internal void GetCancellationTrace(TraceGroup traceGroup)
{
// This handler should only be invoked once (unless the CA is in a loop).
_currentIterationCount++;
if (_currentIterationCount > _hintIterationCount)
{
return;
}
// Attempt to process through the provided compensation activity to pick up the traces
if (_cancellation != null)
{
_cancellation.GetTrace(traceGroup);
}
// Additionally, if there are any hints, trace these as well...
// Scenario1: There are just hints but no compensation activity -- hints control all the work
// Scenario2: There is a compensation activity which does work but there is work remaining afterwards -- hints control the remaining work
foreach (Directive directive in this.CompensationHint)
{
TestActivity target = FindChildActivity(directive.Name);
TestCompensableActivity.ProcessDirective(target, directive, Directive.Compensate, traceGroup);
}
}
private void HandleError(TraceGroup traceGroup)
{
// Use the expected hints to get the compensation traces for each
foreach (Directive directive in this.CompensationHint)
{
TestActivity target = FindChildActivity(directive.Name);
TestCompensableActivity.ProcessDirective(target, directive, Directive.Compensate, traceGroup);
}
}
//
// Example hint list describing 3 branches and the order of processing for CA's on each Branch
// { Branch, CA2, CA1, Branch, CA3, Branch, CA6, CA5, CA4 }
//
private void ProcessCompensationHints(IList <Directive> hints, string defaultAction, TraceGroup traceGroup)
{
// A splited flowchart Confirmation/Compensation are collections of unordered branch traces
// (similar to Parallel)
UnorderedTraces unordered = new UnorderedTraces();
OrderedTraces ordered = null;
foreach (Directive directive in hints)
{
// If we encounter a Branch directive that means we need to start a new OrderedTraces group
if (directive.Name == "Branch")
{
if (ordered != null) // Already had one, so add it to our collection before we create a new one
{
if (ordered.Steps.Count > 0) // There's a chance we didn't produce any output
{
unordered.Steps.Add(ordered);
}
}
ordered = new OrderedTraces();
}
else
{
TestActivity target = FindChildActivity(directive.Name);
TestCompensableActivity.ProcessDirective(target, directive, defaultAction, traceGroup);
}
}
// Was there one left over? (From the last branch directive)
if (ordered != null)
{
if (ordered.Steps.Count > 0) // There's a chance we didn't produce any output
{
unordered.Steps.Add(ordered);
}
}
if (unordered.Steps.Count > 0)
{
traceGroup.Steps.Add(unordered);
}
}