org.apache.hadoop.mapreduce.split

类 JobSplit.SplitMetaInfo

java.lang.Object

org.apache.hadoop.mapreduce.split.JobSplit.SplitMetaInfo

所有已实现的接口:

Writable

封闭类:

JobSplit

public static class JobSplit.SplitMetaInfo
extends Object
implements Writable

This represents the meta information about the task split. The main fields are - start offset in actual split - data length that will be processed in this split - hosts on which this split is local

构造器概要

构造器

构造器和说明
JobSplit.SplitMetaInfo()
JobSplit.SplitMetaInfo(InputSplit split, long startOffset)
JobSplit.SplitMetaInfo(String[] locations, long startOffset, long inputDataLength)

方法概要

方法

限定符和类型	方法和说明
long	getInputDataLength()
String[]	getLocations()
long	getStartOffset()
void	readFields(DataInput in) Deserialize the fields of this object from in.
void	setInputDataLength(long length)
void	setInputDataLocations(String[] locations)
String	toString()
void	write(DataOutput out) Serialize the fields of this object to out.

从类继承的方法 java.lang.Object

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

构造器详细资料

JobSplit.SplitMetaInfo

public JobSplit.SplitMetaInfo()

JobSplit.SplitMetaInfo

public JobSplit.SplitMetaInfo(String[] locations,
                      long startOffset,
                      long inputDataLength)

JobSplit.SplitMetaInfo

public JobSplit.SplitMetaInfo(InputSplit split,
                      long startOffset)
                       throws IOException

抛出:

IOException

方法详细资料

getLocations

public String[] getLocations()

getStartOffset

public long getStartOffset()

getInputDataLength

public long getInputDataLength()

setInputDataLocations

public void setInputDataLocations(String[] locations)

setInputDataLength

public void setInputDataLength(long length)

readFields

public void readFields(DataInput in)
                throws IOException

从接口复制的说明: Writable

Deserialize the fields of this object from in.

For efficiency, implementations should attempt to re-use storage in the existing object where possible.

指定者:

readFields 在接口中 Writable

参数:

in - DataInput to deseriablize this object from.

抛出:

IOException

write

public void write(DataOutput out)
           throws IOException

从接口复制的说明: Writable

Serialize the fields of this object to out.

指定者:

write 在接口中 Writable

参数:

out - DataOuput to serialize this object into.

抛出:

IOException

toString

public String toString()

覆盖:

toString 在类中 Object