static ISagaStep getNextStep(
ISagaAction sagaAction,
ISagaStep step,
SagaExecutionState sagaState)
{
ISagaStep nextStepForWhile = getNextStepForWhile(sagaAction, step);
if (nextStepForWhile != null)
{
return(nextStepForWhile);
}
// szukamy kolejnego kroku
ISagaStep nextStep = GetNextStepElsewhere(
sagaAction.ChildSteps,
step);
// sprawdzenie czy rodzic to ELSE
nextStep = getNextStepForElse(
sagaAction,
nextStep,
sagaState);
return(nextStep);
}
static NextStepInfo getNextStepForIf(
ISagaAction sagaAction,
ISagaStep step,
SagaExecutionState sagaState)
{
if (step.Is <ISagaStepForIf>())
{
IStepData currentStepData = sagaState.History.
GetLatestByStepName(step.StepName);
if (currentStepData?.ExecutionData?.ConditionResult == true)
{
return(new NextStepInfo {
NextStep = step.ChildSteps.GetFirstStep()
});
}
else
{
return(new NextStepInfo {
NextStep = GetNextStepElsewhere(sagaAction.ChildSteps, step)
});
}
}
return(null);
}
static bool getResultFromPrevIfElse(
SagaSteps childSteps,
ISagaStep step,
SagaExecutionState sagaState)
{
while (true)
{
ISagaStep prevStepIf = GetPrevStepSameLevel(childSteps, step.ParentStep, step);
if (prevStepIf.Is <ISagaStepForIf>())
{
IStepData stepDataIf = sagaState.History.
GetLatestByStepName(prevStepIf.StepName);
if (stepDataIf?.ExecutionData?.ConditionResult == true)
{
return(true);
}
if (!prevStepIf.Is <ISagaStepForElse>())
{
return(false);
}
step = prevStepIf;
}
else
{
return(false);
}
}
}
public static ISagaStep GetNextStepToExecute(
this ISagaAction sagaAction,
ISagaStep step,
SagaExecutionState sagaState)
{
NextStepInfo nextStepForWhile = getNextStepForWhile(sagaAction, step, sagaState);
if (nextStepForWhile != null)
{
return(nextStepForWhile.NextStep);
}
NextStepInfo nextStepForIf = getNextStepForIf(sagaAction, step, sagaState);
if (nextStepForIf != null)
{
return(nextStepForIf.NextStep);
}
NextStepInfo nextChildStep = getChildNextStep(step);
if (nextChildStep != null)
{
return(nextChildStep.NextStep);
}
return(getNextStep(sagaAction, step, sagaState));
}
static ISagaStep getNextStepForElse(
ISagaAction sagaAction,
ISagaStep step,
SagaExecutionState sagaState)
{
if (step.Is <ISagaStepForElse>())
{
bool ifElseResult = getResultFromPrevIfElse(
sagaAction.ChildSteps,
step,
sagaState);
// jesli if-else jest spelniony to nie wchodzimy juz do niego
// czyli szukamy kolengo kroku poza if-else
if (ifElseResult)
{
ISagaStep nextStepAfterIfElse = GetNextStepAfterIfElse(
sagaAction.ChildSteps,
step);
if (nextStepAfterIfElse != null)
{
return(nextStepAfterIfElse);
}
}
return(getNextStep(sagaAction, step, sagaState));
}
return(step);
}
public ExecutionContext(TSagaData data, SagaExecutionInfo info, SagaExecutionState state, SagaExecutionValues sagaExecutionValues, StepExecutionValues stepExecutionValues)
{
Data = data;
ExecutionInfo = info;
ExecutionState = state;
ExecutionValues = sagaExecutionValues;
StepExecutionValues = stepExecutionValues;
}
static public StepData SetSucceeded(this StepData data, SagaExecutionState state, IDateTimeProvider dateTimeProvider)
{
if (state.IsResuming)
{
data.ResumeData.SucceedTime = dateTimeProvider.Now;
}
else if (state.IsCompensating)
{
data.CompensationData.SucceedTime = dateTimeProvider.Now;
}
else
{
data.ExecutionData.SucceedTime = dateTimeProvider.Now;
}
return(data);
}
public StepData SetSucceeded(SagaExecutionState state, IDateTimeProvider dateTimeProvider)
{
if (state.IsResuming)
{
ResumeData.SucceedTime = dateTimeProvider.Now;
}
else if (state.IsCompensating)
{
CompensationData.SucceedTime = dateTimeProvider.Now;
}
else
{
ExecutionData.SucceedTime = dateTimeProvider.Now;
}
return(this);
}
static public StepData SetFailed(this StepData data, SagaExecutionState state, IDateTimeProvider dateTimeProvider, Exception error)
{
if (state.IsResuming)
{
data.ResumeData.Error = error.ToSagaStepException();
data.ResumeData.FailTime = dateTimeProvider.Now;
}
else if (state.IsCompensating)
{
data.CompensationData.Error = error.ToSagaStepException();
data.CompensationData.FailTime = dateTimeProvider.Now;
}
else
{
data.ExecutionData.Error = error.ToSagaStepException();
data.ExecutionData.FailTime = dateTimeProvider.Now;
}
return(data);
}
public StepData SetFailed(SagaExecutionState state, IDateTimeProvider dateTimeProvider, Exception error)
{
if (state.IsResuming)
{
ResumeData.Error = error.ToSagaStepException();
ResumeData.FailTime = dateTimeProvider.Now;
}
else if (state.IsCompensating)
{
CompensationData.Error = error.ToSagaStepException();
CompensationData.FailTime = dateTimeProvider.Now;
}
else
{
ExecutionData.Error = error.ToSagaStepException();
ExecutionData.FailTime = dateTimeProvider.Now;
}
return(this);
}