With the proliferation of 3 tier web architecture and easy to program and deploy languages like Java, XA technology is once again in the front and center of business computing. XA is very important in these environments because it ensures integrity of complex distributed business transactions, which use multiple computing environments like databases, message servers, queues etc. With the built-in support for atomicity across asynchronous data processing models, it is hard to do web commerce without touching on some aspects of XA transaction. This paper shows at Fannie Mae how they managed to achieve a throughput of over 1 million financial transactions per hour using XA.
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