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<div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.hadoop.hbase.mapreduce</a></div>
<h1 title="Class MultithreadedTableMapper" class="title">Class MultithreadedTableMapper&lt;K2,<wbr>V2&gt;</h1>
</div>
<div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a>
<div class="inheritance">org.apache.hadoop.mapreduce.Mapper&lt;<a href="../io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<wbr><a href="../client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>,<wbr>KEYOUT,<wbr>VALUEOUT&gt;
<div class="inheritance"><a href="TableMapper.html" title="class in org.apache.hadoop.hbase.mapreduce">org.apache.hadoop.hbase.mapreduce.TableMapper</a>&lt;K2,<wbr>V2&gt;
<div class="inheritance">org.apache.hadoop.hbase.mapreduce.MultithreadedTableMapper&lt;K2,<wbr>V2&gt;</div>
</div>
</div>
</div>
<section class="class-description" id="class-description">
<hr>
<div class="type-signature"><span class="annotations">@Private
</span><span class="modifiers">public class </span><span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/MultithreadedTableMapper.html#line-58">MultithreadedTableMapper</a>&lt;K2,<wbr>V2&gt;</span>
<span class="extends-implements">extends <a href="TableMapper.html" title="class in org.apache.hadoop.hbase.mapreduce">TableMapper</a>&lt;K2,<wbr>V2&gt;</span></div>
<div class="block">Multithreaded implementation for @link org.apache.hbase.mapreduce.TableMapper
<p>
It can be used instead when the Map operation is not CPU bound in order to improve throughput.
<p>
Mapper implementations using this MapRunnable must be thread-safe.
<p>
The Map-Reduce job has to be configured with the mapper to use via <a href="#setMapperClass(org.apache.hadoop.mapreduce.Job,java.lang.Class)"><code>setMapperClass(org.apache.hadoop.mapreduce.Job, java.lang.Class&lt;? extends org.apache.hadoop.mapreduce.Mapper&lt;org.apache.hadoop.hbase.io.ImmutableBytesWritable, org.apache.hadoop.hbase.client.Result, K2, V2&gt;&gt;)</code></a> and
the number of thread the thread-pool can use with the <a href="#getNumberOfThreads(org.apache.hadoop.mapreduce.JobContext)"><code>getNumberOfThreads(org.apache.hadoop.mapreduce.JobContext)</code></a> method. The
default value is 10 threads.
<p></div>
</section>
<section class="summary">
<ul class="summary-list">
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<section class="nested-class-summary" id="nested-class-summary">
<h2>Nested Class Summary</h2>
<div class="caption"><span>Nested Classes</span></div>
<div class="summary-table three-column-summary">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Class</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color"><code>private class&nbsp;</code></div>
<div class="col-second even-row-color"><code><a href="MultithreadedTableMapper.MapRunner.html" class="type-name-link" title="class in org.apache.hadoop.hbase.mapreduce">MultithreadedTableMapper.MapRunner</a></code></div>
<div class="col-last even-row-color">&nbsp;</div>
<div class="col-first odd-row-color"><code>private class&nbsp;</code></div>
<div class="col-second odd-row-color"><code><a href="MultithreadedTableMapper.SubMapRecordReader.html" class="type-name-link" title="class in org.apache.hadoop.hbase.mapreduce">MultithreadedTableMapper.SubMapRecordReader</a></code></div>
<div class="col-last odd-row-color">&nbsp;</div>
<div class="col-first even-row-color"><code>private class&nbsp;</code></div>
<div class="col-second even-row-color"><code><a href="MultithreadedTableMapper.SubMapRecordWriter.html" class="type-name-link" title="class in org.apache.hadoop.hbase.mapreduce">MultithreadedTableMapper.SubMapRecordWriter</a></code></div>
<div class="col-last even-row-color">&nbsp;</div>
<div class="col-first odd-row-color"><code>private class&nbsp;</code></div>
<div class="col-second odd-row-color"><code><a href="MultithreadedTableMapper.SubMapStatusReporter.html" class="type-name-link" title="class in org.apache.hadoop.hbase.mapreduce">MultithreadedTableMapper.SubMapStatusReporter</a></code></div>
<div class="col-last odd-row-color">&nbsp;</div>
</div>
<div class="inherited-list">
<h2 id="nested-classes-inherited-from-class-org.apache.hadoop.mapreduce.Mapper">Nested classes/interfaces inherited from class&nbsp;org.apache.hadoop.mapreduce.Mapper</h2>
<code>org.apache.hadoop.mapreduce.Mapper.Context</code></div>
</section>
</li>
<!-- =========== FIELD SUMMARY =========== -->
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<section class="field-summary" id="field-summary">
<h2>Field Summary</h2>
<div class="caption"><span>Fields</span></div>
<div class="summary-table three-column-summary">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Field</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color"><code>private <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/concurrent/ExecutorService.html" title="class or interface in java.util.concurrent" class="external-link">ExecutorService</a></code></div>
<div class="col-second even-row-color"><code><a href="#executor" class="member-name-link">executor</a></code></div>
<div class="col-last even-row-color">&nbsp;</div>
<div class="col-first odd-row-color"><code>private static final org.slf4j.Logger</code></div>
