fixes https://gitlab.com/entgra/product-iots/-/issues/1226

Adding the new billing API

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

@@ -35,10 +35,21 @@ public class DeviceList extends BasePaginatedResult {
         return devices;
     }
 
+    @ApiModelProperty(name = "totalCost", value = "Total cost of all devices per tenant", required = false)
+    private double totalCost;
+
     public void setList(List<Device> devices) {
         this.devices = devices;
     }
 
+    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

@@ -343,6 +343,80 @@ 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,
+                    defaultValue = "nita")
+                    String tenantDomain,
+            @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
     @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

@@ -340,6 +340,51 @@ public class DeviceManagementServiceImpl implements DeviceManagementService {
         }
     }
 
+    @GET
+    @Override
+    @Path("/billing")
+    public Response getDevicesBilling(
+            @DefaultValue("nita")
+            @QueryParam ("tenantDomain") String tenantDomain,
+            @QueryParam("offset") int offset,
+            @DefaultValue("10")
+            @QueryParam("limit") int limit) {
+        try {
+            RequestValidationUtil.validatePaginationParameters(offset, limit);
+            DeviceManagementProviderService dms = DeviceMgtAPIUtils.getDeviceManagementService();
+//            DeviceAccessAuthorizationService deviceAccessAuthorizationService =
+//                    DeviceMgtAPIUtils.getDeviceAccessAuthorizationService();
+            PaginationRequest request = new PaginationRequest(offset, limit);
+            PaginationResult result;
+            DeviceList devices = new DeviceList();
+
+            try {
+                result = dms.getAllDevicesBillings(request, true, tenantDomain);
+            } catch (Exception exception) {
+                String msg = "------------------TEST ERROR-----------------------";
+                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.setCount(result.getRecordsTotal());
+            devices.setTotalCost(result.getTotalCost());
+            return Response.status(Response.Status.OK).entity(devices).build();
+        }
+        catch (Exception e) {
+            String msg = "Error occurred while fetching all enrolled devices";
+            log.error(msg, e);
+            return Response.serverError().entity(
+                    new ErrorResponse.ErrorResponseBuilder().setMessage(msg).build()).build();
+        }
+    }
+
     @GET
     @Override
     @Path("/user-devices")

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

@@ -0,0 +1,225 @@
+/*
+ * 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.fasterxml.jackson.annotation.JsonProperty;
+import com.google.gson.Gson;
+import io.swagger.annotations.ApiModel;
+import io.swagger.annotations.ApiModelProperty;
+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 java.io.Serializable;
+import java.util.List;
+
+@ApiModel(value = "DeviceBilling", description = "This class carries all information related to a managed device.")
+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 = "type", value = "The OS type of the device.", required = true)
+//    private String type;
+
+    @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 date to current date.",
+            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 = "features", value = "List of features.", required = false)
+//    private List<Feature> features;
+
+//    private List<DeviceBilling.Property> properties;
+
+    @ApiModelProperty(name = "advanceInfo", value = "This defines the device registration related information. " +
+            "It is mandatory to define this information.", required = false)
+    private DeviceInfo deviceInfo;
+
+//    @ApiModelProperty(name = "applications", value = "This represents the application list installed into the device",
+//    required = false)
+//    private List<Application> applications;
+
+//    @ApiModelProperty(
+//            name = "historySnapshot",
+//            value = "device history snapshots")
+//    @JsonProperty(value = "historySnapshot")
+//    private DeviceLocationHistorySnapshotWrapper historySnapshot;
+
+    public DeviceBilling() {
+    }
+
+    public DeviceBilling(String name, String description, EnrolmentInfo enrolmentInfo) {
+        this.name = name;
+        this.description = description;
+        this.enrolmentInfo = enrolmentInfo;
+    }
+
+    public DeviceBilling(String name, String description, String deviceId, EnrolmentInfo enrolmentInfo) {
+        this.name = name;
+        this.description = description;
+        this.deviceIdentifier = deviceId;
+        this.enrolmentInfo = enrolmentInfo;
+    }
+
+    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;
+    }
+
+    public static class Property {
+
+        private String name;
+        private String value;
+
+        public String getName() {
+            return name;
+        }
+
+        public void setName(String name) {
+            this.name = name;
+        }
+
+        public String getValue() {
+            return value;
+        }
+
+        public void setValue(String value) {
+            this.value = value;
+        }
+    }
+
+    @Override
+    public String toString() {
+        return new Gson().toJson(this);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o)
+            return true;
+        if (!(o instanceof DeviceBilling))
+            return false;
+
+        DeviceBilling device = (DeviceBilling) o;
+
+        return getDeviceIdentifier().equals(device.getDeviceIdentifier());
+
+    }
+
+    @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/PaginationResult.java

