thingsboard-memoizeit

Refactoring of Gateway API

10/11/2018 1:29:21 PM

Changes

common/data/src/main/java/org/thingsboard/server/common/data/id/SessionId.java 24(+0 -24)

Details

diff --git a/application/src/main/java/org/thingsboard/server/actors/device/DeviceActorMessageProcessor.java b/application/src/main/java/org/thingsboard/server/actors/device/DeviceActorMessageProcessor.java
index c590104..1cfdcd2 100644
--- a/application/src/main/java/org/thingsboard/server/actors/device/DeviceActorMessageProcessor.java
+++ b/application/src/main/java/org/thingsboard/server/actors/device/DeviceActorMessageProcessor.java
@@ -411,29 +411,6 @@ public class DeviceActorMessageProcessor extends AbstractContextAwareMsgProcesso
         }
     }
 
-//    private void processRpcResponses(ActorContext context, DeviceToDeviceActorMsg msg) {
-//        SessionId sessionId = msg.getSessionId();
-//        FromDeviceMsg inMsg = msg.getPayload();
-//        if (inMsg.getMsgType() == SessionMsgType.TO_DEVICE_RPC_RESPONSE) {
-//            logger.debug("[{}] Processing rpc command response [{}]", deviceId, sessionId);
-//            ToDeviceRpcResponseMsg responseMsg = (ToDeviceRpcResponseMsg) inMsg;
-//            ToDeviceRpcRequestMetadata requestMd = toDeviceRpcPendingMap.remove(responseMsg.getRequestId());
-//            boolean success = requestMd != null;
-//            if (success) {
-//                systemContext.getDeviceRpcService().processRpcResponseFromDevice(new FromDeviceRpcResponse(requestMd.getMsg().getMsg().getId(),
-//                        requestMd.getMsg().getServerAddress(), responseMsg.getData(), null));
-//            } else {
-//                logger.debug("[{}] Rpc command response [{}] is stale!", deviceId, responseMsg.getRequestId());
-//            }
-//            if (msg.getSessionType() == SessionType.SYNC) {
-//                BasicCommandAckResponse response = success
-//                        ? BasicCommandAckResponse.onSuccess(SessionMsgType.TO_DEVICE_RPC_REQUEST, responseMsg.getRequestId())
-//                        : BasicCommandAckResponse.onError(SessionMsgType.TO_DEVICE_RPC_REQUEST, responseMsg.getRequestId(), new TimeoutException());
-//                sendMsgToSessionActor(new BasicActorSystemToDeviceSessionActorMsg(response, msg.getSessionId()), msg.getServerAddress());
-//            }
-//        }
-//    }
-
     void processClusterEventMsg(ClusterEventMsg msg) {
 //        if (!msg.isAdded()) {
 //            logger.debug("[{}] Clearing attributes/rpc subscription for server [{}]", deviceId, msg.getServerAddress());
diff --git a/application/src/main/java/org/thingsboard/server/actors/shared/SessionTimeoutMsg.java b/application/src/main/java/org/thingsboard/server/actors/shared/SessionTimeoutMsg.java
index d015fe0..d89848b 100644
--- a/application/src/main/java/org/thingsboard/server/actors/shared/SessionTimeoutMsg.java
+++ b/application/src/main/java/org/thingsboard/server/actors/shared/SessionTimeoutMsg.java
@@ -16,7 +16,6 @@
 package org.thingsboard.server.actors.shared;
 
 import lombok.Data;
-import org.thingsboard.server.common.data.id.SessionId;
 import org.thingsboard.server.common.msg.MsgType;
 import org.thingsboard.server.common.msg.TbActorMsg;
 
diff --git a/application/src/main/java/org/thingsboard/server/service/transport/RemoteTransportApiService.java b/application/src/main/java/org/thingsboard/server/service/transport/RemoteTransportApiService.java
index 6e9b2ef..5bcd8ac 100644
--- a/application/src/main/java/org/thingsboard/server/service/transport/RemoteTransportApiService.java
+++ b/application/src/main/java/org/thingsboard/server/service/transport/RemoteTransportApiService.java
@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2018 The Thingsboard Authors
- *
+ * <p>
  * Licensed 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
- *
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
  * 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.
@@ -24,11 +24,16 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.stereotype.Service;
+import org.thingsboard.server.common.data.Device;
 import org.thingsboard.server.common.data.id.DeviceId;
+import org.thingsboard.server.common.data.relation.EntityRelation;
 import org.thingsboard.server.common.data.security.DeviceCredentials;
 import org.thingsboard.server.common.data.security.DeviceCredentialsType;
 import org.thingsboard.server.dao.device.DeviceCredentialsService;
 import org.thingsboard.server.dao.device.DeviceService;
+import org.thingsboard.server.dao.relation.RelationService;
+import org.thingsboard.server.gen.transport.TransportProtos.GetOrCreateDeviceFromGatewayRequestMsg;
+import org.thingsboard.server.gen.transport.TransportProtos.GetOrCreateDeviceFromGatewayResponseMsg;
 import org.thingsboard.server.gen.transport.TransportProtos.DeviceInfoProto;
 import org.thingsboard.server.gen.transport.TransportProtos.TransportApiRequestMsg;
 import org.thingsboard.server.gen.transport.TransportProtos.TransportApiResponseMsg;
@@ -40,8 +45,10 @@ import org.thingsboard.server.kafka.TBKafkaProducerTemplate;
 import org.thingsboard.server.kafka.TbKafkaResponseTemplate;
 import org.thingsboard.server.kafka.TbKafkaSettings;
 import org.thingsboard.server.service.cluster.discovery.DiscoveryService;
+import org.thingsboard.server.service.state.DeviceStateService;
 
 import javax.annotation.PostConstruct;
+import java.util.UUID;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
@@ -78,8 +85,14 @@ public class RemoteTransportApiService implements TransportApiService {
     private DeviceService deviceService;
 
     @Autowired
+    private RelationService relationService;
+
+    @Autowired
     private DeviceCredentialsService deviceCredentialsService;
 
+    @Autowired
+    private DeviceStateService deviceStateService;
+
     private ExecutorService transportCallbackExecutor;
 
     private TbKafkaResponseTemplate<TransportApiRequestMsg, TransportApiResponseMsg> transportApiTemplate;
@@ -123,6 +136,8 @@ public class RemoteTransportApiService implements TransportApiService {
         } else if (transportApiRequestMsg.hasValidateX509CertRequestMsg()) {
             ValidateDeviceX509CertRequestMsg msg = transportApiRequestMsg.getValidateX509CertRequestMsg();
             return validateCredentials(msg.getHash(), DeviceCredentialsType.X509_CERTIFICATE);
+        } else if (transportApiRequestMsg.hasGetOrCreateDeviceRequestMsg()) {
+            return handle(transportApiRequestMsg.getGetOrCreateDeviceRequestMsg());
         }
         return getEmptyTransportApiResponseFuture();
     }
@@ -137,6 +152,32 @@ public class RemoteTransportApiService implements TransportApiService {
         }
     }
 
+    private ListenableFuture<TransportApiResponseMsg> handle(GetOrCreateDeviceFromGatewayRequestMsg requestMsg) {
+        DeviceId gatewayId = new DeviceId(new UUID(requestMsg.getGatewayIdMSB(), requestMsg.getGatewayIdLSB()));
+        ListenableFuture<Device> gatewayFuture = deviceService.findDeviceByIdAsync(gatewayId);
+        return Futures.transform(gatewayFuture, gateway -> {
+            Device device = deviceService.findDeviceByTenantIdAndName(gateway.getTenantId(), gateway.getName());
+            if (device == null) {
+                device = new Device();
+                device.setTenantId(gateway.getTenantId());
+                device.setName(requestMsg.getDeviceName());
+                device.setType(requestMsg.getDeviceType());
+                device.setCustomerId(gateway.getCustomerId());
+                device = deviceService.saveDevice(device);
+                relationService.saveRelationAsync(new EntityRelation(gateway.getId(), device.getId(), "Created"));
+                deviceStateService.onDeviceAdded(device);
+            }
+            try {
+                return TransportApiResponseMsg.newBuilder()
+                        .setGetOrCreateDeviceResponseMsg(GetOrCreateDeviceFromGatewayResponseMsg.newBuilder().setDeviceInfo(getDeviceInfoProto(device)).build()).build();
+            } catch (JsonProcessingException e) {
+                log.warn("[{}] Failed to lookup device by gateway id and name", gatewayId, requestMsg.getDeviceName(), e);
+                throw new RuntimeException(e);
+            }
+        }, transportCallbackExecutor);
+    }
+
+
     private ListenableFuture<TransportApiResponseMsg> getDeviceInfo(DeviceId deviceId) {
         return Futures.transform(deviceService.findDeviceByIdAsync(deviceId), device -> {
             if (device == null) {
@@ -144,17 +185,8 @@ public class RemoteTransportApiService implements TransportApiService {
                 return getEmptyTransportApiResponse();
             }
             try {
-                DeviceInfoProto deviceInfoProto = DeviceInfoProto.newBuilder()
-                        .setTenantIdMSB(device.getTenantId().getId().getMostSignificantBits())
-                        .setTenantIdLSB(device.getTenantId().getId().getLeastSignificantBits())
-                        .setDeviceIdMSB(device.getId().getId().getMostSignificantBits())
-                        .setDeviceIdLSB(device.getId().getId().getLeastSignificantBits())
-                        .setDeviceName(device.getName())
-                        .setDeviceType(device.getType())
-                        .setAdditionalInfo(mapper.writeValueAsString(device.getAdditionalInfo()))
-                        .build();
                 return TransportApiResponseMsg.newBuilder()
-                        .setValidateTokenResponseMsg(ValidateDeviceCredentialsResponseMsg.newBuilder().setDeviceInfo(deviceInfoProto).build()).build();
+                        .setValidateTokenResponseMsg(ValidateDeviceCredentialsResponseMsg.newBuilder().setDeviceInfo(getDeviceInfoProto(device)).build()).build();
             } catch (JsonProcessingException e) {
                 log.warn("[{}] Failed to lookup device by id", deviceId, e);
                 return getEmptyTransportApiResponse();
@@ -162,6 +194,18 @@ public class RemoteTransportApiService implements TransportApiService {
         });
     }
 
+    private DeviceInfoProto getDeviceInfoProto(Device device) throws JsonProcessingException {
+        return DeviceInfoProto.newBuilder()
+                .setTenantIdMSB(device.getTenantId().getId().getMostSignificantBits())
+                .setTenantIdLSB(device.getTenantId().getId().getLeastSignificantBits())
+                .setDeviceIdMSB(device.getId().getId().getMostSignificantBits())
+                .setDeviceIdLSB(device.getId().getId().getLeastSignificantBits())
+                .setDeviceName(device.getName())
+                .setDeviceType(device.getType())
+                .setAdditionalInfo(mapper.writeValueAsString(device.getAdditionalInfo()))
+                .build();
+    }
+
     private ListenableFuture<TransportApiResponseMsg> getEmptyTransportApiResponseFuture() {
         return Futures.immediateFuture(getEmptyTransportApiResponse());
     }
diff --git a/common/message/src/main/java/org/thingsboard/server/common/msg/aware/SessionAwareMsg.java b/common/message/src/main/java/org/thingsboard/server/common/msg/aware/SessionAwareMsg.java
index db6ff6f..1c25823 100644
--- a/common/message/src/main/java/org/thingsboard/server/common/msg/aware/SessionAwareMsg.java
+++ b/common/message/src/main/java/org/thingsboard/server/common/msg/aware/SessionAwareMsg.java
@@ -15,8 +15,6 @@
  */
 package org.thingsboard.server.common.msg.aware;
 
-import org.thingsboard.server.common.data.id.SessionId;
-
 public interface SessionAwareMsg {
 
     SessionId getSessionId();
diff --git a/common/message/src/main/java/org/thingsboard/server/common/msg/core/SessionOpenMsg.java b/common/message/src/main/java/org/thingsboard/server/common/msg/core/SessionOpenMsg.java
index 28e319e..d8af5a9 100644
--- a/common/message/src/main/java/org/thingsboard/server/common/msg/core/SessionOpenMsg.java
+++ b/common/message/src/main/java/org/thingsboard/server/common/msg/core/SessionOpenMsg.java
@@ -16,11 +16,8 @@
 package org.thingsboard.server.common.msg.core;
 
 import lombok.Data;
-import org.thingsboard.server.common.data.id.SessionId;
-import org.thingsboard.server.common.msg.aware.SessionAwareMsg;
 import org.thingsboard.server.common.msg.session.FromDeviceMsg;
 import org.thingsboard.server.common.msg.session.SessionMsgType;
-import org.thingsboard.server.common.msg.session.SessionMsgType;
 
 /**
  * @author Andrew Shvayka
diff --git a/common/message/src/main/java/org/thingsboard/server/common/msg/session/BasicSessionMsg.java b/common/message/src/main/java/org/thingsboard/server/common/msg/session/BasicSessionMsg.java
index 855cce5..84c5052 100644
--- a/common/message/src/main/java/org/thingsboard/server/common/msg/session/BasicSessionMsg.java
+++ b/common/message/src/main/java/org/thingsboard/server/common/msg/session/BasicSessionMsg.java
@@ -15,8 +15,6 @@
  */
 package org.thingsboard.server.common.msg.session;
 
