Merge branch 'billing-api-1226' into 'master'

Adding the new billing API

See merge request entgra/carbon-device-mgt!848

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/beans/DeviceList.java

@@ -29,6 +29,15 @@ public class DeviceList extends BasePaginatedResult {
 
     private List<Device> devices = new ArrayList<>();
 
+    @ApiModelProperty(name = "totalCost", value = "Total cost of all devices per tenant", required = false)
+    private double totalCost;
+
+    @ApiModelProperty(name = "message", value = "Send information text to the billing UI", required = false)
+    private String message;
+
+    @ApiModelProperty(name = "billedDateIsValid", value = "Check if user entered date is valid", required = false)
+    private boolean billedDateIsValid;
+
     @ApiModelProperty(value = "List of devices returned")
     @JsonProperty("devices")
     public List<Device> getList() {
@@ -39,6 +48,30 @@ public class DeviceList extends BasePaginatedResult {
         this.devices = devices;
     }
 
+    public boolean isBilledDateIsValid() {
+        return billedDateIsValid;
+    }
+
+    public void setBilledDateIsValid(boolean billedDateIsValid) {
+        this.billedDateIsValid = billedDateIsValid;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public double getTotalCost() {
+        return totalCost;
+    }
+
+    public void setTotalCost(double totalCost) {
+        this.totalCost = totalCost;
+    }
+
     @Override
     public String toString() {
         StringBuilder sb = new StringBuilder();

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

@@ -81,6 +81,7 @@ import javax.ws.rs.Produces;
 import javax.ws.rs.QueryParam;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
+import java.sql.Timestamp;
 import java.util.List;
 
 /**
@@ -343,6 +344,171 @@ public interface DeviceManagementService {
             @QueryParam("limit")
                     int limit);
 
+
+    @GET
+    @Path("/billing")
+    @Produces(MediaType.APPLICATION_JSON)
+    @ApiOperation(
+            produces = MediaType.APPLICATION_JSON,
+            httpMethod = "GET",
+            value = "Getting Cost details of devices in a tenant",
+            notes = "Provides individual cost and total cost of all devices per tenant.",
+            tags = "Device Management",
+            extensions = {
+                    @Extension(properties = {
+                            @ExtensionProperty(name = Constants.SCOPE, value = "perm:devices:view")
+                    })
+            }
+    )
+    @ApiResponses(value = {
+            @ApiResponse(code = 200, message = "OK. \n Successfully fetched the list of devices.",
+                    response = DeviceList.class,
+                    responseHeaders = {
+                            @ResponseHeader(
+                                    name = "Content-Type",
+                                    description = "The content type of the body"),
+                            @ResponseHeader(
+                                    name = "ETag",
+                                    description = "Entity Tag of the response resource.\n" +
+                                            "Used by caches, or in conditional requests."),
+                            @ResponseHeader(
+                                    name = "Last-Modified",
+                                    description = "Date and time the resource was last modified.\n" +
+                                            "Used by caches, or in conditional requests."),
+                    }),
+            @ApiResponse(
+                    code = 304,
+                    message = "Not Modified. \n Empty body because the client already has the latest version of " +
+                            "the requested resource.\n"),
+            @ApiResponse(
+                    code = 400,
+                    message = "The incoming request has more than one selection criteria defined via the query parameters.",
+                    response = ErrorResponse.class),
+            @ApiResponse(
+                    code = 404,
+                    message = "The search criteria did not match any device registered with the server.",
+                    response = ErrorResponse.class),
+            @ApiResponse(
+                    code = 406,
+                    message = "Not Acceptable.\n The requested media type is not supported."),
+            @ApiResponse(
+                    code = 500,
+                    message = "Internal Server Error. \n Server error occurred while fetching the device list.",
+                    response = ErrorResponse.class)
+    })
+    Response getDevicesBilling(
+            @ApiParam(
+                    name = "tenantDomain",
+                    value = "The tenant domain.",
+                    required = false)
+                    String tenantDomain,
+            @ApiParam(
+                    name = "startDate",
+                    value = "The start date.",
+                    required = false)
+                    Timestamp startDate,
+            @ApiParam(
+                    name = "endDate",
+                    value = "The end date.",
+                    required = false)
+                    Timestamp endDate,
+            @ApiParam(
+                    name = "generateBill",
+                    value = "The generate bill boolean.",
+                    required = false)
+                    boolean generateBill,
+            @ApiParam(
+                    name = "offset",
+                    value = "The starting pagination index for the complete list of qualified items.",
+                    required = false,
+                    defaultValue = "0")
+            @QueryParam("offset")
+                    int offset,
+            @ApiParam(
+                    name = "limit",
+                    value = "Provide how many device details you require from the starting pagination index/offset.",
+                    required = false,
+                    defaultValue = "10")
+            @QueryParam("limit")
+                    int limit);
+
+
+    @GET
+    @Path("/billing/file")
+    @Produces(MediaType.APPLICATION_JSON)
+    @ApiOperation(
+            produces = MediaType.APPLICATION_JSON,
+            httpMethod = "GET",
+            value = "Getting Cost details of devices in a tenant",
+            notes = "Provides individual cost and total cost of all devices per tenant.",
+            tags = "Device Management",
+            extensions = {
+                    @Extension(properties = {
+                            @ExtensionProperty(name = Constants.SCOPE, value = "perm:devices:view")
+                    })
+            }
+    )
+    @ApiResponses(value = {
+            @ApiResponse(code = 200, message = "OK. \n Successfully fetched the list of devices.",
+                    response = DeviceList.class,
+                    responseHeaders = {
+                            @ResponseHeader(
+                                    name = "Content-Type",
+                                    description = "The content type of the body"),
+                            @ResponseHeader(
+                                    name = "Content-Disposition",
+                                    description = "The content disposition of the body"),
+                            @ResponseHeader(
+                                    name = "ETag",
+                                    description = "Entity Tag of the response resource.\n" +
+                                            "Used by caches, or in conditional requests."),
+                            @ResponseHeader(
+                                    name = "Last-Modified",
+                                    description = "Date and time the resource was last modified.\n" +
+                                            "Used by caches, or in conditional requests."),
+                    }),
+            @ApiResponse(
+                    code = 304,
+                    message = "Not Modified. \n Empty body because the client already has the latest version of " +
+                            "the requested resource.\n"),
+            @ApiResponse(
+                    code = 400,
+                    message = "The incoming request has more than one selection criteria defined via the query parameters.",
+                    response = ErrorResponse.class),
+            @ApiResponse(
+                    code = 404,
+                    message = "The search criteria did not match any device registered with the server.",
+                    response = ErrorResponse.class),
+            @ApiResponse(
+                    code = 406,
+                    message = "Not Acceptable.\n The requested media type is not supported."),
+            @ApiResponse(
+                    code = 500,
+                    message = "Internal Server Error. \n Server error occurred while fetching the device list.",
+                    response = ErrorResponse.class)
+    })
+    Response exportBilling(
+            @ApiParam(
+                    name = "tenantDomain",
+                    value = "The tenant domain.",
+                    required = false)
+                    String tenantDomain,
+            @ApiParam(
+                    name = "startDate",
+                    value = "The start date.",
+                    required = false)
+                    Timestamp startDate,
+            @ApiParam(
+                    name = "endDate",
+                    value = "The end date.",
+                    required = false)
+                    Timestamp endDate,
+            @ApiParam(
+                    name = "generateBill",
+                    value = "The generate bill boolean.",
+                    required = false)
+                    boolean generateBill);
+
     @GET
     @Produces(MediaType.APPLICATION_JSON)
     @ApiOperation(

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

@@ -119,26 +119,17 @@ import org.wso2.carbon.identity.jwt.client.extension.service.JWTClientManagerSer
 import org.wso2.carbon.policy.mgt.common.PolicyManagementException;
 import org.wso2.carbon.policy.mgt.core.PolicyManagerService;
 import org.wso2.carbon.user.api.UserStoreException;
+import org.wso2.carbon.user.core.service.RealmService;
 import org.wso2.carbon.utils.multitenancy.MultitenantUtils;
 
 import javax.validation.Valid;
 import javax.validation.constraints.Size;
-import javax.ws.rs.DELETE;
+import javax.ws.rs.*;
-import javax.ws.rs.GET;
-import javax.ws.rs.HeaderParam;
-import javax.ws.rs.POST;
-import javax.ws.rs.PUT;
-import javax.ws.rs.Path;
-import javax.ws.rs.PathParam;
-import javax.ws.rs.QueryParam;
-import javax.ws.rs.DefaultValue;
 import javax.ws.rs.core.Response;
+import java.sql.Timestamp;
 import java.text.ParseException;
 import java.text.SimpleDateFormat;
-import java.util.Date;
+import java.util.*;
-import java.util.List;
-import java.util.ArrayList;
-import java.util.Properties;
 
 @Path("/devices")
 public class DeviceManagementServiceImpl implements DeviceManagementService {
@@ -214,8 +205,8 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
             }
             if (status != null && !status.isEmpty()) {
                 boolean isStatusEmpty = true;
-                for (String statusString : status){
+                for (String statusString : status) {
-                    if (StringUtils.isNotBlank(statusString)){
+                    if (StringUtils.isNotBlank(statusString)) {
                         isStatusEmpty = false;
                         break;
                     }
@@ -341,6 +332,105 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
         }
     }
 
+    @GET
+    @Override
+    @Path("/billing")
+    public Response getDevicesBilling(
+            @QueryParam("tenantDomain") String tenantDomain,
+            @QueryParam("startDate") Timestamp startDate,
+            @QueryParam("endDate") Timestamp endDate,
+            @QueryParam("generateBill") boolean generateBill,
+            @QueryParam("offset") int offset,
+            @DefaultValue("10")
+            @QueryParam("limit") int limit) {
+        try {
+            RequestValidationUtil.validatePaginationParameters(offset, limit);
+            DeviceManagementProviderService dms = DeviceMgtAPIUtils.getDeviceManagementService();
+            PaginationRequest request = new PaginationRequest(offset, limit);
+            PaginationResult result;
+            DeviceList devices = new DeviceList();
+            int tenantId = 0;
+            RealmService realmService = DeviceMgtAPIUtils.getRealmService();
+
+            if (!tenantDomain.isEmpty()) {
+                tenantId = realmService.getTenantManager().getTenantId(tenantDomain);
+            } else {
+                tenantId = CarbonContext.getThreadLocalCarbonContext().getTenantId();
+            }
+
+            try {
+                result = dms.getAllDevicesBillings(request, tenantId, tenantDomain, startDate, endDate, generateBill);
+            } catch (Exception exception) {
+                String msg = "Error occurred when trying to retrieve billing data";
+                log.error(msg, exception);
+                return Response.serverError().entity(
+                        new ErrorResponse.ErrorResponseBuilder().setMessage(msg).build()).build();
+            }
+
+            int resultCount = result.getRecordsTotal();
+            if (resultCount == 0) {
+                Response.status(Response.Status.OK).entity(devices).build();
+            }
+
+            devices.setList((List<Device>) result.getData());
+            devices.setBilledDateIsValid(result.isBilledDateIsValid());
+            devices.setMessage(result.getMessage());
+            devices.setCount(result.getRecordsTotal());
+            devices.setTotalCost(result.getTotalCost());
+            return Response.status(Response.Status.OK).entity(devices).build();
+        } catch (Exception e) {
+            String msg = "Error occurred while retrieving billing data";
+            log.error(msg, e);
+            return Response.serverError().entity(
+                    new ErrorResponse.ErrorResponseBuilder().setMessage(msg).build()).build();
+        }
+    }
+
+    @GET
+    @Override
+    @Path("/billing/file")
+    public Response exportBilling(
+            @QueryParam("tenantDomain") String tenantDomain,
+            @QueryParam("startDate") Timestamp startDate,
+            @QueryParam("endDate") Timestamp endDate,
+            @QueryParam("generateBill") boolean generateBill) {
+
+        try {
+            DeviceManagementProviderService dms = DeviceMgtAPIUtils.getDeviceManagementService();
+            PaginationResult result;
+            int tenantId = 0;
+            RealmService realmService = DeviceMgtAPIUtils.getRealmService();
+            DeviceList devices = new DeviceList();
+
+            if (!tenantDomain.isEmpty()) {
+                tenantId = realmService.getTenantManager().getTenantId(tenantDomain);
+            } else {
+                tenantId = CarbonContext.getThreadLocalCarbonContext().getTenantId();
+            }
+
+            try {
+                result = dms.createBillingFile(tenantId, tenantDomain, startDate, endDate, generateBill);
+
+            } catch (Exception exception) {
+                String msg = "Error occurred when trying to retrieve billing data without pagination";
+                log.error(msg, exception);
+                return null;
+            }
+
+            devices.setList((List<Device>) result.getData());
+            devices.setBilledDateIsValid(result.isBilledDateIsValid());
+            devices.setMessage(result.getMessage());
+            devices.setCount(result.getRecordsTotal());
+            devices.setTotalCost(result.getTotalCost());
+            return Response.status(Response.Status.OK).entity(devices).build();
+        } catch (Exception e) {
+            String msg = "Error occurred while retrieving billing data without pagination";
+            log.error(msg, e);
+            return null;
+        }
+
+    }
+
     @GET
     @Override
     @Path("/user-devices")
@@ -377,8 +467,8 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
      * Validate group Id and group Id greater than 0 and exist.
      *
      * @param groupId Group ID of the group
-     * @param from time to start getting DeviceLocationHistorySnapshotWrapper in milliseconds
+     * @param from    time to start getting DeviceLocationHistorySnapshotWrapper in milliseconds
-     * @param to time to end getting DeviceLocationHistorySnapshotWrapper in milliseconds
+     * @param to      time to end getting DeviceLocationHistorySnapshotWrapper in milliseconds
      */
     private static void validateGroupId(int groupId, long from, long to) throws GroupManagementException, BadRequestException {
         if (from == 0 || to == 0) {
@@ -407,7 +497,7 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
                                                 @QueryParam("to") long to,
                                                 @QueryParam("type") String type,
                                                 @DefaultValue("0") @QueryParam("offset") int offset,
-                                                @DefaultValue("100") @QueryParam("limit") int limit){
+                                                @DefaultValue("100") @QueryParam("limit") int limit) {
         try {
             RequestValidationUtil.validatePaginationParameters(offset, limit);
             DeviceManagementProviderService dms = DeviceMgtAPIUtils.getDeviceManagementService();
@@ -416,31 +506,31 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
 
