private static string GetText(IncomingMessage message)
{
return string.Format(message.ProcessingRequirements == MessageProcessingRequirements.RequiresExisting
? "Expected to find existing aggregate with ID {0}"
: "Expected to find no aggregates with ID {0}",
message.ReceiverId);
}
private static IMessagingAggregateRoot GetReceiver(IUnitOfWorkContext work, IncomingMessage message)
{
var existingReceiver = (IMessagingAggregateRoot)work.GetById(message.ReceiverType, message.ReceiverId, null);
CheckProcessingRequirements(message, existingReceiver);
return existingReceiver ?? CreateNewAggregateInstance(message.ReceiverType, message.ReceiverId);
}
private static void CheckProcessingRequirements(IncomingMessage message, object existingReceiver)
{
if (ExpectedNoneButFoundOne(message, existingReceiver) ||
ExpectedOneButFoundNone(message, existingReceiver))
{
throw new MessageProcessingRequirementsViolationException(message);
}
}
public object GetRelatedMessage(IncomingMessage messageBeingProcessed)
{
if (messageBeingProcessed.RelatedMessageId.HasValue)
{
var relatedEvent = _sentMessages.FirstOrDefault(x => x.Message.MessageId == messageBeingProcessed.RelatedMessageId.Value);
return relatedEvent != null
? relatedEvent.Message.Payload
: null;
}
return null;
}
public MessageReceivedEvent(DateTime receiveTime, IncomingMessage message)
{
ReceiveTime = receiveTime;
Message = message;
}
private static bool ExpectedNoneButFoundOne(IncomingMessage message, object existingReceiver)
{
return existingReceiver != null && message.ProcessingRequirements == MessageProcessingRequirements.RequiresNew;
}
public MessageProcessingRequirementsViolationException(IncomingMessage message)
: base(GetText(message))
{
}
public bool WasAlreadyProcessed(IncomingMessage messageToBeProcessed)
{
return _receivedMessages.Any(x => x.Message.MessageId == messageToBeProcessed.MessageId);
}
public void OnEndMessageProcessing()
{
_messageBeingProcessed = null;
}
public void OnBeginMessageProcessing(IncomingMessage messageBeingProcessed)
{
_messageBeingProcessed = messageBeingProcessed;
}
public MessageReceivedEvent(DateTime receiveTime, IncomingMessage message)
{
ReceiveTime = receiveTime;
Message = message;
}
private static bool ExpectedNoneButFoundOne(IncomingMessage message, object existingReceiver)
{
return(existingReceiver != null && message.ProcessingRequirements == MessageProcessingRequirements.RequiresNew);
}
private static IMessageProcessor CreateProcessor(IncomingMessage message)
{
Type processorType = typeof(MessageProcessor <>).MakeGenericType(message.Payload.GetType());
return((IMessageProcessor)Activator.CreateInstance(processorType));
}
public MessageProcessingRequirementsViolationException(IncomingMessage message)
: base(GetText(message))
{
}