-import org.thingsboard.server.common.data.id.SessionId;
-
 public class BasicSessionMsg implements SessionMsg {
 
     private final SessionContext ctx;
diff --git a/common/message/src/main/java/org/thingsboard/server/common/msg/session/BasicTransportToDeviceSessionActorMsg.java b/common/message/src/main/java/org/thingsboard/server/common/msg/session/BasicTransportToDeviceSessionActorMsg.java
index 0704e6e..4a81fd4 100644
--- a/common/message/src/main/java/org/thingsboard/server/common/msg/session/BasicTransportToDeviceSessionActorMsg.java
+++ b/common/message/src/main/java/org/thingsboard/server/common/msg/session/BasicTransportToDeviceSessionActorMsg.java
@@ -18,7 +18,6 @@ package org.thingsboard.server.common.msg.session;
 import org.thingsboard.server.common.data.Device;
 import org.thingsboard.server.common.data.id.CustomerId;
 import org.thingsboard.server.common.data.id.DeviceId;
-import org.thingsboard.server.common.data.id.SessionId;
 import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.msg.MsgType;
 
diff --git a/common/message/src/main/java/org/thingsboard/server/common/msg/session/ctrl/SessionCloseMsg.java b/common/message/src/main/java/org/thingsboard/server/common/msg/session/ctrl/SessionCloseMsg.java
index 49fad13..22a13d0 100644
--- a/common/message/src/main/java/org/thingsboard/server/common/msg/session/ctrl/SessionCloseMsg.java
+++ b/common/message/src/main/java/org/thingsboard/server/common/msg/session/ctrl/SessionCloseMsg.java
@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.common.msg.session.ctrl;
 
-import org.thingsboard.server.common.data.id.SessionId;
 import org.thingsboard.server.common.msg.MsgType;
 import org.thingsboard.server.common.msg.session.SessionCtrlMsg;
 
diff --git a/common/message/src/main/java/org/thingsboard/server/common/msg/session/SessionContext.java b/common/message/src/main/java/org/thingsboard/server/common/msg/session/SessionContext.java
index 2f2d880..6607295 100644
--- a/common/message/src/main/java/org/thingsboard/server/common/msg/session/SessionContext.java
+++ b/common/message/src/main/java/org/thingsboard/server/common/msg/session/SessionContext.java
@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2018 The Thingsboard Authors
- *
+ * <p>
  * Licensed 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
- *
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
  * 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.
@@ -15,21 +15,11 @@
  */
 package org.thingsboard.server.common.msg.session;
 
-import org.thingsboard.server.common.data.id.SessionId;
-import org.thingsboard.server.common.msg.session.ex.SessionException;
+import java.util.UUID;
 
 public interface SessionContext {
 
-    SessionId getSessionId();
-
-    SessionType getSessionType();
-
-    void onMsg(SessionActorToAdaptorMsg msg) throws SessionException;
-
-    void onMsg(SessionCtrlMsg msg) throws SessionException;
-
-    boolean isClosed();
-
-    long getTimeout();
+    UUID getSessionId();
 
+    int nextMsgId();
 }
diff --git a/common/transport/src/main/java/org/thingsboard/server/common/transport/adaptor/JsonConverter.java b/common/transport/src/main/java/org/thingsboard/server/common/transport/adaptor/JsonConverter.java
index db7ee88..e02bb4b 100644
--- a/common/transport/src/main/java/org/thingsboard/server/common/transport/adaptor/JsonConverter.java
+++ b/common/transport/src/main/java/org/thingsboard/server/common/transport/adaptor/JsonConverter.java
@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2018 The Thingsboard Authors
- *
+ * <p>
  * Licensed 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
- *
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
  * 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.
@@ -52,7 +52,8 @@ import java.util.stream.Collectors;
 public class JsonConverter {
 
     private static final Gson GSON = new Gson();
-    public static final String CAN_T_PARSE_VALUE = "Can't parse value: ";
+    private static final String CAN_T_PARSE_VALUE = "Can't parse value: ";
+    private static final String DEVICE_PROPERTY = "device";
 
     public static TelemetryUploadRequest convertToTelemetry(JsonElement jsonObject) throws JsonSyntaxException {
         return convertToTelemetry(jsonObject, BasicRequest.DEFAULT_REQUEST_ID);
@@ -318,6 +319,57 @@ public class JsonConverter {
         return result;
     }
 
+    public static JsonObject getJsonObjectForGateway(TransportProtos.GetAttributeResponseMsg responseMsg) {
+        JsonObject result = new JsonObject();
+        result.addProperty("id", responseMsg.getRequestId());
+        if (responseMsg.getClientAttributeListCount() > 0) {
+            addValues(result, responseMsg.getClientAttributeListList());
+        }
+        if (responseMsg.getSharedAttributeListCount() > 0) {
+            addValues(result, responseMsg.getSharedAttributeListList());
+        }
+        return result;
+    }
+
+    public static JsonObject getJsonObjectForGateway(String deviceName, AttributeUpdateNotificationMsg notificationMsg) {
+        JsonObject result = new JsonObject();
+        result.addProperty(DEVICE_PROPERTY, deviceName);
+        result.add("data", toJson(notificationMsg));
+        return result;
+    }
+
+    private static void addValues(JsonObject result, List<TransportProtos.TsKvProto> kvList) {
+        if (kvList.size() == 1) {
+            addValueToJson(result, "value", kvList.get(0).getKv());
+        } else {
+            JsonObject values;
+            if (result.has("values")) {
+                values = result.get("values").getAsJsonObject();
+            } else {
+                values = new JsonObject();
+                result.add("values", values);
+            }
+            kvList.forEach(value -> addValueToJson(values, value.getKv().getKey(), value.getKv()));
+        }
+    }
+
+    private static void addValueToJson(JsonObject json, String name, TransportProtos.KeyValueProto entry) {
+        switch (entry.getType()) {
+            case BOOLEAN_V:
+                json.addProperty(name, entry.getBoolV());
+                break;
+            case STRING_V:
+                json.addProperty(name, entry.getStringV());
+                break;
+            case DOUBLE_V:
+                json.addProperty(name, entry.getDoubleV());
+                break;
+            case LONG_V:
+                json.addProperty(name, entry.getLongV());
+                break;
+        }
+    }
+
     private static Consumer<AttributeKey> addToObject(JsonArray result) {
         return key -> result.add(key.getAttributeKey());
     }
diff --git a/common/transport/src/main/java/org/thingsboard/server/common/transport/session/DeviceAwareSessionContext.java b/common/transport/src/main/java/org/thingsboard/server/common/transport/session/DeviceAwareSessionContext.java
index b46cfb8..93921d3 100644
--- a/common/transport/src/main/java/org/thingsboard/server/common/transport/session/DeviceAwareSessionContext.java
+++ b/common/transport/src/main/java/org/thingsboard/server/common/transport/session/DeviceAwareSessionContext.java
@@ -31,16 +31,9 @@ public abstract class DeviceAwareSessionContext implements SessionContext {
 
     @Getter
     private volatile DeviceId deviceId;
+    @Getter
     private volatile DeviceInfoProto deviceInfo;
 
-    public long getDeviceIdMSB() {
-        return deviceInfo.getDeviceIdMSB();
-    }
-
-    public long getDeviceIdLSB() {
-        return deviceInfo.getDeviceIdLSB();
-    }
-
     public DeviceId getDeviceId() {
         return deviceId;
     }
diff --git a/common/transport/src/main/java/org/thingsboard/server/common/transport/TransportAdaptor.java b/common/transport/src/main/java/org/thingsboard/server/common/transport/TransportAdaptor.java
index 86067d5..b59d493 100644
--- a/common/transport/src/main/java/org/thingsboard/server/common/transport/TransportAdaptor.java
+++ b/common/transport/src/main/java/org/thingsboard/server/common/transport/TransportAdaptor.java
@@ -15,19 +15,8 @@
  */
 package org.thingsboard.server.common.transport;
 
-import org.thingsboard.server.common.msg.session.AdaptorToSessionActorMsg;
-import org.thingsboard.server.common.msg.session.SessionMsgType;
-import org.thingsboard.server.common.msg.session.SessionActorToAdaptorMsg;
 import org.thingsboard.server.common.msg.session.SessionContext;
-import org.thingsboard.server.common.transport.adaptor.AdaptorException;
-import org.thingsboard.server.gen.transport.TransportProtos;
-
-import java.util.Optional;
 
 public interface TransportAdaptor<C extends SessionContext, T, V> {
 
-    AdaptorToSessionActorMsg convertToActorMsg(C ctx, SessionMsgType type, T inbound) throws AdaptorException;
-
-    Optional<V> convertToAdaptorMsg(C ctx, SessionActorToAdaptorMsg msg) throws AdaptorException;
-
 }
diff --git a/common/transport/src/main/java/org/thingsboard/server/common/transport/TransportService.java b/common/transport/src/main/java/org/thingsboard/server/common/transport/TransportService.java
index cd30419..c9a04c4 100644
--- a/common/transport/src/main/java/org/thingsboard/server/common/transport/TransportService.java
+++ b/common/transport/src/main/java/org/thingsboard/server/common/transport/TransportService.java
@@ -15,6 +15,7 @@
  */
 package org.thingsboard.server.common.transport;
 
+import org.thingsboard.server.gen.transport.TransportProtos;
 import org.thingsboard.server.gen.transport.TransportProtos.ToServerRpcRequestMsg;
 import org.thingsboard.server.gen.transport.TransportProtos.ToDeviceRpcResponseMsg;
 import org.thingsboard.server.gen.transport.TransportProtos.SubscribeToAttributeUpdatesMsg;
@@ -39,6 +40,9 @@ public interface TransportService {
     void process(ValidateDeviceX509CertRequestMsg msg,
                  TransportServiceCallback<ValidateDeviceCredentialsResponseMsg> callback);
 
+    void process(TransportProtos.GetOrCreateDeviceFromGatewayRequestMsg msg,
+                 TransportServiceCallback<TransportProtos.GetOrCreateDeviceFromGatewayResponseMsg> callback);
+
     void process(SessionInfoProto sessionInfo, SessionEventMsg msg, TransportServiceCallback<Void> callback);
 
     void process(SessionInfoProto sessionInfo, PostTelemetryMsg msg, TransportServiceCallback<Void> callback);
diff --git a/common/transport/src/main/proto/transport.proto b/common/transport/src/main/proto/transport.proto
index bcf5f52..3099c5c 100644
--- a/common/transport/src/main/proto/transport.proto
+++ b/common/transport/src/main/proto/transport.proto
@@ -125,6 +125,17 @@ message ValidateDeviceCredentialsResponseMsg {
   DeviceInfoProto deviceInfo = 1;
 }
 
+message GetOrCreateDeviceFromGatewayRequestMsg {
+  int64 gatewayIdMSB = 1;
+  int64 gatewayIdLSB = 2;
+  string deviceName = 3;
+  string deviceType = 4;
+}
+
+message GetOrCreateDeviceFromGatewayResponseMsg {
+  DeviceInfoProto deviceInfo = 1;
+}
+
 message SessionCloseNotificationProto {
   string message = 1;
 }
@@ -196,8 +207,10 @@ message ToTransportMsg {
 message TransportApiRequestMsg {
    ValidateDeviceTokenRequestMsg validateTokenRequestMsg = 1;
    ValidateDeviceX509CertRequestMsg validateX509CertRequestMsg = 2;
+   GetOrCreateDeviceFromGatewayRequestMsg getOrCreateDeviceRequestMsg = 3;
 }
 
 message TransportApiResponseMsg {
    ValidateDeviceCredentialsResponseMsg validateTokenResponseMsg = 1;
+   GetOrCreateDeviceFromGatewayResponseMsg getOrCreateDeviceResponseMsg = 2;
 }
\ No newline at end of file
diff --git a/transport/coap/src/main/java/org/thingsboard/server/transport/coap/CoapTransportResource.java b/transport/coap/src/main/java/org/thingsboard/server/transport/coap/CoapTransportResource.java
index 0853124..88fb69e 100644
--- a/transport/coap/src/main/java/org/thingsboard/server/transport/coap/CoapTransportResource.java
+++ b/transport/coap/src/main/java/org/thingsboard/server/transport/coap/CoapTransportResource.java
@@ -27,7 +27,6 @@ import org.eclipse.californium.core.network.Exchange;
 import org.eclipse.californium.core.network.ExchangeObserver;
 import org.eclipse.californium.core.server.resources.CoapExchange;
 import org.eclipse.californium.core.server.resources.Resource;
-import org.thingsboard.server.common.data.id.SessionId;
 import org.thingsboard.server.common.data.security.DeviceCredentialsFilter;
 import org.thingsboard.server.common.data.security.DeviceTokenCredentials;
 import org.thingsboard.server.common.msg.session.*;
diff --git a/transport/coap/src/main/java/org/thingsboard/server/transport/coap/session/CoapSessionCtx.java b/transport/coap/src/main/java/org/thingsboard/server/transport/coap/session/CoapSessionCtx.java
index c43a4de..efabc4e 100644
--- a/transport/coap/src/main/java/org/thingsboard/server/transport/coap/session/CoapSessionCtx.java
+++ b/transport/coap/src/main/java/org/thingsboard/server/transport/coap/session/CoapSessionCtx.java
@@ -20,20 +20,16 @@ import org.eclipse.californium.core.coap.CoAP.ResponseCode;
 import org.eclipse.californium.core.coap.Request;
 import org.eclipse.californium.core.coap.Response;
 import org.eclipse.californium.core.server.resources.CoapExchange;
-import org.thingsboard.server.common.data.id.SessionId;
 import org.thingsboard.server.common.msg.session.SessionActorToAdaptorMsg;
 import org.thingsboard.server.common.msg.session.SessionCtrlMsg;
 import org.thingsboard.server.common.msg.session.SessionType;
 import org.thingsboard.server.common.msg.session.ctrl.SessionCloseMsg;
-import org.thingsboard.server.common.msg.session.ex.SessionAuthException;
 import org.thingsboard.server.common.msg.session.ex.SessionException;
 import org.thingsboard.server.common.transport.SessionMsgProcessor;
 import org.thingsboard.server.common.transport.adaptor.AdaptorException;
 import org.thingsboard.server.common.transport.auth.DeviceAuthService;
 import org.thingsboard.server.common.transport.session.DeviceAwareSessionContext;
 import org.thingsboard.server.transport.coap.adaptors.CoapTransportAdaptor;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import java.util.concurrent.atomic.AtomicInteger;
 
diff --git a/transport/coap/src/main/java/org/thingsboard/server/transport/coap/session/CoapSessionId.java b/transport/coap/src/main/java/org/thingsboard/server/transport/coap/session/CoapSessionId.java
index 888fb2f..2bfcf1d 100644
--- a/transport/coap/src/main/java/org/thingsboard/server/transport/coap/session/CoapSessionId.java
+++ b/transport/coap/src/main/java/org/thingsboard/server/transport/coap/session/CoapSessionId.java
@@ -15,8 +15,6 @@
  */
 package org.thingsboard.server.transport.coap.session;
 
