org.apache.hadoop.mapred

接口 InputSplit

所有超级接口:

Writable

所有已知实现类:

CombineFileSplit, CompositeInputSplit, DBInputFormat.DBInputSplit, FileSplit, MultiFileSplit, SleepJob.EmptySplit

public interface InputSplit
extends Writable

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

方法概要

方法

限定符和类型	方法和说明
long	getLength() Get the total number of bytes in the data of the InputSplit.
String[]	getLocations() Get the list of hostnames where the input split is located.

从接口继承的方法 org.apache.hadoop.io.Writable

readFields, write

方法详细资料

getLength

long getLength()
               throws IOException

Get the total number of bytes in the data of the InputSplit.

返回:

the number of bytes in the input split.

抛出:

IOException

getLocations

String[] getLocations()
                      throws IOException

Get the list of hostnames where the input split is located.

返回:

list of hostnames where data of the InputSplit is located as an array of Strings.

抛出:

IOException