Add statistics to group based supscription mgt helper

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

@@ -0,0 +1,68 @@
+/*
+ *  Copyright (c) 2018 - 2024, 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 io.entgra.device.mgt.core.application.mgt.common;
+
+public class SubscriptionStatistics {
+    private float completedPercentage;
+    private float failedPercentage;
+    private float pendingPercentage;
+    private float newDevicesPercentage;
+
+    public SubscriptionStatistics() {}
+    public SubscriptionStatistics(float completedPercentage, float failedPercentage, float pendingPercentage,
+                                  float newDevicesPercentage) {
+        this.completedPercentage = completedPercentage;
+        this.failedPercentage = failedPercentage;
+        this.pendingPercentage = pendingPercentage;
+        this.newDevicesPercentage = newDevicesPercentage;
+    }
+
+    public float getCompletedPercentage() {
+        return completedPercentage;
+    }
+
+    public void setCompletedPercentage(float completedPercentage) {
+        this.completedPercentage = completedPercentage;
+    }
+
+    public float getFailedPercentage() {
+        return failedPercentage;
+    }
+
+    public void setFailedPercentage(float failedPercentage) {
+        this.failedPercentage = failedPercentage;
+    }
+
+    public float getPendingPercentage() {
+        return pendingPercentage;
+    }
+
+    public void setPendingPercentage(float pendingPercentage) {
+        this.pendingPercentage = pendingPercentage;
+    }
+
+    public float getNewDevicesPercentage() {
+        return newDevicesPercentage;
+    }
+
+    public void setNewDevicesPercentage(float newDevicesPercentage) {
+        this.newDevicesPercentage = newDevicesPercentage;
+    }
+}

components/application-mgt/io.entgra.device.mgt.core.application.mgt.common/src/main/java/io/entgra/device/mgt/core/application/mgt/common/dto/SubscriptionStatisticDTO.java

@@ -0,0 +1,50 @@
+/*
+ *  Copyright (c) 2018 - 2024, 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 io.entgra.device.mgt.core.application.mgt.common.dto;
+
+public class SubscriptionStatisticDTO {
+    private int completedDeviceCount;
+    private int pendingDevicesCount;
+    private int failedDevicesCount;
+
+    public int getCompletedDeviceCount() {
+        return completedDeviceCount;
+    }
+
+    public void setCompletedDeviceCount(int completedDeviceCount) {
+        this.completedDeviceCount = completedDeviceCount;
+    }
+
+    public int getPendingDevicesCount() {
+        return pendingDevicesCount;
+    }
+
+    public void setPendingDevicesCount(int pendingDevicesCount) {
+        this.pendingDevicesCount = pendingDevicesCount;
+    }
+
+    public int getFailedDevicesCount() {
+        return failedDevicesCount;
+    }
+
+    public void setFailedDevicesCount(int failedDevicesCount) {
+        this.failedDevicesCount = failedDevicesCount;
+    }
+}

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

@@ -20,6 +20,7 @@ package io.entgra.device.mgt.core.application.mgt.core.dao;
 import io.entgra.device.mgt.core.application.mgt.common.ExecutionStatus;
 import io.entgra.device.mgt.core.application.mgt.common.dto.GroupSubscriptionDTO;
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionEntity;
+import io.entgra.device.mgt.core.application.mgt.common.dto.SubscriptionStatisticDTO;
 import io.entgra.device.mgt.core.application.mgt.common.dto.SubscriptionsDTO;
 import io.entgra.device.mgt.core.application.mgt.common.dto.DeviceSubscriptionDTO;
 import io.entgra.device.mgt.core.application.mgt.common.dto.ApplicationReleaseDTO;
@@ -521,4 +522,8 @@ public interface SubscriptionDAO {
      * @throws ApplicationManagementDAOException if connection establishment or SQL execution fails.
      */
     int getUserUnsubscriptionCount(int appReleaseId, int tenantId) throws ApplicationManagementDAOException;
+
+    SubscriptionStatisticDTO getSubscriptionStatistic(String subscriptionType, boolean isUnsubscribed, int tenantId)
+            throws ApplicationManagementDAOException;
+
 }

components/application-mgt/io.entgra.device.mgt.core.application.mgt.core/src/main/java/io/entgra/device/mgt/core/application/mgt/core/dao/impl/subscription/GenericSubscriptionDAOImpl.java

