Connection Lifeycle

To connect to the broker, you simply need to invoke connect method

courierClient.connect();

To disconnect, you just need to invoke disconnect method

courierClient.disconnect();

As MQTT supports QoS 1 and QoS 2 message to ensure deliverability when there is no internet connection and user reconnected back to broker, we also persists those message in local cache. To disconnect and remove all of this cache, you can invoke.

courierClient.destroy();

Network Lost Handling

Courier internally handles reconnection in case of bad/lost internet connection.