工业互联网需要采集设备底层数据进行实时数据展示与状态预警，由于底层硬件设备无法采用http等重量级请求发送数据，工业上常常采用MQTT协议进行数据传输，本次基于阿里云物联网平台进行数据采集，本次主要云端收集信息与数据下发，云端采用AMQP方式接入，该方式使得云端服务同时具体发布与订阅功能；设备端采用阿里云IOT平台MQTT.fx模拟接入
环境：JDK1.8+maven+springboot
GitHub源码地址：https://github.com/hou296498161/amqp
1.添加以下依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.aliyun</groupId>
<artifactId>aliyun-java-sdk-core</artifactId>
<version>3.7.1</version>
</dependency>
<dependency>
<groupId>com.aliyun</groupId>
<artifactId>aliyun-java-sdk-iot</artifactId>
<version>6.11.0</version>
</dependency>
<dependency>
<groupId>org.msgpack</groupId>
<artifactId>msgpack</artifactId>
<version>0.6.12</version>
</dependency>
<!-- util for base64-->
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.10</version>
</dependency>
<dependency>
<groupId>org.apache.qpid</groupId>
<artifactId>qpid-jms-client</artifactId>
<version>0.47.0</version>
</dependency>
1）、阿里云创建产品，定义自定义topic，类型为发布订阅
2）、创建产品、
3）、创建服务端订阅
2、服务端订阅消息
package com.ali.amqp.subscribe;
import org.apache.commons.codec.binary.Base64;
import org.apache.qpid.jms.JmsConnection;
import org.apache.qpid.jms.JmsConnectionListener;
import org.apache.qpid.jms.message.JmsInboundMessageDispatch;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import javax.jms.*;
import javax.naming.Context;
import javax.naming.InitialContext;
import java.net.URI;
import java.util.Hashtable;
import java.util.UUID;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
/**
* 云端订阅消息
*/
public class AmqpJavaClient {
private final static Logger logger = LoggerFactory.getLogger(AmqpJavaClient.class);
//业务处理异步线程池，线程池参数可以根据您的业务特点调整；或者您也可以用其他异步方式处理接收到的消息
private final static ExecutorService executorService = new ThreadPoolExecutor(
Runtime.getRuntime().availableProcessors(),
Runtime.getRuntime().availableProcessors() * 2, 60, TimeUnit.SECONDS,
new LinkedBlockingQueue<>(50000));
public static void subscribe() throws Exception {
//参数说明参见阿里云文档：AMQP客户端接入说明。
String accessKey = "你的阿里云accessKey";
String accessSecret = "你的阿里云 accessSecret";
//消费组ID
String consumerGroupId = "DEFAULT_GROUP";
long timeStamp = System.currentTimeMillis();
//签名方法：支持hmacmd5，hmacsha1和hmacsha256
String signMethod = "hmacsha1";
//控制台服务端订阅中消费组状态页客户端ID一栏将显示clientId参数。
//建议使用机器UUID、MAC地址、IP等唯一标识等作为clientId。便于您区分识别不同的客户端。
String clientId = UUID.randomUUID().toString().replaceAll("-","");
//UserName组装方法，请参见阿里云文档：AMQP客户端接入说明。
String userName = clientId + "|authMode=aksign"
+ ",signMethod=" + signMethod
+ ",timestamp=" + timeStamp
+ ",authId=" + accessKey
+ ",consumerGroupId=" + consumerGroupId
+ "|";
//password组装方法，请参见上一篇文档：AMQP客户端接入说明。
String signContent = "authId=" + accessKey + "×tamp=" + timeStamp;
String password = doSign(signContent,accessSecret, signMethod);
//按照qpid-jms的规范，组装连接URL。
String connectionUrl = "failover:(amqps://1090243284576461.iot-amqp.cn-shanghai.aliyuncs.com:5671?amqp.idleTimeout=80000)"
+ "?failover.reconnectDelay=30";
Hashtable<String, String> hashtable = new Hashtable<>();
hashtable.put("connectionfactory.SBCF",connectionUrl);
hashtable.put("queue.QUEUE", "default");
hashtable.put(Context.INITIAL_CONTEXT_FACTORY, "org.apache.qpid.jms.jndi.JmsInitialContextFactory");
Context context = new InitialContext(hashtable);
ConnectionFactory cf = (ConnectionFactory)context.lookup("SBCF");
Destination queue = (Destination)context.lookup("QUEUE");
// Create Connection
Connection connection = cf.createConnection(userName, password);
((JmsConnection) connection).addConnectionListener(myJmsConnectionListener);
// Create Session
// Session.CLIENT_ACKNOWLEDGE: 收到消息后，需要手动调用message.acknowledge()
// Session.AUTO_ACKNOWLEDGE: SDK自动ACK（推荐）
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
connection.start();
// Create Receiver Link
MessageConsumer consumer = session.createConsumer(queue);
