private IDispatcherEventPublisher DispatcherEventPublisher(SequencedEvent sequencedEvent, bool?runImmediately)
{
var publisher = _container.Resolve <IDispatcherEventPublisher>();
publisher.Publish(sequencedEvent.Event.EventData.Event, sequencedEvent.Event.Seq, runImmediately);
return(publisher);
}
private void ProcessEvent(bool exitAtEndOfStream, SequencedEvent sequencedEvent, bool includeImmediate)
{
if (FinishedReplayingEvents(exitAtEndOfStream, sequencedEvent))
{
Terminate();
}
Process(sequencedEvent, includeImmediate);
}
private void HandleError(SequencedEvent @event, Exception e, Action <Guid?> aggregateId)
{
AddAuditRecord(@event, e);
RecordException(@event, e);
TransferOthersInSequence(@event);
Logger.Error(String.Format("Error on event {0} {1} {2}", @event.EventType, @event.Sequence, e));
CallbackDispatcherOnAggregateIdFailure(@event, aggregateId);
}
private void Process(SequencedEvent sequencedEvent, bool includeImmediate)
{
if (sequencedEvent.AggregateId != LastBadAggregateId)
{
_errorReporter.ReportErrorForScope(sequencedEvent, () => _handlerExecutor.HandleSequencedEvent(sequencedEvent, includeImmediate? (bool?)null: false), UpdateLastFailedAggregateId);
}
else
{
_errorReporter.ReportErrorForScope(() => _errorQueueLoader.PushBack(sequencedEvent.Sequence));
}
}
private bool IsBadSequencedEvent(SequencedEvent sequencedEvent)
{
if (!LastBadAggregateId.HasValue)
{
return(false);
}
if (sequencedEvent == null)
{
return(false);
}
return(LastBadAggregateId.Value == sequencedEvent.AggregateId);
}
public void ReportErrorForScope(SequencedEvent @event, Action scope, Action <Guid?> aggregateId)
{
try
{
scope();
}
catch (EndOfEventStreamException)
{
Thread.Sleep(200);
Logger.Info("End of stream....");
}
catch (TargetInvocationException e)
{
var unrolledException = e.UnrollDynamicallyInvokedException();
try
{
if (SqlTransientExceptionDetector.IsTransient(unrolledException.SourceException))
{
AwaitInfrastructure();
return;
}
_transactor.ApplyTransactionForLambda(() => HandleError(@event, unrolledException.SourceException, aggregateId));
}
catch
{
Logger.Error("Unable to write exception to Database");
}
}
catch (Exception e)
{
try
{
if (SqlTransientExceptionDetector.IsTransient(e))
{
AwaitInfrastructure();
return;
}
_transactor.ApplyTransactionForLambda(() => HandleError(@event, e, aggregateId));
}
catch
{
Logger.Error("Unable to write exception to Database");
}
}
}
private void RecordException(SequencedEvent @event, Exception e)
{
var error = new EventHandlerError(@event.EventType, @event.Sequence, e);
if (LastError != null && LastError == error)
{
LastError.Increment();
_errorRepository.UpdateError(LastError);
Logger.Error(String.Format("Error on event {0} {1} (count : {2})", @event.EventType, @event.Sequence, LastError.Count));
}
else
{
_errorRepository.AddError(error);
LastError = error;
Logger.Error(String.Format("Error on event {0} {1} {2}", @event.EventType, @event.Sequence, e));
}
}
public void HandleSequencedEvent(SequencedEvent sequencedEvent, bool?runImmediately = true)
{
if (!sequencedEvent.HasEvent())
{
return;
}
IDispatcherEventPublisher publisher = null;
_transactor.ApplyTransactionForLambda(() =>
FinallyGuarded.Apply(() =>
{
publisher = DispatcherEventPublisher(sequencedEvent, runImmediately);
AuditLogStatus(sequencedEvent);
},
() =>
{
if (publisher != null)
{
_container.Release(publisher);
}
}));
}
private void AddAuditRecord(SequencedEvent @event, Exception e)
{
_auditRepository.Add(new EventHandlerAudit(@event.Event, DateTime.UtcNow, EventHandlerAuditResult.Failed, e.Message));
}
private void TransferOthersInSequence(SequencedEvent @event)
{
_errorQueueLoader.SeedFromIncluding(@event.Sequence, @event.AggregateId);
}
private static void CallbackDispatcherOnAggregateIdFailure(SequencedEvent @event, Action <Guid?> aggregateId)
{
aggregateId(@event.AggregateId);
}
private void PushEventImmediatelyToErrorQueue(SequencedEvent sequencedEvent)
{
_errorQueueLoader.PushBack(sequencedEvent.Sequence);
}
private static bool FinishedReplayingEvents(bool exitAtEndOfStream, SequencedEvent sequencedEvent)
{
return(exitAtEndOfStream && sequencedEvent != null && !sequencedEvent.HasEvent());
}
private static string BuildAuditSuccessMessage(SequencedEvent sequencedEvent)
{
return(String.Format("Processed Event: {0}, For {1} with Identity: {2}", sequencedEvent.Event.EventId, sequencedEvent.EventType, sequencedEvent.AggregateId));
}
private void AuditLogStatus(SequencedEvent sequencedEvent)
{
var audit = new EventHandlerAudit(sequencedEvent.Event, DateTime.UtcNow, EventHandlerAuditResult.Success, BuildAuditSuccessMessage(sequencedEvent));
_auditRepository.Add(audit);
}
