de.laures.cewolf
Class CewolfRenderer
java.lang.Object
javax.servlet.GenericServlet
javax.servlet.http.HttpServlet
de.laures.cewolf.CewolfRenderer
- All Implemented Interfaces:
- CewolfRendererMBean, java.io.Serializable, javax.servlet.Servlet, javax.servlet.ServletConfig
public class CewolfRenderer
- extends javax.servlet.http.HttpServlet
- implements CewolfRendererMBean
The rendering servlet of Cewolf. It is resposible for writing an entire chart
img into the response stream of the client. Everything needed for this is
prepared already by the ChartImgTag resp. LegendTag. The ID of a chart image
is passed to this servlet as a request parameter. After that the image object
is retrieved from the server side session based image cache. This servlet
must be configured in web.xml of the web application in order to use Cewolf
services. The servlet's URL relative to the web apps root is used as the
renderer attribute of the ChartImgTag resp. LegendTag in the JSP page.
- Author:
- Guido Laures
- See Also:
ChartImgTag
,
LegendTag
,
Serialized Form
Methods inherited from class javax.servlet.http.HttpServlet |
doDelete, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service |
Methods inherited from class javax.servlet.GenericServlet |
getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, log, log |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
INIT_CONFIG
public static final java.lang.String INIT_CONFIG
- See Also:
- Constant Field Values
WEB_ROOT_DIR
public static final java.lang.String WEB_ROOT_DIR
- See Also:
- Constant Field Values
CewolfRenderer
public CewolfRenderer()
init
public void init(javax.servlet.ServletConfig servletCfg)
throws javax.servlet.ServletException
- Specified by:
init
in interface javax.servlet.Servlet
- Overrides:
init
in class javax.servlet.GenericServlet
- Throws:
javax.servlet.ServletException
destroy
public void destroy()
- Specified by:
destroy
in interface javax.servlet.Servlet
- Overrides:
destroy
in class javax.servlet.GenericServlet
printParameters
public void printParameters(javax.servlet.http.HttpServletRequest request)
doGet
protected void doGet(javax.servlet.http.HttpServletRequest request,
javax.servlet.http.HttpServletResponse response)
throws javax.servlet.ServletException,
java.io.IOException
- Processes HTTP
GET
request. Renders the chart or the lengend into the client's response stream.
- Overrides:
doGet
in class javax.servlet.http.HttpServlet
- Parameters:
request
- servlet request
- Throws:
javax.servlet.ServletException
- when the production of data could not be handled by the configured DatasetProcuder
java.io.IOException
cppUsed
public static void cppUsed(ChartPostProcessor cpp)
chartUsed
public static void chartUsed(java.lang.String type)
getStartup
public java.util.Date getStartup()
- Specified by:
getStartup
in interface CewolfRendererMBean
getNumberChartsRendered
public int getNumberChartsRendered()
- Specified by:
getNumberChartsRendered
in interface CewolfRendererMBean
getNumberChartPostProcessorsUsed
public int getNumberChartPostProcessorsUsed()
- Specified by:
getNumberChartPostProcessorsUsed
in interface CewolfRendererMBean
getCppUsageDetails
public java.util.Map<java.lang.String,java.lang.Integer> getCppUsageDetails()
- Specified by:
getCppUsageDetails
in interface CewolfRendererMBean
getChartUsageDetails
public java.util.Map<java.lang.String,java.lang.Integer> getChartUsageDetails()
- Specified by:
getChartUsageDetails
in interface CewolfRendererMBean
getDebug
public boolean getDebug()
- Specified by:
getDebug
in interface CewolfRendererMBean
setDebug
public void setDebug(boolean debugged)
- Specified by:
setDebug
in interface CewolfRendererMBean
getRenderingEnabled
public boolean getRenderingEnabled()
- Specified by:
getRenderingEnabled
in interface CewolfRendererMBean
setRenderingEnabled
public void setRenderingEnabled(boolean renderingEnabled)
- Specified by:
setRenderingEnabled
in interface CewolfRendererMBean
cewolf tag library - web charts with JFreeChart