Merge pull request 'Add device deletion scenario for billing' (#226) from osh.silva/device-mgt-core:billing-delete-9713 into master

Reviewed-on: community/device-mgt-core#226

components/device-mgt/io.entgra.device.mgt.core.device.mgt.common/src/main/java/io/entgra/device/mgt/core/device/mgt/common/EnrolmentInfo.java

@@ -32,7 +32,7 @@ public class EnrolmentInfo implements Serializable {
     public enum Status {
         CREATED, ACTIVE, INACTIVE, UNREACHABLE, UNCLAIMED, SUSPENDED, BLOCKED, REMOVED, DISENROLLMENT_REQUESTED,
         CONFIGURED, READY_TO_CONNECT, RETURN_PENDING, RETURNED, DEFECTIVE, WARRANTY_PENDING, WARRANTY_SENT,
-        WARRANTY_REPLACED, ASSIGNED
+        WARRANTY_REPLACED, ASSIGNED, DELETED
     }
 
     public enum OwnerShip {

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/dao/DeviceDAO.java

@@ -634,7 +634,7 @@ public interface DeviceDAO {
      * @param enrollmentIds list of enrollment ids.
      * @throws DeviceManagementDAOException when no enrolments are found for the given device.
      */
-    void deleteDevices(List<String> deviceIdentifiers, List<Integer> deviceIds, List<Integer> enrollmentIds) throws DeviceManagementDAOException;
+    void deleteDevices(List<String> deviceIdentifiers, List<Integer> deviceIds, List<Integer> enrollmentIds, List<Device> validDevices) throws DeviceManagementDAOException;
 
     boolean transferDevice(String deviceType, String deviceId, String owner, int destinationTenantId)
             throws DeviceManagementDAOException, SQLException;

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/dao/impl/AbstractDeviceDAOImpl.java

@@ -52,6 +52,7 @@ import java.util.Date;
 import java.util.List;
 import java.util.Map;
 import java.util.StringJoiner;
+import java.util.Random;
 
 public abstract class AbstractDeviceDAOImpl implements DeviceDAO {
 
@@ -2155,7 +2156,7 @@ public abstract class AbstractDeviceDAOImpl implements DeviceDAO {
     }
 
     @Override
-    public void deleteDevices(List<String> deviceIdentifiers, List<Integer> deviceIds, List<Integer> enrollmentIds)
+    public void deleteDevices(List<String> deviceIdentifiers, List<Integer> deviceIds, List<Integer> enrollmentIds, List<Device> validDevices)
             throws DeviceManagementDAOException {
         Connection conn;
         try {
@@ -2210,7 +2211,8 @@ public abstract class AbstractDeviceDAOImpl implements DeviceDAO {
                             "operation response, enrollment operation mapping data of " +
                             "devices with identifiers:  " + deviceIdentifiers);
                 }
-                removeDeviceEnrollment(conn, deviceIds);
+                refactorEnrolment(conn, deviceIds);
+                refactorDeviceStatus(conn, validDevices);
                 if (log.isDebugEnabled()) {
                     log.debug("Successfully removed device enrollment data of devices: " + deviceIdentifiers);
                 }
@@ -2218,7 +2220,7 @@ public abstract class AbstractDeviceDAOImpl implements DeviceDAO {
                 if (log.isDebugEnabled()) {
                     log.debug("Successfully removed device group mapping data of devices: " + deviceIdentifiers);
                 }
-                removeDevice(conn, deviceIds);
+                refactorDevice(conn, deviceIds);
                 if (log.isDebugEnabled()) {
                     log.debug("Successfully permanently deleted the device of devices: " + deviceIdentifiers);
                 }
@@ -2750,73 +2752,138 @@ public abstract class AbstractDeviceDAOImpl implements DeviceDAO {
     }
 
