Message-driven
We have already established that the components' isolation and system distribution are two aspects that help to keep the system responsive, resilient, and elastic. Loose and flexible connections is an important condition that supports these qualities, too. And the asynchronous nature of the reactive system simply does not leave the designer any other choice but to build communication between components on messages.
It creates a breathing space around each component, without which the system would be a tightly coupled monolith, susceptible to all kinds of problems, not to mention a maintenance nightmare.
With that, we are going to look at the architectural style that can be used to build an application as a collection of loosely ...
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