@@ -20,6 +20,7 @@ package io.entgra.device.mgt.core.application.mgt.core.dao.impl.subscription;
 import io.entgra.device.mgt.core.application.mgt.common.dto.GroupSubscriptionDTO;
 import io.entgra.device.mgt.core.application.mgt.common.dto.DeviceOperationDTO;
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionEntity;
+import io.entgra.device.mgt.core.application.mgt.common.dto.SubscriptionStatisticDTO;
 import io.entgra.device.mgt.core.application.mgt.common.dto.SubscriptionsDTO;
 import io.entgra.device.mgt.core.application.mgt.core.dao.SubscriptionDAO;
 import io.entgra.device.mgt.core.application.mgt.core.dao.impl.AbstractDAOImpl;
@@ -47,6 +48,7 @@ import java.util.Calendar;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.StringJoiner;
 import java.util.stream.Collectors;
 
@@ -2654,4 +2656,54 @@ public class GenericSubscriptionDAOImpl extends AbstractDAOImpl implements Subsc
             throw new ApplicationManagementDAOException(msg, e);
         }
     }
+
+    @Override
+    public SubscriptionStatisticDTO getSubscriptionStatistic(String subscriptionType, boolean isUnsubscribed, int tenantId)
+            throws ApplicationManagementDAOException {
+        SubscriptionStatisticDTO subscriptionStatisticDTO = new SubscriptionStatisticDTO();
+        boolean doesAllEntriesRequired = true;
+        try {
+            Connection connection = getDBConnection();
+            String sql = "SELECT COUNT(DISTINCT ID) AS COUNT, " +
+                    "STATUS FROM AP_DEVICE_SUBSCRIPTION WHERE " +
+                    "TENANT_ID = ? AND UNSUBSCRIBED = ?";
+            if (!Objects.equals(subscriptionType, "DEVICE")) {
+                sql = sql + " AND ACTION_TRIGGERED_FROM = ?";
+                doesAllEntriesRequired = false;
+            }
+            sql = sql + " GROUP BY (STATUS)";
+
+            try (PreparedStatement preparedStatement = connection.prepareStatement(sql)) {
+                int idx = 1;
+
+                preparedStatement.setInt(idx++, tenantId);
+                preparedStatement.setBoolean(idx++, isUnsubscribed);
+                if (!doesAllEntriesRequired) {
+                    preparedStatement.setString(idx, subscriptionType);
+                }
+                try (ResultSet resultSet = preparedStatement.executeQuery()) {
+                    while (resultSet.next()) {
+                        int count = resultSet.getInt("COUNT");
+                        String status = resultSet.getString("STATUS");
+                        if (Objects.equals(status, "COMPLETED")) {
+                            subscriptionStatisticDTO.setCompletedDeviceCount(count);
+                        } else if (Objects.equals(status, "PENDING")) {
+                            subscriptionStatisticDTO.setPendingDevicesCount(count);
+                        } else {
+                            subscriptionStatisticDTO.setFailedDevicesCount(count);
+                        }
+                    }
+                }
+            }
+            return subscriptionStatisticDTO;
+        } catch (DBConnectionException e) {
+            String msg = "Error occurred while obtaining the DB connection for getting subscription statistics";
+            log.error(msg, e);
+            throw new ApplicationManagementDAOException(msg, e);
+        } catch (SQLException e) {
+            String msg = "Error occurred while running SQL for getting subscription statistics";
+            log.error(msg, e);
+            throw new ApplicationManagementDAOException(msg, e);
+        }
+    }
 }

components/application-mgt/io.entgra.device.mgt.core.application.mgt.core/src/main/java/io/entgra/device/mgt/core/application/mgt/core/util/subscription/mgt/SubscriptionManagementHelperUtil.java

