Buzzard is a lightweight, fast, and extensible .NET library that implements the Mediator pattern — similar to MediatR — with full developer control and minimal overhead.

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✨ Features

• Request/Response messaging with IRequest<TResponse>
• Fire-and-forget notifications with INotification
• Clean, dependency-injection-first design
• No runtime reflection or complex setup
• Designed for performance and testability

📦 Installation

Install via NuGet:

dotnet add package Buzzard

🛠️ Getting Started

1. Configure Services

Register Buzzard in your Startup.cs or Program.cs:

services.AddBuzzard();

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2. Create a Request

public class GetUserQuery : IRequest<User>
{
    public int Id { get; set; }
}

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3. Implement the Handler

public class GetUserQueryHandler : IHandler<GetUserQuery, User>
{
    public Task<User> HandleAsync(GetUserQuery request, CancellationToken cancellationToken)
    {
        // Fetch from database or service
        return Task.FromResult(new User { Id = request.Id, Name = "Alice" });
    }
}

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4. Send a Request

var user = await _buzzardMediator.SendAsync(new GetUserQuery { Id = 1 });

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🔔 Notifications

Buzzard supports fire-and-forget notifications that can have multiple handlers.

1. Define a Notification

public class OrderPlaced : INotification
{
    public int OrderId { get; set; }
}

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2. Create Handlers

public class EmailHandler : INotificationHandler<OrderPlaced>
{
    public Task HandleAsync(OrderPlaced notification, CancellationToken cancellationToken)
    {
        // Send confirmation email
        return Task.CompletedTask;
    }
}

public class LogHandler : INotificationHandler<OrderPlaced>
{
    public Task HandleAsync(OrderPlaced notification, CancellationToken cancellationToken)
    {
        // Log the order
        return Task.CompletedTask;
    }
}

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3. Publish a Notification

await _buzzardMediator.PublishAsync(new OrderPlaced { OrderId = 123 });

Optionally choose the publish strategy:

await _buzzardMediator.PublishAsync(notification, PublishStrategy.Parallel);         // Background threads
await _buzzardMediator.PublishAsync(notification, PublishStrategy.ParallelWhenAll); // Waits for all
await _buzzardMediator.PublishAsync(notification, PublishStrategy.Sequential);      // Default

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✅ Unit Testing

Buzzard makes testing easy. You can test handlers directly:

var handler = new GetUserQueryHandler();
var result = await handler.HandleAsync(new GetUserQuery { Id = 1 }, CancellationToken.None);

Or mock IBuzzardMediator for higher-level tests.

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🤝 Contributing

Contributions are welcome! Feel free to open an issue or submit a pull request if you want to help improve Buzzard.

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📄 License

Buzzard is licensed under the MIT License.