de.laures.cewolf.storage
Class FileStorage

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

All Implemented Interfaces:

Storage, java.io.Serializable

public class FileStorage
extends java.lang.Object
implements Storage

Storage for storing images as files in the web application directory as files _chart-XXXXX. Note that by default the files won't ever be removed. To remove saved images on VM exit set the FileStorage.deleteOnExit configuration parameter to "true". For example:

                
                        storage
                        de.laures.cewolf.storage.FileStorage
                
                
                                FileStorage.deleteOnExit
                                true
                 
        

Author:

guido

See Also:

Serialized Form

Constructor Summary

FileStorage()

Method Summary

boolean	contains(ChartImage chartImage, javax.servlet.jsp.PageContext pageContext) see de.laures.cewolf.Storage#contains(ChartImage, PageContext)
ChartImage	getChartImage(java.lang.String id, javax.servlet.http.HttpServletRequest request) Retrieves a chart image.
java.lang.String	getKey(ChartImage chartImage) see de.laures.cewolf.Storage#getKey(ChartImage)
void	init(javax.servlet.ServletContext servletContext) Method init.
java.lang.String	removeChartImage(java.lang.String imgKey, javax.servlet.http.HttpServletRequest pageContext) Removes the image from the storage
java.lang.String	storeChartImage(ChartImage cid, 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

FileStorage

public FileStorage()

Method Detail

storeChartImage

public java.lang.String storeChartImage(ChartImage cid,
                                        javax.servlet.jsp.PageContext pageContext)

Description copied from interface: Storage

Stores a chart image.

Specified by:

storeChartImage in interface Storage

Parameters:

cid - 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

See Also:

Storage.storeChartImage(ChartImage, PageContext)

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

See Also:

Storage.getChartImage(String, HttpServletRequest)

contains

public boolean contains(ChartImage chartImage,
                        javax.servlet.jsp.PageContext pageContext)

see de.laures.cewolf.Storage#contains(ChartImage, PageContext)

getKey

public java.lang.String getKey(ChartImage chartImage)

see de.laures.cewolf.Storage#getKey(ChartImage)

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

See Also:

Storage.init(ServletContext)

removeChartImage

public java.lang.String removeChartImage(java.lang.String imgKey,
                                         javax.servlet.http.HttpServletRequest pageContext)
                                  throws CewolfException

Description copied from interface: Storage

Removes the image from the storage

Specified by:

removeChartImage in interface Storage

Parameters:

imgKey - Image id

pageContext - Servlet request

Returns:

Image id

Throws:

CewolfException

See Also:

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