Hi,
I'm following the Expenses Sample that can be found in the SDK. I'm
writing a demo in which I would authenticate the user via GAE Users
Service.
I hit some problem in which the UserService userService =
UserServiceFactory.getUserService() is always null in the Service
Locator part of the Request Factory anyway here are my sample code.
This are my server side code.
package **.server;
import com.google.appengine.api.users.User;
import com.google.appengine.api.users.UserService;
import com.google.appengine.api.users.UserServiceFactory;
import com.google.web.bindery.requestfactory.shared.ServiceLocator;
/**
* Gives a RequestFactory system access to the Google AppEngine
UserService.
*/
public class UserServiceLocator implements ServiceLocator {
public UserServiceWrapper getInstance(Class<?> clazz) {
final UserService userService =
UserServiceFactory.getUserService();
return new UserServiceWrapper() {
public String createLoginURL(String destinationURL) {
String loginURL =
userService.createLoginURL(destinationURL);
return loginURL;
}
public String createLogoutURL(String destinationURL) {
String logoutURL =
userService.createLogoutURL(destinationURL);
return logoutURL;
}
public User getCurrentUser() {
User user = userService.getCurrentUser();
return user;
}
};
}
}
public interface UserServiceWrapper {
public String createLoginURL(String destinationURL);
public String createLogoutURL(String destinationURL);
public User getCurrentUser();
}
And here is my shared folder code
package **.shared;
import com.google.web.bindery.requestfactory.shared.ProxyForName;
import com.google.web.bindery.requestfactory.shared.ValueProxy;
/**
* Client visible proxy of Google AppEngine User class.
*/
@ProxyForName("com.google.appengine.api.users.User")
public interface GaeUserProxy extends ValueProxy {
String getNickname();
String getEmail();
}
import com.google.web.bindery.requestfactory.shared.RequestFactory;
public interface MercadoRequestFactory extends RequestFactory{
// UserEntityRequest userEntityRequest();
GaeUserServiceRequest userServiceRequest();
}
And here is how I instantiate it using GIN
package **.client.ioc
@Provides
@Singleton
public RequestFactory getRequestFactory(EventBus eventBus) {
RequestFactory requestFactory = GWT.create(RequestFactory
.class);
requestFactory.initialize(eventBus);
return requestFactory;
}
And here is how I use this in my client
package **.client.view
@Inject
RequestFactory requestFactory ;
@Override
public void setUser() {
gaeUserServiceRequest = requestFactory.userServiceRequest();
gaeUserServiceRequest.getCurrentUser().to(new
Receiver<GaeUserProxy>() {
@Override
public void onSuccess(GaeUserProxy response) {
if(response == null) {
signingLink.setText("Sign In");
lblUserEmailAddress.setText("Guest");
createLoginURL();
} else {
signingLink.setText("Sign Out");
lblUserEmailAddress.setText(response.getNickname());
createLogoutURL();
}
}
});
gaeUserServiceRequest.fire();
}
The problem here is the GaeUserProxy response is always null. I trace
the problem and found out that the UserService userService =
UserServiceFactory.getUserService() in my server side
UserServiceLocator is always null. What seems to be the problem?
I'm using the GWT 2.4 BTW.
TIA
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