What are the consequences of launching a Spring Boot application with @SpringBootApplication and @EnableAfterConfiguration annotations?

The @SpringBootApplication annotation is a convenient combination of three annotations: @Configuration, @EnableAutoConfiguration, and @ComponentScan. It indicates that the class is the entry point of a Spring Boot application and includes automatic configuration and component scanning.

The @EnableAfterConfiguration annotation is not standard in Spring Boot. It might refer to @EnableAutoConfiguration or a custom annotation. If we assume it is a custom annotation that activates configuration after the main one, its use could affect the order of configuration loading.

When launching an application with @SpringBootApplication, automatic Spring context setup, component scanning, and embedded server startup (e.g., Tomcat) occur. If @EnableAfterConfiguration is added, depending on its implementation, it may activate additional configuration that runs after the main one, allowing for extension or overriding of settings.

Example:

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

In summary, @SpringBootApplication simplifies application startup, while @EnableAfterConfiguration (if it is a custom annotation) influences the order of configuration initialization.