JBoss Weld CDI for Java Platform

Observing events in different transaction phases

If an observer method wishes to receive events as part of the before or after completion phases of a transaction in which the event was fired, they are referred to as transactional observer methods.

We could incorporate the transaction phase into our preceding observer with the following:

public void refreshOnBookRemoval
  (@Observes( during = AFTER_SUCCESS ) @Removed Book bk) { ... }

The possible values for during are defined on javax.enterprise.event.TransactionPhase. In the context of a transactional observer method, the values for TransactionPhase have the following meanings:

• IN_PROGRESS: An observer method is called immediately. As this is the default value for all observers, there is no need to ...