feat(event): 添加事件统计功能和优化性能

- 在EasyEventGeneric中添加GetListenerCount方法获取监听器数量
- 重新排列EnhancedEventBus中字段顺序以优化内存布局
- 为所有Send方法添加发布统计记录功能
- 实现事件处理器包装以添加统计功能，包括成功处理和失败记录
- 添加监听器数量统计更新机制，自动跟踪注册和注销事件
- 重构FilterableEvent中的过滤逻辑以减少锁持有时间
- 在PriorityEvent中添加GetListenerCount方法获取总监听器数量
- 移除EventStatistics中的过时字段并优化ActiveEventTypes和ActiveListeners计算
- 清理StatisticsEventDecorator中的并发问题和实现装饰器模式

GFramework.Core/events/EasyEventGeneric.cs

@@ -59,6 +59,15 @@ public class Event<T> : IEvent
     {
         _mOnEvent?.Invoke(t);
     }
+
+    /// <summary>
+    ///     获取当前已注册的监听器数量
+    /// </summary>
+    /// <returns>监听器数量</returns>
+    public int GetListenerCount()
+    {
+        return _mOnEvent?.GetInvocationList().Length ?? 0;
+    }
 }
 
 /// <summary>
@@ -120,4 +129,13 @@ public class Event<T, Tk> : IEvent
     {
         _mOnEvent?.Invoke(t, k);
     }
+
+    /// <summary>
+    ///     获取当前已注册的监听器数量
+    /// </summary>
+    /// <returns>监听器数量</returns>
+    public int GetListenerCount()
+    {
+        return _mOnEvent?.GetInvocationList().Length ?? 0;
+    }
 }

GFramework.Core/events/EnhancedEventBus.cs

@@ -37,6 +37,8 @@ public sealed class EnhancedEventBus : IEventBus
     /// <typeparam name="T">事件类型</typeparam>
     public void Send<T>() where T : new()
     {
+        _statistics?.RecordPublish(typeof(T).Name);
+
         _mEvents
             .GetOrAddEvent<Event<T>>()
             .Trigger(new T());
@@ -49,6 +51,8 @@ public sealed class EnhancedEventBus : IEventBus
     /// <param name="e">事件实例</param>
     public void Send<T>(T e)
     {
+        _statistics?.RecordPublish(typeof(T).Name);
+
         _mEvents
             .GetOrAddEvent<Event<T>>()
             .Trigger(e);
@@ -62,6 +66,8 @@ public sealed class EnhancedEventBus : IEventBus
     /// <param name="propagation">事件传播方式</param>
     public void Send<T>(T e, EventPropagation propagation)
     {
+        _statistics?.RecordPublish(typeof(T).Name);
+
         _mPriorityEvents
             .GetOrAddEvent<PriorityEvent<T>>()
             .Trigger(e, propagation);
@@ -75,6 +81,32 @@ public sealed class EnhancedEventBus : IEventBus
     /// <returns>反注册接口，用于取消订阅</returns>
     public IUnRegister Register<T>(Action<T> onEvent)
     {
+        if (_statistics != null)
+        {
+            // 包装回调以添加统计
+            Action<T> wrappedHandler = data =>
+            {
+                try
+                {
+                    onEvent(data);
+                    _statistics.RecordHandle();
+                }
+                catch
+                {
+                    _statistics.RecordFailure();
+                    throw;
+                }
+            };
+
+            var unregister = _mEvents.GetOrAddEvent<Event<T>>().Register(wrappedHandler);
+            UpdateEventListenerCount<T>();
+            return new DefaultUnRegister(() =>
+            {
+                unregister.UnRegister();
+                UpdateEventListenerCount<T>();
+            });
+        }
+
         return _mEvents.GetOrAddEvent<Event<T>>().Register(onEvent);
     }
 
@@ -87,6 +119,32 @@ public sealed class EnhancedEventBus : IEventBus
     /// <returns>反注册接口，用于取消订阅</returns>
     public IUnRegister Register<T>(Action<T> onEvent, int priority)
     {
+        if (_statistics != null)
+        {
+            // 包装回调以添加统计
+            Action<T> wrappedHandler = data =>
+            {
+                try
+                {
+                    onEvent(data);
+                    _statistics.RecordHandle();
+                }
+                catch
+                {
+                    _statistics.RecordFailure();
+                    throw;
+                }
+            };
+
+            var unregister = _mPriorityEvents.GetOrAddEvent<PriorityEvent<T>>().Register(wrappedHandler, priority);
+            UpdatePriorityEventListenerCount<T>();
+            return new DefaultUnRegister(() =>
+            {
+                unregister.UnRegister();
+                UpdatePriorityEventListenerCount<T>();
+            });
+        }
+
         return _mPriorityEvents.GetOrAddEvent<PriorityEvent<T>>().Register(onEvent, priority);
     }
 
@@ -98,6 +156,7 @@ public sealed class EnhancedEventBus : IEventBus
     public void UnRegister<T>(Action<T> onEvent)
     {
         _mEvents.GetEvent<Event<T>>().UnRegister(onEvent);
+        UpdateEventListenerCount<T>();
     }
 
