Fixing issue wso2/product-iot##527

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

@@ -22,6 +22,7 @@ import org.apache.commons.lang.StringUtils;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.eclipse.wst.common.uriresolver.internal.util.URIEncoder;
+import org.wso2.carbon.context.CarbonContext;
 import org.wso2.carbon.device.mgt.common.DeviceManagementException;
 import org.wso2.carbon.device.mgt.core.DeviceManagementConstants;
 import org.wso2.carbon.device.mgt.core.service.DeviceManagementProviderService;
@@ -41,6 +42,7 @@ import org.wso2.carbon.device.mgt.jaxrs.util.DeviceMgtAPIUtils;
 import org.wso2.carbon.identity.user.store.count.UserStoreCountRetriever;
 import org.wso2.carbon.identity.user.store.count.exception.UserStoreCounterException;
 import org.wso2.carbon.user.api.Permission;
+import org.wso2.carbon.user.api.RealmConfiguration;
 import org.wso2.carbon.user.api.UserStoreException;
 import org.wso2.carbon.user.api.UserStoreManager;
 import org.wso2.carbon.utils.CarbonUtils;
@@ -412,6 +414,15 @@ public class UserManagementServiceImpl implements UserManagementService {
     public Response getUserCount() {
         try {
             UserStoreCountRetriever userStoreCountRetrieverService = DeviceMgtAPIUtils.getUserStoreCountRetrieverService();
+            RealmConfiguration secondaryRealmConfiguration = CarbonContext.getThreadLocalCarbonContext().getUserRealm().
+                    getRealmConfiguration().getSecondaryRealmConfig();
+            
+            if (secondaryRealmConfiguration != null) {
+                if (!secondaryRealmConfiguration.isPrimary() && !Constants.JDBC_USERSTOREMANAGER.
+                        equals(secondaryRealmConfiguration.getUserStoreClass().getClass())) {
+                    return getUserCountViaUserStoreManager();
+                }
+            }
             if (userStoreCountRetrieverService != null) {
                 long count = userStoreCountRetrieverService.countUsers("");
                 if (count != -1) {
@@ -424,6 +435,10 @@ public class UserManagementServiceImpl implements UserManagementService {
             String msg =
                     "Error occurred while retrieving the count of users that exist within the current tenant";
             log.error(msg, e);
+        } catch (UserStoreException e) {
+            String msg =
+                    "Error occurred while retrieving user stores.";
+            log.error(msg, e);
         }
         return getUserCountViaUserStoreManager();
     }

components/device-mgt/org.wso2.carbon.device.mgt.api/src/main/java/org/wso2/carbon/device/mgt/jaxrs/util/Constants.java

@@ -28,6 +28,7 @@ public class Constants {
 	public static final String USER_CLAIM_LAST_NAME = "http://wso2.org/claims/lastname";
 	public static final String PRIMARY_USER_STORE = "PRIMARY";
 	public static final String SCOPE = "scope";
+	public static final String JDBC_USERSTOREMANAGER = "org.wso2.carbon.user.core.jdbc.JDBCUserStoreManager";
 
 	public final class ErrorMessages {
 		private ErrorMessages () { throw new AssertionError(); }