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MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » Transactional Behaviour of Webservice/HTTP Node(s)

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sourdas2
PostPosted: Thu Jul 22, 2010 10:24 pm    Post subject: Transactional Behaviour of Webservice/HTTP Node(s) Reply with quote

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Joined: 21 Apr 2006
Posts: 90
Location: Kolkata,India
As per IBM Documentation - "A transaction is started for every type of input node, including user-defined input nodes"

Is SOAPInput Node and HTTPInput Node are transactional i.e can they start a transaction ? The property panel of these two node does not provide to the option to set Transaction Type as automatic, yes or no.
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mqjeff
PostPosted: Fri Jul 23, 2010 2:32 am    Post subject: Reply with quote

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Joined: 25 Jun 2008
Posts: 17447
HTTP as a protocol, and consequently Soap-over-http is non-transactional. I.e. there is no way in the protocol itself to retry a message without having the sender explicitly re-send it.

Likewise there's no way to unwrite or unread a file without explicitly rewriting or re-reading it.

All of the Broker input nodes will create a transactional scope for the flow itself, such that the execution of the flow will create a unit of work that will involve whatever transactional resources you want the flow to manage.

So if you start a flow with a FileInput node, you can configure it such that if the flow processing fails then all of the Database and MQ operations that you've performed are rolled back if the flow fails. But if you've told the FileInput node to delete the file, you don't get to magically recreate the file.
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