Equipment access
Create the product, select the parameters (read the documentation for the parameters), use either the default topic or the custom topic, and then select the feature definition (the custom Topic model). The custom topic may not use the object model, but you need to select the data parsing, add the parsing script, and submit and publish the device. When reporting data using a custom topic, add it at the end of the topic link? _sn=default flag, which the iot platform will call parsing script to format the reported bytecode data and return a JSON to be consumed by the business service area in this topic. The device developer can download the SDK and certificate to the device by themselves, and also report data according to the way in which the MQTT module of Node is used to simulate the device in the document for the convenience of testing. Testing can also be done using on-line testing in monitoring operations or equipment simulations.
Rules engines flow data
The data reported by the device needs to be transferred to the business service or other storage for business analysis or operation. At this time, the rule engine is needed to be transferred, which can be generally divided into two categories. One is the way that the server subscribes to AMQP flow and MNS, and the other is transferred to other specified cloud products, such as RokcetMQ, RDS, DataHub, etc Connections to ecS cannot be transferred to cloud products other than the specified cloud products.
Amqp Only AMQP is mentioned here
Rely on
<! -- amqp 1.0 qPID client --> <dependency> <groupId>org.apache.qpid</groupId> <artifactId> qpID-jM-client </artifactId> The < version > 0.47.0 < / version > < / dependency > <! -- util for base64--> <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> The < version > 1.10 < / version > < / dependency >Copy the codeClient code, preferably using the accesskey of the child account.
import java.net.URI;
import java.util.Hashtable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.naming.Context;
import javax.naming.InitialContext;
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;
public class AmqpJavaClientDemo {
private final static Logger logger = LoggerFactory.getLogger(AmqpJavaClientDemo.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 main(String[] args) throws Exception {
//参数说明，请参见AMQP客户端接入说明文档。
String accessKey = "${YourAccessKey}";
String accessSecret = "${YourAccessSecret}";
String consumerGroupId = "${YourConsumerGroupId}";
//iotInstanceId：企业版实例请填写实例ID，公共实例请填空字符串""。
String iotInstanceId = "${YourIotInstanceId}";
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 = "${YourClientId}";
//userName组装方法，请参见AMQP客户端接入说明文档。
String userName = clientId + "|authMode=aksign"
+ ",signMethod=" + signMethod
+ ",timestamp=" + timeStamp
+ ",authId=" + accessKey
+ ",iotInstanceId=" + iotInstanceId
+ ",consumerGroupId=" + consumerGroupId
+ "|";
//计算签名，password组装方法，请参见AMQP客户端接入说明文档。
String signContent = "authId=" + accessKey + "×tamp=" + timeStamp;
String password = doSign(signContent,accessSecret, signMethod);
//${YourHost}为接入域名，请参见AMQP客户端接入说明文档。
String connectionUrl = "failover:(amqps://${YourHost}: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");
// 创建连接。
Connection connection = cf.createConnection(userName, password);
((JmsConnection) connection).addConnectionListener(myJmsConnectionListener);
// 创建会话。
// 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();
// 创建Receiver连接。
MessageConsumer consumer = session.createConsumer(queue);
consumer.setMessageListener(messageListener);
}
private static MessageListener messageListener = new MessageListener() {
@Override
public void onMessage(final Message message) {
try {
//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(new Runnable() {
@Override
public void run() {
processMessage(message);
}
});
} catch (Exception e) {
logger.error("submit task occurs exception ", e);
}
}
};
/**
* 在这里处理您收到消息后的具体业务逻辑。
*/
private static void processMessage(Message message) {
try {
byte[] body = message.getBody(byte[].class);
String content = new String(body);
String topic = message.getStringProperty("topic");
String messageId = message.getStringProperty("messageId");
logger.info("receive message"
+ ",\n topic = " + topic
+ ",\n messageId = " + messageId
+ ",\n content = " + content);
} catch (Exception e) {
logger.error("processMessage occurs error ", 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) {}
};
/**
* 计算签名，password组装方法，请参见AMQP客户端接入说明文档。
*/
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);
}
}
Copy the codeParameters that