Package org.eclipse.persistence.config

Class CommitOrderType

java.lang.Object

org.eclipse.persistence.config.CommitOrderType

public class CommitOrderType
extends Object

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.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	Changes	Updates are ordered by the object's changes, then by id.
static final String	DEFAULT
static final String	Id	Updates and deletes are ordered by the object's id.
static final String	None	No ordering is done.

Constructor Summary

Constructors

Constructor	Description
CommitOrderType()

Method Summary

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

Id

public static final String Id

Updates and deletes are ordered by the object's id. This can help avoid deadlocks on highly concurrent systems.

See Also:

• Constant Field Values

Changes

public static final String Changes

Updates are ordered by the object's changes, then by id. This can improve batch writing efficiency.

See Also:

• Constant Field Values

None

public static final String None

No ordering is done.

See Also:

• Constant Field Values

DEFAULT

public static final String DEFAULT

See Also:

• Constant Field Values

Constructor Details

CommitOrderType

public CommitOrderType()