Fix incorrect instantiations of Provider Services

components/device-mgt-extensions/org.wso2.carbon.device.mgt.extensions.push.notification.provider.fcm/src/main/java/org/wso2/carbon/device/mgt/extensions/push/notification/provider/fcm/FCMNotificationStrategy.java

@@ -95,7 +95,7 @@ public class FCMNotificationStrategy implements NotificationStrategy {
         OutputStream os = null;
         byte[] bytes = getFCMRequest(message, getFCMToken(device.getProperties())).getBytes();
 
-        HttpURLConnection conn;
+        HttpURLConnection conn = null;
         try {
             conn = (HttpURLConnection) new URL(FCM_ENDPOINT).openConnection();
             conn.setRequestProperty("Content-Type", "application/json");
@@ -108,6 +108,9 @@ public class FCMNotificationStrategy implements NotificationStrategy {
             if (os != null) {
                 os.close();
             }
+            if (conn != null) {
+                conn.disconnect();
+            }
         }
         int status = conn.getResponseCode();
         if (log.isDebugEnabled()) {

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

@@ -270,8 +270,7 @@ public class DeviceManagementPluginRepository implements DeviceManagerStartupLis
         return tenantProviders;
     }
 
-    private void registerPushNotificationStrategy(DeviceManagementService deviceManagementService)
+    private void registerPushNotificationStrategy(DeviceManagementService deviceManagementService) {
-            throws DeviceManagementException {
         PrivilegedCarbonContext.startTenantFlow();
         PrivilegedCarbonContext.getThreadLocalCarbonContext().setTenantDomain(
                 deviceManagementService.getProvisioningConfig().getProviderTenantDomain(), true);

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/device/details/mgt/impl/DeviceInformationManagerImpl.java

@@ -66,7 +66,7 @@ import java.util.Map;
 public class DeviceInformationManagerImpl implements DeviceInformationManager {
 
     private final DeviceDetailsDAO deviceDetailsDAO;
-    private DeviceDAO deviceDAO;
+    private final DeviceDAO deviceDAO;
     private static final Log log = LogFactory.getLog(DeviceInformationManagerImpl.class);
     private static final String LOCATION_EVENT_STREAM_DEFINITION = "org.wso2.iot.LocationStream";
     private static final String DEVICE_INFO_EVENT_STREAM_DEFINITION = "org.wso2.iot.DeviceInfoStream";

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

@@ -27,6 +27,7 @@ import org.wso2.carbon.device.mgt.common.operation.mgt.OperationManager;
 import org.wso2.carbon.device.mgt.common.spi.DeviceTypeGeneratorService;
 import org.wso2.carbon.device.mgt.core.app.mgt.config.AppManagementConfig;
 import org.wso2.carbon.device.mgt.core.config.license.LicenseConfig;
+import org.wso2.carbon.device.mgt.core.device.details.mgt.DeviceInformationManager;
 import org.wso2.carbon.device.mgt.core.dto.DeviceType;
 import org.wso2.carbon.device.mgt.core.dto.DeviceTypeServiceIdentifier;
 import org.wso2.carbon.device.mgt.core.privacy.PrivacyComplianceProvider;
@@ -48,10 +49,11 @@ import java.util.Map;
 
 public class DeviceManagementDataHolder {
 
-    private static DeviceManagementDataHolder thisInstance = new DeviceManagementDataHolder();
+    private static final DeviceManagementDataHolder thisInstance = new DeviceManagementDataHolder();
     private RealmService realmService;
     private TenantManager tenantManager;
     private DeviceManagementProviderService deviceManagerProvider;
+    private DeviceInformationManager deviceInformationManager;
     private LicenseManager licenseManager;
     private RegistryService registryService;
     private LicenseConfig licenseConfig;
@@ -59,7 +61,7 @@ public class DeviceManagementDataHolder {
     private AppManagementConfig appManagerConfig;
     private OperationManager operationManager;
     private ConfigurationContextService configurationContextService;
-    private HashMap<String,Boolean> requireDeviceAuthorization = new HashMap<>();
+    private final HashMap<String,Boolean> requireDeviceAuthorization = new HashMap<>();
     private DeviceAccessAuthorizationService deviceAccessAuthorizationService;
     private GroupManagementProviderService groupManagementProviderService;
     private TaskService taskService;
@@ -69,10 +71,10 @@ public class DeviceManagementDataHolder {
     private DeviceStatusTaskManagerService deviceStatusTaskManagerService;
     private DeviceTypeGeneratorService deviceTypeGeneratorService;
     private PrivacyComplianceProvider privacyComplianceProvider;
-    private Map<DeviceType, DeviceStatusTaskPluginConfig> deviceStatusTaskPluginConfigs = Collections.synchronizedMap(
+    private final Map<DeviceType, DeviceStatusTaskPluginConfig> deviceStatusTaskPluginConfigs = Collections.synchronizedMap(
-            new HashMap<DeviceType, DeviceStatusTaskPluginConfig>());
+            new HashMap<>());
 
-    private Map<String, OperationMonitoringTaskConfig> map = new HashMap<>();
+    private final Map<String, OperationMonitoringTaskConfig> map = new HashMap<>();
 
     public Map<String, OperationMonitoringTaskConfig> getMap(){
         return this.map;
@@ -276,4 +278,12 @@ public class DeviceManagementDataHolder {
     public void setPrivacyComplianceProvider(PrivacyComplianceProvider privacyComplianceProvider) {
         this.privacyComplianceProvider = privacyComplianceProvider;
     }
+
+    public DeviceInformationManager getDeviceInformationManager() {
+        return deviceInformationManager;
+    }
+
+    public void setDeviceInformationManager(DeviceInformationManager deviceInformationManager) {
+        this.deviceInformationManager = deviceInformationManager;
+    }
 }

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

@@ -133,10 +133,10 @@ import java.util.concurrent.TimeUnit;
 public class DeviceManagementServiceComponent {
 
     private static final Object LOCK = new Object();
-    private static Log log = LogFactory.getLog(DeviceManagementServiceComponent.class);
+    private static final Log log = LogFactory.getLog(DeviceManagementServiceComponent.class);
-    private static List<PluginInitializationListener> listeners = new ArrayList<>();
+    private static final List<PluginInitializationListener> listeners = new ArrayList<>();
-    private static List<DeviceManagementService> deviceManagers = new ArrayList<>();
+    private static final List<DeviceManagementService> deviceManagers = new ArrayList<>();
-    private static List<DeviceManagerStartupListener> startupListeners = new ArrayList<>();
+    private static final List<DeviceManagerStartupListener> startupListeners = new ArrayList<>();
 
     public static void registerPluginInitializationListener(PluginInitializationListener listener) {
         synchronized (LOCK) {
@@ -340,7 +340,10 @@ public class DeviceManagementServiceComponent {
         PermissionManagerService permissionManagerService = PermissionManagerServiceImpl.getInstance();
         bundleContext.registerService(PermissionManagerService.class.getName(), permissionManagerService, null);
 