             // this is the user who initiates the request
             String authorizedUser = CarbonContext.getThreadLocalCarbonContext().getUsername();
-                try {
+            try {
-                    validateGroupId(groupId, from, to);
+                validateGroupId(groupId, from, to);
-                    boolean isPermitted = DeviceMgtAPIUtils.checkPermission(groupId, authorizedUser);
+                boolean isPermitted = DeviceMgtAPIUtils.checkPermission(groupId, authorizedUser);
-                    if (isPermitted) {
+                if (isPermitted) {
-                        request.setGroupId(groupId);
+                    request.setGroupId(groupId);
-                    } else {
+                } else {
-                        String msg = "Current user '" + authorizedUser
+                    String msg = "Current user '" + authorizedUser
-                                + "' doesn't have enough privileges to list devices of group '"
+                            + "' doesn't have enough privileges to list devices of group '"
-                                + groupId + "'";
+                            + groupId + "'";
-                        log.error(msg);
-                        return Response.status(Response.Status.FORBIDDEN).entity(msg).build();
-                    }
-                } catch (GroupManagementException e) {
-                    String msg = "Error occurred while getting the data using '" + groupId + "'";
                     log.error(msg);
-                    return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
+                    return Response.status(Response.Status.FORBIDDEN).entity(msg).build();
-                } catch (UserStoreException e){
-                    String msg = "Error occurred while retrieving role list of user '" + authorizedUser + "'";
-                    log.error(msg);
-                    return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
                 }
+            } catch (GroupManagementException e) {
+                String msg = "Error occurred while getting the data using '" + groupId + "'";
+                log.error(msg);
+                return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
+            } catch (UserStoreException e) {
+                String msg = "Error occurred while retrieving role list of user '" + authorizedUser + "'";
+                log.error(msg);
+                return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
+            }
 
             PaginationResult result = dms.getAllDevices(request, false);
 
-            if(!result.getData().isEmpty()){
+            if (!result.getData().isEmpty()) {
                 devices.setList((List<Device>) result.getData());
 
                 for (Device device : devices.getList()) {
@@ -548,7 +638,7 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
             DeviceData deviceData = new DeviceData();
             deviceData.setDeviceIdentifier(deviceIdentifier);
 
-            if (!StringUtils.isBlank(ifModifiedSince)){
+            if (!StringUtils.isBlank(ifModifiedSince)) {
                 SimpleDateFormat format = new SimpleDateFormat("EEE, d MMM yyyy HH:mm:ss Z");
                 try {
                     sinceDate = format.parse(ifModifiedSince);
@@ -561,10 +651,10 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
                 }
             }
 
-            if (!StringUtils.isBlank(owner)){
+            if (!StringUtils.isBlank(owner)) {
                 deviceData.setDeviceOwner(owner);
             }
-            if (!StringUtils.isBlank(ownership)){
+            if (!StringUtils.isBlank(ownership)) {
                 deviceData.setDeviceOwnership(ownership);
             }
             device = dms.getDevice(deviceData, true);
@@ -654,7 +744,7 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
                     sinceDate = format.parse(ifModifiedSince);
                 } catch (ParseException e) {
                     String message = "Error occurred while parse the since date.Invalid date string is provided in " +
-                                 "'If-Modified-Since' header";
+                            "'If-Modified-Since' header";
                     log.error(message, e);
                     return Response.status(Response.Status.BAD_REQUEST).entity(
                             new ErrorResponse.ErrorResponseBuilder().setMessage("Invalid date " +
@@ -667,7 +757,7 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
                     String message = "No device is modified after the timestamp provided in 'If-Modified-Since' header";
                     log.error(message);
                     return Response.status(Response.Status.NOT_MODIFIED).entity("No device is modified " +
-                     "after the timestamp provided in 'If-Modified-Since' header").build();
+                            "after the timestamp provided in 'If-Modified-Since' header").build();
                 }
             } else {
                 device = dms.getDevice(id, requireDeviceInfo);
@@ -682,7 +772,7 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
             // check whether the user is authorized
             if (!deviceAccessAuthorizationService.isUserAuthorized(deviceIdentifier, authorizedUser)) {
                 String message = "User '" + authorizedUser + "' is not authorized to retrieve the given " +
-                                 "device id '" + id + "'";
+                        "device id '" + id + "'";
                 log.error(message);
                 return Response.status(Response.Status.UNAUTHORIZED).entity(
                         new ErrorResponse.ErrorResponseBuilder().setCode(401l).setMessage(message).build()).build();
@@ -837,7 +927,7 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
         List<Device> devices;
         DeviceList deviceList = new DeviceList();
         try {
-            if(map.getProperties().isEmpty()){
+            if (map.getProperties().isEmpty()) {
                 if (log.isDebugEnabled()) {
                     log.debug("No search criteria defined when querying devices.");
                 }
@@ -845,7 +935,7 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
             }
             DeviceManagementProviderService dms = DeviceMgtAPIUtils.getDeviceManagementService();
             devices = dms.getDevicesBasedOnProperties(map.getProperties());
-            if(devices == null || devices.isEmpty()){
+            if (devices == null || devices.isEmpty()) {
                 if (log.isDebugEnabled()) {
                     log.debug("No Devices Found for criteria : " + map);
                 }
@@ -1145,14 +1235,14 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
     /**
      * List device status history
      *
-     * @param type       Device type
+     * @param type Device type
-     * @param id         Device id
+     * @param id   Device id
      * @return {@link Response} object
      */
     @GET
     @Path("/{type}/{id}/getstatushistory")
     public Response getDeviceStatusHistory(@PathParam("type") @Size(max = 45) String type,
-                                       @PathParam("id") @Size(max = 45) String id) {
+                                           @PathParam("id") @Size(max = 45) String id) {
         //TODO check authorization for this
         RequestValidationUtil.validateDeviceIdentifier(type, id);
         DeviceManagementProviderService deviceManagementProviderService =
@@ -1177,14 +1267,14 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
     /**
      * List device status history for the current enrolment
      *
-     * @param type       Device type
+     * @param type Device type
-     * @param id         Device id
+     * @param id   Device id
      * @return {@link Response} object
      */
     @GET
     @Path("/{type}/{id}/getenrolmentstatushistory")
     public Response getCurrentEnrolmentDeviceStatusHistory(@PathParam("type") @Size(max = 45) String type,
-                                           @PathParam("id") @Size(max = 45) String id) {
+                                                           @PathParam("id") @Size(max = 45) String id) {
         //TODO check authorization for this or current enrolment should be based on for the enrolment associated with the user
         RequestValidationUtil.validateDeviceIdentifier(type, id);
         DeviceManagementProviderService deviceManagementProviderService =
@@ -1488,7 +1578,7 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
             if (MDMAppConstants.AndroidConstants.OPCODE_INSTALL_APPLICATION.equals(operation.getCode()) ||
                     MDMAppConstants.AndroidConstants.OPCODE_UNINSTALL_APPLICATION.equals(operation.getCode())) {
                 ApplicationManager applicationManager = DeviceMgtAPIUtils.getApplicationManager();
-                applicationManager.updateSubsStatus(device.getId(), operation.getId(),operation.getStatus().toString());
+                applicationManager.updateSubsStatus(device.getId(), operation.getId(), operation.getStatus().toString());
             }
             return Response.status(Response.Status.OK).entity("OperationStatus updated successfully.").build();
         } catch (BadRequestException e) {
@@ -1507,7 +1597,8 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
             String msg = "Error occurred when updating the application subscription status of the operation. " +
                     "The device identifier is: " + deviceIdentifier;
             log.error(msg, e);
-            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();        }
+            return Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(msg).build();
+        }
     }
 
     @GET

components/device-mgt/org.wso2.carbon.device.mgt.common/src/main/java/org/wso2/carbon/device/mgt/common/Billing.java

@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2014, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
+ *
+ * WSO2 Inc. licenses this file to you under the Apache License,
+ * Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License.
+ * you may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.wso2.carbon.device.mgt.common;
+
+import com.google.gson.Gson;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import java.io.Serializable;
+
+@ApiModel(value = "Billing", description = "This class carries all information related to a device billing.")
+public class Billing implements Serializable {
+
+    private static final long serialVersionUID = 1998101711L;
+
+    @ApiModelProperty(name = "invoiceId", value = "ID of the billing.",
+            required = false)
+    private int invoiceId;
+
+    @ApiModelProperty(name = "deviceId", value = "Device id of the billing.",
+            required = false)
+    private int deviceId;
+
+    @ApiModelProperty(name = "tenantId", value = "Tenant of the device.",
+            required = false)
+    private int tenantId;
+
+    @ApiModelProperty(name = "billingStart", value = "Start date of the billing period.", required = false)
+    private Long billingStart;
+
+    @ApiModelProperty(name = "billingEnd", value = "End date of the billing period.", required = false)
+    private Long billingEnd;
+
+    @ApiModelProperty(name = "deviceCount", value = "Device count for a billing period",
+            required = false)
+    private int deviceCount;
+
+
+    public Billing() {
+    }
+
+    public Billing(int invoiceId, int deviceId, int tenantId, Long billingStart, Long billingEnd) {
+        this.invoiceId = invoiceId;
+        this.deviceId = deviceId;
+        this.tenantId = tenantId;
+        this.billingStart = billingStart;
+        this.billingEnd = billingEnd;
+    }
+
+    public int getInvoiceId() {
+        return invoiceId;
+    }
+
+    public void setInvoiceId(int invoiceId) {
+        this.invoiceId = invoiceId;
+    }
+
+    public int getDeviceId() {
+        return deviceId;
+    }
+
+    public void setDeviceId(int deviceId) {
+        this.deviceId = deviceId;
+    }
+
+    public int getTenantId() {
+        return tenantId;
+    }
+
+    public void setTenantId(int tenantId) {
+        this.tenantId = tenantId;
+    }
+
+    public Long getBillingStart() {
+        return billingStart;
+    }
+
+    public void setBillingStart(Long billingStart) {
+        this.billingStart = billingStart;
+    }
+
+    public Long getBillingEnd() {
+        return billingEnd;
+    }
+
+    public void setBillingEnd(Long billingEnd) {
+        this.billingEnd = billingEnd;
+    }
+
+    public int getDeviceCount() {
+        return deviceCount;
+    }
+
+    public void setDeviceCount(int deviceCount) {
+        this.deviceCount = deviceCount;
+    }
+
+    @Override
+    public String toString() {
+        return new Gson().toJson(this);
+    }
+
+
+}

components/device-mgt/org.wso2.carbon.device.mgt.common/src/main/java/org/wso2/carbon/device/mgt/common/Device.java

