Java Persistence API

Lifecycle Events

The supported lifecycle events are PrePersist, PostPersist, PreRemove, PostRemove, PreUpdate, PostUpdate, and PostLoad
An entity may define its own lifecycle callback methods (subclasses my override)

Callback Methods Example

An entity listener may be used to monitor lifecycle events
Entity listeners are invoked before entity callback methods (hierarchy is observed)

Entity Listener Example

  @Entity
  @EntityListeners(EntityListener.class)
  public class EntityClass {
    ...
    @PostPersist
    public void postPersistEntity() { // This gets called second!
    }
  }

  public class EntityListener {
    ...
    @PostPersist
    public void postPersistListener() { // This gets called first!
    }
    ...
  }

Entity listeners can be "excluded" by subclasses

Listener Exclusion Example