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Packages that use MapReduceBase | |
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org.apache.hadoop.examples | Hadoop example code. |
org.apache.hadoop.examples.dancing | This package is a distributed implementation of Knuth's dancing links algorithm that can run under Hadoop. |
org.apache.hadoop.hbase.mapred | |
org.apache.hadoop.mapred.lib | Library of generally useful mappers, reducers, and partitioners. |
org.apache.hadoop.tools |
Uses of MapReduceBase in org.apache.hadoop.examples |
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Subclasses of MapReduceBase in org.apache.hadoop.examples | |
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static class |
PiEstimator.PiMapper
Mappper class for Pi estimation. |
static class |
PiEstimator.PiReducer
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static class |
WordCount.MapClass
Counts the words in each line. |
static class |
WordCount.Reduce
A reducer class that just emits the sum of the input values. |
Uses of MapReduceBase in org.apache.hadoop.examples.dancing |
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Subclasses of MapReduceBase in org.apache.hadoop.examples.dancing | |
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static class |
DistributedPentomino.PentMap
Each map takes a line, which represents a prefix move and finds all of the solutions that start with that prefix. |
Uses of MapReduceBase in org.apache.hadoop.hbase.mapred |
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Subclasses of MapReduceBase in org.apache.hadoop.hbase.mapred | |
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class |
GroupingTableMap
Extract grouping columns from input record |
class |
IdentityTableMap
Pass the given key and record as-is to reduce |
class |
IdentityTableReduce
Write to table each key, record pair |
class |
IndexTableReduce
Construct a Lucene document per row, which is consumed by IndexOutputFormat to build a Lucene index |
class |
TableMap<K extends WritableComparable,V extends Writable>
Scan an HBase table to sort by a specified sort column. |
class |
TableReduce<K extends WritableComparable,V extends Writable>
Write a table, sorting by the input key |
Uses of MapReduceBase in org.apache.hadoop.mapred.lib |
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Subclasses of MapReduceBase in org.apache.hadoop.mapred.lib | |
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class |
IdentityMapper<K extends WritableComparable,V extends Writable>
Implements the identity function, mapping inputs directly to outputs. |
class |
IdentityReducer<K extends WritableComparable,V extends Writable>
Performs no reduction, writing all input values directly to the output. |
class |
InverseMapper<K extends WritableComparable,V extends WritableComparable>
A Mapper that swaps keys and values. |
class |
LongSumReducer<K extends WritableComparable>
A Reducer that sums long values. |
class |
RegexMapper<K extends WritableComparable>
A Mapper that extracts text matching a regular expression. |
class |
TokenCountMapper<K extends WritableComparable>
A Mapper that maps text values into |
Uses of MapReduceBase in org.apache.hadoop.tools |
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Subclasses of MapReduceBase in org.apache.hadoop.tools | |
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static class |
Logalyzer.LogRegexMapper<K extends WritableComparable>
A Mapper that extracts text matching a regular expression. |
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