@@ -24,8 +24,10 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import org.wso2.carbon.device.mgt.common.app.mgt.Application;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceInfo;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceLocationHistorySnapshotWrapper;
+import org.wso2.carbon.device.mgt.common.type.mgt.DeviceStatus;
 
 import java.io.Serializable;
+import java.util.ArrayList;
 import java.util.List;
 
 @ApiModel(value = "Device", description = "This class carries all information related to a managed device.")
@@ -72,6 +74,17 @@ public class Device implements Serializable {
     required = false)
     private List<Application> applications;
 
+    @ApiModelProperty(name = "cost", value = "Cost charged per device.", required = false)
+    private double cost;
+
+    @ApiModelProperty(name = "daysUsed", value = "Number of days gone since device enrollment.",
+            required = false)
+    private int daysUsed;
+
+    @ApiModelProperty(name = "deviceStatusInfo", value = "This defines the device status details. " +
+            "It is mandatory to define this information.", required = false)
+    private List<DeviceStatus> deviceStatusInfo = new ArrayList<>();
+
     @ApiModelProperty(
             name = "historySnapshot",
             value = "device history snapshots")
@@ -92,6 +105,30 @@ public class Device implements Serializable {
         this.properties = properties;
     }
 
+    public double getCost() {
+        return cost;
+    }
+
+    public void setCost(double cost) {
+        this.cost = cost;
+    }
+
+    public int getDaysUsed() {
+        return daysUsed;
+    }
+
+    public void setDaysUsed(int daysUsed) {
+        this.daysUsed = daysUsed;
+    }
+
+    public List<DeviceStatus> getDeviceStatusInfo() {
+        return deviceStatusInfo;
+    }
+
+    public void setDeviceStatusInfo(List<DeviceStatus> deviceStatusInfo) {
+        this.deviceStatusInfo = deviceStatusInfo;
+    }
+
     public int getId() {
         return id;
     }

components/device-mgt/org.wso2.carbon.device.mgt.common/src/main/java/org/wso2/carbon/device/mgt/common/DeviceBilling.java

@@ -0,0 +1,170 @@
+/*
+ * Copyright (c) 2014, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
+ *
+ * WSO2 Inc. licenses this file to you under the Apache License,
+ * Version 2.0 (the "License"); you may not use this file except
+ * in compliance with the License.
+ * you may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.wso2.carbon.device.mgt.common;
+
+import com.google.gson.Gson;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+import org.wso2.carbon.device.mgt.common.device.details.DeviceInfo;
+import org.wso2.carbon.device.mgt.common.type.mgt.DeviceStatus;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+@ApiModel(value = "DeviceBilling", description = "This class carries all information related to a device billing.")
+public class DeviceBilling implements Serializable {
+
+    private static final long serialVersionUID = 1998101711L;
+
+    @ApiModelProperty(name = "id", value = "ID of the device in the device information database.",
+            required = false)
+    private int id;
+
+    @ApiModelProperty(name = "name", value = "The device name that can be set on the device by the device user.",
+            required = true)
+    private String name;
+
+    @ApiModelProperty(name = "description", value = "Additional information on the device.", required = false)
+    private String description;
+
+    @ApiModelProperty(name = "cost", value = "Cost charged per device.", required = false)
+    private Double cost;
+
+    @ApiModelProperty(name = "deviceIdentifier", value = "This is a 64-bit number (as a hex string) that is randomly" +
+            " generated when the user first sets up the device and should" +
+            " remain constant for the lifetime of the user's device." +
+            " The value may change if a factory reset is performed on " +
+            "the device.",
+            required = false)
+    private String deviceIdentifier;
+
+    @ApiModelProperty(name = "daysSinceEnrolled", value = "Number of days gone since device enrollment.",
+            required = false)
+    private int daysSinceEnrolled;
+
+    @ApiModelProperty(name = "daysUsed", value = "Number of days gone since device enrollment date to date device was removed.",
+            required = false)
+    private int daysUsed;
+
+    @ApiModelProperty(name = "enrolmentInfo", value = "This defines the device registration related information. " +
+            "It is mandatory to define this information.", required = false)
+    private EnrolmentInfo enrolmentInfo;
+
+    @ApiModelProperty(name = "deviceStatusInfo", value = "This defines the device status details. " +
+            "It is mandatory to define this information.", required = false)
+    private List<DeviceStatus> deviceStatusInfo = new ArrayList<>();
+
+    @ApiModelProperty(name = "advanceInfo", value = "This defines the device registration related information. " +
+            "It is mandatory to define this information.", required = false)
+    private DeviceInfo deviceInfo;
+
+    public DeviceBilling() {
+    }
+
+    public List<DeviceStatus> getDeviceStatusInfo() {
+        return deviceStatusInfo;
+    }
+
+    public void setDeviceStatusInfo(List<DeviceStatus> deviceStatusInfo) {
+        this.deviceStatusInfo = deviceStatusInfo;
+    }
+
+    public int getDaysUsed() {
+        return daysUsed;
+    }
+
+    public void setDaysUsed(int daysUsed) {
+        this.daysUsed = daysUsed;
+    }
+
+    public int getDaysSinceEnrolled() {
+        return daysSinceEnrolled;
+    }
+
+    public void setDaysSinceEnrolled(int daysSinceEnrolled) {
+        this.daysSinceEnrolled = daysSinceEnrolled;
+    }
+
+    public Double getCost() {
+        return cost;
+    }
+
+    public void setCost(Double cost) {
+        this.cost = cost;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+
+    public String getDeviceIdentifier() {
+        return deviceIdentifier;
+    }
+
+    public void setDeviceIdentifier(String deviceIdentifier) {
+        this.deviceIdentifier = deviceIdentifier;
+    }
+
+    public EnrolmentInfo getEnrolmentInfo() {
+        return enrolmentInfo;
+    }
+
+    public void setEnrolmentInfo(EnrolmentInfo enrolmentInfo) {
+        this.enrolmentInfo = enrolmentInfo;
+    }
+
+    public DeviceInfo getDeviceInfo() {
+        return deviceInfo;
+    }
+
+    public void setDeviceInfo(DeviceInfo deviceInfo) {
+        this.deviceInfo = deviceInfo;
+    }
+
+    @Override
+    public String toString() {
+        return new Gson().toJson(this);
+    }
+
+    @Override
+    public int hashCode() {
+        return getDeviceIdentifier().hashCode();
+    }
+
+}

components/device-mgt/org.wso2.carbon.device.mgt.common/src/main/java/org/wso2/carbon/device/mgt/common/EnrolmentInfo.java

@@ -22,6 +22,7 @@ import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
 
 import java.io.Serializable;
+import java.math.BigInteger;
 
 @ApiModel(value = "EnrolmentInfo", description = "This class carries all information related to a devices enrollment" +
                                                  " status.")
@@ -48,6 +49,8 @@ public class EnrolmentInfo implements Serializable {
     private Long dateOfEnrolment;
     @ApiModelProperty(name = "dateOfLastUpdate", value = "Date of the device's last update. This value is not necessary.", required = false )
     private Long dateOfLastUpdate;
+    @ApiModelProperty(name = "lastBilledDate", value = "Date of the device's last billed date", required = false )
+    private Long lastBilledDate;
     @ApiModelProperty(name = "ownership", value = "Defines the ownership details. The ownership type can be any of the" +
                                                   " following values.\n" +
                                                   "BYOD - Bring your own device (BYOD).\n" +
@@ -92,6 +95,14 @@ public class EnrolmentInfo implements Serializable {
         this.dateOfEnrolment = dateOfEnrolment;
     }
 
+    public Long getLastBilledDate() {
+        return lastBilledDate;
+    }
+
+    public void setLastBilledDate(Long lastBilledDate) {
+        this.lastBilledDate = lastBilledDate;
+    }
+
     public Long getDateOfLastUpdate() {
         return dateOfLastUpdate;
     }

components/device-mgt/org.wso2.carbon.device.mgt.common/src/main/java/org/wso2/carbon/device/mgt/common/PaginationResult.java

@@ -44,6 +44,39 @@ public class PaginationResult implements Serializable {
     @ApiModelProperty(name = "data", value = "This holds the database records that matches given criteria", required = true)
     private List<?> data;
 
+    @ApiModelProperty(name = "totalCost", value = "Total cost of all devices per tenant", required = false)
+    private double totalCost;
+
+    @ApiModelProperty(name = "billedDateIsValid", value = "Check if user entered date is valid", required = false)
+    private boolean billedDateIsValid;
+
+    @ApiModelProperty(name = "message", value = "Send information text to the billing UI", required = false)
+    private String message;
+
+    public boolean isBilledDateIsValid() {
+        return billedDateIsValid;
+    }
+
+    public void setBilledDateIsValid(boolean billedDateIsValid) {
+        this.billedDateIsValid = billedDateIsValid;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public double getTotalCost() {
+        return totalCost;
+    }
+
+    public void setTotalCost(double totalCost) {
+        this.totalCost = totalCost;
+    }
+
     public int getRecordsTotal() {
         return recordsTotal;
     }

components/device-mgt/org.wso2.carbon.device.mgt.common/src/main/java/org/wso2/carbon/device/mgt/common/cost/mgt/Cost.java

@@ -0,0 +1,54 @@
+/*
+ *  Copyright (c) 2020, Entgra (Pvt) Ltd. (http://www.entgra.io) All Rights Reserved.
+ *
+ *  Entgra (Pvt) Ltd. licenses this file to you under the Apache License,
+ *  Version 2.0 (the "License"); you may not use this file except
+ *  in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied. See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ */
+
+package org.wso2.carbon.device.mgt.common.cost.mgt;
+
+import com.google.gson.Gson;
+
+import javax.xml.bind.annotation.XmlElement;
+import javax.xml.bind.annotation.XmlRootElement;
+
+@XmlRootElement(name = "Cost")
+public class Cost {
+
+    private String tenantDomain;
+    private Double cost;
+
+    @XmlElement(name = "tenantDomain", required = true)
+    public String getTenantDomain() {
+        return tenantDomain;
+    }
+
+    public void setTenantDomain(String tenantDomain) {
+        this.tenantDomain = tenantDomain;
+    }
+
+    @XmlElement(name = "cost", required = true)
+    public Double getCost() {
+        return cost;
+    }
+
+    public void setCost(Double cost) {
+        this.cost = cost;
+    }
+
+    @Override
+    public String toString() {
+        return new Gson().toJson(this);
+    }
+}

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

@@ -44,6 +44,8 @@ public final class DeviceManagementConstants {
     public static final String DEVICE_CACHE = "DEVICE_CACHE";
     public static final String API_RESOURCE_PERMISSION_CACHE = "API_RESOURCE_CACHE_CACHE";
     public static final String GEOFENCE_CACHE = "GEOFENCE_CACHE";
+    public static final String META_KEY = "PER_DEVICE_COST";
+    public static final String ACTIVE_STATUS = "ACTIVE";
     public static final String ENROLLMENT_NOTIFICATION_API_ENDPOINT = "/api/device-mgt/enrollment-notification";
     public static final String URL_SEPERATOR = "/";
 

