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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  <html lang="en"> <head>  <title>HadoopCompat (apache-cassandra API)</title> <meta name="date" content="2014-09-07"> <link rel="stylesheet" type="text/css" href="../../../../stylesheet.css" title="Style"> </head> <body> <script type="text/javascript"> </script> <noscript> <div>JavaScript is disabled on your browser.</div> </noscript>  <div class="topNav"><a name="navbar_top">  </a><a href="#skip-navbar_top" title="Skip navigation links"></a><a name="navbar_top_firstrow">  </a> <ul class="navList" title="Navigation"> <li><a href="../../../../overview-summary.html">Overview</a></li> <li><a href="package-summary.html">Package</a></li> <li class="navBarCell1Rev">Class</li> <li><a href="class-use/HadoopCompat.html">Use</a></li> <li><a href="package-tree.html">Tree</a></li> <li><a href="../../../../deprecated-list.html">Deprecated</a></li> <li><a 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href="#constructor_summary">Constr</a> | </li> <li><a href="#method_summary">Method</a></li> </ul> <ul class="subNavList"> <li>Detail: </li> <li>Field | </li> <li><a href="#constructor_detail">Constr</a> | </li> <li><a href="#method_detail">Method</a></li> </ul> </div> <a name="skip-navbar_top">  </a></div>   <div class="header"> <div class="subTitle">org.apache.cassandra.hadoop</div> <h2 title="Class HadoopCompat" class="title">Class HadoopCompat</h2> </div> <div class="contentContainer"> <ul class="inheritance"> <li>java.lang.Object</li> <li> <ul class="inheritance"> <li>org.apache.cassandra.hadoop.HadoopCompat</li> </ul> </li> </ul> <div class="description"> <ul class="blockList"> <li class="blockList"> <hr> <br> <pre>public class <span class="strong">HadoopCompat</span> extends java.lang.Object</pre> <div class="block">Utility methods to allow applications to deal with inconsistencies between MapReduce Context Objects API between Hadoop 1.x and 2.x.</div> </li> </ul> </div> <div class="summary"> <ul class="blockList"> <li class="blockList">  <ul class="blockList"> <li class="blockList"><a name="constructor_summary">  </a> <h3>Constructor Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> <caption><span>Constructors</span><span class="tabEnd"> </span></caption> <tr> <th class="colOne" scope="col">Constructor and Description</th> </tr> <tr class="altColor"> <td class="colOne"><code><strong><a href="../../../../org/apache/cassandra/hadoop/HadoopCompat.html#HadoopCompat()">HadoopCompat</a></strong>()</code> </td> </tr> </table> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="method_summary">  </a> <h3>Method Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> <caption><span>Methods</span><span class="tabEnd"> </span></caption> <tr> <th class="colFirst" scope="col">Modifier and Type</th> <th class="colLast" scope="col">Method and Description</th> </tr> <tr class="altColor"> <td class="colFirst"><code>static org.apache.hadoop.conf.Configuration</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/hadoop/HadoopCompat.html#getConfiguration(org.apache.hadoop.mapreduce.JobContext)">getConfiguration</a></strong>(org.apache.hadoop.mapreduce.JobContext context)</code> <div class="block">Invoke getConfiguration() on JobContext.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static org.apache.hadoop.mapreduce.Counter</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/hadoop/HadoopCompat.html#getCounter(org.apache.hadoop.mapreduce.TaskInputOutputContext,%20java.lang.String,%20java.lang.String)">getCounter</a></strong>(org.apache.hadoop.mapreduce.TaskInputOutputContext context, java.lang.String groupName, java.lang.String counterName)</code> <div class="block">Invoke getCounter() on TaskInputOutputContext.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static org.apache.hadoop.mapreduce.TaskAttemptID</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/hadoop/HadoopCompat.html#getTaskAttemptID(org.apache.hadoop.mapreduce.TaskAttemptContext)">getTaskAttemptID</a></strong>(org.apache.hadoop.mapreduce.TaskAttemptContext taskContext)</code> <div class="block">returns TaskAttemptContext.getTaskAttemptID().</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/hadoop/HadoopCompat.html#incrementCounter(org.apache.hadoop.mapreduce.Counter,%20long)">incrementCounter</a></strong>(org.apache.hadoop.mapreduce.Counter counter, long increment)</code> <div class="block">Increment the counter.