Scenario: Multiple applications communicate with each other in a point-to-point manner. They need to be decoupled by moving this communication over the ESB. One such communication is - App A calling a webservice exposed by App B synchronously. The webservice has a return value and App A consumes the response.

Since existing applciations communicate synchronously, the action pipeline has to be of 'RequestResponse' type. Is it correct ? or 'OneWay' type can also be used in this scenario without any impact on the applications to be integrated?