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| <h1 title="Package" class="title">Package org.apache.hadoop.mapred.lib.aggregate</h1> |
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| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregator.html" title="interface in org.apache.hadoop.mapred.lib.aggregate">ValueAggregator</a><E></td> |
| <td class="colLast"> |
| <div class="block">This interface defines the minimal protocol for value aggregators.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorDescriptor.html" title="interface in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorDescriptor</a></td> |
| <td class="colLast"> |
| <div class="block">This interface defines the contract a value aggregator descriptor must |
| support.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </li> |
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| <table class="typeSummary" border="0" cellpadding="3" cellspacing="0" summary="Class Summary table, listing classes, and an explanation"> |
| <caption><span>Class Summary</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Class</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/DoubleValueSum.html" title="class in org.apache.hadoop.mapred.lib.aggregate">DoubleValueSum</a></td> |
| <td class="colLast"> |
| <div class="block">This class implements a value aggregator that sums up a sequence of double |
| values.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/LongValueMax.html" title="class in org.apache.hadoop.mapred.lib.aggregate">LongValueMax</a></td> |
| <td class="colLast"> |
| <div class="block">This class implements a value aggregator that maintain the maximum of |
| a sequence of long values.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/LongValueMin.html" title="class in org.apache.hadoop.mapred.lib.aggregate">LongValueMin</a></td> |
| <td class="colLast"> |
| <div class="block">This class implements a value aggregator that maintain the minimum of |
| a sequence of long values.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/LongValueSum.html" title="class in org.apache.hadoop.mapred.lib.aggregate">LongValueSum</a></td> |
| <td class="colLast"> |
| <div class="block">This class implements a value aggregator that sums up |
| a sequence of long values.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/StringValueMax.html" title="class in org.apache.hadoop.mapred.lib.aggregate">StringValueMax</a></td> |
| <td class="colLast"> |
| <div class="block">This class implements a value aggregator that maintain the biggest of |
| a sequence of strings.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/StringValueMin.html" title="class in org.apache.hadoop.mapred.lib.aggregate">StringValueMin</a></td> |
| <td class="colLast"> |
| <div class="block">This class implements a value aggregator that maintain the smallest of |
| a sequence of strings.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/UniqValueCount.html" title="class in org.apache.hadoop.mapred.lib.aggregate">UniqValueCount</a></td> |
| <td class="colLast"> |
| <div class="block">This class implements a value aggregator that dedupes a sequence of objects.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/UserDefinedValueAggregatorDescriptor.html" title="class in org.apache.hadoop.mapred.lib.aggregate">UserDefinedValueAggregatorDescriptor</a></td> |
| <td class="colLast"> |
| <div class="block">This class implements a wrapper for a user defined value aggregator |
| descriptor.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorBaseDescriptor.html" title="class in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorBaseDescriptor</a></td> |
| <td class="colLast"> |
| <div class="block">This class implements the common functionalities of |
| the subclasses of ValueAggregatorDescriptor class.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorCombiner.html" title="class in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorCombiner</a><K1 extends <a href="../../../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io">WritableComparable</a>,V1 extends <a href="../../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</a>></td> |
| <td class="colLast"> |
| <div class="block">This class implements the generic combiner of Aggregate.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorJob.html" title="class in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorJob</a></td> |
| <td class="colLast"> |
| <div class="block">This is the main class for creating a map/reduce job using Aggregate |
| framework.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorJobBase.html" title="class in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorJobBase</a><K1 extends <a href="../../../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io">WritableComparable</a>,V1 extends <a href="../../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</a>></td> |
| <td class="colLast"> |
| <div class="block">This abstract class implements some common functionalities of the |
| the generic mapper, reducer and combiner classes of Aggregate.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorMapper.html" title="class in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorMapper</a><K1 extends <a href="../../../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io">WritableComparable</a>,V1 extends <a href="../../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</a>></td> |
| <td class="colLast"> |
| <div class="block">This class implements the generic mapper of Aggregate.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueAggregatorReducer.html" title="class in org.apache.hadoop.mapred.lib.aggregate">ValueAggregatorReducer</a><K1 extends <a href="../../../../../../org/apache/hadoop/io/WritableComparable.html" title="interface in org.apache.hadoop.io">WritableComparable</a>,V1 extends <a href="../../../../../../org/apache/hadoop/io/Writable.html" title="interface in org.apache.hadoop.io">Writable</a>></td> |
| <td class="colLast"> |
| <div class="block">This class implements the generic reducer of Aggregate.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><a href="../../../../../../org/apache/hadoop/mapred/lib/aggregate/ValueHistogram.html" title="class in org.apache.hadoop.mapred.lib.aggregate">ValueHistogram</a></td> |
| <td class="colLast"> |
| <div class="block">This class implements a value aggregator that computes the |
| histogram of a sequence of strings.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </li> |
| </ul> |
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