package com.badao.demo.websocket;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.timeout.IdleStateEvent;
import lombok.extern.slf4j.Slf4j;
import org.yeauty.annotation.*;
import org.yeauty.pojo.Session;
import java.io.IOException;
import java.util.concurrent.Semaphore;
@ServerEndpoint(path = "/websocket/{userName}", port = "${ws.port}", readerIdleTimeSeconds = "${ws.readerIdleTimeSeconds}", writerIdleTimeSeconds = "${ws.writerIdleTimeSeconds}", allIdleTimeSeconds = "${ws.allIdleTimeSeconds}")
@Slf4j
public class WebSocketServer {
/**
* 默认最多允许同时在线人数 200
*/
public static int socketMaxOnlineCount = 200;
private static final Semaphore socketSemaphore = new Semaphore(socketMaxOnlineCount);
@OnOpen
public void onOpen(Session session, HttpHeaders headers, @PathVariable String userName) {
boolean semaphoreFlag = false;
// 尝试获取信号量
semaphoreFlag = SemaphoreUtils.tryAcquire(socketSemaphore);
if (!semaphoreFlag) {
// 未获取到信号量
log.error("\n 当前人数 - {} , 限制人数:{} ", WebSocketUsers.getUsers().size(), socketMaxOnlineCount);
WebSocketUsers.sendMessageToUserByText(session, "当前人数:" + WebSocketUsers.getUsers().size() + " 限制人数:" + socketMaxOnlineCount);
session.close();
} else {
// 添加用户
WebSocketUsers.sendMessageToUserByText(session, "连接成功");
WebSocketUsers.put(userName, session);
log.warn("\n 用户:{} 连接后 , 当前人数 : {}", userName, WebSocketUsers.getUsers().size());
}
}
@OnClose
public void onClose(Session session, @PathVariable String userName) throws IOException {
// 移除用户
WebSocketUsers.remove(userName);
log.warn("\n 用户:{} 关闭后 , 当前人数 : {}", userName, WebSocketUsers.getUsers().size());
// 获取到信号量则需释放
SemaphoreUtils.release(socketSemaphore);
}
@OnError
public void onError(Session session, @PathVariable String userName, Throwable exception) {
if (session.isOpen()) {
// 关闭连接
session.close();
}
log.warn("\n 连接异常 - {}", userName);
log.warn("\n 异常信息 - {}", exception);
// 移出用户
WebSocketUsers.remove(userName);
// 获取到信号量则需释放
SemaphoreUtils.release(socketSemaphore);
}
@OnMessage
public void onMessage(Session session, String message) {
WebSocketUsers.sendMessageToUserByText(session, message);
}
@OnBinary
public void onBinary(Session session, byte[] bytes) {
for (byte b : bytes) {
System.out.println(b);
}
session.sendBinary(bytes);
}
@OnEvent
public void onEvent(@PathVariable String userName, Session session, Object evt) {
if (evt instanceof IdleStateEvent) {
IdleStateEvent idleStateEvent = (IdleStateEvent) evt;
switch (idleStateEvent.state()) {
case READER_IDLE:
log.error("user-{} Read timeout!", userName);
session.close();
break;
case WRITER_IDLE:
log.error("user-{} Write timeout!", userName);
session.close();
break;
case ALL_IDLE:
log.error("user-{} All timeout!", userName);
session.close();
break;
default:
break;
}
}
}
}
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温馨提示
SpringBoot中使用Netty开发WebSocket服务改造多线程群发消息示例代码: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/131681393
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