TB-41: Implementation

common/message/src/main/java/org/thingsboard/server/common/msg/core/BasicGetAttributesRequest.java

@@ -47,7 +47,7 @@ public class BasicGetAttributesRequest extends BasicRequest implements GetAttrib
 
     @Override
     public Optional<Set<String>> getClientAttributeNames() {
-        return Optional.of(clientKeys);
+        return Optional.ofNullable(clientKeys);
     }
 
     @Override

transport/mqtt/src/main/java/org/thingsboard/server/transport/mqtt/MqttTopics.java

@@ -37,6 +37,8 @@ public class MqttTopics {
     public static final String GATEWAY_ATTRIBUTES_TOPIC = BASE_GATEWAY_API_TOPIC + "/attributes";
     public static final String GATEWAY_TELEMETRY_TOPIC = BASE_GATEWAY_API_TOPIC + "/telemetry";
     public static final String GATEWAY_RPC_TOPIC = BASE_GATEWAY_API_TOPIC + "/rpc";
+    public static final String GATEWAY_ATTRIBUTES_REQUEST_TOPIC = BASE_GATEWAY_API_TOPIC + "/attributes/request";
+    public static final String GATEWAY_ATTRIBUTES_RESPONSE_TOPIC = BASE_GATEWAY_API_TOPIC + "/attributes/response";
 
 
     private MqttTopics() {

transport/mqtt/src/main/java/org/thingsboard/server/transport/mqtt/MqttTransportHandler.java

@@ -134,6 +134,8 @@ public class MqttTransportHandler extends ChannelInboundHandlerAdapter implement
                         gatewaySessionCtx.onDeviceTelemetry(mqttMsg);
                     } else if (topicName.equals(GATEWAY_ATTRIBUTES_TOPIC)) {
                         gatewaySessionCtx.onDeviceAttributes(mqttMsg);
+                    } else if (topicName.equals(GATEWAY_ATTRIBUTES_REQUEST_TOPIC)) {
+                        gatewaySessionCtx.onDeviceAttributesRequest(mqttMsg);
                     } else if (topicName.equals(GATEWAY_RPC_TOPIC)) {
                         gatewaySessionCtx.onDeviceRpcResponse(mqttMsg);
                     } else if (topicName.equals(GATEWAY_CONNECT_TOPIC)) {

transport/mqtt/src/main/java/org/thingsboard/server/transport/mqtt/session/GatewayDeviceSessionCtx.java

@@ -24,7 +24,9 @@ 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 org.thingsboard.server.common.data.kv.KvEntry;
 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;
@@ -88,6 +90,14 @@ public class GatewayDeviceSessionCtx extends DeviceAwareSessionContext {
                     }
                 }
                 break;
+            case GET_ATTRIBUTES_RESPONSE:
+                GetAttributesResponse response = (GetAttributesResponse) msg;
+                if (response.isSuccess()) {
+                    return Optional.of(createMqttPublishMsg(MqttTopics.GATEWAY_ATTRIBUTES_RESPONSE_TOPIC, response));
+                } else {
+                    //TODO: push error handling to the gateway
+                }
+                break;
             case ATTRIBUTES_UPDATE_NOTIFICATION:
                 AttributesUpdateNotification notification = (AttributesUpdateNotification) msg;
                 return Optional.of(createMqttPublishMsg(MqttTopics.GATEWAY_ATTRIBUTES_TOPIC, notification.getData()));
@@ -117,6 +127,39 @@ public class GatewayDeviceSessionCtx extends DeviceAwareSessionContext {
         return 0;
     }
 
+    private MqttMessage createMqttPublishMsg(String topic, GetAttributesResponse response) {
+        JsonObject result = new JsonObject();
+        result.addProperty("id", response.getRequestId());
+        result.addProperty("device", device.getName());
+        if (response.getData().isPresent()) {
+            AttributesKVMsg msg = response.getData().get();
+            if (msg.getClientAttributes() != null) {
+                msg.getClientAttributes().forEach(v -> addValueToJson(result, "value", v));
+            }
+            if (msg.getSharedAttributes() != null) {
+                msg.getSharedAttributes().forEach(v -> addValueToJson(result, "value", v));
+            }
+        }
+        return createMqttPublishMsg(topic, result);
+    }
+
+    private void addValueToJson(JsonObject json, String name, KvEntry entry) {
+        switch (entry.getDataType()) {
+            case BOOLEAN:
+                json.addProperty(name, entry.getBooleanValue().get());
+                break;
+            case STRING:
+                json.addProperty(name, entry.getStrValue().get());
+                break;
+            case DOUBLE:
+                json.addProperty(name, entry.getDoubleValue().get());
+                break;
+            case LONG:
+                json.addProperty(name, entry.getLongValue().get());
+                break;
+        }
+    }
+
     private MqttMessage createMqttPublishMsg(String topic, AttributesKVMsg data) {
         JsonObject result = new JsonObject();
         result.addProperty("device", device.getName());

