public List<String> getIds(String fieldName, Object value) throws AppCatalogException {
   List<String> globusSubmissionResourceIDs = new ArrayList<String>();
   EntityManager em = null;
   try {
     em = AppCatalogJPAUtils.getEntityManager();
     em.getTransaction().begin();
     Query q;
     AppCatalogQueryGenerator generator = new AppCatalogQueryGenerator(GLOBUS_SUBMISSION);
     List results;
     if (fieldName.equals(GlobusJobSubmissionConstants.SUBMISSION_ID)) {
       generator.setParameter(GlobusJobSubmissionConstants.SUBMISSION_ID, value);
       q = generator.selectQuery(em);
       results = q.getResultList();
       if (results.size() != 0) {
         for (Object result : results) {
           GlobusJobSubmission globusJobSubmission = (GlobusJobSubmission) result;
           globusSubmissionResourceIDs.add(globusJobSubmission.getSubmissionID());
         }
       }
     } else if (fieldName.equals(GlobusJobSubmissionConstants.GLOBUS_GATEKEEPER_EP)) {
       generator.setParameter(GlobusJobSubmissionConstants.GLOBUS_GATEKEEPER_EP, value);
       q = generator.selectQuery(em);
       results = q.getResultList();
       if (results.size() != 0) {
         for (Object result : results) {
           GlobusJobSubmission globusJobSubmission = (GlobusJobSubmission) result;
           globusSubmissionResourceIDs.add(globusJobSubmission.getSubmissionID());
         }
       }
     } else if (fieldName.equals(GlobusJobSubmissionConstants.SECURITY_PROTOCAL)) {
       generator.setParameter(GlobusJobSubmissionConstants.SECURITY_PROTOCAL, value);
       q = generator.selectQuery(em);
       results = q.getResultList();
       if (results.size() != 0) {
         for (Object result : results) {
           GlobusJobSubmission globusJobSubmission = (GlobusJobSubmission) result;
           globusSubmissionResourceIDs.add(globusJobSubmission.getSubmissionID());
         }
       }
     } else if (fieldName.equals(GlobusJobSubmissionConstants.RESOURCE_JOB_MANAGER)) {
       generator.setParameter(GlobusJobSubmissionConstants.RESOURCE_JOB_MANAGER, value);
       q = generator.selectQuery(em);
       results = q.getResultList();
       if (results.size() != 0) {
         for (Object result : results) {
           GlobusJobSubmission globusJobSubmission = (GlobusJobSubmission) result;
           globusSubmissionResourceIDs.add(globusJobSubmission.getSubmissionID());
         }
       }
     } else {
       em.getTransaction().commit();
       em.close();
       logger.error(
           "Unsupported field name for Globus Submission resource.",
           new IllegalArgumentException());
       throw new IllegalArgumentException(
           "Unsupported field name for Globus Submission resource.");
     }
     em.getTransaction().commit();
     em.close();
   } catch (Exception e) {
     logger.error(e.getMessage(), e);
     throw new AppCatalogException(e);
   } finally {
     if (em != null && em.isOpen()) {
       if (em.getTransaction().isActive()) {
         em.getTransaction().rollback();
       }
       em.close();
     }
   }
   return globusSubmissionResourceIDs;
 }