Package org.apache.hadoop.yarn.api.records

Class ReservationRequest

java.lang.Object

org.apache.hadoop.yarn.api.records.ReservationRequest

All Implemented Interfaces:

Comparable<ReservationRequest>

@Public
@Unstable
public abstract class ReservationRequest
extends Object
implements Comparable<ReservationRequest>

ReservationRequest represents the request made by an application to the ResourceManager to reserve Resources.

It includes:

• Resource required for each request.
• Number of containers, of above specifications, which are required by the application.
• Concurrency that indicates the gang size of the request.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ReservationRequest.ReservationRequestComparator

Constructor Summary

Constructors

Constructor	Description
ReservationRequest()

Method Summary

Modifier and Type	Method	Description
int	compareTo(ReservationRequest other)
boolean	equals(Object obj)
abstract Resource	getCapability()	Get the Resource capability of the request.
abstract int	getConcurrency()	Get the number of containers that need to be scheduled concurrently.
abstract long	getDuration()	Get the duration in milliseconds for which the resource is required.
abstract int	getNumContainers()	Get the number of containers required with the given specifications.
int	hashCode()
static ReservationRequest	newInstance(Resource capability, int numContainers)
static ReservationRequest	newInstance(Resource capability, int numContainers, int concurrency, long duration)
abstract void	setCapability(Resource capability)	Set the Resource capability of the request
abstract void	setConcurrency(int numContainers)	Set the number of containers that need to be scheduled concurrently.
abstract void	setDuration(long duration)	Set the duration in milliseconds for which the resource is required.
abstract void	setNumContainers(int numContainers)	Set the number of containers required with the given specifications

Methods inherited from class java.lang.Object

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

Constructor Details

ReservationRequest

public ReservationRequest()

Method Details

newInstance

@Public
@Unstable
public static ReservationRequest newInstance(Resource capability,
 int numContainers)

newInstance

@Public
@Unstable
public static ReservationRequest newInstance(Resource capability,
 int numContainers,
 int concurrency,
 long duration)

getCapability

@Public
@Unstable
public abstract Resource getCapability()

Get the Resource capability of the request.

Returns:

Resource capability of the request

setCapability

@Public
@Unstable
public abstract void setCapability(Resource capability)

Set the Resource capability of the request

Parameters:

capability - Resource capability of the request

getNumContainers

@Public
@Unstable
public abstract int getNumContainers()

Get the number of containers required with the given specifications.

Returns:

number of containers required with the given specifications

setNumContainers

@Public
@Unstable
public abstract void setNumContainers(int numContainers)

Set the number of containers required with the given specifications

Parameters:

numContainers - number of containers required with the given specifications

getConcurrency

@Public
@Unstable
public abstract int getConcurrency()

Get the number of containers that need to be scheduled concurrently. The default value of 1 would fall back to the current non concurrency constraints on the scheduling behavior.

Returns:

the number of containers to be concurrently scheduled

setConcurrency

@Public
@Unstable
public abstract void setConcurrency(int numContainers)

Set the number of containers that need to be scheduled concurrently. The default value of 1 would fall back to the current non concurrency constraints on the scheduling behavior.

Parameters:

numContainers - the number of containers to be concurrently scheduled

getDuration

@Public
@Unstable
public abstract long getDuration()

Get the duration in milliseconds for which the resource is required. A default value of -1, indicates an unspecified lease duration, and fallback to current behavior.

Returns:

the duration in milliseconds for which the resource is required

setDuration

@Public
@Unstable
public abstract void setDuration(long duration)

Set the duration in milliseconds for which the resource is required.

Parameters:

duration - the duration in milliseconds for which the resource is required

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

compareTo

public int compareTo(ReservationRequest other)

Specified by:

compareTo in interface Comparable<ReservationRequest>