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+package com.ydtech.modules.admin.controller.websocket;
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+
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+import com.github.pagehelper.PageInfo;
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+import com.google.gson.Gson;
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+import com.google.gson.JsonParser;
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+import com.ydtech.modules.message.entity.SystemMessage;
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+import com.ydtech.modules.message.entity.SystemMessageVo;
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+import com.ydtech.modules.message.entity.dto.SystemMessageDTO;
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+import com.ydtech.modules.message.service.SystemMessageService;
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+import com.ydtech.utils.StringUtils;
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+import org.springframework.beans.factory.annotation.Autowired;
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+import org.springframework.context.ApplicationContext;
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+import org.springframework.scheduling.annotation.Scheduled;
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+import org.springframework.stereotype.Component;
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+
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+import java.util.List;
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+import java.util.Map;
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+import java.util.concurrent.ConcurrentHashMap;
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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 com.alibaba.fastjson.JSON;
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+import com.alibaba.fastjson.JSONObject;
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+import cn.hutool.log.Log;
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+import cn.hutool.log.LogFactory;
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+
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+
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+@ServerEndpoint(value = "/getMessage/{userId}")
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+@Component
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+public class SendMessageServer {
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+
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+
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+ private static ApplicationContext applicationContext;
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+
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+ public static void setApplicationContext(ApplicationContext context) {
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+ applicationContext = context;
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+ }
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+
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+ static Log log = LogFactory.get(SendMessageServer.class);
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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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+ private static int onlineCount = 0;
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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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+ private static ConcurrentHashMap<String,SendMessageServer> webSocketMap = new ConcurrentHashMap<>();
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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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+ private Session session;
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+ /**接收userId*/
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+ private String userId="";
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+
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+ /**
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+ * 连接建立成功调用的方法*/
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+ @OnOpen
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+ public void onOpen(Session session, @PathParam("userId") String userId) {
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+ this.session = session;
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+ this.userId=userId;
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+ if(webSocketMap.containsKey(userId)){
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+ webSocketMap.remove(userId);
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+ webSocketMap.put(userId, this);
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+ //加入set中
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+ }else{
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+ webSocketMap.put(userId, this);
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+ //加入set中
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+ addOnlineCount();
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+ //在线数加1
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+ }
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+
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+ log.info("用户连接:"+userId+",当前在线人数为:" + getOnlineCount());
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+
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+ try {
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+ PageInfo<SystemMessageDTO> message = getMessage(userId);
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+ log.info("为用户" + userId + "连接建立成功发送站内信" + new Gson().toJson(message));
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+ sendMessage(new Gson().toJson(message));
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+ } catch (Exception e) {
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+ log.error("用户:"+userId+",网络异常!!!!!!");
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+ }
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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(webSocketMap.containsKey(userId)){
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+ webSocketMap.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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+ /**
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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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+ @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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+ //解析发送的报文
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+ JSONObject jsonObject = JSON.parseObject(message);
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+ //追加发送人(防止串改)
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+ jsonObject.put("fromUserId",this.userId);
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+ String toUserId=jsonObject.getString("userId");
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+
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+ //传送给对应toUserId用户的websocket
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+ if (StringUtils.isNotBlank(toUserId) && webSocketMap.containsKey(toUserId)) {
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+ PageInfo<SystemMessageDTO> getMessage = getMessage(toUserId);
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+ log.info("为用户" + toUserId + "登录或刷新发送站内信" + new Gson().toJson(getMessage));
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+ webSocketMap.get(toUserId).sendMessage(new Gson().toJson(getMessage));
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+ } else {
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+ log.error("请求的userId:"+toUserId+"不在该服务器上");
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+ //否则不在这个服务器上,发送到mysql或者redis
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+ }
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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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+ /**
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+ *
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+ * @param session
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+ * @param error
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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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+ 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 Exception {
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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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+ /**
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+ * 每小时发送站内信消息
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+ * */
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+// @Scheduled(cron = "0 * * * * *")
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+// public void fixedTime() throws Exception {
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+// log.info("定时任务发送站内信消息到:" + JSONObject.toJSONString(webSocketMap.keySet()));
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+// if (webSocketMap.size() > 0) {
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+// for (String userId : webSocketMap.keySet()) {
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+// PageInfo<SystemMessageDTO> message = getMessage(userId);
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+// log.info("定时任务发送站内信消息内容:" + JSONObject.toJSONString(message));
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+// webSocketMap.get(userId).sendMessage(new Gson().toJson(message));
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+// }
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+// }
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+// }
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+
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+
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+ public void realTime(List<SystemMessage> systemMessageList) throws Exception {
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+ log.info("实时发送站内信消息到:" + JSONObject.toJSONString(webSocketMap.keySet()));
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+ if (webSocketMap.size() > 0) {
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+ for (String userId : webSocketMap.keySet()) {
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+ for (SystemMessage systemMessage : systemMessageList) {
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+ if (userId.equals(systemMessage.getReceiverId())) {
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+ log.info("实时发送站内信消息内容:" + JSONObject.toJSONString(systemMessage));
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+ webSocketMap.get(userId).sendMessage(new Gson().toJson(systemMessage));
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+ }
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+ }
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+ }
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+ }
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+ }
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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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+
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+ public static synchronized void addOnlineCount() {
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+ SendMessageServer.onlineCount++;
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+ }
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+
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+ public static synchronized void subOnlineCount() {
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+ SendMessageServer.onlineCount--;
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+ }
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+
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+ public PageInfo<SystemMessageDTO> getMessage(String userId) {
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+ SystemMessageVo systemMessageVo = new SystemMessageVo();
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+ systemMessageVo.setUserId(userId);
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+ systemMessageVo.setPageNum(1);
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+ systemMessageVo.setPageSize(10);
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+ SystemMessageService socketTableConnService = applicationContext.getBean(SystemMessageService.class);
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+ PageInfo<SystemMessageDTO> systemMessageByUser = socketTableConnService.getSystemMessageByUser(systemMessageVo);
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+ return systemMessageByUser;
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+ }
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+
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+
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+}
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