com.cloudera.crunch.lib
Class Sample.SamplerFn<S>

java.lang.Object
  com.cloudera.crunch.DoFn<S,S>
      com.cloudera.crunch.lib.Sample.SamplerFn<S>

All Implemented Interfaces:

Serializable

Enclosing class:

Sample

public static class Sample.SamplerFn<S>
extends DoFn<S,S>

See Also:

Serialized Form

Constructor Summary

Sample.SamplerFn(long seed, double acceptanceProbability)

Method Summary

void	initialize() Called during the setup of the MapReduce job this DoFn is associated with.
void	process(S input, Emitter<S> emitter) Processes the records from a PCollection.

Methods inherited from class com.cloudera.crunch.DoFn

cleanup, configure, getConfiguration, getCounter, getCounter, getStatus, getTaskAttemptID, progress, scaleFactor, setConfigurationForTest, setContext, setStatus

Methods inherited from class java.lang.Object

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

Constructor Detail

Sample.SamplerFn

public Sample.SamplerFn(long seed,
                        double acceptanceProbability)

Method Detail

initialize

public void initialize()

Description copied from class: DoFn

Called during the setup of the MapReduce job this DoFn is associated with. Subclasses may override this method to do appropriate initialization.

Overrides:

initialize in class DoFn<S,S>

process

public void process(S input,
                    Emitter<S> emitter)

Description copied from class: DoFn

Processes the records from a PCollection.

Specified by:

process in class DoFn<S,S>

Parameters:

input - The input record

emitter - The emitter to send the output to