com.bigdata.bfs

Class FileVersionDeleter

java.lang.Object

cutthecrap.utils.striterators.FilterBase

com.bigdata.btree.filter.TupleFilter<E>

com.bigdata.btree.filter.TupleUpdater<TPS.TPV>

com.bigdata.bfs.FileVersionDeleter

All Implemented Interfaces:

ITupleFilter<TPS.TPV>, IFilter, IPropertySet, Serializable, Cloneable

public class FileVersionDeleter
extends TupleUpdater<TPS.TPV>

A procedure that performs a key range scan, marking all non-deleted versions within the key range as deleted (by storing a null property value for the FileMetadataSchema.VERSION).

Version:

$Id$

Author:

Bryan Thompson

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.bigdata.btree.filter.TupleUpdater

TupleUpdater.Updaterator

Nested classes/interfaces inherited from class com.bigdata.btree.filter.TupleFilter

TupleFilter.TupleFilterator<E>

Constructor Summary

Constructors

Constructor and Description
FileVersionDeleter(long timestamp)

Method Summary

Methods

Modifier and Type	Method and Description
protected boolean	isValid(ITuple<TPS.TPV> tuple) Only visits the FileMetadataSchema.VERSION columns.
protected void	update(IIndex ndx, ITuple<TPS.TPV> tuple) Appends a new tuple into the index whose key uses the choosenTimestamp and whose value is an encoded null.

Methods inherited from class com.bigdata.btree.filter.TupleUpdater

filterOnce

Methods inherited from class cutthecrap.utils.striterators.FilterBase

addFilter, filter, getProperty, getRequiredProperty, setProperty, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface cutthecrap.utils.striterators.IFilter

filter

Methods inherited from interface cutthecrap.utils.striterators.IPropertySet

getProperty

Constructor Detail

FileVersionDeleter

public FileVersionDeleter(long timestamp)

Parameters:

timestamp - A valid timestamp or IRowStoreConstants.AUTO_TIMESTAMP or IRowStoreConstants.AUTO_TIMESTAMP_UNIQUE.

Method Detail

isValid

protected boolean isValid(ITuple<TPS.TPV> tuple)

Only visits the FileMetadataSchema.VERSION columns.

Specified by:

isValid in class TupleFilter<TPS.TPV>

update

protected void update(IIndex ndx,
          ITuple<TPS.TPV> tuple)

Appends a new tuple into the index whose key uses the choosenTimestamp and whose value is an encoded null. This is interepreted as a "deleted" file version tuple.

Note: The old tuple is not removed so you can continue to access the historical version explicitly.

Specified by:

update in class TupleUpdater<TPS.TPV>

Parameters:

ndx - The index on which the ITupleCursor is reading.

tuple - The tuple that is being visited.