@@ -44,6 +44,17 @@ 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;
+
+    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/Costdata.java

@@ -0,0 +1,76 @@
+/*
+ *  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;
+import java.sql.Timestamp;
+import java.util.Date;
+
+@XmlRootElement(name = "Cost")
+public class Costdata {
+
+    private String tenantDomain;
+    private Double cost;
+    private Timestamp subscriptionBeginning;
+    private Timestamp subscriptionEnd;
+
+    @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;
+    }
+
+    @XmlElement(name = "subscriptionBeginning", required = true)
+    public Timestamp getSubscriptionBeginning() {
+        return subscriptionBeginning;
+    }
+
+    public void setSubscriptionBeginning(Timestamp subscriptionBeginning) {
+        this.subscriptionBeginning = subscriptionBeginning;
+    }
+
+    @XmlElement(name = "subscriptionEnd", required = true)
+    public Timestamp getSubscriptionEnd() {
+        return subscriptionEnd;
+    }
+
+    public void setSubscriptionEnd(Timestamp subscriptionEnd) {
+        this.subscriptionEnd = subscriptionEnd;
+    }
+
+    @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/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.DeviceIdentifier;
-import org.wso2.carbon.device.mgt.common.EnrolmentInfo;
+import org.wso2.carbon.device.mgt.common.*;
 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;
@@ -49,7 +45,6 @@ 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.util.Date;
@@ -297,6 +292,26 @@ public interface DeviceDAO {
      */
     List<Device> getDevices(PaginationRequest request, int tenantId) throws DeviceManagementDAOException;
 
+    /**
+     * This method is used to retrieve the not removed devices of a given tenant as a paginated result.
+     *
+     * @param request  PaginationRequest object holding the data for pagination
+     * @param tenantId tenant id.
+     * @return returns paginated list of not removed devices of tenant.
+     * @throws DeviceManagementDAOException
+     */
+    List<DeviceBilling> getDeviceBillList(PaginationRequest request, int tenantId) throws DeviceManagementDAOException;
+
+    /**
+     * This method is used to retrieve the removed devices of a given tenant as a paginated result.
+     *
+     * @param request  PaginationRequest object holding the data for pagination
+     * @param tenantId tenant id.
+     * @return rreturns paginated list of removed devices of tenant.
+     * @throws DeviceManagementDAOException
+     */
+    List<DeviceBilling> getRemovedDeviceBillList(PaginationRequest request, 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/impl/device/GenericDeviceDAOImpl.java

@@ -18,13 +18,9 @@
 
 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;
-import org.wso2.carbon.device.mgt.common.Device;
-import org.wso2.carbon.device.mgt.common.DeviceManagementConstants;
-import org.wso2.carbon.device.mgt.common.PaginationRequest;
+import org.wso2.carbon.device.mgt.common.*;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceInfo;
 import org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOException;
 import org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOFactory;
@@ -187,6 +183,62 @@ public class GenericDeviceDAOImpl extends AbstractDeviceDAOImpl {
         }
     }
 
