阿里云物联网平台物模型功能测试示例Demo

  1. 云栖社区>
  2. Java技术进阶>
  3. 博客>
  4. 正文

阿里云物联网平台物模型功能测试示例Demo

taro_秋刀鱼 2020-03-08 19:18:14 浏览1721
展开阅读全文

概述

物模型指将物理空间中的实体数字化,并在云端构建该实体的数据模型。在物联网平台中,定义物模型即定义产品功能。完成功能定义后,系统将自动生成该产品的物模型。物模型描述产品是什么,能做什么,可以对外提供哪些服务。物模型将产品功能类型分为三类:属性、服务、和事件。定义了这三类功能,即完成了物模型的定义。

功能类型 说明
属性(Property) 一般用于描述设备运行时的状态,如环境监测设备所读取的当前环境温度等。属性支持GET和SET请求方式。应用系统可发起对属性的读取和设置请求。
服务(Service) 设备可被外部调用的能力或方法,可设置输入参数和输出参数。相比于属性,服务可通过一条指令实现更复杂的业务逻辑,如执行某项特定的任务。
事件(Event) 设备运行时的事件。事件一般包含需要被外部感知和处理的通知信息,可包含多个输出参数。如,某项任务完成的信息,或者设备发生故障或告警时的温度等,事件可以被订阅和推送。

使用: 设备端可以上报属性和事件;云端可以向设备端发送设置属性和调用服务的指令。

Step By Step

1、产品物模型model.json(替换产品productKey导入即可)

{
    "schema":"https://iotx-tsl.oss-ap-southeast-1.aliyuncs.com/schema.json",
    "profile":{
        "productKey":"a1qLU******"
    },
    "properties":[
        {
            "identifier":"Temperature",
            "name":"温度",
            "accessMode":"rw",
            "desc":"电机工作温度",
            "required":false,
            "dataType":{
                "type":"float",
                "specs":{
                    "min":"-55",
                    "max":"200",
                    "unit":"℃",
                    "step":"0.1"
                }
            }
        }
    ],
    "events":[
        {
            "identifier":"post",
            "name":"post",
            "type":"info",
            "required":true,
            "desc":"属性上报",
            "method":"thing.event.property.post",
            "outputData":[
                {
                    "identifier":"Temperature",
                    "name":"温度",
                    "dataType":{
                        "type":"float",
                        "specs":{
                            "min":"-55",
                            "max":"200",
                            "unit":"℃",
                            "step":"0.1"
                        }
                    }
                }
            ]
        },
        {
            "identifier":"event1",
            "name":"异常事件",
            "type":"info",
            "required":false,
            "method":"thing.event.event1.post",
            "outputData":[
                {
                    "identifier":"event1",
                    "name":"事件参数1",
                    "dataType":{
                        "type":"int",
                        "specs":{
                            "min":"1",
                            "max":"100",
                            "step":"1"
                        }
                    }
                }
            ]
        }
    ],
    "services":[
        {
            "identifier":"set",
            "name":"set",
            "required":true,
            "callType":"async",
            "desc":"属性设置",
            "method":"thing.service.property.set",
            "inputData":[
                {
                    "identifier":"Temperature",
                    "name":"温度",
                    "dataType":{
                        "type":"float",
                        "specs":{
                            "min":"-55",
                            "max":"200",
                            "unit":"℃",
                            "step":"0.1"
                        }
                    }
                }
            ],
            "outputData":[
                
            ]
        },
        {
            "identifier":"get",
            "name":"get",
            "required":true,
            "callType":"async",
            "desc":"属性获取",
            "method":"thing.service.property.get",
            "inputData":[
                "Temperature"
            ],
            "outputData":[
                {
                    "identifier":"Temperature",
                    "name":"温度",
                    "dataType":{
                        "type":"float",
                        "specs":{
                            "min":"-55",
                            "max":"200",
                            "unit":"℃",
                            "step":"0.1"
                        }
                    }
                }
            ]
        },
        {
            "identifier":"addFuctionServiceAsync",
            "name":"异步加法服务",
            "required":false,
            "callType":"async",
            "method":"thing.service.addFuctionServiceAsync",
            "inputData":[
                {
                    "identifier":"add1",
                    "name":"加数1",
                    "dataType":{
                        "type":"int",
                        "specs":{
                            "min":"1",
                            "max":"100",
                            "step":"1"
                        }
                    }
                },
                {
                    "identifier":"add2",
                    "name":"加数2",
                    "dataType":{
                        "type":"int",
                        "specs":{
                            "min":"1",
                            "max":"100",
                            "step":"1"
                        }
                    }
                }
            ],
            "outputData":[
                {
                    "identifier":"result",
                    "name":"结果",
                    "dataType":{
                        "type":"int",
                        "specs":{
                            "min":"1",
                            "max":"200",
                            "step":"1"
                        }
                    }
                }
            ]
        },
        {
            "identifier":"addFuctionServiceSync",
            "name":"加法服务",
            "required":false,
            "callType":"sync",
            "desc":"同步功能",
            "method":"thing.service.addFuctionServiceSync",
            "inputData":[
                {
                    "identifier":"add2",
                    "name":"加数2",
                    "dataType":{
                        "type":"int",
                        "specs":{
                            "min":"1",
                            "max":"100",
                            "step":"1"
                        }
                    }
                },
                {
                    "identifier":"add1",
                    "name":"加数1",
                    "dataType":{
                        "type":"int",
                        "specs":{
                            "min":"1",
                            "max":"100",
                            "step":"1"
                        }
                    }
                }
            ],
            "outputData":[
                {
                    "identifier":"result",
                    "name":"计算结果",
                    "dataType":{
                        "type":"int",
                        "specs":{
                            "min":"1",
                            "max":"200",
                            "step":"1"
                        }
                    }
                }
            ]
        }
    ]
}