-import org.thingsboard.server.common.data.id.SessionId;
-
 public final class CoapSessionId implements SessionId {
 
     private final String clientAddress;
diff --git a/transport/http/src/main/java/org/thingsboard/server/transport/http/session/HttpSessionCtx.java b/transport/http/src/main/java/org/thingsboard/server/transport/http/session/HttpSessionCtx.java
index 5269285..62999cc 100644
--- a/transport/http/src/main/java/org/thingsboard/server/transport/http/session/HttpSessionCtx.java
+++ b/transport/http/src/main/java/org/thingsboard/server/transport/http/session/HttpSessionCtx.java
@@ -20,7 +20,6 @@ import lombok.extern.slf4j.Slf4j;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.context.request.async.DeferredResult;
-import org.thingsboard.server.common.data.id.SessionId;
 import org.thingsboard.server.common.msg.core.*;
 import org.thingsboard.server.common.msg.session.*;
 import org.thingsboard.server.common.msg.session.ex.SessionException;
diff --git a/transport/http/src/main/java/org/thingsboard/server/transport/http/session/HttpSessionId.java b/transport/http/src/main/java/org/thingsboard/server/transport/http/session/HttpSessionId.java
index 3211765..a5426ca 100644
--- a/transport/http/src/main/java/org/thingsboard/server/transport/http/session/HttpSessionId.java
+++ b/transport/http/src/main/java/org/thingsboard/server/transport/http/session/HttpSessionId.java
@@ -15,8 +15,6 @@
  */
 package org.thingsboard.server.transport.http.session;
 
-import org.thingsboard.server.common.data.id.SessionId;
-
 import java.util.UUID;
 
 /**
diff --git a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/adaptors/JsonMqttAdaptor.java b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/adaptors/JsonMqttAdaptor.java
index a2be169..85dc813 100644
--- a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/adaptors/JsonMqttAdaptor.java
+++ b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/adaptors/JsonMqttAdaptor.java
@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2018 The Thingsboard Authors
- *
+ * <p>
  * Licensed 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
- *
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
  * 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.
@@ -17,6 +17,7 @@ package org.thingsboard.server.transport.mqtt.adaptors;
 
 import com.google.gson.Gson;
 import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
 import com.google.gson.JsonSyntaxException;
 import io.netty.buffer.ByteBuf;
@@ -26,7 +27,8 @@ import io.netty.handler.codec.mqtt.*;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.stereotype.Component;
 import org.springframework.util.StringUtils;
-import org.thingsboard.server.common.data.id.SessionId;
+import org.thingsboard.server.common.data.kv.AttributeKvEntry;
+import org.thingsboard.server.common.data.kv.KvEntry;
 import org.thingsboard.server.common.msg.core.*;
 import org.thingsboard.server.common.msg.kv.AttributesKVMsg;
 import org.thingsboard.server.common.msg.session.*;
@@ -36,12 +38,15 @@ import org.thingsboard.server.gen.transport.TransportProtos;
 import org.thingsboard.server.transport.mqtt.MqttTopics;
 import org.thingsboard.server.transport.mqtt.session.DeviceSessionCtx;
 import org.thingsboard.server.transport.mqtt.MqttTransportHandler;
+import org.thingsboard.server.transport.mqtt.session.MqttDeviceAwareSessionContext;
 
 import java.nio.charset.Charset;
 import java.util.Arrays;
 import java.util.HashSet;
+import java.util.List;
 import java.util.Optional;
 import java.util.Set;
+import java.util.UUID;
 
 /**
  * @author Andrew Shvayka
@@ -55,7 +60,7 @@ public class JsonMqttAdaptor implements MqttTransportAdaptor {
     private static final ByteBufAllocator ALLOCATOR = new UnpooledByteBufAllocator(false);
 
     @Override
-    public TransportProtos.PostTelemetryMsg convertToPostTelemetry(DeviceSessionCtx ctx, MqttPublishMessage inbound) throws AdaptorException {
+    public TransportProtos.PostTelemetryMsg convertToPostTelemetry(MqttDeviceAwareSessionContext ctx, MqttPublishMessage inbound) throws AdaptorException {
         String payload = validatePayload(ctx.getSessionId(), inbound.payload());
         try {
             return JsonConverter.convertToTelemetryProto(new JsonParser().parse(payload));
@@ -65,7 +70,7 @@ public class JsonMqttAdaptor implements MqttTransportAdaptor {
     }
 
     @Override
-    public TransportProtos.PostAttributeMsg convertToPostAttributes(DeviceSessionCtx ctx, MqttPublishMessage inbound) throws AdaptorException {
+    public TransportProtos.PostAttributeMsg convertToPostAttributes(MqttDeviceAwareSessionContext ctx, MqttPublishMessage inbound) throws AdaptorException {
         String payload = validatePayload(ctx.getSessionId(), inbound.payload());
         try {
             return JsonConverter.convertToAttributesProto(new JsonParser().parse(payload));
@@ -75,7 +80,7 @@ public class JsonMqttAdaptor implements MqttTransportAdaptor {
     }
 
     @Override
-    public TransportProtos.GetAttributeRequestMsg convertToGetAttributes(DeviceSessionCtx ctx, MqttPublishMessage inbound) throws AdaptorException {
+    public TransportProtos.GetAttributeRequestMsg convertToGetAttributes(MqttDeviceAwareSessionContext ctx, MqttPublishMessage inbound) throws AdaptorException {
         String topicName = inbound.variableHeader().topicName();
         try {
             TransportProtos.GetAttributeRequestMsg.Builder result = TransportProtos.GetAttributeRequestMsg.newBuilder();
@@ -98,7 +103,7 @@ public class JsonMqttAdaptor implements MqttTransportAdaptor {
     }
 
     @Override
-    public TransportProtos.ToDeviceRpcResponseMsg convertToDeviceRpcResponse(DeviceSessionCtx ctx, MqttPublishMessage inbound) throws AdaptorException {
+    public TransportProtos.ToDeviceRpcResponseMsg convertToDeviceRpcResponse(MqttDeviceAwareSessionContext ctx, MqttPublishMessage inbound) throws AdaptorException {
         String topicName = inbound.variableHeader().topicName();
         try {
             Integer requestId = Integer.valueOf(topicName.substring(MqttTopics.DEVICE_RPC_RESPONSE_TOPIC.length()));
@@ -111,7 +116,7 @@ public class JsonMqttAdaptor implements MqttTransportAdaptor {
     }
 
     @Override
-    public TransportProtos.ToServerRpcRequestMsg convertToServerRpcRequest(DeviceSessionCtx ctx, MqttPublishMessage inbound) throws AdaptorException {
+    public TransportProtos.ToServerRpcRequestMsg convertToServerRpcRequest(MqttDeviceAwareSessionContext ctx, MqttPublishMessage inbound) throws AdaptorException {
         String topicName = inbound.variableHeader().topicName();
         String payload = validatePayload(ctx.getSessionId(), inbound.payload());
         try {
@@ -123,7 +128,7 @@ public class JsonMqttAdaptor implements MqttTransportAdaptor {
     }
 
     @Override
-    public Optional<MqttMessage> convertToPublish(DeviceSessionCtx ctx, TransportProtos.GetAttributeResponseMsg responseMsg) throws AdaptorException {
+    public Optional<MqttMessage> convertToPublish(MqttDeviceAwareSessionContext ctx, TransportProtos.GetAttributeResponseMsg responseMsg) throws AdaptorException {
         if (!StringUtils.isEmpty(responseMsg.getError())) {
             throw new AdaptorException(responseMsg.getError());
         } else {
@@ -138,99 +143,37 @@ public class JsonMqttAdaptor implements MqttTransportAdaptor {
     }
 
     @Override
-    public Optional<MqttMessage> convertToPublish(DeviceSessionCtx ctx, TransportProtos.AttributeUpdateNotificationMsg notificationMsg) throws AdaptorException {
-        return Optional.of(createMqttPublishMsg(ctx, MqttTopics.DEVICE_ATTRIBUTES_TOPIC, JsonConverter.toJson(notificationMsg)));
+    public Optional<MqttMessage> convertToGatewayPublish(MqttDeviceAwareSessionContext ctx, TransportProtos.GetAttributeResponseMsg responseMsg) throws AdaptorException {
+        if (!StringUtils.isEmpty(responseMsg.getError())) {
+            throw new AdaptorException(responseMsg.getError());
+        } else {
+            JsonObject result = JsonConverter.getJsonObjectForGateway(responseMsg);
+            return Optional.of(createMqttPublishMsg(ctx, MqttTopics.GATEWAY_ATTRIBUTES_RESPONSE_TOPIC, result));
+        }
     }
 
     @Override
-    public Optional<MqttMessage> convertToPublish(DeviceSessionCtx ctx, TransportProtos.ToDeviceRpcRequestMsg rpcRequest) throws AdaptorException {
-        return Optional.of(createMqttPublishMsg(ctx, MqttTopics.DEVICE_RPC_REQUESTS_TOPIC + rpcRequest.getRequestId(), JsonConverter.toJson(rpcRequest, false)));
+    public Optional<MqttMessage> convertToPublish(MqttDeviceAwareSessionContext ctx, TransportProtos.AttributeUpdateNotificationMsg notificationMsg) throws AdaptorException {
+        return Optional.of(createMqttPublishMsg(ctx, MqttTopics.DEVICE_ATTRIBUTES_TOPIC, JsonConverter.toJson(notificationMsg)));
     }
 
     @Override
-    public Optional<MqttMessage> convertToPublish(DeviceSessionCtx ctx, TransportProtos.ToServerRpcResponseMsg rpcResponse) {
-        return Optional.of(createMqttPublishMsg(ctx, MqttTopics.DEVICE_RPC_RESPONSE_TOPIC + rpcResponse.getRequestId(), JsonConverter.toJson(rpcResponse)));
+    public Optional<MqttMessage> convertToGatewayPublish(MqttDeviceAwareSessionContext ctx, String deviceName, TransportProtos.AttributeUpdateNotificationMsg notificationMsg) throws AdaptorException {
+        JsonObject result = JsonConverter.getJsonObjectForGateway(deviceName, notificationMsg);
+        return Optional.of(createMqttPublishMsg(ctx, MqttTopics.GATEWAY_ATTRIBUTES_TOPIC, result));
     }
 
     @Override
-    public AdaptorToSessionActorMsg convertToActorMsg(DeviceSessionCtx ctx, SessionMsgType type, MqttMessage inbound) throws AdaptorException {
-        FromDeviceMsg msg;
-        switch (type) {
-            case POST_TELEMETRY_REQUEST:
-                msg = convertToTelemetryUploadRequest(ctx, (MqttPublishMessage) inbound);
-                break;
-            case POST_ATTRIBUTES_REQUEST:
-                msg = convertToUpdateAttributesRequest(ctx, (MqttPublishMessage) inbound);
-                break;
-            case SUBSCRIBE_ATTRIBUTES_REQUEST:
-                msg = new AttributesSubscribeMsg();
-                break;
-            case UNSUBSCRIBE_ATTRIBUTES_REQUEST:
-                msg = new AttributesUnsubscribeMsg();
-                break;
-            case SUBSCRIBE_RPC_COMMANDS_REQUEST:
-                msg = new RpcSubscribeMsg();
-                break;
-            case UNSUBSCRIBE_RPC_COMMANDS_REQUEST:
-                msg = new RpcUnsubscribeMsg();
-                break;
-            case GET_ATTRIBUTES_REQUEST:
-                msg = convertToGetAttributesRequest(ctx, (MqttPublishMessage) inbound);
-                break;
-            case TO_DEVICE_RPC_RESPONSE:
-                msg = convertToRpcCommandResponse(ctx, (MqttPublishMessage) inbound);
-                break;
-            case TO_SERVER_RPC_REQUEST:
-                msg = null;//convertToServerRpcRequest(ctx, (MqttPublishMessage) inbound);
-                break;
-            default:
-                log.warn("[{}] Unsupported msg type: {}!", ctx.getSessionId(), type);
-                throw new AdaptorException(new IllegalArgumentException("Unsupported msg type: " + type + "!"));
-        }
-        return new BasicAdaptorToSessionActorMsg(ctx, msg);
+    public Optional<MqttMessage> convertToPublish(MqttDeviceAwareSessionContext ctx, TransportProtos.ToDeviceRpcRequestMsg rpcRequest) throws AdaptorException {
+        return Optional.of(createMqttPublishMsg(ctx, MqttTopics.DEVICE_RPC_REQUESTS_TOPIC + rpcRequest.getRequestId(), JsonConverter.toJson(rpcRequest, false)));
     }
 
