Question

I have a need to track he state change of a java entity class that uses MySQL as its database. I know the EntityManager has a mechanism to track state change for the entities it is managing. What I want is to access the entity state change. I want my application to fire an even to inform another application regarding the the new state of the entity. From what I gathered so far, there is no API that I can use to check the particular life-cycle an entity is in. Or is there?
Does any one have information on how to approach this?

Answer 1

JPA defines listener interfaces, that you can implement in order to be notified of lifecycle events for the entities.

Have a look at this article: http://www.objectdb.com/java/jpa/persistence/event