public static ISagaStep FindStepForExecutionStateAndEvent(
this ISagaActions actions, ISaga saga)
{
ISagaActions foundActions = actions.
FindActionsByState(saga.ExecutionState.GetExecutionState());
Type eventType = saga.ExecutionState.CurrentEvent.GetType();
if (saga.IsIdle() && !eventType.Is <EmptyEvent>())
{
return(FindStepForEventType(saga, eventType, foundActions));
}
return(FindStepForCurrentState(saga, foundActions));
}
static ISagaStep FindStepForEventType(
ISaga saga, Type eventType, ISagaActions actions)
{
ISagaAction action = actions.
FindActionByEventType(eventType);
if (action == null)
{
throw new SagaInvalidEventForStateException(saga.Data.ID, saga.ExecutionState.GetExecutionState(), eventType);
}
ISagaStep step = action.
ChildSteps.GetFirstStep();
if (step == null)
{
throw new SagaStepNotRegisteredException(saga.Data.ID, saga.ExecutionState.GetExecutionState(), saga.ExecutionState.CurrentStep);
}
return(step);
}
static ISagaStep FindStepForCurrentState(
ISaga saga, ISagaActions actions)
{
ISagaAction action = actions.
FindActionByStep(saga.ExecutionState.CurrentStep);
if (action == null)
{
throw new SagaStepNotRegisteredException(saga.Data.ID, saga.ExecutionState.GetExecutionState(), saga.ExecutionState.CurrentStep);
}
ISagaStep step = action.
GetStep(saga.ExecutionState.CurrentStep);
if (step == null)
{
throw new SagaStepNotRegisteredException(saga.Data.ID, saga.ExecutionState.GetExecutionState(), saga.ExecutionState.CurrentStep);
}
return(step);
}
public static ISagaActions FindActionsByState(
this ISagaActions actions, string state)
{
return(new SagaActions(
actions.Where(s => s.State == state)));
}
public static ISagaAction FindActionByStateAndEventType(
this ISagaActions actions, string state, Type eventType)
{
return(actions.
FirstOrDefault(action => action.State == state && action.Event == eventType));
}
public static ISagaAction FindActionByEventType(
this ISagaActions actions, Type eventType)
{
return(actions.
FirstOrDefault(action => action.Event == eventType));
}
public static ISagaAction FindActionByStep(
this ISagaActions actions, string step)
{
return(actions.
FirstOrDefault(action => action.GetStep(step) != null));
}
