Fix FCM and configuration fetching issues

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

@@ -64,7 +64,7 @@ public class FCMNotificationStrategy implements NotificationStrategy {
             if (NOTIFIER_TYPE_FCM.equals(config.getType())) {
                 Device device = FCMDataHolder.getInstance().getDeviceManagementProviderService()
                         .getDeviceWithTypeProperties(ctx.getDeviceId());
-                if(getFCMToken(device.getProperties()) != null) {
+                if(device.getProperties() != null && getFCMToken(device.getProperties()) != null) {
                     this.sendWakeUpCall(ctx.getOperation().getCode(), device);
                 }
             } else {
@@ -92,6 +92,7 @@ public class FCMNotificationStrategy implements NotificationStrategy {
 
     private void sendWakeUpCall(String message, Device device) throws IOException,
                                                                       PushNotificationExecutionFailedException {
+        if (device.getProperties() != null) {
             OutputStream os = null;
             byte[] bytes = getFCMRequest(message, getFCMToken(device.getProperties())).getBytes();
 
@@ -121,6 +122,7 @@ public class FCMNotificationStrategy implements NotificationStrategy {
                         "error code '" + status + "'");
             }
         }
+    }
 
     private static String getFCMRequest(String message, String registrationId) {
         JsonObject fcmRequest = new JsonObject();

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

@@ -23,6 +23,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 public class ProfileOperation extends ConfigOperation implements Serializable {
+    private static final long serialVersionUID = -3322674908775087365L;
     private List<Integer> correctiveActionIds;
 
     private List<Integer> reactiveActionIds;

components/device-mgt/org.wso2.carbon.device.mgt.extensions/src/main/java/org/wso2/carbon/device/mgt/extensions/device/type/template/DeviceTypeManagerService.java

@@ -36,6 +36,7 @@ package org.wso2.carbon.device.mgt.extensions.device.type.template;
 
 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.exceptions.DeviceManagementException;
 import org.wso2.carbon.device.mgt.common.DeviceManager;
 import org.wso2.carbon.device.mgt.common.DeviceStatusTaskPluginConfig;
@@ -336,7 +337,19 @@ public class DeviceTypeManagerService implements DeviceManagementService {
     private Map<String, String> getConfigProperty(List<ConfigurationEntry> configs) {
         Map<String, String> propertMap = new HashMap<>();
         for (ConfigurationEntry entry : configs) {
+            if (entry != null && entry.getValue() != null && entry.getName() != null) {
                 propertMap.put(entry.getName(), entry.getValue().toString());
+            } else {
+                int tenantId = CarbonContext.getThreadLocalCarbonContext().getTenantId();
+                String domain = CarbonContext.getThreadLocalCarbonContext().getTenantDomain();
+                String message = "Could not find a property in tenant id: " + tenantId + ", " +
+                        "domain: " + domain;
+                if (entry != null && entry.getName() != null) {
+                    message += ", missing value for properly: " + entry.getName();
+                }
+
+                log.error(message);
+            }
         }
         return propertMap;
     }