public void ShouldFindSingleChild()
{
var continuation = new Continuation {Id = _job.Id};
var match = continuation.Find(_job);
Assert.Equal(continuation, match);
}
public void ReturnsTrueForContinuableContinuationsWithoutAnyFailureHandlers()
{
var continuation = new Continuation {Status = JobStatus.Poisoned, ContinueAfterHandlingFailure = true};
var result = continuation.CanContinue();
Assert.True(result);
}
public void ReturnsFalseIfAnyChildContinuationIsNotContinuable()
{
var continuation = new Continuation
{
Status = JobStatus.Created,
Children = new[] {new Continuation {Status = JobStatus.Poisoned}}
};
var result = continuation.CanContinue();
Assert.False(result);
}
public void ShouldFindNextContinuation()
{
var continuation = new Continuation
{
Id = Guid.NewGuid(),
Next = new Continuation {Id = _job.Id}
};
var match = continuation.Find(_job);
Assert.Equal(continuation.Next, match);
}
public void ShouldFindContinuationsInOnAnyFailure()
{
var continuation = new Continuation
{
Id = Guid.NewGuid(),
OnAnyFailed = new Continuation {Id = _job.Id}
};
var match = continuation.Find(_job);
Assert.Equal(continuation.OnAnyFailed, match);
}
public void ReturnsFalseIfAnyFailureHandlerIsFailed()
{
var continuation = new Continuation
{
Status = JobStatus.Poisoned,
ContinueAfterHandlingFailure = true,
OnAllFailed = new Continuation {Status = JobStatus.Poisoned}
};
var result = continuation.CanContinue();
Assert.False(result);
}
public void ReturnsNextIfAllContinuationsInGroupedIsComplete()
{
var continuation = new Continuation
{
Type = ContinuationType.Parallel,
Children = new[] {new Continuation {Status = JobStatus.Completed}},
Next = new Continuation()
};
var pending = continuation.PendingContinuations();
Assert.Equal(continuation.Next, pending.Single());
}
public void ReturnsFalseForGroupWithFailedChildrenAndFailedAnyFailureHandler()
{
var continuation = new Continuation
{
Status = JobStatus.Created,
Children = new[] {new Continuation {Status = JobStatus.Poisoned}},
ContinueAfterHandlingFailure = true,
OnAnyFailed = new Continuation {Status = JobStatus.Poisoned},
OnAllFailed = new Continuation {Status = JobStatus.Completed}
};
var result = continuation.CanContinue();
Assert.False(result);
}
public void ShouldFindContinuationsInGroup()
{
var matchingChild = new Continuation {Id = _job.Id};
var continuation = new Continuation
{
Children = new []
{
new Continuation { Id = Guid.NewGuid() },
matchingChild
}
};
var match = continuation.Find(_job);
Assert.Equal(matchingChild, match);
}
ConvertedActivity ConvertActivityGroupToContinuation(
ActivityGroup activityGroup,
Job parent,
IEnumerable<ExceptionFilter> inheritedExceptionFilters)
{
var jobs = Enumerable.Empty<Job>();
/*
* Activities in a group inherit exception filters defined
* in the group as well as the ones inherited by the group.
