Scala Reactive Programming

Message Flow Patterns

As we have discussed, Reactive Systems comprise a set of components. Each component may be a Reactive Microservice. A Reactive System may also depend on some external components (such as data store, REST API, filesystem, server, and so on). We need some common mechanism to communicate between the components to fulfill those components' jobs.

As per the Reactive Manifesto, the following are the four Reactive Design principles or characteristics of a Reactive System:

• Message-Driven
• Elasticity
• Resilience
• Responsiveness

Take a look at the following Reactive Design Principles diagram:

We can observe from the diagram that ...