Fix duplicate group and role error handling responses

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/service/impl/RoleManagementServiceImpl.java

@@ -54,6 +54,7 @@ import org.wso2.carbon.registry.core.session.UserRegistry;
 import org.wso2.carbon.registry.resource.services.utils.ChangeRolePermissionsUtil;
 import org.wso2.carbon.user.api.*;
 import org.wso2.carbon.user.core.common.AbstractUserStoreManager;
+import org.wso2.carbon.user.core.constants.UserCoreErrorConstants.ErrorMessages;
 import org.wso2.carbon.user.mgt.UserRealmProxy;
 import org.wso2.carbon.user.mgt.common.UIPermissionNode;
 import org.wso2.carbon.user.mgt.common.UserAdminException;
@@ -316,21 +317,31 @@ public class RoleManagementServiceImpl implements RoleManagementService {
                     entity("Role '" + roleInfo.getRoleName() + "' has " + "successfully been"
                             + " added").build();
         } catch (UserStoreException e) {
-            String msg = "Error occurred while adding role '" + roleInfo.getRoleName() + "'";
-            log.error(msg, e);
-            return Response.serverError().entity(
-                    new ErrorResponse.ErrorResponseBuilder().setMessage(msg).build()).build();
+            String errorCode = "";
+            String errorMessage = e.getMessage();
+            if (errorMessage != null && !errorMessage.isEmpty() &&
+                    errorMessage.contains(ErrorMessages.ERROR_CODE_ROLE_ALREADY_EXISTS.getCode())) {
+                errorCode = e.getMessage().split("-")[0].trim();
+            }
+            if (ErrorMessages.ERROR_CODE_ROLE_ALREADY_EXISTS.getCode().equals(errorCode)) {
+                String roleName = roleInfo.getRoleName().split("/")[1];
+                String msg = "Role already exists with name " + roleName + ".";
+                log.warn(msg);
+                return Response.status(Response.Status.CONFLICT).entity(msg).build();
+            } else {
+                String msg = "Error occurred while adding role '" + roleInfo.getRoleName() + "'";
+                log.error(msg, e);
+                return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
+            }
         } catch (URISyntaxException e) {
             String msg = "Error occurred while composing the URI at which the information of the newly created role " +
                     "can be retrieved";
             log.error(msg, e);
-            return Response.serverError().entity(
-                    new ErrorResponse.ErrorResponseBuilder().setMessage(msg).build()).build();
+            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
         } catch (UnsupportedEncodingException e) {
             String msg = "Error occurred while encoding role name";
             log.error(msg, e);
-            return Response.serverError().entity(
-                    new ErrorResponse.ErrorResponseBuilder().setMessage(msg).build()).build();
+            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
         }
     }
 

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/GroupManagementProviderServiceImpl.java

@@ -47,6 +47,7 @@ import org.wso2.carbon.device.mgt.common.exceptions.DeviceManagementException;
 import org.wso2.carbon.device.mgt.common.exceptions.DeviceNotFoundException;
 import org.wso2.carbon.device.mgt.common.GroupPaginationRequest;
 import org.wso2.carbon.device.mgt.common.PaginationResult;
+import org.wso2.carbon.device.mgt.common.exceptions.TrackerAlreadyExistException;
 import org.wso2.carbon.device.mgt.common.exceptions.TransactionManagementException;
 import org.wso2.carbon.device.mgt.common.group.mgt.DeviceGroup;
 import org.wso2.carbon.device.mgt.common.group.mgt.DeviceGroupConstants;
@@ -140,12 +141,15 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
                 if (HttpReportingUtil.isTrackerEnabled()){
                     existingGroup = this.groupDAO.getGroup(deviceGroup.getName(), tenantId);
                     int groupId = existingGroup.getGroupId();
-                    DeviceManagementDataHolder.getInstance().getDeviceAPIClientService()
-                            .addGroup(deviceGroup, groupId, tenantId);
+                    try {
+                        DeviceManagementDataHolder.getInstance().getDeviceAPIClientService()
+                                .addGroup(deviceGroup, groupId, tenantId);
+                    } catch (TrackerAlreadyExistException e) {
+                        throw new GroupAlreadyExistException("Group exist with name " + deviceGroup.getName());
+                    }
+                } else {
+                    throw new GroupAlreadyExistException("Group exist with name " + deviceGroup.getName());
                 }
-                // add a group if not exist in traccar starts
-
-                throw new GroupAlreadyExistException("Group exist with name " + deviceGroup.getName());
             }
         } catch (GroupManagementDAOException e) {
             GroupManagementDAOFactory.rollbackTransaction();

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/traccar/api/service/TraccarClientFactory.java

@@ -648,7 +648,7 @@ public class TraccarClientFactory {
             TrackerManagementDAOFactory.openConnection();
             trackerGroupInfo = trackerDAO.getTrackerGroup(groupId, tenantId);
             if (trackerGroupInfo != null) {
-                String msg = "The group already exit";
+                String msg = "The group already exists in Traccar.";
                 log.error(msg);
                 throw new TrackerAlreadyExistException(msg);
             }

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/traccar/api/service/addons/TraccarClientImpl.java

@@ -555,7 +555,7 @@ public class TraccarClientImpl implements TraccarClient {
             TrackerManagementDAOFactory.openConnection();
             trackerGroupInfo = trackerDAO.getTrackerGroup(groupId, tenantId);
             if (trackerGroupInfo != null) {
-                String msg = "The group already exit";
+                String msg = "The group already exists in Traccar.";
                 log.error(msg);
                 throw new TrackerAlreadyExistException(msg);
             }