-        bundleContext.registerService(DeviceInformationManager.class, new DeviceInformationManagerImpl(), null);
+        DeviceInformationManager deviceInformationManager = new DeviceInformationManagerImpl();
+        bundleContext.registerService(DeviceInformationManager.class, deviceInformationManager, null);
+        DeviceManagementDataHolder.getInstance().setDeviceInformationManager(deviceInformationManager);
+
         bundleContext.registerService(SearchManagerService.class, new SearchManagerServiceImpl(), null);
     }
 

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

@@ -63,7 +63,6 @@ import org.wso2.carbon.device.mgt.common.device.details.DeviceLocationHistorySna
 import org.wso2.carbon.device.mgt.common.enrollment.notification.EnrollmentNotificationConfiguration;
 import org.wso2.carbon.device.mgt.common.enrollment.notification.EnrollmentNotifier;
 import org.wso2.carbon.device.mgt.common.enrollment.notification.EnrollmentNotifierException;
-import org.wso2.carbon.device.mgt.common.exceptions.BadRequestException;
 import org.wso2.carbon.device.mgt.common.exceptions.DeviceManagementException;
 import org.wso2.carbon.device.mgt.common.exceptions.DeviceNotFoundException;
 import org.wso2.carbon.device.mgt.common.exceptions.DeviceTypeNotFoundException;
@@ -103,7 +102,6 @@ import org.wso2.carbon.device.mgt.core.dao.EnrollmentDAO;
 import org.wso2.carbon.device.mgt.core.dao.util.DeviceManagementDAOUtil;
 import org.wso2.carbon.device.mgt.core.device.details.mgt.DeviceDetailsMgtException;
 import org.wso2.carbon.device.mgt.core.device.details.mgt.DeviceInformationManager;
-import org.wso2.carbon.device.mgt.core.device.details.mgt.impl.DeviceInformationManagerImpl;
 import org.wso2.carbon.device.mgt.core.dto.DeviceType;
 import org.wso2.carbon.device.mgt.core.dto.DeviceTypeServiceIdentifier;
 import org.wso2.carbon.device.mgt.core.dto.DeviceTypeVersion;
@@ -149,7 +147,6 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
 
     private static final String OPERATION_RESPONSE_EVENT_STREAM_DEFINITION = "org.wso2.iot.OperationResponseStream";
     private final DeviceManagementPluginRepository pluginRepository;
-    private final DeviceInformationManager deviceInformationManager;
     private final DeviceDAO deviceDAO;
     private final DeviceTypeDAO deviceTypeDAO;
     private final EnrollmentDAO enrollmentDAO;
@@ -157,8 +154,6 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
 
     public DeviceManagementProviderServiceImpl() {
         this.pluginRepository = new DeviceManagementPluginRepository();
-        this.deviceInformationManager = new DeviceInformationManagerImpl();
-
         this.deviceDAO = DeviceManagementDAOFactory.getDeviceDAO();
         this.applicationDAO = DeviceManagementDAOFactory.getApplicationDAO();
         this.deviceTypeDAO = DeviceManagementDAOFactory.getDeviceTypeDAO();
@@ -399,6 +394,8 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
         extractDeviceLocationToUpdate(device);
         try {
             if (device.getDeviceInfo() != null) {
+                DeviceInformationManager deviceInformationManager = DeviceManagementDataHolder
+                        .getInstance().getDeviceInformationManager();
                 deviceInformationManager.addDeviceInfo(device, device.getDeviceInfo());
             }
         } catch (DeviceDetailsMgtException e) {
@@ -2838,7 +2835,8 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
         if (log.isDebugEnabled()) {
             log.debug("Add device:" + deviceIdentifier.getId() + " to default group");
         }
-        GroupManagementProviderService groupManagementProviderService = new GroupManagementProviderServiceImpl();
+        GroupManagementProviderService groupManagementProviderService = DeviceManagementDataHolder
+                .getInstance().getGroupManagementProviderService();
         try {
             DeviceGroup defaultGroup = createDefaultGroup(groupManagementProviderService, ownership.toString());
             if (defaultGroup != null) {
@@ -3103,6 +3101,8 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
         }
         DeviceInfo info;
         try {
+            DeviceInformationManager deviceInformationManager = DeviceManagementDataHolder
+                    .getInstance().getDeviceInformationManager();
             info = deviceInformationManager.getDeviceInfo(device);
         } catch (DeviceDetailsMgtException e) {
             String msg = "Error occurred while retrieving advance info of '" + device.getType() +
@@ -3402,6 +3402,8 @@ public class DeviceManagementProviderServiceImpl implements DeviceManagementProv
      * @param device Device object
      */
     private void extractDeviceLocationToUpdate(Device device) {
+        DeviceInformationManager deviceInformationManager = DeviceManagementDataHolder
+                .getInstance().getDeviceInformationManager();
         List<Device.Property> properties = device.getProperties();
         if (properties != null) {
             String latitude = null;

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

@@ -55,10 +55,10 @@ import java.util.Map;
 
 public class GroupManagementProviderServiceImpl implements GroupManagementProviderService {
 
-    private static Log log = LogFactory.getLog(GroupManagementProviderServiceImpl.class);
+    private static final Log log = LogFactory.getLog(GroupManagementProviderServiceImpl.class);
 
-    private GroupDAO groupDAO;
+    private final GroupDAO groupDAO;
-    private DeviceDAO deviceDAO;
+    private final DeviceDAO deviceDAO;
 