     /***
-     * This method removes records of a given list of enrollments from the DM_ENROLMENT table
+     * This method removes records of a given list of devices from the DM_DEVICE_GROUP_MAP table
      * @param conn Connection object
-     * @param enrollmentIds list of enrollment ids (primary keys)
+     * @param deviceIds list of device ids (primary keys)
      * @throws DeviceManagementDAOException if deletion fails
      */
-    private void removeDeviceEnrollment(Connection conn, List<Integer> enrollmentIds)
+    private void removeDeviceGroupMapping(Connection conn, List<Integer> deviceIds) throws DeviceManagementDAOException {
-            throws DeviceManagementDAOException {
+        String sql = "DELETE FROM DM_DEVICE_GROUP_MAP WHERE DEVICE_ID = ?";
-        String sql = "DELETE FROM DM_ENROLMENT WHERE DEVICE_ID = ?";
         try {
-            if (!executeBatchOperation(conn, sql, enrollmentIds)) {
+            if (!executeBatchOperation(conn, sql, deviceIds)) {
-                String msg = "Failed to remove enrollments of devices with enrollmentIds : " + enrollmentIds
+                String msg = "Failed to remove device group mapping of devices with deviceIds : " + deviceIds
                         + " while executing batch operation";
                 log.error(msg);
                 throw new DeviceManagementDAOException(msg);
             }
         } catch (SQLException e) {
-            String msg = "SQL error occurred while removing enrollments of devices with enrollmentIds : "
+            String msg = "SQL error occurred while removing device group mapping of devices with deviceIds : "
-                    + enrollmentIds;
+                    + deviceIds;
             log.error(msg, e);
             throw new DeviceManagementDAOException(msg, e);
         }
     }
 
     /***
-     * This method removes records of a given list of devices from the DM_DEVICE_GROUP_MAP table
+     * This method refactors some attributes of a given list of devices which are being deleted by the user
      * @param conn Connection object
      * @param deviceIds list of device ids (primary keys)
-     * @throws DeviceManagementDAOException if deletion fails
+     * @throws DeviceManagementDAOException if refactoring fails
      */
-    private void removeDeviceGroupMapping(Connection conn, List<Integer> deviceIds) throws DeviceManagementDAOException {
+    public void refactorDevice(Connection conn, List<Integer> deviceIds) throws DeviceManagementDAOException {
-        String sql = "DELETE FROM DM_DEVICE_GROUP_MAP WHERE DEVICE_ID = ?";
+        String updateQuery = "UPDATE DM_DEVICE SET DEVICE_IDENTIFICATION = ?, NAME = ? WHERE ID = ?";
-        try {
+
-            if (!executeBatchOperation(conn, sql, deviceIds)) {
+        try (PreparedStatement preparedStatement = conn.prepareStatement(updateQuery)) {
-                String msg = "Failed to remove device group mapping of devices with deviceIds : " + deviceIds
+            for (int deviceId : deviceIds) {
-                        + " while executing batch operation";
+
-                log.error(msg);
+                String randomIdentification = generateRandomString(10);
-                throw new DeviceManagementDAOException(msg);
+                String randomName = generateRandomString(20);
+
+                preparedStatement.setString(1, randomIdentification);
+                preparedStatement.setString(2, randomName);
+                preparedStatement.setInt(3, deviceId);
+
+                preparedStatement.executeUpdate();
             }
+
         } catch (SQLException e) {
-            String msg = "SQL error occurred while removing device group mapping of devices with deviceIds : "
+            String msg = "SQL error occurred while refactoring device properties of deviceIds: " + deviceIds;
-                    + deviceIds;
             log.error(msg, e);
             throw new DeviceManagementDAOException(msg, e);
         }
     }
 
