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<h2 title="Class CommandShell" class="title">Class CommandShell</h2>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../org/apache/hadoop/conf/Configurable.html" title="interface in org.apache.hadoop.conf">Configurable</a>, <a href="../../../../org/apache/hadoop/util/Tool.html" title="interface in org.apache.hadoop.util">Tool</a></dd>
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<dd><a href="../../../../org/apache/hadoop/security/alias/CredentialShell.html" title="class in org.apache.hadoop.security.alias">CredentialShell</a>, <a href="../../../../org/apache/hadoop/security/token/DtUtilShell.html" title="class in org.apache.hadoop.security.token">DtUtilShell</a>, <a href="../../../../org/apache/hadoop/crypto/key/KeyShell.html" title="class in org.apache.hadoop.crypto.key">KeyShell</a></dd>
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<pre>public abstract class <span class="typeNameLabel">CommandShell</span>
extends <a href="../../../../org/apache/hadoop/conf/Configured.html" title="class in org.apache.hadoop.conf">Configured</a>
implements <a href="../../../../org/apache/hadoop/util/Tool.html" title="interface in org.apache.hadoop.util">Tool</a></pre>
<div class="block">This program is a CLI utility base class utilizing hadoop Tool class.</div>
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<td class="colFirst"><code>protected class&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/tools/CommandShell.SubCommand.html" title="class in org.apache.hadoop.tools">CommandShell.SubCommand</a></span></code>
<div class="block">Base class for any subcommands of this shell command.</div>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/tools/CommandShell.html#CommandShell--">CommandShell</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>abstract <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></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/tools/CommandShell.html#getCommandUsage--">getCommandUsage</a></span>()</code>
<div class="block">Return usage string for the command including any summary of subcommands.</div>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/tools/CommandShell.html#getErr--">getErr</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/tools/CommandShell.html#getOut--">getOut</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>protected abstract int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/tools/CommandShell.html#init-java.lang.String:A-">init</a></span>(<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;args)</code>
<div class="block">Parse the command line arguments and initialize subcommand instance.</div>
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<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/tools/CommandShell.html#printException-java.lang.Exception-">printException</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a>&nbsp;ex)</code>&nbsp;</td>
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<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/tools/CommandShell.html#printShellUsage--">printShellUsage</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/tools/CommandShell.html#run-java.lang.String:A-">run</a></span>(<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;args)</code>
<div class="block">Execute the command with the given arguments.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/tools/CommandShell.html#setErr-java.io.PrintStream-">setErr</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a>&nbsp;p)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/tools/CommandShell.html#setOut-java.io.PrintStream-">setOut</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a>&nbsp;p)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/tools/CommandShell.html#setSubCommand-org.apache.hadoop.tools.CommandShell.SubCommand-">setSubCommand</a></span>(<a href="../../../../org/apache/hadoop/tools/CommandShell.SubCommand.html" title="class in org.apache.hadoop.tools">CommandShell.SubCommand</a>&nbsp;cmd)</code>&nbsp;</td>
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<h3>Methods inherited from class&nbsp;org.apache.hadoop.conf.<a href="../../../../org/apache/hadoop/conf/Configured.html" title="class in org.apache.hadoop.conf">Configured</a></h3>
<code><a href="../../../../org/apache/hadoop/conf/Configured.html#getConf--">getConf</a>, <a href="../../../../org/apache/hadoop/conf/Configured.html#setConf-org.apache.hadoop.conf.Configuration-">setConf</a></code></li>
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<code><a href="../../../../org/apache/hadoop/conf/Configurable.html#getConf--">getConf</a>, <a href="../../../../org/apache/hadoop/conf/Configurable.html#setConf-org.apache.hadoop.conf.Configuration-">setConf</a></code></li>
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<h4>CommandShell</h4>
<pre>public&nbsp;CommandShell()</pre>
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<h4>getCommandUsage</h4>
<pre>public abstract&nbsp;<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;getCommandUsage()</pre>
<div class="block">Return usage string for the command including any summary of subcommands.</div>
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<h4>setSubCommand</h4>
<pre>public&nbsp;void&nbsp;setSubCommand(<a href="../../../../org/apache/hadoop/tools/CommandShell.SubCommand.html" title="class in org.apache.hadoop.tools">CommandShell.SubCommand</a>&nbsp;cmd)</pre>
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<h4>setOut</h4>
<pre>public&nbsp;void&nbsp;setOut(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a>&nbsp;p)</pre>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a>&nbsp;getOut()</pre>
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<pre>public&nbsp;void&nbsp;setErr(<a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a>&nbsp;p)</pre>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/io/PrintStream.html?is-external=true" title="class or interface in java.io">PrintStream</a>&nbsp;getErr()</pre>
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<h4>run</h4>
<pre>public&nbsp;int&nbsp;run(<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;args)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../org/apache/hadoop/util/Tool.html#run-java.lang.String:A-">Tool</a></code></span></div>
<div class="block">Execute the command with the given arguments.</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../org/apache/hadoop/util/Tool.html#run-java.lang.String:A-">run</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../org/apache/hadoop/util/Tool.html" title="interface in org.apache.hadoop.util">Tool</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>args</code> - command specific arguments.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>exit code.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<h4>init</h4>
<pre>protected abstract&nbsp;int&nbsp;init(<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;args)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block">Parse the command line arguments and initialize subcommand instance.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>args</code> - </dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>0 if the argument(s) were recognized, 1 otherwise</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code></dd>
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<pre>protected final&nbsp;void&nbsp;printShellUsage()</pre>
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<pre>protected&nbsp;void&nbsp;printException(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a>&nbsp;ex)</pre>
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