Start GP Process through Webdynpro using GP APIs

Question

Hello,
I am using GP APIs to start my process programatically in webdynpro using the link :
http://help.sap.com/SAPHELP_NW70EHP1/helpdata/EN/33/198141f906040de10000000a1550b0/frameset.htm
The first screen is a Webdynpro For Java Callable Object which has a Submit button ...on the click of this button i have written the code to start the process.....the process is getting started alright which i checked in NWA -> Guided Procedures -> Process Instance...but then it does not move to the next screen.....but just stays there........the structure params i am sending as blank since my process does not expose any input parameters.(as specified in the Library)....
Any help would be highly appreciated...
Regards,
Anil

Answer 1

Hi,
Try this code:
//@@begin startProcess()
     wdContext.currentContextElement().setProcessID("/Process ID of GP process/");
     IUser adminUser = null;
     IUser userRequesterUser = null;
     try {
          IWDClientUser clientUser = null;
          try {
               clientUser = WDClientUser.getCurrentUser();
          } catch (WDUMException e) {
               // TODO Auto-generated catch block
               e.printStackTrace();
          IUser user = clientUser.getSAPUser();
          String loginUser = user.getUniqueName();
          adminUser = UMFactory.getUserFactory().getUserByLogonID(/*Owner of process */);
          userRequesterUser = UMFactory.getUserFactory().getUserByLogonID(loginUser);
     } catch (UMException e1) {
          wdComponentAPI.getMessageManager().reportException("UME ERR " + e1.getMessage(),true);
          // TODO Auto-generated catch block
          e1.printStackTrace();
     try {
          IGPUserContext userContext = GPContextFactory.getContextManager().createUserContext(adminUser);
          IGPProcess process = GPProcessFactory.getDesigntimeManager().getActiveTemplate(wdContext.currentContextElement().getProcessID(), userContext);
          IGPRuntimeManager rtm = GPProcessFactory.getRuntimeManager();
          IGPProcessRoleInstanceList roles = rtm.createProcessRoleInstanceList();
          int rolenum = process.getRoleInfoCount();
          String strRoleName = "";
          IGPStructure userStruct = null;
          // iterate over the required roles
          for (int i = 0; i < rolenum; i++) {
               // create a new role instance by specifying the role's unique name
               IGPProcessRoleInstance roleInstance = roles.createProcessRoleInstance(process.getRoleInfo(i).getRoleName());
               strRoleName = process.getRoleInfo(i).getRoleName();
//               wdComponentAPI.getMessageManager().reportSuccess("Roles - " + process.getRoleInfo(i).getRoleName());
               // add a user to the role instance
               if (strRoleName.startsWith("Requester")) {
                    roleInstance.addUser(userRequesterUser);
               } else if (strRoleName.startsWith("role.")) {
                    roleInstance.addUser(adminUser);
               Collection users = roleInstance.getUserAsCollection();
               IUser usr = null;
               Iterator ietr = users.iterator();
               while (ietr.hasNext()) {
                    usr = (IUser) ietr.next();
               roles.addProcessRoleInstance(roleInstance);
          //add values to the input parameters of the process
          IGPStructure params = GPStructureFactory.getStructure(process.getInputParameters());
          params.setAttributeValue("/*Parameter Group Name of Process /", /Value to be passed*/);
          IGPProcessInstance prInstance = rtm.startProcess(process, "/Name of Process/", "This process has been started using the GP public API", userRequesterUser, roles, params, userRequesterUser);
     catch (ConnectionException e) {
           //TODO Auto-generated catch block
          e.printStackTrace();
     } catch (CommandException e) {
           //TODO Auto-generated catch block
          e.printStackTrace();
     } catch (GPInvocationException e12) {
          wdComponentAPI.getMessageManager().reportException("Invok ERR " + e12.getMessage(),true);
           //TODO Auto-generated catch block
          e12.printStackTrace();
     } catch (GPEngineException e2) {
          wdComponentAPI.getMessageManager().reportException("Invok ERR 2 " + e2.getMessage(),true);
           //TODO Auto-generated catch block
          e2.printStackTrace();
//@@end
Regards,
Niraj
Edited by: Niraj Kumar on Dec 4, 2009 8:32 AM