+    @Override
+    public List<DeviceBilling> getDeviceBillList(PaginationRequest request, int tenantId)
+            throws DeviceManagementDAOException {
+        Connection conn;
+        PreparedStatement stmt = null;
+        List<DeviceBilling> devices = new ArrayList<>();
+        try {
+            conn = this.getConnection();
+            String sql ="select DEVICE_IDENTIFICATION, DESCRIPTION, NAME AS DEVICE_NAME, DATE_OF_ENROLMENT, STATUS,\n" +
+                    "TIMESTAMPDIFF('DAY', CURDATE(), DATE_OF_ENROLMENT) as DAYS_SINCE_ENROLLED from DM_DEVICE d, DM_ENROLMENT e\n" +
+                    "where e.TENANT_ID= ? and  d.ID=e.DEVICE_ID and STATUS !='REMOVED' LIMIT 10";
+            stmt = conn.prepareStatement(sql);
+            stmt.setInt(1, tenantId);
+            ResultSet rs = stmt.executeQuery();
+
+            while (rs.next()) {
+                DeviceBilling device = DeviceManagementDAOUtil.loadDeviceBilling(rs, false);
+                devices.add(device);
+            }
+        } catch (SQLException e) {
+            throw new DeviceManagementDAOException("Error occurred while fetching the list of devices belongs to '" +
+                    request.getOwner() + "'", e);
+        } finally {
+            DeviceManagementDAOUtil.cleanupResources(stmt, null);
+        }
+        return devices;
+    }
+
+    @Override
+    public List<DeviceBilling> getRemovedDeviceBillList(PaginationRequest request, int tenantId)
+            throws DeviceManagementDAOException {
+        Connection conn;
+        PreparedStatement stmt = null;
+        List<DeviceBilling> devices = new ArrayList<>();
+        try {
+            conn = this.getConnection();
+            String sql = "select DEVICE_IDENTIFICATION, DESCRIPTION, NAME AS DEVICE_NAME, DATE_OF_ENROLMENT, DATE_OF_LAST_UPDATE, STATUS, " +
+                    "TIMESTAMPDIFF('DAY', DATE_OF_ENROLMENT, DATE_OF_LAST_UPDATE) AS DAYS_USED from DM_DEVICE d, DM_ENROLMENT e" +
+                    " where e.TENANT_ID=? and d.ID=e.DEVICE_ID and STATUS ='REMOVED'\n";
+            stmt = conn.prepareStatement(sql);
+            stmt.setInt(1, tenantId);
+            ResultSet rs = stmt.executeQuery();
+
+            while (rs.next()) {
+                DeviceBilling device = DeviceManagementDAOUtil.loadDeviceBilling(rs, true);
+                devices.add(device);
+            }
+        } catch (SQLException e) {
+            throw new DeviceManagementDAOException("Error occurred while fetching the list of devices belongs to '" +
+                    request.getOwner() + "'", 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 +188,16 @@ public class OracleDeviceDAOImpl extends AbstractDeviceDAOImpl {
         }
     }
 
+    @Override
+    public List<DeviceBilling> getRemovedDeviceBillList(PaginationRequest request, int tenantId) throws DeviceManagementDAOException {
+        return null;
+    }
+
+    @Override
+    public List<DeviceBilling> getDeviceBillList(PaginationRequest request, 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 +179,16 @@ public class PostgreSQLDeviceDAOImpl extends AbstractDeviceDAOImpl {
         }
     }
 
+    @Override
+    public List<DeviceBilling> getRemovedDeviceBillList(PaginationRequest request, int tenantId) throws DeviceManagementDAOException {
+        return null;
+    }
+
+    @Override
+    public List<DeviceBilling> getDeviceBillList(PaginationRequest request, 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 +189,16 @@ public class SQLServerDeviceDAOImpl extends AbstractDeviceDAOImpl {
         }
     }
 
+    @Override
+    public List<DeviceBilling> getRemovedDeviceBillList(PaginationRequest request, int tenantId) throws DeviceManagementDAOException {
+        return null;
+    }
+
+    @Override
+    public List<DeviceBilling> getDeviceBillList(PaginationRequest request, 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

@@ -26,6 +26,7 @@ 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;
@@ -152,6 +153,16 @@ public final class DeviceManagementDAOUtil {
         return enrolmentInfo;
     }
 
+    public static EnrolmentInfo loadEnrolmentBilling(ResultSet rs, Boolean removedDevices) throws SQLException {
+        EnrolmentInfo enrolmentInfo = new EnrolmentInfo();
+        enrolmentInfo.setDateOfEnrolment(rs.getTimestamp("DATE_OF_ENROLMENT").getTime());
+        enrolmentInfo.setStatus(EnrolmentInfo.Status.valueOf(rs.getString("STATUS")));
+        if (removedDevices) {
+            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);
@@ -197,6 +208,20 @@ public final class DeviceManagementDAOUtil {
         return device;
     }
 