+
     /***
-     * This method removes records of a given list of devices from the DM_DEVICE table
+     * This method refactors some attributes of a given list of devices in the DM_ENROLMENT table
      * @param conn Connection object
      * @param deviceIds list of device ids (primary keys)
-     * @throws DeviceManagementDAOException if deletion fails
+     * @throws DeviceManagementDAOException if refactoring fails
      */
-    private void removeDevice(Connection conn, List<Integer> deviceIds) throws DeviceManagementDAOException {
+    public void refactorEnrolment(Connection conn, List<Integer> deviceIds) throws DeviceManagementDAOException {
-        String sql = "DELETE FROM DM_DEVICE WHERE ID = ?";
+        String updateQuery = "UPDATE DM_ENROLMENT SET OWNER = ?, OWNERSHIP = ?, STATUS = ? WHERE DEVICE_ID = ?";
-        try {
+
-            if (!executeBatchOperation(conn, sql, deviceIds)) {
+        try (PreparedStatement preparedStatement = conn.prepareStatement(updateQuery)) {
-                String msg = "Failed to remove devices with deviceIds : " + deviceIds + " while executing batch operation";
+            for (int deviceId : deviceIds) {
-                log.error(msg);
+
-                throw new DeviceManagementDAOException(msg);
+                String randomOwner = generateRandomString(4);
+                String randomOwnership = generateRandomString(6);
+
+                preparedStatement.setString(1, randomOwner);
+                preparedStatement.setString(2, randomOwnership);
+                preparedStatement.setString(3, String.valueOf(Status.DELETED));
+                preparedStatement.setInt(4, deviceId);
+
+                preparedStatement.executeUpdate();
             }
+
         } catch (SQLException e) {
-            String msg = "SQL error occurred while removing devices with deviceIds : " + deviceIds;
+            String msg = "SQL error occurred while refactoring device enrolment properties of deviceIds: " + deviceIds;
             log.error(msg, e);
             throw new DeviceManagementDAOException(msg, e);
         }
     }
 
+    /***
+     * This method updates the status of a given list of devices to DELETED state in the DM_DEVICE_STATUS table
+     * @param conn Connection object
+     * @param validDevices list of devices
+     * @throws DeviceManagementDAOException if updating fails
+     */
+    public void refactorDeviceStatus(Connection conn, List<Device> validDevices) throws DeviceManagementDAOException {
+        String updateQuery = "UPDATE DM_DEVICE_STATUS SET STATUS = ? WHERE ID = ?";
+        String selectLastMatchingRecordQuery = "SELECT ID FROM DM_DEVICE_STATUS WHERE ENROLMENT_ID = ? AND DEVICE_ID = ? ORDER BY ID DESC LIMIT 1";
+
+        try (PreparedStatement selectStatement = conn.prepareStatement(selectLastMatchingRecordQuery);
+             PreparedStatement updateStatement = conn.prepareStatement(updateQuery)) {
+
+            for (Device device : validDevices) {
+
+                selectStatement.setInt(1, device.getEnrolmentInfo().getId());
+                selectStatement.setInt(2, device.getId());
+
+                ResultSet resultSet = selectStatement.executeQuery();
+                int lastRecordId = 0;
+                if (resultSet.next()) {
+                    lastRecordId = resultSet.getInt("ID");
+                }
+
+                updateStatement.setString(1, String.valueOf(Status.DELETED));
+                updateStatement.setInt(2, lastRecordId);
+                updateStatement.execute();
+            }
+
+        } catch (SQLException e) {
+            String msg = "SQL error occurred while updating device status properties.";
+            log.error(msg, e);
+            throw new DeviceManagementDAOException(msg, e);
+        }
+    }
+
+    private String generateRandomString(int length) {
+        String characters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+        StringBuilder randomString = new StringBuilder();
+
+        Random random = new Random();
+
+        for (int i = 0; i < length; i++) {
+            int index = random.nextInt(characters.length());
+            randomString.append(characters.charAt(index));
+        }
+
+        return randomString.toString();
+    }
+
     /***
      * This method executes batch operations for a given list of primary keys
      * where the statement only has one param of type int, following the given pattern:

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/dao/impl/DeviceStatusDAOImpl.java

@@ -54,7 +54,7 @@ public class DeviceStatusDAOImpl implements DeviceStatusDAO {
       }
 
       if (billingStatus) {
-        sql += " ORDER BY UPDATE_TIME DESC";
+        sql += " ORDER BY ID DESC";
       }
 
       stmt = conn.prepareStatement(sql);

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/dao/impl/device/GenericDeviceDAOImpl.java

