| /* |
| * Copyright (c) 2013, 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: |
| // Oracle - initial API and implementation |
| |
| package org.eclipse.persistence.config; |
| |
| |
| /** |
| * Commit order type persistence property values. |
| * |
| * <p>JPA persistence property Usage: |
| * |
| * <p><code>properties.add(PersistenceUnitProperties.PERSISTENCE_CONTEXT_COMMIT_ORDER, CommitOrderType.Changes);</code> |
| * <p>Property values are case-insensitive. |
| * |
| * Defines the ordering of updates and deletes of a set of the same entity type during a commit or flush operation. |
| * The commit order of entities is defined by their foreign key constraints, and then sorted alphabetically.\ |
| * <p> |
| * By default the commit of a set of the same entity type is not ordered. |
| * <p> |
| * Entity type commit order can be modified using a DescriptorCustomizer and the ClassDescriptor.addConstraintDependency() API. |
| * Commit order can also be controlled using the EntityManager.flush() API. |
| */ |
| public class CommitOrderType { |
| /** Updates and deletes are ordered by the object's id. This can help avoid deadlocks on highly concurrent systems. */ |
| public static final String Id = "Id"; |
| /** Updates are ordered by the object's changes, then by id. This can improve batch writing efficiency. */ |
| public static final String Changes = "Changes"; |
| /** No ordering is done. */ |
| public static final String None = "None"; |
| |
| public static final String DEFAULT = Id; |
| } |
| |