*/
var effectiveExceptionFilters = inheritedExceptionFilters.Concat(activityGroup.ExceptionFilters).ToArray();
var convertedItems =
activityGroup.Items.Select(item => ConvertCore(item, parent, effectiveExceptionFilters)).ToArray();
jobs = convertedItems.Aggregate(jobs, (current, converted) => current.Concat(converted.Jobs));
var continuation = new Continuation
{
Type = activityGroup.IsParallel ? ContinuationType.Parallel : ContinuationType.Sequence,
ContinueAfterHandlingFailure = activityGroup.CanContinueAfterHandlingFailure,
Children = convertedItems.Select(c => c.Continuation)
};
var onNext = ConvertCore(activityGroup.Next, parent, effectiveExceptionFilters);
continuation.Next = onNext.Continuation;
jobs = jobs.Concat(onNext.Jobs);
var onAnyFailed = ConvertCore(activityGroup.OnAnyFailed, parent, effectiveExceptionFilters);
continuation.OnAnyFailed = onAnyFailed.Continuation;
jobs = jobs.Concat(onAnyFailed.Jobs);
var onAllFailed = ConvertCore(activityGroup.OnAllFailed, parent, effectiveExceptionFilters);
continuation.OnAllFailed = onAllFailed.Continuation;
jobs = jobs.Concat(onAllFailed.Jobs);
var onCancelled = ConvertCore(activityGroup.OnCancel, parent, effectiveExceptionFilters);
if (onCancelled.Continuation != null)
onCancelled.Continuation.CompensateForCancellation = true;
continuation.OnCancelled = onCancelled.Continuation;
jobs = jobs.Concat(onCancelled.Jobs);
return new ConvertedActivity(continuation, jobs);
}
public void ReturnsNextIfAnyFailedContinuationHasCompletedRecoverableContinuation()
{
var continuation = new Continuation
{
Type = ContinuationType.Parallel,
Children = new[]
{
new Continuation {Status = JobStatus.Poisoned}
},
ContinueAfterHandlingFailure = true,
OnAnyFailed = new Continuation {Status = JobStatus.Completed},
Next = new Continuation()
};
var pending = continuation.PendingContinuations();
Assert.Equal(continuation.Next, pending.Single());
}
public static bool CanContinue(this Continuation item, bool isFailureHandler = false)
{
if (item.Children.Any()) // Is this a group?
{
var noOfSuccessfulChildren = item.Children.Count(c => c.CanContinue());
if (noOfSuccessfulChildren == item.Children.Count())
{
return(true);
}
// We come here if we've got at least one failing child.
// First make sure we can continue if we run our failure handlers.
if (!item.ContinueAfterHandlingFailure)
{
return(false);
}
// Have they all failed?
if (noOfSuccessfulChildren == 0)
{
return((item.OnAllFailed == null || item.OnAllFailed.CanContinue(true)) &&
(item.OnAnyFailed == null || item.OnAnyFailed.CanContinue(true)));
}
return(item.OnAnyFailed == null || item.OnAnyFailed.CanContinue(true));
}
// If this item is already completed we can continue if there's no next item or
// next item can also continue.
if (item.Status == JobStatus.Completed)
{
return(!isFailureHandler || item.Next == null || item.Next.CanContinue());
}
if (item.Status == JobStatus.Poisoned)
{
// We cannot continue if await does not handle failures
return(item.ContinueAfterHandlingFailure &&
(item.OnAllFailed == null || item.OnAllFailed.CanContinue(true)));
}
return(false);
}
ConvertedActivity ConvertActivityGroupToContinuation(
ActivityGroup activityGroup,
Job parent,
IEnumerable <ExceptionFilter> inheritedExceptionFilters)
{
var jobs = Enumerable.Empty <Job>();
/*
* Activities in a group inherit exception filters defined
* in the group as well as the ones inherited by the group.
