/// <summary>
/// Gets a saga instance with a specific correlation id if it is in a specific state.
/// If the instance is not yet in that state, waits for a certain amount of time.
/// Returns null if the instance can not be found or is not in the desired state.
/// </summary>
/// <param name="correlationId"></param>
/// <param name="state"></param>
/// <returns></returns>
private async Task <ISagaInstance <LifeState> > FindSagaInstance(Guid correlationId, State state)
{
ISagaInstance <LifeState> sagaInstance;
if (state == _machine.Final)
{ // Match doesn't seem to work with the Final state, check that by name
var startTime = DateTime.Now;
while (true)
{
Thread.Sleep(100);
sagaInstance = _sagaHarness.Sagas.FirstOrDefault(instance => instance.Saga.CurrentState == "Final");
if (sagaInstance != null)
{
break;
}
if (DateTime.Now - startTime > _testTimeout)
{
break;
}
}
;
}
else
{
// Wait till the saga instance transitions to the expected state - or fail after a timeout.
IList <Guid> matchingSagaIds = await _sagaHarness.Match(
x => x.CorrelationId == correlationId && x.CurrentState == state.Name,
_testTimeout);
if (matchingSagaIds.Count == 0)
{
return(null);
}
sagaInstance = _sagaHarness.Sagas.FirstOrDefault(i => i.Saga.CorrelationId == correlationId);
}
return(sagaInstance);
}
