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/*
* Copyright (c) 2013, 2018 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.
*
* JPA persistence property Usage:
*
*
properties.add(PersistenceUnitProperties.PERSISTENCE_CONTEXT_COMMIT_ORDER, CommitOrderType.Changes);
*
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.\
*
* By default the commit of a set of the same entity type is not ordered.
*
* 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;
}