I think you should use "2.0" for the portlet app version in the portlet descriptor. Jetspeed-2 does not invoke resource serving operation when the portlet application is "1.0".
<portlet-app id="ScatterPlot" version="2.0"> -Woonsan --- On Tue, 8/24/10, b_prajesh <[email protected]> wrote: > From: b_prajesh <[email protected]> > Subject: Trouble showing graph in portlet > To: [email protected] > Date: Tuesday, August 24, 2010, 6:42 PM > > 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(" \"" "); > > } > > > > > 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> > *********************************************************************** > -- > View this message in context: > http://old.nabble.com/Trouble-showing-graph-in-portlet-tp29524013p29524013.html > Sent from the Jetspeed - User mailing list archive at > Nabble.com. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