2、设备端Code Sample(基于开源Java MQTT Client)

import com.alibaba.fastjson.JSONObject;
import com.alibaba.taro.AliyunIoTSignUtil;
import org.eclipse.paho.client.mqttv3.*;
import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;

import java.util.HashMap;
import java.util.Map;

public class IoTThingTest {

    public static String productKey = "a1qLU******";
    public static String deviceName = "device1";
    public static String deviceSecret = "cA9wzIM6bL2QI6DgAaSO0FPg********";
    public static String regionId = "cn-shanghai";

    // 物模型-属性上报topic
    private static String pubTopic = "/sys/" + productKey + "/" + deviceName + "/thing/event/property/post";
    // 物模型-属性响应topic
    private static String subTopic = "/sys/" + productKey + "/" + deviceName + "/thing/event/property/post_reply";
    // 物模型-事件上报topic
    private static String eventPubTopic = "/sys/" + productKey + "/" + deviceName + "/thing/event/event1/post";

    // 物模型-事件上报响应topic
    private static String eventSubTopic = "/sys/" + productKey + "/" + deviceName + "/thing/event/event1/post_reply";


    private static MqttClient mqttClient;

    public static void main(String [] args){

        // 初始化Client
        initAliyunIoTClient();
        try {
            mqttClient.subscribe(subTopic); // 订阅Topic
            mqttClient.subscribe(eventSubTopic);
        } catch (MqttException e) {
            System.out.println("error:" + e.getMessage());
            e.printStackTrace();
        }

        // 设置订阅监听
        mqttClient.setCallback(new MqttCallback() {
            @Override
            public void connectionLost(Throwable throwable) {
                System.out.println("connection Lost");

            }
            @Override
            public void messageArrived(String s, MqttMessage mqttMessage) throws Exception {
                System.out.println("Sub message");
                System.out.println("Topic : " + s);
                System.out.println(new String(mqttMessage.getPayload())); //打印输出消息payLoad

                // 服务调用处理
                if (s.contains("Async") || s.contains("rrpc")) {
                    String content = new String((byte[]) mqttMessage.getPayload());
                    System.out.println("服务请求Topic:" + s);
                    System.out.println("服务指令:" + content);

                    JSONObject request = JSONObject.parseObject(content);
                    JSONObject params = request.getJSONObject("params");
                    if (!params.containsKey("add1")) { // 检查入参
                        System.out.println("不包含参数add1");
                        return;
                    }
                    Integer input1 = params.getInteger("add1"); // 获取入参
                    Integer input2 = params.getInteger("add2"); // 获取入参
                    JSONObject response = new JSONObject();
                    JSONObject data = new JSONObject();
                    data.put("result", input1 + input2);
                    response.put("id", request.get("id"));
                    response.put("code", 200);
                    response.put("data", data);

                    String responseTopic = s;
                    // 服务响应
                    if (s.contains("rrpc")) {
                        // 同步服务调用响应Topic
                        responseTopic = s.replace("request", "response");
                    } else {
                        // 异步服务调用响应Topic
                        responseTopic = responseTopic + "_reply";
                    }
                    MqttMessage message1 = new MqttMessage(response.toString().getBytes("utf-8"));
                    System.out.println("responseTopic: " + responseTopic);
                    mqttClient.publish(responseTopic, message1);
                }
            }

            @Override
            public void deliveryComplete(IMqttDeliveryToken iMqttDeliveryToken) {

            }
        });

        // 属性上报
        postDeviceProperties();
        // 事件上报
        postDeviceEvent();
    }

    /**
     * 初始化 Client 对象
     */
    private static void initAliyunIoTClient() {

        try {
            // 构造连接需要的参数
            String clientId = "java" + System.currentTimeMillis();
            Map<String, String> params = new HashMap<>(16);
            params.put("productKey", productKey);
            params.put("deviceName", deviceName);
            params.put("clientId", clientId);
            String timestamp = String.valueOf(System.currentTimeMillis());
            params.put("timestamp", timestamp);
            // cn-shanghai
            String targetServer = "tcp://" + productKey + ".iot-as-mqtt."+regionId+".aliyuncs.com:1883";

            String mqttclientId = clientId + "|securemode=3,signmethod=hmacsha1,timestamp=" + timestamp + "|";
            String mqttUsername = deviceName + "&" + productKey;
            String mqttPassword = AliyunIoTSignUtil.sign(params, deviceSecret, "hmacsha1");

            connectMqtt(targetServer, mqttclientId, mqttUsername, mqttPassword);