     @Override
-    public Optional<MqttMessage> convertToAdaptorMsg(DeviceSessionCtx ctx, SessionActorToAdaptorMsg sessionMsg) throws AdaptorException {
-        MqttMessage result = null;
-        ToDeviceMsg msg = sessionMsg.getMsg();
-        switch (msg.getSessionMsgType()) {
-            case STATUS_CODE_RESPONSE:
-            case GET_ATTRIBUTES_RESPONSE:
-                ResponseMsg<?> responseMsg = (ResponseMsg) msg;
-                Optional<Exception> responseError = responseMsg.getError();
-                if (responseMsg.isSuccess()) {
-                    result = convertResponseMsg(ctx, msg, responseMsg, responseError);
-                } else {
-                    if (responseError.isPresent()) {
-                        throw new AdaptorException(responseError.get());
-                    }
-                }
-                break;
-            case ATTRIBUTES_UPDATE_NOTIFICATION:
-                AttributesUpdateNotification notification = (AttributesUpdateNotification) msg;
-                result = createMqttPublishMsg(ctx, MqttTopics.DEVICE_ATTRIBUTES_TOPIC, notification.getData(), false);
-                break;
-            case TO_DEVICE_RPC_REQUEST:
-                ToDeviceRpcRequestMsg rpcRequest = (ToDeviceRpcRequestMsg) msg;
-                result = createMqttPublishMsg(ctx, MqttTopics.DEVICE_RPC_REQUESTS_TOPIC + rpcRequest.getRequestId(), rpcRequest);
-                break;
-            case TO_SERVER_RPC_RESPONSE:
-//                ToServerRpcResponseMsg rpcResponse = (ToServerRpcResponseMsg) msg;
-//                result = createMqttPublishMsg(ctx, MqttTopics.DEVICE_RPC_RESPONSE_TOPIC + rpcResponse.getRequestId(),
-//                        rpcResponse);
-                break;
-            case RULE_ENGINE_ERROR:
-                RuleEngineErrorMsg errorMsg = (RuleEngineErrorMsg) msg;
-                result = createMqttPublishMsg(ctx, "errors", JsonConverter.toErrorJson(errorMsg.getErrorMsg()));
-                break;
-            default:
-                break;
-        }
-        return Optional.ofNullable(result);
+    public Optional<MqttMessage> convertToPublish(MqttDeviceAwareSessionContext ctx, TransportProtos.ToServerRpcResponseMsg rpcResponse) {
+        return Optional.of(createMqttPublishMsg(ctx, MqttTopics.DEVICE_RPC_RESPONSE_TOPIC + rpcResponse.getRequestId(), JsonConverter.toJson(rpcResponse)));
     }
 
-    private MqttMessage convertResponseMsg(DeviceSessionCtx ctx, ToDeviceMsg msg,
+    private MqttMessage convertResponseMsg(MqttDeviceAwareSessionContext ctx, ToDeviceMsg msg,
                                            ResponseMsg<?> responseMsg, Optional<Exception> responseError) throws AdaptorException {
         MqttMessage result = null;
         SessionMsgType requestMsgType = responseMsg.getRequestMsgType();
@@ -255,19 +198,19 @@ public class JsonMqttAdaptor implements MqttTransportAdaptor {
         return result;
     }
 
-    private MqttPublishMessage createMqttPublishMsg(DeviceSessionCtx ctx, String topic, AttributesKVMsg msg, boolean asMap) {
+    private MqttPublishMessage createMqttPublishMsg(MqttDeviceAwareSessionContext ctx, String topic, AttributesKVMsg msg, boolean asMap) {
         return createMqttPublishMsg(ctx, topic, JsonConverter.toJson(msg, asMap));
     }
 
-    private MqttPublishMessage createMqttPublishMsg(DeviceSessionCtx ctx, String topic, ToDeviceRpcRequestMsg msg) {
+    private MqttPublishMessage createMqttPublishMsg(MqttDeviceAwareSessionContext ctx, String topic, ToDeviceRpcRequestMsg msg) {
         return createMqttPublishMsg(ctx, topic, JsonConverter.toJson(msg, false));
     }
 
-    private MqttPublishMessage createMqttPublishMsg(DeviceSessionCtx ctx, String topic, TransportProtos.ToServerRpcResponseMsg msg) {
+    private MqttPublishMessage createMqttPublishMsg(MqttDeviceAwareSessionContext ctx, String topic, TransportProtos.ToServerRpcResponseMsg msg) {
         return createMqttPublishMsg(ctx, topic, JsonConverter.toJson(msg));
     }
 
-    private MqttPublishMessage createMqttPublishMsg(DeviceSessionCtx ctx, String topic, JsonElement json) {
+    private MqttPublishMessage createMqttPublishMsg(MqttDeviceAwareSessionContext ctx, String topic, JsonElement json) {
         MqttFixedHeader mqttFixedHeader =
                 new MqttFixedHeader(MqttMessageType.PUBLISH, false, ctx.getQoSForTopic(topic), false, 0);
         MqttPublishVariableHeader header = new MqttPublishVariableHeader(topic, ctx.nextMsgId());
@@ -276,7 +219,7 @@ public class JsonMqttAdaptor implements MqttTransportAdaptor {
         return new MqttPublishMessage(mqttFixedHeader, header, payload);
     }
 
-    private FromDeviceMsg convertToGetAttributesRequest(DeviceSessionCtx ctx, MqttPublishMessage inbound) throws AdaptorException {
+    private FromDeviceMsg convertToGetAttributesRequest(MqttDeviceAwareSessionContext ctx, MqttPublishMessage inbound) throws AdaptorException {
         String topicName = inbound.variableHeader().topicName();
         try {
             Integer requestId = Integer.valueOf(topicName.substring(MqttTopics.DEVICE_ATTRIBUTES_REQUEST_TOPIC_PREFIX.length()));
@@ -295,7 +238,7 @@ public class JsonMqttAdaptor implements MqttTransportAdaptor {
         }
     }
 
-    private FromDeviceMsg convertToRpcCommandResponse(DeviceSessionCtx ctx, MqttPublishMessage inbound) throws AdaptorException {
+    private FromDeviceMsg convertToRpcCommandResponse(MqttDeviceAwareSessionContext ctx, MqttPublishMessage inbound) throws AdaptorException {
         String topicName = inbound.variableHeader().topicName();
         try {
             Integer requestId = Integer.valueOf(topicName.substring(MqttTopics.DEVICE_RPC_RESPONSE_TOPIC.length()));
@@ -336,7 +279,7 @@ public class JsonMqttAdaptor implements MqttTransportAdaptor {
         }
     }
 
-    public static JsonElement validateJsonPayload(SessionId sessionId, ByteBuf payloadData) throws AdaptorException {
+    public static JsonElement validateJsonPayload(UUID sessionId, ByteBuf payloadData) throws AdaptorException {
         String payload = validatePayload(sessionId, payloadData);
         try {
             return new JsonParser().parse(payload);
@@ -345,11 +288,11 @@ public class JsonMqttAdaptor implements MqttTransportAdaptor {
         }
     }
 
-    public static String validatePayload(SessionId sessionId, ByteBuf payloadData) throws AdaptorException {
+    public static String validatePayload(UUID sessionId, ByteBuf payloadData) throws AdaptorException {
         try {
             String payload = payloadData.toString(UTF8);
             if (payload == null) {
-                log.warn("[{}] Payload is empty!", sessionId.toUidStr());
+                log.warn("[{}] Payload is empty!", sessionId);
                 throw new AdaptorException(new IllegalArgumentException("Payload is empty!"));
             }
             return payload;
diff --git a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/adaptors/MqttTransportAdaptor.java b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/adaptors/MqttTransportAdaptor.java
index 48173f9..37b5395 100644
--- a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/adaptors/MqttTransportAdaptor.java
+++ b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/adaptors/MqttTransportAdaptor.java
@@ -17,41 +17,44 @@ package org.thingsboard.server.transport.mqtt.adaptors;
 
 import io.netty.handler.codec.mqtt.MqttMessage;
 import io.netty.handler.codec.mqtt.MqttPublishMessage;
-import org.thingsboard.server.common.transport.TransportAdaptor;
 import org.thingsboard.server.common.transport.adaptor.AdaptorException;
-import org.thingsboard.server.gen.transport.TransportProtos.ToServerRpcResponseMsg;
-import org.thingsboard.server.gen.transport.TransportProtos.ToServerRpcRequestMsg;
-import org.thingsboard.server.gen.transport.TransportProtos.ToDeviceRpcResponseMsg;
 import org.thingsboard.server.gen.transport.TransportProtos.AttributeUpdateNotificationMsg;
 import org.thingsboard.server.gen.transport.TransportProtos.GetAttributeRequestMsg;
 import org.thingsboard.server.gen.transport.TransportProtos.GetAttributeResponseMsg;
 import org.thingsboard.server.gen.transport.TransportProtos.PostAttributeMsg;
 import org.thingsboard.server.gen.transport.TransportProtos.PostTelemetryMsg;
 import org.thingsboard.server.gen.transport.TransportProtos.ToDeviceRpcRequestMsg;
-import org.thingsboard.server.transport.mqtt.session.DeviceSessionCtx;
+import org.thingsboard.server.gen.transport.TransportProtos.ToDeviceRpcResponseMsg;
+import org.thingsboard.server.gen.transport.TransportProtos.ToServerRpcRequestMsg;
+import org.thingsboard.server.gen.transport.TransportProtos.ToServerRpcResponseMsg;
+import org.thingsboard.server.transport.mqtt.session.MqttDeviceAwareSessionContext;
 
 import java.util.Optional;
 
 /**
  * @author Andrew Shvayka
  */
-public interface MqttTransportAdaptor extends TransportAdaptor<DeviceSessionCtx, MqttMessage, MqttMessage> {
+public interface MqttTransportAdaptor {
+
+    PostTelemetryMsg convertToPostTelemetry(MqttDeviceAwareSessionContext ctx, MqttPublishMessage inbound) throws AdaptorException;
+
+    PostAttributeMsg convertToPostAttributes(MqttDeviceAwareSessionContext ctx, MqttPublishMessage inbound) throws AdaptorException;
 
-    PostTelemetryMsg convertToPostTelemetry(DeviceSessionCtx ctx, MqttPublishMessage inbound) throws AdaptorException;
+    GetAttributeRequestMsg convertToGetAttributes(MqttDeviceAwareSessionContext ctx, MqttPublishMessage inbound) throws AdaptorException;
 
-    PostAttributeMsg convertToPostAttributes(DeviceSessionCtx ctx, MqttPublishMessage inbound) throws AdaptorException;
+    ToDeviceRpcResponseMsg convertToDeviceRpcResponse(MqttDeviceAwareSessionContext ctx, MqttPublishMessage mqttMsg) throws AdaptorException;
 
-    GetAttributeRequestMsg convertToGetAttributes(DeviceSessionCtx ctx, MqttPublishMessage inbound) throws AdaptorException;
+    ToServerRpcRequestMsg convertToServerRpcRequest(MqttDeviceAwareSessionContext ctx, MqttPublishMessage mqttMsg) throws AdaptorException;
 
-    ToDeviceRpcResponseMsg convertToDeviceRpcResponse(DeviceSessionCtx ctx, MqttPublishMessage mqttMsg) throws AdaptorException;
+    Optional<MqttMessage> convertToPublish(MqttDeviceAwareSessionContext ctx, GetAttributeResponseMsg responseMsg) throws AdaptorException;
 
-    ToServerRpcRequestMsg convertToServerRpcRequest(DeviceSessionCtx ctx, MqttPublishMessage mqttMsg) throws AdaptorException;
+    Optional<MqttMessage> convertToGatewayPublish(MqttDeviceAwareSessionContext ctx, GetAttributeResponseMsg responseMsg) throws AdaptorException;
 
-    Optional<MqttMessage> convertToPublish(DeviceSessionCtx ctx, GetAttributeResponseMsg responseMsg) throws AdaptorException;
+    Optional<MqttMessage> convertToPublish(MqttDeviceAwareSessionContext ctx, AttributeUpdateNotificationMsg notificationMsg) throws AdaptorException;
 
-    Optional<MqttMessage> convertToPublish(DeviceSessionCtx ctx, AttributeUpdateNotificationMsg notificationMsg) throws AdaptorException;
+    Optional<MqttMessage> convertToGatewayPublish(MqttDeviceAwareSessionContext ctx, String deviceName, AttributeUpdateNotificationMsg notificationMsg) throws AdaptorException;
 
-    Optional<MqttMessage> convertToPublish(DeviceSessionCtx ctx, ToDeviceRpcRequestMsg rpcRequest) throws AdaptorException;
+    Optional<MqttMessage> convertToPublish(MqttDeviceAwareSessionContext ctx, ToDeviceRpcRequestMsg rpcRequest) throws AdaptorException;
 
-    Optional<MqttMessage> convertToPublish(DeviceSessionCtx ctx, ToServerRpcResponseMsg rpcResponse);
+    Optional<MqttMessage> convertToPublish(MqttDeviceAwareSessionContext ctx, ToServerRpcResponseMsg rpcResponse) throws AdaptorException;
 }
diff --git a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/MqttTransportContext.java b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/MqttTransportContext.java
index b500a31..2c8ff59 100644
--- a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/MqttTransportContext.java
+++ b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/MqttTransportContext.java
@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2018 The Thingsboard Authors
- *
+ * <p>
  * Licensed 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
- *
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
  * 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.
@@ -18,6 +18,7 @@ package org.thingsboard.server.transport.mqtt;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import io.netty.handler.ssl.SslHandler;
 import lombok.Data;
+import lombok.Getter;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.RandomStringUtils;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -30,8 +31,11 @@ import org.thingsboard.server.common.transport.quota.host.HostRequestsQuotaServi
 import org.thingsboard.server.transport.mqtt.adaptors.MqttTransportAdaptor;
 
 import javax.annotation.PostConstruct;
+import javax.annotation.PreDestroy;
 import java.net.InetAddress;
 import java.net.UnknownHostException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
 
