org.exist.storage.dom
Class RemoveEmptyPageLoggable

java.lang.Object
  org.exist.storage.journal.AbstractLoggable
      org.exist.storage.dom.RemoveEmptyPageLoggable

All Implemented Interfaces:

Loggable

public class RemoveEmptyPageLoggable

extends AbstractLoggable

Author:

wolf

Field Summary

protected long	nextPage
protected long	pageNum
protected long	prevPage

Fields inherited from class org.exist.storage.journal.AbstractLoggable

lsn, transactId, type

Constructor Summary

RemoveEmptyPageLoggable(DBBroker broker, long transactionId)

RemoveEmptyPageLoggable(Txn transaction, long pageNum, long prevPage, long nextPage)

Method Summary

java.lang.String	dump() Default implementation returns the current LSN plus the class name of the Loggable instance.
int	getLogSize() Returns the size of the work load of this entry.
void	read(java.nio.ByteBuffer in) Read the entry.
void	redo() Redo the underlying operation.
void	undo() Undo, i.e.
void	write(java.nio.ByteBuffer out) Write this entry to the specified ByteBuffer.

Methods inherited from class org.exist.storage.journal.AbstractLoggable

clear, getLogType, getLsn, getTransactionId, setLsn

Methods inherited from class java.lang.Object

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

Field Detail

pageNum

protected long pageNum

prevPage

protected long prevPage

nextPage

protected long nextPage

Constructor Detail

RemoveEmptyPageLoggable

public RemoveEmptyPageLoggable(Txn transaction,
                               long pageNum,
                               long prevPage,
                               long nextPage)

RemoveEmptyPageLoggable

public RemoveEmptyPageLoggable(DBBroker broker,
                               long transactionId)

Method Detail

write

public void write(java.nio.ByteBuffer out)

Description copied from interface: Loggable

Write this entry to the specified ByteBuffer.

Parameters:

out -

read

public void read(java.nio.ByteBuffer in)

Description copied from interface: Loggable

Read the entry.

Parameters:

in -

getLogSize

public int getLogSize()

Description copied from interface: Loggable

Returns the size of the work load of this entry.

Returns:

redo

public void redo()
          throws LogException

Description copied from interface: Loggable

Redo the underlying operation. This method is called by RecoveryManager.

Specified by:

redo in interface Loggable

Overrides:

redo in class AbstractLoggable

Throws:

LogException

undo

public void undo()
          throws LogException

Description copied from interface: Loggable

Undo, i.e. roll back, the underlying operation. The method is called by RecoveryManager.

Specified by:

undo in interface Loggable

Overrides:

undo in class AbstractLoggable

Throws:

LogException

dump

public java.lang.String dump()

Description copied from class: AbstractLoggable

Default implementation returns the current LSN plus the class name of the Loggable instance.

Specified by:

dump in interface Loggable

Overrides:

dump in class AbstractLoggable