     /**
      * Set groupDAO from GroupManagementDAOFactory when class instantiate.
@@ -912,9 +912,21 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
             log.debug("Get groups of device " + deviceIdentifier.getId());
         }
         int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId();
-        DeviceManagementProviderService managementProviderService = new DeviceManagementProviderServiceImpl();
+        DeviceManagementProviderService managementProviderService = DeviceManagementDataHolder
+                .getInstance().getDeviceManagementProvider();
+        Device device;
+        try {
+            device = managementProviderService.getDevice(deviceIdentifier, false);
+        } catch (DeviceManagementException e) {
+            String msg = "Error occurred while retrieving device groups.";
+            log.error(msg, e);
+            throw new GroupManagementException(msg, e);
+        }
+        return getDeviceGroups(requireGroupProps, tenantId, device);
+    }
+
+    private List<DeviceGroup> getDeviceGroups(boolean requireGroupProps, int tenantId, Device device) throws GroupManagementException {
         try {
-            Device device = managementProviderService.getDevice(deviceIdentifier, false);
             GroupManagementDAOFactory.openConnection();
             List<DeviceGroup> deviceGroups = groupDAO.getGroups(device.getId(), tenantId);
             if (requireGroupProps) {
@@ -925,7 +937,7 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
                 }
             }
             return deviceGroups;
-        } catch (DeviceManagementException | GroupManagementDAOException | SQLException e) {
+        } catch (GroupManagementDAOException | SQLException e) {
             String msg = "Error occurred while retrieving device groups.";
             log.error(msg, e);
             throw new GroupManagementException(msg, e);
@@ -950,28 +962,7 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
             log.debug("Get groups of device " + device.getDeviceIdentifier());
         }
         int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId();
-        try {
+        return getDeviceGroups(requireGroupProps, tenantId, device);
-            GroupManagementDAOFactory.openConnection();
-            List<DeviceGroup> deviceGroups = groupDAO.getGroups(device.getId(), tenantId);
-            if (requireGroupProps) {
-                if (deviceGroups != null && !deviceGroups.isEmpty()) {
-                    for (DeviceGroup group : deviceGroups) {
-                        populateGroupProperties(group, tenantId);
-                    }
-                }
-            }
-            return deviceGroups;
-        } catch (GroupManagementDAOException | SQLException e) {
-            String msg = "Error occurred while retrieving device groups.";
-            log.error(msg, e);
-            throw new GroupManagementException(msg, e);
-        } catch (Exception e) {
-            String msg = "Error occurred in getGroups";
-            log.error(msg, e);
-            throw new GroupManagementException(msg, e);
-        } finally {
-            GroupManagementDAOFactory.closeConnection();
-        }
     }
 
     /**

components/device-mgt/org.wso2.carbon.device.mgt.core/src/test/java/org/wso2/carbon/device/mgt/core/service/DeviceManagementProviderServiceTest.java

@@ -77,6 +77,7 @@ import org.wso2.carbon.device.mgt.core.config.DeviceConfigurationManager;
 import org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOFactory;
 import org.wso2.carbon.device.mgt.core.device.details.mgt.dao.DeviceDetailsDAO;
 import org.wso2.carbon.device.mgt.core.device.details.mgt.dao.DeviceDetailsMgtDAOException;
+import org.wso2.carbon.device.mgt.core.device.details.mgt.impl.DeviceInformationManagerImpl;
 import org.wso2.carbon.device.mgt.core.dto.DeviceType;
 import org.wso2.carbon.device.mgt.core.internal.DeviceManagementDataHolder;
 import org.wso2.carbon.device.mgt.core.internal.DeviceManagementServiceComponent;
@@ -124,6 +125,7 @@ public class DeviceManagementProviderServiceTest extends BaseDeviceManagementTes
         DeviceManagementDataHolder.getInstance().setRegistryService(getRegistryService());
         DeviceManagementDataHolder.getInstance().setDeviceAccessAuthorizationService(new DeviceAccessAuthorizationServiceImpl());
         DeviceManagementDataHolder.getInstance().setGroupManagementProviderService(new GroupManagementProviderServiceImpl());
+        DeviceManagementDataHolder.getInstance().setDeviceInformationManager(new DeviceInformationManagerImpl());
         DeviceManagementDataHolder.getInstance().setDeviceTaskManagerService(null);
         deviceMgtService.registerDeviceType(new TestDeviceManagementService(DEVICE_TYPE,
                 MultitenantConstants.SUPER_TENANT_DOMAIN_NAME));

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/main/java/org/wso2/carbon/policy/mgt/core/PolicyManagerServiceImpl.java

@@ -69,9 +69,9 @@ public class PolicyManagerServiceImpl implements PolicyManagerService {
 
     private static final Log log = LogFactory.getLog(PolicyManagerServiceImpl.class);
 
-    PolicyAdministratorPoint policyAdministratorPoint;
+    private final PolicyAdministratorPoint policyAdministratorPoint;
-    MonitoringManager monitoringManager;
+    private final MonitoringManager monitoringManager;
-    private PolicyManager policyManager;
+    private final PolicyManager policyManager;
 
     public PolicyManagerServiceImpl() {
         policyAdministratorPoint = new PolicyAdministratorPointImpl();

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/main/java/org/wso2/carbon/policy/mgt/core/enforcement/PolicyEnforcementDelegatorImpl.java

@@ -41,15 +41,14 @@ import org.wso2.carbon.device.mgt.common.DeviceIdentifier;
 import org.wso2.carbon.device.mgt.common.exceptions.InvalidDeviceException;
 import org.wso2.carbon.device.mgt.common.operation.mgt.Operation;
 import org.wso2.carbon.device.mgt.common.operation.mgt.OperationManagementException;
+import org.wso2.carbon.device.mgt.common.policy.mgt.Policy;
 import org.wso2.carbon.device.mgt.core.operation.mgt.CommandOperation;
 import org.wso2.carbon.device.mgt.core.operation.mgt.OperationMgtConstants;
-import org.wso2.carbon.device.mgt.common.policy.mgt.Policy;
 import org.wso2.carbon.policy.mgt.common.PolicyAdministratorPoint;
 import org.wso2.carbon.policy.mgt.common.PolicyEvaluationException;
 import org.wso2.carbon.policy.mgt.common.PolicyManagementException;
 import org.wso2.carbon.policy.mgt.common.PolicyTransformException;
 import org.wso2.carbon.policy.mgt.core.PolicyManagerService;
-import org.wso2.carbon.policy.mgt.core.PolicyManagerServiceImpl;
 import org.wso2.carbon.policy.mgt.core.internal.PolicyManagementDataHolder;
 import org.wso2.carbon.policy.mgt.core.util.PolicyManagerUtil;
 
@@ -60,8 +59,8 @@ public class PolicyEnforcementDelegatorImpl implements PolicyEnforcementDelegato
 
     private static final Log log = LogFactory.getLog(PolicyEnforcementDelegatorImpl.class);
 
-    private List<Device> devices;
+    private final List<Device> devices;
-    private List<Integer> updatedPolicyIds;
+    private final List<Integer> updatedPolicyIds;
 
     public PolicyEnforcementDelegatorImpl(List<Device> devices, List<Integer> updatedPolicyIds) {
 
@@ -75,7 +74,6 @@ public class PolicyEnforcementDelegatorImpl implements PolicyEnforcementDelegato
         }
         this.devices = devices;
         this.updatedPolicyIds = updatedPolicyIds;
-
     }
 
     @Override
@@ -111,7 +109,8 @@ public class PolicyEnforcementDelegatorImpl implements PolicyEnforcementDelegato
     @Override
     public Policy getEffectivePolicy(DeviceIdentifier identifier) throws PolicyDelegationException {
         try {
-            PolicyManagerService policyManagerService = new PolicyManagerServiceImpl();
+            PolicyManagerService policyManagerService = PolicyManagementDataHolder.getInstance()
+                    .getPolicyManagerService();
             PolicyAdministratorPoint policyAdministratorPoint;
 
