!644 同步修复一些问题 Merge pull request !644 from 疯狂的狮子Li/dev

疯狂的狮子Li

2025-02-07 95c01301f65379e7634e4619bf4c49186aa5be41

 ruoyi-common/ruoyi-common-sse/src/main/java/org/dromara/common/sse/core/SseEmitterManager.java

@@ -1,20 +1,24 @@
package org.dromara.common.sse.core;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.map.MapUtil;
import lombok.extern.slf4j.Slf4j;
import org.dromara.common.redis.utils.RedisUtils;
import org.dromara.common.sse.dto.SseMessageDto;
import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Consumer;

/**
 * 管理 Server-Sent Events (SSE) 连接
 *
 * @author Lion Li
 */
@Slf4j
public class SseEmitterManager {

    /**
     * 订阅的频道
     */
@@ -22,32 +26,59 @@

    private final static Map<Long, Map<String, SseEmitter>> USER_TOKEN_EMITTERS = new ConcurrentHashMap<>();

    /**
     * 建立与指定用户的 SSE 连接
     *
     * @param userId 用户的唯一标识符，用于区分不同用户的连接
     * @param token  用户的唯一令牌，用于识别具体的连接
     * @return 返回一个 SseEmitter 实例，客户端可以通过该实例接收 SSE 事件
     */
    public SseEmitter connect(Long userId, String token) {
        // 从 USER_TOKEN_EMITTERS 中获取或创建当前用户的 SseEmitter 映射表（ConcurrentHashMap）
        // 每个用户可以有多个 SSE 连接，通过 token 进行区分
        Map<String, SseEmitter> emitters = USER_TOKEN_EMITTERS.computeIfAbsent(userId, k -> new ConcurrentHashMap<>());

        // 创建一个新的 SseEmitter 实例，超时时间设置为 0 表示无限制
        SseEmitter emitter = new SseEmitter(0L);

        emitters.put(token, emitter);

        // 当 emitter 完成、超时或发生错误时，从映射表中移除对应的 token
        emitter.onCompletion(() -> emitters.remove(token));
        emitter.onTimeout(() -> emitters.remove(token));
        emitter.onError((e) -> emitters.remove(token));

        try {
            // 向客户端发送一条连接成功的事件
            emitter.send(SseEmitter.event().comment("connected"));
        } catch (IOException e) {
            // 如果发送消息失败，则从映射表中移除 emitter
            emitters.remove(token);
        }
        return emitter;
    }

    /**
     * 断开指定用户的 SSE 连接
     *
     * @param userId 用户的唯一标识符，用于区分不同用户的连接
     * @param token  用户的唯一令牌，用于识别具体的连接
     */
    public void disconnect(Long userId, String token) {
        if (userId == null || token == null) {
            return;
        }
        Map<String, SseEmitter> emitters = USER_TOKEN_EMITTERS.get(userId);
        if (emitters != null) {
        if (MapUtil.isNotEmpty(emitters)) {
            try {
                emitters.get(token).send(SseEmitter.event().comment("disconnected"));
                SseEmitter sseEmitter = emitters.get(token);
                sseEmitter.send(SseEmitter.event().comment("disconnected"));
                sseEmitter.complete();
            } catch (Exception ignore) {
            }
            emitters.remove(token);
        } else {
            USER_TOKEN_EMITTERS.remove(userId);
        }
    }

@@ -68,7 +99,7 @@
     */
    public void sendMessage(Long userId, String message) {
        Map<String, SseEmitter> emitters = USER_TOKEN_EMITTERS.get(userId);
        if (emitters != null) {
        if (MapUtil.isNotEmpty(emitters)) {
            for (Map.Entry<String, SseEmitter> entry : emitters.entrySet()) {
                try {
                    entry.getValue().send(SseEmitter.event()
@@ -78,6 +109,8 @@
                    emitters.remove(entry.getKey());
                }
            }
        } else {
            USER_TOKEN_EMITTERS.remove(userId);
        }
    }

@@ -98,25 +131,13 @@
     * @param sseMessageDto 要发布的SSE消息对象
     */
    public void publishMessage(SseMessageDto sseMessageDto) {
        List<Long> unsentUserIds = new ArrayList<>();
        // 当前服务内用户,直接发送消息
        for (Long userId : sseMessageDto.getUserIds()) {
            if (USER_TOKEN_EMITTERS.containsKey(userId)) {
                sendMessage(userId, sseMessageDto.getMessage());
                continue;
            }
            unsentUserIds.add(userId);
        }
        // 不在当前服务内用户,发布订阅消息
        if (CollUtil.isNotEmpty(unsentUserIds)) {
            SseMessageDto broadcastMessage = new SseMessageDto();
            broadcastMessage.setMessage(sseMessageDto.getMessage());
            broadcastMessage.setUserIds(unsentUserIds);
            RedisUtils.publish(SSE_TOPIC, broadcastMessage, consumer -> {
                log.info("SSE发送主题订阅消息topic:{} session keys:{} message:{}",
                    SSE_TOPIC, unsentUserIds, sseMessageDto.getMessage());
            });
        }
        SseMessageDto broadcastMessage = new SseMessageDto();
        broadcastMessage.setMessage(sseMessageDto.getMessage());
        broadcastMessage.setUserIds(sseMessageDto.getUserIds());
        RedisUtils.publish(SSE_TOPIC, broadcastMessage, consumer -> {
            log.info("SSE发送主题订阅消息topic:{} session keys:{} message:{}",
                SSE_TOPIC, sseMessageDto.getUserIds(), sseMessageDto.getMessage());
        });
    }

    /**