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static boolean</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/hadoop/HadoopCompat.html#isVersion2x()">isVersion2x</a></strong>()</code> <div class="block">True if runtime Hadoop version is 2.x, false otherwise.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static org.apache.hadoop.mapreduce.Counter</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/hadoop/HadoopCompat.html#newGenericCounter(java.lang.String,%20java.lang.String,%20long)">newGenericCounter</a></strong>(java.lang.String name, java.lang.String displayName, long value)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static org.apache.hadoop.mapreduce.JobContext</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/hadoop/HadoopCompat.html#newJobContext(org.apache.hadoop.conf.Configuration,%20org.apache.hadoop.mapreduce.JobID)">newJobContext</a></strong>(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.mapreduce.JobID jobId)</code> <div class="block">Creates JobContext from a JobConf and jobId using the correct constructor for based on Hadoop version.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static org.apache.hadoop.mapreduce.MapContext</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/hadoop/HadoopCompat.html#newMapContext(org.apache.hadoop.conf.Configuration,%20org.apache.hadoop.mapreduce.TaskAttemptID,%20org.apache.hadoop.mapreduce.RecordReader,%20org.apache.hadoop.mapreduce.RecordWriter,%20org.apache.hadoop.mapreduce.OutputCommitter,%20org.apache.hadoop.mapreduce.StatusReporter,%20org.apache.hadoop.mapreduce.InputSplit)">newMapContext</a></strong>(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.mapreduce.TaskAttemptID taskAttemptID, org.apache.hadoop.mapreduce.RecordReader recordReader, org.apache.hadoop.mapreduce.RecordWriter recordWriter, org.apache.hadoop.mapreduce.OutputCommitter outputCommitter, org.apache.hadoop.mapreduce.StatusReporter statusReporter, org.apache.hadoop.mapreduce.InputSplit inputSplit)</code> <div class="block">Instantiates MapContext under Hadoop 1 and MapContextImpl under Hadoop 2.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static org.apache.hadoop.mapreduce.TaskAttemptContext</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/hadoop/HadoopCompat.html#newTaskAttemptContext(org.apache.hadoop.conf.Configuration,%20org.apache.hadoop.mapreduce.TaskAttemptID)">newTaskAttemptContext</a></strong>(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.mapreduce.TaskAttemptID taskAttemptId)</code> <div class="block">Creates TaskAttempContext from a JobConf and jobId using the correct constructor for based on Hadoop version.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/hadoop/HadoopCompat.html#progress(org.apache.hadoop.mapreduce.TaskAttemptContext)">progress</a></strong>(org.apache.hadoop.mapreduce.TaskAttemptContext context)</code> <div class="block">Invoke TaskAttemptContext.progress().</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/hadoop/HadoopCompat.html#setStatus(org.apache.hadoop.mapreduce.TaskAttemptContext,%20java.lang.String)">setStatus</a></strong>(org.apache.hadoop.mapreduce.TaskAttemptContext context, java.lang.String status)</code> <div class="block">Invoke setStatus() on TaskAttemptContext.</div> </td> </tr> </table> <ul class="blockList"> <li class="blockList"><a name="methods_inherited_from_class_java.lang.Object">  </a> <h3>Methods inherited from class java.lang.Object</h3> <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> </ul> </li> </ul> </li> </ul> </div> <div class="details"> <ul class="blockList"> <li class="blockList">  <ul class="blockList"> <li class="blockList"><a name="constructor_detail">  </a> <h3>Constructor Detail</h3> <a name="HadoopCompat()">  </a> <ul class="blockListLast"> <li class="blockList"> <h4>HadoopCompat</h4> <pre>public HadoopCompat()</pre> </li> </ul> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="method_detail">  </a> <h3>Method Detail</h3> <a name="isVersion2x()">  </a> <ul class="blockList"> <li class="blockList"> <h4>isVersion2x</h4> <pre>public static boolean isVersion2x()</pre> <div class="block">True if runtime Hadoop version is 2.x, false otherwise.</div> </li> </ul> <a name="newJobContext(org.apache.hadoop.conf.Configuration, org.apache.hadoop.mapreduce.JobID)">  </a> <ul class="blockList"> <li class="blockList"> <h4>newJobContext</h4> <pre>public static org.apache.hadoop.mapreduce.JobContext newJobContext(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.mapreduce.JobID jobId)</pre> <div class="block">Creates JobContext from a JobConf and jobId using the correct constructor for based on Hadoop version. <code>jobId</code> could be null.