Creating a bean that will be executed when SpringBoot starts the main method.

DriveScannerApplication.java

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;

@SpringBootApplication
public class DriveScannerApplication {

    private static Logger logger = LoggerFactory.getLogger(DriveScannerApplication.class);

    /**
     * Create a main method to execute when the Springboot application starts.
     * @param args
     */
    public static void main(String[] args) {

        if (logger.isInfoEnabled()) {
            logger.info("Starting application");
        }

        final ConfigurableApplicationContext context = SpringApplication.run(DriveScannerApplication.class, args);
    }

}

Test1.java

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;

@Component
public class Test1 implements CommandLineRunner {

    private Logger logger = LoggerFactory.getLogger(Test1.class);

    /**
     * This method overrides the run method as per interface specification.
     * No need to call anything as Spring will search for beans implementing this interface and automatically execute the run method.
     *
     * @param strings
     * @throws Exception
     */
    @Override
    public void run(String... strings) throws Exception {
        logger.info("LOGGER -> Inside test1 ..!!!!!!!!!!!!!!!!");
        try {
            Thread.sleep(15000);
        } catch (Exception ex) {
          //  Testing only so safe to swallow!
        }
    }
}