## Uses of Class
org.apache.hadoop.mapreduce.Reducer.Context

Packages that use Reducer.Context
org.apache.hadoop.examples: Hadoop example code.
org.apache.hadoop.mapred: A software framework for easily writing applications which process vast amounts of data (multi-terabyte data-sets) parallelly on large clusters (thousands of nodes) built of commodity hardware in a reliable, fault-tolerant manner.
org.apache.hadoop.mapreduce
org.apache.hadoop.mapreduce.lib.fieldsel
org.apache.hadoop.mapreduce.lib.reduce

Uses of Reducer.Context in org.apache.hadoop.examples

Methods in org.apache.hadoop.examples with parameters of type Reducer.Context
`void` `SecondarySort.Reduce.reduce(SecondarySort.IntPair key, Iterable<IntWritable> values, Reducer.Context context)`
`void` `WordCount.IntSumReducer.reduce(Text key, Iterable<IntWritable> values, Reducer.Context context)`

Uses of Reducer.Context in org.apache.hadoop.mapred

Methods in org.apache.hadoop.mapred that return Reducer.Context

`protected static

`<INKEY,INVALUE,OUTKEY,OUTVALUE> Reducer.Context`

`

`Task.createReduceContext(Reducer<INKEY,INVALUE,OUTKEY,OUTVALUE> reducer, Configuration job, TaskAttemptID taskId, RawKeyValueIterator rIter, Counter inputKeyCounter, Counter inputValueCounter, RecordWriter<OUTKEY,OUTVALUE> output, OutputCommitter committer, StatusReporter reporter, RawComparator<INKEY> comparator, Class<INKEY> keyClass, Class<INVALUE> valueClass)`

Uses of Reducer.Context in org.apache.hadoop.mapreduce

Methods in org.apache.hadoop.mapreduce with parameters of type Reducer.Context
`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.fieldsel

Methods in org.apache.hadoop.mapreduce.lib.fieldsel with parameters of type Reducer.Context
`void` `FieldSelectionReducer.reduce(Text key, Iterable<Text> values, Reducer.Context context)`
`void` `FieldSelectionReducer.setup(Reducer.Context context)`

Uses of Reducer.Context in org.apache.hadoop.mapreduce.lib.reduce

Methods in org.apache.hadoop.mapreduce.lib.reduce with parameters of type Reducer.Context
`void` `IntSumReducer.reduce(Key key, Iterable<IntWritable> values, Reducer.Context context)`
`void` `LongSumReducer.reduce(KEY key, Iterable<LongWritable> values, Reducer.Context context)`

Copyright © 2009 The Apache Software Foundation