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<div class="subTitle">org.apache.hadoop.hdfs.server.namenode.ha</div>
<h2 title="Class AbstractNNFailoverProxyProvider" class="title">Class AbstractNNFailoverProxyProvider&lt;T&gt;</h2>
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<li>org.apache.hadoop.hdfs.server.namenode.ha.AbstractNNFailoverProxyProvider&lt;T&gt;</li>
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<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a>, org.apache.hadoop.io.retry.FailoverProxyProvider&lt;T&gt;</dd>
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<dd><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/ConfiguredFailoverProxyProvider.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">ConfiguredFailoverProxyProvider</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/IPFailoverProxyProvider.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">IPFailoverProxyProvider</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/WrappedFailoverProxyProvider.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">WrappedFailoverProxyProvider</a></dd>
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<pre>public abstract class <span class="typeNameLabel">AbstractNNFailoverProxyProvider&lt;T&gt;</span>
extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>
implements org.apache.hadoop.io.retry.FailoverProxyProvider&lt;T&gt;</pre>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Class and Description</th>
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<td class="colFirst"><code>static class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.NNProxyInfo.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">AbstractNNFailoverProxyProvider.NNProxyInfo</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.NNProxyInfo.html" title="type parameter in AbstractNNFailoverProxyProvider.NNProxyInfo">T</a>&gt;</span></code>
<div class="block">ProxyInfo to a NameNode.</div>
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<h3>Nested classes/interfaces inherited from interface&nbsp;org.apache.hadoop.io.retry.FailoverProxyProvider</h3>
<code>org.apache.hadoop.io.retry.FailoverProxyProvider.ProxyInfo&lt;T&gt;</code></li>
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<td class="colFirst"><code>protected org.apache.hadoop.conf.Configuration</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#conf">conf</a></span></code>&nbsp;</td>
</tr>
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<td class="colFirst"><code>protected org.apache.hadoop.hdfs.server.namenode.ha.HAProxyFactory&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#factory">factory</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicBoolean.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicBoolean</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#fallbackToSimpleAuth">fallbackToSimpleAuth</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected static org.slf4j.Logger</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#LOG">LOG</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>protected org.apache.hadoop.security.UserGroupInformation</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#ugi">ugi</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#xface">xface</a></span></code>&nbsp;</td>
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<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#AbstractNNFailoverProxyProvider--">AbstractNNFailoverProxyProvider</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#AbstractNNFailoverProxyProvider-org.apache.hadoop.conf.Configuration-java.net.URI-java.lang.Class-org.apache.hadoop.hdfs.server.namenode.ha.HAProxyFactory-">AbstractNNFailoverProxyProvider</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="https://docs.oracle.com/javase/8/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</a>&nbsp;uri,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt;&nbsp;xface,
org.apache.hadoop.hdfs.server.namenode.ha.HAProxyFactory&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt;&nbsp;factory)</code>&nbsp;</td>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<td class="colFirst"><code>protected <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.NNProxyInfo.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">AbstractNNFailoverProxyProvider.NNProxyInfo</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#createProxyIfNeeded-org.apache.hadoop.hdfs.server.namenode.ha.AbstractNNFailoverProxyProvider.NNProxyInfo-">createProxyIfNeeded</a></span>(<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.NNProxyInfo.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">AbstractNNFailoverProxyProvider.NNProxyInfo</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt;&nbsp;pi)</code>
<div class="block">Create a proxy if it has not been created yet.</div>
</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicBoolean.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicBoolean</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#getFallbackToSimpleAuth--">getFallbackToSimpleAuth</a></span>()</code>&nbsp;</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#getInterface--">getInterface</a></span>()</code>&nbsp;</td>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.NNProxyInfo.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">AbstractNNFailoverProxyProvider.NNProxyInfo</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#getProxyAddresses-java.net.URI-java.lang.String-">getProxyAddresses</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</a>&nbsp;uri,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;addressKey)</code>
<div class="block">Get list of configured NameNode proxy addresses.</div>
</td>
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<tr id="i4" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#getRandomOrder-org.apache.hadoop.conf.Configuration-java.net.URI-">getRandomOrder</a></span>(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="https://docs.oracle.com/javase/8/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</a>&nbsp;nameNodeUri)</code>
<div class="block">Check whether random order is configured for failover proxy provider
