Package com.mckoi.store

Class JournalledSystem.JournalEntry

java.lang.Object

com.mckoi.store.JournalledSystem.JournalEntry

Enclosing class:

JournalledSystem

private static final class JournalledSystem.JournalEntry
extends java.lang.Object

A JournalEntry represents a modification that has been logging in the journal for a specific page of a resource. It contains the name of the log file, the position in the journal of the modification, and the page number.

Field Summary

Fields

Modifier and Type	Field	Description
private JournalledSystem.JournalFile	journal	The journal file.
(package private) JournalledSystem.JournalEntry	next_page	The next journal entry with the same page number
private long	page_number	The page number of this modification.
private long	position	The position in the journal file.
private java.lang.String	resource_name	The resource that this page is on.

Constructor Summary

Constructors

Constructor	Description
JournalEntry(java.lang.String resource_name, JournalledSystem.JournalFile journal, long position, long page_number)	Constructs the entry.

Method Summary

Modifier and Type	Method	Description
JournalledSystem.JournalFile	getJournalFile()	Returns the journal file for this entry.
long	getPageNumber()	Returns the page number of this modification log entry.
long	getPosition()	Returns the position of the log entry in the journal file.

Methods inherited from class java.lang.Object

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

Field Detail

resource_name

private final java.lang.String resource_name

The resource that this page is on.

journal

private final JournalledSystem.JournalFile journal

The journal file.

position

private final long position

The position in the journal file.

page_number

private final long page_number

The page number of this modification.

next_page

JournalledSystem.JournalEntry next_page

The next journal entry with the same page number

Constructor Detail

JournalEntry

public JournalEntry(java.lang.String resource_name,
                    JournalledSystem.JournalFile journal,
                    long position,
                    long page_number)

Constructs the entry.

Method Detail

getJournalFile

public JournalledSystem.JournalFile getJournalFile()

Returns the journal file for this entry.

getPosition

public long getPosition()

Returns the position of the log entry in the journal file.

getPageNumber

public long getPageNumber()

Returns the page number of this modification log entry.