EclipseLink 2.4.2, build 'v20130514-5956486' API Reference

org.eclipse.persistence.annotations
Enum DatabaseChangeNotificationType

java.lang.Object
  extended by java.lang.Enum<DatabaseChangeNotificationType>
      extended by org.eclipse.persistence.annotations.DatabaseChangeNotificationType
All Implemented Interfaces:
java.io.Serializable, java.lang.Comparable<DatabaseChangeNotificationType>

public enum DatabaseChangeNotificationType
extends java.lang.Enum<DatabaseChangeNotificationType>

Configures what type of database change notification an entity/descriptor should use. This is only relevant if the persistence unit/session has been configured with a DatabaseEventListener, such as the OracleChangeNotificationListener that receives database change events. This allows for the EclipseLink cache to be invalidated or updated from database changes.

See Also:
Cache.databaseChangeNotificationType(), CachePolicy.setDatabaseChangeNotificationType(DatabaseChangeNotificationType)
Author:
James Sutherland
Since:
EclipseLink 2.4

Enum Constant Summary
INVALIDATE
          Invalidates the EclipseLink cache when a database change event is received for an object.
NONE
          No database change events will be processed.
 
Method Summary
static DatabaseChangeNotificationType valueOf(java.lang.String name)
          Returns the enum constant of this type with the specified name.
static DatabaseChangeNotificationType[] values()
          Returns an array containing the constants of this enum type, in the order they are declared.
 
Methods inherited from class java.lang.Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf
 
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait
 

Enum Constant Detail

NONE

public static final DatabaseChangeNotificationType NONE
No database change events will be processed.


INVALIDATE

public static final DatabaseChangeNotificationType INVALIDATE
Invalidates the EclipseLink cache when a database change event is received for an object. This requires a DatabaseEventListener to be configured with the persistence unit or session. This requires that the database change can be determine to affect the object, some database change events, such as the OracleChangeNotificationListener (Oracle DCN/QCN) only give the ROWID, so changes to secondary table or relationships may not be able to be determined to affect and object unless its version is also changed.

Method Detail

values

public static DatabaseChangeNotificationType[] values()
Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
for (DatabaseChangeNotificationType c : DatabaseChangeNotificationType.values())
    System.out.println(c);

Returns:
an array containing the constants of this enum type, in the order they are declared

valueOf

public static DatabaseChangeNotificationType valueOf(java.lang.String name)
Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:
name - the name of the enum constant to be returned.
Returns:
the enum constant with the specified name
Throws:
java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
java.lang.NullPointerException - if the argument is null

EclipseLink 2.4.2, build 'v20130514-5956486' API Reference