 /**
  * Created by ashvayka on 04.10.18.
@@ -64,6 +68,9 @@ public class MqttTransportContext {
 
     private SslHandler sslHandler;
 
+    @Getter
+    private ExecutorService executor;
+
     @PostConstruct
     public void init() {
         if (StringUtils.isEmpty(nodeId)) {
@@ -74,6 +81,14 @@ public class MqttTransportContext {
             }
         }
         log.info("Current NodeId: {}", nodeId);
+        executor = Executors.newCachedThreadPool();
+    }
+
+    @PreDestroy
+    public void stop() {
+        if (executor != null) {
+            executor.shutdownNow();
+        }
     }
 
 }
diff --git a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/MqttTransportHandler.java b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/MqttTransportHandler.java
index 3099b24..21d3335 100644
--- a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/MqttTransportHandler.java
+++ b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/MqttTransportHandler.java
@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2018 The Thingsboard Authors
- *
+ * <p>
  * Licensed 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
- *
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
  * 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.
@@ -108,7 +108,7 @@ public class MqttTransportHandler extends ChannelInboundHandlerAdapter implement
         this.quotaService = context.getQuotaService();
         this.sslHandler = context.getSslHandler();
         this.mqttQoSMap = new ConcurrentHashMap<>();
-        this.deviceSessionCtx = new DeviceSessionCtx(mqttQoSMap);
+        this.deviceSessionCtx = new DeviceSessionCtx(sessionId, mqttQoSMap);
     }
 
     @Override
@@ -176,42 +176,40 @@ public class MqttTransportHandler extends ChannelInboundHandlerAdapter implement
 
         if (topicName.startsWith(MqttTopics.BASE_GATEWAY_API_TOPIC)) {
             if (gatewaySessionCtx != null) {
-                gatewaySessionCtx.setChannel(ctx);
-//                handleMqttPublishMsg(topicName, msgId, mqttMsg);
+                handleGatewayPublishMsg(topicName, msgId, mqttMsg);
             }
         } else {
             processDevicePublish(ctx, mqttMsg, topicName, msgId);
         }
     }
 
-    //
-//    private void handleMqttPublishMsg(String topicName, int msgId, MqttPublishMessage mqttMsg) {
-//        try {
-//            switch (topicName) {
-//                case GATEWAY_TELEMETRY_TOPIC:
-//                    gatewaySessionCtx.onDeviceTelemetry(mqttMsg);
-//                    break;
-//                case GATEWAY_ATTRIBUTES_TOPIC:
-//                    gatewaySessionCtx.onDeviceAttributes(mqttMsg);
-//                    break;
-//                case GATEWAY_ATTRIBUTES_REQUEST_TOPIC:
-//                    gatewaySessionCtx.onDeviceAttributesRequest(mqttMsg);
-//                    break;
-//                case GATEWAY_RPC_TOPIC:
-//                    gatewaySessionCtx.onDeviceRpcResponse(mqttMsg);
-//                    break;
-//                case GATEWAY_CONNECT_TOPIC:
-//                    gatewaySessionCtx.onDeviceConnect(mqttMsg);
-//                    break;
-//                case GATEWAY_DISCONNECT_TOPIC:
-//                    gatewaySessionCtx.onDeviceDisconnect(mqttMsg);
-//                    break;
-//            }
-//        } catch (RuntimeException | AdaptorException e) {
-//            log.warn("[{}] Failed to process publish msg [{}][{}]", sessionId, topicName, msgId, e);
-//        }
-//    }
-//
+    private void handleGatewayPublishMsg(String topicName, int msgId, MqttPublishMessage mqttMsg) {
+        try {
+            switch (topicName) {
+                case MqttTopics.GATEWAY_TELEMETRY_TOPIC:
+                    gatewaySessionCtx.onDeviceTelemetry(mqttMsg);
+                    break;
+                case MqttTopics.GATEWAY_ATTRIBUTES_TOPIC:
+                    gatewaySessionCtx.onDeviceAttributes(mqttMsg);
+                    break;
+                case MqttTopics.GATEWAY_ATTRIBUTES_REQUEST_TOPIC:
+                    gatewaySessionCtx.onDeviceAttributesRequest(mqttMsg);
+                    break;
+                case MqttTopics.GATEWAY_RPC_TOPIC:
+                    gatewaySessionCtx.onDeviceRpcResponse(mqttMsg);
+                    break;
+                case MqttTopics.GATEWAY_CONNECT_TOPIC:
+                    gatewaySessionCtx.onDeviceConnect(mqttMsg);
+                    break;
+                case MqttTopics.GATEWAY_DISCONNECT_TOPIC:
+                    gatewaySessionCtx.onDeviceDisconnect(mqttMsg);
+                    break;
+            }
+        } catch (RuntimeException | AdaptorException e) {
+            log.warn("[{}] Failed to process publish msg [{}][{}]", sessionId, topicName, msgId, e);
+        }
+    }
+
     private void processDevicePublish(ChannelHandlerContext ctx, MqttPublishMessage mqttMsg, String topicName, int msgId) {
         try {
             if (topicName.equals(MqttTopics.DEVICE_TELEMETRY_TOPIC)) {
@@ -223,10 +221,10 @@ public class MqttTransportHandler extends ChannelInboundHandlerAdapter implement
             } else if (topicName.startsWith(MqttTopics.DEVICE_ATTRIBUTES_REQUEST_TOPIC_PREFIX)) {
                 TransportProtos.GetAttributeRequestMsg getAttributeMsg = adaptor.convertToGetAttributes(deviceSessionCtx, mqttMsg);
                 transportService.process(sessionInfo, getAttributeMsg, getPubAckCallback(ctx, msgId, getAttributeMsg));
-            } else if (topicName.startsWith(MqttTopics.DEVICE_RPC_RESPONSE_TOPIC)){
+            } else if (topicName.startsWith(MqttTopics.DEVICE_RPC_RESPONSE_TOPIC)) {
                 TransportProtos.ToDeviceRpcResponseMsg rpcResponseMsg = adaptor.convertToDeviceRpcResponse(deviceSessionCtx, mqttMsg);
                 transportService.process(sessionInfo, rpcResponseMsg, getPubAckCallback(ctx, msgId, rpcResponseMsg));
-            } else if (topicName.startsWith(MqttTopics.DEVICE_RPC_REQUESTS_TOPIC)){
+            } else if (topicName.startsWith(MqttTopics.DEVICE_RPC_REQUESTS_TOPIC)) {
                 TransportProtos.ToServerRpcRequestMsg rpcRequestMsg = adaptor.convertToServerRpcRequest(deviceSessionCtx, mqttMsg);
                 transportService.process(sessionInfo, rpcRequestMsg, getPubAckCallback(ctx, msgId, rpcRequestMsg));
             }
@@ -469,7 +467,7 @@ public class MqttTransportHandler extends ChannelInboundHandlerAdapter implement
             if (infoNode != null) {
                 JsonNode gatewayNode = infoNode.get("gateway");
                 if (gatewayNode != null && gatewayNode.asBoolean()) {
-                    gatewaySessionCtx = new GatewaySessionCtx(deviceSessionCtx);
+                    gatewaySessionCtx = new GatewaySessionCtx(context, deviceSessionCtx, sessionId);
                 }
             }
         } catch (IOException e) {
@@ -477,7 +475,7 @@ public class MqttTransportHandler extends ChannelInboundHandlerAdapter implement
         }
     }
 
-    private SessionEventMsg getSessionEventMsg(SessionEvent event) {
+    public static SessionEventMsg getSessionEventMsg(SessionEvent event) {
         return SessionEventMsg.newBuilder()
                 .setSessionType(TransportProtos.SessionType.ASYNC)
                 .setEvent(event).build();
diff --git a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/DeviceSessionCtx.java b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/DeviceSessionCtx.java
index 6bbb9fa..6195fdd 100644
--- a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/DeviceSessionCtx.java
+++ b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/DeviceSessionCtx.java
@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2018 The Thingsboard Authors
- *
+ * <p>
  * Licensed 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
- *
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
  * 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.
@@ -19,19 +19,14 @@ import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.mqtt.*;
 import lombok.Getter;
 import lombok.extern.slf4j.Slf4j;
-import org.thingsboard.server.common.data.id.SessionId;
 import org.thingsboard.server.common.msg.session.SessionActorToAdaptorMsg;
 import org.thingsboard.server.common.msg.session.SessionCtrlMsg;
 import org.thingsboard.server.common.msg.session.SessionType;
 import org.thingsboard.server.common.msg.session.ctrl.SessionCloseMsg;
 import org.thingsboard.server.common.msg.session.ex.SessionException;
-import org.thingsboard.server.common.transport.SessionMsgProcessor;
 import org.thingsboard.server.common.transport.adaptor.AdaptorException;
-import org.thingsboard.server.common.transport.auth.DeviceAuthService;
-import org.thingsboard.server.common.transport.session.DeviceAwareSessionContext;
-import org.thingsboard.server.transport.mqtt.adaptors.MqttTransportAdaptor;
 
-import java.util.Map;
+import java.util.UUID;
 import java.util.concurrent.ConcurrentMap;
 import java.util.concurrent.atomic.AtomicInteger;
 
@@ -41,14 +36,14 @@ import java.util.concurrent.atomic.AtomicInteger;
 @Slf4j
 public class DeviceSessionCtx extends MqttDeviceAwareSessionContext {
 
-    private final MqttSessionId sessionId;
+    private final UUID sessionId;
     @Getter
     private ChannelHandlerContext channel;
     private AtomicInteger msgIdSeq = new AtomicInteger(0);
 
-    public DeviceSessionCtx(ConcurrentMap<String, Integer> mqttQoSMap) {
+    public DeviceSessionCtx(UUID sessionId, ConcurrentMap<String, Integer> mqttQoSMap) {
         super(null, null, mqttQoSMap);
-        this.sessionId = new MqttSessionId();
+        this.sessionId = sessionId;
     }
 
     @Override
@@ -94,7 +89,7 @@ public class DeviceSessionCtx extends MqttDeviceAwareSessionContext {
     }
 
     @Override
-    public SessionId getSessionId() {
+    public UUID getSessionId() {
         return sessionId;
     }
 
diff --git a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/GatewayDeviceSessionCtx.java b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/GatewayDeviceSessionCtx.java
index 793836d..387d9cf 100644
--- a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/GatewayDeviceSessionCtx.java
+++ b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/GatewayDeviceSessionCtx.java
@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2018 The Thingsboard Authors
- *
+ * <p>
  * Licensed 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
- *
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
  * 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.
@@ -16,70 +16,80 @@
 package org.thingsboard.server.transport.mqtt.session;
 
 import com.google.gson.Gson;
-import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
+import com.sun.xml.internal.bind.v2.TODO;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.ByteBufAllocator;
 import io.netty.buffer.UnpooledByteBufAllocator;
-import io.netty.handler.codec.mqtt.*;
-import org.thingsboard.server.common.data.Device;
-import org.thingsboard.server.common.data.id.SessionId;
+import io.netty.handler.codec.mqtt.MqttFixedHeader;
+import io.netty.handler.codec.mqtt.MqttMessage;
+import io.netty.handler.codec.mqtt.MqttMessageType;
+import io.netty.handler.codec.mqtt.MqttPublishMessage;
+import io.netty.handler.codec.mqtt.MqttPublishVariableHeader;
+import lombok.extern.slf4j.Slf4j;
 import org.thingsboard.server.common.data.kv.AttributeKvEntry;
 import org.thingsboard.server.common.data.kv.KvEntry;
-import org.thingsboard.server.common.msg.core.*;
+import org.thingsboard.server.common.msg.core.AttributesUpdateNotification;
+import org.thingsboard.server.common.msg.core.GetAttributesResponse;
+import org.thingsboard.server.common.msg.core.ResponseMsg;
+import org.thingsboard.server.common.msg.core.ToDeviceRpcRequestMsg;
 import org.thingsboard.server.common.msg.kv.AttributesKVMsg;
-import org.thingsboard.server.common.msg.session.*;
-import org.thingsboard.server.common.msg.session.ex.SessionException;
+import org.thingsboard.server.common.msg.session.SessionActorToAdaptorMsg;
+import org.thingsboard.server.common.msg.session.SessionMsgType;
+import org.thingsboard.server.common.msg.session.ToDeviceMsg;
+import org.thingsboard.server.common.transport.SessionMsgListener;
 import org.thingsboard.server.common.transport.adaptor.JsonConverter;
-import org.thingsboard.server.common.transport.session.DeviceAwareSessionContext;
+import org.thingsboard.server.gen.transport.TransportProtos;
+import org.thingsboard.server.gen.transport.TransportProtos.DeviceInfoProto;
+import org.thingsboard.server.gen.transport.TransportProtos.SessionInfoProto;
 import org.thingsboard.server.transport.mqtt.MqttTopics;
 import org.thingsboard.server.transport.mqtt.MqttTransportHandler;
 
 import java.nio.charset.Charset;
 import java.util.List;
-import java.util.Map;
 import java.util.Optional;
+import java.util.UUID;
 import java.util.concurrent.ConcurrentMap;
 import java.util.concurrent.atomic.AtomicInteger;
 