             Policy policy = policyManagerService.getPEP().getEffectivePolicy(identifier);
@@ -124,11 +123,7 @@ public class PolicyEnforcementDelegatorImpl implements PolicyEnforcementDelegato
             }
             return policy;
             //return PolicyManagementDataHolder.getInstance().getPolicyEvaluationPoint().getEffectivePolicy(identifier);
-        } catch (PolicyEvaluationException e) {
+        } catch (PolicyEvaluationException | PolicyManagementException e) {
-            String msg = "Error occurred while retrieving the effective policy for devices.";
-            log.error(msg, e);
-            throw new PolicyDelegationException(msg, e);
-        } catch (PolicyManagementException e) {
             String msg = "Error occurred while retrieving the effective policy for devices.";
             log.error(msg, e);
             throw new PolicyDelegationException(msg, e);
@@ -199,7 +194,8 @@ public class PolicyEnforcementDelegatorImpl implements PolicyEnforcementDelegato
      */
     public Policy getAppliedPolicyToDevice(Device device) throws PolicyDelegationException {
         try {
-            PolicyManagerService policyManagerService = new PolicyManagerServiceImpl();
+            PolicyManagerService policyManagerService = PolicyManagementDataHolder.getInstance()
+                    .getPolicyManagerService();
             return policyManagerService.getAppliedPolicyToDevice(device);
         } catch (PolicyManagementException e) {
             String msg = "Error occurred while retrieving the applied policy for devices.";

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/main/java/org/wso2/carbon/policy/mgt/core/impl/PolicyInformationPointImpl.java

@@ -40,17 +40,19 @@ 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.DeviceIdentifier;
+import org.wso2.carbon.device.mgt.common.Feature;
 import org.wso2.carbon.device.mgt.common.exceptions.DeviceManagementException;
 import org.wso2.carbon.device.mgt.common.group.mgt.DeviceGroup;
 import org.wso2.carbon.device.mgt.common.group.mgt.GroupManagementException;
 import org.wso2.carbon.device.mgt.common.policy.mgt.Policy;
 import org.wso2.carbon.device.mgt.core.dto.DeviceType;
 import org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderService;
-import org.wso2.carbon.device.mgt.common.Feature;
-import org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderServiceImpl;
 import org.wso2.carbon.device.mgt.core.service.GroupManagementProviderService;
-import org.wso2.carbon.device.mgt.core.service.GroupManagementProviderServiceImpl;
+import org.wso2.carbon.policy.mgt.common.FeatureManagementException;
-import org.wso2.carbon.policy.mgt.common.*;
+import org.wso2.carbon.policy.mgt.common.PIPDevice;
+import org.wso2.carbon.policy.mgt.common.PolicyFilter;
+import org.wso2.carbon.policy.mgt.common.PolicyInformationPoint;
+import org.wso2.carbon.policy.mgt.common.PolicyManagementException;
 import org.wso2.carbon.policy.mgt.core.internal.PolicyManagementDataHolder;
 import org.wso2.carbon.policy.mgt.core.mgt.FeatureManager;
 import org.wso2.carbon.policy.mgt.core.mgt.PolicyManager;
@@ -68,9 +70,9 @@ public class PolicyInformationPointImpl implements PolicyInformationPoint {
 
     private static final Log log = LogFactory.getLog(PolicyInformationPointImpl.class);
 
-    PolicyManager policyManager;
+    private final PolicyManager policyManager;
-    FeatureManager featureManager;
+    private final FeatureManager featureManager;
-    DeviceManagementProviderService deviceManagementService;
+    private final DeviceManagementProviderService deviceManagementService;
 
     public PolicyInformationPointImpl() {
         deviceManagementService =
@@ -85,8 +87,8 @@ public class PolicyInformationPointImpl implements PolicyInformationPoint {
         Device device;
         DeviceType deviceType = new DeviceType();
         deviceType.setName(deviceIdentifier.getType());
-        DeviceManagementProviderService deviceManagementService = new DeviceManagementProviderServiceImpl();
+        GroupManagementProviderService groupManagementProviderService = PolicyManagementDataHolder
-        GroupManagementProviderService groupManagementProviderService = new GroupManagementProviderServiceImpl();
+                .getInstance().getGroupManagementService();
 
         try {
             device = deviceManagementService.getDevice(deviceIdentifier, false);
@@ -184,11 +186,10 @@ public class PolicyInformationPointImpl implements PolicyInformationPoint {
         }
     }
 
-
     private List<Policy> removeDuplicatePolicies(List<List<Policy>> policies) {
 
-        Map<Integer, Policy> map = new HashMap<Integer, Policy>();
+        Map<Integer, Policy> map = new HashMap<>();
-        List<Policy> finalPolicies = new ArrayList<Policy>();
+        List<Policy> finalPolicies = new ArrayList<>();
         for (List<Policy> policyList : policies) {
             for (Policy policy : policyList) {
                 if (!map.containsKey(policy.getId())) {
@@ -200,8 +201,4 @@ public class PolicyInformationPointImpl implements PolicyInformationPoint {
         return finalPolicies;
     }
 
-    private DeviceManagementProviderService getDeviceManagementService() {
-        return new DeviceManagementProviderServiceImpl();
-    }
-
 }

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/main/java/org/wso2/carbon/policy/mgt/core/internal/PolicyManagementDataHolder.java

@@ -18,16 +18,18 @@
 
 package org.wso2.carbon.policy.mgt.core.internal;
 
+import org.wso2.carbon.context.PrivilegedCarbonContext;
 import org.wso2.carbon.device.mgt.core.config.DeviceConfigurationManager;
 import org.wso2.carbon.device.mgt.core.config.policy.PolicyConfiguration;
 import org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderService;
+import org.wso2.carbon.device.mgt.core.service.GroupManagementProviderService;
 import org.wso2.carbon.ntask.core.service.TaskService;
 import org.wso2.carbon.policy.mgt.common.PolicyEvaluationPoint;
 import org.wso2.carbon.policy.mgt.common.PolicyInformationPoint;
+import org.wso2.carbon.policy.mgt.core.PolicyManagerService;
 import org.wso2.carbon.policy.mgt.core.mgt.MonitoringManager;
 import org.wso2.carbon.policy.mgt.core.mgt.PolicyManager;
 import org.wso2.carbon.user.core.service.RealmService;
-import org.wso2.carbon.user.core.tenant.TenantManager;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -35,16 +37,16 @@ import java.util.Map;
 public class PolicyManagementDataHolder {
 
     private RealmService realmService;
-    private TenantManager tenantManager;
+    private final Map<String, PolicyEvaluationPoint> policyEvaluationPoints = new HashMap<>();
-    private PolicyEvaluationPoint policyEvaluationPoint;
-    private Map<String, PolicyEvaluationPoint> policyEvaluationPoints = new HashMap<>();
     private PolicyInformationPoint policyInformationPoint;
     private DeviceManagementProviderService deviceManagementService;
+    private GroupManagementProviderService groupManagementService;
+    private PolicyManagerService policyManagerService;
     private MonitoringManager monitoringManager;
     private PolicyManager policyManager;
     private TaskService taskService;
 
