Field Detail

• newPageNumber

  protected long newPageNumber

• doStatus

  protected int doStatus

• undoStatus

  protected int undoStatus

Constructor Detail

• AllocPageOperation

  AllocPageOperation​(AllocPage allocPage,
                     long pageNumber,
                     int doStatus,
                     int undoStatus)
              throws StandardException

  Throws:

  StandardException

• AllocPageOperation

  public AllocPageOperation()

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

  Allocate/deallocate/free this page number

  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

  Allocate/deallocate/free this page number.

  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