io.ray.streaming.state.backend

Enum StateStrategy

java.lang.Object

java.lang.Enum<StateStrategy>

io.ray.streaming.state.backend.StateStrategy

All Implemented Interfaces:

Serializable, Comparable<StateStrategy>

public enum StateStrategy
extends Enum<StateStrategy>

This class describe State Saving Model.

Enum Constant Summary

Enum Constants

Enum Constant and Description
DUAL_VERSION save two version together in case of rollback.
SINGLE_VERSION for storage supporting mvcc, we save only current version.

Method Summary

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

DUAL_VERSION

public static final StateStrategy DUAL_VERSION

save two version together in case of rollback.

SINGLE_VERSION

public static final StateStrategy SINGLE_VERSION

for storage supporting mvcc, we save only current version.

Method Detail

values

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

Returns:

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

valueOf

public static StateStrategy 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

getEnum

public static StateStrategy getEnum(String value)