阿里云IoT平台将设备数据转发到消息队列RocketMQ全链接测试-阿里云开发者协会

技术教室中的搬运工〜2020-04-0319页面浏览量

简介: 本文从为物联网平台创建产品和设备开始，并逐步介绍了整个链接的完整实现.

作者: 乔巴

您可以使用规则引擎将数据从IoT平台转发到消息队列（RocketMQ）进行存储. 为了实现消息从设备，物联网平台，RocketMQ到设备服务器的高可靠性传输能力. 本文从为物联网平台创建产品和设备开始，然后逐步介绍整个链接的完整实现.

参考阿里云IoT平台Qucik开始快速创建产品和设备.

a. 配置概述

b. 处理数据

c您当前的网络存在链路层劫持，转发数据

d. 配置完成后您当前的网络存在链路层劫持，打开规则引擎

相关参考:

SQL语句参考

[数据转发到消息队列RocketMQ

]（）

设备报告属性消息

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 IoTDemoPubSubDemo1 {
    public static String productKey = "*********";
    public static String deviceName = "*********";
    public static String deviceSecret = "*********";
    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";
    private static MqttClient mqttClient;
    public static void main(String [] args){
        // 初始化Mqtt Client对象
        initAliyunIoTClient();
        // 汇报属性
        postDeviceProperties();
    }
    /**
     * 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.setCleanSession(true);
        connOpts.setCleanSession(false);
        connOpts.setUserName(mqttUsername);
        connOpts.setPassword(mqttPassword.toCharArray());
        connOpts.setKeepAliveInterval(60);
        mqttClient.connect(connOpts);
    }
    /**
     * 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\":{\"Status\":1,\"Data\":\"33\"}}";
            MqttMessage message = new MqttMessage(payloadJson.getBytes("utf-8"));
            message.setQos(1);
            mqttClient.publish(pubTopic, message);
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }
}

运行状态显示

参考链接: 基于开源JAVA MQTT客户端连接到阿里云IoT

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