java - "Servlet" (server-side) initialization code in GWT

Question

How can I have a single time initialization on a server side of GWT app?

I may be thinking to much like HttpServlet where you can override init(), but old habits are long to lose ;)

What I am trying to do is:

• load a bunch of properties

• establish a connection to the database

Answer 1

You can add like mentioned in a comment a ServletContextListener.

public class ServerConfig implements ServletContextListener {

    public void contextInitialized(ServletContextEvent event) {
    // Do stuff on startup.
    }

    public void contextDestroyed(ServletContextEvent event) {
    // Do stuff on shutdown.
    }
}

Now put the new class on the server side, you also ave to register the Listener in your web.xml file :

<listener>
<listener-class>path.to.class.ServerConfig</listener-class> 
</listener>