-    private static PolicyManagementDataHolder thisInstance = new PolicyManagementDataHolder();
+    private static final PolicyManagementDataHolder thisInstance = new PolicyManagementDataHolder();
 
     private PolicyManagementDataHolder() {}
 
@@ -74,18 +76,6 @@ public class PolicyManagementDataHolder {
 
     public void setRealmService(RealmService realmService) {
         this.realmService = realmService;
-        this.setTenantManager(realmService);
-    }
-
-    private void setTenantManager(RealmService realmService) {
-        if (realmService == null) {
-            throw new IllegalStateException("Realm service is not initialized properly");
-        }
-        this.tenantManager = realmService.getTenantManager();
-    }
-
-    public TenantManager getTenantManager() {
-        return tenantManager;
     }
 
     public PolicyEvaluationPoint getPolicyEvaluationPoint() {
@@ -127,4 +117,25 @@ public class PolicyManagementDataHolder {
     public void setTaskService(TaskService taskService) {
         this.taskService = taskService;
     }
+
+    public synchronized GroupManagementProviderService getGroupManagementService() {
+        if (groupManagementService == null) {
+            PrivilegedCarbonContext ctx = PrivilegedCarbonContext.getThreadLocalCarbonContext();
+            groupManagementService = (GroupManagementProviderService)
+                    ctx.getOSGiService(GroupManagementProviderService.class, null);
+            if (groupManagementService == null) {
+                String msg = "GroupImpl Management service has not initialized.";
+                throw new IllegalStateException(msg);
+            }
+        }
+        return groupManagementService;
+    }
+
+    public PolicyManagerService getPolicyManagerService() {
+        return policyManagerService;
+    }
+
+    public void setPolicyManagerService(PolicyManagerService policyManagerService) {
+        this.policyManagerService = policyManagerService;
+    }
 }

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/main/java/org/wso2/carbon/policy/mgt/core/internal/PolicyManagementServiceComponent.java

@@ -67,7 +67,7 @@ import org.wso2.carbon.user.core.service.RealmService;
 @SuppressWarnings("unused")
 public class PolicyManagementServiceComponent {
 
-    private static Log log = LogFactory.getLog(PolicyManagementServiceComponent.class);
+    private static final Log log = LogFactory.getLog(PolicyManagementServiceComponent.class);
 
     protected void activate(ComponentContext componentContext) {
 
@@ -77,8 +77,10 @@ public class PolicyManagementServiceComponent {
             DataSourceConfig dsConfig = config.getPolicyManagementRepository().getDataSourceConfig();
             PolicyManagementDAOFactory.init(dsConfig);
 
+            PolicyManagerService policyManagerService = new PolicyManagerServiceImpl();
             componentContext.getBundleContext().registerService(
-                    PolicyManagerService.class.getName(), new PolicyManagerServiceImpl(), null);
+                    PolicyManagerService.class.getName(), policyManagerService, null);
+            PolicyManagementDataHolder.getInstance().setPolicyManagerService(policyManagerService);
 
             PolicyConfiguration policyConfiguration =
                     DeviceConfigurationManager.getInstance().getDeviceManagementConfig().getPolicyConfiguration();

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/main/java/org/wso2/carbon/policy/mgt/core/mgt/impl/PolicyManagerImpl.java

@@ -56,9 +56,7 @@ import org.wso2.carbon.device.mgt.core.config.policy.PolicyConfiguration;
 import org.wso2.carbon.device.mgt.core.operation.mgt.CommandOperation;
 import org.wso2.carbon.device.mgt.core.operation.mgt.OperationMgtConstants;
 import org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderService;
-import org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderServiceImpl;
 import org.wso2.carbon.device.mgt.core.service.GroupManagementProviderService;
-import org.wso2.carbon.device.mgt.core.service.GroupManagementProviderServiceImpl;
 import org.wso2.carbon.policy.mgt.common.*;
 import org.wso2.carbon.policy.mgt.core.cache.impl.PolicyCacheManagerImpl;
 import org.wso2.carbon.policy.mgt.core.dao.*;
@@ -74,12 +72,12 @@ import java.util.*;
 
 public class PolicyManagerImpl implements PolicyManager {
 
-    private PolicyDAO policyDAO;
+    private final PolicyDAO policyDAO;
-    private ProfileDAO profileDAO;
+    private final ProfileDAO profileDAO;
-    private FeatureDAO featureDAO;
+    private final FeatureDAO featureDAO;
-    private ProfileManager profileManager;
+    private final ProfileManager profileManager;
-    private PolicyConfiguration policyConfiguration;
+    private final PolicyConfiguration policyConfiguration;
-    private static Log log = LogFactory.getLog(PolicyManagerImpl.class);
+    private static final Log log = LogFactory.getLog(PolicyManagerImpl.class);
 
     public PolicyManagerImpl() {
         this.policyDAO = PolicyManagementDAOFactory.getPolicyDAO();
@@ -495,10 +493,11 @@ public class PolicyManagerImpl implements PolicyManager {
                                     Policy policy) throws PolicyManagementException {
 
         List<Device> deviceList = new ArrayList<>();
-        DeviceManagementProviderService service = new DeviceManagementProviderServiceImpl();
+        DeviceManagementProviderService deviceManagementService = PolicyManagementDataHolder
+                .getInstance().getDeviceManagementService();
         for (DeviceIdentifier deviceIdentifier : deviceIdentifierList) {
             try {
-                Device device = service.getDevice(deviceIdentifier, false);
+                Device device = deviceManagementService.getDevice(deviceIdentifier, false);
                 deviceList.add(device);
             } catch (DeviceManagementException e) {
                 throw new PolicyManagementException("Error occurred while retrieving device information", e);
@@ -732,19 +731,23 @@ public class PolicyManagerImpl implements PolicyManager {
 
         List<Integer> policyIdList;
         List<Policy> policies = new ArrayList<>();
+
+        DeviceManagementProviderService deviceManagementService = PolicyManagementDataHolder
+                .getInstance().getDeviceManagementService();
+        Device device;
         try {
+            device = deviceManagementService.getDevice(deviceIdentifier, false);
+        } catch (DeviceManagementException e) {
+            throw new PolicyManagementException("Error occurred while getting device related to device identifier (" +
+                    deviceIdentifier.getId() + " - " + deviceIdentifier.getType() + ")", e);
+        }
 
