org.apache.hadoop.mapreduce.lib.input

クラス MultipleInputs

java.lang.Object

org.apache.hadoop.mapreduce.lib.input.MultipleInputs

@InterfaceAudience.Public
 @InterfaceStability.Stable
public class MultipleInputs
extends Object

This class supports MapReduce jobs that have multiple input paths with a different InputFormat and Mapper for each path

フィールドのサマリー

フィールド

修飾子とタイプ	フィールドと説明
static String	DIR_FORMATS
static String	DIR_MAPPERS

コンストラクタのサマリー

コンストラクタ

コンストラクタと説明
MultipleInputs()

メソッドのサマリー

修飾子とタイプ	メソッドと説明
static void	addInputPath(Job job, Path path, Class<? extends InputFormat> inputFormatClass) Add a Path with a custom InputFormat to the list of inputs for the map-reduce job.
static void	addInputPath(Job job, Path path, Class<? extends InputFormat> inputFormatClass, Class<? extends Mapper> mapperClass) Add a Path with a custom InputFormat and Mapper to the list of inputs for the map-reduce job.

クラスから継承されたメソッド java.lang.Object

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

フィールドの詳細

DIR_FORMATS

public static final String DIR_FORMATS

関連項目:

定数フィールド値

DIR_MAPPERS

public static final String DIR_MAPPERS

関連項目:

定数フィールド値

コンストラクタの詳細

MultipleInputs

public MultipleInputs()

メソッドの詳細

addInputPath

public static void addInputPath(Job job,
                                Path path,
                                Class<? extends InputFormat> inputFormatClass)

Add a Path with a custom InputFormat to the list of inputs for the map-reduce job.

パラメータ:

job - The Job

path - Path to be added to the list of inputs for the job

inputFormatClass - InputFormat class to use for this path

addInputPath

public static void addInputPath(Job job,
                                Path path,
                                Class<? extends InputFormat> inputFormatClass,
                                Class<? extends Mapper> mapperClass)

Add a Path with a custom InputFormat and Mapper to the list of inputs for the map-reduce job.

パラメータ:

job - The Job

path - Path to be added to the list of inputs for the job

inputFormatClass - InputFormat class to use for this path

mapperClass - Mapper class to use for this path