org.gridgain.grid.ggfs.mapreduce.records

Class GridGgfsFixedLengthRecordResolver

java.lang.Object

org.gridgain.grid.ggfs.mapreduce.records.GridGgfsFixedLengthRecordResolver

All Implemented Interfaces:

Externalizable, Serializable, GridGgfsRecordResolver

public class GridGgfsFixedLengthRecordResolver
extends Object
implements GridGgfsRecordResolver, Externalizable

Record resolver which adjusts records to fixed length. That is, start offset of the record is shifted to the nearest position so that newStart % length == 0.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
GridGgfsFixedLengthRecordResolver() Empty constructor required for Externalizable support.
GridGgfsFixedLengthRecordResolver(long recLen) Creates fixed-length record resolver.

Method Summary

Methods

Modifier and Type	Method and Description
void	readExternal(ObjectInput in)
GridGgfsFileRange	resolveRecords(GridGgfs ggfs, GridGgfsInputStream stream, GridGgfsFileRange suggestedRecord) Adjusts record start offset and length.
String	toString()
void	writeExternal(ObjectOutput out)

Methods inherited from class java.lang.Object

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

Constructor Detail

GridGgfsFixedLengthRecordResolver

public GridGgfsFixedLengthRecordResolver()

Empty constructor required for Externalizable support.

GridGgfsFixedLengthRecordResolver

public GridGgfsFixedLengthRecordResolver(long recLen)

Creates fixed-length record resolver.

Parameters:

recLen - Record length.

Method Detail

resolveRecords

public GridGgfsFileRange resolveRecords(GridGgfs ggfs,
                               GridGgfsInputStream stream,
                               GridGgfsFileRange suggestedRecord)
                                 throws GridException,
                                        IOException

Adjusts record start offset and length.

Specified by:

resolveRecords in interface GridGgfsRecordResolver

Parameters:

ggfs - GGFS instance to use.

stream - Input stream for split file.

suggestedRecord - Suggested file system record.

Returns:

New adjusted record. If this method returns null, original record is ignored.

Throws:

GridException - If resolve failed.

IOException - If resolve failed.

toString

public String toString()

Overrides:

toString in class Object

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException