org.apache.derby.impl.store.raw.data
Class ChainAllocPageOperation

java.lang.Object
  extended by org.apache.derby.impl.store.raw.data.PageBasicOperation
      extended by org.apache.derby.impl.store.raw.data.PhysicalPageOperation
          extended by org.apache.derby.impl.store.raw.data.ChainAllocPageOperation
All Implemented Interfaces:
java.io.Externalizable, java.io.Serializable, Formatable, TypedFormat, Loggable, RePreparable, Undoable

public final class ChainAllocPageOperation
extends PhysicalPageOperation

See Also:
Serialized Form

Field Summary
protected  long newAllocPageNum
           
protected  long newAllocPageOffset
           
 
Fields inherited from class org.apache.derby.impl.store.raw.data.PageBasicOperation
containerHdl, foundHere, page
 
Fields inherited from interface org.apache.derby.iapi.store.raw.Loggable
ABORT, BI_LOG, CHECKSUM, COMMIT, COMPENSATION, FILE_RESOURCE, FIRST, LAST, PREPARE, RAWSTORE, XA_NEEDLOCK
 
Constructor Summary
ChainAllocPageOperation()
           
ChainAllocPageOperation(AllocPage allocPage, long pageNumber, long pageOffset)
           
 
Method Summary
 void doMe(Transaction tran, LogInstant instant, LimitObjectInput in)
          Link the next alloc page into the page chain
 int getTypeFormatId()
          Return my format identifier.
 void readExternal(java.io.ObjectInput in)
           
 void restoreMe(Transaction xact, BasePage undoPage, LogInstant CLRinstant, LimitObjectInput in)
          Undo the change indicated by this log operation and optional data.
 java.lang.String toString()
          debug
 void undoMe(Transaction xact, BasePage undoPage, LogInstant CLRInstant, LimitObjectInput in)
          Unlink the next alloc page from the page chain
 void writeExternal(java.io.ObjectOutput out)
           
 
Methods inherited from class org.apache.derby.impl.store.raw.data.PhysicalPageOperation
generateUndo
 
Methods inherited from class org.apache.derby.impl.store.raw.data.PageBasicOperation
findpage, getPage, getPageForRedoRecovery, getPageId, getPageVersion, getPreparedLog, group, needsRedo, reclaimPrepareLocks, releaseResource, resetPageNumber
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface org.apache.derby.iapi.store.raw.Loggable
getPreparedLog, group, needsRedo, releaseResource
 

Field Detail

newAllocPageNum

protected long newAllocPageNum

newAllocPageOffset

protected long newAllocPageOffset
Constructor Detail

ChainAllocPageOperation

public ChainAllocPageOperation(AllocPage allocPage,
                               long pageNumber,
                               long pageOffset)
                        throws StandardException
Throws:
StandardException

ChainAllocPageOperation

public ChainAllocPageOperation()
Method Detail

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException
Specified by:
writeExternal in interface java.io.Externalizable
Overrides:
writeExternal in class PageBasicOperation
Throws:
java.io.IOException

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException,
                         java.lang.ClassNotFoundException
Specified by:
readExternal in interface java.io.Externalizable
Overrides:
readExternal in class PageBasicOperation
Throws:
java.io.IOException - error reading from log stream
java.lang.ClassNotFoundException - cannot read object from input

getTypeFormatId

public int getTypeFormatId()
Return my format identifier.

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

doMe

public final void doMe(Transaction tran,
                       LogInstant instant,
                       LimitObjectInput in)
                throws StandardException
Link the next alloc page into the page chain

Parameters:
tran - the Transaction
instant - the log instant of this operation
in - optional data
Throws:
StandardException - container Handle is not active

undoMe

public void undoMe(Transaction xact,
                   BasePage undoPage,
                   LogInstant CLRInstant,
                   LimitObjectInput in)
            throws StandardException
Unlink the next alloc page from the page chain

Specified by:
undoMe in class PhysicalPageOperation
Parameters:
xact - the Transaction doing the rollback
undoPage - the page to rollback changes on
CLRInstant - the log instant of this (PageUndo) operation
in - optional data for the rollback operation
Throws:
StandardException - Thrown by methods I call
See Also:
PhysicalPageOperation.undoMe(org.apache.derby.iapi.store.raw.Transaction, org.apache.derby.impl.store.raw.data.BasePage, org.apache.derby.iapi.store.raw.log.LogInstant, org.apache.derby.iapi.services.io.LimitObjectInput)

restoreMe

public void restoreMe(Transaction xact,
                      BasePage undoPage,
                      LogInstant CLRinstant,
                      LimitObjectInput in)
Description copied from class: PageBasicOperation
Undo the change indicated by this log operation and optional data. The page the undo should apply to is the latched undoPage. The undoPage must be the same page as the doMe page and the undo operation must restore the before image of the row that changed.
this can only be used under special circumstances: namely table level locking, and no internal or nested transaction, and all operations are rollec back with restoreMe instead of undoMe.
This method is here to support BeforeImageLogging

Specified by:
restoreMe in class PageBasicOperation
Parameters:
xact - the Transaction doing the rollback
undoPage - the page to rollback changes on
CLRinstant - the log instant of this (PageUndo) operation
in - optional data for the rollback operation

toString

public java.lang.String toString()
debug

Overrides:
toString in class PageBasicOperation

Built on Thu 2012-03-29 21:53:33+0000, from revision ???

Apache Derby V10.6 Internals - Copyright © 2004,2007 The Apache Software Foundation. All Rights Reserved.