@@ -23,11 +23,14 @@ import io.entgra.device.mgt.core.application.mgt.common.DeviceSubscription;
 import io.entgra.device.mgt.core.application.mgt.common.DeviceSubscriptionFilterCriteria;
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionData;
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionInfo;
+import io.entgra.device.mgt.core.application.mgt.common.SubscriptionStatistics;
 import io.entgra.device.mgt.core.application.mgt.common.dto.DeviceSubscriptionDTO;
+import io.entgra.device.mgt.core.application.mgt.common.dto.SubscriptionStatisticDTO;
 import io.entgra.device.mgt.core.application.mgt.core.util.HelperUtil;
 import io.entgra.device.mgt.core.device.mgt.common.Device;
 import io.entgra.device.mgt.core.device.mgt.common.PaginationRequest;
 import io.entgra.device.mgt.core.device.mgt.common.exceptions.DeviceManagementException;
+import org.jetbrains.annotations.NotNull;
 
 import java.sql.Timestamp;
 import java.util.ArrayList;
@@ -63,11 +66,7 @@ public class SubscriptionManagementHelperUtil {
                 deviceSubscription.setDeviceStatus(device.getEnrolmentInfo().getStatus().name());
                 deviceSubscription.setOwnershipType(device.getEnrolmentInfo().getOwnership().name());
                 deviceSubscription.setDateOfLastUpdate(new Timestamp(device.getEnrolmentInfo().getDateOfLastUpdate()));
-                SubscriptionData subscriptionData = new SubscriptionData();
-                subscriptionData.setTriggeredBy(isUnsubscribed ? deviceSubscriptionDTO.getUnsubscribedBy() :
-                        deviceSubscriptionDTO.getSubscribedBy());
-                subscriptionData.setTriggeredAt(deviceSubscriptionDTO.getSubscribedTimestamp());
-                subscriptionData.setSubscriptionType(deviceSubscriptionDTO.getStatus());
+                SubscriptionData subscriptionData = getSubscriptionData(isUnsubscribed, deviceSubscriptionDTO);
                 deviceSubscription.setSubscriptionData(subscriptionData);
                 deviceSubscriptions.add(deviceSubscription);
             }
@@ -75,6 +74,16 @@ public class SubscriptionManagementHelperUtil {
         return deviceSubscriptions;
     }
 
+    private static SubscriptionData getSubscriptionData(boolean isUnsubscribed, DeviceSubscriptionDTO deviceSubscriptionDTO) {
+        SubscriptionData subscriptionData = new SubscriptionData();
+        subscriptionData.setTriggeredBy(isUnsubscribed ? deviceSubscriptionDTO.getUnsubscribedBy() :
+                deviceSubscriptionDTO.getSubscribedBy());
+        subscriptionData.setTriggeredAt(deviceSubscriptionDTO.getSubscribedTimestamp());
+        subscriptionData.setDeviceSubscriptionStatus(deviceSubscriptionDTO.getStatus());
+        subscriptionData.setSubscriptionType(deviceSubscriptionDTO.getActionTriggeredFrom());
+        return subscriptionData;
+    }
+
     public static String getDeviceSubscriptionStatus(SubscriptionInfo subscriptionInfo) {
         return getDeviceSubscriptionStatus(subscriptionInfo.getDeviceSubscriptionFilterCriteria().
                         getFilteringDeviceSubscriptionStatus(), subscriptionInfo.getDeviceSubscriptionStatus());
@@ -84,4 +93,22 @@ public class SubscriptionManagementHelperUtil {
         return (deviceSubscriptionStatusFilter != null && !deviceSubscriptionStatusFilter.isEmpty()) ?
                 deviceSubscriptionStatusFilter : deviceSubscriptionStatus;
     }
+
+    public static SubscriptionStatistics getSubscriptionStatistics(SubscriptionStatisticDTO subscriptionStatisticDTO, int allDeviceCount) {
+        SubscriptionStatistics subscriptionStatistics = new SubscriptionStatistics();
+        subscriptionStatistics.setCompletedPercentage(
+                getPercentage(subscriptionStatisticDTO.getCompletedDeviceCount(), allDeviceCount));
+        subscriptionStatistics.setPendingPercentage(
+                getPercentage(subscriptionStatisticDTO.getPendingDevicesCount(), allDeviceCount));
+        subscriptionStatistics.setFailedPercentage(
+                getPercentage(subscriptionStatisticDTO.getFailedDevicesCount(), allDeviceCount));
+        return subscriptionStatistics;
+    }
+
+    public static float getPercentage(int numerator, int denominator) {
+        if (denominator <= 0) {
+            return 0.0f;
+        }
+        return (float) numerator/denominator;
+    }
 }

components/application-mgt/io.entgra.device.mgt.core.application.mgt.core/src/main/java/io/entgra/device/mgt/core/application/mgt/core/util/subscription/mgt/impl/DeviceBasedSubscriptionManagementHelperServiceImpl.java