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/config/ui/Billing.java

@@ -0,0 +1,66 @@
+package org.wso2.carbon.device.mgt.core.config.ui;
+
+import javax.xml.bind.annotation.XmlElement;
+
+public class Billing {
+    private boolean isHideBillGenerationInSuperTenant;
+    private boolean isHideBillGenerationInSubTenant;
+    private boolean isHideTotalCalculationInSuperTenant;
+    private boolean isHideTotalCalculationInSubTenant;
+    private boolean isHideDomainSelectionInSuperTenant;
+    private boolean isHideDomainSelectionInSubTenant;
+
+    @XmlElement(name = "HideDomainSelectionInSuperTenant")
+    public boolean isHideDomainSelectionInSuperTenant() {
+        return isHideDomainSelectionInSuperTenant;
+    }
+
+    public void setHideDomainSelectionInSuperTenant(boolean hideDomainSelectionInSuperTenant) {
+        isHideDomainSelectionInSuperTenant = hideDomainSelectionInSuperTenant;
+    }
+
+    @XmlElement(name = "HideDomainSelectionInSubTenant")
+    public boolean isHideDomainSelectionInSubTenant() {
+        return isHideDomainSelectionInSubTenant;
+    }
+
+    public void setHideDomainSelectionInSubTenant(boolean hideDomainSelectionInSubTenant) {
+        isHideDomainSelectionInSubTenant = hideDomainSelectionInSubTenant;
+    }
+
+    @XmlElement(name = "HideBillGenerationInSuperTenant")
+    public boolean isHideBillGenerationInSuperTenant() {
+        return isHideBillGenerationInSuperTenant;
+    }
+
+    public void setHideBillGenerationInSuperTenant(boolean hideBillGenerationInSuperTenant) {
+        isHideBillGenerationInSuperTenant = hideBillGenerationInSuperTenant;
+    }
+
+    @XmlElement(name = "HideBillGenerationInSubTenant")
+    public boolean isHideBillGenerationInSubTenant() {
+        return isHideBillGenerationInSubTenant;
+    }
+
+    public void setHideBillGenerationInSubTenant(boolean hideBillGenerationInSubTenant) {
+        isHideBillGenerationInSubTenant = hideBillGenerationInSubTenant;
+    }
+
+    @XmlElement(name = "HideTotalCalculationInSuperTenant")
+    public boolean isHideTotalCalculationInSuperTenant() {
+        return isHideTotalCalculationInSuperTenant;
+    }
+
+    public void setHideTotalCalculationInSuperTenant(boolean hideTotalCalculationInSuperTenant) {
+        isHideTotalCalculationInSuperTenant = hideTotalCalculationInSuperTenant;
+    }
+
+    @XmlElement(name = "HideTotalCalculationInSubTenant")
+    public boolean isHideTotalCalculationInSubTenant() {
+        return isHideTotalCalculationInSubTenant;
+    }
+
+    public void setHideTotalCalculationInSubTenant(boolean hideTotalCalculationInSubTenant) {
+        isHideTotalCalculationInSubTenant = hideTotalCalculationInSubTenant;
+    }
+}

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/config/ui/UIConfiguration.java

@@ -33,6 +33,7 @@ public class UIConfiguration {
     private boolean isSsoEnable;
     private int sessionTimeOut;
     private int loginCacheCapacity;
+    private Billing billing;
 
     @XmlElement(name = "AppRegistration", required=true)
     public AppRegistration getAppRegistration() {
@@ -62,6 +63,15 @@ public class UIConfiguration {
         isSsoEnable = ssoEnable;
     }
 
+    @XmlElement(name = "Billing", required=true)
+    public Billing getBilling() {
+        return billing;
+    }
+
+    public void setBilling(Billing billing) {
+        this.billing = billing;
+    }
+
     @XmlElement(name = "SessionTimeOut")
     public int getSessionTimeOut() {
         return sessionTimeOut;

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/BillingDAO.java

@@ -0,0 +1,13 @@
+package org.wso2.carbon.device.mgt.core.dao;
+
+import org.wso2.carbon.device.mgt.common.Billing;
+
+import java.sql.Timestamp;
+import java.util.List;
+
+public interface BillingDAO {
+
+    void addBilling(int deviceId, int tenantId, Timestamp billingStart, Timestamp billingEnd) throws DeviceManagementDAOException;
+
+    List<Billing> getBilling(int deviceId, Timestamp billingStart, Timestamp billingEnd) throws DeviceManagementDAOException;
+}

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/DeviceDAO.java

@@ -36,12 +36,8 @@
 package org.wso2.carbon.device.mgt.core.dao;
 
 import org.apache.commons.collections.map.SingletonMap;
-import org.wso2.carbon.device.mgt.common.Device;
+import org.wso2.carbon.device.mgt.common.*;
-import org.wso2.carbon.device.mgt.common.DeviceIdentifier;
-import org.wso2.carbon.device.mgt.common.EnrolmentInfo;
 import org.wso2.carbon.device.mgt.common.EnrolmentInfo.Status;
-import org.wso2.carbon.device.mgt.common.PaginationRequest;
-import org.wso2.carbon.device.mgt.common.Count;
 import org.wso2.carbon.device.mgt.common.configuration.mgt.DevicePropertyInfo;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceData;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceLocationHistorySnapshot;
@@ -49,9 +45,9 @@ import org.wso2.carbon.device.mgt.common.device.details.DeviceMonitoringData;
 import org.wso2.carbon.device.mgt.common.geo.service.GeoQuery;
 import org.wso2.carbon.device.mgt.core.dto.DeviceType;
 import org.wso2.carbon.device.mgt.common.geo.service.GeoCluster;
-import org.wso2.carbon.device.mgt.common.geo.service.GeoCoordinate;
 
 import java.sql.SQLException;
+import java.sql.Timestamp;
 import java.util.Date;
 import java.util.List;
 import java.util.Map;
@@ -297,6 +293,14 @@ public interface DeviceDAO {
      */
     List<Device> getDevices(PaginationRequest request, int tenantId) throws DeviceManagementDAOException;
 
+    /**
+     * This method is used to retrieve the devices of a given tenant without pagination.
+     * @param tenantId tenant id.
+     * @return returns a list of devices of the tenant.
+     * @throws DeviceManagementDAOException
+     */
+    List<Device> getDeviceListWithoutPagination(int tenantId) throws DeviceManagementDAOException;
+
     /**
      * This method is used to retrieve the devices of a given tenant as a paginated result, along the lines of
      * activeServerCount and serverIndex

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/DeviceManagementDAOFactory.java

@@ -42,6 +42,7 @@ import org.wso2.carbon.device.mgt.core.privacy.dao.impl.PrivacyComplianceDAOImpl
 import javax.sql.DataSource;
 import java.sql.Connection;
 import java.sql.SQLException;
+import java.sql.Timestamp;
 import java.util.Hashtable;
 import java.util.List;
 
@@ -124,6 +125,11 @@ public class DeviceManagementDAOFactory {
     public static EnrollmentDAO getEnrollmentDAO() {
         return new EnrollmentDAOImpl();
     }
+
+    public static BillingDAO getBillingDAO() {
+        return new BillingDAOImpl();
+    }
+
     public static DeviceStatusDAO getDeviceStatusDAO() {
         return new DeviceStatusDAOImpl();
     }

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/DeviceStatusDAO.java

@@ -34,7 +34,7 @@ public interface DeviceStatusDAO {
 
     List<DeviceStatus> getStatus(int deviceId, int tenantId) throws DeviceManagementDAOException;
 
-    List<DeviceStatus> getStatus(int deviceId, int tenantId, Date fromDate, Date toDate) throws DeviceManagementDAOException;
+    List<DeviceStatus> getStatus(int deviceId, int tenantId, Date fromDate, Date toDate, boolean billingStatus) throws DeviceManagementDAOException;
 
     List<DeviceStatus> getStatus(int enrolmentId) throws DeviceManagementDAOException;
 

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/EnrollmentDAO.java

@@ -22,6 +22,7 @@ import org.wso2.carbon.device.mgt.common.Device;
 import org.wso2.carbon.device.mgt.common.EnrolmentInfo;
 import org.wso2.carbon.device.mgt.common.EnrolmentInfo.Status;
 
+import java.sql.Timestamp;
 import java.util.List;
 
 public interface EnrollmentDAO {
@@ -32,6 +33,8 @@ public interface EnrollmentDAO {
 
     boolean updateEnrollmentStatus(List<EnrolmentInfo> enrolmentInfos) throws DeviceManagementDAOException;
 
+    boolean updateEnrollmentLastBilledDate(EnrolmentInfo enrolmentInfos, Timestamp lastBilledDate, int tenantId) throws DeviceManagementDAOException;
+
     int removeEnrollment(int deviceId, String currentOwner, int tenantId) throws DeviceManagementDAOException;
 
     @Deprecated

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/BillingDAOImpl.java

@@ -0,0 +1,71 @@
+package org.wso2.carbon.device.mgt.core.dao.impl;
+
+import org.wso2.carbon.device.mgt.common.Billing;
+import org.wso2.carbon.device.mgt.common.EnrolmentInfo;
+import org.wso2.carbon.device.mgt.core.dao.BillingDAO;
+import org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOException;
+import org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOFactory;
+import org.wso2.carbon.device.mgt.core.dao.util.DeviceManagementDAOUtil;
+
+import java.sql.*;
+import java.util.ArrayList;
+import java.util.List;
+
+public class BillingDAOImpl implements BillingDAO {
+
+    @Override
+    public void addBilling(int deviceId, int tenantId, Timestamp billingStart, Timestamp billingEnd) throws DeviceManagementDAOException {
+
+        Connection conn;
+        PreparedStatement stmt = null;
+        ResultSet rs = null;
+        try {
+            conn = this.getConnection();
+            String sql = "INSERT INTO DM_BILLING(DEVICE_ID, TENANT_ID, BILLING_START, BILLING_END) VALUES(?, ?, ?, ?)";
+            stmt = conn.prepareStatement(sql, new String[] {"invoice_id"});
+            stmt.setInt(1, deviceId);
+            stmt.setInt(2,tenantId);
+            stmt.setTimestamp(3, billingStart);
+            stmt.setTimestamp(4, billingEnd);
+            stmt.execute();
+        } catch (SQLException e) {
+            e.printStackTrace();
+            throw new DeviceManagementDAOException("Error occurred while adding billing period", e);
+        } finally {
+            DeviceManagementDAOUtil.cleanupResources(stmt, rs);
+        }
+    }
+
+    @Override
+    public List<Billing> getBilling(int deviceId, Timestamp billingStart, Timestamp billingEnd) throws DeviceManagementDAOException {
+        List<Billing> billings = new ArrayList<>();
+        Connection conn;
+        PreparedStatement stmt = null;
+        ResultSet rs = null;
+        EnrolmentInfo.Status status = null;
+        try {
+            conn = this.getConnection();
+            String sql;
+
+            sql = "SELECT * FROM DM_BILLING WHERE DEVICE_ID = ?";
+            stmt = conn.prepareStatement(sql);
+            stmt.setInt(1, deviceId);
+            rs = stmt.executeQuery();
+
+            while (rs.next()) {
+                Billing bill = new Billing(rs.getInt("INVOICE_ID"), rs.getInt("DEVICE_ID"),rs.getInt("TENANT_ID"),
+                      (rs.getTimestamp("BILLING_START").getTime()), (rs.getTimestamp("BILLING_END").getTime()));
+                billings.add(bill);
+            }
+        } catch (SQLException e) {
+            throw new DeviceManagementDAOException("Error occurred getting billing periods", e);
+        } finally {
+            DeviceManagementDAOUtil.cleanupResources(stmt, null);
+        }
+        return billings;
+    }
+
+    private Connection getConnection() throws SQLException {
+        return DeviceManagementDAOFactory.getConnection();
+    }
+}

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/DeviceStatusDAOImpl.java

@@ -15,7 +15,7 @@ import java.util.List;
 
 public class DeviceStatusDAOImpl implements DeviceStatusDAO {
 
-  private List<DeviceStatus> getStatus(int id, Date fromDate, Date toDate, boolean isDeviceId) throws DeviceManagementDAOException {
+  private List<DeviceStatus> getStatus(int id, Date fromDate, Date toDate, boolean isDeviceId, boolean billingStatus) throws DeviceManagementDAOException {
     List<DeviceStatus> result = new ArrayList<>();
     Connection conn;
     PreparedStatement stmt = null;
@@ -25,7 +25,14 @@ public class DeviceStatusDAOImpl implements DeviceStatusDAO {
       conn = this.getConnection();
       // either we list all status values for the device using the device id or only get status values for the given enrolment id
       String idType = isDeviceId ? "DEVICE_ID" : "ENROLMENT_ID";
-      String sql = "SELECT ENROLMENT_ID, DEVICE_ID, UPDATE_TIME, STATUS, CHANGED_BY FROM DM_DEVICE_STATUS WHERE " + idType + " = ?";
+      String sql;
+
+      if (billingStatus) {
+        sql = "SELECT ENROLMENT_ID, DEVICE_ID, UPDATE_TIME, STATUS, CHANGED_BY FROM DM_DEVICE_STATUS WHERE STATUS IN ('ACTIVE','REMOVED') AND " + idType + " = ?";
+      } else {
+        sql = "SELECT ENROLMENT_ID, DEVICE_ID, UPDATE_TIME, STATUS, CHANGED_BY FROM DM_DEVICE_STATUS WHERE " + idType + " = ?";
+      }
+
       // filter the data based on a date range if specified
       if (fromDate != null){
         sql += " AND UPDATE_TIME >= ?";
@@ -64,17 +71,17 @@ public class DeviceStatusDAOImpl implements DeviceStatusDAO {
 