@@ -237,7 +237,7 @@ public class GenericDeviceDAOImpl extends AbstractDeviceDAOImpl {
                     "WHERE " +
                     "e.TENANT_ID=? AND " +
                     "d.ID=e.DEVICE_ID AND " +
-                    "STATUS !='REMOVED' AND " +
+                    "STATUS NOT IN ('REMOVED', 'DELETED') AND " +
                     "(" +
                     "DATE_OF_ENROLMENT BETWEEN ? AND ? " +
                     ")";
@@ -276,7 +276,9 @@ public class GenericDeviceDAOImpl extends AbstractDeviceDAOImpl {
                     "from DM_DEVICE d, DM_ENROLMENT e " +
                     "where " +
                     "e.TENANT_ID=? and d.ID=e.DEVICE_ID and " +
-                    "STATUS ='REMOVED' and " +
+                    "(" +
+                    "STATUS = 'REMOVED' OR STATUS = 'DELETED' " +
+                    ") and "  +
                     "(" +
                     "DATE_OF_ENROLMENT between ? and ? " +
                     ") and " +
@@ -319,7 +321,7 @@ public class GenericDeviceDAOImpl extends AbstractDeviceDAOImpl {
                     "where " +
                     "e.TENANT_ID=? and " +
                     "d.ID=e.DEVICE_ID and " +
-                    "STATUS !='REMOVED' and " +
+                    "STATUS NOT IN ('REMOVED', 'DELETED') and " +
                     "(" +
                     "DATE_OF_ENROLMENT < ? " +
                     ")";
@@ -358,7 +360,9 @@ public class GenericDeviceDAOImpl extends AbstractDeviceDAOImpl {
                     "from DM_DEVICE d, DM_ENROLMENT e " +
                     "where " +
                     "e.TENANT_ID=? and d.ID=e.DEVICE_ID and " +
-                    "STATUS ='REMOVED' and " +
+                    "(" +
+                    "STATUS = 'REMOVED' OR STATUS = 'DELETED' " +
+                    ") and "  +
                     "(" +
                     "DATE_OF_ENROLMENT < ? " +
                     ") and " +

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/service/DeviceManagementProviderServiceImpl.java

@@ -652,6 +652,7 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
         Map<String, DeviceManager> deviceManagerMap = new HashMap<>();
         List<DeviceCacheKey> deviceCacheKeyList = new ArrayList<>();
         List<Device> existingDevices;
+        List<Device> validDevices = new ArrayList<>();;
         int tenantId = this.getTenantId();
 
         try {
@@ -684,6 +685,7 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
             deviceCacheKey.setDeviceType(device.getType());
             deviceCacheKey.setTenantId(tenantId);
             deviceCacheKeyList.add(deviceCacheKey);
+            validDevices.add(device);
             deviceIds.add(device.getId());
             validDeviceIdentifiers.add(device.getDeviceIdentifier());
             enrollmentIds.add(device.getEnrolmentInfo().getId());
@@ -713,7 +715,7 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
         try {
             DeviceManagementDAOFactory.beginTransaction();
             //deleting device from the core
-            deviceDAO.deleteDevices(validDeviceIdentifiers, new ArrayList<>(deviceIds), enrollmentIds);
+            deviceDAO.deleteDevices(validDeviceIdentifiers, new ArrayList<>(deviceIds), enrollmentIds, validDevices);
             for (Map.Entry<String, DeviceManager> entry : deviceManagerMap.entrySet()) {
                 try {
                     // deleting device from the plugin level
@@ -1032,7 +1034,7 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
      * @return Whether status is changed or not
      * @throws DeviceManagementException on errors while trying to calculate Cost
      */
-    public BillingResponse calculateCost(String tenantDomain, Timestamp startDate, Timestamp endDate, List<Device> allDevices) throws MetadataManagementDAOException, DeviceManagementException {
+    public BillingResponse calculateUsage(String tenantDomain, Timestamp startDate, Timestamp endDate, List<Device> allDevices) throws MetadataManagementDAOException, DeviceManagementException {
 
         BillingResponse billingResponse = new BillingResponse();
         List<Device> deviceStatusNotAvailable = new ArrayList<>();
@@ -1045,31 +1047,73 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
 
             Gson g = new Gson();
             Collection<Cost> costData = null;
+            int tenantIdContext = CarbonContext.getThreadLocalCarbonContext().getTenantId();
 
