de.laures.cewolf.storage
Class LongTermSessionStorage

java.lang.Object
  de.laures.cewolf.storage.LongTermSessionStorage

All Implemented Interfaces:

Storage, java.io.Serializable

public class LongTermSessionStorage
extends java.lang.Object
implements Storage

Storage stores images in session, but expires them after a certain time. This expiration time defaults to 300 seconds, and can be changed by adding the timeout="xxx" parameter to and tags.

Author:

brianf

See Also:

Serialized Form

Constructor Summary

LongTermSessionStorage()

Method Summary

ChartImage	getChartImage(java.lang.String id, javax.servlet.http.HttpServletRequest request) Retrieves a chart image.
java.lang.String	getKey(ChartImage cid)
void	init(javax.servlet.ServletContext servletContext) Method init.
java.lang.String	removeChartImage(java.lang.String cid, javax.servlet.http.HttpServletRequest request) Removes the image from the storage
java.lang.String	storeChartImage(ChartImage chartImage, javax.servlet.jsp.PageContext pageContext) Stores a chart image.

Methods inherited from class java.lang.Object

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

Constructor Detail

LongTermSessionStorage

public LongTermSessionStorage()

Method Detail

getKey

public final java.lang.String getKey(ChartImage cid)

storeChartImage

public java.lang.String storeChartImage(ChartImage chartImage,
                                        javax.servlet.jsp.PageContext pageContext)
                                 throws CewolfException

Description copied from interface: Storage

Stores a chart image.

Specified by:

storeChartImage in interface Storage

Parameters:

chartImage - the image to be stored

pageContext - servletContext which might be needed

Returns:

String the storage id which is used to find the image in storage

Throws:

CewolfException

getChartImage

public ChartImage getChartImage(java.lang.String id,
                                javax.servlet.http.HttpServletRequest request)

Description copied from interface: Storage

Retrieves a chart image.

Specified by:

getChartImage in interface Storage

Parameters:

id - the id of the image

request - the request

Returns:

ChartImage the stored image instance

init

public void init(javax.servlet.ServletContext servletContext)
          throws CewolfException

Description copied from interface: Storage

Method init.

Specified by:

init in interface Storage

Throws:

CewolfException

removeChartImage

public java.lang.String removeChartImage(java.lang.String cid,
                                         javax.servlet.http.HttpServletRequest request)
                                  throws CewolfException

Description copied from interface: Storage

Removes the image from the storage

Specified by:

removeChartImage in interface Storage

Parameters:

cid - Image id

request - Servlet request

Returns:

Image id

Throws:

CewolfException

See Also:

Storage.removeChartImage(java.lang.String, javax.servlet.http.HttpServletRequest)