   @Override
   public List<DeviceStatus> getStatus(int enrolmentId, Date fromDate, Date toDate) throws DeviceManagementDAOException {
-    return getStatus(enrolmentId, fromDate, toDate, false);
+    return getStatus(enrolmentId, fromDate, toDate, false, false);
   }
 
   @Override
   public List<DeviceStatus> getStatus(int deviceId, int tenantId) throws DeviceManagementDAOException {
-    return getStatus(deviceId, tenantId, null, null);
+    return getStatus(deviceId, tenantId, null, null, false);
   }
 
   @Override
-  public List<DeviceStatus> getStatus(int deviceId, int tenantId, Date fromDate, Date toDate) throws DeviceManagementDAOException {
+  public List<DeviceStatus> getStatus(int deviceId, int tenantId, Date fromDate, Date toDate, boolean billingStatus) throws DeviceManagementDAOException {
-    return getStatus(deviceId, fromDate, toDate, true);
+    return getStatus(deviceId, fromDate, toDate, true, billingStatus);
   }
 
   @Override

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/EnrollmentDAOImpl.java

@@ -144,6 +144,27 @@ public class EnrollmentDAOImpl implements EnrollmentDAO {
         return status;
     }
 
+    @Override
+    public boolean updateEnrollmentLastBilledDate(EnrolmentInfo enrolmentInfo, Timestamp lastBilledDate, int tenantId) throws DeviceManagementDAOException {
+        Connection conn;
+        PreparedStatement stmt = null;
+        ResultSet rs = null;
+        try {
+            conn = this.getConnection();
+            String sql = "UPDATE DM_ENROLMENT SET LAST_BILLED_DATE = ? WHERE ID = ? AND TENANT_ID = ?";
+            stmt = conn.prepareStatement(sql);
+            stmt.setLong(1, lastBilledDate.getTime());
+            stmt.setInt(2, enrolmentInfo.getId());
+            stmt.setInt(3, tenantId);
+            stmt.executeUpdate();
+            return true;
+        } catch (SQLException e) {
+            throw new DeviceManagementDAOException("Error occurred while updating enrolment last billed date.", e);
+        } finally {
+            DeviceManagementDAOUtil.cleanupResources(stmt, rs);
+        }
+    }
+
 
     @Override
     public int removeEnrollment(int deviceId, String currentOwner,

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/GenericDeviceDAOImpl.java

@@ -18,7 +18,6 @@
 
 package org.wso2.carbon.device.mgt.core.dao.impl.device;
 
-import org.apache.commons.lang.StringUtils;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.device.mgt.common.Count;
@@ -85,6 +84,7 @@ public class GenericDeviceDAOImpl extends AbstractDeviceDAOImpl {
                     "e.IS_TRANSFERRED, " +
                     "e.DATE_OF_LAST_UPDATE, " +
                     "e.DATE_OF_ENROLMENT, " +
+                    "e.LAST_BILLED_DATE, " +
                     "e.ID AS ENROLMENT_ID " +
                     "FROM DM_ENROLMENT e, " +
                     "(SELECT d.ID, " +
@@ -188,6 +188,34 @@ public class GenericDeviceDAOImpl extends AbstractDeviceDAOImpl {
         }
     }
 
+    @Override
+    public List<Device> getDeviceListWithoutPagination(int tenantId)
+            throws DeviceManagementDAOException {
+        Connection conn;
+        PreparedStatement stmt = null;
+        List<Device> devices = new ArrayList<>();
+        try {
+            conn = this.getConnection();
+            String sql = "SELECT DM_DEVICE.ID AS DEVICE_ID, DEVICE_IDENTIFICATION, DESCRIPTION, DM_DEVICE.NAME AS DEVICE_NAME, DM_DEVICE_TYPE.NAME AS DEVICE_TYPE,\n" +
+                    "DM_ENROLMENT.ID AS ENROLMENT_ID, DATE_OF_ENROLMENT,OWNER, OWNERSHIP,IS_TRANSFERRED, STATUS, DATE_OF_LAST_UPDATE, LAST_BILLED_DATE,\n" +
+                    "TIMESTAMPDIFF('DAY', DATE_OF_ENROLMENT, CURDATE()) as DAYS_SINCE_ENROLLED FROM DM_DEVICE JOIN DM_ENROLMENT\n" +
+                    "ON (DM_DEVICE.ID = DM_ENROLMENT.DEVICE_ID) JOIN DM_DEVICE_TYPE ON (DM_DEVICE.DEVICE_TYPE_ID = DM_DEVICE_TYPE.ID) WHERE DM_ENROLMENT.TENANT_ID=?";
+            stmt = conn.prepareStatement(sql);
+            stmt.setInt(1, tenantId);
+            ResultSet rs = stmt.executeQuery();
+
+            while (rs.next()) {
+                Device device = DeviceManagementDAOUtil.loadDevice(rs);
+                devices.add(device);
+            }
+        } catch (SQLException e) {
+            throw new DeviceManagementDAOException("Error occurred while fetching the list of device billing ", e);
+        } finally {
+            DeviceManagementDAOUtil.cleanupResources(stmt, null);
+        }
+        return devices;
+    }
+
     @Override
     public List<Device> getAllocatedDevices(PaginationRequest request, int tenantId, int activeServerCount, int serverIndex)
             throws DeviceManagementDAOException {

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/OracleDeviceDAOImpl.java

@@ -23,6 +23,7 @@ import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.device.mgt.common.Count;
 import org.wso2.carbon.device.mgt.common.Device;
+import org.wso2.carbon.device.mgt.common.DeviceBilling;
 import org.wso2.carbon.device.mgt.common.PaginationRequest;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceInfo;
 import org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOException;
@@ -187,6 +188,11 @@ public class OracleDeviceDAOImpl extends AbstractDeviceDAOImpl {
         }
     }
 
+    @Override
+    public List<Device> getDeviceListWithoutPagination(int tenantId) throws DeviceManagementDAOException {
+        return null;
+    }
+
     @Override
     public List<Device> getAllocatedDevices(PaginationRequest request, int tenantId,
                                    int activeServerCount, int serverIndex)

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/PostgreSQLDeviceDAOImpl.java

@@ -23,6 +23,7 @@ import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.device.mgt.common.Count;
 import org.wso2.carbon.device.mgt.common.Device;
+import org.wso2.carbon.device.mgt.common.DeviceBilling;
 import org.wso2.carbon.device.mgt.common.PaginationRequest;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceInfo;
 import org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOException;
@@ -178,6 +179,11 @@ public class PostgreSQLDeviceDAOImpl extends AbstractDeviceDAOImpl {
         }
     }
 
+    @Override
+    public List<Device> getDeviceListWithoutPagination(int tenantId) throws DeviceManagementDAOException {
+        return null;
+    }
+
     @Override
     public List<Device> getAllocatedDevices(PaginationRequest request, int tenantId,
                                    int activeServerCount, int serverIndex)

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/device/SQLServerDeviceDAOImpl.java

@@ -23,6 +23,7 @@ import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.device.mgt.common.Count;
 import org.wso2.carbon.device.mgt.common.Device;
+import org.wso2.carbon.device.mgt.common.DeviceBilling;
 import org.wso2.carbon.device.mgt.common.PaginationRequest;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceInfo;
 import org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOException;
@@ -188,6 +189,11 @@ public class SQLServerDeviceDAOImpl extends AbstractDeviceDAOImpl {
         }
     }
 
+    @Override
+    public List<Device> getDeviceListWithoutPagination(int tenantId) throws DeviceManagementDAOException {
+        return null;
+    }
+
     @Override
     public List<Device> getAllocatedDevices(PaginationRequest request, int tenantId,
                                             int activeServerCount, int serverIndex)

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/util/DeviceManagementDAOUtil.java

@@ -21,16 +21,20 @@ import java.sql.*;
 import java.time.Instant;
 import java.time.LocalDateTime;
 import java.time.ZoneId;
+import java.util.*;
 import java.util.Date;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.wso2.carbon.context.CarbonContext;
 import org.wso2.carbon.device.mgt.common.Device;
+import org.wso2.carbon.device.mgt.common.DeviceBilling;
 import org.wso2.carbon.device.mgt.common.DeviceIdentifier;
 import org.wso2.carbon.device.mgt.common.EnrolmentInfo;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceInfo;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceLocationHistorySnapshot;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceMonitoringData;
+import org.wso2.carbon.device.mgt.common.type.mgt.DeviceStatus;
 import org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOException;
 import org.wso2.carbon.device.mgt.core.dto.DeviceType;
 import org.wso2.carbon.device.mgt.core.internal.DeviceManagementDataHolder;
@@ -40,9 +44,6 @@ import org.wso2.carbon.utils.multitenancy.MultitenantConstants;
 
 import javax.naming.InitialContext;
 import javax.sql.DataSource;
-import java.util.HashMap;
-import java.util.Hashtable;
-import java.util.Map;
 
 public final class DeviceManagementDAOUtil {
 
@@ -142,6 +143,14 @@ public final class DeviceManagementDAOUtil {
 
     public static EnrolmentInfo loadEnrolment(ResultSet rs) throws SQLException {
         EnrolmentInfo enrolmentInfo = new EnrolmentInfo();
+        String columnName = "LAST_BILLED_DATE";
+        ResultSetMetaData rsmd = rs.getMetaData();
+        int columns = rsmd.getColumnCount();
+        for (int x = 1; x <= columns; x++) {
+            if (columnName.equals(rsmd.getColumnName(x))) {
+                enrolmentInfo.setLastBilledDate(rs.getLong("LAST_BILLED_DATE"));
+            }
+        }
         enrolmentInfo.setId(rs.getInt("ENROLMENT_ID"));
         enrolmentInfo.setOwner(rs.getString("OWNER"));
         enrolmentInfo.setOwnership(EnrolmentInfo.OwnerShip.valueOf(rs.getString("OWNERSHIP")));
@@ -152,6 +161,18 @@ public final class DeviceManagementDAOUtil {
         return enrolmentInfo;
     }
 
+    public static EnrolmentInfo loadEnrolmentBilling(ResultSet rs) throws SQLException {
+        EnrolmentInfo enrolmentInfo = new EnrolmentInfo();
+        enrolmentInfo.setId(rs.getInt("ENROLMENT_ID"));
+        enrolmentInfo.setDateOfEnrolment(rs.getTimestamp("DATE_OF_ENROLMENT").getTime());
+        enrolmentInfo.setLastBilledDate(rs.getLong("LAST_BILLED_DATE"));
+        enrolmentInfo.setStatus(EnrolmentInfo.Status.valueOf(rs.getString("STATUS")));
+        if (EnrolmentInfo.Status.valueOf(rs.getString("STATUS")).equals("REMOVED")) {
+            enrolmentInfo.setDateOfLastUpdate(rs.getTimestamp("DATE_OF_LAST_UPDATE").getTime());
+        }
+        return enrolmentInfo;
+    }
+
     public static EnrolmentInfo loadMatchingEnrolment(ResultSet rs) throws SQLException {
         Map<EnrolmentInfo.Status, EnrolmentInfo> enrolmentInfos = new HashMap<>();
         EnrolmentInfo enrolmentInfo = loadEnrolment(rs);
@@ -195,6 +216,23 @@ public final class DeviceManagementDAOUtil {
         device.setDeviceIdentifier(rs.getString("DEVICE_IDENTIFICATION"));
         device.setEnrolmentInfo(loadEnrolment(rs));
         return device;
+    }
+
+        public static DeviceBilling loadDeviceBilling(ResultSet rs) throws SQLException {
+        DeviceBilling device = new DeviceBilling();
+        device.setId(rs.getInt("ID"));
+        device.setName(rs.getString("DEVICE_NAME"));
+        device.setDescription(rs.getString("DESCRIPTION"));
+        device.setDeviceIdentifier(rs.getString("DEVICE_IDENTIFICATION"));
+        device.setDaysUsed((int) rs.getLong("DAYS_SINCE_ENROLLED"));
+        device.setEnrolmentInfo(loadEnrolmentBilling(rs));
+        return device;
+//        if (removedDevices) {
+//            device.setDaysUsed((int) rs.getLong("DAYS_USED"));
+//        } else {
+//            device.setDaysSinceEnrolled((int) rs.getLong("DAYS_SINCE_ENROLLED"));
+//        }
+
     }
 
     public static DeviceMonitoringData loadDevice(ResultSet rs, String deviceTypeName) throws SQLException {