             Type collectionType = new TypeToken<Collection<Cost>>() {
             }.getType();
-            if (metadata != null) {
+            if (tenantIdContext == MultitenantConstants.SUPER_TENANT_ID && metadata != null) {
                 costData = g.fromJson(metadata.getMetaValue(), collectionType);
                 for (Cost tenantCost : costData) {
                     if (tenantCost.getTenantDomain().equals(tenantDomain)) {
+                        totalCost = generateCost(allDevices, startDate, endDate, tenantCost, deviceStatusNotAvailable, totalCost);
+                    }
+                }
+            } else {
+                totalCost = generateCost(allDevices, startDate, endDate, null, deviceStatusNotAvailable, totalCost);
+            }
+        } catch (DeviceManagementException e) {
+            String msg = "Error occurred calculating cost of devices";
+            log.error(msg, e);
+            throw new DeviceManagementException(msg, e);
+        } catch (MetadataManagementException e) {
+            String msg = "Error when retrieving metadata of billing feature";
+            log.error(msg, e);
+            throw new DeviceManagementException(msg, e);
+        }
+
+        if (!deviceStatusNotAvailable.isEmpty()) {
+            allDevices.removeAll(deviceStatusNotAvailable);
+        }
+
+        Calendar calStart = Calendar.getInstance();
+        Calendar calEnd = Calendar.getInstance();
+        calStart.setTimeInMillis(startDate.getTime());
+        calEnd.setTimeInMillis(endDate.getTime());
+
+        billingResponse.setDevice(allDevices);
+        billingResponse.setYear(String.valueOf(calStart.get(Calendar.YEAR)));
+        billingResponse.setStartDate(startDate.toString());
+        billingResponse.setEndDate(endDate.toString());
+        billingResponse.setBillPeriod(calStart.get(Calendar.YEAR) + " - " + calEnd.get(Calendar.YEAR));
+        billingResponse.setTotalCostPerYear(Math.round(totalCost * 100.0) / 100.0);
+        billingResponse.setDeviceCount(allDevices.size());
+
+        return billingResponse;
+    }
+
+    public double generateCost(List<Device> allDevices, Timestamp startDate, Timestamp endDate,  Cost tenantCost, List<Device> deviceStatusNotAvailable, double totalCost) throws DeviceManagementException {
         for (Device device : allDevices) {
             long dateDiff = 0;
             device.setDeviceStatusInfo(getDeviceStatusHistory(device, null, endDate, true));
             List<DeviceStatus> deviceStatus = device.getDeviceStatusInfo();
             if (device.getEnrolmentInfo().getDateOfEnrolment() < startDate.getTime()) {
-                                if (!deviceStatus.isEmpty() && String.valueOf(deviceStatus.get(0).getStatus()).equals("REMOVED")) {
+                if (!deviceStatus.isEmpty() && (String.valueOf(deviceStatus.get(0).getStatus()).equals("REMOVED")
+                        || String.valueOf(deviceStatus.get(0).getStatus()).equals("DELETED"))) {
                     if (deviceStatus.get(0).getUpdateTime().getTime() >= startDate.getTime()) {
                         dateDiff = deviceStatus.get(0).getUpdateTime().getTime() - startDate.getTime();
                     }
-                                } else if (!deviceStatus.isEmpty() && !String.valueOf(deviceStatus.get(0).getStatus()).equals("REMOVED")) {
+                } else if (!deviceStatus.isEmpty() && (!String.valueOf(deviceStatus.get(0).getStatus()).equals("REMOVED")
+                        && !String.valueOf(deviceStatus.get(0).getStatus()).equals("DELETED"))) {
                     dateDiff = endDate.getTime() - startDate.getTime();
                 }
             } else {
-                                if (!deviceStatus.isEmpty() && String.valueOf(deviceStatus.get(0).getStatus()).equals("REMOVED")) {
+                if (!deviceStatus.isEmpty() && (String.valueOf(deviceStatus.get(0).getStatus()).equals("REMOVED")
+                        || String.valueOf(deviceStatus.get(0).getStatus()).equals("DELETED"))) {
                     if (deviceStatus.get(0).getUpdateTime().getTime() >= device.getEnrolmentInfo().getDateOfEnrolment()) {
                         dateDiff = deviceStatus.get(0).getUpdateTime().getTime() - device.getEnrolmentInfo().getDateOfEnrolment();
                     }
-                                } else if (!deviceStatus.isEmpty() && !String.valueOf(deviceStatus.get(0).getStatus()).equals("REMOVED")) {
+                } else if (!deviceStatus.isEmpty() && (!String.valueOf(deviceStatus.get(0).getStatus()).equals("REMOVED")
+                        && !String.valueOf(deviceStatus.get(0).getStatus()).equals("DELETED"))) {
                     dateDiff = endDate.getTime() - device.getEnrolmentInfo().getDateOfEnrolment();
                 }
             }
@@ -1082,7 +1126,10 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
             }
 
