alluxio.client.lineage

Enum LineageContext

java.lang.Object

java.lang.Enum<LineageContext>

alluxio.client.lineage.LineageContext

All Implemented Interfaces:

Serializable, Comparable<LineageContext>

@ThreadSafe
public enum LineageContext
extends Enum<LineageContext>

A shared context in each client JVM for common lineage master client functionality such as a pool of lineage master clients. Any remote clients will be created and destroyed on a per use basis.

Enum Constant Summary

Enum Constants

Enum Constant and Description
INSTANCE

Method Summary

Modifier and Type	Method and Description
LineageMasterClient	acquireMasterClient() Acquires a lineage master client from the lineage master client pool.
void	releaseMasterClient(LineageMasterClient masterClient) Releases a lineage master client into the lineage master client pool.
void	reset() Re-initializes the LineageContext.
static LineageContext	valueOf(String name) Returns the enum constant of this type with the specified name.
static LineageContext[]	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

INSTANCE

public static final LineageContext INSTANCE

Method Detail

values

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

Returns:

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

valueOf

public static LineageContext 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

acquireMasterClient

public LineageMasterClient acquireMasterClient()

Acquires a lineage master client from the lineage master client pool.

Returns:

the acquired lineage master client

releaseMasterClient

public void releaseMasterClient(LineageMasterClient masterClient)

Releases a lineage master client into the lineage master client pool.

Parameters:

masterClient - a lineage master client to release

reset

public void reset()

Re-initializes the LineageContext.