 /**
  * Created by ashvayka on 19.01.17.
  */
-public class GatewayDeviceSessionCtx extends MqttDeviceAwareSessionContext {
+@Slf4j
+public class GatewayDeviceSessionCtx extends MqttDeviceAwareSessionContext implements SessionMsgListener {
 
     private static final Gson GSON = new Gson();
     private static final Charset UTF8 = Charset.forName("UTF-8");
     private static final ByteBufAllocator ALLOCATOR = new UnpooledByteBufAllocator(false);
-    public static final String DEVICE_PROPERTY = "device";
 
-    private GatewaySessionCtx parent;
-    private final MqttSessionId sessionId;
+    private final GatewaySessionCtx parent;
+    private final UUID sessionId;
+    private final SessionInfoProto sessionInfo;
     private volatile boolean closed;
     private AtomicInteger msgIdSeq = new AtomicInteger(0);
 
-    public GatewayDeviceSessionCtx(GatewaySessionCtx parent, Device device, ConcurrentMap<String, Integer> mqttQoSMap) {
-        super(parent.getProcessor(), parent.getAuthService(), device, mqttQoSMap);
+    public GatewayDeviceSessionCtx(GatewaySessionCtx parent, DeviceInfoProto deviceInfo, ConcurrentMap<String, Integer> mqttQoSMap) {
+        super(mqttQoSMap);
         this.parent = parent;
-        this.sessionId = new MqttSessionId();
+        this.sessionId = UUID.randomUUID();
+        this.sessionInfo = SessionInfoProto.newBuilder()
+                .setNodeId(parent.getNodeId())
+                .setSessionIdMSB(sessionId.getMostSignificantBits())
+                .setSessionIdLSB(sessionId.getLeastSignificantBits())
+                .setDeviceIdMSB(deviceInfo.getDeviceIdMSB())
+                .setDeviceIdLSB(deviceInfo.getDeviceIdLSB())
+                .setTenantIdMSB(deviceInfo.getTenantIdMSB())
+                .setTenantIdLSB(deviceInfo.getTenantIdLSB())
+                .build();
+        setDeviceInfo(deviceInfo);
     }
 
     @Override
-    public SessionId getSessionId() {
+    public UUID getSessionId() {
         return sessionId;
     }
 
-    @Override
-    public SessionType getSessionType() {
-        return SessionType.ASYNC;
-    }
-
-    @Override
-    public void onMsg(SessionActorToAdaptorMsg sessionMsg) throws SessionException {
-        Optional<MqttMessage> message = getToDeviceMsg(sessionMsg);
-        message.ifPresent(parent::writeAndFlush);
-    }
-
     private Optional<MqttMessage> getToDeviceMsg(SessionActorToAdaptorMsg sessionMsg) {
         ToDeviceMsg msg = sessionMsg.getMsg();
         switch (msg.getSessionMsgType()) {
@@ -113,25 +123,6 @@ public class GatewayDeviceSessionCtx extends MqttDeviceAwareSessionContext {
         return Optional.empty();
     }
 
-    @Override
-    public void onMsg(SessionCtrlMsg msg) throws SessionException {
-        //Do nothing
-    }
-
-    @Override
-    public boolean isClosed() {
-        return closed;
-    }
-
-    public void setClosed(boolean closed) {
-        this.closed = closed;
-    }
-
-    @Override
-    public long getTimeout() {
-        return 0;
-    }
-
     private MqttMessage createMqttPublishMsg(String topic, GetAttributesResponse response) {
         JsonObject result = new JsonObject();
         result.addProperty("id", response.getRequestId());
@@ -204,4 +195,40 @@ public class GatewayDeviceSessionCtx extends MqttDeviceAwareSessionContext {
         return new MqttPublishMessage(mqttFixedHeader, header, payload);
     }
 
+    SessionInfoProto getSessionInfo() {
+        return sessionInfo;
+    }
+
+    @Override
+    public void onGetAttributesResponse(TransportProtos.GetAttributeResponseMsg response) {
+        try {
+            parent.getAdaptor().convertToGatewayPublish(this, response).ifPresent(parent::writeAndFlush);
+        } catch (Exception e) {
+            log.trace("[{}] Failed to convert device attributes response to MQTT msg", sessionId, e);
+        }
+    }
+
+    @Override
+    public void onAttributeUpdate(TransportProtos.AttributeUpdateNotificationMsg notification) {
+        try {
+            parent.getAdaptor().convertToGatewayPublish(this, getDeviceInfo().getDeviceName(), notification).ifPresent(parent::writeAndFlush);
+        } catch (Exception e) {
+            log.trace("[{}] Failed to convert device attributes response to MQTT msg", sessionId, e);
+        }
+    }
+
+    @Override
+    public void onRemoteSessionCloseCommand(TransportProtos.SessionCloseNotificationProto sessionCloseNotification) {
+        parent.deregisterSession(getDeviceInfo().getDeviceName());
+    }
+
+    @Override
+    public void onToDeviceRpcRequest(TransportProtos.ToDeviceRpcRequestMsg toDeviceRequest) {
+
+    }
+
+    @Override
+    public void onToServerRpcResponse(TransportProtos.ToServerRpcResponseMsg toServerResponse) {
+        TODO
+    }
 }
diff --git a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/GatewaySessionCtx.java b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/GatewaySessionCtx.java
index fafbc4e..3788d57 100644
--- a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/GatewaySessionCtx.java
+++ b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/GatewaySessionCtx.java
@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2018 The Thingsboard Authors
- *
+ * <p>
  * Licensed 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
- *
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
  * 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.
@@ -15,6 +15,11 @@
  */
 package org.thingsboard.server.transport.mqtt.session;
 
+
+import com.google.common.util.concurrent.FutureCallback;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+import com.google.common.util.concurrent.SettableFuture;
 import com.google.gson.JsonArray;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonNull;
@@ -25,28 +30,28 @@ import io.netty.handler.codec.mqtt.MqttMessage;
 import io.netty.handler.codec.mqtt.MqttPublishMessage;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.util.StringUtils;
-import org.thingsboard.server.common.data.Device;
-import org.thingsboard.server.common.data.id.SessionId;
-import org.thingsboard.server.common.data.kv.BaseAttributeKvEntry;
-import org.thingsboard.server.common.data.relation.EntityRelation;
-import org.thingsboard.server.common.msg.core.*;
-import org.thingsboard.server.common.msg.session.BasicAdaptorToSessionActorMsg;
-import org.thingsboard.server.common.msg.session.BasicTransportToDeviceSessionActorMsg;
-import org.thingsboard.server.common.msg.session.ctrl.SessionCloseMsg;
-import org.thingsboard.server.common.transport.SessionMsgProcessor;
+import org.thingsboard.server.common.transport.TransportService;
+import org.thingsboard.server.common.transport.TransportServiceCallback;
 import org.thingsboard.server.common.transport.adaptor.AdaptorException;
 import org.thingsboard.server.common.transport.adaptor.JsonConverter;
-import org.thingsboard.server.common.transport.auth.DeviceAuthService;
-import org.thingsboard.server.dao.device.DeviceService;
-import org.thingsboard.server.dao.relation.RelationService;
+import org.thingsboard.server.gen.transport.TransportProtos;
+import org.thingsboard.server.gen.transport.TransportProtos.DeviceInfoProto;
+import org.thingsboard.server.gen.transport.TransportProtos.GetOrCreateDeviceFromGatewayRequestMsg;
+import org.thingsboard.server.gen.transport.TransportProtos.GetOrCreateDeviceFromGatewayResponseMsg;
+import org.thingsboard.server.gen.transport.TransportProtos.SessionInfoProto;
+import org.thingsboard.server.transport.mqtt.MqttTransportContext;
 import org.thingsboard.server.transport.mqtt.MqttTransportHandler;
 import org.thingsboard.server.transport.mqtt.adaptors.JsonMqttAdaptor;
+import org.thingsboard.server.transport.mqtt.adaptors.MqttTransportAdaptor;
 
-import java.util.*;
+import javax.annotation.Nullable;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
-import java.util.stream.Collectors;
-
-import static org.thingsboard.server.transport.mqtt.adaptors.JsonMqttAdaptor.validateJsonPayload;
 
 /**
  * Created by ashvayka on 19.01.17.
@@ -55,184 +60,235 @@ import static org.thingsboard.server.transport.mqtt.adaptors.JsonMqttAdaptor.val
 public class GatewaySessionCtx {
 
     private static final String DEFAULT_DEVICE_TYPE = "default";
-    public static final String CAN_T_PARSE_VALUE = "Can't parse value: ";
-    public static final String DEVICE_PROPERTY = "device";
-//    private final Device gateway;
-//    private final SessionId gatewaySessionId;
-//    private final SessionMsgProcessor processor;
-//    private final DeviceService deviceService;
-//    private final DeviceAuthService authService;
-//    private final RelationService relationService;
-//    private final Map<String, GatewayDeviceSessionCtx> devices;
-//    private final ConcurrentMap<String, Integer> mqttQoSMap;
-    private ChannelHandlerContext channel;
-
-//    public GatewaySessionCtx(SessionMsgProcessor processor, DeviceService deviceService, DeviceAuthService authService, RelationService relationService, DeviceSessionCtx gatewaySessionCtx) {
-//        this.processor = processor;
-//        this.deviceService = deviceService;
-//        this.authService = authService;
-//        this.relationService = relationService;
-//        this.gateway = gatewaySessionCtx.getDevice();
-//        this.gatewaySessionId = gatewaySessionCtx.getSessionId();
-//        this.devices = new HashMap<>();
-//        this.mqttQoSMap = gatewaySessionCtx.getMqttQoSMap();
-//    }
-
-    public GatewaySessionCtx(DeviceSessionCtx deviceSessionCtx) {
+    private static final String CAN_T_PARSE_VALUE = "Can't parse value: ";
+    private static final String DEVICE_PROPERTY = "device";
+
+    private final MqttTransportContext context;
+    private final TransportService transportService;
+    private final DeviceInfoProto gateway;
+    private final UUID sessionId;
+    private final Map<String, GatewayDeviceSessionCtx> devices;
+    private final ConcurrentMap<String, Integer> mqttQoSMap;
+    private final ChannelHandlerContext channel;
 
+    public GatewaySessionCtx(MqttTransportContext context, DeviceSessionCtx deviceSessionCtx, UUID sessionId) {
+        this.context = context;
+        this.transportService = context.getTransportService();
+        this.gateway = deviceSessionCtx.getDeviceInfo();
+        this.sessionId = sessionId;
+        this.devices = new ConcurrentHashMap<>();
+        this.mqttQoSMap = deviceSessionCtx.getMqttQoSMap();
+        this.channel = deviceSessionCtx.getChannel();
     }
 
     public void onDeviceConnect(MqttPublishMessage msg) throws AdaptorException {
         JsonElement json = getJson(msg);
         String deviceName = checkDeviceName(getDeviceName(json));
         String deviceType = getDeviceType(json);
-        onDeviceConnect(deviceName, deviceType);
-        ack(msg);
+        Futures.addCallback(onDeviceConnect(deviceName, deviceType), new FutureCallback<GatewayDeviceSessionCtx>() {
+            @Override
+            public void onSuccess(@Nullable GatewayDeviceSessionCtx result) {
+                ack(msg);
+            }
+
+            @Override
+            public void onFailure(Throwable t) {
+                log.warn("[{}] Failed to process device connect command: {}", sessionId, deviceName, t);
+
+            }
+        }, context.getExecutor());
     }
 
-    private void onDeviceConnect(String deviceName, String deviceType) {
-//        if (!devices.containsKey(deviceName)) {
-//            Device device = deviceService.findDeviceByTenantIdAndName(gateway.getTenantId(), deviceName);
-//            if (device == null) {
-//                device = new Device();
-//                device.setTenantId(gateway.getTenantId());
-//                device.setName(deviceName);
-//                device.setType(deviceType);
-//                device.setCustomerId(gateway.getCustomerId());
-//                device = deviceService.saveDevice(device);
-//                relationService.saveRelationAsync(new EntityRelation(gateway.getId(), device.getId(), "Created"));
-//                processor.onDeviceAdded(device);
-//            }
-//            GatewayDeviceSessionCtx ctx = new GatewayDeviceSessionCtx(this, device, mqttQoSMap);
-//            devices.put(deviceName, ctx);
-//            log.debug("[{}] Added device [{}] to the gateway session", gatewaySessionId, deviceName);
-//            processor.process(new BasicTransportToDeviceSessionActorMsg(device, new BasicAdaptorToSessionActorMsg(ctx, new AttributesSubscribeMsg())));
-//            processor.process(new BasicTransportToDeviceSessionActorMsg(device, new BasicAdaptorToSessionActorMsg(ctx, new RpcSubscribeMsg())));
-//        }
+    private ListenableFuture<GatewayDeviceSessionCtx> onDeviceConnect(String deviceName, String deviceType) {
+        SettableFuture<GatewayDeviceSessionCtx> future = SettableFuture.create();
+        GatewayDeviceSessionCtx result = devices.get(deviceName);
+        if (result == null) {
+            transportService.process(GetOrCreateDeviceFromGatewayRequestMsg.newBuilder()
+                            .setDeviceName(deviceName)
+                            .setDeviceType(deviceType)
+                            .setGatewayIdMSB(gateway.getDeviceIdMSB())
+                            .setGatewayIdLSB(gateway.getDeviceIdLSB()).build(),
+                    new TransportServiceCallback<GetOrCreateDeviceFromGatewayResponseMsg>() {
+                        @Override
+                        public void onSuccess(GetOrCreateDeviceFromGatewayResponseMsg msg) {
+                            GatewayDeviceSessionCtx deviceSessionCtx = new GatewayDeviceSessionCtx(GatewaySessionCtx.this, msg.getDeviceInfo(), mqttQoSMap);
+                            if (devices.putIfAbsent(deviceName, deviceSessionCtx) == null) {
+                                SessionInfoProto deviceSessionInfo = deviceSessionCtx.getSessionInfo();
+                                transportService.process(deviceSessionInfo, MqttTransportHandler.getSessionEventMsg(TransportProtos.SessionEvent.OPEN), null);
+                                transportService.registerSession(deviceSessionInfo, deviceSessionCtx);
+                            }
+                            future.set(devices.get(deviceName));
+                        }
+
+                        @Override
+                        public void onError(Throwable e) {
+                            log.warn("[{}] Failed to process device connect command: {}", sessionId, deviceName, e);
+                            future.setException(e);
+                        }
+                    });
+        } else {
+            future.set(result);
+        }
+        return future;
     }
 
