WebSocket消息推送

创建WebSocket工具类

package org.jmis.riskassess.config;

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.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArraySet;
@Component
@ServerEndpoint(value = "/message-service")
public class WebSocketUtil {

	private static final ConcurrentHashMap sessions = new ConcurrentHashMap<>();
	private static final Logger logger = LoggerFactory.getLogger(WebSocketUtil.class);

	public static void pushMessage(String userId, String message) {
		Session session = sessions.get(userId);
		if (session != null && session.isOpen()) {
			try {
				session.getBasicRemote().sendText(message);
			} catch (IOException e) {
				logger.error("Failed to send message to userId: " + userId, e);
			}
		} else {
			// 会话失效，从会话集合中移除
			sessions.remove(userId, session);
//			logger.warn("Session is invalid for userId: " + userId + ", removing from sessions");
		}
	}


	@OnOpen
	public void onOpen(Session session, EndpointConfig config) {
		Map> queryParams = session.getRequestParameterMap();
		String userId = queryParams.get("userId").get(0);
		sessions.put(userId, session);
		logger.info("WebSocket opened: " + session.getId() + ", userId: " + userId);
	}

	@OnClose
	public void onClose(Session session) {
		String closedSessionId = session.getId();
		sessions.entrySet().removeIf(entry -> entry.getValue().getId().equals(closedSessionId));
		logger.info("WebSocket closed: " + closedSessionId);
	}

	@OnMessage
	public void onMessage(String message, Session session) {
		String userId = (String) session.getUserProperties().get("userId");
		if (userId == null) {
			session.getUserProperties().put("userId", message);
			logger.info("User ID saved: " + message);
		}
	}
	public static int getSessionCount() {
		return sessions.size();
	}

	public static int getOpenConnectionCount() {
		int openConnectionCount = 0;
		for (Session session : sessions.values()) {
			if (session.isOpen()) {
				openConnectionCount++;
			}
		}
		return openConnectionCount;
	}

	public static List getOpenConnections() {
		List openConnections = new ArrayList<>();
		for (Session session : sessions.values()) {
			if (session.isOpen()) {
				openConnections.add(session);
			}
		}
		return openConnections;
	}
}

创建WebSocket配置文件

package org.jmis.riskassess.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;


@Configuration
public class WebSocketConfig {
	@Bean
	public ServerEndpointExporter serverEndpointExporter() {
		return new ServerEndpointExporter();
	}
}

业务逻辑

package org.jmis.riskassess.safeSystemDataTask;

import cn.hutool.core.collection.CollectionUtil;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.conditions.Wrapper;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.jmis.riskassess.config.WebSocketUtil;
import org.jmis.riskassess.entity.Message;
import org.jmis.riskassess.entity.MessageUser;
import org.jmis.riskassess.pojo.MessageInfo;
import org.jmis.riskassess.pojo.MineFoundation;
import org.jmis.riskassess.service.IMessageService;
import org.jmis.riskassess.service.IMessageUserService;
import org.jmis.riskassess.vo.AlarmRealtimeVO;
import org.jmis.riskassess.vo.DzAlarmAcceptVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import org.springjmis.core.tool.utils.Func;
import org.springjmis.core.tool.utils.ObjectUtil;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Component
public class MessagePushTask {
	@Autowired
	private WebSocketUtil webSocketUtil;

	@Autowired
	private IMessageUserService messageUserService;
	@Autowired
	private IMessageService messageService;

	@Scheduled(fixedDelay = 10000) // 每10秒执行一次
	public void pushUnreadMessages() {
		// 查询未读消息的用户以及消息内容
		List> userIds = messageUserService.findUsersWithUnreadMessages();

		// 推送未读消息给相应的用户
		for (Map user : userIds) {
			Long idLong = (Long) user.get("id");
			String id = String.valueOf(idLong);
			String userId = user.get("user_id").toString();
			Object isImportant= user.get("is_important");
			String messageName = (String) user.get("message_name");
			String details = (String) user.get("details");
			String messageIdLong = user.get("message_id").toString();
			String messageId = String.valueOf(messageIdLong);
			String type = (String) user.get("type");
			// 构造推送消息的内容
			JSONObject pushMessage = new JSONObject();
			pushMessage.put("messageId", messageId);
			pushMessage.put("messageName", messageName);
			pushMessage.put("details", details);
			pushMessage.put("userId", userId);
			pushMessage.put("type", type);
			pushMessage.put("isImportant", isImportant);
			pushMessage.put("id", id);
			// 将推送消息转换为JSON字符串
			String jsonMessage = pushMessage.toJSONString();

