If you have a Servlet 2.3 compatible container (e.g. Tomcat 4.x or later)
you can implement a ServletContextListener which will be notified when your
context is started and gives you access to the ServletContext.
...
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
public class StartUpListener implements ServletContextListener {
public void contextInitialized(ServletContextEvent evt) {
MyBean bean = new MyBean();
evt.getServletContext().setAttribute("MyKey", bean);
}
public void contextDestroyed(ServletContextEvent evt) {
// Whatever shutdown processing you need goes here.
}
}
Listeners are configured in web.xml:
<listener>
<listener-class>myapp.StartUpListener</listener-class>
</listener>
Another way that is Struts specific but also works with Servlet 2.2
containers is to implement a PlugIn.
...
import org.apache.struts.action.ActionServlet;
import org.apache.struts.action.PlugIn;
import org.apache.struts.config.ModuleConfig;
public class MyPlugIn implements PlugIn {
public void init(ActionServlet servlet, ModuleConfig config)
throws ServletException {
MyBean bean = new MyBean();
servlet.getServletContext().setAttribute("MyKey", bean);
}
public void destroy() {
// Whatever shutdown processing you need goes here.
}
}
A PlugIn is configured at the end of your struts configuration file
(struts-config.xml) See the Struts example webapp for a demonstration of
plugins:
...
<plug-in className="myapp.MyPlugIn"/>
Finally, you could create a Servlet that runs automatically at start up and
set-up any ServletContext attributes in it's init() method.
My preference is to use a ServletContextListener if possible, or a PlugIn.
Steve
> -----Original Message-----
> From: Kannan [mailto:[EMAIL PROTECTED]
> Sent: October 7, 2003 8:35 AM
> To: Struts Users Mailing List
> Subject: setting application context
>
>
> Hi all!
> I have a lot of drop down menus in my web application.
> I need to set them as collection objects in servlet context.
> that should load up when the application ( tomcat start..) load up.
> Then i can play with struts by iterating it..
>
> Can any one help me , How to do this? How to write the loader class and
> set it up...?
>
> thanks in advance.
> Kannan.
>
>
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