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closing the EntityManagerFactory . To register a ServletContextListener : Open the [New Listener ... Other... Web Listener and clicking Next . The Java package name should be guest. Enter GuestListener ... All to enable the Finish button. Click Finish to create the new listener class. Now replace the content

Other... Select Web Web Application Listener and click Next . Enter GuestListener as the class name ... to create the new listener class. Now replace the content of the new source file with the following ... the servlet context - when the web application starts ( contextInitialized ). Retrieves

Hey, I have a problem to use SF with an Extended Persistence Context Regarding to Transactions. The need for an extended persistence Context emerges for the need to create queries in advance ... : The GuestDao is a SF with an extended persistence context . the GuestServlet holds reference to a SL called

for that operation. Listeners and External Callback Methods External callback methods are defined outside entity classes in a special listener class: public class MyListener { @PrePersist void ... (in a listener class) should always return void and take one argument that specifies the entity

The TPC/IP port on which the server listens for new connections is also specified in the Server ... application is represented by an icon in the Windows Tray. Right click the icon and use the context

. The Persistence Context The persistence context is the collection of all the managed objects of an EntityManager . If an entity object that has to be retrieved already exists in the persistence context ... context is to make sure that a database entity object is represented by no more than one in-memory

Every EntityManager owns a persistence context , which is a collection of all the entity objects that it manages. The persistence context serves as a first level cache. An attempt to retrieve ... the persistence context , rather than a newly instantiated entity object. The scope of the persistence

of the database. The persistence context serves as a cache of retrieved entity objects. If a requested entity object is not found in the persistence context a new object is constructed and filled ... is then added to the persistence context as a managed entity object and returned to the application

The following types can be used to implement external listener classes for JDO lifecycle events: Listener objects can be bound to one or more persistence capable classes by invoking the addInstanceLifecycleListner method either at the PersistenceManagerFactory level or the PersistenceManager level.

callback methods and listener classes . JDO callback methods and listener classes. Primary Keys

operations clear the entire EntityManager 's persistence context and detach all managed entity objects ... , which clears an EntityManager 's persistence context . Rolling back a transaction - either by invocation

the reference type for holding non dirty entities in the persistence context of the EntityManager ... entities are always held by strong references in the persistence context (until commit or flush

the context of string based JPQL queries. Criteria Query Expressions JPA query clauses are composed ... to the criteria query sections in pages that describe expressions in general, including in the context of string based JPQL queries.

. The functionality of the Edit  Delete command depends on the context . Deleting a reference field sets ... one of its instances in the viewer window (Table or Tree) and using the [Set View] context menu command.

The following annotations can mark methods as JPA callback methods: The Lifecycle Events section of the ObjectDB Manual explains how to use all these annotations on callback methods and with listener classes.

on which the server is listening for new connections. Usually the default port 6136 should be specified

a context listener class that will manage a JPA's EntityManagerFactory representing the ObjectDB database.

. But nevertheless, this class is a valid ObjectDB entity class, despite the warning. The next step is adding a context listener class that will manage a JPA's EntityManagerFactory representing the ObjectDB database.

configuration TCP port to listen to To start the server, use the start command: java com.objectdb ... when you extract a newer version of the ObjectDB server. The TPC port on which the server is listening ... with the stop and restart commands. However, in this context , you must use the same port number

, the call to getClass() should be replaced by some other expression (e.g. MyClass.class ) in a static context (i ... is expected to be running on a machine named host (could be domain name or ip address) and listening ... (the same machine) and listening to the default port (6136): Properties properties = new Properties

fields will be reflected in the data store. The context in which this call is made allows access

this method. The context in which this call is made does not allow access to other persistent JDO instances. Since: JDO 2.0

the equivalent context menu commands (right clicking the selected target element) or the equivalent ... a basic file manager. Using the toolbar and the context menus of this dialog box (right click the directory tree and the file list to open the context menus), you can copy, cut, paste, delete

; InstanceLifecycleListener   listener ,    Class[] classes ) Add the parameter listener to the list of instance lifecycle event listeners set as the initial listeners for each ... to the listener . The listener will be called for each event for which it implements the corresponding

;  InstanceLifecycleListener   listener ) Remove the parameter listener instance from the list of instance lifecycle event listeners set as the initial listeners for each PersistenceManager ... : listener - the listener instance to be removed Since: JDO 2.0

