Package org.apache.hadoop.yarn.server.resourcemanager.placement

Class PlacementFactory

java.lang.Object

org.apache.hadoop.yarn.server.resourcemanager.placement.PlacementFactory

@Private
@Unstable
public final class PlacementFactory
extends Object

Factory class for creating instances of PlacementRule.

Method Summary

Modifier and Type	Method	Description
static PlacementRule	getPlacementRule(Class<? extends PlacementRule> ruleClass, Object initArg)	Create a new PlacementRule based on the rule class from the configuration.
static PlacementRule	getPlacementRule(String ruleStr, org.apache.hadoop.conf.Configuration conf)	Create a new PlacementRule based on the rule class from the configuration.

Methods inherited from class java.lang.Object

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

Method Details

getPlacementRule

public static PlacementRule getPlacementRule(String ruleStr,
 org.apache.hadoop.conf.Configuration conf)
                                      throws ClassNotFoundException

Create a new PlacementRule based on the rule class from the configuration. This is used to instantiate rules by the scheduler which does not resolve the class before this call.

Parameters:

ruleStr - The name of the class to instantiate

conf - The configuration object to set for the rule

Returns:

Created class instance

Throws:

ClassNotFoundException - no definition for the class with the specified name could be found.

getPlacementRule

public static PlacementRule getPlacementRule(Class<? extends PlacementRule> ruleClass,
 Object initArg)

Create a new PlacementRule based on the rule class from the configuration. This is used to instantiate rules by the scheduler which resolve the class before this call.

Parameters:

ruleClass - The specific class reference to instantiate

initArg - The config to set

Returns:

Created class instance