Update activity loading

components/application-mgt/io.entgra.device.mgt.core.application.mgt.core/src/main/java/io/entgra/device/mgt/core/application/mgt/core/dao/impl/subscription/GenericSubscriptionDAOImpl.java

@@ -1438,7 +1438,6 @@ public class GenericSubscriptionDAOImpl extends AbstractDAOImpl implements Subsc
     }
 
     public Activity getOperationAppDetails(int operationId, int tenantId) throws ApplicationManagementDAOException {
-        Activity activity = null;
         try {
         String sql = "SELECT "
                 + "AP.NAME, "
@@ -1456,18 +1455,7 @@ public class GenericSubscriptionDAOImpl extends AbstractDAOImpl implements Subsc
                 stmt.setInt(1, operationId);
                 stmt.setInt(2,tenantId);
                 try (ResultSet rs = stmt.executeQuery()) {
-                    if (log.isDebugEnabled()) {
-                        log.debug("Successfully retrieved app details for operation "
-                                + operationId);
-                    }
-                    while (rs.next()) {
-                        activity = new Activity();
-                        activity.setAppName(rs.getString("NAME"));
-                        activity.setUsername(rs.getString("SUBSCRIBED_BY"));
-                        activity.setPackageName(rs.getString("PACKAGE_NAME"));
-                        activity.setStatus(rs.getString("STATUS"));
-                    }
-                    return activity;
+                    return DAOUtil.loadOperationActivity(rs);
                 }
             }
         } catch (DBConnectionException e) {
@@ -1479,6 +1467,10 @@ public class GenericSubscriptionDAOImpl extends AbstractDAOImpl implements Subsc
             String msg = "Error occurred when processing SQL to retrieve app details of operation" + operationId;
             log.error(msg, e);
             throw new ApplicationManagementDAOException(msg, e);
+        }  catch (UnexpectedServerErrorException e) {
+            String msg = "More than one app for operation " + operationId;
+            log.error(msg, e);
+            throw new ApplicationManagementDAOException(msg, e);
         }
     }
 }

components/application-mgt/io.entgra.device.mgt.core.application.mgt.core/src/main/java/io/entgra/device/mgt/core/application/mgt/core/util/DAOUtil.java

@@ -21,6 +21,7 @@ import com.google.gson.Gson;
 import com.google.gson.reflect.TypeToken;
 import io.entgra.device.mgt.core.application.mgt.common.dto.*;
 import io.entgra.device.mgt.core.application.mgt.core.exception.UnexpectedServerErrorException;
+import io.entgra.device.mgt.core.device.mgt.common.operation.mgt.Activity;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.json.JSONException;
@@ -361,6 +362,32 @@ public class DAOUtil {
         return subscriptionDTOS;
     }
 
+    public static Activity loadOperationActivity(ResultSet rs) throws SQLException, UnexpectedServerErrorException {
+        List<Activity> activity  = loadOperationActivities(rs);
+        if (activity.isEmpty()) {
+            return null;
+        }
+        if (activity.size() > 1) {
+            String msg = "Internal server error. Found more than one app for operation";
+            log.error(msg);
+            throw new UnexpectedServerErrorException(msg);
+        }
+        return activity.get(0);
+    }
+
+    public static  List<Activity> loadOperationActivities (ResultSet rs) throws SQLException {
+        List<Activity> activities = new ArrayList<>();
+        while (rs.next()) {
+            Activity activity = new Activity();
+            activity.setAppName(rs.getString("NAME"));
+            activity.setUsername(rs.getString("SUBSCRIBED_BY"));
+            activity.setPackageName(rs.getString("PACKAGE_NAME"));
+            activity.setStatus(rs.getString("STATUS"));
+            activities.add(activity);
+        }
+        return activities;
+    }
+
     public static VppUserDTO loadVppUser(ResultSet rs) throws SQLException, UnexpectedServerErrorException {
         List<VppUserDTO> vppUserDTOS = loadVppUsers(rs);
         if (vppUserDTOS.isEmpty()) {

components/device-mgt/io.entgra.device.mgt.core.device.mgt.api/src/main/java/io/entgra/device/mgt/core/device/mgt/api/jaxrs/service/impl/ActivityProviderServiceImpl.java

@@ -169,10 +169,16 @@ public class ActivityProviderServiceImpl implements ActivityInfoProviderService
                 }
                 SubscriptionManager subscriptionManager = DeviceMgtAPIUtils.getSubscriptionManager();
                 appActivity = subscriptionManager.getOperationAppDetails(id);
-                activity.setUsername(appActivity.getUsername());
-                activity.setPackageName(appActivity.getPackageName());
-                activity.setAppName(appActivity.getAppName());
-                activity.setStatus(appActivity.getStatus());
+                if (appActivity != null) {
+                    activity.setUsername(appActivity.getUsername());
+                    activity.setPackageName(appActivity.getPackageName());
+                    activity.setAppName(appActivity.getAppName());
+                    activity.setStatus(appActivity.getStatus());
+                } else {
+                    String msg = "Cannot find the app details related to the operation ";
+                    log.error(msg);
+                    Response.status(404).entity(msg).build();
+                }
             }   else {
                 activity = dmService.getOperationByActivityIdAndDevice(id, deviceIdentifier);
             }