RE: Pluto 1.1.4 - java.lang.InstantiationException while deploying

In my attempt to push content into portlet#B from portlet#A I have tried to use the session by following the suggestions given at http://allu.wordpress.com/category/portlets/


Here is my code in the render method of HelloWorld portlet

public void render(javax.portlet.RenderRequest request, javax.portlet.RenderResponse response) {
        response.setContentType("text/html");
        PrintWriter writer=null;
try{
        writer=response.getWriter();
        response.getWriter().println("Helloy2z Portlet" + writer);
} catch (Exception e) {};
        request.getPortletSession().setAttribute("writer", writer, PortletSession.APPLICATION_SCOPE);
        request.getPortletSession().setAttribute("hello", "there234", PortletSession.APPLICATION_SCOPE);
        PortletContext context = getPortletConfig().getPortletContext();
       context.setAttribute("hello2", "amen");
}

Here is the code in the processAction method of Portlet#B

PortletContext context = getPortletConfig().getPortletContext();
      String a=(String) context.getAttribute("hello2");

PrintWriter pw=(PrintWriter)request.getPortletSession().getAttribute("writer", PortletSession.APPLICATION_SCOPE);

String h = (String) request.getPortletSession().getAttribute("hello", PortletSession.APPLICATION_SCOPE);


All a, h and pw are coming out as null.

What am I doing wrong here?

Thanks
Murthy
-----Original Message-----
From: Murthy Gandikota
Sent: Wednesday, October 17, 2007 2:28 PM
To: Murthy Gandikota; '[email protected]'
Subject: RE: Pluto 1.1.4 - java.lang.InstantiationException while deploying

I have learnt my lesson with HTML frames. They are only support by IE. Frames suck!

So this got me to thinking, how can I click on some link in Portal#1 and change the appearance of Portal#2? So far I have no answers. Can someone show me a hello world example, where clicking a helloworld link on Portal#1 displays the text hello world in Portal#2?

Thanks for your help
Murthy

-----Original Message-----
From: Murthy Gandikota
Sent: Thursday, September 06, 2007 9:26 AM
To: [email protected]
Subject: RE: Pluto 1.1.4 - java.lang.InstantiationException while deploying

I could make my helloworld work after adding the page in the admin screen.
Wonder why no one mentioned that :-)

What is the difference between frames and containers? It seems whatever
is displayed on the Pluto portal can be done with frames. Am I missing
something? Can we layer containers one top of another?

Coming from a Tomcat 5.5.3 and JSP/Servlet background, Pluto 1.1.4 is
much better. So please don't get me wrong.

I'd appreciate if someone could answer my questions.

Thanks
Murthy

-----Original Message-----
From: Murthy Gandikota [mailto:[email protected]]
Sent: Tuesday, September 04, 2007 8:05 PM
To: [email protected]
Subject: RE: Pluto 1.1.4 - java.lang.InstantiationException while deploying

I followed the steps indicated by
a) http://www.ociweb.com/jnb/jnbAug2006.html
b) http://portals.apache.org/pluto/v11/deploying.html

Successfully created the war file with maven and deployed without errors

I still see the exception given below.

The URL given in (a) uses JetSpeed2. Do I need that too?

Thanks
Murthy
-----Original Message-----
From: Murthy Gandikota [mailto:[email protected]]
Sent: Tuesday, September 04, 2007 6:22 PM
To: [email protected]
Subject: RE: Pluto 1.1.4 - java.lang.InstantiationException while deploying

Ben Wrote:
>Probably the problem that you are having is related to:

>>       <servlet-class>javax.portlet.GenericPortlet
>>       </servlet-class>

>This is in an incorrect way to map the servlet.  This class should be
>org.apache.pluto.core.PortletServlet.

With the change done as suggested above the error now is:

SEVERE: Servlet.service() for servlet HelloWorld threw exception
java.lang.NullPointerException
        at org.apache.pluto.core.PortletServlet.dispatch(PortletServlet.java:196)
        at org.apache.pluto.core.PortletServlet.doGet(PortletServlet.java:145)

I think the exception in the dispatch is because the following session variables are not set:

javax.portlet.response
javax.portlet.request
org.apache.pluto.core.method

The relevant code from PortletServlet.java

// Retrieve attributes from the servlet request.
        Integer methodId = (Integer) request.getAttribute(
            Constants.METHOD_ID);

        portletRequest = (InternalPortletRequest) request.getAttribute(
            Constants.PORTLET_REQUEST);

        portletResponse = (InternalPortletResponse) request.getAttribute(
            Constants.PORTLET_RESPONSE);


I'd appreciate some more help. May be someone can post the web.xml that works!

Thanks
Murthy