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

java.lang.Object
  org.apache.hadoop.mapreduce.split.JobSplit.SplitMetaInfo

All Implemented Interfaces:

Writable

Enclosing class:

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

Constructor Summary

JobSplit.SplitMetaInfo()

JobSplit.SplitMetaInfo(InputSplit split, long startOffset)

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

Method Summary

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.

Methods inherited from class java.lang.Object

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

Constructor Detail

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

Throws:

IOException

Method Detail

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

Description copied from interface: Writable

Deserialize the fields of this object from in.

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

Specified by:

readFields in interface Writable

Parameters:

in - DataInput to deseriablize this object from.

Throws:

IOException

write

public void write(DataOutput out)
           throws IOException

Description copied from interface: Writable

Serialize the fields of this object to out.

Specified by:

write in interface Writable

Parameters:

out - DataOuput to serialize this object into.

Throws:

IOException

toString

public String toString()

Overrides:

toString in class Object