org.apache.crunch.fn
Class SFlatMapFunction2<K,V,R>

java.lang.Object
  org.apache.crunch.DoFn<Pair<K,V>,R>
      org.apache.crunch.fn.SFlatMapFunction2<K,V,R>

All Implemented Interfaces:

Serializable, org.apache.spark.api.java.function.FlatMapFunction2<K,V,R>

public abstract class SFlatMapFunction2<K,V,R>
extends DoFn<Pair<K,V>,R>
implements org.apache.spark.api.java.function.FlatMapFunction2<K,V,R>

A Crunch-compatible abstract base class for Spark's FlatMapFunction2. Subclasses of this class may be used against either Crunch PCollections or Spark RDDs.

See Also:

Serialized Form

Constructor Summary

SFlatMapFunction2()

Method Summary

void	process(Pair<K,V> input, Emitter<R> emitter) Processes the records from a PCollection.

Methods inherited from class org.apache.crunch.DoFn

cleanup, configure, disableDeepCopy, initialize, scaleFactor, setConfiguration, setContext

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.spark.api.java.function.FlatMapFunction2

call

Constructor Detail

SFlatMapFunction2

public SFlatMapFunction2()

Method Detail

process

public void process(Pair<K,V> input,
                    Emitter<R> emitter)

Description copied from class: DoFn

Processes the records from a PCollection.

Note: Crunch can reuse a single input record object whose content changes on each DoFn.process(Object, Emitter) method call. This functionality is imposed by Hadoop's Reducer implementation: The framework will reuse the key and value objects that are passed into the reduce, therefore the application should clone the objects they want to keep a copy of.

Specified by:

process in class DoFn<Pair<K,V>,R>

Parameters:

input - The input record.

emitter - The emitter to send the output to