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Packages that use Mapper | |
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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.examples.pi | This package consists of a map/reduce application, distbbp, which computes exact binary digits of the mathematical constant π. |
org.apache.hadoop.examples.terasort | This package consists of 3 map/reduce applications for Hadoop to compete in the annual terabyte sort competition. |
org.apache.hadoop.mapreduce | |
org.apache.hadoop.mapreduce.lib.aggregate | Classes for performing various counting and aggregations. |
org.apache.hadoop.mapreduce.lib.chain | |
org.apache.hadoop.mapreduce.lib.fieldsel | |
org.apache.hadoop.mapreduce.lib.input | |
org.apache.hadoop.mapreduce.lib.map | |
org.apache.hadoop.mapreduce.lib.reduce |
Uses of Mapper in org.apache.hadoop.examples |
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Subclasses of Mapper in org.apache.hadoop.examples | |
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static class |
BaileyBorweinPlouffe.BbpMapper
Mapper class computing digits of Pi. |
static class |
MultiFileWordCount.MapClass
This Mapper is similar to the one in MultiFileWordCount.MapClass . |
static class |
QuasiMonteCarlo.QmcMapper
Mapper class for Pi estimation. |
static class |
SecondarySort.MapClass
Read two integers from each line and generate a key, value pair as ((left, right), right). |
static class |
WordCount.TokenizerMapper
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Uses of Mapper in org.apache.hadoop.examples.dancing |
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Subclasses of Mapper 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 Mapper in org.apache.hadoop.examples.pi |
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Subclasses of Mapper in org.apache.hadoop.examples.pi | |
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static class |
DistSum.MapSide.SummingMapper
A mapper which computes sums |
static class |
DistSum.ReduceSide.PartitionMapper
A Mapper which partitions a summation |
Uses of Mapper in org.apache.hadoop.examples.terasort |
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Subclasses of Mapper in org.apache.hadoop.examples.terasort | |
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static class |
TeraGen.SortGenMapper
The Mapper class that given a row number, will generate the appropriate output line. |
Uses of Mapper in org.apache.hadoop.mapreduce |
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Methods in org.apache.hadoop.mapreduce that return types with arguments of type Mapper | |
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Class<? extends Mapper<?,?,?,?>> |
JobContext.getMapperClass()
Get the Mapper class for the job. |
Method parameters in org.apache.hadoop.mapreduce with type arguments of type Mapper | |
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void |
Job.setMapperClass(Class<? extends Mapper> cls)
Set the Mapper for the job. |
Uses of Mapper in org.apache.hadoop.mapreduce.lib.aggregate |
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Subclasses of Mapper in org.apache.hadoop.mapreduce.lib.aggregate | |
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class |
ValueAggregatorMapper<K1 extends WritableComparable<?>,V1 extends Writable>
This class implements the generic mapper of Aggregate. |
Uses of Mapper in org.apache.hadoop.mapreduce.lib.chain |
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Subclasses of Mapper in org.apache.hadoop.mapreduce.lib.chain | |
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class |
ChainMapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
The ChainMapper class allows to use multiple Mapper classes within a single Map task. |
Method parameters in org.apache.hadoop.mapreduce.lib.chain with type arguments of type Mapper | |
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static void |
ChainReducer.addMapper(Job job,
Class<? extends Mapper> klass,
Class<?> inputKeyClass,
Class<?> inputValueClass,
Class<?> outputKeyClass,
Class<?> outputValueClass,
org.apache.hadoop.conf.Configuration mapperConf)
Adds a Mapper class to the chain reducer. |
static void |
ChainMapper.addMapper(Job job,
Class<? extends Mapper> klass,
Class<?> inputKeyClass,
Class<?> inputValueClass,
Class<?> outputKeyClass,
Class<?> outputValueClass,
org.apache.hadoop.conf.Configuration mapperConf)
Adds a Mapper class to the chain mapper. |
Uses of Mapper in org.apache.hadoop.mapreduce.lib.fieldsel |
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Subclasses of Mapper in org.apache.hadoop.mapreduce.lib.fieldsel | |
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class |
FieldSelectionMapper<K,V>
This class implements a mapper class that can be used to perform field selections in a manner similar to unix cut. |
Uses of Mapper in org.apache.hadoop.mapreduce.lib.input |
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Method parameters in org.apache.hadoop.mapreduce.lib.input with type arguments of type Mapper | |
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static void |
MultipleInputs.addInputPath(Job job,
org.apache.hadoop.fs.Path path,
Class<? extends InputFormat> inputFormatClass,
Class<? extends Mapper> mapperClass)
Add a Path with a custom InputFormat and
Mapper to the list of inputs for the map-reduce job. |
Uses of Mapper in org.apache.hadoop.mapreduce.lib.map |
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Subclasses of Mapper in org.apache.hadoop.mapreduce.lib.map | |
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class |
InverseMapper<K,V>
A Mapper that swaps keys and values. |
class |
MultithreadedMapper<K1,V1,K2,V2>
Multithreaded implementation for @link org.apache.hadoop.mapreduce.Mapper. |
class |
RegexMapper<K>
A Mapper that extracts text matching a regular expression. |
class |
TokenCounterMapper
Tokenize the input values and emit each word with a count of 1. |
class |
WrappedMapper<KEYIN,VALUEIN,KEYOUT,VALUEOUT>
A Mapper which wraps a given one to allow custom
WrappedMapper.Context implementations. |
Methods in org.apache.hadoop.mapreduce.lib.map that return types with arguments of type Mapper | ||
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Class<? extends Mapper<?,?,?,?>> |
WrappedMapper.Context.getMapperClass()
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static
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MultithreadedMapper.getMapperClass(JobContext job)
Get the application's mapper class. |
Method parameters in org.apache.hadoop.mapreduce.lib.map with type arguments of type Mapper | ||
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static
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MultithreadedMapper.setMapperClass(Job job,
Class<? extends Mapper<K1,V1,K2,V2>> cls)
Set the application's mapper class. |
Uses of Mapper in org.apache.hadoop.mapreduce.lib.reduce |
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Methods in org.apache.hadoop.mapreduce.lib.reduce that return types with arguments of type Mapper | |
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Class<? extends Mapper<?,?,?,?>> |
WrappedReducer.Context.getMapperClass()
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