*/
var effectiveExceptionFilters = inheritedExceptionFilters.Concat(activityGroup.ExceptionFilters).ToArray();
var convertedItems =
activityGroup.Items.Select(item => ConvertCore(item, parent, effectiveExceptionFilters)).ToArray();
jobs = convertedItems.Aggregate(jobs, (current, converted) => current.Concat(converted.Jobs));
var continuation = new Continuation
{
Type = activityGroup.IsParallel ? ContinuationType.Parallel : ContinuationType.Sequence,
ContinueAfterHandlingFailure = activityGroup.CanContinueAfterHandlingFailure,
Children = convertedItems.Select(c => c.Continuation)
};
var onNext = ConvertCore(activityGroup.Next, parent, effectiveExceptionFilters);
continuation.Next = onNext.Continuation;
jobs = jobs.Concat(onNext.Jobs);
var onAnyFailed = ConvertCore(activityGroup.OnAnyFailed, parent, effectiveExceptionFilters);
continuation.OnAnyFailed = onAnyFailed.Continuation;
jobs = jobs.Concat(onAnyFailed.Jobs);
var onAllFailed = ConvertCore(activityGroup.OnAllFailed, parent, effectiveExceptionFilters);
continuation.OnAllFailed = onAllFailed.Continuation;
jobs = jobs.Concat(onAllFailed.Jobs);
return(new ConvertedActivity(continuation, jobs));
}
public void ReturnsAllIncompleteContinuationsInGrouped()
{
var created = new Continuation { Status = JobStatus.Created };
var ready = new Continuation { Status = JobStatus.Ready };
var completed = new Continuation {Status = JobStatus.Completed};
var poisoned = new Continuation {Status = JobStatus.Poisoned};
var continuation = new Continuation
{
Type = ContinuationType.Parallel,
Children = new[] {created, completed, poisoned, ready}
};
var pending = continuation.PendingContinuations().ToArray();
Assert.Contains(created, pending);
Assert.Contains(ready, pending);
Assert.DoesNotContain(completed, pending);
Assert.DoesNotContain(poisoned, pending);
}
public Job(
Guid id,
Type type,
string method,
object[] arguments,
DateTime createdOn,
Guid? rootId = null,
Guid? parentId = null,
Guid? correlationId = null,
JobStatus status = JobStatus.Ready,
int dispatchCount = 0,
DateTime? retryOn = null,
ExceptionFilter[] exceptionFilters = null,
Continuation continuation = null,
bool? suspended = null)
{
if(type == null) throw new ArgumentNullException("type");
if (arguments == null) throw new ArgumentNullException("arguments");
if (string.IsNullOrWhiteSpace(method)) throw new ArgumentException("A valid method is required.");
Method = method;
Id = id;
Type = type;
Arguments = arguments;
CreatedOn = createdOn;
RootId = rootId ?? id;
ParentId = parentId;
CorrelationId = correlationId ?? id;
Status = status;
DispatchCount = dispatchCount;
RetryOn = retryOn;
Properties = new Dictionary<string, object>();
ExceptionFilters = exceptionFilters ?? new ExceptionFilter[0];
Continuation = continuation;
Suspended = suspended ?? false;
}
ConvertedActivity ConvertSingleActivityToContinuation(
SingleActivity singleActivity,
Job parent,
ExceptionFilter[] inheritedExceptionFilters)
{
var job = new Job(Guid.NewGuid(),
singleActivity.Type,
singleActivity.Name,
singleActivity.Arguments,
_now(),
rootId: parent.RootId,
parentId: parent.Id,
status: JobStatus.Created,
exceptionFilters: inheritedExceptionFilters.Concat(singleActivity.ExceptionFilters).ToArray());
var jobs = new List <Job>(new[] { job });
var continuation = new Continuation
{
Id = job.Id,
Type = ContinuationType.Single,
ContinueAfterHandlingFailure = singleActivity.CanContinueAfterHandlingFailure
};
var onNext = ConvertCore(singleActivity.Next, parent, inheritedExceptionFilters);
continuation.Next = onNext.Continuation;
jobs.AddRange(onNext.Jobs);
var onFailed = ConvertCore(singleActivity.OnFailed, parent, inheritedExceptionFilters);
continuation.OnAllFailed = onFailed.Continuation;
jobs.AddRange(onFailed.Jobs);
return(new ConvertedActivity(continuation, jobs.AsEnumerable()));
}
public void ReturnsTrueIfAllContinuationsInGroupAreCompleted()
{
var continuation = new Continuation
{
Status = JobStatus.Created,
