DatabaseEventListener (EclipseLink 2.7.14, API Reference)

All Known Subinterfaces:

DescriptorBasedDatabaseEventListener
```
public interface DatabaseEventListener
```
PUBLIC: Defines the API for integration with a database event notification service. This allows the EclipseLink cache to be invalidated by database change events. This is used to support Oracle DCN (Database Change event Notification), but could also be used by triggers or other services.

See Also:

DatabaseChangeNotificationType

Author:

James Sutherland

Since:

EclipseLink 2.4

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`initialize(ClassDescriptor descriptor, org.eclipse.persistence.internal.sessions.AbstractSession session)`	Initialize the descriptor to receive database change events.
`void`	`register(Session session)`	Register for database change events and invalidate the session's cache.
`void`	`remove(Session session)`	Remove registration from database change events.

- Method Detail
  - register
```
void register(Session session)
```
    Register for database change events and invalidate the session's cache. This is called on session login.
  - remove
```
void remove(Session session)
```
    Remove registration from database change events. This is called on session logout.
  - initialize
```
void initialize(ClassDescriptor descriptor,
                org.eclipse.persistence.internal.sessions.AbstractSession session)
```
    Initialize the descriptor to receive database change events. This is called when the descriptor is initialized.