Class CompressSpacePageOperation10_2

java.lang.Object

org.apache.derby.impl.store.raw.data.PageBasicOperation

org.apache.derby.impl.store.raw.data.PhysicalPageOperation

org.apache.derby.impl.store.raw.data.CompressSpacePageOperation

org.apache.derby.impl.store.raw.data.CompressSpacePageOperation10_2

All Implemented Interfaces:

Externalizable, Serializable, Formatable, TypedFormat, Loggable, RePreparable, Undoable

public final class CompressSpacePageOperation10_2
extends CompressSpacePageOperation

This class overrides the CompressSpacePageOperation class to write CompressSpaceOperation Log Records that do not support negative values for new_highest_page. No other changes are added to the superclass behavior. This class ensures backward compatibility for Soft upgrades.

See Also:

• Serialized Form

Field Summary

Fields inherited from class CompressSpacePageOperation

newHighestPage, num_pages_truncated

Fields inherited from class PageBasicOperation

containerHdl, foundHere, page

Fields inherited from interface Loggable

ABORT, BI_LOG, CHECKSUM, COMMIT, COMPENSATION, FILE_RESOURCE, FIRST, LAST, PREPARE, RAWSTORE, XA_NEEDLOCK

Constructor Summary

Constructors

Constructor	Description
CompressSpacePageOperation10_2()
CompressSpacePageOperation10_2(AllocPage allocPage, int highest_page, int num_truncated)	Constructors for This class:

Method Summary

Modifier and Type	Method	Description
int	getTypeFormatId()	Return my format identifier.
void	readExternal(ObjectInput in)
void	writeExternal(ObjectOutput out)	Public Methods of Formatable interface.

Methods inherited from class CompressSpacePageOperation

doMe, restoreMe, toString, undoMe

Methods inherited from class PhysicalPageOperation

generateUndo

Methods inherited from class PageBasicOperation

findpage, getPage, getPageForRedoRecovery, getPageId, getPageVersion, getPreparedLog, group, needsRedo, reclaimPrepareLocks, releaseResource, resetPageNumber

Methods inherited from class Object

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

Methods inherited from interface Loggable

getPreparedLog, group, needsRedo, releaseResource

Constructor Details

CompressSpacePageOperation10_2

CompressSpacePageOperation10_2(AllocPage allocPage,
 int highest_page,
 int num_truncated)
                        throws StandardException

Constructors for This class:

Throws:

StandardException

CompressSpacePageOperation10_2

public CompressSpacePageOperation10_2()

Method Details

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Public Methods of Formatable interface.

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class CompressSpacePageOperation

Throws:

IOException

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class CompressSpacePageOperation

Throws:

IOException - error reading from log stream

ClassNotFoundException - cannot read object from input

getTypeFormatId

public int getTypeFormatId()

Return my format identifier.

Specified by:

getTypeFormatId in interface TypedFormat

Overrides:

getTypeFormatId in class CompressSpacePageOperation

Returns:

The identifier. (A UUID stuffed in an array of 16 bytes).