AddServiceTrainBus

The IServiceCollection registration that AddMediator performs: the train bus, the registry, discovery, execution, the concurrency limiter, the trusted scope, the startup checks, and every train found in the given assemblies. RegisterServiceTrains is the part of it that registers the trains alone.

Call AddMediator instead. AddServiceTrainBus does not register the MediatorConfiguration its own services and startup checks depend on, so a host built with it alone fails to resolve them. It is public, but it is not a standalone entry point.

Signatures

namespace Trax.Mediator.Extensions;
 
public static IServiceCollection AddServiceTrainBus(
    this IServiceCollection serviceCollection,
    ServiceLifetime serviceTrainLifetime = ServiceLifetime.Transient,
    params Assembly[] assemblies
)
 
public static IServiceCollection RegisterServiceTrains(
    this IServiceCollection services,
    ServiceLifetime serviceLifetime = ServiceLifetime.Transient,
    params Assembly[] assemblies
)

Returns: the IServiceCollection, for chaining.

Throws: ArgumentException for ServiceLifetime.Singleton, because a train instance carries the state of the run in progress. TrainException when a train implements two train interfaces, neither extending the other.

What AddServiceTrainBus registers

RegisterServiceTrains registers only the last row. Each train is registered under its own interface (the one deriving from IServiceTrain<TIn, TOut>), or under the closed IServiceTrain<TIn, TOut> when it has none; see How Discovery Works.

Package

dotnet add package Trax.Mediator