        } catch (Exception e) {
            System.out.println("initAliyunIoTClient error " + e.getMessage());
        }
    }

    public static void connectMqtt(String url, String clientId, String mqttUsername, String mqttPassword) throws Exception {

        MemoryPersistence persistence = new MemoryPersistence();
        mqttClient = new MqttClient(url, clientId, persistence);
        MqttConnectOptions connOpts = new MqttConnectOptions();
        // MQTT 3.1.1
        connOpts.setMqttVersion(4);
        connOpts.setAutomaticReconnect(false);
        connOpts.setConnectionTimeout(10);
//        connOpts.setCleanSession(true);
        connOpts.setCleanSession(false);

        connOpts.setUserName(mqttUsername);
        connOpts.setPassword(mqttPassword.toCharArray());
        connOpts.setKeepAliveInterval(60);

        mqttClient.connect(connOpts);
    }

    /**
     * 事件上报
     */
    private static void postDeviceEvent() {

        try {
            //上报数据
            //高级版 物模型-属性上报payload
            System.out.println("事件上报");
            String payloadJson = "{\"params\":{\"event1\":23}}";
            MqttMessage message = new MqttMessage(payloadJson.getBytes("utf-8"));
            message.setQos(1);
            mqttClient.publish(eventPubTopic, message);
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }

    /**
     * 汇报属性
     */
    private static void postDeviceProperties() {

        try {
            //上报数据
            //高级版 物模型-属性上报payload
            System.out.println("上报属性值");
            String payloadJson = "{\"params\":{\"Temperature\":13}}";
            MqttMessage message = new MqttMessage(payloadJson.getBytes("utf-8"));
            message.setQos(1);
            mqttClient.publish(pubTopic, message);
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}

参考链接:基于开源JAVA MQTT Client连接阿里云IoT

3、启动设备查看属性及事件上报情况

  • 3.1 服务端情况

_

_

  • 3.2 设备端reply情况
上报属性值
事件上报
Sub message
Topic : /sys/a1qLU******/device1/thing/event/property/post_reply
{"code":200,"data":{},"id":"null","message":"success","method":"thing.event.property.post","version":"1.0"}
Sub message
Topic : /sys/a1qLU******/device1/thing/event/event1/post_reply
{"code":200,"data":{},"id":"null","message":"success","method":"thing.event.event1.post","version":"1.0"}

4、异步服务调用

  • 4.1 说明

通过InvokeThingServiceInvokeThingsService接口调用服务,物联网平台采用异步方式下行推送请求,设备也采用异步方式返回结果。 此时,服务选择为异步调用方式,物联网平台订阅此处的异步响应Topic。异步调用的结果,可以使用规则引擎数据流转功能获取,也可以使用服务端订阅获取。

_

  • 4.3 设备端日志
Sub message
Topic : /sys/a1qLU******/device1/thing/service/addFuctionServiceAsync
{"method":"thing.service.addFuctionServiceAsync","id":"2015524670","params":{"add2":2,"add1":2},"version":"1.0.0"}
服务请求Topic:/sys/a1qLU******/device1/thing/service/addFuctionServiceAsync
服务指令:{"method":"thing.service.addFuctionServiceAsync","id":"2015524670","params":{"add2":2,"add1":2},"version":"1.0.0"}
responseTopic: /sys/a1qLU******/device1/thing/service/addFuctionServiceAsync_reply
  • 4.4 控制台日志

_

  • 4.5 AMQP 服务端订阅获取的服务响应
Content:{"iotId":"*******","code":200,"data":{"result":4},"requestId":"2009566194","topic":"/sys/*******/device1/thing/service/addFuctionServiceAsync_reply","source":"DEVICE","gmtCreate":1583658474852,"productKey":"a1qLU******","deviceName":"device1"}

5、同步服务调用

  • 5.1 说明

通过InvokeThingServiceInvokeThingsService接口调用服务,物联网平台直接使用RRPC同步方式下行推送请求。此时,服务选择为同步调用方式,物联网平台订阅RRPC对应Topic。

_

  • 5.3 设备端日志
Sub message
Topic : /sys/a1qLU******/device1/rrpc/request/1236608506958775809
{"method":"thing.service.addFuctionServiceSync","id":"2015301903","params":{"add2":2,"add1":2},"version":"1.0.0"}
服务请求Topic:/sys/a1qLU******/device1/rrpc/request/1236608506958775809
服务指令:{"method":"thing.service.addFuctionServiceSync","id":"2015301903","params":{"add2":2,"add1":2},"version":"1.0.0"}
responseTopic: /sys/a1qLU******/device1/rrpc/response/1236608506958775809
  • 5.4 控制台日志

_

更多参考

设备属性、事件、服务
同步服务调用
基于开源Java MQTT Client的阿里云物联网平台RRPC功能测试
阿里云物联网平台规则引擎综述

网友评论

登录后评论
0/500
评论
taro_秋刀鱼
+ 关注
所属团队号: Java技术进阶