feat: 优化事件管理，添加事件处理超时和并发限制功能

src/plugin_system/base/base_event.py

@@ -101,7 +101,9 @@ class BaseEvent:
     def __name__(self):
         return self.name
 
-    async def activate(self, params: dict) -> HandlerResultsCollection:
+    async def activate(
+        self, params: dict, handler_timeout: float | None = None, max_concurrency: int | None = None
+    ) -> HandlerResultsCollection:
         """激活事件，执行所有订阅的处理器
 
         Args:
@@ -115,40 +117,71 @@ class BaseEvent:
 
         # 使用锁确保同一个事件不能同时激活多次
         async with self.event_handle_lock:
-            # 按权重从高到低排序订阅者
-            # 使用直接属性访问，-1代表自动权重
             sorted_subscribers = sorted(
                 self.subscribers, key=lambda h: h.weight if hasattr(h, "weight") and h.weight != -1 else 0, reverse=True
             )
 
-            # 并行执行所有订阅者
-            tasks = []
-            for subscriber in sorted_subscribers:
-                # 为每个订阅者创建执行任务
-                task = self._execute_subscriber(subscriber, params)
-                tasks.append(task)
+            if not sorted_subscribers:
+                return HandlerResultsCollection([])
 
-            # 等待所有任务完成
-            results = await asyncio.gather(*tasks, return_exceptions=True)
+            concurrency_limit = None
+            if max_concurrency is not None:
+                concurrency_limit = max_concurrency if max_concurrency > 0 else None
+                if concurrency_limit:
+                    concurrency_limit = min(concurrency_limit, len(sorted_subscribers))
 
-            # 处理执行结果
-            processed_results = []
-            for i, result in enumerate(results):
-                subscriber = sorted_subscribers[i]
+            semaphore = (
+                asyncio.Semaphore(concurrency_limit)
+                if concurrency_limit and concurrency_limit < len(sorted_subscribers)
+                else None
+            )
+
+            async def _run_handler(subscriber):
                 handler_name = (
                     subscriber.handler_name if hasattr(subscriber, "handler_name") else subscriber.__class__.__name__
                 )
-                if result:
-                    if isinstance(result, Exception):
-                        # 处理执行异常
-                        logger.error(f"事件处理器 {handler_name} 执行失败: {result}")
-                        processed_results.append(HandlerResult(False, True, str(result), handler_name))
+
+                async def _invoke():
+                    return await self._execute_subscriber(subscriber, params)
+
+                try:
+                    if handler_timeout and handler_timeout > 0:
+                        result = await asyncio.wait_for(_invoke(), timeout=handler_timeout)
                     else:
-                        # 正常执行结果
-                        if not result.handler_name:
-                            # 补充handler_name
-                            result.handler_name = handler_name
-                        processed_results.append(result)
+                        result = await _invoke()
+                except asyncio.TimeoutError:
+                    logger.warning(f"事件处理器 {handler_name} 执行超时 ({handler_timeout}s)")
+                    return HandlerResult(False, True, f"timeout after {handler_timeout}s", handler_name)
+                except Exception as exc:
+                    logger.error(f"事件处理器 {handler_name} 执行失败: {exc}")
+                    return HandlerResult(False, True, str(exc), handler_name)
+
+                if not isinstance(result, HandlerResult):
+                    return HandlerResult(True, True, result, handler_name)
+
+                if not result.handler_name:
+                    result.handler_name = handler_name
+                return result
+
+            async def _guarded_run(subscriber):
+                if semaphore:
+                    async with semaphore:
+                        return await _run_handler(subscriber)
+                return await _run_handler(subscriber)
+
+            tasks = [asyncio.create_task(_guarded_run(subscriber)) for subscriber in sorted_subscribers]
+            results = await asyncio.gather(*tasks, return_exceptions=True)
+
+            processed_results: list[HandlerResult] = []
+            for subscriber, result in zip(sorted_subscribers, results):
+                handler_name = (
+                    subscriber.handler_name if hasattr(subscriber, "handler_name") else subscriber.__class__.__name__
+                )
+                if isinstance(result, Exception):
+                    logger.error(f"事件处理器 {handler_name} 执行失败: {result}")
+                    processed_results.append(HandlerResult(False, True, str(result), handler_name))
+                else:
+                    processed_results.append(result)
 
             return HandlerResultsCollection(processed_results)