Sewatech / mqtt-ra

MQTT JCA resource adapter

Getting Started with WildFly

WildFly has no MQTT broker embedded. You'll have to install a start an independent one. For example you can use Mosquitto.

Build the project and run WildFly

mvn clean install
mvn -pl mqtt-ra wildfly:run&
// wait until WildFly has started and mqtt-ra.rar is deployed
mvn -pl mqtt-ra-example wildfly:deploy

It run WildFly. It deploys the MQTT resource adapter and an example application.

At end, you will have to stop WildFly :

mvn -pl mqtt-ra wildfly:shutdown

Play with the example

The example application has 2 MDBs, listening on the swt/Question topic and publishing back on the swt/Answer topic.

Use a mqtt client and

1. subscribe to the swt/Answer topic,
2. publish a text message in the swt/Question topic.

You'll see some print in stdout and a "OK" message in the answer topic.

MQTT Client

What, you don't have a MQTT client ? You could install Mosquitto (bah, it's in french). It comes with the command line mosquitto_pub and mosquitto_sub clients.

What, you don't wanna install this great command line tool ? You're probably not a backend guy/girl. OK, I'll give you some HTML/JS. Hopefully you have a modern browser, then it should work because Tomee+ supports MQTT + WebSockets. The magic page is at the [root of the example application] (http://localhost:8080/mqtt-ra-example/).

How does it work ?

1. Connect
2. Subscriptions : add New Topic Subscription : swt/Answer
3. Publish : on topic swt/Question