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Callback methods are user defined methods that are attached to entity lifecycle events and are invoked automatically by JPA when these events occur. Internal Callback Methods Internal callback ... methods for any subset or combination of lifecycle events but no more than one callback method

an example, consider a real time system that detects events from various sensors and stores the details in a database. Each event is represented by an Event entity object that holds time, sensor ID and additional details. Suppose that queries that retrieve all the events of a specified sensor in

store separate entity for given event . Right now I'm using BaseEntity which contains @ElementCollection private Set activities; This way I can add events to given object without using EM to persist new ... final boolean onPreUpdate(PreUpdateEvent event ) {         try

Hello, is there a way that lifecycle events like prepersist or preupdate are also fired for embeddable classes, not just for entities? My case looks as follows: @Entity public class Foo { @Id ... ; objectArts objectArts JPA lifecycle events are not applicable for embeddable classes. You can set an event

This is not supported. You may be able to implement your own cross process event listeners based on the JPA event listeners if every process will listen to its own events and will report to other processes. support Support

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.

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This chapter explains how to manage ObjectDB databases using the Java Persistence API (JPA). The first two pages introduce basic JPA interfaces and concepts: The next section explains how to use JPA for database CRUD operations: More advanced topics (e.g. locking and events ) are discussed in the last section:

JPA defines dozens of annotations that can be divided into the following groups: Annotations for JPA aware classes: Annotations for fields in JPA persistable classes: Annotations for additional JPA configuration: Annotations for JPA lifecycle event callbacks: Java EE container annotations: Many

JPA defines three types of persistable classes which are set by the following annotations: Chapter 2 of the ObjectDB manual explains these annotations in detail. Entity and mapped super classes can be further configured by annotations that specify cache preferences and lifecycle event listener

. Arrays , including multidimensional arrays. Any other serializable type . Lifecycle Events JPA

. 4. Limitations In no event shall ObjectDB Software, ObjectDB authors, ObjectDB Software

JDO Method in javax.jdo.listener.LoadLifecycleListener void postLoad (    InstanceLifecycleEvent   event ) Invoked whenever a persistent instance is loaded from the data store. It is called after the method LoadCallback.jdoPostLoad is invoked on the persistent instance. Parameters: event - the load event . Since: JDO 2.0

JDO Method in javax.jdo.listener.StoreLifecycleListener void postStore (    InstanceLifecycleEvent   event ) Invoked whenever a persistent instance is stored, for example during javax ... have been stored. Parameters: event - the store event . Since: JDO 2.0

JDO Method in javax.jdo.listener.StoreLifecycleListener void preStore (    InstanceLifecycleEvent   event ) Invoked whenever a persistent instance is stored, for example during javax ... StoreCallback.jdoPreStore is invoked. Parameters: event - the store event . Since: JDO 2.0

JDO Method in javax.jdo.listener.DeleteLifecycleListener void preDelete (    InstanceLifecycleEvent   event ) Invoked whenever a persistent instance is deleted, for example ... . This method is called before the instance callback DeleteCallback.jdoPreDelete . Parameters: event - the delete event . Since: JDO 2.0

JDO Method in javax.jdo.listener.DeleteLifecycleListener void postDelete (    InstanceLifecycleEvent   event ) Invoked whenever a persistent instance is deleted, for example ... to persistent-deleted. Access to field values is not permitted. Parameters: event - the delete event . Since: JDO 2.0

JDO Method in javax.jdo.listener.CreateLifecycleListener void postCreate (    InstanceLifecycleEvent   event ) Invoked whenever an instance is made persistent via a call to javax.jdo.PersistenceManager.makePersistent or during persistence by reachability. Parameters: event - the create event . Since: JDO 2.0

JDO Method in javax.jdo.listener.ClearLifecycleListener void postClear (    InstanceLifecycleEvent   event ) This method is called after the ClearCallback.jdoPreClear method is invoked on the instance and the fields have been cleared by the JDO implementation. Parameters: event - the clear event . Since: JDO 2.0

JDO Method in javax.jdo.listener.ClearLifecycleListener void preClear (    InstanceLifecycleEvent   event ) This method is called before the implementation calls the instance method ... modified by the enhancer, so access to fields is not mediated. Parameters: event - the clear event . Since: JDO 2.0

JDO Method in javax.jdo.listener.AttachLifecycleListener void preAttach (    InstanceLifecycleEvent   event ) This method is called before a detached instance is attached ... . This method is called before the corresponding AttachCallback.jdoPreAttach on the detached instance. Parameters: event - the attach event . Since: JDO 2.0

JDO Method in javax.jdo.listener.AttachLifecycleListener void postAttach (    InstanceLifecycleEvent   event ) This method is called after a detached instance is attached ... after the corresponding AttachCallback.jdoPostAttach on the persistent instance. Parameters: event - the attach event . Since: JDO 2.0