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

@@ -36,18 +36,7 @@
 package org.wso2.carbon.device.mgt.core.service;
 
 import org.apache.commons.collections.map.SingletonMap;
-import org.wso2.carbon.device.mgt.common.ActivityPaginationRequest;
+import org.wso2.carbon.device.mgt.common.*;
-import org.wso2.carbon.device.mgt.common.Device;
-import org.wso2.carbon.device.mgt.common.DeviceIdentifier;
-import org.wso2.carbon.device.mgt.common.DeviceTransferRequest;
-import org.wso2.carbon.device.mgt.common.DynamicTaskContext;
-import org.wso2.carbon.device.mgt.common.EnrolmentInfo;
-import org.wso2.carbon.device.mgt.common.FeatureManager;
-import org.wso2.carbon.device.mgt.common.MonitoringOperation;
-import org.wso2.carbon.device.mgt.common.OperationMonitoringTaskConfig;
-import org.wso2.carbon.device.mgt.common.PaginationRequest;
-import org.wso2.carbon.device.mgt.common.PaginationResult;
-import org.wso2.carbon.device.mgt.common.StartupOperationConfig;
 import org.wso2.carbon.device.mgt.common.app.mgt.ApplicationManagementException;
 import org.wso2.carbon.device.mgt.common.configuration.mgt.AmbiguousConfigurationException;
 import org.wso2.carbon.device.mgt.common.configuration.mgt.ConfigurationManagementException;
@@ -80,6 +69,8 @@ import org.wso2.carbon.device.mgt.common.geo.service.GeoCluster;
 import org.wso2.carbon.device.mgt.common.geo.service.GeoCoordinate;
 
 import java.sql.SQLException;
+import java.sql.Timestamp;
+import java.util.Collection;
 import java.util.Date;
 import java.util.List;
 import java.util.Map;
@@ -208,6 +199,27 @@ public interface DeviceManagementProviderService {
      */
     PaginationResult getAllDevices(PaginationRequest request, boolean requireDeviceInfo) throws DeviceManagementException;
 
+    /**
+     * Method to retrieve all the devices with pagination support.
+     *
+     * @param request PaginationRequest object holding the data for pagination
+     * @return PaginationResult - Result including the required parameters necessary to do pagination.
+     * @throws DeviceManagementException If some unusual behaviour is observed while fetching billing of
+     *                                   devices.
+     */
+    PaginationResult getAllDevicesBillings(PaginationRequest request, int tenantId, String tenantDomain, Timestamp startDate, Timestamp endDate, boolean generateBill) throws DeviceManagementException;
+
+    /**
+     * Method to retrieve all the devices with pagination support.
+     *
+     * @return PaginationResult - Result including the device bill list without pagination.
+     * @throws DeviceManagementException If some unusual behaviour is observed while fetching billing of
+     *                                   devices.
+     */
+    PaginationResult createBillingFile(int tenantId, String tenantDomain, Timestamp startDate, Timestamp endDate, boolean generateBill) throws DeviceManagementException;
+
+
+
     /**
      * Returns the device of specified id.
      *
@@ -693,7 +705,7 @@ public interface DeviceManagementProviderService {
 
     List<DeviceStatus> getDeviceStatusHistory(Device device) throws DeviceManagementException;
 
-    List<DeviceStatus> getDeviceStatusHistory(Device device, Date fromDate, Date toDate) throws DeviceManagementException;
+    List<DeviceStatus> getDeviceStatusHistory(Device device, Date fromDate, Date toDate, boolean billingStatus) throws DeviceManagementException;
 
     List<DeviceStatus> getDeviceCurrentEnrolmentStatusHistory(Device device) throws DeviceManagementException;
 

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

@@ -34,6 +34,7 @@
  */
 package org.wso2.carbon.device.mgt.core.service;
 
+import com.google.common.reflect.TypeToken;
 import com.google.gson.Gson;
 import org.apache.commons.collections.map.SingletonMap;
 import org.apache.commons.lang.StringUtils;
@@ -49,23 +50,7 @@ import org.apache.http.protocol.HTTP;
 import org.wso2.carbon.CarbonConstants;
 import org.wso2.carbon.context.CarbonContext;
 import org.wso2.carbon.context.PrivilegedCarbonContext;
-import org.wso2.carbon.device.mgt.common.ActivityPaginationRequest;
+import org.wso2.carbon.device.mgt.common.*;
-import org.wso2.carbon.device.mgt.common.Device;
-import org.wso2.carbon.device.mgt.common.DeviceEnrollmentInfoNotification;
-import org.wso2.carbon.device.mgt.common.DeviceIdentifier;
-import org.wso2.carbon.device.mgt.common.DeviceManager;
-import org.wso2.carbon.device.mgt.common.DeviceNotification;
-import org.wso2.carbon.device.mgt.common.DevicePropertyNotification;
-import org.wso2.carbon.device.mgt.common.DeviceTransferRequest;
-import org.wso2.carbon.device.mgt.common.DynamicTaskContext;
-import org.wso2.carbon.device.mgt.common.EnrolmentInfo;
-import org.wso2.carbon.device.mgt.common.FeatureManager;
-import org.wso2.carbon.device.mgt.common.InitialOperationConfig;
-import org.wso2.carbon.device.mgt.common.MonitoringOperation;
-import org.wso2.carbon.device.mgt.common.OperationMonitoringTaskConfig;
-import org.wso2.carbon.device.mgt.common.PaginationRequest;
-import org.wso2.carbon.device.mgt.common.PaginationResult;
-import org.wso2.carbon.device.mgt.common.StartupOperationConfig;
 import org.wso2.carbon.device.mgt.common.app.mgt.Application;
 import org.wso2.carbon.device.mgt.common.app.mgt.ApplicationManagementException;
 import org.wso2.carbon.device.mgt.common.configuration.mgt.AmbiguousConfigurationException;
@@ -76,6 +61,7 @@ import org.wso2.carbon.device.mgt.common.configuration.mgt.DeviceConfiguration;
 import org.wso2.carbon.device.mgt.common.configuration.mgt.DevicePropertyInfo;
 import org.wso2.carbon.device.mgt.common.configuration.mgt.EnrollmentConfiguration;
 import org.wso2.carbon.device.mgt.common.configuration.mgt.PlatformConfiguration;
+import org.wso2.carbon.device.mgt.common.cost.mgt.Cost;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceData;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceInfo;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceLocation;
@@ -99,6 +85,7 @@ import org.wso2.carbon.device.mgt.common.group.mgt.GroupManagementException;
 import org.wso2.carbon.device.mgt.common.invitation.mgt.DeviceEnrollmentInvitationDetails;
 import org.wso2.carbon.device.mgt.common.license.mgt.License;
 import org.wso2.carbon.device.mgt.common.license.mgt.LicenseManagementException;
+import org.wso2.carbon.device.mgt.common.metadata.mgt.Metadata;
 import org.wso2.carbon.device.mgt.common.operation.mgt.Activity;
 import org.wso2.carbon.device.mgt.common.operation.mgt.Operation;
 import org.wso2.carbon.device.mgt.common.operation.mgt.OperationManagementException;
@@ -129,6 +116,8 @@ import org.wso2.carbon.device.mgt.common.geo.service.GeoCoordinate;
 import org.wso2.carbon.device.mgt.core.internal.DeviceManagementDataHolder;
 import org.wso2.carbon.device.mgt.core.internal.DeviceManagementServiceComponent;
 import org.wso2.carbon.device.mgt.core.internal.PluginInitializationListener;
+import org.wso2.carbon.device.mgt.core.metadata.mgt.dao.MetadataDAO;
+import org.wso2.carbon.device.mgt.core.metadata.mgt.dao.MetadataManagementDAOFactory;
 import org.wso2.carbon.device.mgt.core.operation.mgt.CommandOperation;
 import org.wso2.carbon.device.mgt.core.util.DeviceManagerUtil;
 import org.wso2.carbon.email.sender.core.ContentProviderInfo;
@@ -140,23 +129,20 @@ import org.wso2.carbon.email.sender.core.service.EmailSenderService;
 import org.wso2.carbon.stratos.common.beans.TenantInfoBean;
 import org.wso2.carbon.tenant.mgt.services.TenantMgtAdminService;
 import org.wso2.carbon.user.api.UserStoreException;
+import org.wso2.carbon.utils.multitenancy.MultitenantConstants;
 
 import javax.xml.bind.JAXBContext;
 import javax.xml.bind.JAXBException;
 import javax.xml.bind.Marshaller;
 import java.io.IOException;
 import java.io.StringWriter;
+import java.lang.reflect.Type;
 import java.sql.SQLException;
-import java.util.ArrayList;
+import java.sql.Timestamp;
-import java.util.Calendar;
+import java.text.Format;
-import java.util.Collections;
+import java.text.SimpleDateFormat;
-import java.util.Date;
+import java.util.*;
-import java.util.Enumeration;
+import java.util.concurrent.TimeUnit;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Properties;
 import java.util.stream.Collectors;
 
 //import org.wso2.carbon.device.mgt.analytics.data.publisher.exception.DataPublisherConfigurationException;
@@ -172,6 +158,8 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
     private final DeviceTypeDAO deviceTypeDAO;
     private final EnrollmentDAO enrollmentDAO;
     private final ApplicationDAO applicationDAO;
+    private MetadataDAO metadataDAO;
+    private final BillingDAO billingDAO;
     private final DeviceStatusDAO deviceStatusDAO;
 
     public DeviceManagementProviderServiceImpl() {
@@ -180,6 +168,8 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
         this.applicationDAO = DeviceManagementDAOFactory.getApplicationDAO();
         this.deviceTypeDAO = DeviceManagementDAOFactory.getDeviceTypeDAO();
         this.enrollmentDAO = DeviceManagementDAOFactory.getEnrollmentDAO();
+        this.metadataDAO = MetadataManagementDAOFactory.getMetadataDAO();
+        this.billingDAO = DeviceManagementDAOFactory.getBillingDAO();
         this.deviceStatusDAO = DeviceManagementDAOFactory.getDeviceStatusDAO();
 
         /* Registering a listener to retrieve events when some device management service plugin is installed after
@@ -783,8 +773,8 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
             throw new DeviceManagementException(msg);
         }
         if (log.isDebugEnabled()) {
-            log.debug("Getting allocated Devices for Server with index "+ serverIndex + " and" +
+            log.debug("Getting allocated Devices for Server with index " + serverIndex + " and" +
-                      " type '" + deviceType);
+                    " type '" + deviceType);
         }
         List<Device> allocatedDevices;
         try {
@@ -798,7 +788,7 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
             }
         } catch (DeviceManagementDAOException e) {
             String msg = "Error occurred while retrieving all devices of type '" +
-                         deviceType + "' that are being managed within the scope of current tenant";
+                    deviceType + "' that are being managed within the scope of current tenant";
             log.error(msg, e);
             throw new DeviceManagementException(msg, e);
         } catch (SQLException e) {
@@ -952,6 +942,240 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
         return this.getAllDevices(request, true);
     }
 
