org.apache.activeio.journal.active

Class ControlFile

java.lang.Object

org.apache.activeio.journal.active.ControlFile

public final class ControlFile
extends Object

Control file holds the last known good state of the journal. It stores the state in record that is versioned and repeated twice in the file so that a failure in the middle of the write of the first or second record do not not result in an unknown state.

Version:

$Revision: 1.1 $

Constructor Summary

Constructors

Constructor and Description
ControlFile(File fileName, int controlDataSize)

Method Summary

Modifier and Type	Method and Description
void	dispose()
Packet	getControlData()
boolean	load()
void	lock() Locks the control file.
void	store()
void	unlock() Un locks the control file.

Methods inherited from class java.lang.Object

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

Constructor Detail

ControlFile

public ControlFile(File fileName,
                   int controlDataSize)
            throws IOException

Throws:

IOException

Method Detail

lock

public void lock()
          throws IOException

Locks the control file.

Throws:

IOException

unlock

public void unlock()
            throws IOException

Un locks the control file.

Throws:

IOException

load

public boolean load()
             throws IOException

Throws:

IOException

store

public void store()
           throws IOException

Throws:

IOException

getControlData

public Packet getControlData()

dispose

public void dispose()