-            DeviceManagementProviderService service = new DeviceManagementProviderServiceImpl();
+        try {
-            Device device = service.getDevice(deviceIdentifier, false);
-
             PolicyManagementDAOFactory.openConnection();
             policyIdList = policyDAO.getPolicyIdsOfDevice(device);
         } catch (PolicyManagerDAOException e) {
             throw new PolicyManagementException("Error occurred while getting the policies for device identifier (" +
                     deviceIdentifier.getId() + " - " + deviceIdentifier.getType() + ")", e);
-        } catch (DeviceManagementException e) {
-            throw new PolicyManagementException("Error occurred while getting device related to device identifier (" +
-                    deviceIdentifier.getId() + " - " + deviceIdentifier.getType() + ")", e);
         } catch (SQLException e) {
             throw new PolicyManagementException("Error occurred while open a data source connection", e);
         } finally {
@@ -814,7 +817,6 @@ public class PolicyManagerImpl implements PolicyManager {
         try {
             PolicyManagementDAOFactory.openConnection();
             policyIdList = policyDAO.getPolicyOfRole(roleName);
-
         } catch (PolicyManagerDAOException e) {
             throw new PolicyManagementException("Error occurred while getting the policies.", e);
         } catch (SQLException e) {
@@ -882,9 +884,16 @@ public class PolicyManagerImpl implements PolicyManager {
 
         List<Device> deviceList = new ArrayList<>();
         List<Integer> deviceIds;
+        DeviceManagementProviderService deviceManagementService = PolicyManagementDataHolder
+                .getInstance().getDeviceManagementService();
+        List<Device> allDevices;
+        try {
+            allDevices = deviceManagementService.getAllDevices();
+        } catch (DeviceManagementException e) {
+            throw new PolicyManagementException("Error occurred while getting the devices related to policy id (" +
+                    policyId + ")", e);
+        }
         try {
-            DeviceManagementProviderService service = PolicyManagementDataHolder.getInstance().getDeviceManagementService();
-            List<Device> allDevices = service.getAllDevices();
             PolicyManagementDAOFactory.openConnection();
             deviceIds = policyDAO.getPolicyAppliedDevicesIds(policyId);
             HashMap<Integer, Device> allDeviceMap = new HashMap<>();
@@ -906,9 +915,6 @@ public class PolicyManagerImpl implements PolicyManager {
                     policyId + ")", e);
         } catch (SQLException e) {
             throw new PolicyManagementException("Error occurred while opening a connection to the data source", e);
-        } catch (DeviceManagementException e) {
-            throw new PolicyManagementException("Error occurred while getting the devices related to policy id (" +
-                    policyId + ")", e);
         } finally {
             PolicyManagementDAOFactory.closeConnection();
         }
@@ -918,12 +924,17 @@ public class PolicyManagerImpl implements PolicyManager {
     @Override
     public void addAppliedPolicyFeaturesToDevice(DeviceIdentifier deviceIdentifier,
                                                  Policy policy) throws PolicyManagementException {
-        int deviceId = -1;
+        DeviceManagementProviderService deviceManagementService = PolicyManagementDataHolder
+                .getInstance().getDeviceManagementService();
+        Device device;
+        try {
+            device = deviceManagementService.getDevice(deviceIdentifier, false);
+        } catch (DeviceManagementException e) {
+            throw new PolicyManagementException("Error occurred while getting the device details (" +
+                    deviceIdentifier.getId() + ")", e);
+        }
+        int deviceId = device.getId();
         try {
-            DeviceManagementProviderService service = new DeviceManagementProviderServiceImpl();
-            Device device = service.getDevice(deviceIdentifier, false);
-            deviceId = device.getId();
-
             PolicyManagementDAOFactory.beginTransaction();
             boolean exist = policyDAO.checkPolicyAvailable(deviceId, device.getEnrolmentInfo().getId());
             if (exist) {
@@ -936,9 +947,6 @@ public class PolicyManagerImpl implements PolicyManager {
             PolicyManagementDAOFactory.rollbackTransaction();
             throw new PolicyManagementException("Error occurred while adding the evaluated policy to device (" +
                     deviceId + " - " + policy.getId() + ")", e);
-        } catch (DeviceManagementException e) {
-            throw new PolicyManagementException("Error occurred while getting the device details (" +
-                    deviceIdentifier.getId() + ")", e);
         } finally {
             PolicyManagementDAOFactory.closeConnection();
         }
@@ -997,12 +1005,18 @@ public class PolicyManagerImpl implements PolicyManager {
     @Override
     public void addAppliedPolicyToDevice(DeviceIdentifier deviceIdentifier, Policy policy)
             throws PolicyManagementException {
-
+        DeviceManagementProviderService deviceManagementService = PolicyManagementDataHolder
-        int deviceId = -1;
+                .getInstance().getDeviceManagementService();
+        Device device;
+        try {
+            device = deviceManagementService.getDevice(deviceIdentifier, false);
+        } catch (DeviceManagementException e) {
+            PolicyManagementDAOFactory.rollbackTransaction();
+            throw new PolicyManagementException("Error occurred while getting the device details (" +
+                    deviceIdentifier.getId() + ")", e);
+        }
+        int deviceId = device.getId();
         try {
-            DeviceManagementProviderService service = new DeviceManagementProviderServiceImpl();
-            Device device = service.getDevice(deviceIdentifier, false);
-            deviceId = device.getId();
             PolicyManagementDAOFactory.beginTransaction();
 
             Policy policySaved = policyDAO.getAppliedPolicy(deviceId, device.getEnrolmentInfo().getId());
@@ -1016,10 +1030,6 @@ public class PolicyManagerImpl implements PolicyManager {
             PolicyManagementDAOFactory.rollbackTransaction();
             throw new PolicyManagementException("Error occurred while adding the evaluated policy to device (" +
                     deviceId + " - " + policy.getId() + ")", e);
-        } catch (DeviceManagementException e) {
-            PolicyManagementDAOFactory.rollbackTransaction();
-            throw new PolicyManagementException("Error occurred while getting the device details (" +
-                    deviceIdentifier.getId() + ")", e);
         } finally {
             PolicyManagementDAOFactory.closeConnection();
         }
@@ -1027,12 +1037,18 @@ public class PolicyManagerImpl implements PolicyManager {
 
     @Override
     public void removeAppliedPolicyToDevice(DeviceIdentifier deviceIdentifier) throws PolicyManagementException {
-
+        DeviceManagementProviderService deviceManagementService = PolicyManagementDataHolder
-        int deviceId = -1;
+                .getInstance().getDeviceManagementService();
+        Device device;
+        try {
+            device = deviceManagementService.getDevice(deviceIdentifier, false);
+        } catch (DeviceManagementException e) {
+            PolicyManagementDAOFactory.rollbackTransaction();
+            throw new PolicyManagementException("Error occurred while getting the device details (" +
+                    deviceIdentifier.getId() + ")", e);
+        }
+        int deviceId = device.getId();
         try {
-            DeviceManagementProviderService service = new DeviceManagementProviderServiceImpl();
-            Device device = service.getDevice(deviceIdentifier, false);
-            deviceId = device.getId();
             PolicyManagementDAOFactory.beginTransaction();
 
