com.google.appengine.tools.mapreduce.impl

Class GoogleCloudStorageSortInput

java.lang.Object

com.google.appengine.tools.mapreduce.Input<KeyValue<ByteBuffer,ByteBuffer>>

com.google.appengine.tools.mapreduce.impl.GoogleCloudStorageSortInput

All Implemented Interfaces:

Serializable

public class GoogleCloudStorageSortInput
extends Input<KeyValue<ByteBuffer,ByteBuffer>>

Defines the way the data is read in by the Sort phase. This consists of logically concatenating multiple GoogleCloudStorage files to form a single input of KeyValue pairs. The sorter does not care what the individual values are so they are not deserialized.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
GoogleCloudStorageSortInput(FilesByShard files)

Method Summary

Methods

Modifier and Type	Method and Description
List<? extends InputReader<KeyValue<ByteBuffer,ByteBuffer>>>	createReaders() Returns a list of readers for this input.

Methods inherited from class com.google.appengine.tools.mapreduce.Input

getContext

Methods inherited from class java.lang.Object

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

Constructor Detail

GoogleCloudStorageSortInput

public GoogleCloudStorageSortInput(FilesByShard files)

Method Detail

createReaders

public List<? extends InputReader<KeyValue<ByteBuffer,ByteBuffer>>> createReaders()

Description copied from class: Input

Returns a list of readers for this input. It is the Input's responsibility to determine an appropriate number of readers to split into. This could be specified by the user or determined algorithmically. The number of input readers returned determines the number of map shards.

Specified by:

createReaders in class Input<KeyValue<ByteBuffer,ByteBuffer>>