Enum Class QueryLockMode

java.lang.Object

java.lang.Enum<QueryLockMode>

com.kingsrook.qqq.backend.core.model.actions.tables.query.QueryLockMode

All Implemented Interfaces:

Serializable, Comparable<QueryLockMode>, Constable

public enum QueryLockMode
extends Enum<QueryLockMode>

Row locks a query may take, on backends that support them (see QBackendModuleInterface.supportsQueryLockMode). Run such a query inside a transaction; the locks are held until it ends.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
FOR_UPDATE_SKIP_LOCKED	Lock the selected rows for update, skipping rows another transaction has locked (SQL: FOR UPDATE SKIP LOCKED).

Method Summary

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

Methods inherited from class java.lang.Enum

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

FOR_UPDATE_SKIP_LOCKED

public static final QueryLockMode FOR_UPDATE_SKIP_LOCKED

Lock the selected rows for update, skipping rows another transaction has locked (SQL: FOR UPDATE SKIP LOCKED). For work queues: competing workers each get different rows instead of waiting on or racing for the same ones.

Method Details

values

public static QueryLockMode[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

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

valueOf

public static QueryLockMode valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (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 class has no constant with the specified name

NullPointerException - if the argument is null