Context

A common requirement often encountered when implementing a system of record (SOR) is to allow near real-time dissemination of a record change to disparate systems. One example of a SOR is customer relationship management (CRM), which is responsible for maintaining records about an organisation’s customers.

Consider an Integration project in which the timelines of the different layers make it hard to synchronise the development and test phases across different systems. Or an application integrating with an external system that charges for every call made. Wouldn't it be desirable to limit the paid invocations to such...