Connect MQTT broker with pre-signed url

HiveMQ Client Library
8

Hi mestre,

Are you already signed up for a free hivemq cloud account? Once you are signed, to go your cluster and click Manage Cluster → Getting started. In the list of sample client find one that says Java(Websocket) hivemq-mqtt-client:
image

There you will find an example of Websocket Client: https://console.hivemq.cloud/clients/websocket-java

Take a look at the code that is building the client:

final Mqtt5BlockingClient client = MqttClient.builder()
                .useMqttVersion5()
                .serverHost(host)
                .serverPort(8884)
                .sslWithDefaultConfig()
                .webSocketConfig()
                .serverPath("mqtt")
                .applyWebSocketConfig()
                .buildBlocking();

Note a few things:

  • subprotocol is not explicitly updated, it is, by default, “mqtt”;
  • serverPath is “mqtt” (like in your last attempt);
  • there is a call to .applyWebSocketConfig() before .buildBlocking();

Please try to change your code this way and let us know the result. For the queryString use the part of the string that follows the “?”: “protocol://host:port/mqtt?xxx-xxx-xxx-xxx-xxx-x…”

Thanks,
Dasha from HiveMQ Team