10.2.3. Transaction synchronization

Transaction synchronization provides callbacks for transaction-related events such as beforeCompletion() and afterCompletion(). By default, Seam uses its own transaction synchronization component, which requires explicit use of the Seam transaction component when committing transactions so that synchronization callbacks are correctly executed. If you work in a Java EE 5 environment, declare <transaction:ejb-transaction/> in components.xml to ensure that Seam synchronization callbacks are called correctly if the container commits a transaction outside Seam.