Hello world portlet

[Julio C. Rivera]

Hi!

I'm new in portlets. I'm trying to develop a Hello World portlet using
Tapestry.

When I deploy my hello world portlet in jetspeed I get this portlet content:

   org.apache.tapestry.PageNotFoundException

   Page 'View' not found in application namespace.

  - org.apache.tapestry.resolver.PageSpecificationResolverImpl.resolve(
  PageSpecificationResolverImpl.java:140)
  -
  
$PageSpecificationResolver_10c6cbde6ef.resolve($PageSpecificationResolver_10c6cbde6ef.java)
  -
  
$PageSpecificationResolver_10c6cbde6f0.resolve($PageSpecificationResolver_10c6cbde6f0.java)
  - org.apache.tapestry.pageload.PageSource.getPage(PageSource.java:115)

     ..............



Here my config files:

***********************
WEB-INF/web.xml
***********************
<!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>app</display-name>
 <servlet>
   <servlet-name>gapmuportlet</servlet-name>
   <servlet-class>org.apache.tapestry.ApplicationServlet</servlet-class>
 </servlet>
 <servlet-mapping>
   <servlet-name>gapmuportlet</servlet-name>
   <url-pattern>/app</url-pattern>
 </servlet-mapping>
</web-app>

************************
WEB-INF/portlet.xml
*************************
<portlet-app version="1.0"
 xmlns="http://java.sun.com/xml/ns/portlet/portlet-app_1_0.xsd";
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
 xsi:schemaLocation="http://java.sun.com/xml/ns/portlet/portlet-app_1_0.xsd
http://java.sun.com/xml/ns/portlet/portlet-app_1_0.xsd";>
 <portlet>
   <description xml:lang="EN"></description>
   <portlet-name>Gapmuportlet</portlet-name>
   <display-name xml:lang="EN">My Tapestry Portlet</display-name>
   <portlet-class>org.apache.tapestry.portlet.ApplicationPortlet
</portlet-class>
   <expiration-cache>-1</expiration-cache>
   <supports>
     <mime-type>text/html</mime-type>
     <portlet-mode>view</portlet-mode>
   </supports>
   <supported-locale>es</supported-locale>
   <portlet-info>
     <title>My Tapestry Portlet</title>
     <short-title>tapestry-portlet</short-title>
     <keywords></keywords>
   </portlet-info>
 </portlet>
</portlet-app>

*******************************************
WEB-INF/gapmuportlet/View.html
*******************************************
<h1>Hello World!!</h1>


Somebody have some tapestry portlet example?

Thanks in advance.

 Julio.