Children = new[] {new Continuation {Status = JobStatus.Completed}}
};
var result = continuation.CanContinue();
Assert.True(result);
}
public void ShouldReturnNextInSequence()
{
var continuation = new Continuation
{
Type = ContinuationType.Sequence,
Children = new[]
{
new Continuation {Status = JobStatus.Completed},
new Continuation {Status = JobStatus.Created},
new Continuation {Status = JobStatus.Created}
}
};
var pending = continuation.PendingContinuations();
Assert.Equal(continuation.Children.ElementAt(1), pending.Single());
}
public void ReturnsTrueIfAllFailureHandlersAreCompleted()
{
var continuation = new Continuation
{
Status = JobStatus.Poisoned,
ContinueAfterHandlingFailure = true,
OnAnyFailed = new Continuation {Status = JobStatus.Completed},
OnAllFailed = new Continuation {Status = JobStatus.Completed}
};
var result = continuation.CanContinue();
Assert.True(result);
}
public void ShouldReturnAnyFailedContinuationIfAnyContinuationInGroupIsFailed()
{
var continuation = new Continuation
{
Type = ContinuationType.Parallel,
Children = new[]
{
new Continuation {Status = JobStatus.Poisoned}
},
OnAnyFailed = new Continuation()
};
var pending = continuation.PendingContinuations();
Assert.Equal(continuation.OnAnyFailed, pending.Single());
}
public void ShouldReturnAnyFailedHandlerWhenAnyItemFailsInSequence()
{
var continuation = new Continuation
{
Type = ContinuationType.Sequence,
Children = new[]
{
new Continuation {Status = JobStatus.Completed},
new Continuation {Status = JobStatus.Poisoned},
new Continuation {Status = JobStatus.Created}
},
OnAnyFailed = new Continuation()
};
var pending = continuation.PendingContinuations();
Assert.Equal(continuation.OnAnyFailed, pending.Single());
}
public ConvertedActivity(Continuation continuation, IEnumerable<Job> jobs)
{
if (jobs == null) throw new ArgumentNullException("jobs");
Continuation = continuation;
Jobs = jobs;
}
public void ShouldReturnAnyFailedContinuationIfAllContinuationsInGroupIsFailed()
{
var continuation = new Continuation
{
Type = ContinuationType.Parallel,
Children = new[]
{
new Continuation {Status = JobStatus.Poisoned},
new Continuation {Status = JobStatus.Poisoned}
},
OnAnyFailed = new Continuation(),
OnAllFailed = new Continuation()
};
var pending = continuation.PendingContinuations();
Assert.Contains(continuation.OnAnyFailed, pending);
}
public void ShouldNotReturnNextIfSingleContinuationIsCreated()
{
var continuation = new Continuation {Next = new Continuation()};
var pending = continuation.PendingContinuations();
Assert.Equal(continuation, pending.Single());
}
public void ShouldNotReturnNextIfSingleContinuationIsFailed()
{
var continuation = new Continuation {Status = JobStatus.Poisoned, Next = new Continuation()};
var pending = continuation.PendingContinuations();
Assert.Empty(pending);
}
public void ShouldNotReturnNextIfAllChilrenAreNotComplete()
{
var continuation = new Continuation
{
Children = new[]
{
new Continuation()
},
Next = new Continuation()
};
var pending = continuation.PendingContinuations();
Assert.DoesNotContain(continuation.Next, pending);
}
public void ShouldNotReturnNextIfAnyContinuationInGroupIsFailed()
{
var continuation = new Continuation
{
Type = ContinuationType.Parallel,
Children = new[]
{
new Continuation {Status = JobStatus.Completed},
new Continuation {Status = JobStatus.Poisoned}
},
Next = new Continuation()
};
var pending = continuation.PendingContinuations();
Assert.Empty(pending);
}
public void ShouldNotReturnAllFailedContinuationIfAllContinuationsInGroupIsNotFailed()
{
var continuation = new Continuation
{
Children = new[]
{
new Continuation {Status = JobStatus.Completed},
new Continuation {Status = JobStatus.Poisoned}
},
OnAllFailed = new Continuation()
};
var pending = continuation.PendingContinuations();
Assert.DoesNotContain(continuation.OnAllFailed, pending);
}
ConvertedActivity ConvertSingleActivityToContinuation(
SingleActivity singleActivity,
Job parent,
