org.apache.hadoop.mapreduce

类 InputSplit

java.lang.Object

org.apache.hadoop.mapreduce.InputSplit

直接已知子类:

CombineFileSplit, DBInputFormat.DBInputSplit, FileSplit, FileSplit

public abstract class InputSplit
extends Object

InputSplit represents the data to be processed by an individual Mapper.

Typically, it presents a byte-oriented view on the input and is the responsibility of RecordReader of the job to process this and present a record-oriented view.

另请参阅:

InputFormat, RecordReader

构造器概要

构造器

构造器和说明
InputSplit()

方法概要

方法

限定符和类型	方法和说明
abstract long	getLength() Get the size of the split, so that the input splits can be sorted by size.
abstract String[]	getLocations() Get the list of nodes by name where the data for the split would be local.

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

InputSplit

public InputSplit()

方法详细资料

getLength

public abstract long getLength()
                        throws IOException,
                               InterruptedException

Get the size of the split, so that the input splits can be sorted by size.

返回:

the number of bytes in the split

抛出:

IOException

InterruptedException

getLocations

public abstract String[] getLocations()
                               throws IOException,
                                      InterruptedException

Get the list of nodes by name where the data for the split would be local. The locations do not need to be serialized.

返回:

a new array of the node nodes.

抛出:

IOException

InterruptedException