Reactive software refers to an approach and design paradigm in which systems are developed to respond to events, changes, or user interactions in real time. This approach aims to create systems that are robust, scalable, and responsive, especially in high-load environments or distributed systems. Here are some key concepts and characteristics of reactive software:
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Responsive : Reactive systems respond promptly and consistently to user requests, thereby providing a reliable user experience.
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Resilient : They are designed to continue functioning even if there is a fault or failure in one part of the system. Failures are isolated and the system can heal itself to restore normal function.
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Elastic (Scalable) : Reactive systems can adapt to changing loads by dynamically increasing or decreasing resources to keep performance constant.
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Message-Driven : They rely on asynchronous message communication to decouple components, resulting in better scalability and fault tolerance.
The reactive approach was popularized by the "Reactive Manifesto", a document describing the basic principles of reactive systems. Reactive programming and reactive system designs are particularly useful in modern applications that have high requirements for scalability, availability and fault tolerance, such as cloud-based services, real-time applications and distributed systems.
Frameworks and tools such as Akka, Reactor, RxJava and Spring WebFlux support the development of reactive applications by providing abstractions and APIs that facilitate the reactive approach.
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