Package org.eclipse.persistence.sessions

Enum UnitOfWork.CommitOrderType

java.lang.Object

java.lang.Enum<UnitOfWork.CommitOrderType>

org.eclipse.persistence.sessions.UnitOfWork.CommitOrderType

All Implemented Interfaces:

Serializable, Comparable<UnitOfWork.CommitOrderType>

Enclosing interface:

UnitOfWork

public static enum UnitOfWork.CommitOrderType
extends Enum<UnitOfWork.CommitOrderType>

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 ordered by primary key.

Enum Constant Summary

Enum Constants

Enum Constant	Description
CHANGES	Updates are ordered by the object's changes, then by id.
ID	Updates and deletes are ordered by the object's id.
NONE	No ordering is done.

Method Summary

Modifier and Type	Method	Description
static UnitOfWork.CommitOrderType	valueOf(String name)	Returns the enum constant of this type with the specified name.
static UnitOfWork.CommitOrderType[]	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

ID

public static final UnitOfWork.CommitOrderType ID

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

CHANGES

public static final UnitOfWork.CommitOrderType CHANGES

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

NONE

public static final UnitOfWork.CommitOrderType NONE

No ordering is done.

Method Detail

values

public static UnitOfWork.CommitOrderType[] 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 (UnitOfWork.CommitOrderType c : UnitOfWork.CommitOrderType.values())
    System.out.println(c);

Returns:

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

valueOf

public static UnitOfWork.CommitOrderType valueOf(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:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null