Using the UWL API inside a Web Service

Question

I wrote a Web Service to get the number of new tasks and the total number of tasks for a user like it is displayed in the UWL in the DefaultView.
The numbers are retrieved by the following code:
user = com.sap.security.api.UMFactory.getAuthenticator().getLoggedInUser();
// JNDI lookup for getting the service because we are not in the PRT container
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sapportals.portal.prt.registry.PortalRegistryFactory");
InitialContext initialContext = new InitialContext(env);
uwlService = (IUWLService) initialContext.lookup("/broker/services/" + IUWLService.ALIAS_KEY);
if (uwlService == null) {
     throw new Exception("Cannot get UWL Service");
context = new UWLContext();
if (user == null) {
     throw new Exception("No user");
context.setUser(user);
context.setLocale(user.getLocale());
session = uwlService.beginSession(context, 200);
context.setSession(session);
context.setAllowBackEndConnections(true);
itemManager = uwlService.getItemManager(context);
UWLView view = uwlService.getViewManager(context).getView("DefaultView", context);
if (view != null) {
     QueryProperties properties = new QueryProperties();
     properties.setMaxNumberOfItemsToFetch(0);
     QueryResult result = itemManager.getItemsForView(context, view, properties, null);
     totals = itemManager.getTotalAndEmphasizedItemCountForView(context, view, "", null);
In the first step I chose basic authentication. When debugging I see that the web service gets the information about the logged on user. The UWLService, item manager, session and view, all of them are determined resp. created.
But when calling getItems the UWL exception "Logged in users context or session doesn't exist" is thrown.
When calling the same functionality from Web Dynpro everything works fine.
Service and session are determined like this
uwlService = (IUWLService) WDPortalUtils.getServiceReference(IUWLService.ALIAS_KEY);
context = new UWLContext();
IUser user = WDClientUser.getLoggedInClientUser().getSAPUser();
wdContext.currentUIStateElement().setUserName(user.getFirstName() + " " + user.getLastName());
context.setUser(user);
context.setLocale(WDResourceHandler.getCurrentSessionLocale());
session = uwlService.getUwlSessionForWebDynproClient(context);
Does anyone know how to work with the UWL API in a web service context?
Thanks in advance
Antje

Answer 1

Hi Experts,
We are also facing the same issue as of Yomesh.
The strange part here is that, yesterday, the code was fetching the User and we were able to run the whole web service.
Suddenly, this doesnt seems to be working today. And after debugging, we found that, the User is not being returned with the below code:
user = UMFactory.getAuthenticator().getLoggedInUser(wsContext.getHttpServletRequest(), null);
Any help is highly appreciated.
Thanks in Advance!!
BR,
Uday