1. A method of deterministic real time stateful business application processing in an otherwise stateless service-oriented architecture (‘SOA’), the SOA comprising SOA services, each SOA service carrying out a processing step of the business application, each SOA service comprising a real time process executable on a real time operating system of a generally programmable computer, the method comprising: configuring each service of the SOA to record state information describing the state of the service upon completion of a processing step in the business application and provide the state information to a subsequent service, the state information including real time processing information, wherein real time processing information includes a real time processing deadline for each processing step of the business application; and executing the business application in the SOA in real time, including sending requests for data processing among the services, each such request comprising a specification of the state of the executing business application.