JSF 2: invoking managed bean directly

Question

I am new to JSF (2).

In Struts we can invoke an action from a URL like app.action. This invokes an action and returns a result page, say a JSP (initiall

Answer 1

If it's preparing data for an initial GET request, just do the job in (post)constructor of the request or view scoped managed bean associated with the page.

@ManagedBean
@RequestScoped
public class Bean {

    public Bean() {
        // Here.
    }

    @PostConstruct
    public void init(){ 
        // Or here, certainly if you rely on injected dependencies like @EJB.
    }

}

If it's controlling the request/response and may possibly redirect/navigate to another page, then do the job in preRenderView.

with

public void listener() {
    // ...

    // You want to redirect?
    externalContext.redirect(newURL);

    // Or you want to navigate?
    navigationHandler.handleNavigation(context, null, "newOutcome");
}

Or if you want to hook on all requests, then use a filter:

@WebFilter("/*")
public class MyFilter implements Filter {

    // ...

}

See also:

• Is there any easy way to preprocess and redirect GET requests?
• How to make a redirection in JSF