A composition of reactive technologies in action

To learn more about the technologies' composability, let's try to combine several reactive libraries in one Spring Framework 4-based application. In turn, our application is based on the revisited news service functionality with access to it via a plain REST endpoint. This endpoint is responsible for looking up news from the database and external services:

Diagram 3.13. Cross Library communication example inside one application

The preceding diagram introduces three reactive libraries to our system. Here, we use Ratpack as a web server. With the TransfromablePublisher, this allows us to easily  ...

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