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

java.lang.Object
  extended by 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


Copyright © 2009 The Apache Software Foundation