org.exist.storage.btree
Class UpdateValueLoggable

java.lang.Object
  org.exist.storage.journal.AbstractLoggable
      org.exist.storage.btree.BTAbstractLoggable
          org.exist.storage.btree.UpdateValueLoggable

All Implemented Interfaces:

Loggable

public class UpdateValueLoggable

extends BTAbstractLoggable

Author:

wolf

Field Summary

protected int	idx
protected Value	key
protected long	oldPointer
protected long	pageNum
protected long	pointer

Fields inherited from class org.exist.storage.btree.BTAbstractLoggable

broker, fileId

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

lsn, transactId, type

Constructor Summary

UpdateValueLoggable(DBBroker broker, long transactionId)

UpdateValueLoggable(Txn transaction, byte fileId, long pageNum, int idx, Value key, long pointer, long oldPointer)

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.btree.BTAbstractLoggable

getStorage

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

idx

protected int idx

key

protected Value key

pointer

protected long pointer

oldPointer

protected long oldPointer

Constructor Detail

UpdateValueLoggable

public UpdateValueLoggable(Txn transaction,
                           byte fileId,
                           long pageNum,
                           int idx,
                           Value key,
                           long pointer,
                           long oldPointer)

Parameters:

transaction -

UpdateValueLoggable

public UpdateValueLoggable(DBBroker broker,
                           long transactionId)

Parameters:

broker -

transactionId -

Method Detail

write

public void write(java.nio.ByteBuffer out)

Description copied from interface: Loggable

Write this entry to the specified ByteBuffer.

Specified by:

write in interface Loggable

Overrides:

write in class BTAbstractLoggable

read

public void read(java.nio.ByteBuffer in)

Description copied from interface: Loggable

Read the entry.

Specified by:

read in interface Loggable

Overrides:

read in class BTAbstractLoggable

getLogSize

public int getLogSize()

Description copied from interface: Loggable

Returns the size of the work load of this entry.

Specified by:

getLogSize in interface Loggable

Overrides:

getLogSize in class BTAbstractLoggable

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