MSMQ Transaction with COM (python)?

Question

I'm attempting to use MSMQ from Python using the win32com library, similar to this example. I'm able to put messages onto the queue, but in this case it's a transactional queue, so I need to create a transaction around the message send. Basically I'm attempting to do this VB example in python using COM.

I can't figure out how to get the transaction to happen:

import win32com.client
transaction=win32com.client.Dispatch("MSMQ.MSMQTransaction")
transaction.Begin()

gives:

AttributeError: MSMQ.MSMQTransaction.Begin

How do I begin the transaction? Am I on the right track?

For anyone needing the transaction, use `MSMQTransactionDispenser` and its `BeginTransaction` function, which returns an `MSMQTransaction` — mBardos, Feb 10 '21 at 15:13

score 4 · Answer 1 · answered Feb 24 '11 at 19:50

4

You don't need an MSMQtransaction object to send a transactional message to a transactional queue.
Just set the transaction parameter to MQ_SINGLE_MESSAGE when you call Send().

Cheers
John Breakwell

answered Feb 24 '11 at 19:50

John Breakwell

4,667
20
25

1

Thanks John. Now I just have to figure out how to get a hold of the MQ_SINGLE_MESSAGE constant in python/com. You don't happen to know its numerical value by chance? - nevermind, found it: win32com.client.contants.MQ_SINGLE_MESSAGE – Parand Feb 24 '11 at 19:56

MSMQ Transaction with COM (python)?

1 Answers1