WebSocketUtil.java
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package com.subsidy.util.websocket;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.subsidy.common.ResponseData;
import com.subsidy.mapper.OprMemDictMapper;
import com.subsidy.model.OprMemDictDO;
import com.subsidy.util.DateFormatUtil;
import lombok.SneakyThrows;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.CloseStatus;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.WebSocketMessage;
import org.springframework.web.socket.WebSocketSession;
import java.io.IOException;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
/**
* <p>
* WebSocket
* </p>
*
* @author DengMin
* @since 2022/7/13
*/
@Slf4j
@Component
public class WebSocketUtil implements WebSocketHandler {
@Autowired
private OprMemDictMapper oprMemDictMapper;
private int heartbeatMin = 1; // 断连最小心跳次数
private int heartbeatMax = 3; // 断连最大心跳次数
private int reconnectionSeconds = 60; //每次断连间隔重新连接秒
/**
* 存放建立连接webSocket对象
*/
private ConcurrentHashMap<Long, WebSocketSession> webSocketMap = new ConcurrentHashMap();
ConcurrentHashMap<String, ScheduledFuture> taskMap = new ConcurrentHashMap<>(1);
/**
* 处理成功连接WebSocket
* @param session
*/
@Override
public void afterConnectionEstablished(WebSocketSession session) throws IOException {
if(null != session) {
String params = session.getUri().getQuery();
Long id = Long.valueOf(params.split("=")[1]);
if(null != webSocketMap && webSocketMap.get(id) != null) {
if(webSocketMap.get(id).isOpen()) {
/* 相同账户进行挤号，发送消息给WebSocket通知账户已在其他地方登录 */
webSocketMap.get(id).sendMessage(new TextMessage(JSONObject.toJSONString(ResponseData.generateCreatedResponse(1011))));
webSocketMap.get(id).close();
} else {
/*
* 如果上次连接的WebSocket状态是关闭，
* 并且上一次记录时间大于 { heartbeatMax * reconnectionSeconds } 秒(心跳检测机制)，则判断为这次登陆是免密码登陆的重新记录上线时间
*/
List<OprMemDictDO> list = oprMemDictMapper.selectList(new QueryWrapper<OprMemDictDO>()
.lambda()
.eq(OprMemDictDO::getUserId, id)
.orderByDesc(OprMemDictDO::getCreateDate));
Calendar calendar = Calendar.getInstance();
calendar.setTime(DateFormatUtil.localDateTimeToDate(list.get(0).getCreateDate()));
calendar.add(Calendar.SECOND,heartbeatMax * reconnectionSeconds);
if(calendar.getTime().after(DateFormatUtil.localDateTimeToDate(list.get(0).getCreateDate()))) {
if(list.get(0).getOprType().equals("登出")) {
OprMemDictDO oprMemDictDO = new OprMemDictDO();
oprMemDictDO.setUserId(id);
oprMemDictDO.setResult(1);
oprMemDictDO.setOprType("登录");
oprMemDictDO.setIpAddress(session.getRemoteAddress().getHostName());
oprMemDictMapper.insert(oprMemDictDO);
}
}
}
webSocketMap.remove(id);
}
webSocketMap.put(id, session);
String httpSessionId = session.getId();
String host = session.getUri().getHost();
String query = session.getUri().getQuery();
log.info("----> webSocket connection success");
log.info("parameter:[ httpSessionId: {}, host: {}, {} ]", httpSessionId, host, query);
log.info("connection time: {}", DateFormatUtil.format(new Date(), DateFormatUtil.FMT_sdf14_L));
}
}
/**
* 处理WebSocket transport error
* @param session
* @param throwable
* @throws Exception
*/
@Override
public void handleTransportError(WebSocketSession session, Throwable throwable) throws Exception {
if(session.isOpen()) {
session.close();
}
String params = session.getUri().getQuery();
Long id = Long.valueOf(params.split("=")[1]);
webSocketMap.remove(id);
log.error("<---- webSocket transport error");
log.error("error message: {}", throwable.getMessage());
}
/**
* 在两端WebSocket connection都关闭或transport error发生后执行
* @param session
* @param closeStatus
* @throws Exception
*/
@Override
public void afterConnectionClosed(WebSocketSession session, CloseStatus closeStatus) throws Exception{
if(null != session) {
if(null != webSocketMap) {
String params = session.getUri().getQuery();
Long id = Long.valueOf(params.split("=")[1]);
heartbeat(webSocketMap.get(id));
}
log.info("<---- webSocket is close");
log.info("session {} close, status: {}", session.getId(), closeStatus);
}
}
/**
* 断开连接后进行三次心跳验证判断是否重新连接了，如果没有连接成功则判断为下线
*
* @param session
*/
public void heartbeat(WebSocketSession session) {
ScheduledExecutorService service = Executors.newScheduledThreadPool(1);
ScheduledFuture scheduledFuture = service.scheduleAtFixedRate(new Runnable() {
int beatsNum = heartbeatMin;
@SneakyThrows
@Override
public void run() {
if(null != session && !session.isOpen()) {
while (beatsNum > heartbeatMax) {
String params = session.getUri().getQuery();
Long id = Long.valueOf(params.split("=")[1]);
OprMemDictDO oprMemDictDO = new OprMemDictDO();
oprMemDictDO.setUserId(id);
oprMemDictDO.setResult(1);
oprMemDictDO.setOprType("登出");
oprMemDictDO.setIpAddress(session.getRemoteAddress().getHostName());
oprMemDictMapper.insert(oprMemDictDO);
taskMap.get(session.getId()).cancel(true);
}
beatsNum++;
} else if (null != session && session.isOpen()) {
/* 时间段内重新连接了结束验证 */
taskMap.get(session.getId()).cancel(true);
}
}
}, 0, reconnectionSeconds, TimeUnit.SECONDS);
taskMap.put(session.getId(), scheduledFuture);
}
/**
* 接收WebSocket客户端Message
* @param session
* @param message
* @throws Exception
*/
@Override
public void handleMessage(WebSocketSession session, WebSocketMessage<?> message) throws Exception {
if(message instanceof TextMessage) {
System.out.println(message.getPayload());
}
}
@Override
public boolean supportsPartialMessages() {
return false;
}
}