XA (“eXtended Architecture”) is an X/Open group standard for accessing several back-end data stores within the same global transaction. The specification governs how a transaction manager (such as Atomikos®) can tell a database what work is going on as part of what transaction, and how to conduct the two-phase commit protocol at the end of each transaction. Also included is how to recover pending transactions from the data store.

Distributed Transaction, Two-phase commit (2PC)

• XADisk enables transactional access to file-systems, supporting both local and XA transactions.
• Atomic File Transaction with Spring
• Commons Transaction - JTA Compliant
• (Xa)Transactions distribuées avec Atomikos
• What is XA on Atomikos website