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321 changes: 321 additions & 0 deletions GFramework.Cqrs.Benchmarks/Messaging/NotificationLifetimeBenchmarks.cs
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// Copyright (c) 2025-2026 GeWuYou
// SPDX-License-Identifier: Apache-2.0

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Columns;
using BenchmarkDotNet.Configs;
using BenchmarkDotNet.Diagnosers;
using BenchmarkDotNet.Jobs;
using BenchmarkDotNet.Order;
using System;
using System.Threading;
using System.Threading.Tasks;
using GFramework.Core.Abstractions.Logging;
using GFramework.Core.Ioc;
using GFramework.Core.Logging;
using GFramework.Cqrs.Abstractions.Cqrs;
using MediatR;
using Microsoft.Extensions.DependencyInjection;

namespace GFramework.Cqrs.Benchmarks.Messaging;

/// <summary>
/// 对比单处理器 notification publish 在不同 handler 生命周期下的额外开销。
/// </summary>
/// <remarks>
/// 当前矩阵覆盖 <c>Singleton</c>、<c>Scoped</c> 与 <c>Transient</c>。
/// 其中 <c>Scoped</c> 会在每次 notification publish 前显式创建并释放真实的 DI 作用域,
/// 避免把 scoped handler 错误地压到根容器解析而扭曲生命周期对照。
/// </remarks>
[Config(typeof(Config))]
public class NotificationLifetimeBenchmarks
{
private MicrosoftDiContainer _container = null!;
private ICqrsRuntime? _runtime;
private ScopedBenchmarkContainer? _scopedContainer;
private ICqrsRuntime? _scopedRuntime;
private ServiceProvider _serviceProvider = null!;
private IPublisher? _publisher;
private BenchmarkNotificationHandler _baselineHandler = null!;
private BenchmarkNotification _notification = null!;
private ILogger _runtimeLogger = null!;

/// <summary>
/// 控制当前 benchmark 使用的 handler 生命周期。
/// </summary>
[Params(HandlerLifetime.Singleton, HandlerLifetime.Scoped, HandlerLifetime.Transient)]
public HandlerLifetime Lifetime { get; set; }

/// <summary>
/// 可公平比较的 benchmark handler 生命周期集合。
/// </summary>
public enum HandlerLifetime
{
/// <summary>
/// 复用单个 handler 实例。
/// </summary>
Singleton,

/// <summary>
/// 每次 publish 在显式作用域内解析并复用 handler 实例。
/// </summary>
Scoped,

/// <summary>
/// 每次 publish 都重新解析新的 handler 实例。
/// </summary>
Transient
}
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/// <summary>
/// 配置 notification lifetime benchmark 的公共输出格式。
/// </summary>
private sealed class Config : ManualConfig
{
public Config()
{
AddJob(Job.Default);
AddColumnProvider(DefaultColumnProviders.Instance);
AddColumn(new CustomColumn("Scenario", static (_, _) => "NotificationLifetime"));
AddDiagnoser(MemoryDiagnoser.Default);
WithOrderer(new DefaultOrderer(SummaryOrderPolicy.FastestToSlowest, MethodOrderPolicy.Declared));
}
}

/// <summary>
/// 构建当前生命周期下的 GFramework 与 MediatR notification 对照宿主。
/// </summary>
[GlobalSetup]
public void Setup()
{
LoggerFactoryResolver.Provider = new ConsoleLoggerFactoryProvider
{
MinLevel = LogLevel.Fatal
};
Fixture.Setup($"NotificationLifetime/{Lifetime}", handlerCount: 1, pipelineCount: 0);
BenchmarkDispatcherCacheHelper.ClearDispatcherCaches();

_baselineHandler = new BenchmarkNotificationHandler();
_notification = new BenchmarkNotification(Guid.NewGuid());
_runtimeLogger = LoggerFactoryResolver.Provider.CreateLogger(nameof(NotificationLifetimeBenchmarks) + "." + Lifetime);

_container = BenchmarkHostFactory.CreateFrozenGFrameworkContainer(container =>
{
RegisterGFrameworkHandler(container, Lifetime);
});

if (Lifetime != HandlerLifetime.Scoped)
{
_runtime = GFramework.Cqrs.CqrsRuntimeFactory.CreateRuntime(_container, _runtimeLogger);
}
else
{
_scopedContainer = new ScopedBenchmarkContainer(_container);
_scopedRuntime = GFramework.Cqrs.CqrsRuntimeFactory.CreateRuntime(_scopedContainer, _runtimeLogger);
}