+    public static DeviceBilling loadDeviceBilling(ResultSet rs, Boolean removedDevices) throws SQLException {
+        DeviceBilling device = new DeviceBilling();
+        device.setName(rs.getString("DEVICE_NAME"));
+        device.setDescription(rs.getString("DESCRIPTION"));
+        device.setDeviceIdentifier(rs.getString("DEVICE_IDENTIFICATION"));
+        if (removedDevices) {
+            device.setDaysUsed((int) rs.getLong("DAYS_USED"));
+        } else {
+            device.setDaysSinceEnrolled((int) rs.getLong("DAYS_SINCE_ENROLLED"));
+        }
+        device.setEnrolmentInfo(loadEnrolmentBilling(rs, removedDevices));
+        return device;
+    }
+
     public static DeviceMonitoringData loadDevice(ResultSet rs, String deviceTypeName) throws SQLException {
         Device device = new Device();
         device.setId(rs.getInt("DEVICE_ID"));

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

@@ -36,23 +36,13 @@
 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.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.*;
 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;
 import org.wso2.carbon.device.mgt.common.configuration.mgt.DeviceConfiguration;
 import org.wso2.carbon.device.mgt.common.configuration.mgt.PlatformConfiguration;
+import org.wso2.carbon.device.mgt.common.cost.mgt.Costdata;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceData;
 import org.wso2.carbon.device.mgt.common.configuration.mgt.ConfigurationEntry;
 import org.wso2.carbon.device.mgt.common.device.details.DeviceLocationHistorySnapshot;
@@ -79,6 +69,7 @@ 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.util.Collection;
 import java.util.Date;
 import java.util.List;
 import java.util.Map;
@@ -207,6 +198,27 @@ 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 List<DeviceBilling> - Result includes the cost of removed device list.
+     * @throws DeviceManagementException If some unusual behaviour is observed while fetching the
+     *                                   devices.
+     */
+    List<DeviceBilling> getRemovedDeviceListWithCost(PaginationResult paginationResult, PaginationRequest request, Collection<Costdata> costdata, String tenantDomain, Double totalCost) throws DeviceManagementException;
+    /**
+     * Method to retrieve all the devices with pagination support.
+     *
+     * @param request PaginationRequest object holding the data for pagination
+     * @param requireDeviceInfo - A boolean indicating whether the device-info (location, app-info etc) is also required
+     *                          along with the device data.
+     * @return PaginationResult - Result including the required parameters necessary to do pagination.
+     * @throws DeviceManagementException If some unusual behaviour is observed while fetching the
+     *                                   devices.
+     */
+    PaginationResult getAllDevicesBillings(PaginationRequest request, boolean requireDeviceInfo, String tenantDomain) throws DeviceManagementException;
+
     /**
      * Returns the device of specified id.
      *

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.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.*;
 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.Costdata;
 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;
@@ -133,6 +120,8 @@ 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;
@@ -150,17 +139,9 @@ 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.util.Calendar;
-import java.util.Collections;
-import java.util.Date;
-import java.util.Enumeration;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Properties;
+import java.util.*;
 import java.util.stream.Collectors;
 
 //import org.wso2.carbon.device.mgt.analytics.data.publisher.exception.DataPublisherConfigurationException;
@@ -176,6 +157,7 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
     private final DeviceTypeDAO deviceTypeDAO;
     private final EnrollmentDAO enrollmentDAO;
     private final ApplicationDAO applicationDAO;
+    private MetadataDAO metadataDAO;
 
     public DeviceManagementProviderServiceImpl() {
         this.pluginRepository = new DeviceManagementPluginRepository();
@@ -183,6 +165,7 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
         this.applicationDAO = DeviceManagementDAOFactory.getApplicationDAO();
         this.deviceTypeDAO = DeviceManagementDAOFactory.getDeviceTypeDAO();
         this.enrollmentDAO = DeviceManagementDAOFactory.getEnrollmentDAO();
+        this.metadataDAO = MetadataManagementDAOFactory.getMetadataDAO();
 