@@ -25,6 +25,7 @@ import io.entgra.device.mgt.core.application.mgt.common.DeviceSubscriptionFilter
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionEntity;
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionInfo;
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionResponse;
+import io.entgra.device.mgt.core.application.mgt.common.SubscriptionStatistics;
 import io.entgra.device.mgt.core.application.mgt.common.dto.ApplicationReleaseDTO;
 import io.entgra.device.mgt.core.application.mgt.common.dto.DeviceSubscriptionDTO;
 import io.entgra.device.mgt.core.application.mgt.common.dto.SubscriptionsDTO;
@@ -135,7 +136,8 @@ public class DeviceBasedSubscriptionManagementHelperServiceImpl implements Subsc
     }
 
     @Override
-    public void getSubscriptionStatistics() throws ApplicationManagementException {
-        // todo: analytics engine
+    public SubscriptionStatistics getSubscriptionStatistics(SubscriptionInfo subscriptionInfo) throws ApplicationManagementException {
+        return null;
     }
+
 }

components/application-mgt/io.entgra.device.mgt.core.application.mgt.core/src/main/java/io/entgra/device/mgt/core/application/mgt/core/util/subscription/mgt/impl/GroupBasedSubscriptionManagementHelperServiceImpl.java

@@ -25,9 +25,11 @@ import io.entgra.device.mgt.core.application.mgt.common.DeviceSubscriptionFilter
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionEntity;
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionInfo;
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionResponse;
+import io.entgra.device.mgt.core.application.mgt.common.SubscriptionStatistics;
 import io.entgra.device.mgt.core.application.mgt.common.dto.ApplicationDTO;
 import io.entgra.device.mgt.core.application.mgt.common.dto.ApplicationReleaseDTO;
 import io.entgra.device.mgt.core.application.mgt.common.dto.DeviceSubscriptionDTO;
+import io.entgra.device.mgt.core.application.mgt.common.dto.SubscriptionStatisticDTO;
 import io.entgra.device.mgt.core.application.mgt.common.exception.ApplicationManagementException;
 import io.entgra.device.mgt.core.application.mgt.common.exception.DBConnectionException;
 import io.entgra.device.mgt.core.application.mgt.core.exception.ApplicationManagementDAOException;
@@ -44,6 +46,7 @@ import io.entgra.device.mgt.core.device.mgt.core.service.DeviceManagementProvide
 import io.entgra.device.mgt.core.device.mgt.core.service.GroupManagementProviderService;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.jetbrains.annotations.NotNull;
 import org.wso2.carbon.context.PrivilegedCarbonContext;
 
 import java.util.List;
@@ -126,7 +129,7 @@ public class GroupBasedSubscriptionManagementHelperServiceImpl implements Subscr
                 deviceSubscriptionDTOS = subscriptionDAO.getSubscriptionDetailsByDeviceIds(applicationReleaseDTO.getId(),
                         isUnsubscribe, tenantId, deviceIdsOwnByGroup, subscriptionInfo.getDeviceSubscriptionStatus(),
                         subscriptionInfo.getSubscriptionType(), deviceSubscriptionFilterCriteria.getTriggeredBy(),
-                        null, limit, offset);
+                        null, -1, -1);
 
                 deviceCount = subscriptionDAO.getDeviceSubscriptionCount(applicationReleaseDTO.getId(), isUnsubscribe, tenantId,
                         subscriptionInfo.getDeviceSubscriptionStatus(), subscriptionInfo.getSubscriptionType(),
@@ -179,7 +182,26 @@ public class GroupBasedSubscriptionManagementHelperServiceImpl implements Subscr
     }
 
