package com.chinaztt.mes.common.server;
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import lombok.extern.slf4j.Slf4j;
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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.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.CopyOnWriteArraySet;
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/**
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* @Author 张宾
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* @Date 2023/11/16
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*/
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@Component
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@Slf4j
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@ServerEndpoint("/websocket/{userId}") // 接口路径 ws://ip:端口/webSocket/userId;
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public class WebSocketMessage {
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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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/**
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* 用户ID
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*/
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private String userId;
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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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//虽然@Component默认是单例模式的,但springboot还是会为每个websocket连接初始化一个bean,所以可以用一个静态set保存起来。
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// 注:底下WebSocket是当前类名
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private static CopyOnWriteArraySet<WebSocketMessage> webSockets =new CopyOnWriteArraySet<>();
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// 用来存在线连接用户信息
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private static ConcurrentHashMap<String,Session> sessionPool = new ConcurrentHashMap<String,Session>();
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/**
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* 链接成功调用的方法
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*/
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@OnOpen
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public void onOpen(Session session, @PathParam(value="userId")String userId) {
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try {
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this.session = session;
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this.userId = userId;
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webSockets.add(this);
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sessionPool.put(userId, session);
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log.info("【websocket消息】有新的连接,总数为:"+webSockets.size());
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} catch (Exception e) {
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}
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}
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/**
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* 链接关闭调用的方法
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*/
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@OnClose
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public void onClose() {
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try {
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webSockets.remove(this);
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sessionPool.remove(this.userId);
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log.info("【websocket消息】连接断开,总数为:"+webSockets.size());
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} catch (Exception e) {
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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
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*/
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@OnMessage
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public void onMessage(String message) {
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log.info("【websocket消息】收到客户端消息:"+message);
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}
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/** 发送错误时的处理
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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,原因:"+error.getMessage());
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error.printStackTrace();
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}
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// 此为广播消息
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public void sendAllMessage(String message) {
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log.info("【websocket消息】广播消息:"+message);
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for(WebSocketMessage webSocket : webSockets) {
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try {
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if(webSocket.session.isOpen()) {
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webSocket.session.getAsyncRemote().sendText(message);
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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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// 此为单点消息
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public void sendOneMessage(String userId, String message) {
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Session session = sessionPool.get(userId);
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if (session != null&&session.isOpen()) {
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try {
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log.info("【websocket消息】 单点消息:"+message);
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session.getAsyncRemote().sendText(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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// 此为单点消息(多人)
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public void sendMoreMessage(String[] userIds, String message) {
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for(String userId:userIds) {
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Session session = sessionPool.get(userId);
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if (session != null&&session.isOpen()) {
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try {
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log.info("【websocket消息】 单点消息:"+message);
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session.getAsyncRemote().sendText(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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}
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