Error while obtaining attributes from Map on client side

[badrifx]

Be sure your post includes:

1. Using Smart GWT 2.2

2. IE8 is browser

3.

public interface AdminMainService extends RemoteService {
Map<String, String> findCookieByName(String cookieName1, String cookieName2) throws IllegalArgumentException;
}

public interface AdminMainServiceAsync {
void findCookieByName(String cookieName1, String cookieName2, AsyncCallback<Map<String, String>> asyncCallback);
}

public class AdminMainServiceImpl extends RemoteServiceServlet implements
		AdminMainService {
public Map<String, String> findCookieByName(String cookieName1, String cookieName2) {
Map<String, String> hmUserName = new HashMap<String, String>();
String username = (String) this.getThreadLocalRequest().getAttribute("username");	
hmUserName.put("username", username);
return hmUserName ;
}

} // class end

The AdminMain class gets called initially at the client side.

public class AdminMain implements EntryPoint {

  public void onModuleLoad() {

adminMainService.findCookieByName("username", "SM12", new AsyncCallback<Map<String, String>>() {
			public void onSuccess(Map<String, String> result) {
				if(result != null) {
                        process further & display the page
                                 }
}

4. The adminMainService.findCookieByName gets called. After that the browser displays UnCaught Exception.

2013-05-14 18:28:43,922 [ERROR] Uncaught Exception
java.lang.ClassCastException:
null
at Unknown.Wtb(Unknown source:0)
at Unknown.qS(Unknown source:0)
at Unknown.sp(Unknown source:0)
at Unknown.C6(Unknown source:0)
at Unknown._N(Unknown source:0)
at Unknown.DO(Unknown source:0)
at Unknown.anonymous(Unknown source:0)
at Unknown.JH(Unknown source:0)
at Unknown.anonymous(Unknown source:0)

Looking at the Interfaces & Implementation, I am using Map.
I am not sure why I get ClassCastException & null printed below ClassCastException.

Can anyone guide me what is the right approach for obtaining request parameters?

Is using this.getThreadLocalRequest().getAttribute("username"); right approach?

The username is being set in httpservletrequest by a filter class. I have verified that the value always exists & not null.


Thanks

[l.arcangeli]

Hi,
Perhaps a trivial suggestion, but are you sure that you set an Attribute and not a Parameter?
Maybe a:

getThreadLocalRequest().getParameter("username");

could solve?

(I think also you could avoid the "this." prefix)

Bye,

Luca.