+    public PaginationResult calculateCost(int tenantId, String tenantDomain, Timestamp startDate, Timestamp endDate, boolean generateBill, List<Device> allDevices) throws DeviceManagementException {
+
+        PaginationResult paginationResult = new PaginationResult();
+        double totalCost = 0.0;
+        boolean allDevicesBilledDateIsValid = true;
+        ArrayList<String> lastBilledDatesList =  new ArrayList<>();
+        List<Billing> invalidDevices =  new ArrayList<>();
+        List<Device> removeBillingPeriodInvalidDevices =  new ArrayList<>() ;
+        List<Device> removeStatusUpdateInvalidDevices =  new ArrayList<>() ;
+
+        try {
+            MetadataManagementDAOFactory.beginTransaction();
+            Metadata metadata = metadataDAO.getMetadata(MultitenantConstants.SUPER_TENANT_ID, DeviceManagementConstants.META_KEY);
+
+            Gson g = new Gson();
+            Collection<Cost> costData = null;
+
+
+            Type collectionType = new TypeToken<Collection<Cost>>() {}.getType();
+            if (metadata != null) {
+                costData = g.fromJson(metadata.getMetaValue(), collectionType);
+                for (Cost tenantCost : costData) {
+                    if (tenantCost.getTenantDomain().equals(tenantDomain)) {
+                        for (Device device : allDevices) {
+                            device.setDeviceStatusInfo(getDeviceStatusHistory(device, null, null, true));
+                            long dateDiff = 0;
+
+                            List<DeviceStatus> deviceStatus = device.getDeviceStatusInfo();
+                            boolean firstDateBilled = false;
+                            boolean deviceStatusIsValid = false;
+
+                            List<Billing> deviceBilling = billingDAO.getBilling(device.getId(), startDate, endDate);
+                            boolean billDateIsInvalid = false;
+
+                            if (deviceBilling.isEmpty()) {
+                                billDateIsInvalid = false;
+                            }
+
+                            if (generateBill) {
+                                for (Billing bill : deviceBilling) {
+                                    if ((bill.getBillingStart() <= startDate.getTime() && startDate.getTime() <= bill.getBillingEnd()) ||
+                                            (bill.getBillingStart() <= endDate.getTime()  && endDate.getTime() <= bill.getBillingEnd())) {
+                                        billDateIsInvalid = true;
+                                        invalidDevices.add(bill);
+                                    }
+                                }
+                            }
+
+                            if (!billDateIsInvalid) {
+                                for (int i = 0; i < deviceStatus.size(); i++) {
+                                    if (DeviceManagementConstants.ACTIVE_STATUS.equals(deviceStatus.get(i).getStatus().toString())) {
+                                        if (deviceStatus.size() > i + 1) {
+                                            if (!firstDateBilled) {
+                                                firstDateBilled = true;
+                                                if (device.getEnrolmentInfo().getLastBilledDate() == 0) {
+                                                    deviceStatusIsValid = true;
+                                                    dateDiff = dateDiff + (deviceStatus.get(i + 1).getUpdateTime().getTime() - deviceStatus.get(i).getUpdateTime().getTime());
+                                                } else {
+                                                    if (deviceStatus.get(i + 1).getUpdateTime().getTime() >= device.getEnrolmentInfo().getLastBilledDate()) {
+                                                        deviceStatusIsValid = true;
+                                                        dateDiff = dateDiff + (deviceStatus.get(i + 1).getUpdateTime().getTime() - device.getEnrolmentInfo().getLastBilledDate());
+                                                    }
+                                                }
+                                            } else {
+                                                if (deviceStatus.get(i).getUpdateTime().getTime() >= device.getEnrolmentInfo().getLastBilledDate()) {
+                                                    deviceStatusIsValid = true;
+                                                    dateDiff = dateDiff + (deviceStatus.get(i + 1).getUpdateTime().getTime() - deviceStatus.get(i).getUpdateTime().getTime());
+                                                }
+                                            }
+                                        } else {
+
+                                            // If only one status row is retrieved this block is executed
+                                            if (!firstDateBilled) {
+                                                firstDateBilled = true;
+
+                                                // Is executed if there is no lastBilled date and if the updates time is before the end date
+                                                if (device.getEnrolmentInfo().getLastBilledDate() == 0) {
+                                                    if (endDate.getTime() >= deviceStatus.get(i).getUpdateTime().getTime()) {
+                                                        deviceStatusIsValid = true;
+                                                        dateDiff = dateDiff + (endDate.getTime() - deviceStatus.get(i).getUpdateTime().getTime());
+                                                    }
+                                                } else {
+                                                    if (endDate.getTime() >= device.getEnrolmentInfo().getLastBilledDate()) {
+                                                        deviceStatusIsValid = true;
+                                                        dateDiff = dateDiff + (endDate.getTime() - device.getEnrolmentInfo().getLastBilledDate());
+                                                    }
+                                                }
+                                            } else {
+                                                if (device.getEnrolmentInfo().getLastBilledDate() <= deviceStatus.get(i).getUpdateTime().getTime()
+                                                        && endDate.getTime() >= deviceStatus.get(i).getUpdateTime().getTime()) {
+                                                    deviceStatusIsValid = true;
+                                                    dateDiff = dateDiff + (endDate.getTime() - deviceStatus.get(i).getUpdateTime().getTime());
+                                                }
+                                                if (device.getEnrolmentInfo().getLastBilledDate() >= deviceStatus.get(i).getUpdateTime().getTime()
+                                                        && endDate.getTime() >= device.getEnrolmentInfo().getLastBilledDate()) {
+                                                    deviceStatusIsValid = true;
+                                                    dateDiff = dateDiff + (endDate.getTime() - device.getEnrolmentInfo().getLastBilledDate());
+                                                }
+                                            }
+                                        }
+                                    }
+                                }
+
+                                long dateInDays = TimeUnit.DAYS.convert(dateDiff, TimeUnit.MILLISECONDS);
+                                double cost = (tenantCost.getCost() / 365) * dateInDays;
+                                totalCost = cost + totalCost;
+                                device.setCost(Math.round(cost * 100.0) / 100.0);
+                                device.setDaysUsed((int) dateInDays);
+
+                                if (generateBill) {
+                                    enrollmentDAO.updateEnrollmentLastBilledDate(device.getEnrolmentInfo(), endDate, tenantId);
+                                    billingDAO.addBilling(device.getId(), tenantId, startDate, endDate);
+                                    DeviceManagementDAOFactory.commitTransaction();
+                                }
+
+                            } else {
+
+                                for (int i = 0; i < deviceStatus.size(); i++) {
+                                    if (endDate.getTime() >= deviceStatus.get(i).getUpdateTime().getTime()
+                                            && startDate.getTime() <= deviceStatus.get(i).getUpdateTime().getTime()) {
+                                        deviceStatusIsValid = true;
+                                    }
+                                }
+                                if (device.getEnrolmentInfo().getLastBilledDate() != 0) {
+                                    Date date = new Date(device.getEnrolmentInfo().getLastBilledDate());
+                                    Format format = new SimpleDateFormat("yyyy MM dd");
+
+                                    for (String lastBillDate : lastBilledDatesList) {
+                                        if (!lastBillDate.equals(format.format(date))) {
+                                            lastBilledDatesList.add(format.format(date));
+                                        }
+                                    }
+                                }
+                                removeBillingPeriodInvalidDevices.add(device);
+                            }
+
+                            if (!deviceStatusIsValid) {
+                                removeStatusUpdateInvalidDevices.add(device);
+                            }
+                        }
+
+                    }
+                }
+            }
+        } catch (DeviceManagementDAOException e) {
+            String msg = "Error occurred while retrieving device list pertaining to the current tenant";
+            log.error(msg, e);
+            throw new DeviceManagementException(msg, e);
+        } catch (Exception e) {
+            String msg = "Error occurred in getAllDevices";
+            log.error(msg, e);
+            throw new DeviceManagementException(msg, e);
+        } finally {
+            DeviceManagementDAOFactory.closeConnection();
+            MetadataManagementDAOFactory.closeConnection();
+        }
+
+        if(!removeBillingPeriodInvalidDevices.isEmpty() && removeBillingPeriodInvalidDevices.size() == allDevices.size()) {
+            allDevicesBilledDateIsValid = false;
+            paginationResult.setMessage("Invalid bill period.");
+        }
+        if(!removeStatusUpdateInvalidDevices.isEmpty() && removeStatusUpdateInvalidDevices.size() == allDevices.size()) {
+            allDevicesBilledDateIsValid = false;
+            if (paginationResult.getMessage() != null){
+                paginationResult.setMessage(paginationResult.getMessage() + " and no device updates within entered bill period.");
+            } else {
+                paginationResult.setMessage("Devices have not been updated within the given period or entered end date comes before the " +
+                        "last billed date.");
+            }
+
+        }
+        allDevices.removeAll(removeBillingPeriodInvalidDevices);
+        allDevices.removeAll(removeStatusUpdateInvalidDevices);
+
+        paginationResult.setBilledDateIsValid(allDevicesBilledDateIsValid);
+        paginationResult.setData(allDevices);
+        paginationResult.setTotalCost(Math.round(totalCost * 100.0) / 100.0);
+        return paginationResult;
+    }
+
+    @Override
+    public PaginationResult getAllDevicesBillings(PaginationRequest request, int tenantId, String tenantDomain, Timestamp startDate, Timestamp endDate, boolean generateBill) throws DeviceManagementException {
+        if (request == null) {
+            String msg = "Received incomplete pagination request for method getAllDeviceBillings";
+            log.error(msg);
+            throw new DeviceManagementException(msg);
+        }
+
+        DeviceManagerUtil.validateDeviceListPageSize(request);
+        PaginationResult paginationResult = new PaginationResult();
+        List<Device> allDevices;
+        int count = 0;
+
+        try {
+            DeviceManagementDAOFactory.beginTransaction();
+            allDevices = deviceDAO.getDevices(request, tenantId);
+            count = deviceDAO.getDeviceCount(request, tenantId);
+            paginationResult = calculateCost(tenantId, tenantDomain, startDate, endDate, generateBill, allDevices);
+
+        } catch (DeviceManagementDAOException e) {
+            String msg = "Error occurred while retrieving device bill list pertaining to the current tenant";
+            log.error(msg, e);
+            throw new DeviceManagementException(msg, e);
+        } catch (Exception e) {
+            String msg = "Error occurred in getAllDevicesBillings";
+            log.error(msg, e);
+            throw new DeviceManagementException(msg, e);
+        }
+        paginationResult.setRecordsFiltered(count);
+        paginationResult.setRecordsTotal(count);
+        return paginationResult;
+    }
+
+    @Override
+    public PaginationResult createBillingFile(int tenantId, String tenantDomain, Timestamp startDate, Timestamp endDate, boolean generateBill) throws DeviceManagementException {
+        PaginationResult paginationResult = new PaginationResult();
+        List<Device> allDevices;
+        try {
+            DeviceManagementDAOFactory.beginTransaction();
+            allDevices = deviceDAO.getDeviceListWithoutPagination(tenantId);
+            paginationResult = calculateCost(tenantId, tenantDomain, startDate, endDate, generateBill, allDevices);
+
+        } catch (DeviceManagementDAOException e) {
+            String msg = "Error occurred while retrieving device bill list without pagination pertaining to the current tenant";
+            log.error(msg, e);
+            throw new DeviceManagementException(msg, e);
+        } catch (Exception e) {
+            String msg = "Error occurred in createBillingFile";
+            log.error(msg, e);
+            throw new DeviceManagementException(msg, e);
+        }
+        return paginationResult;
+    }
+
     @Override
     public PaginationResult getAllDevices(PaginationRequest request, boolean requireDeviceInfo) throws DeviceManagementException {
         if (request == null) {
@@ -1768,14 +1992,15 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
             DeviceManagementDAOFactory.closeConnection();
         }
     }
+
     @Override
-    public List<DeviceStatus> getDeviceStatusHistory(Device device, Date fromDate, Date toDate) throws DeviceManagementException{
+    public List<DeviceStatus> getDeviceStatusHistory(Device device, Date fromDate, Date toDate, boolean billingStatus) throws DeviceManagementException {
         if (log.isDebugEnabled()) {
             log.debug("get status history of device: " + device.getDeviceIdentifier());
         }
         try {
             int tenantId = this.getTenantId();
-            return deviceStatusDAO.getStatus(device.getId(), tenantId, fromDate, toDate);
+            return deviceStatusDAO.getStatus(device.getId(), tenantId, fromDate, toDate, billingStatus);
         } catch (DeviceManagementDAOException e) {
             DeviceManagementDAOFactory.rollbackTransaction();
             String msg = "Error occurred while retrieving status history";
@@ -1789,7 +2014,7 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
     }
 
     @Override
-    public List<DeviceStatus> getDeviceCurrentEnrolmentStatusHistory(Device device, Date fromDate, Date toDate) throws DeviceManagementException{
+    public List<DeviceStatus> getDeviceCurrentEnrolmentStatusHistory(Device device, Date fromDate, Date toDate) throws DeviceManagementException {
         if (log.isDebugEnabled()) {
             log.debug("get status history of device: " + device.getDeviceIdentifier());
         }
@@ -1818,12 +2043,12 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
     }
 
     @Override
-    public List<DeviceStatus> getDeviceStatusHistory(Device device) throws DeviceManagementException{
+    public List<DeviceStatus> getDeviceStatusHistory(Device device) throws DeviceManagementException {
-        return getDeviceStatusHistory(device, null, null);
+        return getDeviceStatusHistory(device, null, null, false);
     }
 
     @Override
-    public List<DeviceStatus> getDeviceCurrentEnrolmentStatusHistory(Device device) throws DeviceManagementException{
+    public List<DeviceStatus> getDeviceCurrentEnrolmentStatusHistory(Device device) throws DeviceManagementException {
         return getDeviceCurrentEnrolmentStatusHistory(device, null, null);
     }
 