<div class="col-second odd-row-color"><code><a href="#LOG" class="member-name-link">LOG</a></code></div>
<div class="col-last odd-row-color">&nbsp;</div>
<div class="col-first even-row-color"><code>private <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&lt;? extends org.apache.hadoop.mapreduce.Mapper&lt;<a href="../io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<wbr><a href="../client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>,<wbr><a href="MultithreadedTableMapper.html" title="type parameter in MultithreadedTableMapper">K2</a>,<wbr><a href="MultithreadedTableMapper.html" title="type parameter in MultithreadedTableMapper">V2</a>&gt;&gt;</code></div>
<div class="col-second even-row-color"><code><a href="#mapClass" class="member-name-link">mapClass</a></code></div>
<div class="col-last even-row-color">&nbsp;</div>
<div class="col-first odd-row-color"><code>static final <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
<div class="col-second odd-row-color"><code><a href="#MAPPER_CLASS" class="member-name-link">MAPPER_CLASS</a></code></div>
<div class="col-last odd-row-color">&nbsp;</div>
<div class="col-first even-row-color"><code>static final <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
<div class="col-second even-row-color"><code><a href="#NUMBER_OF_THREADS" class="member-name-link">NUMBER_OF_THREADS</a></code></div>
<div class="col-last even-row-color">&nbsp;</div>
<div class="col-first odd-row-color"><code>private org.apache.hadoop.mapreduce.Mapper&lt;<a href="../io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<wbr><a href="../client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>,<wbr><a href="MultithreadedTableMapper.html" title="type parameter in MultithreadedTableMapper">K2</a>,<wbr><a href="MultithreadedTableMapper.html" title="type parameter in MultithreadedTableMapper">V2</a>&gt;.org.apache.hadoop.mapreduce.Mapper.Context</code></div>
<div class="col-second odd-row-color"><code><a href="#outer" class="member-name-link">outer</a></code></div>
<div class="col-last odd-row-color">&nbsp;</div>
</div>
</section>
</li>
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
<li>
<section class="constructor-summary" id="constructor-summary">
<h2>Constructor Summary</h2>
<div class="caption"><span>Constructors</span></div>
<div class="summary-table two-column-summary">
<div class="table-header col-first">Constructor</div>
<div class="table-header col-last">Description</div>
<div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E()" class="member-name-link">MultithreadedTableMapper</a>()</code></div>
<div class="col-last even-row-color">&nbsp;</div>
</div>
</section>
</li>
<!-- ========== METHOD SUMMARY =========== -->
<li>
<section class="method-summary" id="method-summary">
<h2>Method Summary</h2>
<div id="method-summary-table">
<div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab1" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab1', 3)" class="table-tab">Static Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div>
<div id="method-summary-table.tabpanel" role="tabpanel">
<div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0">
<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Method</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static &lt;K2,<wbr>
V2&gt;&nbsp;<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&lt;org.apache.hadoop.mapreduce.Mapper&lt;<a href="../io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<wbr><a href="../client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>,<wbr>K2,<wbr>V2&gt;&gt;</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#getMapperClass(org.apache.hadoop.mapreduce.JobContext)" class="member-name-link">getMapperClass</a><wbr>(org.apache.hadoop.mapreduce.JobContext&nbsp;job)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">
<div class="block">Get the application's mapper class.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static int</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#getNumberOfThreads(org.apache.hadoop.mapreduce.JobContext)" class="member-name-link">getNumberOfThreads</a><wbr>(org.apache.hadoop.mapreduce.JobContext&nbsp;job)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">
<div class="block">The number of threads in the thread pool that will run the map function.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#run(org.apache.hadoop.mapreduce.Mapper.Context)" class="member-name-link">run</a><wbr>(org.apache.hadoop.mapreduce.Mapper&lt;<a href="../io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<wbr><a href="../client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>,<wbr><a href="MultithreadedTableMapper.html" title="type parameter in MultithreadedTableMapper">K2</a>,<wbr><a href="MultithreadedTableMapper.html" title="type parameter in MultithreadedTableMapper">V2</a>&gt;.org.apache.hadoop.mapreduce.Mapper.Context&nbsp;context)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Run the application's maps using a thread pool.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static &lt;K2,<wbr>
V2&gt;&nbsp;void</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#setMapperClass(org.apache.hadoop.mapreduce.Job,java.lang.Class)" class="member-name-link">setMapperClass</a><wbr>(org.apache.hadoop.mapreduce.Job&nbsp;job,
