An inbound endpoint is a CXF service endpoint facade exposed by
the JCA connector. Its role is to accept service requests from
ordinary CXF clients and forward them to an invoker (running in
the context of the activating message driven bean). The invoker
either contains the service implementation or dispatches the call
to a Stateless Session Bean. This class holds objects that are
needed to accomplish the task and provides a shutdown method to
clean up the endpoint.