org.apache.wicket.pageStore.memory

Class HttpSessionDataStore

java.lang.Object

org.apache.wicket.pageStore.memory.HttpSessionDataStore

All Implemented Interfaces:

IDataStore

public class HttpSessionDataStore
extends Object
implements IDataStore

A IDataStore which stores the pages in the HttpSession. Uses IDataStoreEvictionStrategy to keep the memory footprint reasonable.

Usage:

 
 MyApp#init()
 {

        setPageManagerProvider(new DefaultPageManagerProvider(this)
        {
                protected IDataStore newDataStore() 
                { 
                        return  new HttpSessionDataStore(pageManagerContext, new PageNumberEvictionStrategy(20));
                }
        }
 }
 
 

Constructor Summary

Constructors

Constructor and Description
HttpSessionDataStore(IPageManagerContext pageManagerContext, IDataStoreEvictionStrategy evictionStrategy) Construct.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	canBeAsynchronous()
void	destroy() Properly close the data store and possibly open resource handles
byte[]	getData(String sessionId, int pageId) Get data associated with the session id and page id.
boolean	isReplicated()
void	removeData(String sessionId) Remove all page data for the session id
void	removeData(String sessionId, int pageId) Remove all persisted data related to the session id and page id
void	storeData(String sessionId, int pageId, byte[] pageAsBytes) Store the page data

Methods inherited from class java.lang.Object

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

Constructor Detail

HttpSessionDataStore

public HttpSessionDataStore(IPageManagerContext pageManagerContext,
                    IDataStoreEvictionStrategy evictionStrategy)

Construct.

Parameters:

pageManagerContext -

evictionStrategy -

Method Detail

getData

public byte[] getData(String sessionId,
             int pageId)

Description copied from interface: IDataStore

Get data associated with the session id and page id.

Specified by:

getData in interface IDataStore

Parameters:

sessionId - Ignored. Only pages from the current http session can be read

pageId - Page ID

Returns:

All the page data persisted

See Also:

IDataStore.getData(java.lang.String, int)

removeData

public void removeData(String sessionId,
              int pageId)

Description copied from interface: IDataStore

Remove all persisted data related to the session id and page id

Specified by:

removeData in interface IDataStore

Parameters:

sessionId - Session ID

pageId - Page ID

removeData

public void removeData(String sessionId)

Description copied from interface: IDataStore

Remove all page data for the session id

Specified by:

removeData in interface IDataStore

Parameters:

sessionId - Session ID

storeData

public void storeData(String sessionId,
             int pageId,
             byte[] pageAsBytes)

Description copied from interface: IDataStore

Store the page data

Specified by:

storeData in interface IDataStore

Parameters:

sessionId - Session ID

pageId - Page ID

pageAsBytes - Page data

destroy

public void destroy()

Description copied from interface: IDataStore

Properly close the data store and possibly open resource handles

Specified by:

destroy in interface IDataStore

isReplicated

public boolean isReplicated()

Specified by:

isReplicated in interface IDataStore

Returns:

whether the data store is replicated

canBeAsynchronous

public final boolean canBeAsynchronous()

Specified by:

canBeAsynchronous in interface IDataStore

Returns:

whether the implementation can be wrapped in AsynchronousDataStore