JDO Method in javax.jdo.listener.DetachLifecycleListener void postDetach (    InstanceLifecycleEvent   event ) This method is called during the execution of javax.jdo ... .jdoPreDetach is called on the detached instance. Parameters: event - the detach event . Since: JDO 2.0

JDO Method in javax.jdo.listener.DetachLifecycleListener void preDetach (    InstanceLifecycleEvent   event ) This method is called during the execution of javax.jdo.PersistenceManager ... .jdoPreDetach is called on the instance to be detached. Parameters: event - the detach event . Since: JDO 2.0

The javax.jdo.InstanceCallbacks interface represents events in a persistent object's lifecycle. By implementing the InstanceCallbacks interface, a persistent class can handle these events . Four methods ... when the persistent fields are going to be cleared at transaction end (for example on rollback). This event is rarely

JDO Method in javax.jdo.spi.RegisterClassListener void registerClass (    RegisterClassEvent   event ) This method gets called when a persistence-capable class is registered. Parameters: event - a RegisterClassEvent instance describing the registered class plus metadata. Since: JDO 1.0

JDO Method in javax.jdo.listener.DirtyLifecycleListener void postDirty (    InstanceLifecycleEvent   event ) Invoked whenever a persistent instance is first made dirty, during an operation that modifies the value of a persistent or transactional field. Called after the value is changed. Since: JDO 2.0

JDO Method in javax.jdo.listener.DirtyLifecycleListener void preDirty (    InstanceLifecycleEvent   event ) Invoked whenever a persistent instance is first made dirty, during an operation that modifies the value of a persistent or transactional field. Called before the value is changed. Since: JDO 2.0

the environment, no lifecycle event validation takes place. This is the default behavior. Since: JPA 2.0 CALLBACK The persistence provider must perform the lifecycle event validation. It is an error ... provider must not perform lifecycle event validation. Since: JPA 2.0 Public Static Enum Methods

The following interfaces can be implemented by persistence capable classes in order to response to JDO lifecycle events :

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.

.listener.InstanceLifecycleEvent This is the event class used in life cycle event notifications. Note ...  type) Creates a new event object with the specified source and type . Parameters: source - the instance that triggered the event type - the event type Since: JDO 2.0 InstanceLifecycleEvent

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 ... after the field values have been stored. Parameters: event - the store event . Since: JDO 2.0 void preStore

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 ... after the instance transitions to persistent-deleted. Access to field values is not permitted. Parameters: event

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 ... . Parameters: event - the clear event . Since: JDO 2.0 void preClear ( InstanceLifecycleEvent   event

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 ... : event - the attach event . Since: JDO 2.0 void preAttach ( InstanceLifecycleEvent   event

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 ... DetachCallback.jdoPreDetach is called on the detached instance. Parameters: event - the detach event

the listener instance to the list of lifecycle event listeners. The classes parameter identifies all of the classes of interest. If the classes parameter is specified as null , events for all persistent ... event for which it implements the corresponding listenerInstance interface. Parameters: listener

, Class[] classes) Add the parameter listener to the list of instance lifecycle event ... all of the classes of interest. If the classes parameter is specified as null , events for all persistent classes and interfaces will be sent to the listener. The listener will be called for each event

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 store. It is called after the method LoadCallback.jdoPostLoad is invoked on the persistent instance. Parameters: event - the load event . Since: JDO 2.0

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 via a call to javax.jdo.PersistenceManager.makePersistent or during persistence by reachability. Parameters: event - the create event . Since: JDO 2.0

the parameter listener to the list of instance lifecycle event listeners set as the initial listeners for each ... parameter is specified as null , events for all persistent classes and interfaces will be sent to the listener. The listener will be called for each event for which it implements the corresponding

instance to the list of lifecycle event listeners. The classes parameter identifies all of the classes of interest. If the classes parameter is specified as null , events for all persistent classes and interfaces will be sent to listenerInstance . The listenerInstance will be called for each event

JDO Constructor in javax.jdo.listener.InstanceLifecycleEvent InstanceLifecycleEvent (   Object source,    int type ) Creates a new event object with the specified source and type . Parameters: source - the instance that triggered the event type - the event type Since: JDO 2.0

JDO Method in javax.jdo.listener.InstanceLifecycleEvent int getEventType () Returns the event type that triggered this event . Return: the event type Since: JDO 2.0

a new event object with the specified source , type , and target . Parameters: source - the instance that triggered the event type - the event type target - the "other" instance Since: JDO 2.0

JDO Interface RegisterClassListener Super Interfaces: EventListener A "RegisterClassEvent" event ... -capable class. Since: JDO 1.0 Public Methods void registerClass ( RegisterClassEvent   event ) This method gets called when a persistence-capable class is registered. Parameters: event

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 ... after the value is changed. Since: JDO 2.0 void preDirty ( InstanceLifecycleEvent   event ) Invoked