org.apache.tez.dag.api

Enum EdgeProperty.DataMovementType

java.lang.Object

java.lang.Enum<EdgeProperty.DataMovementType>

org.apache.tez.dag.api.EdgeProperty.DataMovementType

All Implemented Interfaces:

Serializable, Comparable<EdgeProperty.DataMovementType>

Enclosing class:

EdgeProperty

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

Defines the manner of data movement between source and destination tasks. Determines which destination tasks have access to data produced on this edge by a source task. A destination task may choose to read any portion of the data available to it.

Enum Constant Summary

Enum Constants

Enum Constant and Description
BROADCAST Output on this edge produced by any source task is available to all destination tasks.
CUSTOM Custom routing defined by the user.
ONE_TO_ONE Output on this edge produced by the i-th source task is available to the i-th destination task.
SCATTER_GATHER The i-th output on this edge produced by all source tasks is available to the same destination task.

Method Summary

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

ONE_TO_ONE

public static final EdgeProperty.DataMovementType ONE_TO_ONE

Output on this edge produced by the i-th source task is available to the i-th destination task.

BROADCAST

public static final EdgeProperty.DataMovementType BROADCAST

Output on this edge produced by any source task is available to all destination tasks.

SCATTER_GATHER

public static final EdgeProperty.DataMovementType SCATTER_GATHER

The i-th output on this edge produced by all source tasks is available to the same destination task. Source tasks scatter their outputs and they are gathered by designated destination tasks.

CUSTOM

public static final EdgeProperty.DataMovementType CUSTOM

Custom routing defined by the user.

Method Detail

values

public static EdgeProperty.DataMovementType[] 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.DataMovementType c : EdgeProperty.DataMovementType.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.DataMovementType 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