org.apache.storm.scheduler.resource.strategies.eviction

Class DefaultEvictionStrategy

java.lang.Object

org.apache.storm.scheduler.resource.strategies.eviction.DefaultEvictionStrategy

All Implemented Interfaces:

IEvictionStrategy

public class DefaultEvictionStrategy
extends Object
implements IEvictionStrategy

Constructor Summary

Constructors

Constructor and Description
DefaultEvictionStrategy()

Method Summary

Modifier and Type	Method and Description
boolean	makeSpaceForTopo(TopologyDetails td) This method when invoked should attempt to make space on the cluster so that the topology specified can be scheduled
void	prepare(SchedulingState schedulingState) Initialization

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultEvictionStrategy

public DefaultEvictionStrategy()

Method Detail

prepare

public void prepare(SchedulingState schedulingState)

Description copied from interface: IEvictionStrategy

Initialization

Specified by:

prepare in interface IEvictionStrategy

makeSpaceForTopo

public boolean makeSpaceForTopo(TopologyDetails td)

Description copied from interface: IEvictionStrategy

This method when invoked should attempt to make space on the cluster so that the topology specified can be scheduled

Specified by:

makeSpaceForTopo in interface IEvictionStrategy

Parameters:

td - the topology to make space for

Returns:

return true to indicate that space has been made for topology and try schedule topology td again. Return false to inidcate that no space could be made for the topology on the cluster and the scheduler should give up trying to schedule the topology for this round of scheduling. This method will be invoked until the topology indicated could be scheduled or the method returns false