Read GP Context from WD Application

Question

Hi Experts,
is it possible to access the Context of a Guided Procedure from a standalone WebDynpro application?
I have a Guided Procedure Process with several parameters and I want to develop a custom overview screen that shows the status of several process instances including some of the process parameters.
This overview screen should look similar to the standard GP runtime but should be enhanced with parameters of the process (which will be entered by the processing user during execution.)
Any ideas how to achieve this? Is there a possibility in the API to access IGPExecutionContext directly from a WD Application?
Many thanks in advance,
Johannes

Answer 1

Hi Johannes,
You can try the GP design time API to achieve this. You can refer the <a href="https://help.sap.com/javadocs/NW04S/current/gp/index.html">GP Design Time API</a> for this.
I tried with the GP runtime manager to start/stop a process. Below is a sample code:
  public void showAllProcess( )
    //@@begin showAllProcess()
       IWDMessageManager msg = wdComponentAPI.getMessageManager();
try{
                IWDClientUser wdUser = WDClientUser.getCurrentUser();
             IUser user = wdUser.getSAPUser();
             rtm = GPProcessFactory.getRuntimeManager();          
             array = rtm.getRunningInstances(0,wdContext.currentInputElement().getStarDate() ,wdContext.currentInputElement().getEndDate(),user);
                catch(Exception e)
                      msg.reportException(e.getMessage(), false);
             for (int i=0; i<array.length; i++){
                 String instanceId = array<i>.getProcessInstanceID();
                 String processdescription = array<i>.getDescription();
                 String processTitle = array<i>.getTitle();
                 int status = array<i>.getStatus();
                 Date processStartDate = array<i>.getStartDate();
                 IWDNodeElement outputElement = wdContext.nodeOutput().createElement();
                 outputElement.setAttributeValue("processID", instanceId);
                 outputElement.setAttributeValue("processDesc", processdescription);
                 //outputElement.setAttributeValue("processStartDate", new java.util.Date(processStartDate.getTime()));
                 outputElement.setAttributeValue("processTitle", processTitle);
                 outputElement.setAttributeValue("status", new Integer(status));
                 wdContext.nodeOutput().addElement(outputElement);
    //@@end
  public void stopProcess( )
    //@@begin stopProcess()
     IWDMessageManager msg = wdComponentAPI.getMessageManager();
     try {
          IWDClientUser wdUser = WDClientUser.getCurrentUser();
          IUser user = wdUser.getSAPUser();
          IGPProcessInstance instance = rtm.getProcessInstance(array[wdContext.nodeOutput().getLeadSelection()], user);
          msg.reportSuccess(instance.getTemplate().getTitle());
          rtm.stopProcess(instance,user);
          wdContext.nodeOutput().removeElement(wdContext.nodeOutput().getElementAt(wdContext.nodeOutput().getLeadSelection()));
     } catch (WDUMException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
          msg.reportException(e.getLocalizedMessage(), true);
     } catch (GPEngineException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
          msg.reportException(e.getLocalizedMessage(), true);
     } catch (GPInvocationException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
          msg.reportException(e.getLocalizedMessage(), true);
     } catch(Exception e)
          e.printStackTrace();
          msg.reportException(e.getLocalizedMessage(), true);
    //@@end
You can more details regarding the process from the process instance object.
Thanks,
Dipankar