@@ -3240,7 +3465,7 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
 
     @Override
     public List<DeviceLocationHistorySnapshot> getDeviceLocationInfo(DeviceIdentifier deviceIdentifier, long from,
-            long to) throws DeviceManagementException {
+                                                                     long to) throws DeviceManagementException {
         if (log.isDebugEnabled()) {
             log.debug("Get device location information");
         }
@@ -4395,12 +4620,12 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
 
     @Override
     public void triggerCorrectiveActions(String deviceIdentifier, String featureCode, List<String> actions,
-            List<ConfigurationEntry> configList) throws DeviceManagementException, DeviceNotFoundException {
+                                         List<ConfigurationEntry> configList) throws DeviceManagementException, DeviceNotFoundException {
         if (log.isDebugEnabled()) {
             log.debug("Triggering Corrective action. Device Identifier: " + deviceIdentifier);
         }
 
-        if (StringUtils.isBlank(featureCode)){
+        if (StringUtils.isBlank(featureCode)) {
             String msg = "Found a Blan feature code: " + featureCode;
             log.error(msg);
             throw new BadRequestException(msg);
@@ -4476,10 +4701,10 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
     }
 
     @Override
-    public License getLicenseConfig (String deviceTypeName) throws DeviceManagementException {
+    public License getLicenseConfig(String deviceTypeName) throws DeviceManagementException {
         DeviceManagementService deviceManagementService =
                 pluginRepository.getDeviceManagementService(deviceTypeName,
-                this.getTenantId());
+                        this.getTenantId());
         if (deviceManagementService == null) {
             String msg = "Device management service loading is failed for the device type: " + deviceTypeName;
             log.error(msg);

features/device-mgt/org.wso2.carbon.device.mgt.basics.feature/src/main/resources/conf/mdm-ui-config.xml

@@ -24,6 +24,14 @@
     <SessionTimeOut>3600</SessionTimeOut>
     <!--  maximum number of login cache entries  -->
     <LoginCacheCapacity>10000</LoginCacheCapacity>
+    <Billing>
+        <HideBillGenerationInSuperTenant>false</HideBillGenerationInSuperTenant>
+        <HideBillGenerationInSubTenant>false</HideBillGenerationInSubTenant>
+        <HideTotalCalculationInSuperTenant>false</HideTotalCalculationInSuperTenant>
+        <HideTotalCalculationInSubTenant>false</HideTotalCalculationInSubTenant>
+        <HideDomainSelectionInSuperTenant>false</HideDomainSelectionInSuperTenant>
+        <HideDomainSelectionInSubTenant>true</HideDomainSelectionInSubTenant>
+    </Billing>
     <AppRegistration>
         <Tags>
             <Tag>analytics_management</Tag>

features/device-mgt/org.wso2.carbon.device.mgt.basics.feature/src/main/resources/dbscripts/cdm/h2.sql

@@ -52,6 +52,17 @@ CREATE TABLE IF NOT EXISTS DM_DEVICE (
      CONSTRAINT uk_DM_DEVICE UNIQUE (NAME, DEVICE_TYPE_ID, DEVICE_IDENTIFICATION, TENANT_ID)
 );
 
+CREATE TABLE IF NOT EXISTS DM_BILLING (
+    INVOICE_ID    INTEGER auto_increment NOT NULL,
+    TENANT_ID     INTEGER default 0,
+    DEVICE_ID     INT     default NULL,
+    BILLING_START TIMESTAMP not null,
+    BILLING_END   TIMESTAMP not null,
+    PRIMARY KEY (INVOICE_ID),
+    CONSTRAINT FK_DM_BILLING_DM_DEVICE
+        FOREIGN KEY (DEVICE_ID) REFERENCES DM_DEVICE (ID)
+);
+
 CREATE TABLE IF NOT EXISTS DM_DEVICE_PROPERTIES (
      DEVICE_TYPE_NAME VARCHAR(300) NOT NULL,
      DEVICE_IDENTIFICATION VARCHAR(300) NOT NULL,
@@ -103,6 +114,7 @@ CREATE TABLE IF NOT EXISTS DM_ENROLMENT (
     DATE_OF_ENROLMENT TIMESTAMP DEFAULT NULL,
     DATE_OF_LAST_UPDATE TIMESTAMP DEFAULT NULL,
     TENANT_ID INT NOT NULL,
+    LAST_BILLED_DATE BIGINT DEFAULT 0,
     PRIMARY KEY (ID),
     CONSTRAINT fk_dm_device_enrolment FOREIGN KEY (DEVICE_ID) REFERENCES
     DM_DEVICE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION,

features/device-mgt/org.wso2.carbon.device.mgt.basics.feature/src/main/resources/dbscripts/cdm/mssql.sql

@@ -66,6 +66,18 @@ CREATE TABLE DM_DEVICE (
      REFERENCES DM_DEVICE_TYPE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION
 );
 
+IF NOT  EXISTS (SELECT * FROM SYS.OBJECTS WHERE OBJECT_ID = OBJECT_ID(N'[DBO].[DM_BILLING]') AND TYPE IN (N'U'))
+CREATE TABLE DM_BILLING (
+     INVOICE_ID INTEGER IDENTITY(1,1) NOT NULL,
+     TENANT_ID INTEGER DEFAULT 0,
+     DEVICE_ID INTEGER DEFAULT NULL,
+     BILLING_START DATETIME2 NOT NULL,
+     BILLING_END DATETIME2 NOT NULL,
+     PRIMARY KEY (INVOICE_ID),
+     CONSTRAINT FK_DM_BILLING_DM_DEVICE2 FOREIGN KEY (DEVICE_ID)
+     REFERENCES DM_DEVICE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION
+);
+
 IF NOT  EXISTS (SELECT * FROM SYS.OBJECTS WHERE OBJECT_ID = OBJECT_ID(N'[DBO].[DM_DEVICE_PROPERTIES]') AND TYPE IN (N'U'))
 CREATE TABLE DM_DEVICE_PROPERTIES (
      DEVICE_TYPE_NAME VARCHAR(300) NOT NULL,
@@ -146,6 +158,7 @@ CREATE TABLE DM_ENROLMENT (
     DATE_OF_ENROLMENT DATETIME2 DEFAULT NULL,
     DATE_OF_LAST_UPDATE DATETIME2 DEFAULT NULL,
     TENANT_ID INTEGER NOT NULL,
+    LAST_BILLED_DATE BIGINT DEFAULT 0,
     PRIMARY KEY (ID),
     CONSTRAINT FK_DM_DEVICE_ENROLMENT FOREIGN KEY (DEVICE_ID) REFERENCES
     DM_DEVICE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION

features/device-mgt/org.wso2.carbon.device.mgt.basics.feature/src/main/resources/dbscripts/cdm/mysql.sql

@@ -59,6 +59,17 @@ CREATE TABLE IF NOT EXISTS DM_DEVICE (
      REFERENCES DM_DEVICE_TYPE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION
 )ENGINE = InnoDB;
 
+CREATE TABLE IF NOT EXISTS DM_BILLING (
+    INVOICE_ID INTEGER AUTO_INCREMENT NOT NULL,
+    TENANT_ID INTEGER DEFAULT 0,
+    DEVICE_ID INTEGER DEFAULT NULL,
+    BILLING_START TIMESTAMP NOT NULL,
+    BILLING_END TIMESTAMP NOT NULL,
+    PRIMARY KEY (INVOICE_ID),
+    CONSTRAINT fk_DM_BILLING_DM_DEVICE2 FOREIGN KEY (DEVICE_ID)
+        REFERENCES DM_DEVICE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION
+)ENGINE = InnoDB;
+
 CREATE INDEX IDX_DM_DEVICE ON DM_DEVICE(TENANT_ID, DEVICE_TYPE_ID);
 CREATE INDEX IDX_DM_DEVICE_TYPE_ID_DEVICE_IDENTIFICATION ON DM_DEVICE(TENANT_ID, DEVICE_TYPE_ID,DEVICE_IDENTIFICATION);
 
@@ -118,6 +129,7 @@ CREATE TABLE IF NOT EXISTS DM_ENROLMENT (
     DATE_OF_ENROLMENT TIMESTAMP NULL DEFAULT NULL,
     DATE_OF_LAST_UPDATE TIMESTAMP NULL DEFAULT NULL,
     TENANT_ID INT NOT NULL,
+    LAST_BILLED_DATE BIGINT DEFAULT 0,
     PRIMARY KEY (ID),
     CONSTRAINT FK_DM_DEVICE_ENROLMENT FOREIGN KEY (DEVICE_ID) REFERENCES
     DM_DEVICE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION

features/device-mgt/org.wso2.carbon.device.mgt.basics.feature/src/main/resources/dbscripts/cdm/oracle.sql

@@ -124,6 +124,19 @@ WHEN (NEW.ID IS NULL)
   END;
 /
 
+CREATE TABLE DM_BILLING (
+    INVOICE_ID NUMBER(10) NOT NULL,
+    TENANT_ID NUMBER(10) DEFAULT 0,
+    DEVICE_ID NUMBER(10) DEFAULT NULL,
+    BILLING_START TIMESTAMP NOT NULL,
+    BILLING_END TIMESTAMP NOT NULL,
+    CONSTRAINT PK_DM_BILLING PRIMARY KEY (INVOICE_ID),
+    CONSTRAINT fk_DM_BILLING_DM_DEVICE2
+        FOREIGN KEY (DEVICE_ID)
+            REFERENCES DM_DEVICE (ID)
+)
+/
+
 CREATE TABLE DM_DEVICE_PROPERTIES (
      DEVICE_TYPE_NAME VARCHAR2(300) NOT NULL,
      DEVICE_IDENTIFICATION VARCHAR2(300) NOT NULL,
@@ -208,6 +221,7 @@ CREATE TABLE DM_ENROLMENT (
   DATE_OF_ENROLMENT TIMESTAMP(0) DEFAULT NULL,
   DATE_OF_LAST_UPDATE TIMESTAMP(0) DEFAULT NULL,
   TENANT_ID NUMBER(10) NOT NULL,
+  LAST_BILLED_DATE BIGINT DEFAULT 0,
   CONSTRAINT PK_DM_ENROLMENT PRIMARY KEY (ID),
   CONSTRAINT FK_DM_DEVICE_ENROLMENT FOREIGN KEY (DEVICE_ID) REFERENCES
     DM_DEVICE (ID)

features/device-mgt/org.wso2.carbon.device.mgt.basics.feature/src/main/resources/dbscripts/cdm/postgresql.sql

@@ -57,6 +57,17 @@ CREATE TABLE IF NOT EXISTS DM_DEVICE (
      REFERENCES DM_DEVICE_TYPE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION
 );
 
+CREATE TABLE IF NOT EXISTS DM_BILLING (
+    INVOICE_ID INTEGER DEFAULT NEXTVAL ('DM_BILLING_seq') NOT NULL,
+    TENANT_ID INTEGER DEFAULT 0,
+    DEVICE_ID INTEGER DEFAULT NULL,
+    BILLING_START TIMESTAMP(0) NOT NULL,
+    BILLING_END TIMESTAMP(0) NOT NULL,
+    PRIMARY KEY (INVOICE_ID),
+    CONSTRAINT fk_DM_BILLING_DM_DEVICE2 FOREIGN KEY (DEVICE_ID)
+    REFERENCES DM_DEVICE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION
+    );
+
 CREATE INDEX IDX_DM_DEVICE ON DM_DEVICE(TENANT_ID, DEVICE_TYPE_ID);
 CREATE INDEX IDX_DM_DEVICE_TYPE_ID_DEVICE_IDENTIFICATION ON DM_DEVICE(TENANT_ID, DEVICE_TYPE_ID,DEVICE_IDENTIFICATION);
 
@@ -116,6 +127,7 @@ CREATE TABLE IF NOT EXISTS DM_ENROLMENT (
     DATE_OF_ENROLMENT TIMESTAMP(0) NULL DEFAULT NULL,
     DATE_OF_LAST_UPDATE TIMESTAMP(0) NULL DEFAULT NULL,
     TENANT_ID INTEGER NOT NULL,
+    LAST_BILLED_DATE BIGINT DEFAULT 0,
     PRIMARY KEY (ID),
     CONSTRAINT FK_DM_DEVICE_ENROLMENT FOREIGN KEY (DEVICE_ID) REFERENCES
         DM_DEVICE (ID) ON DELETE NO ACTION ON UPDATE NO ACTION