REST Architectural Style: Statelessness, Caching, and Layered Systems
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Chapter 3: Statelessness
This means that each request from a service consumer should contain all the necessary information for the service to understand the meaning of the request. All session state data should then be returned to the service consumer at the end of each request.
Figure 5.2. Statelessness ensures that each service consumer request can be treated independently by the service.
