Table of Contents

Generated Recipient List

The generated recipient-list example shows event fan-out with both runtime fluent composition and an attribute-driven source-generated factory.

Register

using Microsoft.Extensions.DependencyInjection;
using PatternKit.Examples.DependencyInjection;

var services = new ServiceCollection()
    .AddGeneratedRecipientListExample();

using var provider = services.BuildServiceProvider(validateScopes: true);
var example = provider.GetRequiredService<GeneratedRecipientListExample>();

Fluent Path

var fluent = example.Runner.RunFluent();

The fluent path builds a RecipientList<GeneratedShipmentEvent> with predicates and handlers registered in code.

Source-Generated Path

var generated = example.Runner.RunGenerated();

The generated path uses [GenerateRecipientList] on a partial type and [RecipientListRecipient] on static recipient handlers. The generator emits a strongly typed factory that builds the same RecipientList<TPayload> used by the fluent API.

Production Shape

The TinyBDD scenarios validate that:

  • fluent and generated paths deliver the same recipients in deterministic order
  • handler side effects are visible through a scoped MessageContext
  • the example is importable through IServiceCollection
  • the example advertises dependency injection, messaging, and source-generation integration surfaces
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