Listening for Clients
The Client Listener is used by the Hazelcast cluster members. It notifies the cluster members when a client is connected to or disconnected from the cluster.
To write a Client Listener class, you implement the ClientListener interface and its methods clientConnected and clientDisconnected,
which are invoked when a client is connected to or disconnected from the cluster.
NOTE: You can also add event listeners to a Hazelcast client. Please refer to Client Listenerconfig for the related information.