若依框架添加websocket服务监听日志文件变化并发送给前端

1 后端

1.1 添加websocket依赖

在ruoyi-framework模块pom.xml添加websocket依赖包

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-websocket</artifactId>
</dependency>

1.2 添加websocket配置

在ruoyi-framework模块的config下添加WebSocketConfig配置类

package com.ruoyi.framework.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;

@Configuration
public class WebSocketConfig {
   
   
    @Bean
    public ServerEndpointExporter serverEndpointExporter() {
   
   
        return new ServerEndpointExporter();
    }
}

1.3 实现websocket服务

在ruoyi-admin添加一个包名handler,然后往里添加类WebSocketServer

package com.ruoyi.web.handler;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Component;

import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.io.IOException;
import java.util.concurrent.ConcurrentHashMap;

@ServerEndpoint("/websocket/{userId}")
@Component
@Slf4j
public class WebSocketServer {
   
   

    /**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。*/
    private static int onlineCount = 0;
    /**concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。*/
    private static ConcurrentHashMap<String,WebSocketServer> webSocketMap = new ConcurrentHashMap<>();
    /**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*/
    private Session session;
    /**接收userId*/
    private String userId="";


    /**
     * 连接建立成功调用的方法*/
    @OnOpen
    public void onOpen(Session session, @PathParam("userId") String userId) {
   
   
        this.session = session;
        this.userId=userId;
        if(webSocketMap.