transport/mqtt/src/main/java/org/thingsboard/server/transport/mqtt/session/GatewaySessionCtx.java

@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2017 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
- * <p>
- * http://www.apache.org/licenses/LICENSE-2.0
- * <p>
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
  * 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.
@@ -15,9 +15,10 @@
  */
 package org.thingsboard.server.transport.mqtt.session;
 
-import com.google.gson.*;
-import io.netty.buffer.ByteBufAllocator;
-import io.netty.buffer.UnpooledByteBufAllocator;
+import com.google.gson.JsonArray;
+import com.google.gson.JsonElement;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonSyntaxException;
 import io.netty.channel.ChannelHandlerContext;
 import io.netty.handler.codec.mqtt.MqttMessage;
 import io.netty.handler.codec.mqtt.MqttPublishMessage;
@@ -27,28 +28,23 @@ 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.msg.core.*;
-import org.thingsboard.server.common.msg.session.AdaptorToSessionActorMsg;
 import org.thingsboard.server.common.msg.session.BasicAdaptorToSessionActorMsg;
 import org.thingsboard.server.common.msg.session.BasicToDeviceActorSessionMsg;
-import org.thingsboard.server.common.msg.session.FromDeviceMsg;
 import org.thingsboard.server.common.msg.session.ctrl.SessionCloseMsg;
 import org.thingsboard.server.common.transport.SessionMsgProcessor;
 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.common.transport.session.DeviceAwareSessionContext;
 import org.thingsboard.server.dao.device.DeviceService;
-import org.thingsboard.server.transport.mqtt.MqttTopics;
 import org.thingsboard.server.transport.mqtt.MqttTransportHandler;
 import org.thingsboard.server.transport.mqtt.adaptors.JsonMqttAdaptor;
 
-import java.nio.charset.Charset;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Optional;
 import java.util.stream.Collectors;
 
-import static org.thingsboard.server.common.msg.session.MsgType.SUBSCRIBE_ATTRIBUTES_REQUEST;
 import static org.thingsboard.server.transport.mqtt.adaptors.JsonMqttAdaptor.validateJsonPayload;
 
 /**
@@ -165,6 +161,29 @@ public class GatewaySessionCtx {
         }
     }
 
+    public void onDeviceAttributesRequest(MqttPublishMessage mqttMsg) throws AdaptorException {
+        JsonElement json = validateJsonPayload(gatewaySessionId, mqttMsg.payload());
+        if (json.isJsonObject()) {
+            JsonObject jsonObj = json.getAsJsonObject();
+            int requestId = jsonObj.get("id").getAsInt();
+            String deviceName = jsonObj.get("device").getAsString();
+            boolean clientScope = jsonObj.get("client").getAsBoolean();
+            String key = jsonObj.get("key").getAsString();
+
+            BasicGetAttributesRequest request;
+            if (clientScope) {
+                request = new BasicGetAttributesRequest(requestId, Collections.singleton(key), null);
+            } else {
+                request = new BasicGetAttributesRequest(requestId, null, Collections.singleton(key));
+            }
+            GatewayDeviceSessionCtx deviceSessionCtx = devices.get(deviceName);
+            processor.process(new BasicToDeviceActorSessionMsg(deviceSessionCtx.getDevice(),
+                    new BasicAdaptorToSessionActorMsg(deviceSessionCtx, request)));
+        } else {
+            throw new JsonSyntaxException("Can't parse value: " + json);
+        }
+    }
+
     private String checkDeviceConnected(String deviceName) {
         if (!devices.containsKey(deviceName)) {
             throw new RuntimeException("Device is not connected!");