			// 推送消息给用户
			WebSocketUtil.pushMessage(userId, jsonMessage);
		}
	}
	//甲烷报警推送
	@Scheduled(fixedDelay = 10000) // 每10秒执行一次
	public void alarmMessages() {
		// 查询未读消息的用户以及消息内容
		List alarmRealtimeVOS = messageUserService.alarmMessages();
		// 推送未读消息给相应的用户
		for (AlarmRealtimeVO realtimeVO : alarmRealtimeVOS) {
			String id = realtimeVO.getAlarmid();
			String userId = realtimeVO.getUserId();
			String messageName = "超限报警";
						String details = "报警类型："+realtimeVO.getAlarmType()+","+"测点类型："+realtimeVO.getSensorname()+","+"报警地点："+
				realtimeVO.getNodeplace()+","+"报警开始时间："+realtimeVO.getStartTime()+","+"报警持续时长："+realtimeVO.getTimeLong()
				+","+"报警最大值："+realtimeVO.getMaxdata();
			saveMessage(id,messageName,details,"jkAlarm");
				saveMessageUser(id,userId);
		}
	}

	//矿井超员报警推送
	@Scheduled(fixedDelay = 10000) // 每10秒执行一次
	public void mineOverAlarmMessages() {
		// 查询未读消息的用户以及消息内容
		List messageInfos = messageUserService.mineOverAlarmMessages();
		// 推送未读消息给相应的用户
		for (MessageInfo realtimeVO : messageInfos) {

			saveMessage(realtimeVO.getId(),realtimeVO.getMessageName(),realtimeVO.getDetails(),"ryAlarm");
			saveMessageUser(realtimeVO.getId(),realtimeVO.getUserId());
		}
	}

	//地震报警推送
	@Scheduled(fixedDelay = 10000) // 每10秒执行一次
	public void dzAlarmMessages() {
		// 查询未读消息的用户以及消息内容
		List messageInfos = messageUserService.dzAlarmMessages();
		// 推送未读消息给相应的用户
		for (MessageInfo realtimeVO : messageInfos) {
			String id = realtimeVO.getId();
			List list = Func.toStrList(realtimeVO.getUserId());
			String messageName = "地震报警";
			String details = realtimeVO.getDetails();
			saveMessage(id,messageName,details,"dzAlarm");
			for (String s : list) {
				saveMessageUser(id,s);
			}

		}
	}

	//天气报警推送
	@Scheduled(fixedDelay = 10000) // 每10秒执行一次
	public void tqAlarmMessages() {
		// 查询未读消息的用户以及消息内容
		List tqAlarmMessages = messageUserService.tqAlarmMessages();
		// 存入message表和messageUser表
		for (MessageInfo realtimeVO : tqAlarmMessages) {
			String id = realtimeVO.getId();
			List list = Func.toStrList(realtimeVO.getUserId());
			String messageName = realtimeVO.getMessageName();
			String details = realtimeVO.getDetails();
			saveMessage(id,messageName,details,"tqAlarm");
			for (String s : list) {
				saveMessageUser(id,s);
			}
		}

	}


	public void saveMessage(String id ,String messageName,String details,String type){
		List list = messageService.messageIdList();
			if (!list.contains(id)){
				Message message=new Message();
				message.setMessageId(id);
				message.setMessageName(messageName);
				message.setType(type);
				message.setDetails(details);
				messageService.save(message);
			}
	}

	public void saveMessageUser(String id,String userId){

		List messageUserServiceOne= messageUserService.getMessageUser(id,userId);
		if (CollectionUtil.isEmpty(messageUserServiceOne)) {
				MessageUser messageUser = new MessageUser();
				messageUser.setUserId(userId);
				messageUser.setMessageId(id);
				messageUserService.save(messageUser);
			}
		}

	}