org.apache.hadoop.hdfs.server.namenode.ha

Class AbstractNNFailoverProxyProvider<T>

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.ha.AbstractNNFailoverProxyProvider<T>

All Implemented Interfaces:

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

Direct Known Subclasses:

ConfiguredFailoverProxyProvider, IPFailoverProxyProvider, WrappedFailoverProxyProvider

public abstract class AbstractNNFailoverProxyProvider<T>
extends Object
implements org.apache.hadoop.io.retry.FailoverProxyProvider<T>

Nested Class Summary

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

org.apache.hadoop.io.retry.FailoverProxyProvider.ProxyInfo<T>

Constructor Summary

Constructors

Constructor and Description
AbstractNNFailoverProxyProvider()

Method Summary

Methods

Modifier and Type	Method and Description
abstract boolean	useLogicalURI() Inquire whether logical HA URI is used for the implementation.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.hadoop.io.retry.FailoverProxyProvider

getInterface, getProxy, performFailover

Methods inherited from interface java.io.Closeable

close

Constructor Detail

AbstractNNFailoverProxyProvider

public AbstractNNFailoverProxyProvider()

Method Detail

useLogicalURI

public abstract boolean useLogicalURI()

Inquire whether logical HA URI is used for the implementation. If it is used, a special token handling may be needed to make sure a token acquired from a node in the HA pair can be used against the other node.

Returns:

true if logical HA URI is used. false, if not used.