     /// <summary>
@@ -108,6 +167,32 @@ public sealed class EnhancedEventBus : IEventBus
     /// <returns>反注册接口，用于取消订阅</returns>
     public IUnRegister RegisterWithContext<T>(Action<EventContext<T>> onEvent)
     {
+        if (_statistics != null)
+        {
+            // 包装回调以添加统计
+            Action<EventContext<T>> wrappedHandler = context =>
+            {
+                try
+                {
+                    onEvent(context);
+                    _statistics.RecordHandle();
+                }
+                catch
+                {
+                    _statistics.RecordFailure();
+                    throw;
+                }
+            };
+
+            var unregister = _mPriorityEvents.GetOrAddEvent<PriorityEvent<T>>().RegisterWithContext(wrappedHandler);
+            UpdatePriorityEventListenerCount<T>();
+            return new DefaultUnRegister(() =>
+            {
+                unregister.UnRegister();
+                UpdatePriorityEventListenerCount<T>();
+            });
+        }
+
         return _mPriorityEvents.GetOrAddEvent<PriorityEvent<T>>().RegisterWithContext(onEvent);
     }
 
@@ -120,6 +205,33 @@ public sealed class EnhancedEventBus : IEventBus
     /// <returns>反注册接口，用于取消订阅</returns>
     public IUnRegister RegisterWithContext<T>(Action<EventContext<T>> onEvent, int priority)
     {
+        if (_statistics != null)
+        {
+            // 包装回调以添加统计
+            Action<EventContext<T>> wrappedHandler = context =>
+            {
+                try
+                {
+                    onEvent(context);
+                    _statistics.RecordHandle();
+                }
+                catch
+                {
+                    _statistics.RecordFailure();
+                    throw;
+                }
+            };
+
+            var unregister = _mPriorityEvents.GetOrAddEvent<PriorityEvent<T>>()
+                .RegisterWithContext(wrappedHandler, priority);
+            UpdatePriorityEventListenerCount<T>();
+            return new DefaultUnRegister(() =>
+            {
+                unregister.UnRegister();
+                UpdatePriorityEventListenerCount<T>();
+            });
+        }
+
         return _mPriorityEvents.GetOrAddEvent<PriorityEvent<T>>().RegisterWithContext(onEvent, priority);
     }
 
@@ -239,4 +351,40 @@ public sealed class EnhancedEventBus : IEventBus
     }
 
     #endregion
+
+    #region Helper Methods
+
+    /// <summary>
+    ///     更新普通事件的监听器数量统计
+    /// </summary>
+    private void UpdateEventListenerCount<T>()
+    {
+        if (_statistics == null)
+            return;
+
+        var evt = _mEvents.GetEvent<Event<T>>();
+        if (evt != null)
+        {
+            var count = evt.GetListenerCount();
+            _statistics.UpdateListenerCount(typeof(T).Name, count);
+        }
+    }
+
+    /// <summary>
+    ///     更新优先级事件的监听器数量统计
+    /// </summary>
+    private void UpdatePriorityEventListenerCount<T>()
+    {
+        if (_statistics == null)
+            return;
+
+        var evt = _mPriorityEvents.GetEvent<PriorityEvent<T>>();
+        if (evt != null)
+        {
+            var count = evt.GetListenerCount();
+            _statistics.UpdateListenerCount(typeof(T).Name, count);
+        }
+    }
+
+    #endregion
 }

GFramework.Core/events/EventStatistics.cs

@@ -12,8 +12,6 @@ public sealed class EventStatistics : IEventStatistics
     private readonly Dictionary<string, int> _listenerCountByType = new();
     private readonly object _lock = new();
     private readonly Dictionary<string, long> _publishCountByType = new();
-    private int _activeEventTypes;
-    private int _activeListeners;
     private long _totalFailed;
     private long _totalHandled;
     private long _totalPublished;
@@ -30,15 +28,25 @@ public sealed class EventStatistics : IEventStatistics
     /// <inheritdoc />
     public int ActiveEventTypes
     {
-        get => Interlocked.CompareExchange(ref _activeEventTypes, 0, 0);
-        set => Interlocked.Exchange(ref _activeEventTypes, value);
+        get
+        {
+            lock (_lock)
+            {
+                return _publishCountByType.Count;
+            }
+        }
     }
 
     /// <inheritdoc />
     public int ActiveListeners
     {
-        get => Interlocked.CompareExchange(ref _activeListeners, 0, 0);
-        set => Interlocked.Exchange(ref _activeListeners, value);
+        get
+        {
+            lock (_lock)
+            {
+                return _listenerCountByType.Values.Sum();
+            }
+        }
     }
 
     /// <inheritdoc />
@@ -65,8 +73,6 @@ public sealed class EventStatistics : IEventStatistics
         Interlocked.Exchange(ref _totalPublished, 0);
         Interlocked.Exchange(ref _totalHandled, 0);
         Interlocked.Exchange(ref _totalFailed, 0);
-        Interlocked.Exchange(ref _activeEventTypes, 0);
-        Interlocked.Exchange(ref _activeListeners, 0);
 
         lock (_lock)
         {

GFramework.Core/events/FilterableEvent.cs

@@ -61,21 +61,21 @@ public sealed class FilterableEvent<T>
         // 记录发布统计
         _statistics?.RecordPublish(typeof(T).Name);
 