consumer.setMessageListener(messageListener);
}
private static MessageListener messageListener = new MessageListener() {
@Override
public void onMessage(Message message) {
try {
if (message.getBody(byte[].class)==null){
logger.error("收到一条空的消息，topic->{}",message.getStringProperty("topic"));
}else {
logger.info("收到消息：topic->{}:{}",message.getStringProperty("topic"),new String(message.getBody(byte[].class)));
}
//1.收到消息之后一定要ACK
// 推荐做法：创建Session选择Session.AUTO_ACKNOWLEDGE，这里会自动ACK。
// 其他做法：创建Session选择Session.CLIENT_ACKNOWLEDGE，这里一定要调message.acknowledge()来ACK。
// message.acknowledge();
//2.建议异步处理收到的消息，确保onMessage函数里没有耗时逻辑。
// 如果业务处理耗时过程过长阻塞住线程，可能会影响SDK收到消息后的正常回调。
executorService.submit(() ->System.out.println(""));
} catch (Exception e) {
logger.error("submit task occurs exception ", e);
}
}
};
private static JmsConnectionListener myJmsConnectionListener = new JmsConnectionListener() {
/**
* 连接成功建立
*/
@Override
public void onConnectionEstablished(URI remoteURI) {
logger.info("onConnectionEstablished, remoteUri:{}", remoteURI);
}
/**
* 尝试过最大重试次数之后，最终连接失败。
*/
@Override
public void onConnectionFailure(Throwable error) {
logger.error("onConnectionFailure, {}", error.getMessage());
}
/**
* 连接中断。
*/
@Override
public void onConnectionInterrupted(URI remoteURI) {
logger.info("onConnectionInterrupted, remoteUri:{}", remoteURI);
}
/**
* 连接中断后又自动重连上。
*/
@Override
public void onConnectionRestored(URI remoteURI) {
logger.info("onConnectionRestored, remoteUri:{}", remoteURI);
}
@Override
public void onInboundMessage(JmsInboundMessageDispatch envelope) {}
@Override
public void onSessionClosed(Session session, Throwable cause) {}
@Override
public void onConsumerClosed(MessageConsumer consumer, Throwable cause) {}
@Override
public void onProducerClosed(MessageProducer producer, Throwable cause) {}
};
/**
* password签名计算方法，请参见阿里云文档：AMQP客户端接入说明。
*/
private static String doSign(String toSignString, String secret, String signMethod) throws Exception {
SecretKeySpec signingKey = new SecretKeySpec(secret.getBytes(), signMethod);
Mac mac = Mac.getInstance(signMethod);
mac.init(signingKey);
byte[] rawHmac = mac.doFinal(toSignString.getBytes());
return Base64.encodeBase64String(rawHmac);
}
}
3服务端发布
package com.ali.amqp.publish;
import com.ali.amqp.subscribe.AmqpJavaClient;
import com.aliyuncs.DefaultAcsClient;
import com.aliyuncs.IAcsClient;
import com.aliyuncs.iot.model.v20180120.PubRequest;
import com.aliyuncs.iot.model.v20180120.PubResponse;
import com.aliyuncs.profile.DefaultProfile;
import org.apache.commons.codec.binary.Base64;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.*;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
import java.text.SimpleDateFormat;
/**
* 云端下发消息
*/
public class PopPubServer {
private final static Logger logger = LoggerFactory.getLogger(PopPubServer.class);
public static boolean sendToTopic(String topic) throws UnsupportedEncodingException {
String regionId = "cn-shanghai";
String accessKey = "你的accessKey";
String accessSecret = "你的accessSecret";
final String productKey = "设备productKey";
//设置client的参数
DefaultProfile profile = DefaultProfile.getProfile(regionId, accessKey, accessSecret);
IAcsClient autoClient = new DefaultAcsClient(profile);
PubRequest request = new PubRequest();
request.setQos(0);
//设置发布消息的topic
request.setTopicFullName("/a14UPaWxJCF/test_device/user/test");
request.setProductKey(productKey);
//设置消息的内容，一定要用base64编码，否则乱码
Base64 base64 = new Base64();
request.setMessageContent(base64.encodeToString("hello".getBytes("UTF-8")));
try {
PubResponse response = autoClient.getAcsResponse(request);
Boolean success = response.getSuccess();
return success;
} catch (Exception e) {
logger.warn("阿里云消息发送异常，topic:{},异常信息：{}",topic,e.getMessage());
return false;
}
}
}