NewCache - create a message cache.

NewCacheHandler - handler to receive messages into a cache.

NewControlAgent - create an agent that only listens on a control channel, and has a default AgentRun func.

NewExchange - create a new controller2.

Ping - function to "ping" an agent.

Receiver - receives reply messages and forwards to a function which will return true if the receiving is complete.

SendReply - function used by message recipient to reply with a Status.

disable data channel receive.

enable data channel receive.

Cache - message cache by uri.

Exchange - controller2 directory.

Message - message.

Agent - intelligent agent TODO : Track agent assignment as part of the URI or separate identifier?? //Uri() string //Message(m *Message) Track agent NID or class/type?.

OnShutdown - add functions to be run on shutdown.

Handler - uniform interface for message handling.

Map - map of messages.

SendFunc - uniform interface for messaging.