             Policy policySaved = policyDAO.getAppliedPolicy(deviceId, device.getEnrolmentInfo().getId());
@@ -1044,10 +1060,6 @@ public class PolicyManagerImpl implements PolicyManager {
             PolicyManagementDAOFactory.rollbackTransaction();
             throw new PolicyManagementException("Error occurred while removing the applied policy to device (" +
                     deviceId + ")", e);
-        } catch (DeviceManagementException e) {
-            PolicyManagementDAOFactory.rollbackTransaction();
-            throw new PolicyManagementException("Error occurred while getting the device details (" +
-                    deviceIdentifier.getId() + ")", e);
         } finally {
             PolicyManagementDAOFactory.closeConnection();
         }
@@ -1057,17 +1069,21 @@ public class PolicyManagerImpl implements PolicyManager {
     public boolean checkPolicyAvailable(DeviceIdentifier deviceIdentifier) throws PolicyManagementException {
 
         boolean exist;
+        DeviceManagementProviderService deviceManagementService = PolicyManagementDataHolder
+                .getInstance().getDeviceManagementService();
+        Device device;
+        try {
+            device = deviceManagementService.getDevice(deviceIdentifier, false);
+        } catch (DeviceManagementException e) {
+            throw new PolicyManagementException("Error occurred while getting the device details (" +
+                    deviceIdentifier.getId() + ")", e);
+        }
         try {
-            DeviceManagementProviderService service = new DeviceManagementProviderServiceImpl();
-            Device device = service.getDevice(deviceIdentifier, false);
             PolicyManagementDAOFactory.openConnection();
             exist = policyDAO.checkPolicyAvailable(device.getId(), device.getEnrolmentInfo().getId());
         } catch (PolicyManagerDAOException e) {
             throw new PolicyManagementException("Error occurred while checking whether device has a policy " +
                     "to apply.", e);
-        } catch (DeviceManagementException e) {
-            throw new PolicyManagementException("Error occurred while getting the device details (" +
-                    deviceIdentifier.getId() + ")", e);
         } catch (SQLException e) {
             throw new PolicyManagementException("Error occurred while opening a connection to the data source", e);
         } finally {
@@ -1078,19 +1094,24 @@ public class PolicyManagerImpl implements PolicyManager {
 
     @Override
     public boolean setPolicyApplied(DeviceIdentifier deviceIdentifier) throws PolicyManagementException {
-        try {
-            DeviceManagementProviderService service = new DeviceManagementProviderServiceImpl();
-            Device device = service.getDevice(deviceIdentifier, false);
 
+        DeviceManagementProviderService deviceManagementService = PolicyManagementDataHolder
+                .getInstance().getDeviceManagementService();
+        Device device;
+        try {
+            device = deviceManagementService.getDevice(deviceIdentifier, false);
+        } catch (DeviceManagementException e) {
+            throw new PolicyManagementException("Error occurred while getting the device details (" +
+                    deviceIdentifier.getId() + ")", e);
+        }
+
+        try {
             PolicyManagementDAOFactory.openConnection();
             policyDAO.setPolicyApplied(device.getId(), device.getEnrolmentInfo().getId());
             return true;
         } catch (PolicyManagerDAOException e) {
             throw new PolicyManagementException("Error occurred while setting the policy has applied to device (" +
                     deviceIdentifier.getId() + ")", e);
-        } catch (DeviceManagementException e) {
-            throw new PolicyManagementException("Error occurred while getting the device details (" +
-                    deviceIdentifier.getId() + ")", e);
         } catch (SQLException e) {
             throw new PolicyManagementException("Error occurred while opening a connection to the data source", e);
         } finally {
@@ -1115,10 +1136,11 @@ public class PolicyManagerImpl implements PolicyManager {
     @Override
     @Deprecated
     public Policy getAppliedPolicyToDevice(DeviceIdentifier deviceId) throws PolicyManagementException {
-        DeviceManagementProviderService service = new DeviceManagementProviderServiceImpl();
+        DeviceManagementProviderService deviceManagementService = PolicyManagementDataHolder
+                .getInstance().getDeviceManagementService();
         Device device;
         try {
-            device = service.getDevice(deviceId, false);
+            device = deviceManagementService.getDevice(deviceId, false);
             if (device == null) {
                 if (log.isDebugEnabled()) {
                     log.debug("No device is found upon the device identifier '" + deviceId.getId() +
@@ -1163,17 +1185,18 @@ public class PolicyManagerImpl implements PolicyManager {
         }
     }
 
-    private List<DeviceGroupWrapper> getDeviceGroupNames(List<DeviceGroupWrapper> groupWrappers) throws GroupManagementException {
+    private List<DeviceGroupWrapper> getDeviceGroupNames(List<DeviceGroupWrapper> groupWrappers)
-        GroupManagementProviderService groupManagementProviderService = new GroupManagementProviderServiceImpl();
+            throws GroupManagementException {
+        GroupManagementProviderService groupManagementService = PolicyManagementDataHolder
+                .getInstance().getGroupManagementService();
         for (DeviceGroupWrapper wrapper : groupWrappers) {
-            DeviceGroup deviceGroup = groupManagementProviderService.getGroup(wrapper.getId(), false);
+            DeviceGroup deviceGroup = groupManagementService.getGroup(wrapper.getId(), false);
             wrapper.setName(deviceGroup.getName());
             wrapper.setOwner(deviceGroup.getOwner());
         }
         return groupWrappers;
     }
 
-
     private List<DeviceIdentifier> convertDevices(List<Device> devices) {
         List<DeviceIdentifier> deviceIdentifiers = new ArrayList<>();
         for (Device device : devices) {
@@ -1185,7 +1208,6 @@ public class PolicyManagerImpl implements PolicyManager {
         return deviceIdentifiers;
     }
 
-
     private void addPolicyRevokeOperation(List<DeviceIdentifier> deviceIdentifiers) throws PolicyManagementException {
         try {
             String type = null;

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/main/java/org/wso2/carbon/policy/mgt/core/task/MonitoringTask.java

@@ -16,7 +16,6 @@
  * under the License.
  */
 
-
 package org.wso2.carbon.policy.mgt.core.task;
 
 import org.apache.commons.logging.Log;
@@ -29,11 +28,9 @@ import org.wso2.carbon.device.mgt.common.exceptions.DeviceManagementException;
 import org.wso2.carbon.device.mgt.common.policy.mgt.PolicyMonitoringManager;
 import org.wso2.carbon.device.mgt.common.policy.mgt.monitor.PolicyComplianceException;
 import org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderService;
-import org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderServiceImpl;
 import org.wso2.carbon.ntask.core.Task;
 import org.wso2.carbon.policy.mgt.core.internal.PolicyManagementDataHolder;
 import org.wso2.carbon.policy.mgt.core.mgt.MonitoringManager;
-import org.wso2.carbon.user.api.UserStoreException;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -43,11 +40,8 @@ public class MonitoringTask implements Task {
 
     private static final Log log = LogFactory.getLog(MonitoringTask.class);
 
