de.laures.cewolf
Interface Storage

All Superinterfaces:

java.io.Serializable

All Known Implementing Classes:

AbstractSessionStorage, ClusterableSessionStorage, FileStorage, LongTermSessionStorage, TransientSessionStorage

public interface Storage
extends java.io.Serializable

Pluggable storage. Implement this class to change the storage concept which Cewolf uses to store chart imanges and provide the implementation class name as init parameter storage for Cewolf servlet.

Author:

glaures

Method Summary

ChartImage	getChartImage(java.lang.String id, javax.servlet.http.HttpServletRequest request) Retrieves a chart image.
void	init(javax.servlet.ServletContext servletContext) Method init.
java.lang.String	removeChartImage(java.lang.String imgId, 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.

Method Detail

storeChartImage

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

Stores a chart image.

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

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

Retrieves a chart image.

Parameters:

id - the id of the image

request - the request

Returns:

ChartImage the stored image instance

init

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

Method init.

Parameters:

servletContext -

Throws:

CewolfException

removeChartImage

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

Removes the image from the storage

Parameters:

imgId - Image id

request - Servlet request

Returns:

Image id

Throws:

CewolfException