File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Web Services and the fly likes Transaction scope Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Web Services
Bookmark "Transaction scope" Watch "Transaction scope" New topic

Transaction scope

Pankaj Kumarkk
Ranch Hand

Joined: Apr 17, 2011
Posts: 110
How do you design a consumer which calls 2 web services from different sources and then combine results from them to give a final result.
The question is that the consumer is responsible for transaction scope. So if one of the service call fails then the other service call should be reverted.
Any help will be appreciated
H Paul
Ranch Hand

Joined: Jul 26, 2011
Posts: 471
1. When I read this question, I told my self it's time to read those WS-* Even if I read it, I did not really understand them.
2. I guess the what would be involved for the sake of theory.

Distributed transactions with WS-AtomicTransaction and JTA

Ivan Krizsan
Ranch Hand

Joined: Oct 04, 2006
Posts: 2198
The pattern is called compensating transaction, I believe.
Briefly, it means that if service A makes some operation B available, then it should also make an operation C available that is able to revert the effect of invoking operation B.
This way, a client of service A can call operation B and, if things fail when invoking some other operation on the same or another service, operation C to restore the state in service A as it was before the operation B was called.
Best wishes!

My free books and tutorials:
I agree. Here's the link:
subject: Transaction scope
It's not a secret anymore!