<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&lt;? extends org.apache.hadoop.mapreduce.Mapper&lt;<a href="../io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<wbr><a href="../client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>,<wbr>K2,<wbr>V2&gt;&gt;&nbsp;cls)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">
<div class="block">Set the application's mapper class.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static void</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#setNumberOfThreads(org.apache.hadoop.mapreduce.Job,int)" class="member-name-link">setNumberOfThreads</a><wbr>(org.apache.hadoop.mapreduce.Job&nbsp;job,
int&nbsp;threads)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">
<div class="block">Set the number of threads in the pool for running maps.</div>
</div>
</div>
</div>
</div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.apache.hadoop.mapreduce.Mapper">Methods inherited from class&nbsp;org.apache.hadoop.mapreduce.Mapper</h3>
<code>cleanup, map, setup</code></div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3>
<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div>
</section>
</li>
</ul>
</section>
<section class="details">
<ul class="details-list">
<!-- ============ FIELD DETAIL =========== -->
<li>
<section class="field-details" id="field-detail">
<h2>Field Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="LOG">
<h3>LOG</h3>
<div class="member-signature"><span class="modifiers">private static final</span>&nbsp;<span class="return-type">org.slf4j.Logger</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/MultithreadedTableMapper.html#line-60">LOG</a></span></div>
</section>
</li>
<li>
<section class="detail" id="mapClass">
<h3>mapClass</h3>
<div class="member-signature"><span class="modifiers">private</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&lt;? extends org.apache.hadoop.mapreduce.Mapper&lt;<a href="../io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<wbr><a href="../client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>,<wbr><a href="MultithreadedTableMapper.html" title="type parameter in MultithreadedTableMapper">K2</a>,<wbr><a href="MultithreadedTableMapper.html" title="type parameter in MultithreadedTableMapper">V2</a>&gt;&gt;</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/MultithreadedTableMapper.html#line-61">mapClass</a></span></div>
</section>
</li>
<li>
<section class="detail" id="outer">
<h3>outer</h3>
<div class="member-signature"><span class="modifiers">private</span>&nbsp;<span class="return-type">org.apache.hadoop.mapreduce.Mapper&lt;<a href="../io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<wbr><a href="../client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>,<wbr><a href="MultithreadedTableMapper.html" title="type parameter in MultithreadedTableMapper">K2</a>,<wbr><a href="MultithreadedTableMapper.html" title="type parameter in MultithreadedTableMapper">V2</a>&gt;.org.apache.hadoop.mapreduce.Mapper.Context</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/MultithreadedTableMapper.html#line-62">outer</a></span></div>
</section>
</li>
<li>
<section class="detail" id="executor">
<h3>executor</h3>
<div class="member-signature"><span class="modifiers">private</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/concurrent/ExecutorService.html" title="class or interface in java.util.concurrent" class="external-link">ExecutorService</a></span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/MultithreadedTableMapper.html#line-63">executor</a></span></div>
</section>
</li>
<li>
<section class="detail" id="NUMBER_OF_THREADS">
<h3>NUMBER_OF_THREADS</h3>
<div class="member-signature"><span class="modifiers">public static final</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/MultithreadedTableMapper.html#line-64">NUMBER_OF_THREADS</a></span></div>
<dl class="notes">
<dt>See Also:</dt>
<dd>
<ul class="see-list">
<li><a href="../../../../../constant-values.html#org.apache.hadoop.hbase.mapreduce.MultithreadedTableMapper.NUMBER_OF_THREADS">Constant Field Values</a></li>
</ul>
</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="MAPPER_CLASS">
<h3>MAPPER_CLASS</h3>
<div class="member-signature"><span class="modifiers">public static final</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/MultithreadedTableMapper.html#line-65">MAPPER_CLASS</a></span></div>
<dl class="notes">
<dt>See Also:</dt>
<dd>
<ul class="see-list">
<li><a href="../../../../../constant-values.html#org.apache.hadoop.hbase.mapreduce.MultithreadedTableMapper.MAPPER_CLASS">Constant Field Values</a></li>
</ul>
</dd>
</dl>
</section>
</li>
</ul>
</section>
</li>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<li>
<section class="constructor-details" id="constructor-detail">
<h2>Constructor Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="&lt;init&gt;()">
<h3>MultithreadedTableMapper</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/MultithreadedTableMapper.html#line-59">MultithreadedTableMapper</a></span>()</div>
</section>
</li>
</ul>
</section>
</li>
<!-- ============ METHOD DETAIL ========== -->
<li>
