package com.gk.firework.Config.WebSocket;
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import lombok.extern.slf4j.Slf4j;
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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.Map;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.CopyOnWriteArraySet;
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import java.util.concurrent.atomic.AtomicInteger;
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@Component("websocket")
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@ServerEndpoint("/push/{uid}")
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@Slf4j
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public class WebSocketServer {
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@PostConstruct
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public void init() {
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System.out.println("websocket 加载");
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}
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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 final AtomicInteger onlineCount = new AtomicInteger(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 Map<Long,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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private Long uid;
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/**
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* 连接建立成功调用的方法
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*/
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@OnOpen
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public void onOpen(Session session,@PathParam("uid") Long uid) {
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this.session = session;
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this.uid = uid;
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if(webSocketMap.containsKey(uid)){
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webSocketMap.remove(uid);
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webSocketMap.put(uid,this);
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}else{
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webSocketMap.put(uid,this);
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onlineCount.incrementAndGet();
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}
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log.info("有新窗口开始监听:当前在线人数为" + onlineCount);
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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(uid)) {
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webSocketMap.remove(uid);
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onlineCount.decrementAndGet();
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}
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log.info("有一连接关闭！当前在线人数为" + onlineCount);
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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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* @param message 客户端发送过来的消息
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*/
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@OnMessage
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public void onMessage(String message) throws IOException {
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log.info("来自客户端的消息：{}",message);
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sendMessage("收到消息，消息内容："+message);
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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("发生错误：{}，Session ID： {}",error.getMessage(),session.getId());
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}
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public void sendMessage(String message) throws IOException {
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synchronized(session) {
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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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* @param uid
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* @param message
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*/
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public static void sendMessage(@PathParam("uid") Long uid, String message) {
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try {
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if (webSocketMap.containsKey(uid)) webSocketMap.get(uid).sendMessage(message);
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} catch (IOException e) {
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log.error("发送消息出错：{}", e.getMessage());
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e.printStackTrace();
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}
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}
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/**
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* 群发消息
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* @param message
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* @throws IOException
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*/
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public static void broadcast(String message) throws IOException {
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}
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public Session getSession() {
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return session;
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}
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public void setSession(Session session) {
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this.session = session;
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}
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}
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