-        // 应用过滤器
-        lock (_lock)
-        {
-            // 事件被过滤，不触发监听器
-            if (_filters.Any(filter => filter.ShouldFilter(data)))
-                return;
-        }
-
-        // 获取当前监听器快照（在锁外调用）
+        // 在单个锁中快照过滤器和监听器
         Action<T>? handlers;
+        IEventFilter<T>[] filtersSnapshot;
+
         lock (_lock)
         {
+            filtersSnapshot = _filters.Count > 0 ? _filters.ToArray() : Array.Empty<IEventFilter<T>>();
             handlers = _onEvent;
         }
 
+        // 在锁外执行过滤逻辑
+        // 事件被过滤，不触发监听器
+        if (filtersSnapshot.Any(filter => filter.ShouldFilter(data)))
+            return;
+
         if (handlers == null)
             return;
 

GFramework.Core/events/PriorityEvent.cs

@@ -254,6 +254,15 @@ public class PriorityEvent<T> : IEvent
         }
     }
 
+    /// <summary>
+    ///     获取当前已注册的监听器总数量（包括普通监听器和上下文监听器）
+    /// </summary>
+    /// <returns>监听器总数量</returns>
+    public int GetListenerCount()
+    {
+        return _handlers.Count + _contextHandlers.Count;
+    }
+
     /// <summary>
     ///     事件处理器包装类，包含处理器和优先级
     /// </summary>

GFramework.Core/events/StatisticsEventDecorator.cs

@@ -0,0 +1,108 @@
+using GFramework.Core.Abstractions.events;
+
+namespace GFramework.Core.events;
+
+/// <summary>
+///     带统计功能的事件装饰器
+///     使用装饰器模式为任何 IEvent 实现添加统计功能
+/// </summary>
+/// <typeparam name="T">事件数据类型</typeparam>
+internal sealed class StatisticsEventDecorator<T>
+{
+    private readonly string _eventTypeName;
+    private readonly IEvent _innerEvent;
+    private readonly EventStatistics _statistics;
+
+    /// <summary>
+    ///     构造函数
+    /// </summary>
+    /// <param name="innerEvent">被装饰的事件对象</param>
+    /// <param name="statistics">统计对象</param>
+    public StatisticsEventDecorator(IEvent innerEvent, EventStatistics statistics)
+    {
+        _innerEvent = innerEvent ?? throw new ArgumentNullException(nameof(innerEvent));
+        _statistics = statistics ?? throw new ArgumentNullException(nameof(statistics));
+        _eventTypeName = typeof(T).Name;
+    }
+
+    /// <summary>
+    ///     注册事件监听器（带统计）
+    /// </summary>
+    /// <param name="onEvent">事件处理回调</param>
+    /// <returns>反注册接口</returns>
+    public IUnRegister Register(Action<T> onEvent)
+    {
+        // 包装回调以添加统计
+        Action<T> wrappedHandler = data =>
+        {
+            try
+            {
+                onEvent(data);
+                _statistics.RecordHandle();
+            }
+            catch
+            {
+                _statistics.RecordFailure();
+                throw;
+            }
+        };
+
+        var unregister = _innerEvent.Register(() => { }); // 占位，实际不使用
+
+        // 直接注册到内部事件
+        if (_innerEvent is Event<T> typedEvent)
+        {
+            unregister = typedEvent.Register(wrappedHandler);
+        }
+        else if (_innerEvent is PriorityEvent<T> priorityEvent)
+        {
+            unregister = priorityEvent.Register(wrappedHandler);
+        }
+
+        // 更新监听器统计
+        UpdateListenerCount();
+
+        return new DefaultUnRegister(() =>
+        {
+            unregister.UnRegister();
+            UpdateListenerCount();
+        });
+    }
+
+    /// <summary>
+    ///     触发事件（带统计）
+    /// </summary>
+    /// <param name="data">事件数据</param>
+    public void Trigger(T data)
+    {
+        _statistics.RecordPublish(_eventTypeName);
+
+        if (_innerEvent is Event<T> typedEvent)
+        {
+            typedEvent.Trigger(data);
+        }
+        else if (_innerEvent is PriorityEvent<T> priorityEvent)
+        {
+            priorityEvent.Trigger(data, EventPropagation.Continue);
+        }
+    }
+
+    /// <summary>
+    ///     更新监听器数量统计
+    /// </summary>
+    private void UpdateListenerCount()
+    {
+        var count = 0;
+
+        if (_innerEvent is Event<T> typedEvent)
+        {
+            count = typedEvent.GetListenerCount();
+        }
+        else if (_innerEvent is PriorityEvent<T> priorityEvent)
+        {
+            count = priorityEvent.GetListenerCount();
+        }
+
+        _statistics.UpdateListenerCount(_eventTypeName, count);
+    }
+}