I am working on WSO2 ESB 4.9.0. We have an API with in and out sequences. All the business logic is there in, in sequence and out sequence doesn't have any logic implemented. Some times we need to exit the flow from in sequence because all our back end service calls are made with call mediator and not with send mediator. In this service chain pattern, if we want to exit the flow, do we need to use respond OR loopback mediator.
Can somebody help me what are the basic use cases where loopback and respond can be used