-    Map<String, String> properties;
-
     @Override
     public void setProperties(Map<String, String> map) {
-        this.properties = map;
     }
 
     @Override
@@ -84,7 +78,8 @@ public class MonitoringTask implements Task {
             log.debug("Monitoring task started to run for all tenants.");
         }
         try {
-            DeviceManagementProviderService deviceManagementService = new DeviceManagementProviderServiceImpl();
+            DeviceManagementProviderService deviceManagementService = PolicyManagementDataHolder
+                    .getInstance().getDeviceManagementService();
             List<Integer> tenants = deviceManagementService.getDeviceEnrolledTenants();
             for (Integer tenant : tenants) {
                 if (MultitenantConstants.SUPER_TENANT_ID == tenant) {

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/test/java/org/wso2/carbon/policy/mgt/core/BasePolicyManagementDAOTest.java

@@ -39,6 +39,7 @@ import org.wso2.carbon.device.mgt.core.authorization.DeviceAccessAuthorizationSe
 import org.wso2.carbon.device.mgt.core.config.DeviceConfigurationManager;
 import org.wso2.carbon.device.mgt.core.dao.DeviceManagementDAOFactory;
 import org.wso2.carbon.device.mgt.core.dao.GroupManagementDAOFactory;
+import org.wso2.carbon.device.mgt.core.device.details.mgt.impl.DeviceInformationManagerImpl;
 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.operation.mgt.dao.OperationManagementDAOFactory;
@@ -112,11 +113,17 @@ public abstract class BasePolicyManagementDAOTest {
         DeviceManagementDataHolder.getInstance().setDeviceAccessAuthorizationService(
                 new DeviceAccessAuthorizationServiceImpl());
         DeviceManagementDataHolder.getInstance().setGroupManagementProviderService(groupMgtService);
+        DeviceManagementDataHolder.getInstance().setDeviceInformationManager(new DeviceInformationManagerImpl());
         DeviceManagementDataHolder.getInstance().setDeviceTaskManagerService(null);
 
         PolicyEvaluationPoint policyEvaluationPoint = new SimplePolicyEvaluationTest();
         PolicyManagementDataHolder.getInstance().setPolicyEvaluationPoint("Simple", policyEvaluationPoint);
         PolicyManagementDataHolder.getInstance().setDeviceManagementService(deviceMgtService);
+        PolicyManagementDataHolder.getInstance().setPolicyManagerService(new PolicyManagerServiceImpl());
+
+        Field groupManagementService = PolicyManagementDataHolder.class.getDeclaredField("groupManagementService");
+        groupManagementService.setAccessible(true);
+        groupManagementService.set(PolicyManagementDataHolder.getInstance(), groupMgtService);
 
         profileManager = new ProfileManagerImpl();
     }

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/test/java/org/wso2/carbon/policy/mgt/core/MonitoringTestCase.java

@@ -22,16 +22,19 @@ package org.wso2.carbon.policy.mgt.core;
 import junit.framework.Assert;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
 import org.wso2.carbon.device.mgt.common.Device;
 import org.wso2.carbon.device.mgt.common.DeviceIdentifier;
 import org.wso2.carbon.device.mgt.common.exceptions.DeviceManagementException;
 import org.wso2.carbon.device.mgt.common.operation.mgt.OperationManager;
+import org.wso2.carbon.device.mgt.core.device.details.mgt.impl.DeviceInformationManagerImpl;
 import org.wso2.carbon.device.mgt.core.internal.DeviceManagementDataHolder;
 import org.wso2.carbon.device.mgt.core.operation.mgt.OperationManagerImpl;
 import org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderService;
 import org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderServiceImpl;
 import org.wso2.carbon.device.mgt.common.policy.mgt.Policy;
+import org.wso2.carbon.device.mgt.core.service.GroupManagementProviderServiceImpl;
 import org.wso2.carbon.policy.mgt.common.PolicyManagementException;
 import org.wso2.carbon.device.mgt.common.policy.mgt.monitor.PolicyComplianceException;
 import org.wso2.carbon.policy.mgt.core.internal.PolicyManagementDataHolder;
@@ -55,7 +58,11 @@ public class MonitoringTestCase extends BasePolicyManagementDAOTest {
     public void testMonitorDao() {
 
         DeviceManagementProviderService service = new DeviceManagementProviderServiceImpl();
+        DeviceManagementDataHolder.getInstance().setDeviceManagementProvider(service);
+        DeviceManagementDataHolder.getInstance().setDeviceInformationManager(new DeviceInformationManagerImpl());
+        DeviceManagementDataHolder.getInstance().setGroupManagementProviderService(new GroupManagementProviderServiceImpl());
         PolicyManagerService policyManagerService = new PolicyManagerServiceImpl();
+        PolicyManagementDataHolder.getInstance().setPolicyManagerService(policyManagerService);
 
         List<Policy> policies = null;
         List<Device> devices = null;

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/test/java/org/wso2/carbon/policy/mgt/core/PolicyDAOTestCase.java

@@ -55,6 +55,8 @@ public class PolicyDAOTestCase extends BasePolicyManagementDAOTest {
 
     @BeforeClass
     public void init() throws Exception {
+        log.info("Initializing policy tests");
+        super.initializeServices();
         initDatSource();
         // System.setProperty("GetTenantIDForTest", "Super");
         initiatePrivilegedCaronContext();

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/test/java/org/wso2/carbon/policy/mgt/core/PolicyEvaluationTestCase.java

@@ -46,6 +46,8 @@ public class PolicyEvaluationTestCase extends BasePolicyManagementDAOTest {
 
     @BeforeClass
     public void init() throws Exception {
+        log.info("Initializing policy tests");
+        super.initializeServices();
         PolicyEvaluationPoint evaluationPoint = new SimplePolicyEvaluationTest();
         PolicyManagementDataHolder.getInstance().setPolicyEvaluationPoint(evaluationPoint.getName(), evaluationPoint);
     }

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/test/java/org/wso2/carbon/policy/mgt/core/PolicyManagerServiceImplTest.java

@@ -89,6 +89,7 @@ public class  PolicyManagerServiceImplTest extends BasePolicyManagementDAOTest {
     public void addPolicy() throws DeviceManagementException, GroupManagementException, PolicyManagementException {
         int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId();
         policyManagerService = new PolicyManagerServiceImpl();
+        PolicyManagementDataHolder.getInstance().setPolicyManagerService(policyManagerService);
         DeviceManagementService deviceManagementService = new TypeXDeviceManagementService(DEVICE_TYPE_A);
         deviceMgtService.registerDeviceType(deviceManagementService);
         operationManager = new OperationManagerImpl(DEVICE_TYPE_A, deviceManagementService);