Move the control API shared between Cache and LayeredCache into its own
struct. But keep the control logic handling separate - it requires
access to the local values, like dropped and deleteItem.
Stop is now a control message. Channels are no longer closed as part
of the stop process.
Move the control API shared between Cache and LayeredCache into its own struct. But keep the control logic handling separate - it requires access to the local values, like dropped and deleteItem.
Stop is now a control message. Channels are no longer closed as part of the stop process.