What is a microservices architecture and how does Spring Boot support it? माइक्रोसर्विसेज़ आर्किटेक्चर क्या है और स्प्रिंग बूट इसे कैसे सपोर्ट करता है?

Microservices architecture structures an application as a collection of small, independently deployable services, each owning a single business capability and its own data store, communicating over the network via REST, messaging, or gRPC instead of in-process method calls the way a monolith would.

Spring Boot is well suited to microservices because each service can be an independently runnable, self-contained JAR with an embedded server, and the broader Spring Cloud ecosystem adds the cross-cutting concerns microservices need — service discovery (Eureka), centralized configuration (Config Server), routing (Gateway), resilience (Resilience4j), and distributed tracing — without which independent services would be hard to operate reliably at scale.

@SpringBootApplication
public class OrderServiceApplication {
    public static void main(String[] args) {
        SpringApplication.run(OrderServiceApplication.class, args);
    }
}