/// <summary> /// Consumes the specified initiating message and creates a new instance of the correlating saga. /// <para>Saga is not persisted if operation have failed</para> /// </summary> /// <param name="initiatingMessage">The initiating message.</param> /// <returns> /// Result of the operation /// </returns> /// <exception cref="System.ArgumentException"></exception> public OperationResult Consume(IInitiatingSagaMessage initiatingMessage) { Guard.CheckSagaMessage(initiatingMessage, nameof(initiatingMessage)); var resolvedSaga = sagaFactory.ResolveSagaInititatedBy(initiatingMessage); var sagaType = resolvedSaga.GetType(); // try to find sagas that already exist var existingSaga = NSagaReflection.InvokeGenericMethod(sagaRepository, "Find", sagaType, initiatingMessage.CorrelationId); if (existingSaga != null) { throw new ArgumentException($"Trying to initiate the same saga twice. {initiatingMessage.GetType().Name} is Initiating Message, but saga of type {sagaType.Name} with CorrelationId {initiatingMessage.CorrelationId} already exists"); } // now create an instance of saga and persist the data var saga = sagaFactory.ResolveSaga(sagaType); NSagaReflection.Set(saga, "CorrelationId", initiatingMessage.CorrelationId); // if SagaData is null - create an instance of the object and assign to saga var sagaData = NSagaReflection.Get(saga, "SagaData"); if (sagaData == null) { var sagaDataType = NSagaReflection.GetInterfaceGenericType(saga, typeof(ISaga <>)); var newSagaData = Activator.CreateInstance(sagaDataType); NSagaReflection.Set(saga, "SagaData", newSagaData); } var sagaHeaders = NSagaReflection.Get(saga, "Headers"); if (sagaHeaders == null) { NSagaReflection.Set(saga, "Headers", new Dictionary <String, String>()); } pipelineHook.BeforeInitialisation(new PipelineContext(initiatingMessage, (IAccessibleSaga)saga)); var errors = (OperationResult)NSagaReflection.InvokeMethod(saga, "Initiate", initiatingMessage); pipelineHook.AfterInitialisation(new PipelineContext(initiatingMessage, (IAccessibleSaga)saga, errors)); if (errors.IsSuccessful) { sagaRepository.Save(saga); pipelineHook.AfterSave(new PipelineContext(initiatingMessage, (IAccessibleSaga)saga, errors)); } return(errors); }
public void ResolveByInitiated_Always_Resolves() { var result = Sut.ResolveSagaInititatedBy(new MySagaInitiatingMessage(Guid.NewGuid())); result.Should().NotBeNull().And.BeOfType <MySaga>(); }