What the Main Annotation Does

@SpringBootConfiguration
@EnableAutoConfiguration
@ComponentScan
public class BookingApplication {

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

We removed @SpringBootApplication from the booking service and wrote these three annotations in its place. The service started as before, GET /hello answered, and the container held 147 beans, the same number it held with the single annotation.

The two versions behave the same because they are the same

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