org.apache.wicket.pageStore

Class PageWindowManager

java.lang.Object

org.apache.wicket.pageStore.PageWindowManager

All Implemented Interfaces:

Serializable

public class PageWindowManager
extends Object
implements Serializable

Manages positions and size of serialized pages in the pagemap file.

The pages are 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 and Description
static class	PageWindowManager.PageWindow Public (read only) version of page window.

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
PageWindowManager.PageWindow	createPageWindow(int pageId, int size) Creates and returns a new page window for given page.
List<PageWindowManager.PageWindow>	getLastPageWindows(int count) Returns last n saved page windows.
PageWindowManager.PageWindow	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 Detail

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 Detail

createPageWindow

public PageWindowManager.PageWindow createPageWindow(int pageId,
                                                     int size)

Creates and returns a new page window for given page.

Parameters:

pageId -

size -

Returns:

page window

getPageWindow

public PageWindowManager.PageWindow 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 -

getLastPageWindows

public List<PageWindowManager.PageWindow> getLastPageWindows(int count)

Returns last n saved page windows.

Parameters:

count -

Returns:

list of page windows

getTotalSize

public int getTotalSize()

Returns the size of all saved pages

Returns:

total size