org.apache.hadoop.yarn.api.records
Class ApplicationId

java.lang.Object
  extended by org.apache.hadoop.yarn.api.records.ApplicationId
All Implemented Interfaces:
Comparable<ApplicationId>

@InterfaceAudience.Public
@InterfaceStability.Stable
public abstract class ApplicationId
extends Object
implements Comparable<ApplicationId>

ApplicationId represents the globally unique identifier for an application.

The globally unique nature of the identifier is achieved by using the cluster timestamp i.e. start-time of the ResourceManager along with a monotonically increasing counter for the application.


Constructor Summary
ApplicationId()
           
 
Method Summary
 int compareTo(ApplicationId other)
           
 boolean equals(Object obj)
           
abstract  long getClusterTimestamp()
          Get the start time of the ResourceManager which is used to generate globally unique ApplicationId.
abstract  int getId()
          Get the short integer identifier of the ApplicationId which is unique for all applications started by a particular instance of the ResourceManager.
 int hashCode()
           
 String toString()
           
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
 

Constructor Detail

ApplicationId

public ApplicationId()
Method Detail

getId

@InterfaceAudience.Public
@InterfaceStability.Stable
public abstract int getId()
Get the short integer identifier of the ApplicationId which is unique for all applications started by a particular instance of the ResourceManager.

Returns:
short integer identifier of the ApplicationId

getClusterTimestamp

public abstract long getClusterTimestamp()
Get the start time of the ResourceManager which is used to generate globally unique ApplicationId.

Returns:
start time of the ResourceManager

compareTo

public int compareTo(ApplicationId other)
Specified by:
compareTo in interface Comparable<ApplicationId>

toString

public String toString()
Overrides:
toString in class Object

hashCode

public int hashCode()
Overrides:
hashCode in class Object

equals

public boolean equals(Object obj)
Overrides:
equals in class Object


Copyright © 2012 Apache Software Foundation. All Rights Reserved.