Need SeamServletFilter Example

[jefffry]

I've been trying to access my seam components within my servlet without success. I keep getting null instances. Have I performed the steps correctly?

1.Added SeamServletFilter to web.xml.

<!-- propogate seam context to servlets -->
<filter>
 <filter-name>Seam Servlet Filter</filter-name>
 <filter-class>org.jboss.seam.servlet.SeamServletFilter</filter-class>
</filter>
<filter-mapping>
 <filter-name>Seam Servlet Filter</filter-name>
 <url-pattern>*.serv</url-pattern>
</filter-mapping>

2. Explicitly passed conversation id to my servlet.

<h:outputLink rendered="#{test.script!=null}" value="/TestSuiteAdmin/downloadTestScript.serv">
 <f:param name="conversationId" value="#{conversation.id}"/>
 <h:outputText value="download scipt"/>
</h:outputLink>

3. Restore the conversation and get my instance in my servlet.

 protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
 // TODO Auto-generated method stub
 super.doGet(req, resp);

 Manager mgr = Manager.instance();
 String conversation = req.getParameter("conversationId");
 mgr.restoreConversation(req.getParameterMap());
 Test test = (Test)Component.getInstance("test",false);

 resp.setContentType("text/plain");

 resp.getWriter().print(test.getScript());
 }

"test" is always null.

What am I doing wrong?

[jefffry]

@Override
 protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
 try {

 String configId = req.getParameter("id");

 EntityManagerFactory factory = (EntityManagerFactory)Naming.getInitialContext().lookup("java:/EntityManagerFactory");
 EntityManager em = factory.createEntityManager();
 Config config = (Config)em.find(Config.class, new Long(configId));

 resp.setContentType(config.getFileType());

 resp.getOutputStream().write(config.getFileData());
 }
 catch(Exception e){e.printStackTrace();}
 }