update 优化SSE连接

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

@@ -1,6 +1,7 @@
 package org.dromara.common.sse.core;
 
 import cn.hutool.core.map.MapUtil;
+import cn.hutool.core.util.ObjectUtil;
 import lombok.extern.slf4j.Slf4j;
 import org.dromara.common.redis.utils.RedisUtils;
 import org.dromara.common.sse.dto.SseMessageDto;
@@ -24,6 +25,9 @@ public class SseEmitterManager {
      */
     private final static String SSE_TOPIC = "global:sse";
 
+    /**
+     * 本地内存缓存，存活用户连接
+     */
     private final static Map<Long, Map<String, SseEmitter>> USER_TOKEN_EMITTERS = new ConcurrentHashMap<>();
 
     /**
@@ -43,32 +47,18 @@ public class SseEmitterManager {
 
         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(() -> {
-            SseEmitter remove = emitters.remove(token);
-            if (remove != null) {
-                remove.complete();
-            }
-        });
-        emitter.onTimeout(() -> {
-            SseEmitter remove = emitters.remove(token);
-            if (remove != null) {
-                remove.complete();
-            }
-        });
-        emitter.onError((e) -> {
-            SseEmitter remove = emitters.remove(token);
-            if (remove != null) {
-                remove.complete();
-            }
-        });
+        // 注册连接结束、超时、错误等统一清理逻辑
+        Runnable callback = () -> disconnect(userId, token);
+        emitter.onCompletion(callback);
+        emitter.onTimeout(callback);
+        emitter.onError(e -> callback.run());
 
         try {
-            // 向客户端发送一条连接成功的事件
             emitter.send(SseEmitter.event().comment("connected"));
+            log.warn("SSE连接成功 userId={}, token={}", userId, token);
         } catch (IOException e) {
-            // 如果发送消息失败，则从映射表中移除 emitter
-            emitters.remove(token);
+            log.warn("SSE连接初始化失败 userId={}, token={}, 错误: {}", userId, token, e.getMessage());
+            disconnect(userId, token);
         }
         return emitter;
     }
@@ -85,13 +75,20 @@ public class SseEmitterManager {
         }
         Map<String, SseEmitter> emitters = USER_TOKEN_EMITTERS.get(userId);
         if (MapUtil.isNotEmpty(emitters)) {
-            try {
-                SseEmitter sseEmitter = emitters.get(token);
-                sseEmitter.send(SseEmitter.event().comment("disconnected"));
-                sseEmitter.complete();
-            } catch (Exception ignore) {
+            SseEmitter sseEmitter = emitters.remove(token);
+            if (ObjectUtil.isNotNull(sseEmitter)) {
+                try {
+                    sseEmitter.send(SseEmitter.event().comment("disconnected"));
+                } catch (IOException e) {
+                    log.warn("SSE断开通知失败 userId={}, token={}", userId, token);
+                } finally {
+                    sseEmitter.complete();
+                    log.warn("SSE连接断开 userId={}, token={}", userId, token);
+                }
+            }
+            if (emitters.isEmpty()) {
+                USER_TOKEN_EMITTERS.remove(userId);
             }
-            emitters.remove(token);
         } else {
             USER_TOKEN_EMITTERS.remove(userId);
         }
@@ -115,16 +112,12 @@ public class SseEmitterManager {
     public void sendMessage(Long userId, String message) {
         Map<String, SseEmitter> emitters = USER_TOKEN_EMITTERS.get(userId);
         if (MapUtil.isNotEmpty(emitters)) {
-            for (Map.Entry<String, SseEmitter> entry : emitters.entrySet()) {
+            for (String token : emitters.keySet()) {
                 try {
-                    entry.getValue().send(SseEmitter.event()
-                        .name("message")
-                        .data(message));
+                    emitters.get(token).send(SseEmitter.event().name("message").data(message));
                 } catch (Exception e) {
-                    SseEmitter remove = emitters.remove(entry.getKey());
-                    if (remove != null) {
-                        remove.complete();
-                    }
+                    log.warn("SSE消息发送失败 userId={}, token={}, error={}", userId, token, e.getMessage());
+                    disconnect(userId, token);
                 }
             }
         } else {