_serviceProvider = BenchmarkHostFactory.CreateMediatRServiceProvider(
configure: null,
typeof(NotificationLifetimeBenchmarks),
static candidateType => candidateType == typeof(BenchmarkNotificationHandler),
ResolveMediatRLifetime(Lifetime));
if (Lifetime != HandlerLifetime.Scoped)
{
_publisher = _serviceProvider.GetRequiredService<IPublisher>();
}
}

/// <summary>
/// 释放当前生命周期矩阵持有的 benchmark 宿主资源。
/// </summary>
[GlobalCleanup]
public void Cleanup()
{
try
{
BenchmarkCleanupHelper.DisposeAll(_scopedContainer, _container, _serviceProvider);
}
finally
{
BenchmarkDispatcherCacheHelper.ClearDispatcherCaches();
}
}
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/// <summary>
/// 直接调用 handler,作为不同生命周期矩阵下的 publish 额外开销 baseline。
/// </summary>
/// <returns>代表基线 handler 完成当前 notification 处理的值任务。</returns>
[Benchmark(Baseline = true)]
public ValueTask PublishNotification_Baseline()
{
return _baselineHandler.Handle(_notification, CancellationToken.None);
}

/// <summary>
/// 通过 GFramework.CQRS runtime 发布 notification。
/// </summary>
/// <returns>代表当前 GFramework.CQRS publish 完成的值任务。</returns>
[Benchmark]
public ValueTask PublishNotification_GFrameworkCqrs()
{
if (Lifetime == HandlerLifetime.Scoped)
{
return PublishScopedGFrameworkNotificationAsync(
_scopedRuntime!,
_scopedContainer!,
_notification,
CancellationToken.None);
}

return _runtime!.PublishAsync(BenchmarkContext.Instance, _notification, CancellationToken.None);
}

/// <summary>
/// 通过 MediatR 发布 notification,作为外部对照。
/// </summary>
/// <returns>代表当前 MediatR publish 完成的任务。</returns>
[Benchmark]
public Task PublishNotification_MediatR()
{
if (Lifetime == HandlerLifetime.Scoped)
{
return PublishScopedMediatRNotificationAsync(_serviceProvider, _notification, CancellationToken.None);
}

return _publisher!.Publish(_notification, CancellationToken.None);
}
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/// <summary>
/// 按生命周期把 benchmark notification handler 注册到 GFramework 容器。
/// </summary>
/// <param name="container">当前 benchmark 拥有并负责释放的容器。</param>
/// <param name="lifetime">待比较的 handler 生命周期。</param>
private static void RegisterGFrameworkHandler(MicrosoftDiContainer container, HandlerLifetime lifetime)
{
ArgumentNullException.ThrowIfNull(container);

switch (lifetime)
{
case HandlerLifetime.Singleton:
container.RegisterSingleton<GFramework.Cqrs.Abstractions.Cqrs.INotificationHandler<BenchmarkNotification>, BenchmarkNotificationHandler>();
return;

case HandlerLifetime.Scoped:
container.RegisterScoped<GFramework.Cqrs.Abstractions.Cqrs.INotificationHandler<BenchmarkNotification>, BenchmarkNotificationHandler>();
return;

case HandlerLifetime.Transient:
container.RegisterTransient<GFramework.Cqrs.Abstractions.Cqrs.INotificationHandler<BenchmarkNotification>, BenchmarkNotificationHandler>();
return;

default:
throw new ArgumentOutOfRangeException(nameof(lifetime), lifetime, "Unsupported benchmark handler lifetime.");
}
}

/// <summary>
/// 将 benchmark 生命周期映射为 MediatR 组装所需的 <see cref="ServiceLifetime" />。
/// </summary>
/// <param name="lifetime">待比较的 handler 生命周期。</param>
private static ServiceLifetime ResolveMediatRLifetime(HandlerLifetime lifetime)
{
return lifetime switch
{
HandlerLifetime.Singleton => ServiceLifetime.Singleton,
HandlerLifetime.Scoped => ServiceLifetime.Scoped,
HandlerLifetime.Transient => ServiceLifetime.Transient,
_ => throw new ArgumentOutOfRangeException(nameof(lifetime), lifetime, "Unsupported benchmark handler lifetime.")
};
}

