External client disconnect is not recognized by cli

[gitseti]

Expected behavior

If the client gets disconnected in the client context the cli should inform the user that the current context client is no longer available and change the context back to shell-context.

Actual behavior

The context client is shown, even though it got disconnected, and if a command with that client is used it will throw an error.

To Reproduce

In one terminal 1:
hivemq-cli shell
con -i client
client>

In terminal 2:
hivemq-cli shell
con -i client
E. g. hivemq will produce: Disconnecting already connected client with id client because another client connects with that id
client>

In terminal 1:
client> still shown, but it's actually not connected anymore.
client> pub -t topic -m msg will throw PUBLISH to topic failed with MQTT client is not connected.

Details

• Affected HiveMQ CLI version(s): 1.0
• Used JVM version: 11