Hi Prajesh, You should use 2.0 in the portlet descriptor if you want to use Portlet 2.0 features.
<portlet-app id="ScatterPlot" version="2.0"> -Woonsan --- On Tue, 8/24/10, Prajesh Bhattacharya <pbhattacha...@lbl.gov> wrote: > From: Prajesh Bhattacharya <pbhattacha...@lbl.gov> > Subject: Problem showing graphs in a portlet > To: jetspeed-user@portals.apache.org > Date: Tuesday, August 24, 2010, 12:51 AM > Hello All, > > I am very new to portlet development. I have no experience > with servlet development either. I am trying to show a graph > in a portlet. I am using JFreeChart library for charting. > > My portlet container is JetSpeed2 (2.2.1). As a test case, > first I tested my code with a line of text. It worked. Then > I tried to move on to graphics, but my graphics never showed > up in the portlet. I decided to test if my portlet could > show a static image stored on the disk. I did not have any > luck even with that. I have followed methodology/code > provided at > http://blogs.sun.com/satya/entry/new_feature_resource_serving_in > > Can someone please point out the problem here? If you need > more information, please let me know. I really appreciate > your help. > > Thanks. > Prajesh > > Following is my portlet code. Please note that I have > tested the line > ChartUtilities.writeChartAsJPEG(image_out, quality, > demo.chart, 400,300); > inside a stand-alone app in which image_out was a > FileOutputStream. > > ******************************************************** > import java.io.IOException; > import java.io.OutputStream; > import javax.portlet.GenericPortlet; > import javax.portlet.PortletException; > import javax.portlet.RenderRequest; > import javax.portlet.RenderResponse; > import javax.portlet.ResourceRequest; > import javax.portlet.ResourceResponse; > import javax.portlet.ResourceURL; > import java.io.PrintWriter; > > import org.jfree.chart.ChartUtilities; > // import org.jfree.ui.RefineryUtilities; > // import org.jfree.util.Log; > // import org.jfree.util.PrintStreamLogTarget; > > > public class ScatterPlot extends GenericPortlet { > > > public void doView(RenderRequest request, RenderResponse > response) > > throws > PortletException, IOException { > > // > Log.getInstance().addTarget(new PrintStreamLogTarget()); > > response.setContentType("text/html"); > PrintWriter writer = > response.getWriter(); > > ResourceURL resURL = > response.createResourceURL(); > resURL.setResourceID("image"); > writer.println("<IMG src=\"" + resURL > + "\" >"); > > } > > > > > public void serveResource(ResourceRequest resRequest, > ResourceResponse resResp) > > throws PortletException, IOException { > > resResp.setContentType("image/jpeg"); > OutputStream image_out = > resResp.getPortletOutputStream(); > > TimeSeriesDemo demo = new > TimeSeriesDemo("Time Series"); > float quality = (float)(0.75); > ChartUtilities.writeChartAsJPEG(image_out, > quality, demo.chart, 400,300); > image_out.flush(); > image_out.close(); > } > > } // end of class > ********************************************************************** > > > Following is my portlet.xml. > ********************************************************************* > <?xml version="1.0" encoding="UTF-8"?> > > <portlet-app id="ScatterPlot" version="1.0"> > > <portlet id="ScatterPlot_ID"> > <description>Plot as many variables > on the Y axis against the ONLY variable on the X > axis</description> > <portlet-name>ScatterPlot_Name</portlet-name> > <display-name>Scatter > Plot</display-name> > <portlet-class>ScatterPlot</portlet-class> > > <expiration-cache>-1</expiration-cache> > <supports> > > <mime-type>*/*</mime-type> > > <portlet-mode>VIEW</portlet-mode> > > <portlet-mode>HELP</portlet-mode> > > <portlet-mode>EDIT</portlet-mode> > <!-- support custom about > mode --> > > <portlet-mode>about</portlet-mode> > <!-- support custom > edit_defaults mode --> > > <portlet-mode>edit_defaults</portlet-mode> > <!-- support custom > preview mode --> > > <portlet-mode>preview</portlet-mode> > <!-- support custom print > mode --> > > <portlet-mode>print</portlet-mode> > </supports> > <supported-locale>en</supported-locale> > > <portlet-info> > <title>Scatter > Plot</title> > </portlet-info> > > </portlet> > > </portlet-app> > ********************************************************************* > > > Following is my web.xml. > ********************************************************************* > <?xml version="1.0" encoding="UTF-8"?> > > <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD > Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd";> > > > <web-app> > <display-name>ScatterPlot</display-name> > <description>Scatter Plot > Portlet</description> > > </web-app> > *********************************************************************** > -- / *Prajesh Bhattacharya, PhD | Lawrence Berkeley > National Laboratory | One Cyclotron Road, MS 90R3111, > Berkeley, CA 94720-8134 | 510-486-7857 (W) | 480-586-1387 > (M) | 510-486-4089 (Fax)* / > --------------------------------------------------------------------- To unsubscribe, e-mail: jetspeed-user-unsubscr...@portals.apache.org For additional commands, e-mail: jetspeed-user-h...@portals.apache.org
