UnambitiousFx.Synapse.Abstractions 1.0.0-beta6

Synapse

A lightweight, high-performance mediator implementation for .NET with first-class integration with Result types.

🔧 Compatibility & support

• Dependency-free at runtime: No external runtime dependencies.
• Native AOT-compatible: Designed to work well in Native AOT scenarios (see the examples/WebApiAot).
• Supported .NET versions: Supports Microsoft LTS releases and the latest non-LTS release. See CI matrix for exact versions.

🎯 Features

• Lightweight Mediator — Requests, commands, queries, and notifications with minimal allocations.
• Result-first — Uses UnambitiousFx.Functional Result for explicit error handling.
• Streaming requests — Built-in support for streaming request/response patterns.
• Pipeline Behaviors — Typed, untyped and conditional pipeline behaviors for requests and events.
• Dependency injection friendly — Register handlers and behaviours via a fluent configuration API (AddSynapse).
• Outbox support — Interfaces and helpers to implement the outbox pattern and reliable event publishing.
• Observability hooks — Metrics and tracing integration points to capture latency and publish metrics.
• Source generator — Optional code-generation to reduce allocations and simplify registration.
• Examples & benchmarks — Real-world examples and performance benchmarks included.

📦 Installation

dotnet add package UnambitiousFx.Synapse

🚀 Quick Start

Register mediator services

Register the synapse and your handlers in Program.cs:

builder.Services.AddSynapse(cfg =>
{
    cfg.AddRegisterGroup(new ManualRegisterGroup());

    // Request handlers
    cfg.RegisterRequestHandler<CreateTodoCommandHandler, CreateTodoCommand, Guid>()
        .RegisterRequestHandler<ListTodoQueryHandler, ListTodoQuery, IEnumerable<Todo>>();

    // Event handlers
    cfg.RegisterEventHandler<TodoUpdatedHandler, TodoUpdated>();

    // Pipeline behaviors
    cfg.RegisterRequestPipelineBehavior<SimpleLoggingBehavior>();
    cfg.RegisterEventPipelineBehavior<SimpleLoggingBehavior>();
});

Send requests

Use ISender to dispatch requests to handlers:

// Send a command that returns a value
var result = await sender.SendAsync<CreateTodoCommand, Guid>(command);

// Send a command without a response
var result = await sender.SendAsync<UpdateTodoCommand>(command);

// Stream results from an IStreamRequest
await foreach (var itemResult in sender.SendStreamAsync<ListItemsRequest, Item>(request))
{
    // itemResult is Result<Item>
}

Use handlers directly

You can also resolve IRequestHandler<TRequest, TResponse> or IRequestHandler<TRequest> from DI and call HandleAsync directly when appropriate.

📊 Observability & Metrics

Synapse exposes hooks for recording metrics and integrates with OpenTelemetry tracing through dedicated activity sources and metric interfaces. Consumers can provide their own ISynapseMetrics implementation or use the default which integrates with IMeterFactory.

🧪 Examples & Benchmarks

• Examples are under the examples/ folder (Web API, Console, Native AOT example).
• Benchmarks are available in benchmarks/SynapseBenchmark to measure throughput and compare against alternatives.

🧩 Extensibility

• Pipeline behaviors: implement IRequestPipelineBehavior, IEventPipelineBehavior, or the typed/stream variants.
• Registration groups: implement IRegisterGroup to modularize and share handler registration logic.
• Outbox & commits: implement IOutboxStorage, IOutboxCommit for transactional event persistence.

Note: Transport/distributed messaging APIs are intentionally not documented here — they may change prior to the first stable release.

🤝 Contributing

We welcome contributions! Please read CONTRIBUTING.md for standards, development setup, and the PR process.

📝 Release notes

See releases on GitHub for detailed changelogs and version history: https://github.com/UnambitiousFx/Synapse/releases

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

Made with ❤️ by the UnambitiousFx team