Role of an instance

Question

Hi,
short question, how can I get the role of the active activity, when I have an instance object of another process (not the current one)?
I have tried to get the activity by "Activity(instance.activityName)", but this works only for activities of the current process, not of another one. So I tried to get the Process itself and cycle through the activity list, but there is also only the possibility to get the current one.
So, does anyone how to get the role for an instance of another process?
Many thanks for your help.
Kind regards
Matthias

Answer 1

Hi Matthias,
Here's one approach to getting the name of the activity and the role for an instance if all you know is the instance's id (e.g "/Test#Default-1.0/2/0"). Sure there are better ways to have done this.
It's a bit of overkill (it retrieves all the instances for the process "Test" and shows all of their activity and role names).
As you know, the instance id is a String formatted like this: "/Test#Default-1.0/2/0". In this example, you can use this instance id string to figure out the instance's number ("2") for the instance and the process id ("/Test"). Since you know the instance id, your logic would just need to create the session and the filter and the second of the two "for" loops shown below. The second "for" loop is iterating through an array, but the array will always have only one value since there will only be one instance with the unique instance number.
package papistudiotest;
import fuego.papi.BatchOperationException;
import fuego.papi.CommunicationException;
import fuego.papi.Comparison;
import fuego.papi.Filter;
import fuego.papi.InstanceInfo;
import fuego.papi.OperationException;
import fuego.papi.ProcessService;
import fuego.papi.ProcessServiceSession;
import fuego.papi.SearchScope;
import fuego.papi.StatusScope;
import fuego.papi.VarDefinition;
import fuego.papi.collections.InstanceInfoList;
import fuego.papi.collections.ProcessIdSet;
import java.util.Properties;
public class PapiInstance {
    public static void main(String[] args) {
        /////////////////// API Initialization ///////////////////
        Properties configuration = new Properties();
        configuration.setProperty(ProcessService.DIRECTORY_ID, "default");
        configuration.setProperty(ProcessService.PROJECT_PATH,
                                  "C:/OracleBPMWorkspace/TestProcess");
        configuration.setProperty(ProcessService.WORKING_FOLDER, "/tmp");
        int instNumber;
        instNumber = 0;
        try {
            ProcessService processService =
                ProcessService.create(configuration);
            /////////////////// Establish a session ///////////////////
            ProcessServiceSession session =
                processService.createSession("test", "test", null);
            /////////////////// Operate with PAPI ///////////////////
            // get the instances
            for (InstanceInfo instance: session.processGetInstances("/Test")) {
                System.out.println("** fetching id -> " +
                                   instance.getInstanceIn());
                instNumber = instance.getInstanceIn();
                // Search instances which begin with a specific string in an external variable value and
                // stay in a specific activity.
                Filter filter;
                filter = ProcessService.createFilter();
                SearchScope searchScope =
                    new SearchScope(fuego.papi.ParticipantScope.ALL,
                                    fuego.papi.StatusScope.ALL, null);
                searchScope.setStatusScope(StatusScope.ONLY_INPROCESS);
                filter.setSearchScope(searchScope);
                filter.addAttribute(VarDefinition.getDefaultVarDefinition(VarDefinition.INSTANCE_NUMBER),
                                    Comparison.IS, instNumber);
                filter.setMatchAll(true);
                ProcessIdSet pids;
                pids = ProcessIdSet.create();
                pids.add("/Test");
                // Search instances.
                InstanceInfoList instances;
                instances =
                        session.processesGetInstancesByFilter(pids, filter);
                for (InstanceInfo ii: instances.toArray()) {
                    ii.getId();
                    System.out.println("id is: " + ii.getId());
                    System.out.println("activity name - this is the one: " +
                                       ii.getActivityName());
                    System.out.println("role name - this is the one: " +
                                       ii.getRoleId());
            /////////////////// Release API Resources ///////////////////
            /////////////////// Close the session ///////////////////
            session.close();
            /////////////////// Release API Resources ///////////////////
            processService.close();
        } catch (CommunicationException e) {
            System.out.println("Could not connect to Directory Service");
            e.printStackTrace();
        } catch (OperationException e) {
            System.out.println("Could not perform the requested operation");
            e.printStackTrace();
        } catch (BatchOperationException e) {
            System.out.println("Could not perform the batch operation");
            e.printStackTrace();
}Hope this helps,
Dan