for the namenode/nameservice.</div>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#setFallbackToSimpleAuth-java.util.concurrent.atomic.AtomicBoolean-">setFallbackToSimpleAuth</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicBoolean.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicBoolean</a>&nbsp;fallbackToSimpleAuth)</code>
<div class="block">Set for tracking if a secure client falls back to simple auth.</div>
</td>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>abstract boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html#useLogicalURI--">useLogicalURI</a></span>()</code>
<div class="block">Inquire whether logical HA URI is used for the implementation.</div>
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<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h3>Methods inherited from interface&nbsp;org.apache.hadoop.io.retry.FailoverProxyProvider</h3>
<code>getProxy, performFailover</code></li>
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<h3>Methods inherited from interface&nbsp;java.io.<a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true" title="class or interface in java.io">Closeable</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Closeable.html?is-external=true#close--" title="class or interface in java.io">close</a></code></li>
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<h4>LOG</h4>
<pre>protected static final&nbsp;org.slf4j.Logger LOG</pre>
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<h4>conf</h4>
<pre>protected&nbsp;org.apache.hadoop.conf.Configuration conf</pre>
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<pre>protected&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt; xface</pre>
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<h4>factory</h4>
<pre>protected&nbsp;org.apache.hadoop.hdfs.server.namenode.ha.HAProxyFactory&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt; factory</pre>
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<pre>protected&nbsp;org.apache.hadoop.security.UserGroupInformation ugi</pre>
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<pre>protected&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicBoolean.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicBoolean</a> fallbackToSimpleAuth</pre>
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<pre>protected&nbsp;AbstractNNFailoverProxyProvider()</pre>
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<pre>protected&nbsp;AbstractNNFailoverProxyProvider(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="https://docs.oracle.com/javase/8/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</a>&nbsp;uri,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt;&nbsp;xface,
org.apache.hadoop.hdfs.server.namenode.ha.HAProxyFactory&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt;&nbsp;factory)</pre>
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<pre>public abstract&nbsp;boolean&nbsp;useLogicalURI()</pre>
<div class="block">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.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if logical HA URI is used. false, if not used.</dd>
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<pre>public&nbsp;void&nbsp;setFallbackToSimpleAuth(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicBoolean.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicBoolean</a>&nbsp;fallbackToSimpleAuth)</pre>
<div class="block">Set for tracking if a secure client falls back to simple auth. This method
is synchronized only to stifle a Findbugs warning.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>fallbackToSimpleAuth</code> - - set to true or false during this method to
indicate if a secure client falls back to simple auth</dd>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicBoolean.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicBoolean</a>&nbsp;getFallbackToSimpleAuth()</pre>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt;&nbsp;getInterface()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>getInterface</code>&nbsp;in interface&nbsp;<code>org.apache.hadoop.io.retry.FailoverProxyProvider&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt;</code></dd>
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<pre>protected&nbsp;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.NNProxyInfo.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">AbstractNNFailoverProxyProvider.NNProxyInfo</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt;&nbsp;createProxyIfNeeded(<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.NNProxyInfo.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">AbstractNNFailoverProxyProvider.NNProxyInfo</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt;&nbsp;pi)</pre>
<div class="block">Create a proxy if it has not been created yet.</div>
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<pre>protected&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.NNProxyInfo.html" title="class in org.apache.hadoop.hdfs.server.namenode.ha">AbstractNNFailoverProxyProvider.NNProxyInfo</a>&lt;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/ha/AbstractNNFailoverProxyProvider.html" title="type parameter in AbstractNNFailoverProxyProvider">T</a>&gt;&gt;&nbsp;getProxyAddresses(<a href="https://docs.oracle.com/javase/8/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</a>&nbsp;uri,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;addressKey)</pre>
<div class="block">Get list of configured NameNode proxy addresses.
Randomize the list if requested.</div>
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<pre>public static&nbsp;boolean&nbsp;getRandomOrder(org.apache.hadoop.conf.Configuration&nbsp;conf,
<a href="https://docs.oracle.com/javase/8/docs/api/java/net/URI.html?is-external=true" title="class or interface in java.net">URI</a>&nbsp;nameNodeUri)</pre>
<div class="block">Check whether random order is configured for failover proxy provider
for the namenode/nameservice.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>conf</code> - Configuration</dd>
<dd><code>nameNodeUri</code> - The URI of namenode/nameservice</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>random order configuration</dd>
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