About listener
Step 3: Add a Context Listener Class
Explains how to add a servlet context listener (to manage an application scope EntityManagerFactory) in an Eclipse Web Application.... a ServletContextListener : Open the [New Listener] dialog box by right clicking the guest package node (in the [Package ... window), selecting New > Other... > Web > Listener and clicking Next . The Java package name should be guest. ...
JPA Lifecycle Events
Explains how to use JPA lifecycle events (client side triggers) with callback methods and listener classes.... methods are defined outside entity classes in a special listener class: public class MyListener { ... } External callback methods (in a listener class) should always return void and take one argument that ... Object can be replaced by a more specific type). The listener class should be stateless and should have a public no-arg constructor ...
Step 3: Add a Context Listener Class
Explains how to add a servlet context listener (to manage an application scope EntityManagerFactory) in a NetBeans Web Application.... New > Other... Select Web > Web Application Listener and click Next . Enter GuestListener as the class ... be guest. Click Finish to create the new listener class. Now replace the content of the new source file ...
Advanced JPA Topics
Describes advanced JPA topics - detached entity objects, lock management and entity lifecycle events. This section discusses advanced JPA topics: Detached Entity Objects Locking in JPA JPA Lifecycle Events Shared (L2) Entity Cache JPA Metamodel API ...
JDO External Listeners
The following types can be used to implement external listener classes for JDO lifecycle events: javax.jdo.listener.AttachLifecycleListener javax.jdo.listener.ClearLifecycleListener ...
Entity listener - event instead of object
Hi, Currently I'm playing with entity listener to implement auditing with difference between values in updated entity. There is a problem however with accessing "old" version of object stored in database. I can't find the nice way to use EntityManager in EntityListener. Because of that, I can't store separate entity for given event. Right now I'm using BaseEntity which contains ... Hi, Currently I'm playing with entity listener to implement auditing with difference between values in updated ... Do you need to obtain an EntityManager from a listener class? You may use the JDO getPersistenceManager ... subscribed. The main problem for me was to get EM inside listener class. Hibernate uses Session instead of Object as method parameter ...
javax.persistence.EntityListeners
Specifies the callback listener classes to be used for an entity or mapped superclass.(Annotation of JPA)
javax.jdo.PersistenceManagerFactory
The PersistenceManagerFactory is the interface to use to obtain PersistenceManager instances.(Interface of JDO)
addInstanceLifecycleListener(listener, classes)
Add the parameter listener to the list of instance lifecycle event listeners set as the initial listeners for each PersistenceManager created by this PersistenceManagerFactory.(Method of javax.jdo.PersistenceManagerFactory)
javax.persistence.ExcludeSuperclassListeners
Specifies that the invocation of superclass listeners is to be excluded for the entity class (or mapped superclass) and its subclasses.(Annotation of JPA)