     public void onDeviceDisconnect(MqttPublishMessage msg) throws AdaptorException {
-//        String deviceName = checkDeviceName(getDeviceName(getJson(msg)));
-//        GatewayDeviceSessionCtx deviceSessionCtx = devices.remove(deviceName);
-//        if (deviceSessionCtx != null) {
-//            processor.process(SessionCloseMsg.onDisconnect(deviceSessionCtx.getSessionId()));
-//            deviceSessionCtx.setClosed(true);
-//            log.debug("[{}] Removed device [{}] from the gateway session", gatewaySessionId, deviceName);
-//        } else {
-//            log.debug("[{}] Device [{}] was already removed from the gateway session", gatewaySessionId, deviceName);
-//        }
-//        ack(msg);
+        String deviceName = checkDeviceName(getDeviceName(getJson(msg)));
+        deregisterSession(deviceName);
+        ack(msg);
+    }
+
+    void deregisterSession(String deviceName) {
+        GatewayDeviceSessionCtx deviceSessionCtx = devices.remove(deviceName);
+        if (deviceSessionCtx != null) {
+            deregisterSession(deviceName, deviceSessionCtx);
+        } else {
+            log.debug("[{}] Device [{}] was already removed from the gateway session", sessionId, deviceName);
+        }
     }
 
     public void onGatewayDisconnect() {
-//        devices.forEach((k, v) -> {
-//            processor.process(SessionCloseMsg.onDisconnect(v.getSessionId()));
-//        });
+        devices.forEach(this::deregisterSession);
     }
 
     public void onDeviceTelemetry(MqttPublishMessage mqttMsg) throws AdaptorException {
-//        JsonElement json = validateJsonPayload(gatewaySessionId, mqttMsg.payload());
-//        int requestId = mqttMsg.variableHeader().messageId();
-//        if (json.isJsonObject()) {
-//            JsonObject jsonObj = json.getAsJsonObject();
-//            for (Map.Entry<String, JsonElement> deviceEntry : jsonObj.entrySet()) {
-//                String deviceName = checkDeviceConnected(deviceEntry.getKey());
-//                if (!deviceEntry.getValue().isJsonArray()) {
-//                    throw new JsonSyntaxException(CAN_T_PARSE_VALUE + json);
-//                }
-//                BasicTelemetryUploadRequest request = new BasicTelemetryUploadRequest(requestId);
-//                JsonArray deviceData = deviceEntry.getValue().getAsJsonArray();
-//                for (JsonElement element : deviceData) {
-//                    JsonConverter.parseWithTs(request, element.getAsJsonObject());
-//                }
-//                GatewayDeviceSessionCtx deviceSessionCtx = devices.get(deviceName);
-//                processor.process(new BasicTransportToDeviceSessionActorMsg(deviceSessionCtx.getDevice(),
-//                        new BasicAdaptorToSessionActorMsg(deviceSessionCtx, request)));
-//            }
-//        } else {
-//            throw new JsonSyntaxException(CAN_T_PARSE_VALUE + json);
-//        }
-    }
+        JsonElement json = JsonMqttAdaptor.validateJsonPayload(sessionId, mqttMsg.payload());
+        int msgId = mqttMsg.variableHeader().packetId();
+        if (json.isJsonObject()) {
+            JsonObject jsonObj = json.getAsJsonObject();
+            for (Map.Entry<String, JsonElement> deviceEntry : jsonObj.entrySet()) {
+                String deviceName = deviceEntry.getKey();
+                Futures.addCallback(checkDeviceConnected(deviceName),
+                        new FutureCallback<GatewayDeviceSessionCtx>() {
+                            @Override
+                            public void onSuccess(@Nullable GatewayDeviceSessionCtx deviceCtx) {
+                                if (!deviceEntry.getValue().isJsonArray()) {
+                                    throw new JsonSyntaxException(CAN_T_PARSE_VALUE + json);
+                                }
+                                TransportProtos.PostTelemetryMsg postTelemetryMsg = JsonConverter.convertToTelemetryProto(deviceEntry.getValue().getAsJsonArray());
+                                transportService.process(deviceCtx.getSessionInfo(), postTelemetryMsg, getPubAckCallback(channel, deviceName, msgId, postTelemetryMsg));
+                            }
 
-    public void onDeviceRpcResponse(MqttPublishMessage mqttMsg) throws AdaptorException {
-//        JsonElement json = validateJsonPayload(gatewaySessionId, mqttMsg.payload());
-//        if (json.isJsonObject()) {
-//            JsonObject jsonObj = json.getAsJsonObject();
-//            String deviceName = checkDeviceConnected(jsonObj.get(DEVICE_PROPERTY).getAsString());
-//            Integer requestId = jsonObj.get("id").getAsInt();
-//            String data = jsonObj.get("data").toString();
-//            GatewayDeviceSessionCtx deviceSessionCtx = devices.get(deviceName);
-//            processor.process(new BasicTransportToDeviceSessionActorMsg(deviceSessionCtx.getDevice(),
-//                    new BasicAdaptorToSessionActorMsg(deviceSessionCtx, new ToDeviceRpcResponseMsg(requestId, data))));
-//            ack(mqttMsg);
-//        } else {
-//            throw new JsonSyntaxException(CAN_T_PARSE_VALUE + json);
-//        }
+                            @Override
+                            public void onFailure(Throwable t) {
+                                log.debug("[{}] Failed to process device teleemtry command: {}", sessionId, deviceName, t);
+                            }
+                        }, context.getExecutor());
+            }
+        } else {
+            throw new JsonSyntaxException(CAN_T_PARSE_VALUE + json);
+        }
     }
 
     public void onDeviceAttributes(MqttPublishMessage mqttMsg) throws AdaptorException {
-//        JsonElement json = validateJsonPayload(gatewaySessionId, mqttMsg.payload());
-//        int requestId = mqttMsg.variableHeader().messageId();
-//        if (json.isJsonObject()) {
-//            JsonObject jsonObj = json.getAsJsonObject();
-//            for (Map.Entry<String, JsonElement> deviceEntry : jsonObj.entrySet()) {
-//                String deviceName = checkDeviceConnected(deviceEntry.getKey());
-//                if (!deviceEntry.getValue().isJsonObject()) {
-//                    throw new JsonSyntaxException(CAN_T_PARSE_VALUE + json);
-//                }
-//                long ts = System.currentTimeMillis();
-//                BasicAttributesUpdateRequest request = new BasicAttributesUpdateRequest(requestId);
-//                JsonObject deviceData = deviceEntry.getValue().getAsJsonObject();
-//                request.add(JsonConverter.parseValues(deviceData).stream().map(kv -> new BaseAttributeKvEntry(kv, ts)).collect(Collectors.toList()));
-//                GatewayDeviceSessionCtx deviceSessionCtx = devices.get(deviceName);
-//                processor.process(new BasicTransportToDeviceSessionActorMsg(deviceSessionCtx.getDevice(),
-//                        new BasicAdaptorToSessionActorMsg(deviceSessionCtx, request)));
-//            }
-//        } else {
-//            throw new JsonSyntaxException(CAN_T_PARSE_VALUE + json);
-//        }
+        JsonElement json = JsonMqttAdaptor.validateJsonPayload(sessionId, mqttMsg.payload());
+        int msgId = mqttMsg.variableHeader().packetId();
+        if (json.isJsonObject()) {
+            JsonObject jsonObj = json.getAsJsonObject();
+            for (Map.Entry<String, JsonElement> deviceEntry : jsonObj.entrySet()) {
+                String deviceName = deviceEntry.getKey();
+                Futures.addCallback(checkDeviceConnected(deviceName),
+                        new FutureCallback<GatewayDeviceSessionCtx>() {
+                            @Override
+                            public void onSuccess(@Nullable GatewayDeviceSessionCtx deviceCtx) {
+                                if (!deviceEntry.getValue().isJsonObject()) {
+                                    throw new JsonSyntaxException(CAN_T_PARSE_VALUE + json);
+                                }
+                                TransportProtos.PostAttributeMsg postAttributeMsg = JsonConverter.convertToAttributesProto(deviceEntry.getValue().getAsJsonObject());
+                                transportService.process(deviceCtx.getSessionInfo(), postAttributeMsg, getPubAckCallback(channel, deviceName, msgId, postAttributeMsg));
+                            }
+
+                            @Override
+                            public void onFailure(Throwable t) {
+                                log.debug("[{}] Failed to process device teleemtry command: {}", sessionId, deviceName, t);
+                            }
+                        }, context.getExecutor());
+            }
+        } else {
+            throw new JsonSyntaxException(CAN_T_PARSE_VALUE + json);
+        }
+    }
+
+    public void onDeviceRpcResponse(MqttPublishMessage mqttMsg) throws AdaptorException {
+        JsonElement json = JsonMqttAdaptor.validateJsonPayload(sessionId, mqttMsg.payload());
+        int msgId = mqttMsg.variableHeader().packetId();
+        if (json.isJsonObject()) {
+            JsonObject jsonObj = json.getAsJsonObject();
+            String deviceName = jsonObj.get(DEVICE_PROPERTY).getAsString();
+            Futures.addCallback(checkDeviceConnected(deviceName),
+                    new FutureCallback<GatewayDeviceSessionCtx>() {
+                        @Override
+                        public void onSuccess(@Nullable GatewayDeviceSessionCtx deviceCtx) {
+                            Integer requestId = jsonObj.get("id").getAsInt();
+                            String data = jsonObj.get("data").toString();
+                            TransportProtos.ToDeviceRpcResponseMsg rpcResponseMsg = TransportProtos.ToDeviceRpcResponseMsg.newBuilder()
+                                    .setRequestId(requestId).setPayload(data).build();
+                            transportService.process(deviceCtx.getSessionInfo(), rpcResponseMsg, getPubAckCallback(channel, deviceName, msgId, rpcResponseMsg));
+                        }
+
+                        @Override
+                        public void onFailure(Throwable t) {
+                            log.debug("[{}] Failed to process device teleemtry command: {}", sessionId, deviceName, t);
+                        }
+                    }, context.getExecutor());
+        } else {
+            throw new JsonSyntaxException(CAN_T_PARSE_VALUE + json);
+        }
     }
 
     public void onDeviceAttributesRequest(MqttPublishMessage msg) throws AdaptorException {
-//        JsonElement json = validateJsonPayload(gatewaySessionId, msg.payload());
-//        if (json.isJsonObject()) {
-//            JsonObject jsonObj = json.getAsJsonObject();
-//            int requestId = jsonObj.get("id").getAsInt();
-//            String deviceName = jsonObj.get(DEVICE_PROPERTY).getAsString();
-//            boolean clientScope = jsonObj.get("client").getAsBoolean();
-//            Set<String> keys;
-//            if (jsonObj.has("key")) {
-//                keys = Collections.singleton(jsonObj.get("key").getAsString());
-//            } else {
-//                JsonArray keysArray = jsonObj.get("keys").getAsJsonArray();
-//                keys = new HashSet<>();
-//                for (JsonElement keyObj : keysArray) {
-//                    keys.add(keyObj.getAsString());
-//                }
-//            }
-//
-//            BasicGetAttributesRequest request;
-//            if (clientScope) {
-//                request = new BasicGetAttributesRequest(requestId, keys, null);
-//            } else {
-//                request = new BasicGetAttributesRequest(requestId, null, keys);
-//            }
-//            GatewayDeviceSessionCtx deviceSessionCtx = devices.get(deviceName);
-//            processor.process(new BasicTransportToDeviceSessionActorMsg(deviceSessionCtx.getDevice(),
-//                    new BasicAdaptorToSessionActorMsg(deviceSessionCtx, request)));
-//            ack(msg);
-//        } else {
-//            throw new JsonSyntaxException(CAN_T_PARSE_VALUE + json);
-//        }
+        JsonElement json = JsonMqttAdaptor.validateJsonPayload(sessionId, msg.payload());
+        if (json.isJsonObject()) {
+            JsonObject jsonObj = json.getAsJsonObject();
+            int requestId = jsonObj.get("id").getAsInt();
+            String deviceName = jsonObj.get(DEVICE_PROPERTY).getAsString();
+            boolean clientScope = jsonObj.get("client").getAsBoolean();
+            Set<String> keys;
+            if (jsonObj.has("key")) {
+                keys = Collections.singleton(jsonObj.get("key").getAsString());
+            } else {
+                JsonArray keysArray = jsonObj.get("keys").getAsJsonArray();
+                keys = new HashSet<>();
+                for (JsonElement keyObj : keysArray) {
+                    keys.add(keyObj.getAsString());
+                }
+            }
+            TransportProtos.GetAttributeRequestMsg.Builder result = TransportProtos.GetAttributeRequestMsg.newBuilder();
+            result.setRequestId(requestId);
+
+            if (clientScope) {
+                result.addAllClientAttributeNames(keys);
+            } else {
+                result.addAllSharedAttributeNames(keys);
+            }
+            int msgId = msg.variableHeader().packetId();
+            TransportProtos.GetAttributeRequestMsg requestMsg = result.build();
+            Futures.addCallback(checkDeviceConnected(deviceName),
+                    new FutureCallback<GatewayDeviceSessionCtx>() {
+                        @Override
+                        public void onSuccess(@Nullable GatewayDeviceSessionCtx deviceCtx) {
+                            transportService.process(deviceCtx.getSessionInfo(), requestMsg, getPubAckCallback(channel, deviceName, msgId, requestMsg));
+                        }
+
+                        @Override
+                        public void onFailure(Throwable t) {
+                            log.debug("[{}] Failed to process device teleemtry command: {}", sessionId, deviceName, t);
+                        }
+                    }, context.getExecutor());
+            ack(msg);
+        } else {
+            throw new JsonSyntaxException(CAN_T_PARSE_VALUE + json);
+        }
     }
 
