| /* |
| * Copyright (c) 2011, 2020 Oracle and/or its affiliates. All rights reserved. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // Contributors: |
| // James Sutherland - initial design and implementation |
| package org.eclipse.persistence.annotations; |
| |
| |
| /** |
| * 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 Cache#databaseChangeNotificationType() |
| * @see org.eclipse.persistence.descriptors.CachePolicy#setDatabaseChangeNotificationType(DatabaseChangeNotificationType) |
| * @author James Sutherland |
| * @since EclipseLink 2.4 |
| */ |
| public enum DatabaseChangeNotificationType { |
| /** |
| * No database change events will be processed. |
| */ |
| NONE, |
| |
| /** |
| * 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. |
| */ |
| INVALIDATE |
| } |
