de.laures.cewolf
Interface Storage

All Known Implementing Classes:

AbstractSessionStorage, FileStorage, LongTermSessionStorage

public interface Storage

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 paramter 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

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

Stores a chart image.

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)

Retrieves a chart image.

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

Method init.

Parameters:

servletContext -

Throws:

CewolfException

removeChartImage

public 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