     @Override
-    public void getSubscriptionStatistics() throws ApplicationManagementException {
-        // todo: analytics engine
+    public SubscriptionStatistics getSubscriptionStatistics(SubscriptionInfo subscriptionInfo)
+            throws ApplicationManagementException {
+        final boolean isUnsubscribe = Objects.equals("unsubscribe", subscriptionInfo.getSubscriptionStatus());
+        int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId();
+        try {
+            ConnectionManagerUtil.openDBConnection();
+            SubscriptionStatisticDTO subscriptionStatisticDTO = subscriptionDAO.
+                    getSubscriptionStatistic(subscriptionInfo.getSubscriptionType(), isUnsubscribe, tenantId);
+            int allDeviceCount = HelperUtil.getGroupManagementProviderService().getDeviceCount(subscriptionInfo.getIdentifier());
+            return SubscriptionManagementHelperUtil.getSubscriptionStatistics(subscriptionStatisticDTO, allDeviceCount);
+        } catch (ApplicationManagementDAOException e) {
+            String msg = "Error encountered while getting subscription statistics for group: " + subscriptionInfo.getIdentifier();
+            log.error(msg, e);
+            throw new ApplicationManagementException(msg, e);
+        } catch (GroupManagementException e) {
+            String msg = "Error encountered while getting device subscription for group: " + subscriptionInfo.getIdentifier();
+            log.error(msg, e);
+            throw new ApplicationManagementException(msg, e);
+        } finally {
+            ConnectionManagerUtil.closeDBConnection();
+        }
     }
 }

components/application-mgt/io.entgra.device.mgt.core.application.mgt.core/src/main/java/io/entgra/device/mgt/core/application/mgt/core/util/subscription/mgt/impl/RoleBasedSubscriptionManagementHelperServiceImpl.java

@@ -25,6 +25,7 @@ import io.entgra.device.mgt.core.application.mgt.common.DeviceSubscriptionFilter
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionEntity;
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionInfo;
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionResponse;
+import io.entgra.device.mgt.core.application.mgt.common.SubscriptionStatistics;
 import io.entgra.device.mgt.core.application.mgt.common.dto.ApplicationReleaseDTO;
 import io.entgra.device.mgt.core.application.mgt.common.dto.DeviceSubscriptionDTO;
 import io.entgra.device.mgt.core.application.mgt.common.exception.ApplicationManagementException;
@@ -179,7 +180,7 @@ public class RoleBasedSubscriptionManagementHelperServiceImpl implements Subscri
     }
 
     @Override
-    public void getSubscriptionStatistics() throws ApplicationManagementException {
-        // todo: analytics engine
+    public SubscriptionStatistics getSubscriptionStatistics(SubscriptionInfo subscriptionInfo) throws ApplicationManagementException {
+        return null;
     }
 }

components/application-mgt/io.entgra.device.mgt.core.application.mgt.core/src/main/java/io/entgra/device/mgt/core/application/mgt/core/util/subscription/mgt/impl/UserBasedSubscriptionManagementHelperServiceImpl.java

@@ -24,6 +24,7 @@ import io.entgra.device.mgt.core.application.mgt.common.DeviceSubscriptionFilter
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionEntity;
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionInfo;
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionResponse;
+import io.entgra.device.mgt.core.application.mgt.common.SubscriptionStatistics;
 import io.entgra.device.mgt.core.application.mgt.common.dto.ApplicationReleaseDTO;
 import io.entgra.device.mgt.core.application.mgt.common.dto.DeviceSubscriptionDTO;
 import io.entgra.device.mgt.core.application.mgt.common.exception.ApplicationManagementException;
@@ -165,7 +166,8 @@ public class UserBasedSubscriptionManagementHelperServiceImpl implements Subscri
     }
 
     @Override
-    public void getSubscriptionStatistics() throws ApplicationManagementException {
+    public SubscriptionStatistics getSubscriptionStatistics(SubscriptionInfo subscriptionInfo) throws ApplicationManagementException {
         // todo: analytics engine
+        return null;
     }
 }

components/application-mgt/io.entgra.device.mgt.core.application.mgt.core/src/main/java/io/entgra/device/mgt/core/application/mgt/core/util/subscription/mgt/service/SubscriptionManagementHelperService.java

