/// <summary>
/// Create message handler delegate from CommandHandlerAttributeMethod and register to SingleMessageHandlerRegistration.
/// </summary>
/// <typeparam name="TCommand">Type of command.</typeparam>
/// <param name="registration">Message handler registration.</param>
/// <param name="messageHandlerDelegate">Message handler delegate built from a method marked with [CommandHandler] attribute.</param>
private static void registerMessageHandlerDelegate <TCommand>(SingleMessageHandlerRegistration registration,
MessageHandlerDelegate messageHandlerDelegate)
where TCommand : class
{
// Create delegate and register.
registration.Register <TCommand>(messageHandlerDelegate.Invoke);
}
/// <summary>
/// Register command handler.
/// </summary>
/// <typeparam name="TCommand">Type of command to be handled.</typeparam>
/// <param name="registration">Instance of SingleMessageHandlerRegistration.</param>
/// <param name="commandHandlerFactory">Factory which will provide an instance of a command handler that handles the specified <typeparamref name="TCommand"/> command.</param>
/// <param name="yieldExecution">True if execution of synchronous handler should be yielded. Otherwise, false.</param>
public static void RegisterCommandHandler <TCommand>(this SingleMessageHandlerRegistration registration,
Func <ICommandHandler <TCommand> > commandHandlerFactory)
where TCommand : class
{
if (registration == null)
{
throw new ArgumentNullException(nameof(registration));
}
if (commandHandlerFactory == null)
{
throw new ArgumentNullException(nameof(commandHandlerFactory));
}
MessageHandlerDelegate messageHandlerDelegate = CommandHandlerDelegateBuilder.FromCommandHandlerFactory(commandHandlerFactory);
registration.Register <TCommand>(messageHandlerDelegate.Invoke);
}