BizTalk ESB Toolkit: ESB Service Composition | Service Chaining

In this article, I would brief about service composition or chaining.

Lets say we have set of services running that allows us to booking a taxi/cab and flight and client wants invoke all the service in a sequential manner. Lets say's based on the cab booking status, invoke the the second flight service booking. This can be achieved using service composition logic. 

Itinerary service is defined as shown below, note this is a 2 way itinerary service.

This can be achieved by enabling a simple transformation at the Off-Ramp receive handler and setting routing information for 2nd service call. The dynamic 2-way send port should use ItinerarySendPassThrough send and ItineraryForwarderSendReceive receive pipelines.