Enum Class ConsistencyGuarantee

java.lang.Object

java.lang.Enum<ConsistencyGuarantee>

com.kingsrook.qqq.backend.core.model.actions.consistentread.ConsistencyGuarantee

All Implemented Interfaces:

Serializable, Comparable<ConsistencyGuarantee>, Constable

public enum ConsistencyGuarantee
extends Enum<ConsistencyGuarantee>

What a consistent-read transaction actually guarantees - to be recorded by callers (e.g., in a backup manifest) rather than assumed.

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
BEST_EFFORT	No snapshot guarantee (e.g., MyISAM tables, or a backend with no snapshot support) - reads see whatever is committed when they run.
ONE_INSTANT	Every table read through the transaction reflects one single instant.
PER_TABLE	Each table is internally consistent, but different tables may reflect different instants.

Method Summary

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

ONE_INSTANT

public static final ConsistencyGuarantee ONE_INSTANT

Every table read through the transaction reflects one single instant.

PER_TABLE

public static final ConsistencyGuarantee PER_TABLE

Each table is internally consistent, but different tables may reflect different instants.

BEST_EFFORT

public static final ConsistencyGuarantee BEST_EFFORT

No snapshot guarantee (e.g., MyISAM tables, or a backend with no snapshot support) - reads see whatever is committed when they run.

Method Details

values

public static ConsistencyGuarantee[] 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 ConsistencyGuarantee 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