Save attributes strategies: preserve backwards compatibility when deprecating 'notifyDevice'

application/src/main/java/org/thingsboard/server/service/queue/DefaultTbCoreConsumerService.java

@@ -542,10 +542,19 @@ public class DefaultTbCoreConsumerService extends AbstractConsumerService<ToCore
                     proto.getScope(), KvProtoUtil.toAttributeKvList(proto.getDataList()), callback);
         } else if (msg.hasAttrDelete()) {
             TbAttributeDeleteProto proto = msg.getAttrDelete();
-            subscriptionManagerService.onAttributesDelete(
+            if (proto.hasNotifyDevice()) {
-                    toTenantId(proto.getTenantIdMSB(), proto.getTenantIdLSB()),
+                // handles old messages with deprecated 'notifyDevice'
-                    TbSubscriptionUtils.toEntityId(proto.getEntityType(), proto.getEntityIdMSB(), proto.getEntityIdLSB()),
+                subscriptionManagerService.onAttributesDelete(
-                    proto.getScope(), proto.getKeysList(), callback);
+                        toTenantId(proto.getTenantIdMSB(), proto.getTenantIdLSB()),
+                        TbSubscriptionUtils.toEntityId(proto.getEntityType(), proto.getEntityIdMSB(), proto.getEntityIdLSB()),
+                        proto.getScope(), proto.getKeysList(), proto.getNotifyDevice(), callback);
+            } else {
+                // handles new messages without 'notifyDevice'
+                subscriptionManagerService.onAttributesDelete(
+                        toTenantId(proto.getTenantIdMSB(), proto.getTenantIdLSB()),
+                        TbSubscriptionUtils.toEntityId(proto.getEntityType(), proto.getEntityIdMSB(), proto.getEntityIdLSB()),
+                        proto.getScope(), proto.getKeysList(), callback);
+            }
         } else if (msg.hasTsDelete()) {
             TbTimeSeriesDeleteProto proto = msg.getTsDelete();
             subscriptionManagerService.onTimeSeriesDelete(

application/src/main/java/org/thingsboard/server/service/subscription/DefaultSubscriptionManagerService.java

@@ -20,6 +20,7 @@ import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.context.event.EventListener;
 import org.springframework.stereotype.Service;
+import org.thingsboard.server.cluster.TbClusterService;
 import org.thingsboard.server.common.data.EntityType;
 import org.thingsboard.server.common.data.alarm.AlarmInfo;
 import org.thingsboard.server.common.data.id.DeviceId;
@@ -35,6 +36,7 @@ import org.thingsboard.server.common.data.kv.TsKvEntry;
 import org.thingsboard.server.common.msg.queue.ServiceType;
 import org.thingsboard.server.common.msg.queue.TbCallback;
 import org.thingsboard.server.common.msg.queue.TopicPartitionInfo;
+import org.thingsboard.server.common.msg.rule.engine.DeviceAttributesEventNotificationMsg;
 import org.thingsboard.server.gen.transport.TransportProtos.ToCoreNotificationMsg;
 import org.thingsboard.server.queue.TbQueueProducer;
 import org.thingsboard.server.queue.common.TbProtoQueueMsg;
@@ -74,6 +76,7 @@ public class DefaultSubscriptionManagerService extends TbApplicationEventListene
     private final TbQueueProducerProvider producerProvider;
     private final TbLocalSubscriptionService localSubscriptionService;
     private final DeviceStateService deviceStateService;
+    private final TbClusterService clusterService;
     private final SubscriptionSchedulerComponent scheduler;
 
     private final Lock subsLock = new ReentrantLock();
@@ -215,12 +218,20 @@ public class DefaultSubscriptionManagerService extends TbApplicationEventListene
 
     @Override
     public void onAttributesDelete(TenantId tenantId, EntityId entityId, String scope, List<String> keys, TbCallback callback) {
+        onAttributesDelete(tenantId, entityId, scope, keys, false, callback);
+    }
+
+    @Override
+    public void onAttributesDelete(TenantId tenantId, EntityId entityId, String scope, List<String> keys, boolean notifyDevice, TbCallback callback) {
         processAttributesUpdate(entityId, scope,
                 keys.stream().map(key -> new BaseAttributeKvEntry(0, new StringDataEntry(key, ""))).collect(Collectors.toList()));
         if (entityId.getEntityType() == EntityType.DEVICE) {
             if (TbAttributeSubscriptionScope.SERVER_SCOPE.name().equalsIgnoreCase(scope)
                     || TbAttributeSubscriptionScope.ANY_SCOPE.name().equalsIgnoreCase(scope)) {
                 deleteDeviceInactivityTimeout(tenantId, entityId, keys);
+            } else if (TbAttributeSubscriptionScope.SHARED_SCOPE.name().equalsIgnoreCase(scope) && notifyDevice) {
+                clusterService.pushMsgToCore(DeviceAttributesEventNotificationMsg.onDelete(tenantId,
+                        new DeviceId(entityId.getId()), scope, keys), null);
             }
         }
         callback.onSuccess();

application/src/main/java/org/thingsboard/server/service/subscription/SubscriptionManagerService.java

@@ -41,6 +41,15 @@ public interface SubscriptionManagerService extends ApplicationListener<Partitio
 
     void onAttributesDelete(TenantId tenantId, EntityId entityId, String scope, List<String> keys, TbCallback empty);
 
+    /**
+     * This method is retained solely for backwards compatibility, specifically to handle
+     * legacy proto messages that include the notifyDevice field.
+     *
+     * @deprecated as of 4.0, this method will be removed in future releases.
+     */
+    @Deprecated(forRemoval = true, since = "4.0")
+    void onAttributesDelete(TenantId tenantId, EntityId entityId, String scope, List<String> keys, boolean notifyDevice, TbCallback empty);
+
     void onTimeSeriesDelete(TenantId tenantId, EntityId entityId, List<String> keys, TbCallback callback);
 
     void onAlarmUpdate(TenantId tenantId, EntityId entityId, AlarmInfo alarm, TbCallback callback);

common/proto/src/main/proto/queue.proto

@@ -1079,8 +1079,11 @@ message TbAttributeDeleteProto {
   int64 tenantIdLSB = 5;
   string scope = 6;
   repeated string keys = 7;
-  // Deprecated since 4.0, not used anymore since device notification are now handled in DefaultTelemetrySubscriptionService instead of DefaultSubscriptionManagerService
+  // DEPRECATED. FOR REMOVAL
-  bool notifyDevice = 8 [deprecated = true];
+  // Since 4.0, this field is no longer used.
+  // Device notifications are now handled directly by DefaultTelemetrySubscriptionService,
+  // eliminating the need to pass this parameter through the queue and proto to DefaultSubscriptionManagerService.
+  optional bool notifyDevice = 8 [deprecated = true];
 }
 
 message TbTimeSeriesDeleteProto {