Reactive Java with Spring WebFlux and Reactor

"Reactive programming is an important coding style that evolved from the functional programming world. Reactive code is ideal for processing and connecting realtime streaming data. You can use reactive programming to compose streams into pipelines that cleanly model complex logic with non-blocking operations. Java has excellent reactive support, and one of the most popular reactive Java frameworks is Spring WebFlux."

"To begin, we'll initialize a new application with the Spring command-line tool, which requires that you have Java 17 or 21 installed. There are a few ways to install the Spring CLI, but I like using SDKMan. You can find the instructions for installing SDKMan for your operating system here. Once you have SDKMan installed, you can add the Spring CLI with: $ sdk i springboot. Now the command $ spring --version should work."

Reactive programming models asynchronous event streams using producers, subscribers, and event handlers to create, process, and combine streams with non-blocking operations. Reactive code suits processing and connecting realtime streaming data and composing streams into pipelines that model complex logic. Spring WebFlux offers an abstraction layer for building reactive web components and supports multiple reactive implementations, with Reactor as the default engine. The Spring command-line tool can initialize new WebFlux applications and requires Java 17 or 21. SDKMan is a common installer for the Spring CLI. The command spring init --dependencies=webflux --build=maven --language=java spring-reactive creates a starter project layout.

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