org.apache.slider.server.appmaster.state

Class ContainerPriority

java.lang.Object

org.apache.slider.server.appmaster.state.ContainerPriority

public final class ContainerPriority
extends Object

Class containing the logic to build/split container priorities into the different fields used by Slider The original design here had a requestID merged with the role, to track outstanding requests. However, this isn't possible, so the request ID has been dropped. A "location specified" flag was added to indicate whether or not the request was for a specific location -though this is currently unused. The methods are effectively surplus -but retained to preserve the option of changing behavior in future

Constructor Summary

Constructors

Constructor and Description
ContainerPriority()

Method Summary

Methods

Modifier and Type	Method and Description
static int	buildPriority(int role, boolean locationSpecified)
static org.apache.hadoop.yarn.api.records.Priority	createPriority(int role, boolean locationSpecified)
static int	extractRole(org.apache.hadoop.yarn.api.records.Container container) Map from a container to a role key by way of its priority
static int	extractRole(int priority)
static int	extractRole(org.apache.hadoop.yarn.api.records.Priority priorityRecord) Priority record to role mapper
static boolean	hasLocation(int priority) Does the priority have location
static String	toString(org.apache.hadoop.yarn.api.records.Priority priorityRecord) Convert a priority record to a string, extracting role and locality

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ContainerPriority

public ContainerPriority()

Method Detail

buildPriority

public static int buildPriority(int role,
                boolean locationSpecified)

createPriority

public static org.apache.hadoop.yarn.api.records.Priority createPriority(int role,
                                                         boolean locationSpecified)

extractRole

public static int extractRole(int priority)

hasLocation

public static boolean hasLocation(int priority)

Does the priority have location

Parameters:

priority - priority index

Returns:

true if the priority has the location marker

extractRole

public static int extractRole(org.apache.hadoop.yarn.api.records.Container container)

Map from a container to a role key by way of its priority

Parameters:

container - container

Returns:

role key

extractRole

public static int extractRole(org.apache.hadoop.yarn.api.records.Priority priorityRecord)

Priority record to role mapper

Parameters:

priorityRecord - priority record

Returns:

the role #

toString

public static String toString(org.apache.hadoop.yarn.api.records.Priority priorityRecord)

Convert a priority record to a string, extracting role and locality

Parameters:

priorityRecord - priority record. May be null

Returns:

a string value