The previous section mentioned that, although it is possible to pass open parameters to ATG servlet beans, those parameters should not be read with the standard getParameter() method. In fact, it is unlikely that your ATG servlet bean wants to see the actual value of an open parameter. In most situations, an ATG servlet bean wants to output the value of an open parameter. To do this, use the serviceParameter method of the request, as in the following example:

import javax.servlet.*;
import javax.servlet.http.*;
import atg.servlet.*;

public class DSBTest2 extends DynamoServlet {
  public DSBTest2 () {}
  public void service (DynamoHttpServletRequest request,
                       DynamoHttpServletResponse response)
       throws ServletException, IOException
    ServletOutputStream out = response.getOutputStream ();
    out.println ("Here's the value of the parameter 'storename':");
    request.serviceParameter ("storename", request, response);

The serviceParameter method obtains the value of the given parameter and displays it.

To demonstrate this, save the previous code sample as and compile it into a class file and create a corresponding Nucleus component in much the same way as you did in Simple ATG Servlet Bean Example. Create dsbtest2.jsp with the following contents:

<%@ taglib uri="/dspTaglib" prefix="dsp" %>

  <title>Storename Test</title>

<body bgcolor="#ffffff">
  <h1>Storename Test</h1>

<dsp:droplet name="/test/DSBTest2">
  <dsp:oparam name="storename">
    <h1>Joe's Hardware</h1>



Preview this page to see how it looks when processed and compiled.

The serviceParameter prints out any parameter including simple Strings and open parameters. If an open parameter includes dynamic elements such as dsp:valueof and dsp:droplet tags, those elements are also generated dynamically.

The serviceParameter method returns a Boolean value indicating whether the specified parameter was found or not (true if the parameter was found).

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