[Actionframework-users] Help me out!!!

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Hi all,
I am new to Action Servlet and also to Velocity.

I want to display a page which shows a text field with
a value, which will be retreived from a Java class.
This means, as soon as I start my server and goto the
URL the page should display a text field showing a
value
which was returned by a Java class.

Right now this is the code I am using.

PortServlet.xml:

<?xml version="1.0"?>
<!DOCTYPE application SYSTEM
"http://www.actionframework.org/dtd/ActionServlet_0_94.dtd">

<application>
   <templates>
      <template name="Port.vm" is-new-session="true">
      	<invoke component="port" method="getPort()">
      	</invoke>
      </template>
   </templates>

	<components>
		<component name="port" class="core.ServerPort"
persistence="application"/>
	</components>
</application>

core.ServerPort.java:
class{ .....
	public int getPort() throws Exception {
                int value = 10;
		return value;
	}
	....
}

Port.vm:
<HTML>
#set( $Response.ContentType = "text/html" )
<BODY>
   <FORM NAME=Port METHOD="POST" ACTION="">

     	Port: <INPUT TYPE="Text" NAME="Port"
value="$port">
        <INPUT TYPE="Submit" VALUE="Apply">

   </FORM>
</BODY>
</HTML>

The log shows this error:

[init] ActionServlet runtime initialization OK
[debug] ActionServlet DEBUG [6460907] Creating
component 'port' (class: core.ServerPort) with
instantiator
'org.actionframework.instantiators.DefaultInstantiator'
[debug] ActionServlet DEBUG [6460907] Action
'[template: Port.vm]' -> invoking 'getPort()' of
'port'
[error] ActionServlet ERROR [6460907] Error ocurred in
action *unknown* (request type='http.get') -
org.actionframework.ActionServlet.onException()
org.actionframework.ActionException: null; nested
exception is: java.lang.ClassCastException: null

Somebody pls help me out!!!

Sorry for a lengthy email.

-ss.

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