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Packages that use Reducer.Context | |
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org.apache.hadoop.examples | Hadoop example code. |
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.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.reduce |
Uses of Reducer.Context in org.apache.hadoop.examples |
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Methods in org.apache.hadoop.examples with parameters of type Reducer.Context | |
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void |
QuasiMonteCarlo.QmcReducer.cleanup(Reducer.Context context)
Reduce task done, write output to a file. |
protected void |
BaileyBorweinPlouffe.BbpReducer.cleanup(Reducer.Context context)
Write output to files. |
void |
QuasiMonteCarlo.QmcReducer.reduce(org.apache.hadoop.io.BooleanWritable isInside,
Iterable<org.apache.hadoop.io.LongWritable> values,
Reducer.Context context)
Accumulate number of points inside/outside results from the mappers. |
protected void |
BaileyBorweinPlouffe.BbpReducer.reduce(org.apache.hadoop.io.LongWritable offset,
Iterable<org.apache.hadoop.io.BytesWritable> values,
Reducer.Context context)
Concatenate map outputs. |
void |
SecondarySort.Reduce.reduce(SecondarySort.IntPair key,
Iterable<org.apache.hadoop.io.IntWritable> values,
Reducer.Context context)
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void |
WordCount.IntSumReducer.reduce(org.apache.hadoop.io.Text key,
Iterable<org.apache.hadoop.io.IntWritable> values,
Reducer.Context context)
|
Uses of Reducer.Context in org.apache.hadoop.examples.pi |
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Methods in org.apache.hadoop.examples.pi with parameters of type Reducer.Context | |
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protected void |
DistSum.ReduceSide.SummingReducer.reduce(org.apache.hadoop.io.IntWritable index,
Iterable<SummationWritable> sums,
Reducer.Context context)
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Uses of Reducer.Context in org.apache.hadoop.mapreduce |
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Methods in org.apache.hadoop.mapreduce with parameters of type Reducer.Context | |
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protected void |
Reducer.cleanup(Reducer.Context context)
Called once at the end of the task. |
protected void |
Reducer.reduce(KEYIN key,
Iterable<VALUEIN> values,
Reducer.Context context)
This method is called once for each key. |
void |
Reducer.run(Reducer.Context context)
Advanced application writers can use the Reducer.run(org.apache.hadoop.mapreduce.Reducer.Context) method to
control how the reduce task works. |
protected void |
Reducer.setup(Reducer.Context context)
Called once at the start of the task. |
Uses of Reducer.Context in org.apache.hadoop.mapreduce.lib.aggregate |
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Methods in org.apache.hadoop.mapreduce.lib.aggregate with parameters of type Reducer.Context | |
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void |
ValueAggregatorCombiner.reduce(org.apache.hadoop.io.Text key,
Iterable<org.apache.hadoop.io.Text> values,
Reducer.Context context)
Combines values for a given key. |
void |
ValueAggregatorReducer.reduce(org.apache.hadoop.io.Text key,
Iterable<org.apache.hadoop.io.Text> values,
Reducer.Context context)
|
void |
ValueAggregatorReducer.setup(Reducer.Context context)
|
Uses of Reducer.Context in org.apache.hadoop.mapreduce.lib.chain |
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Methods in org.apache.hadoop.mapreduce.lib.chain with parameters of type Reducer.Context | |
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void |
ChainReducer.run(Reducer.Context context)
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protected void |
ChainReducer.setup(Reducer.Context context)
|
Uses of Reducer.Context in org.apache.hadoop.mapreduce.lib.fieldsel |
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Methods in org.apache.hadoop.mapreduce.lib.fieldsel with parameters of type Reducer.Context | |
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void |
FieldSelectionReducer.reduce(org.apache.hadoop.io.Text key,
Iterable<org.apache.hadoop.io.Text> values,
Reducer.Context context)
|
void |
FieldSelectionReducer.setup(Reducer.Context context)
|
Uses of Reducer.Context in org.apache.hadoop.mapreduce.lib.reduce |
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Subclasses of Reducer.Context in org.apache.hadoop.mapreduce.lib.reduce | |
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class |
WrappedReducer.Context
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Methods in org.apache.hadoop.mapreduce.lib.reduce that return Reducer.Context | |
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Reducer.Context |
WrappedReducer.getReducerContext(ReduceContext<KEYIN,VALUEIN,KEYOUT,VALUEOUT> reduceContext)
A a wrapped WrappedReducer.Context for custom implementations. |
Methods in org.apache.hadoop.mapreduce.lib.reduce with parameters of type Reducer.Context | |
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void |
IntSumReducer.reduce(Key key,
Iterable<org.apache.hadoop.io.IntWritable> values,
Reducer.Context context)
|
void |
LongSumReducer.reduce(KEY key,
Iterable<org.apache.hadoop.io.LongWritable> values,
Reducer.Context context)
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