org.apache.hadoop.mapred

类 MultiFileInputFormat<K,V>

java.lang.Object

org.apache.hadoop.mapred.FileInputFormat<K,V>

org.apache.hadoop.mapred.MultiFileInputFormat<K,V>

所有已实现的接口:

InputFormat<K,V>

直接已知子类:

MultiFileWordCount.MyInputFormat

已过时。

Use CombineFileInputFormat instead

@Deprecated
public abstract class MultiFileInputFormat<K,V>
extends FileInputFormat<K,V>

An abstract InputFormat that returns MultiFileSplit's in getSplits(JobConf, int) method. Splits are constructed from the files under the input paths. Each split returned contains nearly equal content length.
Subclasses implement getRecordReader(InputSplit, JobConf, Reporter) to construct RecordReader's for MultiFileSplit's.

另请参阅:

MultiFileSplit

嵌套类概要

从类继承的嵌套类/接口 org.apache.hadoop.mapred.FileInputFormat

FileInputFormat.Counter

字段概要

从类继承的字段 org.apache.hadoop.mapred.FileInputFormat

LOG

构造器概要

构造器

构造器和说明
MultiFileInputFormat() 已过时。

方法概要

方法

限定符和类型	方法和说明
abstract RecordReader<K,V>	getRecordReader(InputSplit split, JobConf job, Reporter reporter) 已过时。 Get the RecordReader for the given InputSplit.
InputSplit[]	getSplits(JobConf job, int numSplits) 已过时。 Splits files returned by FileInputFormat.listStatus(JobConf) when they're too big.

从类继承的方法 org.apache.hadoop.mapred.FileInputFormat

addInputPath, addInputPaths, computeSplitSize, getBlockIndex, getInputPathFilter, getInputPaths, getSplitHosts, isSplitable, listStatus, setInputPathFilter, setInputPaths, setInputPaths, setMinSplitSize

从类继承的方法 java.lang.Object

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

构造器详细资料

MultiFileInputFormat

public MultiFileInputFormat()

已过时。

方法详细资料

getSplits

public InputSplit[] getSplits(JobConf job,
                     int numSplits)
                       throws IOException

已过时。

从类复制的说明: FileInputFormat

Splits files returned by FileInputFormat.listStatus(JobConf) when they're too big.

指定者:

getSplits 在接口中 InputFormat<K,V>

覆盖:

getSplits 在类中 FileInputFormat<K,V>

参数:

job - job configuration.

numSplits - the desired number of splits, a hint.

返回:

an array of InputSplits for the job.

抛出:

IOException

getRecordReader

public abstract RecordReader<K,V> getRecordReader(InputSplit split,
                                JobConf job,
                                Reporter reporter)
                                           throws IOException

已过时。

从接口复制的说明: InputFormat

Get the RecordReader for the given InputSplit.

It is the responsibility of the RecordReader to respect record boundaries while processing the logical split to present a record-oriented view to the individual task.

指定者:

getRecordReader 在接口中 InputFormat<K,V>

指定者:

getRecordReader 在类中 FileInputFormat<K,V>

参数:

split - the InputSplit

job - the job that this split belongs to

返回:

a RecordReader

抛出:

IOException