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package com.yihu.jw.care.endpoint;
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import com.alibaba.fastjson.JSONObject;
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import org.apache.commons.lang.StringUtils;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.stereotype.Component;
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import javax.annotation.PostConstruct;
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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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import com.alibaba.fastjson.JSON;
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/***
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* @ClassName: WebSocketServer
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* @Description:
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* @Auther: shi kejing
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* @Date: 2021/8/20 14:20
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*/
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@ServerEndpoint("/imserver/{userId}")
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@Component
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public class WebSocketServer {
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private final static Logger log = LoggerFactory.getLogger(WebSocketServer.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,WebSocketServer> 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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* 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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log.info("userId = "+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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log.info("用户连接:"+userId+",当前在线人数为:" + getOnlineCount());
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try {
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sendMessage("连接成功");
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} catch (IOException 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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* 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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* 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("toUserId");
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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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webSocketMap.get(toUserId).sendMessage(jsonObject.toJSONString());
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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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* @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 IOException {
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this.session.getBasicRemote().sendText(message);
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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("userId") String userId) throws IOException {
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log.info("发送消息到:"+userId+",报文:"+message);
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if(StringUtils.isNotBlank(userId)&&webSocketMap.containsKey(userId)){
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webSocketMap.get(userId).sendMessage(message);
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}else{
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log.error("用户"+userId+",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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