org.apache.tez.dag.api

Enum EdgeProperty.DataSourceType

java.lang.Object

java.lang.Enum<EdgeProperty.DataSourceType>

org.apache.tez.dag.api.EdgeProperty.DataSourceType

All Implemented Interfaces:

Serializable, Comparable<EdgeProperty.DataSourceType>

Enclosing class:

EdgeProperty

public static enum EdgeProperty.DataSourceType
extends Enum<EdgeProperty.DataSourceType>

Determines the lifetime of the data produced on this edge by a source task.

Enum Constant Summary

Enum Constants

Enum Constant and Description
EPHEMERAL Data produced by the source task is available only while the source task is running.
PERSISTED Data produced by the source is persisted and available even when the task is not running.
PERSISTED_RELIABLE Source data is stored reliably and will always be available.

Method Summary

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

PERSISTED

public static final EdgeProperty.DataSourceType PERSISTED

Data produced by the source is persisted and available even when the task is not running. The data may become unavailable and may cause the source task to be re-executed.

PERSISTED_RELIABLE

@InterfaceStability.Unstable
public static final EdgeProperty.DataSourceType PERSISTED_RELIABLE

Source data is stored reliably and will always be available. This is not supported yet.

EPHEMERAL

@InterfaceStability.Unstable
public static final EdgeProperty.DataSourceType EPHEMERAL

Data produced by the source task is available only while the source task is running. This requires the destination task to run concurrently with the source task. Development in progress.

Method Detail

values

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

Returns:

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

valueOf

public static EdgeProperty.DataSourceType 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