org.apache.hadoop.yarn.server.resourcemanager
Class NodesListManager

java.lang.Object
  org.apache.hadoop.service.AbstractService
      org.apache.hadoop.yarn.server.resourcemanager.NodesListManager

All Implemented Interfaces:

Closeable, org.apache.hadoop.service.Service, org.apache.hadoop.yarn.event.EventHandler<NodesListManagerEvent>

public class NodesListManager
extends org.apache.hadoop.service.AbstractService
implements org.apache.hadoop.yarn.event.EventHandler<NodesListManagerEvent>

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.service.Service

org.apache.hadoop.service.Service.STATE

Constructor Summary

NodesListManager(RMContext rmContext)

Method Summary

org.apache.hadoop.util.HostsFileReader	getHostsReader()
int	getUnusableNodes(Collection<RMNode> unUsableNodes) Provides the currently unusable nodes.
void	handle(NodesListManagerEvent event)
boolean	isValidNode(String hostName)
void	refreshNodes(org.apache.hadoop.conf.Configuration yarnConf)
protected void	serviceInit(org.apache.hadoop.conf.Configuration conf)

Methods inherited from class org.apache.hadoop.service.AbstractService

close, getBlockers, getConfig, getFailureCause, getFailureState, getLifecycleHistory, getName, getServiceState, getStartTime, init, isInState, noteFailure, putBlocker, registerGlobalListener, registerServiceListener, removeBlocker, serviceStart, serviceStop, setConfig, start, stop, toString, unregisterGlobalListener, unregisterServiceListener, waitForServiceToStop

Methods inherited from class java.lang.Object

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

Constructor Detail

NodesListManager

public NodesListManager(RMContext rmContext)

Method Detail

serviceInit

protected void serviceInit(org.apache.hadoop.conf.Configuration conf)
                    throws Exception

Overrides:

serviceInit in class org.apache.hadoop.service.AbstractService

Throws:

Exception

refreshNodes

public void refreshNodes(org.apache.hadoop.conf.Configuration yarnConf)
                  throws IOException,
                         org.apache.hadoop.yarn.exceptions.YarnException

Throws:

IOException

org.apache.hadoop.yarn.exceptions.YarnException

isValidNode

public boolean isValidNode(String hostName)

getUnusableNodes

public int getUnusableNodes(Collection<RMNode> unUsableNodes)

Provides the currently unusable nodes. Copies it into provided collection.

Parameters:

unUsableNodes - Collection to which the unusable nodes are added

Returns:

number of unusable nodes added

handle

public void handle(NodesListManagerEvent event)

Specified by:

handle in interface org.apache.hadoop.yarn.event.EventHandler<NodesListManagerEvent>

getHostsReader

public org.apache.hadoop.util.HostsFileReader getHostsReader()