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, 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>

Field Summary

protected AtomicBoolean

fallbackToSimpleAuth

Constructor Summary

AbstractNNFailoverProxyProvider()

Method Summary

void	setFallbackToSimpleAuth(AtomicBoolean fallbackToSimpleAuth) Set for tracking if a secure client falls back to simple auth.
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

Field Detail

fallbackToSimpleAuth

protected AtomicBoolean fallbackToSimpleAuth

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.

setFallbackToSimpleAuth

public void setFallbackToSimpleAuth(AtomicBoolean fallbackToSimpleAuth)

Set for tracking if a secure client falls back to simple auth. This method is synchronized only to stifle a Findbugs warning.

Parameters:

fallbackToSimpleAuth - - set to true or false during this method to indicate if a secure client falls back to simple auth