1. If your Broker client is designed to be disconnected and reconnected over multiple sessions and needs to preserve the client identifier, you might want to hard-code the client identifier.

2. If your application cooperates with other applications that need to know your client identifier, you can choose to hard-code the client identifier into each of the cooperating applications. If the applications are connected to different Brokers in a multi-Broker environment, you must hard-code the fully-qualified client identifier by adding the name of the Broker to which the client is connected to the client identifier, as shown in the table below.