<section class="method-details" id="method-detail">
<h2>Method Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="getNumberOfThreads(org.apache.hadoop.mapreduce.JobContext)">
<h3>getNumberOfThreads</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/MultithreadedTableMapper.html#line-72">getNumberOfThreads</a></span><wbr><span class="parameters">(org.apache.hadoop.mapreduce.JobContext&nbsp;job)</span></div>
<div class="block">The number of threads in the thread pool that will run the map function.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>job</code> - the job</dd>
<dt>Returns:</dt>
<dd>the number of threads</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="setNumberOfThreads(org.apache.hadoop.mapreduce.Job,int)">
<h3>setNumberOfThreads</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/MultithreadedTableMapper.html#line-81">setNumberOfThreads</a></span><wbr><span class="parameters">(org.apache.hadoop.mapreduce.Job&nbsp;job,
int&nbsp;threads)</span></div>
<div class="block">Set the number of threads in the pool for running maps.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>job</code> - the job to modify</dd>
<dd><code>threads</code> - the new number of threads</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getMapperClass(org.apache.hadoop.mapreduce.JobContext)">
<h3>getMapperClass</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="type-parameters">&lt;K2,<wbr>
V2&gt;</span>
<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&lt;org.apache.hadoop.mapreduce.Mapper&lt;<a href="../io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<wbr><a href="../client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>,<wbr>K2,<wbr>V2&gt;&gt;</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/MultithreadedTableMapper.html#line-92">getMapperClass</a></span><wbr><span class="parameters">(org.apache.hadoop.mapreduce.JobContext&nbsp;job)</span></div>
<div class="block">Get the application's mapper class.</div>
<dl class="notes">
<dt>Type Parameters:</dt>
<dd><code>K2</code> - the map's output key type</dd>
<dd><code>V2</code> - the map's output value type</dd>
<dt>Parameters:</dt>
<dd><code>job</code> - the job</dd>
<dt>Returns:</dt>
<dd>the mapper class to run</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="setMapperClass(org.apache.hadoop.mapreduce.Job,java.lang.Class)">
<h3>setMapperClass</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="type-parameters">&lt;K2,<wbr>
V2&gt;</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/MultithreadedTableMapper.html#line-106">setMapperClass</a></span><wbr><span class="parameters">(org.apache.hadoop.mapreduce.Job&nbsp;job,
<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&lt;? extends org.apache.hadoop.mapreduce.Mapper&lt;<a href="../io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<wbr><a href="../client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>,<wbr>K2,<wbr>V2&gt;&gt;&nbsp;cls)</span></div>
<div class="block">Set the application's mapper class.</div>
<dl class="notes">
<dt>Type Parameters:</dt>
<dd><code>K2</code> - the map output key type</dd>
<dd><code>V2</code> - the map output value type</dd>
<dt>Parameters:</dt>
<dd><code>job</code> - the job to modify</dd>
<dd><code>cls</code> - the class to use as the mapper</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="run(org.apache.hadoop.mapreduce.Mapper.Context)">
<h3>run</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">void</span>&nbsp;<span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/MultithreadedTableMapper.html#line-118">run</a></span><wbr><span class="parameters">(org.apache.hadoop.mapreduce.Mapper&lt;<a href="../io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<wbr><a href="../client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>,<wbr><a href="MultithreadedTableMapper.html" title="type parameter in MultithreadedTableMapper">K2</a>,<wbr><a href="MultithreadedTableMapper.html" title="type parameter in MultithreadedTableMapper">V2</a>&gt;.org.apache.hadoop.mapreduce.Mapper.Context&nbsp;context)</span>
throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a>,
<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/InterruptedException.html" title="class or interface in java.lang" class="external-link">InterruptedException</a></span></div>
<div class="block">Run the application's maps using a thread pool.</div>
<dl class="notes">
<dt>Overrides:</dt>
<dd><code>run</code>&nbsp;in class&nbsp;<code>org.apache.hadoop.mapreduce.Mapper&lt;<a href="../io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<wbr><a href="../client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>,<wbr><a href="MultithreadedTableMapper.html" title="type parameter in MultithreadedTableMapper">K2</a>,<wbr><a href="MultithreadedTableMapper.html" title="type parameter in MultithreadedTableMapper">V2</a>&gt;</code></dd>
<dt>Throws:</dt>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code></dd>
<dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/InterruptedException.html" title="class or interface in java.lang" class="external-link">InterruptedException</a></code></dd>
</dl>
</section>
</li>
</ul>
</section>
</li>
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