Transaction Control of Events

Go Up to Understanding the Event Mechanism

Events occur under transaction control, and can therefore be committed or rolled back. Interested applications do not receive notification of an event until the transaction from which the event is posted is committed. If a posted event is rolled back, notification does not occur.

A transaction can post the same event more than once before committing, but regardless of how many times an event is posted, it is regarded as a single event occurrence for purposes of event notification.