Package org.apache.hadoop.yarn.client

Class DefaultNoHARMFailoverProxyProvider<T>

java.lang.Object

org.apache.hadoop.yarn.client.DefaultNoHARMFailoverProxyProvider<T>

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, org.apache.hadoop.io.retry.FailoverProxyProvider<T>, RMFailoverProxyProvider<T>

Direct Known Subclasses:

AutoRefreshNoHARMFailoverProxyProvider

@Private
@Unstable
public class DefaultNoHARMFailoverProxyProvider<T>
extends java.lang.Object
implements RMFailoverProxyProvider<T>

An implementation of RMFailoverProxyProvider which does nothing in the event of failover, and always returns the same proxy object. This is the default non-HA RM Failover proxy provider. It is used to replace DefaultFailoverProxyProvider which was used as Yarn default non-HA.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.io.retry.FailoverProxyProvider

org.apache.hadoop.io.retry.FailoverProxyProvider.ProxyInfo<T extends java.lang.Object>

Field Summary

Fields

Modifier and Type	Field	Description
protected java.lang.Class<T>	protocol
protected T	proxy

Constructor Summary

Constructors

Constructor	Description
DefaultNoHARMFailoverProxyProvider()

Method Summary

Modifier and Type	Method	Description
void	close()	Close the current proxy.
java.lang.Class<T>	getInterface()
org.apache.hadoop.io.retry.FailoverProxyProvider.ProxyInfo<T>	getProxy()
void	init(org.apache.hadoop.conf.Configuration conf, RMProxy<T> proxy, java.lang.Class<T> protocol)	Initialize internal data structures, invoked right after instantiation.
void	performFailover(T currentProxy)	PerformFailover does nothing in this class.

Methods inherited from class java.lang.Object

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

Field Detail

proxy

protected T proxy

protocol

protected java.lang.Class<T> protocol

Constructor Detail

DefaultNoHARMFailoverProxyProvider

public DefaultNoHARMFailoverProxyProvider()

Method Detail

init

public void init(org.apache.hadoop.conf.Configuration conf,
                 RMProxy<T> proxy,
                 java.lang.Class<T> protocol)

Initialize internal data structures, invoked right after instantiation.

Specified by:

init in interface RMFailoverProxyProvider<T>

Parameters:

conf - Configuration to use

proxy - The RMProxy instance to use

protocol - The communication protocol to use

getInterface

public java.lang.Class<T> getInterface()

Specified by:

getInterface in interface org.apache.hadoop.io.retry.FailoverProxyProvider<T>

getProxy

public org.apache.hadoop.io.retry.FailoverProxyProvider.ProxyInfo<T> getProxy()

Specified by:

getProxy in interface org.apache.hadoop.io.retry.FailoverProxyProvider<T>

performFailover

public void performFailover(T currentProxy)

PerformFailover does nothing in this class.

Specified by:

performFailover in interface org.apache.hadoop.io.retry.FailoverProxyProvider<T>

Parameters:

currentProxy - currentProxy.

close

public void close()
           throws java.io.IOException

Close the current proxy.

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.io.Closeable

Throws:

java.io.IOException - io error occur.