             long dateInDays = (long) dateDiffInDays;
-                            double cost = (tenantCost.getCost() / 365) * dateInDays;
+            double cost = 0;
+            if (tenantCost != null) {
+                cost = (tenantCost.getCost() / 365) * dateInDays;
+            }
             totalCost += cost;
             device.setCost(Math.round(cost * 100.0) / 100.0);
             long totalDays = dateInDays + device.getDaysUsed();
@@ -1091,38 +1138,7 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
                 deviceStatusNotAvailable.add(device);
             }
         }
-
+        return totalCost;
-                    }
-                }
-            }
-        } catch (DeviceManagementException e) {
-            String msg = "Error occurred calculating cost of devices";
-            log.error(msg, e);
-            throw new DeviceManagementException(msg, e);
-        } catch (MetadataManagementException e) {
-            String msg = "Error when retrieving metadata of billing feature";
-            log.error(msg, e);
-            throw new DeviceManagementException(msg, e);
-        }
-
-        if (!deviceStatusNotAvailable.isEmpty()) {
-            allDevices.removeAll(deviceStatusNotAvailable);
-        }
-
-        Calendar calStart = Calendar.getInstance();
-        Calendar calEnd = Calendar.getInstance();
-        calStart.setTimeInMillis(startDate.getTime());
-        calEnd.setTimeInMillis(endDate.getTime());
-
-        billingResponse.setDevice(allDevices);
-        billingResponse.setYear(String.valueOf(calStart.get(Calendar.YEAR)));
-        billingResponse.setStartDate(startDate.toString());
-        billingResponse.setEndDate(endDate.toString());
-        billingResponse.setBillPeriod(calStart.get(Calendar.YEAR) + " - " + calEnd.get(Calendar.YEAR));
-        billingResponse.setTotalCostPerYear(Math.round(totalCost * 100.0) / 100.0);
-        billingResponse.setDeviceCount(allDevices.size());
-
-        return billingResponse;
     }
 
     @Override
@@ -1186,7 +1202,7 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
                     // The query returns devices which are enrolled prior this year now in removed state
                     allDevicesPerYear.addAll(deviceDAO.getRemovedPriorYearsDeviceList(tenantId, newStartDate, newEndDate));
 
-                    BillingResponse billingResponse = calculateCost(tenantDomain, newStartDate, newEndDate, allDevicesPerYear);
+                    BillingResponse billingResponse = calculateUsage(tenantDomain, newStartDate, newEndDate, allDevicesPerYear);
                     billingResponseList.add(billingResponse);
                     allDevices.addAll(billingResponse.getDevice());
                     totalCost = totalCost + billingResponse.getTotalCostPerYear();
@@ -1210,7 +1226,7 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
                     // The query returns devices which are enrolled prior this year now in removed state
                     allDevicesPerRemainingDays.addAll(deviceDAO.getRemovedPriorYearsDeviceList(tenantId, startDate, endDate));
 
-                    BillingResponse billingResponse = calculateCost(tenantDomain, startDate, endDate, allDevicesPerRemainingDays);
+                    BillingResponse billingResponse = calculateUsage(tenantDomain, startDate, endDate, allDevicesPerRemainingDays);
                     billingResponseList.add(billingResponse);
                     allDevices.addAll(billingResponse.getDevice());
                     totalCost = totalCost + billingResponse.getTotalCostPerYear();