ExceptionFilter[] inheritedExceptionFilters)
{
var job = new Job(Guid.NewGuid(),
singleActivity.Type,
singleActivity.Name,
singleActivity.Arguments,
_now(),
rootId: parent.RootId,
parentId: parent.Id,
status: JobStatus.Created,
exceptionFilters: inheritedExceptionFilters.Concat(singleActivity.ExceptionFilters).ToArray());
var jobs = new List<Job>(new[] {job});
var continuation = new Continuation
{
Id = job.Id,
Type = ContinuationType.Single,
ContinueAfterHandlingFailure = singleActivity.CanContinueAfterHandlingFailure
};
var onNext = ConvertCore(singleActivity.Next, parent, inheritedExceptionFilters);
continuation.Next = onNext.Continuation;
jobs.AddRange(onNext.Jobs);
var onFailed = ConvertCore(singleActivity.OnFailed, parent, inheritedExceptionFilters);
continuation.OnAllFailed = onFailed.Continuation;
jobs.AddRange(onFailed.Jobs);
var onCancel = ConvertCore(singleActivity.OnCancel, parent, inheritedExceptionFilters);
if (onCancel.Continuation != null)
onCancel.Continuation.CompensateForCancellation = true;
continuation.OnCancelled = onCancel.Continuation;
jobs.AddRange(onCancel.Jobs);
return new ConvertedActivity(continuation, jobs.AsEnumerable());
}
public void ReturnsSingleIncompleteContinuation(JobStatus incompleteStatus)
{
var continuation = new Continuation {Status = incompleteStatus};
var pending = continuation.PendingContinuations();
Assert.Equal(continuation, pending.Single());
}
public static IEnumerable <Continuation> PendingContinuations(this Continuation item)
{
if (item == null)
{
return(Enumerable.Empty <Continuation>());
}
if (item.Type == ContinuationType.Single)
{
if (item.Status == JobStatus.Created || item.Status == JobStatus.Ready)
{
return new[] { item }
}
;
if (item.Status == JobStatus.Poisoned)
{
var failedHandler = item.OnAllFailed.PendingContinuations().ToArray();
if (!failedHandler.Any() && item.CanContinue())
{
return(item.Next.PendingContinuations());
}
return(failedHandler);
}
if (item.Status == JobStatus.Completed)
{
return(item.Next.PendingContinuations());
}
}
if (item.Type == ContinuationType.Parallel)
{
var children = item.Children.SelectMany(a => a.PendingContinuations()).ToArray();
if (children.Any())
{
return(children);
}
}
if (item.Type == ContinuationType.Sequence)
{
foreach (var child in item.Children)
{
var children = child.PendingContinuations().ToArray();
if (children.Any())
{
return(children);
}
if (!child.CanContinue())
{
break;
}
}
}
var anyFailureHandlers = Enumerable.Empty <Continuation>();
var allFailureHandlers = Enumerable.Empty <Continuation>();
var failedChildren = item.Children.Where(c => !c.CanContinue()).ToArray();
if (failedChildren.Any())
{
anyFailureHandlers = item.OnAnyFailed.PendingContinuations();
}
if (failedChildren.Length == item.Children.Count())
{
allFailureHandlers = item.OnAllFailed.PendingContinuations();
}
var resultArray = anyFailureHandlers.Concat(allFailureHandlers).ToArray();
return(resultArray.Any()
? resultArray
: item.CanContinue() ? item.Next.PendingContinuations() : Enumerable.Empty <Continuation>());
}
public void ShouldNotReturnNextInSequenceIfCurrentIsFailed()
{
var continuation = new Continuation
{
Type = ContinuationType.Sequence,
Children = new[]
{
new Continuation {Status = JobStatus.Completed},
new Continuation {Status = JobStatus.Poisoned},
new Continuation {Status = JobStatus.Created}
}
};
var pending = continuation.PendingContinuations();
Assert.Empty(pending);
}
public void ReturnsOnFailedContinuationIfSingleContinuationIsFailed()
{
var continuation = new Continuation {Status = JobStatus.Poisoned, OnAllFailed = new Continuation()};
var pending = continuation.PendingContinuations();
Assert.Equal(continuation.OnAllFailed, pending.Single());
}
public void ReturnsNextIfSingleContinuationIsCompleted()
{
var continuation = new Continuation {Status = JobStatus.Completed, Next = new Continuation()};
var pending = continuation.PendingContinuations();
Assert.Equal(continuation.Next, pending.Single());
}