; InstanceLifecycleListener   listener ,    Class... classes ) Adds the listener instance to the list of lifecycle event listeners . The classes parameter identifies all of the classes ... for which it implements the corresponding listenerInstance interface. Parameters: listener

JDO Method in javax.jdo.PersistenceManager void removeInstanceLifecycleListener (    InstanceLifecycleListener   listener ) Removes the listener instance from the list of lifecycle event listeners . Parameters: listener - the listener instance to be removed Since: JDO 2.0

JDO Interface InstanceLifecycleListener All lifecycle listeners extend from this base interface. In order to minimize the impact on domain classes, instance callbacks can be defined to use a life-cycle listener pattern instead of having the domain class implement the callback interface(s). Since: JDO 2.0

JDO Interface StoreLifecycleListener Super Interfaces: InstanceLifecycleListener This interface is implemented by listeners to be notified of store events. Since: JDO 2.0 Public Methods void postStore ( InstanceLifecycleEvent  event) Invoked whenever a persistent instance is stored

JDO Interface LoadLifecycleListener Super Interfaces: InstanceLifecycleListener This interface is implemented by listeners to be notified of load events. Since: JDO 2.0 Public Methods void postLoad ( InstanceLifecycleEvent  event) Invoked whenever a persistent instance is loaded from the data

JDO Static Field in javax.jdo. listener .InstanceLifecycleEvent ATTACH Since: JDO 2.0

JDO Interface DeleteLifecycleListener Super Interfaces: InstanceLifecycleListener This interface is implemented by listeners to be notified of delete events. Since: JDO 2.0 Public Methods void postDelete ( InstanceLifecycleEvent  event) Invoked whenever a persistent instance is deleted

JDO Interface CreateLifecycleListener Super Interfaces: InstanceLifecycleListener This interface is implemented by listeners to be notified of create events. Since: JDO 2.0 Public Methods void postCreate ( InstanceLifecycleEvent  event) Invoked whenever an instance is made persistent

JDO Interface ClearLifecycleListener Super Interfaces: InstanceLifecycleListener This interface is implemented by listeners to be notified of clear events. Since: JDO 2.0 Public Methods void postClear ( InstanceLifecycleEvent  event) This method is called after the ClearCallback.jdoPreClear

JDO Interface AttachLifecycleListener Super Interfaces: InstanceLifecycleListener This interface is implemented by listeners to be notified of attach events. Since: JDO 2.0 Public Methods void postAttach ( InstanceLifecycleEvent  event) This method is called after a detached instance

JDO Static Field in javax.jdo. listener .InstanceLifecycleEvent DELETE Since: JDO 2.0

JDO Static Field in javax.jdo. listener .InstanceLifecycleEvent CLEAR Since: JDO 2.0

JDO Static Field in javax.jdo. listener .InstanceLifecycleEvent DETACH Since: JDO 2.0

JDO Static Field in javax.jdo. listener .InstanceLifecycleEvent DIRTY Since: JDO 2.0

JDO Static Field in javax.jdo. listener .InstanceLifecycleEvent CREATE Since: JDO 2.0

JDO Class InstanceLifecycleEvent java.lang.Object ∟  java.util.EventObject ∟  javax.jdo. listener .InstanceLifecycleEvent This is the event class used in life cycle event notifications. Note that although InstanceLifecycleEvent inherits Serializable interface from EventObject, it is not

JDO Static Field in javax.jdo. listener .InstanceLifecycleEvent STORE Since: JDO 2.0

JDO Static Field in javax.jdo. listener .InstanceLifecycleEvent LOAD Since: JDO 2.0

JDO Interface DirtyLifecycleListener Super Interfaces: InstanceLifecycleListener This interface is implemented by listeners to be notified of dirty events. Since: JDO 2.0 Public Methods void postDirty ( InstanceLifecycleEvent  event) Invoked whenever a persistent instance is first made dirty

JDO Interface DetachLifecycleListener Super Interfaces: InstanceLifecycleListener This interface is implemented by listeners to be notified of detach events. Since: JDO 2.0 Public Methods void postDetach ( InstanceLifecycleEvent  event) This method is called during the execution of javax.jdo

javax.jdo.listener.DetachCallback

javax.jdo.listener.DeleteCallback

javax.jdo.listener.ClearCallback

javax.jdo.listener.AttachCallback

addInstanceLifecycleListener ( InstanceLifecycleListener   listener , Class... classes) Adds the listener instance to the list of lifecycle event listeners . The classes parameter identifies ... event for which it implements the corresponding listenerInstance interface. Parameters: listener