call a servlet onload from a GWT application

Question

I need to read database properties from server.xml and need this information on load of the page.How do I acheive it in GWT ?

Answer 1

I am not sure if there is anything specific to GWT. But I guess you could use

Servlet.getResourceAsStream

Or if you use JSP, you could use the application implicit object to get the ServletContext and you can use getResourceAsStream

Some pointers here and here

Answer 2

In your onModuleLoad() call an RPC through a

DeferredCommand.addCommand(new Command() {
    public void execute () {
      getDBParameters();
    }
  }

where getDbParameters is a method that populates the values for you by calling an RPC.

See http://code.google.com/webtoolkit/doc/latest/DevGuideServerCommunication.html for how to communicate with server.

On the Server side just have your RPC return a HashMap of properties and read those.