com.db4o.events

Interface EventRegistry

All Known Implementing Classes:

EventRegistryImpl

public interface EventRegistry

Provides the interface to register event handlers for ObjectContainer events.
EventRegistry methods represent events available for registering callbacks. An EventRegistry instance can be obtained from the EventRegistryFactory. EventRegistry registry = EventRegistryFactory.forObjectContainer(container); A new callback can be registered for an event with the following code: registry.created().addListener(new EventListener4(){...});

See Also:

EventRegistryFactory, EventListener4

Method Summary

Methods

Modifier and Type	Method and Description
Event4<ObjectInfoEventArgs>	activated() This event is fired after an object is activated.
Event4<CancellableObjectEventArgs>	activating() This event is fired before an object is activated.
Event4<ClassEventArgs>	classRegistered() This event is fired when a new class is registered with metadata.
Event4<ObjectContainerEventArgs>	closing() This event is fired when the ObjectContainer.close() is called.
Event4<CommitEventArgs>	committed() This event is fired after a transaction has been committed.
Event4<CommitEventArgs>	committing() This event is fired just before a transaction is committed.
Event4<ObjectInfoEventArgs>	created() This event is fired after an object is created (saved for the first time).
Event4<CancellableObjectEventArgs>	creating() This event is fired before an object is saved for the first time.
Event4<ObjectInfoEventArgs>	deactivated() This event is fired after an object is deactivated.
Event4	deactivating() This event is fired before an object is deactivated.
Event4<ObjectInfoEventArgs>	deleted() This event is fired after an object is deleted.
Event4<CancellableObjectEventArgs>	deleting() This event is fired before an object is deleted.
Event4<ObjectInfoEventArgs>	instantiated() This event is fired when a persistent object is instantiated.
Event4<ObjectContainerEventArgs>	opened() This event is fired when the ObjectContainer has finished its startup procedure.
Event4<QueryEventArgs>	queryFinished() This event is fired upon a query end and can be used to gather query statistics.
Event4<QueryEventArgs>	queryStarted() This event is fired upon a query start and can be used to gather query statistics.
Event4<ObjectInfoEventArgs>	updated() This event is fired after an object is updated.
Event4<CancellableObjectEventArgs>	updating() This event is fired before an object is updated.

Method Detail

queryStarted

Event4<QueryEventArgs> queryStarted()

This event is fired upon a query start and can be used to gather query statistics. The query object is available from QueryEventArgs event parameter.

Returns:

event

See Also:

QueryEventArgs

queryFinished

Event4<QueryEventArgs> queryFinished()

This event is fired upon a query end and can be used to gather query statistics. The query object is available from QueryEventArgs event parameter.

Returns:

event

See Also:

QueryEventArgs

creating

Event4<CancellableObjectEventArgs> creating()

This event is fired before an object is saved for the first time. The object can be obtained from CancellableObjectEventArgs event parameter. The action can be cancelled using CancellableObjectEventArgs.cancel()

Returns:

event

See Also:

CancellableObjectEventArgs, ObjectContainer.store(Object)

activating

Event4<CancellableObjectEventArgs> activating()

This event is fired before an object is activated. The object can be obtained from CancellableObjectEventArgs event parameter. The action can be cancelled using CancellableObjectEventArgs.cancel()

Returns:

event

See Also:

CancellableObjectEventArgs, ObjectContainer.activate(Object, int)

updating

Event4<CancellableObjectEventArgs> updating()

This event is fired before an object is updated. The object can be obtained from CancellableObjectEventArgs event parameter. The action can be cancelled using CancellableObjectEventArgs.cancel()

Returns:

event

See Also:

CancellableObjectEventArgs, ObjectContainer.store(Object)

deleting

Event4<CancellableObjectEventArgs> deleting()

This event is fired before an object is deleted. The object can be obtained from CancellableObjectEventArgs event parameter. The action can be cancelled using CancellableObjectEventArgs.cancel()

Note, that this event is not available in networked client/server mode and will throw an exception when attached to a client ObjectContainer.

Returns:

event

See Also:

CancellableObjectEventArgs, ObjectContainer.delete(Object)

deactivating

Event4 deactivating()

This event is fired before an object is deactivated. The object can be obtained from CancellableObjectEventArgs event parameter. The action can be cancelled using CancellableObjectEventArgs.cancel()

Returns:

event

See Also:

CancellableObjectEventArgs, ObjectContainer.deactivate(Object, int)

activated

Event4<ObjectInfoEventArgs> activated()

This event is fired after an object is activated. The object can be obtained from the ObjectInfoEventArgs event parameter.

The event can be used to trigger some post-activation functionality.

Returns:

event

See Also:

ObjectInfoEventArgs, ObjectContainer.activate(Object, int)

created

Event4<ObjectInfoEventArgs> created()

This event is fired after an object is created (saved for the first time). The object can be obtained from the ObjectInfoEventArgs event parameter.

The event can be used to trigger some post-creation functionality.

Returns:

event

See Also:

ObjectEventArgs, ObjectContainer.store(Object)

updated

Event4<ObjectInfoEventArgs> updated()

This event is fired after an object is updated. The object can be obtained from the ObjectInfoEventArgs event parameter.

The event can be used to trigger some post-update functionality.

Returns:

event

See Also:

ObjectInfoEventArgs, ObjectContainer.store(Object)

deleted

Event4<ObjectInfoEventArgs> deleted()

This event is fired after an object is deleted. The object can be obtained from the ObjectInfoEventArgs event parameter.

The event can be used to trigger some post-deletion functionality.

Note, that this event is not available in networked client/server mode and will throw an exception when attached to a client ObjectContainer.

Returns:

event

See Also:

ObjectEventArgs, ObjectContainer.delete(Object)

deactivated

Event4<ObjectInfoEventArgs> deactivated()

This event is fired after an object is deactivated. The object can be obtained from the ObjectInfoEventArgs event parameter.

The event can be used to trigger some post-deactivation functionality.

Returns:

event

See Also:

ObjectEventArgs, ObjectContainer.delete(Object)

committing

Event4<CommitEventArgs> committing()

This event is fired just before a transaction is committed. The transaction and a list of the modified objects can be obtained from the CommitEventArgs event parameter.

Committing event gives a user a chance to interrupt the commit and rollback the transaction.

Returns:

event

See Also:

CommitEventArgs, ObjectContainer.commit()

committed

Event4<CommitEventArgs> committed()

This event is fired after a transaction has been committed. The transaction and a list of the modified objects can be obtained from the CommitEventArgs event parameter.

The event can be used to trigger some post-commit functionality.

Returns:

event

See Also:

CommitEventArgs, ObjectContainer.commit()

instantiated

Event4<ObjectInfoEventArgs> instantiated()

This event is fired when a persistent object is instantiated. The object can be obtained from the ObjectInfoEventArgs event parameter.

Returns:

event

See Also:

ObjectInfoEventArgs

classRegistered

Event4<ClassEventArgs> classRegistered()

This event is fired when a new class is registered with metadata. The class information can be obtained from ClassEventArgs event parameter.

Returns:

event

See Also:

ClassEventArgs

closing

Event4<ObjectContainerEventArgs> closing()

This event is fired when the ObjectContainer.close() is called.

Returns:

event

opened

Event4<ObjectContainerEventArgs> opened()

This event is fired when the ObjectContainer has finished its startup procedure.

Returns:

event