Question

Thanks In Advance!

I have Mqtt installed on Raspberry-Pi and publishing sensor data to mqtt on port 1883. Using Paho client published data is verified on receiver side.

Now i Have RabbitMQ installed on Windows7. How do i send data from mqtt to rabbitmq.

Graph graph = new OrientGraph("remote:localhost:2424/test", "username", "password");
String query = "select @rid ad base, inE('child').outV() as source from V where name='vertex3'";

OrientGraph oGraph = (OrientGraph)graph;
OCommandSQL oCommandSQL = new OCommandSQL(query);
Iterable<Vertex> vertices = oGraph.command(oCommandSQL).execute();
Iterator<Vertex> verticesIterator = vertices.iterator();
Vertex resultVertex = verticesIterator.next();
OrientElementIterable<Element> elements = resultVertex.getProperty("source");
Iterator<Element> elementIterator = elements.iterator();
Vertex sourceVertex = null;
while (elementIterator.hasNext()) {
    sourceVertex = (Vertex) elementIterator.next();
}
Vertex v3 = graph.getVertex("#11:0");
Edge edge = graph.addEdge(null, v3, sourceVertex, "new");
graph.shutdown();

Mqtt Connection is made dafault without credentials. Now How can i send data to RabbitMQ.

Answer 1

您所描述的是MQTT桥。您可以在pi上配置mosquitto实例以连接到RabbitMQ代理（假设它配置为支持MQTT）。

有关如何配置网桥的详细信息，请参见mosquitto.conf手册页here。

基本上，您需要在配置中添加以下内容。

connection rabbitmq
address ip-of-rabbitmq
cleansession true
topic # out 0

Answer 2

通过从命令提示符运行命令在rabbitmq上启用mqtt插件打开cmd的cmd提示路径到Rabbitmq / sbin，默认情况下是Windows中的C：\ Program Files \ RabbitMQ Server \ rabbitmq_server-3.6.9 \ sbin然后运行命令。

“rabbitmq-plugins启用rabbitmq_mqtt”

我们需要设置运行rabbitmq的服务器系统的Topic，url。随机发送clientId。将Qos设置为0 OR 1 OR 2

String topic = "amq.topic"; String brokerUrlRpi_Mqtt = "tcp://192.168.xxx.xxx:1883/"; String clientId=UUID.randomUUID().toString();

如果从不同的系统发送mqtt数据，用户名和密码应该是在rabbitmq中创建的新用户。如果mqtt和rabbitmq在本地运行，那么访客用户名和密码就可以了。

`

public  SendDataUsingMQTT() throws MqttException {
            String tmpDir = System.getProperty("java.io.tmpdir");
//          MqttDefaultFilePersistence dataStore = new MqttDefaultFilePersistence(tmpDir);
            try {
              conOpt = new MqttConnectOptions();
              conOpt.setUserName("username");
              conOpt.setPassword(new String("password").toCharArray());
              conOpt.setCleanSession(true);
            client = new MqttClient(brokerUrlRpi_Mqtt,clientId, datastore);

 client.setCallback(new MqttCallback() { 

// add all anonymous implemented methods of connect
 public void messageArrived(String arg0, MqttMessage arg1) throws Exception {

//
}
public void deliveryComplete(IMqttDeliveryToken arg0) { }
 public void connectionLost(Throwable arg0) {}
}
catch (MqttException e) {
            e.printStackTrace();
            System.out.println("Unable to set up client: "+e.toString());
            System.exit(1);
          }               
          }

How to send data from MQTT to AMQP

2 个答案: