Package org.apache.wicket.pageStore.disk

Class PageWindowManager

java.lang.Object

org.apache.wicket.pageStore.disk.PageWindowManager

All Implemented Interfaces:

Serializable

public class PageWindowManager
extends Object
implements Serializable

Manages positions and size of chunks of data in a file.

The data is stored inside the file in a cyclic way. Newer pages are placed after older ones, until the maximum file size is reached. After that, the next page is stored in the beginning of the file.

Author:

Matej Knopp

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PageWindowManager.FileWindow	Contains information about a page inside the file.

Constructor Summary

Constructors

Constructor	Description
PageWindowManager(long maxSize)	Creates a new PageWindowManager.

Method Summary

Modifier and Type	Method	Description
PageWindowManager.FileWindow	createPageWindow(int pageId, String pageType, int size)	Creates and returns a new page window for given page.
List<PageWindowManager.FileWindow>	getFileWindows()	Returns last n saved page windows.
PageWindowManager.FileWindow	getPageWindow(int pageId)	Returns the page window for given page or null if no window was found.
int	getTotalSize()	Returns the size of all saved pages
void	removePage(int pageId)	Removes the page window for given page.

Methods inherited from class java.lang.Object

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

Constructor Details

PageWindowManager

public PageWindowManager(long maxSize)

Creates a new PageWindowManager.

Parameters:

maxSize - maximum page size. After this size is exceeded, the pages will be saved starting at the beginning of file

Method Details

createPageWindow

public PageWindowManager.FileWindow createPageWindow(int pageId,
 String pageType,
 int size)

Creates and returns a new page window for given page.

Parameters:

pageId -

pageType -

size -

Returns:

page window

getPageWindow

public PageWindowManager.FileWindow getPageWindow(int pageId)

Returns the page window for given page or null if no window was found.

Parameters:

pageId -

Returns:

page window or null

removePage

public void removePage(int pageId)

Removes the page window for given page.

Parameters:

pageId -

getFileWindows

public List<PageWindowManager.FileWindow> getFileWindows()

Returns last n saved page windows.

Returns:

list of page windows

getTotalSize

public int getTotalSize()

Returns the size of all saved pages

Returns:

total size