-    private String checkDeviceConnected(String deviceName) {
-//        if (!devices.containsKey(deviceName)) {
-//            log.debug("[{}] Missing device [{}] for the gateway session", gatewaySessionId, deviceName);
-//            onDeviceConnect(deviceName, DEFAULT_DEVICE_TYPE);
-//        }
-//        return deviceName;
-        return null;
+    private ListenableFuture<GatewayDeviceSessionCtx> checkDeviceConnected(String deviceName) {
+        GatewayDeviceSessionCtx ctx = devices.get(deviceName);
+        if (ctx == null) {
+            log.debug("[{}] Missing device [{}] for the gateway session", sessionId, deviceName);
+            return onDeviceConnect(deviceName, DEFAULT_DEVICE_TYPE);
+        } else {
+            return Futures.immediateFuture(ctx);
+        }
     }
 
     private String checkDeviceName(String deviceName) {
@@ -253,32 +309,52 @@ public class GatewaySessionCtx {
     }
 
     private JsonElement getJson(MqttPublishMessage mqttMsg) throws AdaptorException {
-//        return JsonMqttAdaptor.validateJsonPayload(gatewaySessionId, mqttMsg.payload());
-        return null;
+        return JsonMqttAdaptor.validateJsonPayload(sessionId, mqttMsg.payload());
+    }
+
+    private void ack(MqttPublishMessage msg) {
+        if (msg.variableHeader().packetId() > 0) {
+            writeAndFlush(MqttTransportHandler.createMqttPubAckMsg(msg.variableHeader().packetId()));
+        }
     }
 
-    protected SessionMsgProcessor getProcessor() {
-//        return processor;
-        return null;
+    void writeAndFlush(MqttMessage mqttMessage) {
+        channel.writeAndFlush(mqttMessage);
     }
 
-    DeviceAuthService getAuthService() {
-//        return authService;
-        return null;
+    public String getNodeId() {
+        return context.getNodeId();
     }
 
-    public void setChannel(ChannelHandlerContext channel) {
-        this.channel = channel;
+    private void deregisterSession(String deviceName, GatewayDeviceSessionCtx deviceSessionCtx) {
+        transportService.deregisterSession(deviceSessionCtx.getSessionInfo());
+        transportService.process(deviceSessionCtx.getSessionInfo(), MqttTransportHandler.getSessionEventMsg(TransportProtos.SessionEvent.CLOSED), null);
+        log.debug("[{}] Removed device [{}] from the gateway session", sessionId, deviceName);
     }
 
-    private void ack(MqttPublishMessage msg) {
-        if (msg.variableHeader().messageId() > 0) {
-            writeAndFlush(MqttTransportHandler.createMqttPubAckMsg(msg.variableHeader().messageId()));
-        }
+    private <T> TransportServiceCallback<Void> getPubAckCallback(final ChannelHandlerContext ctx, final String deviceName, final int msgId, final T msg) {
+        return new TransportServiceCallback<Void>() {
+            @Override
+            public void onSuccess(Void dummy) {
+                log.trace("[{}][{}] Published msg: {}", sessionId, deviceName, msg);
+                if (msgId > 0) {
+                    ctx.writeAndFlush(MqttTransportHandler.createMqttPubAckMsg(msgId));
+                }
+            }
+
+            @Override
+            public void onError(Throwable e) {
+                log.trace("[{}] Failed to publish msg: {}", sessionId, deviceName, msg, e);
+                ctx.close();
+            }
+        };
     }
 
-    void writeAndFlush(MqttMessage mqttMessage) {
-        channel.writeAndFlush(mqttMessage);
+    public MqttTransportContext getContext() {
+        return context;
     }
 
+    public MqttTransportAdaptor getAdaptor() {
+        return context.getAdaptor();
+    }
 }
diff --git a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/MqttDeviceAwareSessionContext.java b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/MqttDeviceAwareSessionContext.java
index c01e103..9e66566 100644
--- a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/MqttDeviceAwareSessionContext.java
+++ b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/MqttDeviceAwareSessionContext.java
@@ -31,12 +31,7 @@ public abstract class MqttDeviceAwareSessionContext extends DeviceAwareSessionCo
 
     private final ConcurrentMap<String, Integer> mqttQoSMap;
 
-    public MqttDeviceAwareSessionContext(SessionMsgProcessor processor, DeviceAuthService authService, ConcurrentMap<String, Integer> mqttQoSMap) {
-        super();
-        this.mqttQoSMap = mqttQoSMap;
-    }
-
-    public MqttDeviceAwareSessionContext(SessionMsgProcessor processor, DeviceAuthService authService, Device device, ConcurrentMap<String, Integer> mqttQoSMap) {
+    public MqttDeviceAwareSessionContext(ConcurrentMap<String, Integer> mqttQoSMap) {
         super();
         this.mqttQoSMap = mqttQoSMap;
     }
diff --git a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/MqttSessionId.java b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/MqttSessionId.java
index 0300612..9256e5d 100644
--- a/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/MqttSessionId.java
+++ b/transport/mqtt-common/src/main/java/org/thingsboard/server/transport/mqtt/session/MqttSessionId.java
@@ -15,9 +15,6 @@
  */
 package org.thingsboard.server.transport.mqtt.session;
 
-import org.thingsboard.server.common.data.id.SessionId;
-
-import java.util.UUID;
 import java.util.concurrent.atomic.AtomicLong;
 
 /**
diff --git a/transport/mqtt-transport/src/main/java/org/thingsboard/server/mqtt/service/MqttTransportService.java b/transport/mqtt-transport/src/main/java/org/thingsboard/server/mqtt/service/MqttTransportService.java
index 1539238..bfc69ef 100644
--- a/transport/mqtt-transport/src/main/java/org/thingsboard/server/mqtt/service/MqttTransportService.java
+++ b/transport/mqtt-transport/src/main/java/org/thingsboard/server/mqtt/service/MqttTransportService.java
@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2018 The Thingsboard Authors
- *
+ * <p>
  * Licensed 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
- *
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
  * 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.
@@ -25,7 +25,9 @@ import org.springframework.stereotype.Service;
 import org.thingsboard.server.common.transport.SessionMsgListener;
 import org.thingsboard.server.common.transport.TransportService;
 import org.thingsboard.server.common.transport.TransportServiceCallback;
-import org.thingsboard.server.gen.transport.TransportProtos;
+import org.thingsboard.server.gen.transport.TransportProtos.*;
+import org.thingsboard.server.gen.transport.TransportProtos.GetOrCreateDeviceFromGatewayRequestMsg;
+import org.thingsboard.server.gen.transport.TransportProtos.GetOrCreateDeviceFromGatewayResponseMsg;
 import org.thingsboard.server.gen.transport.TransportProtos.PostAttributeMsg;
 import org.thingsboard.server.gen.transport.TransportProtos.PostTelemetryMsg;
 import org.thingsboard.server.gen.transport.TransportProtos.SessionEventMsg;
@@ -153,7 +155,7 @@ public class MqttTransportService implements TransportService {
                         try {
                             ToTransportMsg toTransportMsg = mainConsumer.decode(record);
                             if (toTransportMsg.hasToDeviceSessionMsg()) {
-                                TransportProtos.DeviceActorToTransportMsg toSessionMsg = toTransportMsg.getToDeviceSessionMsg();
+                                DeviceActorToTransportMsg toSessionMsg = toTransportMsg.getToDeviceSessionMsg();
                                 UUID sessionId = new UUID(toSessionMsg.getSessionIdMSB(), toSessionMsg.getSessionIdLSB());
                                 SessionMsgListener listener = sessions.get(sessionId);
                                 if (listener != null) {
@@ -228,9 +230,16 @@ public class MqttTransportService implements TransportService {
     }
 
     @Override
+    public void process(GetOrCreateDeviceFromGatewayRequestMsg msg, TransportServiceCallback<GetOrCreateDeviceFromGatewayResponseMsg> callback) {
+        AsyncCallbackTemplate.withCallback(transportApiTemplate.post(msg.getTenantIdMSB() + msg.getTenantIdLSB() + msg.getDeviceName(),
+                TransportApiRequestMsg.newBuilder().setGetOrCreateDeviceRequestMsg(msg).build()),
+                response -> callback.onSuccess(response.getGetOrCreateDeviceResponseMsg()), callback::onError, transportCallbackExecutor);
+    }
+
+    @Override
     public void process(SessionInfoProto sessionInfo, SessionEventMsg msg, TransportServiceCallback<Void> callback) {
         ToRuleEngineMsg toRuleEngineMsg = ToRuleEngineMsg.newBuilder().setToDeviceActorMsg(
-                TransportProtos.TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
+                TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
                         .setSessionEvent(msg).build()
         ).build();
         send(sessionInfo, toRuleEngineMsg, callback);
@@ -239,7 +248,7 @@ public class MqttTransportService implements TransportService {
     @Override
     public void process(SessionInfoProto sessionInfo, PostTelemetryMsg msg, TransportServiceCallback<Void> callback) {
         ToRuleEngineMsg toRuleEngineMsg = ToRuleEngineMsg.newBuilder().setToDeviceActorMsg(
-                TransportProtos.TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
+                TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
                         .setPostTelemetry(msg).build()
         ).build();
         send(sessionInfo, toRuleEngineMsg, callback);
@@ -248,52 +257,52 @@ public class MqttTransportService implements TransportService {
     @Override
     public void process(SessionInfoProto sessionInfo, PostAttributeMsg msg, TransportServiceCallback<Void> callback) {
         ToRuleEngineMsg toRuleEngineMsg = ToRuleEngineMsg.newBuilder().setToDeviceActorMsg(
-                TransportProtos.TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
+                TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
                         .setPostAttributes(msg).build()
         ).build();
         send(sessionInfo, toRuleEngineMsg, callback);
     }
 
     @Override
-    public void process(SessionInfoProto sessionInfo, TransportProtos.GetAttributeRequestMsg msg, TransportServiceCallback<Void> callback) {
+    public void process(SessionInfoProto sessionInfo, GetAttributeRequestMsg msg, TransportServiceCallback<Void> callback) {
         ToRuleEngineMsg toRuleEngineMsg = ToRuleEngineMsg.newBuilder().setToDeviceActorMsg(
-                TransportProtos.TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
+                TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
                         .setGetAttributes(msg).build()
         ).build();
         send(sessionInfo, toRuleEngineMsg, callback);
     }
 
     @Override
-    public void process(SessionInfoProto sessionInfo, TransportProtos.SubscribeToAttributeUpdatesMsg msg, TransportServiceCallback<Void> callback) {
+    public void process(SessionInfoProto sessionInfo, SubscribeToAttributeUpdatesMsg msg, TransportServiceCallback<Void> callback) {
         ToRuleEngineMsg toRuleEngineMsg = ToRuleEngineMsg.newBuilder().setToDeviceActorMsg(
-                TransportProtos.TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
+                TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
                         .setSubscribeToAttributes(msg).build()
         ).build();
         send(sessionInfo, toRuleEngineMsg, callback);
     }
 
     @Override
-    public void process(SessionInfoProto sessionInfo, TransportProtos.SubscribeToRPCMsg msg, TransportServiceCallback<Void> callback) {
+    public void process(SessionInfoProto sessionInfo, SubscribeToRPCMsg msg, TransportServiceCallback<Void> callback) {
         ToRuleEngineMsg toRuleEngineMsg = ToRuleEngineMsg.newBuilder().setToDeviceActorMsg(
-                TransportProtos.TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
+                TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
                         .setSubscribeToRPC(msg).build()
         ).build();
         send(sessionInfo, toRuleEngineMsg, callback);
     }
 
     @Override
-    public void process(SessionInfoProto sessionInfo, TransportProtos.ToDeviceRpcResponseMsg msg, TransportServiceCallback<Void> callback) {
+    public void process(SessionInfoProto sessionInfo, ToDeviceRpcResponseMsg msg, TransportServiceCallback<Void> callback) {
         ToRuleEngineMsg toRuleEngineMsg = ToRuleEngineMsg.newBuilder().setToDeviceActorMsg(
-                TransportProtos.TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
+                TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
                         .setToDeviceRPCCallResponse(msg).build()
         ).build();
         send(sessionInfo, toRuleEngineMsg, callback);
     }
 
     @Override
-    public void process(SessionInfoProto sessionInfo, TransportProtos.ToServerRpcRequestMsg msg, TransportServiceCallback<Void> callback) {
+    public void process(SessionInfoProto sessionInfo, ToServerRpcRequestMsg msg, TransportServiceCallback<Void> callback) {
         ToRuleEngineMsg toRuleEngineMsg = ToRuleEngineMsg.newBuilder().setToDeviceActorMsg(
-                TransportProtos.TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
+                TransportToDeviceActorMsg.newBuilder().setSessionInfo(sessionInfo)
                         .setToServerRPCCallRequest(msg).build()
         ).build();
         send(sessionInfo, toRuleEngineMsg, callback);