com.liferay.portal.kernel.transaction

Enum Isolation

Object

Enum<Isolation>

com.liferay.portal.kernel.transaction.Isolation

All Implemented Interfaces:

Serializable, Comparable<Isolation>

public enum Isolation
extends Enum<Isolation>

Defines the level of visibility this transaction has for data changes made by other concurrent transactions.

SERIALIZABLE is the most restrictive.

READ_UNCOMMITTED is the least restrictive.

Author:

Michael Young, Shuyang Zhou

See Also:

Transactional

Enum Constant Summary

Enum Constants

Enum Constant and Description
COUNTER Use the isolation level of the counter service, as defined by the portal properties.
DEFAULT Use the default isolation level of the underlying data store.
PORTAL Use the isolation level of the portal, as defined by the portal properties.
READ_COMMITTED Prevent dirty reads; allow non-repeatable reads and phantom reads.
READ_UNCOMMITTED Allow dirty reads, non-repeatable reads, and phantom reads.
REPEATABLE_READ Prevent dirty reads and non-repeatable reads; allow phantom reads.
SERIALIZABLE Prevent dirty reads, non-repeatable reads, and phantom reads.

Method Summary

Modifier and Type	Method and Description
static Isolation	getIsolation(int value)
int	value()
static Isolation	valueOf(String name) Returns the enum constant of this type with the specified name.
static Isolation[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

COUNTER

public static final Isolation COUNTER

Use the isolation level of the counter service, as defined by the portal properties.

DEFAULT

public static final Isolation DEFAULT

Use the default isolation level of the underlying data store.

PORTAL

public static final Isolation PORTAL

Use the isolation level of the portal, as defined by the portal properties.

READ_COMMITTED

public static final Isolation READ_COMMITTED

Prevent dirty reads; allow non-repeatable reads and phantom reads.

READ_UNCOMMITTED

public static final Isolation READ_UNCOMMITTED

Allow dirty reads, non-repeatable reads, and phantom reads.

REPEATABLE_READ

public static final Isolation REPEATABLE_READ

Prevent dirty reads and non-repeatable reads; allow phantom reads.

SERIALIZABLE

public static final Isolation SERIALIZABLE

Prevent dirty reads, non-repeatable reads, and phantom reads.

Method Detail

values

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

Returns:

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

valueOf

public static Isolation 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

getIsolation

public static Isolation getIsolation(int value)

value

public int value()