On Mon, Jan 23, 2012 at 6:35 AM, ich du <[email protected]> wrote:
> i try to sort up the deployment of my webapp. so i need to override
> contextInitilaized in GuiceServletContextListener. there i need to check
> the state of some module-bound objects.
> but i get problems:
> i field-injected the needed objects (a logger and a external datasource)
> and tried to use them in contextInitialized but i get NullPointerExceptions
> all injected stuff is null in scope of contextInitialized (later, after
> deployment all injections work properly). the problem is that all guice
> injection starts within contextInitialized:
> "super.contextInitialized(servletContextEvent);"
>
> so how to let guice inject the fields (or do i need another kind of
> injection?) after "super.contextInitialized(servletContextEvent);"?
>
Does your code look like this?
public class Main extends GuiceServletContextListener {
@Override protected Injector getInjector() {
return Guice.createInjector(stage,
new MyServletModule(),
// ... other modules ...
new AbstractModule() {
@Override protected void configure() {
requestInjection(Main.this);
}
}
));
}
@Override public void contextInitialized(ServletContextEvent event) {
super.contextInitialized(event);
// use someField here
}
@Inject volatile SomeType someField;
}
This pattern works for me. If it doesn't work for you, I'd like to know why
not.
--tim
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