Package org.apache.flink.runtime.scheduler

Class DefaultVertexParallelismInfo

java.lang.Object

org.apache.flink.runtime.scheduler.DefaultVertexParallelismInfo

All Implemented Interfaces:

VertexParallelismInformation

public class DefaultVertexParallelismInfo
extends Object
implements VertexParallelismInformation

A VertexParallelismInformation implementation that provides common validation.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	PARALLELISM_AUTO_MAX	The constant to use for the parallelism, if the system should use the number of currently available slots.

Constructor Summary

Constructors

Constructor	Description
DefaultVertexParallelismInfo(int minParallelism, int parallelism, int maxParallelism, Function<Integer,Optional<String>> rescaleMaxValidator)
DefaultVertexParallelismInfo(int parallelism, int maxParallelism, Function<Integer,Optional<String>> rescaleMaxValidator)	Create VertexParallelismInformation with max parallelism rescaling validation for a vertex.

Method Summary

Modifier and Type	Method	Description
boolean	canRescaleMaxParallelism(int desiredMaxParallelism)	Returns whether the vertex's max parallelism can be changed to a given value.
int	getMaxParallelism()	Returns the vertex's max parallelism.
int	getMinParallelism()	Returns a vertex's min parallelism.
int	getParallelism()	Returns a vertex's parallelism.
void	setMaxParallelism(int maxParallelism)	Changes a given vertex's max parallelism property.
void	setParallelism(int parallelism)	Set a given vertex's parallelism property.

Methods inherited from class java.lang.Object

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

Field Details

PARALLELISM_AUTO_MAX

public static final int PARALLELISM_AUTO_MAX

The constant to use for the parallelism, if the system should use the number of currently available slots.

See Also:

• Constant Field Values

Constructor Details

DefaultVertexParallelismInfo

public DefaultVertexParallelismInfo(int parallelism,
 int maxParallelism,
 Function<Integer,Optional<String>> rescaleMaxValidator)

Create VertexParallelismInformation with max parallelism rescaling validation for a vertex.

Parameters:

parallelism - the vertex's parallelism

maxParallelism - the vertex's max parallelism

rescaleMaxValidator - the validation function to provide an error message if a max parallelism rescale is not allowed

DefaultVertexParallelismInfo

public DefaultVertexParallelismInfo(int minParallelism,
 int parallelism,
 int maxParallelism,
 Function<Integer,Optional<String>> rescaleMaxValidator)

Method Details

getMinParallelism

public int getMinParallelism()

Description copied from interface: VertexParallelismInformation

Returns a vertex's min parallelism.

Specified by:

getMinParallelism in interface VertexParallelismInformation

Returns:

the min parallelism for the vertex

getParallelism

public int getParallelism()

Description copied from interface: VertexParallelismInformation

Returns a vertex's parallelism.

Specified by:

getParallelism in interface VertexParallelismInformation

Returns:

the parallelism for the vertex

getMaxParallelism

public int getMaxParallelism()

Description copied from interface: VertexParallelismInformation

Returns the vertex's max parallelism.

Specified by:

getMaxParallelism in interface VertexParallelismInformation

Returns:

the max parallelism for the vertex

setParallelism

public void setParallelism(int parallelism)

Description copied from interface: VertexParallelismInformation

Set a given vertex's parallelism property. The parallelism can be changed only if the vertex parallelism was not decided yet (i.e. was -1).

Specified by:

setParallelism in interface VertexParallelismInformation

Parameters:

parallelism - the parallelism for the vertex

setMaxParallelism

public void setMaxParallelism(int maxParallelism)

Description copied from interface: VertexParallelismInformation

Changes a given vertex's max parallelism property. The caller should first check the validity of the new setting via VertexParallelismInformation.canRescaleMaxParallelism(int), otherwise this operation may fail.

Specified by:

setMaxParallelism in interface VertexParallelismInformation

Parameters:

maxParallelism - the new max parallelism for the vertex

canRescaleMaxParallelism

public boolean canRescaleMaxParallelism(int desiredMaxParallelism)

Description copied from interface: VertexParallelismInformation

Returns whether the vertex's max parallelism can be changed to a given value.

Specified by:

canRescaleMaxParallelism in interface VertexParallelismInformation

Parameters:

desiredMaxParallelism - the desired max parallelism for the vertex

Returns:

whether the max parallelism can be changed to the given value