I have a WCF logging service that runs operates over MSMQ. Items are logged to a Sql Server 2005 database. Every functions correctly if used outside a TransactionScope. When used inside a TransactionScope instance the call always causes the transaction to be aborted. Message = "The transaction has aborted".
What do I need to do to get this call to work inside a Transaction? Is it even possible. I've read that for a client transaction to flow across a service boundary the binding must support transaction flow, which immediately limits the bindings to only NetNamedPipeBinding, NetTcpBinding, WSHttpBinding, WSDualHttpBinding and WSFederationHttpBinding.
I'm not intimately knowledgeable about MSMQ, but there's a really good blog post series by Tom Hollander on MSMQ, IIS and WCF: Getting them to play nicely - in part 3 which is the link provided Tom talks about getting transactional.
MSMQ can be transactional - or not. And in WCF, you can decorate both the service contract as well as individual operation contracts (methods) with transaction-related attributes, such as whether to allow, disallow, or require a transaction context.
As far as I understand, in your setup, you don't want the MSMQ part to be transactional - but you should be able to use it even if an ambient transaction is present. In this case, you need to add the TransactionFlow="ALlowed" to your operation contract like this:
[ServiceContract]
public interface ILoggingService
{
[OperationContract]
[TransactionFlow(TransactionFlowOption.Allowed)]
void LogData(......);
}
That should do it!
Marc