocketServer.class);
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/**
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* 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。
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*/
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private static int onlineCount = 0;
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/**
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* concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象
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*/
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private static final ConcurrentHashMap<String, WebSocketClient> WEB_SOCKET_MAP = new ConcurrentHashMap<>();
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/**
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* 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
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*/
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private Session session;
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/**
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* 接收userId
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*/
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private String userId = "";
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/**
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* 连接建立成功调用的方法
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*/
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@OnOpen
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public void onOpen(Session session, @PathParam("workerId") String workerId) {
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this.session = session;
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this.userId = workerId;
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if (WEB_SOCKET_MAP.containsKey(workerId)) {
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WEB_SOCKET_MAP.remove(workerId);
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WEB_SOCKET_MAP.put(workerId, new WebSocketClient(session, workerId));
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//加入set中
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} else {
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WEB_SOCKET_MAP.put(workerId, new WebSocketClient(session, workerId));
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//加入set中
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addOnlineCount();
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}
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log.info("用户 " + workerId + " 已连接: 当前在线人数为:" + getOnlineCount());
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try {
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sendMessage("socket连接成功！");
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} catch (IOException e) {
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log.error("用户:" + workerId + ",网络异常!!!!!!");
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}
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}
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/**
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* 连接关闭调用的方法
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*/
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@OnClose
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public void onClose() {
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if (WEB_SOCKET_MAP.containsKey(userId)) {
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WEB_SOCKET_MAP.remove(userId);
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//从set中删除
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subOnlineCount();
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}
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log.info("用户退出: " + userId + ",当前在线人数为: " + getOnlineCount());
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}
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/**
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* 收到客户端消息后调用的方法
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*
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* @param message 客户端发送过来的消息
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*/
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@OnMessage
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public void onMessage(String message, Session session) {
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log.info("用户消息:" + userId + ",报文:" + message);
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//可以群发消息
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//消息保存到数据库、redis
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if (StringUtils.isNotBlank(message)) {
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try {
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log.info("请求的userId:" + this.userId + "；接收消息:" + message);
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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}
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/**
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* @param session 客户端连接
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* @param error 错误原因
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*/
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@OnError
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public void onError(Session session, Throwable error) {
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log.error("用户错误:" + this.userId + ",原因:" + error.getMessage());
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if (WEB_SOCKET_MAP.containsKey(userId)) {
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WEB_SOCKET_MAP.remove(userId);
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//从set中删除
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subOnlineCount();
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}
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error.printStackTrace();
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}
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/**
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* 实现服务器主动推送
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*/
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public void sendMessage(String message) throws IOException {
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synchronized (this.session) {
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this.session.getBasicRemote().sendText(message);
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}
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}
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/**
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* 发送自定义消息
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*/
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public static void sendInfo(String message, @PathParam("workerId") String workerId) throws IOException {
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log.info("发送消息到:" + workerId + "，报文:" + message);
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if (StringUtils.isNotBlank(workerId) && WEB_SOCKET_MAP.containsKey(workerId)) {
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WEB_SOCKET_MAP.get(workerId).getSession().getBasicRemote().sendText(message);
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} else {
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log.error("用户" + workerId + ",不在线！");
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}
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}
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public static synchronized int getOnlineCount() {
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return onlineCount;
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}
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public static synchronized void addOnlineCount() {
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WebSocketServer.onlineCount++;
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}
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public static synchronized void subOnlineCount() {
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WebSocketServer.onlineCount--;
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}
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}
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