title: Notification when Spring starts a transaction?
body: <p>I'd like to be notified when Spring <em>starts</em> a transaction. I'm aware of <code>org.springframework.transaction.support.TransactionSynchronizationManager</code> but afaik you can only use it to get notified of the transaction phases that defined in <code>org.springframework.transaction.event.TransactionPhase</code> (<code>BEFORE_COMMIT</code>, <code>AFTER_COMPLETION</code>, <code>AFTER_COMMIT</code>, <code>AFTER_ROLLBACK</code>). But how can I get notified just before or after a transaction has started?</p>