</div> </li> </ul> <a name="newTaskAttemptContext(org.apache.hadoop.conf.Configuration, org.apache.hadoop.mapreduce.TaskAttemptID)">  </a> <ul class="blockList"> <li class="blockList"> <h4>newTaskAttemptContext</h4> <pre>public static org.apache.hadoop.mapreduce.TaskAttemptContext newTaskAttemptContext(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.mapreduce.TaskAttemptID taskAttemptId)</pre> <div class="block">Creates TaskAttempContext from a JobConf and jobId using the correct constructor for based on Hadoop version.</div> </li> </ul> <a name="newMapContext(org.apache.hadoop.conf.Configuration, org.apache.hadoop.mapreduce.TaskAttemptID, org.apache.hadoop.mapreduce.RecordReader, org.apache.hadoop.mapreduce.RecordWriter, org.apache.hadoop.mapreduce.OutputCommitter, org.apache.hadoop.mapreduce.StatusReporter, org.apache.hadoop.mapreduce.InputSplit)">  </a> <ul class="blockList"> <li class="blockList"> <h4>newMapContext</h4> <pre>public static org.apache.hadoop.mapreduce.MapContext newMapContext(org.apache.hadoop.conf.Configuration conf, org.apache.hadoop.mapreduce.TaskAttemptID taskAttemptID, org.apache.hadoop.mapreduce.RecordReader recordReader, org.apache.hadoop.mapreduce.RecordWriter recordWriter, org.apache.hadoop.mapreduce.OutputCommitter outputCommitter, org.apache.hadoop.mapreduce.StatusReporter statusReporter, org.apache.hadoop.mapreduce.InputSplit inputSplit)</pre> <div class="block">Instantiates MapContext under Hadoop 1 and MapContextImpl under Hadoop 2.</div> </li> </ul> <a name="newGenericCounter(java.lang.String, java.lang.String, long)">  </a> <ul class="blockList"> <li class="blockList"> <h4>newGenericCounter</h4> <pre>public static org.apache.hadoop.mapreduce.Counter newGenericCounter(java.lang.String name, java.lang.String displayName, long value)</pre> <dl><dt><span class="strong">Returns:</span></dt><dd>with Hadoop 2 : <code>new GenericCounter(args)</code>,<br> with Hadoop 1 : <code>new Counter(args)</code></dd></dl> </li> </ul> <a name="getConfiguration(org.apache.hadoop.mapreduce.JobContext)">  </a> <ul class="blockList"> <li class="blockList"> <h4>getConfiguration</h4> <pre>public static org.apache.hadoop.conf.Configuration getConfiguration(org.apache.hadoop.mapreduce.JobContext context)</pre> <div class="block">Invoke getConfiguration() on JobContext. Works with both Hadoop 1 and 2.</div> </li> </ul> <a name="setStatus(org.apache.hadoop.mapreduce.TaskAttemptContext, java.lang.String)">  </a> <ul class="blockList"> <li class="blockList"> <h4>setStatus</h4> <pre>public static void setStatus(org.apache.hadoop.mapreduce.TaskAttemptContext context, java.lang.String status)</pre> <div class="block">Invoke setStatus() on TaskAttemptContext. Works with both Hadoop 1 and 2.</div> </li> </ul> <a name="getTaskAttemptID(org.apache.hadoop.mapreduce.TaskAttemptContext)">  </a> <ul class="blockList"> <li class="blockList"> <h4>getTaskAttemptID</h4> <pre>public static org.apache.hadoop.mapreduce.TaskAttemptID getTaskAttemptID(org.apache.hadoop.mapreduce.TaskAttemptContext taskContext)</pre> <div class="block">returns TaskAttemptContext.getTaskAttemptID(). Works with both Hadoop 1 and 2.</div> </li> </ul> <a name="getCounter(org.apache.hadoop.mapreduce.TaskInputOutputContext, java.lang.String, java.lang.String)">  </a> <ul class="blockList"> <li class="blockList"> <h4>getCounter</h4> <pre>public static org.apache.hadoop.mapreduce.Counter getCounter(org.apache.hadoop.mapreduce.TaskInputOutputContext context, java.lang.String groupName, java.lang.String counterName)</pre> <div class="block">Invoke getCounter() on TaskInputOutputContext. Works with both Hadoop 1 and 2.</div> </li> </ul> <a name="progress(org.apache.hadoop.mapreduce.TaskAttemptContext)">  </a> <ul class="blockList"> <li class="blockList"> <h4>progress</h4> <pre>public static void progress(org.apache.hadoop.mapreduce.TaskAttemptContext context)</pre> <div class="block">Invoke TaskAttemptContext.progress(). Works with both Hadoop 1 and 2.</div> </li> </ul> <a name="incrementCounter(org.apache.hadoop.mapreduce.Counter, long)">  </a> <ul class="blockListLast"> <li class="blockList"> <h4>incrementCounter</h4> <pre>public static void incrementCounter(org.apache.hadoop.mapreduce.Counter counter, long increment)</pre> <div class="block">Increment the counter. 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