/// <summary>
/// 在真实的 publish 级作用域内执行一次 GFramework.CQRS notification 分发。
/// </summary>
/// <param name="runtime">复用的 scoped benchmark runtime。</param>
/// <param name="scopedContainer">负责为每次 publish 激活独立作用域的只读容器适配层。</param>
/// <param name="notification">要发布的 notification。</param>
/// <param name="cancellationToken">取消令牌。</param>
/// <returns>代表当前 publish 完成的值任务。</returns>
/// <remarks>
/// notification lifetime benchmark 只关心 handler 解析和 publish 本身的热路径,
/// 因此这里复用同一个 runtime,但在每次调用前后显式创建并释放新的 DI 作用域,
/// 让 scoped handler 真正绑定到 publish 边界。
/// </remarks>
private static async ValueTask PublishScopedGFrameworkNotificationAsync(
ICqrsRuntime runtime,
ScopedBenchmarkContainer scopedContainer,
BenchmarkNotification notification,
CancellationToken cancellationToken)
{
ArgumentNullException.ThrowIfNull(runtime);
ArgumentNullException.ThrowIfNull(scopedContainer);
ArgumentNullException.ThrowIfNull(notification);

using var scopeLease = scopedContainer.EnterScope();
await runtime.PublishAsync(BenchmarkContext.Instance, notification, cancellationToken).ConfigureAwait(false);
}

/// <summary>
/// 在真实的 publish 级作用域内执行一次 MediatR notification 分发。
/// </summary>
/// <param name="rootServiceProvider">当前 benchmark 的根 <see cref="ServiceProvider" />。</param>
/// <param name="notification">要发布的 notification。</param>
/// <param name="cancellationToken">取消令牌。</param>
/// <returns>代表当前 publish 完成的任务。</returns>
/// <remarks>
/// 这里显式从新的 scope 解析 <see cref="IPublisher" />,确保 <c>Scoped</c> handler 与依赖绑定到 publish 边界。
/// </remarks>
private static async Task PublishScopedMediatRNotificationAsync(
ServiceProvider rootServiceProvider,
BenchmarkNotification notification,
CancellationToken cancellationToken)
{
ArgumentNullException.ThrowIfNull(rootServiceProvider);
ArgumentNullException.ThrowIfNull(notification);

using var scope = rootServiceProvider.CreateScope();
var publisher = scope.ServiceProvider.GetRequiredService<IPublisher>();
await publisher.Publish(notification, cancellationToken).ConfigureAwait(false);
}

/// <summary>
/// Benchmark notification。
/// </summary>
/// <param name="Id">通知标识。</param>
public sealed record BenchmarkNotification(Guid Id) :
GFramework.Cqrs.Abstractions.Cqrs.INotification,
MediatR.INotification;

/// <summary>
/// 同时实现 GFramework.CQRS 与 MediatR 契约的最小 notification handler。
/// </summary>
public sealed class BenchmarkNotificationHandler :
GFramework.Cqrs.Abstractions.Cqrs.INotificationHandler<BenchmarkNotification>,
MediatR.INotificationHandler<BenchmarkNotification>
{
/// <summary>
/// 处理 GFramework.CQRS notification。
/// </summary>
/// <param name="notification">当前要处理的 notification。</param>
/// <param name="cancellationToken">取消令牌。</param>
/// <returns>代表当前 notification 处理完成的值任务。</returns>
public ValueTask Handle(BenchmarkNotification notification, CancellationToken cancellationToken)
{
ArgumentNullException.ThrowIfNull(notification);
cancellationToken.ThrowIfCancellationRequested();
return ValueTask.CompletedTask;
}

/// <summary>
/// 处理 MediatR notification。
/// </summary>
Task MediatR.INotificationHandler<BenchmarkNotification>.Handle(
BenchmarkNotification notification,
CancellationToken cancellationToken)
{
ArgumentNullException.ThrowIfNull(notification);
cancellationToken.ThrowIfCancellationRequested();
return Task.CompletedTask;
}
}
}
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