I am currently using IBM’s java implementation of WMQTT (found here) to connect to a broker on my server, and I am able to connect my application successfully. However, I have not been able to figure out how to supply a username/password for authentication.
The MqttClient and IMqttClient classes don’t seem to take a password argument, and I have looked through the source for wmqtt.jar, and still can’t find anything that expects a password.
Is it possible to connect with a username/password using WMQTT? I keep finding documentation that it is, but no reference on how to do it in practice using the java implementation.
I believe the situation is that MQTT v3.1 (published 2010) added username/pw auth to the connect() method, but you’re using IA92 which predated that, and the Java client there doesn’t offer that capability.
You may want to see whether the alternative non-IBM Java client MeQanTT works with auth – https://github.com/AlbinTheander/MeQanTT (I’ve not checked)
I’ll definitely ask folks internally to check whether there are plans to release an MQTT 3.1-compatible Java client – I know that WebSphere MQ Telemetry (commercial product from IBM) does provide that but I don’t believe the IA92 SupportPac has been updated to that level right now. Watch This Space!