package cn.stylefeng.guns.modular.WebSocket;
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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.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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@ServerEndpoint(value = "/websocket/{userName}")
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@Component
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public class WebSocketService {
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private static final Logger log = LoggerFactory.getLogger(WebSocketService.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WebSocketServer对象。
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private static ConcurrentHashMap<String, WebSocketClient> 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userName*/
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private String userName="";
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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("userName") String userName) {
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if(!webSocketMap.containsKey(userName))
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{
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addOnlineCount(); // 在线数 +1
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}
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this.session = session;
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this.userName= userName;
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WebSocketClient client = new WebSocketClient();
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client.setSession(session);
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client.setUri(session.getRequestURI().toString());
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webSocketMap.put(userName, client);
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log.info("----------------------------------------------------------------------------");
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log.info("用户连接:"+userName+",当前在线人数为:" + getOnlineCount());
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try {
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// sendMessage("来自后台的反馈：连接成功");
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} catch (Exception e) {
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log.error("用户:"+userName+",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(userName)){
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webSocketMap.remove(userName);
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if(webSocketMap.size()>0)
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{
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//从set中删除
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subOnlineCount();
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}
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}
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log.info("----------------------------------------------------------------------------");
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log.info(userName+"用户退出,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("收到用户消息:"+userName+",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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}
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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.userName+",原因:"+error.getMessage());
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error.printStackTrace();
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}
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/**
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* 连接服务器成功后主动推送
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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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* 向指定客户端发送消息
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* @param userName
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* @param message
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*/
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public static void sendMessage(String userName,String message){
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try {
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WebSocketClient webSocketClient = webSocketMap.get(userName);
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if(webSocketClient!=null){
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webSocketClient.getSession().getBasicRemote().sendText(message);
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}
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} catch (IOException e) {
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e.printStackTrace();
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throw new RuntimeException(e.getMessage());
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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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WebSocketService.onlineCount++;
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}
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public static synchronized void subOnlineCount() {
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WebSocketService.onlineCount--;
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}
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public static void setOnlineCount(int onlineCount) {
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WebSocketService.onlineCount = onlineCount;
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}
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public static ConcurrentHashMap<String, WebSocketClient> getWebSocketMap() {
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return webSocketMap;
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}
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public static void setWebSocketMap(ConcurrentHashMap<String, WebSocketClient> webSocketMap) {
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WebSocketService.webSocketMap = webSocketMap;
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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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public String getUserName() {
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return userName;
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}
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public void setUserName(String userName) {
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this.userName = userName;
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}
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}
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