         /* Registering a listener to retrieve events when some device management service plugin is installed after
          * the component is done getting initialized */
@@ -954,6 +937,106 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
         return this.getAllDevices(request, true);
     }
 
+    @Override
+    public List<DeviceBilling> getRemovedDeviceListWithCost(PaginationResult paginationResult, PaginationRequest request, Collection<Costdata> costdata, String tenantDomain, Double totalCost) throws DeviceManagementException {
+        List<DeviceBilling> allRemovedDevices;
+        int tenantId = this.getTenantId();
+        try {
+            allRemovedDevices =  deviceDAO.getRemovedDeviceBillList(request,tenantId);
+            for (Costdata test: costdata) {
+                if (test.getTenantDomain().equals(tenantDomain)) {
+                    for (DeviceBilling device: allRemovedDevices) {
+                        long dateDiff = device.getEnrolmentInfo().getDateOfLastUpdate()-device.getEnrolmentInfo().getDateOfEnrolment();
+                        long dateInDays = dateDiff / (1000*60*60*24);
+                        double cost = (test.getCost()/365)*dateInDays;
+                        totalCost = cost + totalCost;
+                        device.setCost(cost);
+                    }
+                }
+            }
+            paginationResult.setTotalCost(totalCost);
+        } 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 get devices";
+            log.error(msg, e);
+            throw new DeviceManagementException(msg, e);
+        }
+
+        return allRemovedDevices;
+    }
+
+    @Override
+    public PaginationResult getAllDevicesBillings(PaginationRequest request, boolean requireDeviceInfo, String tenantDomain) throws DeviceManagementException {
+        if (request == null) {
+            String msg = "Received incomplete pagination request for method getAllDeviceBillings";
+            log.error(msg);
+            throw new DeviceManagementException(msg);
+        }
+        if (log.isDebugEnabled()) {
+            log.debug("Get devices with pagination " + request.toString() + " and requiredDeviceInfo: " + requireDeviceInfo);
+        }
+
+        PaginationResult paginationResult = new PaginationResult();
+        Double totalCost = 0.0;
+        List<DeviceBilling> allDevices;
+        List<DeviceBilling> allRemovedDevices;
+        int count = 0;
+        int tenantId = this.getTenantId();
+        DeviceManagerUtil.validateDeviceListPageSize(request);
+        try {
+            DeviceManagementDAOFactory.openConnection();
+            allDevices = deviceDAO.getDeviceBillList(request, tenantId);
+            count = deviceDAO.getDeviceCount(request, tenantId);
+
+            String metaKey = "PER_DEVICE_COST";
+            MetadataManagementDAOFactory.openConnection();
+            Metadata metadata = metadataDAO.getMetadata(tenantId, metaKey);
+
+            Gson g = new Gson();
+
+            Type collectionType = new TypeToken<Collection<Costdata>>(){}.getType();
+            Collection<Costdata> costdata = g.fromJson(metadata.getMetaValue(), collectionType);
+
+            for (Costdata test: costdata) {
+                if (test.getTenantDomain().equals(tenantDomain)) {
+                    for (DeviceBilling device: allDevices) {
+                        long dateDiff = test.getSubscriptionEnd().getTime()-device.getEnrolmentInfo().getDateOfEnrolment();
+                        long dateInDays = dateDiff / (1000*60*60*24);
+                        double cost = (test.getCost()/365)*dateInDays;
+                        totalCost = cost + totalCost;
+                        device.setCost(cost);
+                    }
+                }
+            }
+
+            allRemovedDevices = this.getRemovedDeviceListWithCost(paginationResult, request, costdata, tenantDomain, totalCost);
+            allDevices.addAll(allRemovedDevices);
+
+        } 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 (SQLException e) {
+            String msg = "Error occurred while opening a connection to the data source";
+            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();
+        }
+        paginationResult.setData(allDevices);
+        paginationResult.setRecordsFiltered(count);
+        paginationResult.setRecordsTotal(count);
+        return paginationResult;
+    }
+
     @Override
     public PaginationResult getAllDevices(PaginationRequest request, boolean requireDeviceInfo) throws DeviceManagementException {
         if (request == null) {