@@ -24,6 +24,7 @@ import io.entgra.device.mgt.core.application.mgt.common.DeviceSubscriptionData;
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionEntity;
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionInfo;
 import io.entgra.device.mgt.core.application.mgt.common.SubscriptionResponse;
+import io.entgra.device.mgt.core.application.mgt.common.SubscriptionStatistics;
 import io.entgra.device.mgt.core.application.mgt.common.dto.DeviceSubscriptionDTO;
 import io.entgra.device.mgt.core.application.mgt.common.dto.SubscriptionsDTO;
 import io.entgra.device.mgt.core.application.mgt.common.exception.ApplicationManagementException;
@@ -42,5 +43,6 @@ public interface SubscriptionManagementHelperService {
             throws ApplicationManagementException;
     SubscriptionResponse getSubscriptions(SubscriptionInfo subscriptionInfo, int limit, int offset)
             throws ApplicationManagementException;
-    void getSubscriptionStatistics() throws ApplicationManagementException;
+    SubscriptionStatistics getSubscriptionStatistics(SubscriptionInfo subscriptionInfo)
+            throws ApplicationManagementException;
 }

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

@@ -488,4 +488,5 @@ public interface GroupDAO {
                                                int tenantId, String deviceOwner, String deviceName, String deviceStatus, int offset, int limit)
             throws GroupManagementDAOException;
 
+    int getDeviceCount(String groupName, int tenantId) throws GroupManagementDAOException;
 }

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

@@ -1556,4 +1556,29 @@ public abstract class AbstractGroupDAOImpl implements GroupDAO {
             throw new GroupManagementDAOException(msg, e);
         }
     }
+
+    @Override
+    public int getDeviceCount(String groupName, int tenantId) throws GroupManagementDAOException {
+        int deviceCount = 0;
+        try {
+            Connection connection = GroupManagementDAOFactory.getConnection();
+            String sql = "SELECT COUNT(d.ID) AS COUNT FROM DM_GROUP d INNER JOIN " +
+                    "DM_DEVICE_GROUP_MAP m ON  " +
+                    "d.ID = m.GROUP_ID WHERE TENANT_ID = ? AND d.GROUP_NAME = ?";
+            try (PreparedStatement preparedStatement = connection.prepareStatement(sql)) {
+                preparedStatement.setInt(1, tenantId);
+                preparedStatement.setString(2, groupName);
+                try (ResultSet resultSet = preparedStatement.executeQuery()) {
+                    if (resultSet.next()) {
+                        deviceCount = resultSet.getInt("COUNT");
+                    }
+                }
+            }
+            return deviceCount;
+        } catch (SQLException e) {
+            String msg = "Error occurred while retrieving device count for the group: " + groupName;
+            log.error(msg, e);
+            throw new GroupManagementDAOException(msg, e);
+        }
+    }
 }

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

@@ -30,6 +30,7 @@ import io.entgra.device.mgt.core.device.mgt.common.group.mgt.GroupAlreadyExistEx
 import io.entgra.device.mgt.core.device.mgt.common.group.mgt.GroupManagementException;
 import io.entgra.device.mgt.core.device.mgt.common.group.mgt.GroupNotExistException;
 import io.entgra.device.mgt.core.device.mgt.common.group.mgt.RoleDoesNotExistException;
+import io.entgra.device.mgt.core.device.mgt.core.dao.GroupManagementDAOException;
 import io.entgra.device.mgt.core.device.mgt.core.dto.GroupDetailsDTO;
 import org.wso2.carbon.user.api.AuthorizationManager;
 import org.wso2.carbon.user.api.UserStoreManager;
@@ -389,4 +390,6 @@ public interface GroupManagementProviderService {
     GroupDetailsDTO getGroupDetailsWithDevices(String groupName, int deviceTypeId, String deviceOwner, String deviceName, String deviceStatus,
                                                int offset, int limit) throws GroupManagementException;
 
+    int getDeviceCount(String groupName) throws GroupManagementException;
+
 }

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

@@ -1725,4 +1725,18 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
         return groupDetailsWithDevices;
     }
 
+    @Override
+    public int getDeviceCount(String groupName) throws GroupManagementException {
+        int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId();
+        try {
+            GroupManagementDAOFactory.openConnection();
+            return groupDAO.getDeviceCount(groupName, tenantId);
+        } catch (SQLException | GroupManagementDAOException e) {
+            String msg = "Error occurred while retrieving device count.";
+            log.error(msg, e);
+            throw new GroupManagementException(msg, e);
+        } finally {
+            GroupManagementDAOFactory.closeConnection();
+        }
+    }
 }