@Override
  public BaseResult deactivateInstance(String instanceId, User requestingUser) {
    logger.info("Deactivate instance {}.", instanceId);
    ServiceInstance instance = null;

    try {

      instance = instanceDAO.getInstanceById(instanceId);

      checkInstanceAvailability(instance);

      final APPlatformController controller =
          APPlatformControllerFactory.getInstance(instance.getControllerId());
      final ProvisioningSettings settings =
          configService.getProvisioningSettings(instance, UserMapper.toServiceUser(requestingUser));

      // Forward request
      final InstanceStatus status =
          controller.deactivateInstance(instance.getInstanceId(), settings);
      if (status != null) {
        // forward call to provisioning service on application instance
        if (status.isInstanceProvisioningRequested()) {
          final ProvisioningService provisioning = provisioningFactory.getInstance(instance);
          final BaseResult result = provisioning.deactivateInstance(instanceId, requestingUser);
          if (provResult.isError(result)) {
            return result;
          }
        }

        // If everything worked well we will save all changed parameters
        instance.setInstanceParameters(status.getChangedParameters());
      }

      // Update current state
      instance.setProvisioningStatus(ProvisioningStatus.WAITING_FOR_SYSTEM_DEACTIVATION);
      em.persist(instance);

      timerService.initTimers();

      return provResult.newOkBaseResult();

    } catch (Exception e) {
      logger.warn(e.getMessage(), e);
      return provResult.getErrorResult(
          BaseResult.class, e, getLocale(requestingUser), instance, instanceId);
    }
  }
  private BaseResult modifySubscription(
      String instanceId,
      String subscriptionId,
      List<ServiceParameter> parameterValues,
      final HashMap<String, String> parameterMap,
      ProvisioningStatus targetStatus,
      User requestingUser) {

    ServiceInstance instance = null;

    try {
      instance = instanceDAO.getInstanceById(instanceId);

      instance.prepareRollback();

      checkInstanceAvailability(instance);

      final HashMap<String, String> controllerSettings =
          configService.getControllerConfigurationSettings(instance.getControllerId());
      final APPlatformController controller =
          APPlatformControllerFactory.getInstance(instance.getControllerId());

      final ProvisioningSettings currentSettings =
          configService.getProvisioningSettings(instance, UserMapper.toServiceUser(requestingUser));
      final ProvisioningSettings newSettings =
          new ProvisioningSettings(parameterMap, controllerSettings, instance.getDefaultLocale());
      newSettings.setAuthentication(currentSettings.getAuthentication());
      configService.copyCredentialsFromControllerSettings(newSettings, controllerSettings);
      newSettings.setRequestingUser(UserMapper.toServiceUser(requestingUser));
      newSettings.setSubscriptionId(subscriptionId);

      // Forward modification request
      final InstanceStatus status =
          controller.modifyInstance(instance.getInstanceId(), currentSettings, newSettings);
      if (status != null) {
        // forward call to provisioning service on application instance
        if (status.isInstanceProvisioningRequested()) {
          final ProvisioningService provisioning = provisioningFactory.getInstance(instance);
          final List<ServiceParameter> filteredParameters =
              InstanceParameterFilter.getFilteredInstanceParametersForService(parameterValues);
          final BaseResult result =
              provisioning.modifySubscription(
                  instanceId, subscriptionId, filteredParameters, requestingUser);
          if (provResult.isError(result)) {
            return result;
          }
        }

        // If everything worked well we will save all changed parameters
        instance.setInstanceParameters(status.getChangedParameters());
      }

      instance.setProvisioningStatus(targetStatus);
      instance.setSubscriptionId(subscriptionId);
      em.persist(instance);

      timerService.initTimers();

      return provResult.newOkBaseResult();
    } catch (Exception e) {
      logger.warn(e.getMessage(), e);
      return provResult.getErrorResult(
          BaseResult.class, e, getLocale(requestingUser), instance, instanceId);
    }
  }