Stefan,
Is their a reason you are not doing the calculation in the JSP? The JSP
has access to all of the parameters passed in the HTTP request and
portlet parameters. See JSP
<jetspeed_home>/WEB-INF/templates/jsp/portlets/html/JSP1_2andJetspeedTagLib.jsp
Paul Spencer
Stefan Kuhn wrote:
> Hi everybody,
> I've got a portlet which is a java class. I want that portlet to do some
> calculations and to return the result via a JSP. I understood that the
> EcsServletElement is the way to do that. So I wrote the following code:
>
> public ConcreteElement getContent(RunData runData) {
> HttpServletRequest req = runData.getRequest();
> String spec = req.getParameter("spectrum");
> //Here the calculations
> StringElement base=new StringElement();
> base.addElement(new EcsServletElement(runData,"result.jsp"));
> return(base);
> }
>
> I did it the way it's described in the Portlet Howto. It seems jetspeed can't
> find the jsp. The log is as follows:
>
>
> [Tue Feb 12 12:13:04 CET 2002] -- ERROR -- EcsServletElement: Could not
> include the following URL: result.jsp : null
> Exception: java.lang.NullPointerException
> Stack Trace follows:
> java.lang.NullPointerException
> at
> org.apache.jetspeed.util.servlet.EcsServletElement.output(EcsServletElement.java:127)
> at
> org.apache.jetspeed.util.servlet.EcsServletElement.output(EcsServletElement.java:110)
> at org.apache.ecs.ConcreteElement.output(ConcreteElement.java:322)
> at org.apache.ecs.GenericElement.toString(GenericElement.java:723)
> at
> org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java)
> at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java)
>
> and so on.
> I tried to give the absolute URL (I copied it from my browser where I get a
> result), but it isn't working. I understood, that if I give no path the JSP
> is looked for in the directory given in the TurbineResources.properties with
>
> services.JspService.templates =/WEB-INF/templates/jsp
>
> But it's working in no way.
> Help would be much appreciated. Thanks a lot!
>
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