Enum InterfaceAction 

pub enum InterfaceAction {
    Shutdown,
    Message(Transaction),
    Subscribe(Simple),
}

Each module that wants to interact with the Switch has a custom enum of possible cases. This is to avoid having to handle a lot of impossible cases in the Switch loop.

Variants

Shutdown

Will shut down the Switch thread. (But nothing else).

Message(Transaction)

Send a complete Transaction to the Switch (and to the TcpHandler from there). The restrictions and rules described in the send function apply.

Subscribe(Simple)

Passes a new Simple (minified version of the Topic) to the Switch, from where the Subscribe info will be distributed through the system.