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c# eventbus的最佳实践案例

c#
小樊
103
2024-07-18 04:44:50
栏目: 编程语言

EventBus 是一种用于在应用程序组件之间进行解耦通信的设计模式。在 C# 中,可以使用第三方库如 Prism、MediatR 或 NServiceBus 来实现 EventBus。以下是一个使用 MediatR 实现 EventBus 的最佳实践案例:

  1. 创建事件类:
public class UserRegisteredEvent : INotification
{
    public string Username { get; set; }
}
  1. 创建事件处理器类:
public class UserRegisteredHandler : INotificationHandler<UserRegisteredEvent>
{
    public Task Handle(UserRegisteredEvent notification, CancellationToken cancellationToken)
    {
        Console.WriteLine($"User {notification.Username} has been registered.");
        return Task.CompletedTask;
    }
}
  1. 注册事件处理器:
public void ConfigureServices(IServiceCollection services)
{
    services.AddMediatR(typeof(Startup));
    services.AddTransient<INotificationHandler<UserRegisteredEvent>, UserRegisteredHandler>();
}
  1. 触发事件:
public class UserService
{
    private readonly IMediator _mediator;

    public UserService(IMediator mediator)
    {
        _mediator = mediator;
    }

    public async Task RegisterUser(string username)
    {
        // Register user logic

        await _mediator.Publish(new UserRegisteredEvent { Username = username });
    }
}
  1. 使用事件处理器:
public class UserController : Controller
{
    private readonly UserService _userService;

    public UserController(UserService userService)
    {
        _userService = userService;
    }

    [HttpPost]
    public async Task<IActionResult> RegisterUser(string username)
    {
        await _userService.RegisterUser(username);
        return Ok();
    }
}

通过以上步骤,我们成功实现了 EventBus 的最佳实践案例,使得不同组件之间的通信更加灵活和解耦。

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