org.apache.hadoop.yarn.server.resourcemanager.scheduler
Class ActiveUsersManager

java.lang.Object
  org.apache.hadoop.yarn.server.resourcemanager.scheduler.ActiveUsersManager

@InterfaceAudience.Private
public class ActiveUsersManager
extends Object

ActiveUsersManager tracks active users in the system. A user is deemed to be active if he has any running applications with outstanding resource requests. An active user is defined as someone with outstanding resource requests.

Constructor Summary

ActiveUsersManager(QueueMetrics metrics)

Method Summary

void	activateApplication(String user, org.apache.hadoop.yarn.api.records.ApplicationId applicationId) An application has new outstanding requests.
void	deactivateApplication(String user, org.apache.hadoop.yarn.api.records.ApplicationId applicationId) An application has no more outstanding requests.
int	getNumActiveUsers() Get number of active users i.e.

Methods inherited from class java.lang.Object

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

Constructor Detail

ActiveUsersManager

public ActiveUsersManager(QueueMetrics metrics)

Method Detail

activateApplication

@Lock(value={Queue.class,SchedulerApplicationAttempt.class})
public void activateApplication(String user,
                                                                                 org.apache.hadoop.yarn.api.records.ApplicationId applicationId)

An application has new outstanding requests.

Parameters:

user - application user

applicationId - activated application

deactivateApplication

@Lock(value={Queue.class,SchedulerApplicationAttempt.class})
public void deactivateApplication(String user,
                                                                                   org.apache.hadoop.yarn.api.records.ApplicationId applicationId)

An application has no more outstanding requests.

Parameters:

user - application user

applicationId - deactivated application

getNumActiveUsers

@Lock(value={Queue.class,SchedulerApplicationAttempt.class})
public int getNumActiveUsers()

Get number of active users i.e. users with applications which have pending resource requests.

Returns:

number of active users