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Applied Architecture Patterns on the Microsoft Platform - Second Edition by Gregor Noriskin, Dmitri Olechko, Andre Dovgal

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The federated request pattern

Most point-to-point systems work using a simple request-response pattern. The calling application (let's call it a sender) sends a message to another application (let's call it a receiver) and expects a response. The response can simply return a code that indicates success or failure. It can also return a complex set of data. However, in either case, the sender gets back the result of actions performed by the receiver.

Let's consider a system that connects several applications and requires some logic in order to properly send the message. Take, for example, a traffic document processing system that works with two types of documents: traffic tickets and collision reports. Once a police officer creates a traffic ticket ...

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