Is it real to use System.Transactions (primarily TransactionScope) across different AppDomains and processes?
DependentTransaction works only inside one AppDomain.
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Yes, it works. We are flowing transactions via WCF, calling out of process transactional COM+ components, and manually passing transactions from a .NET 2.0 asmx web service to a WCF service.
Now that is not to say that the setup is not finicky. I think most of the issues were around getting MSDTC set up properly on all the servers.
UPDATE
We don't use DependentClone. We are passing the transaction as a byte array using GetTransactionFromTransmitterPropagationToken. Very similar to the second example of Propagating a Transaction Across AppDomains.
As an example:
Client:
public void CallOutOfProcessAndPassTransaction
{
Client client = new Client();
client.DoSomethingTransactional(
System.Transactions.TransactionInterop.GetTransmitterPropagationToken(
System.Transactions.Transaction.Current)
);
}
Service:
public void DoSomethingTransactional(byte[] tx)
{
using (TransactionScope ts = new TransactionScope(
TransactionInterop.GetTransactionFromTransmitterPropagationToken(tx)))
{
// Do Something
// vote to commit the transaction if the caller also agrees
ts.Complete();
}
}
Randy Levy
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Could please tell more about the process of passing transaction to another AppDomain? Do you create clone by calling currentTransaction.DependentClone and pass it or just pass current transaction? – SiberianGuy Mar 18 '11 at 05:18
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And what about committing such a transaction? I guess I can commit it only from initial AppDomain? – SiberianGuy Mar 18 '11 at 05:56
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@ldsa: when you pass a Transaction across an appdomain you will be dealing with a distributed transaction. To commit the transaction all participants will have to vote to commit. e.g. appdomain1 and appdomain2 will both have to commit. – Randy Levy Mar 18 '11 at 06:10
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I found problems with this style of solution. In my case I was doing work in the parent and multiple children. To get it to work I had to use TransactionScope only in the parent. My own question/answer are at Using transactions across processes .
