Spring Integration - Inbound vs Outbound Channel Adapters

Question

What is the fundamental difference between inbound and outbound channel adapters?

Any examples would be very helpful.

I have reviewed the

Answer 1

in and out are relative directions, it must have a base. in spring integration, the base is the Spring integration framework ( that can be looked as a message bus), the adapters put message into it are in, the adapters take message out from it are out.