How to do it...

1. Create the file named StartupRunner.java under the src/main/java/com/example/bookpub/ directory from the root of our project with the following content:

        package com.example.bookpub; 

        import com.example.bookpub.repository.BookRepository;
        import org.apache.commons.logging.Log; 
        import org.apache.commons.logging.LogFactory; 
        import org.springframework.beans.factory.annotation.Autowired;
        import org.springframework.boot.CommandLineRunner; 
        import org.springframework.scheduling.annotation.Scheduled;

        public class StartupRunner implements CommandLineRunner { 
            protected final Log logger = LogFactory.getLog(getClass()); 
            @Override 
            public void run(String... args) throws Exception { 
                logger.info("Hello"); 
            } 
        }

1. After we have defined the class, let's proceed by defining it as @Bean in the BookPubApplication.java application configuration, which is located in the same folder as our newly created StartupRunner.java file as follows:

@Bean 
public StartupRunner schedulerRunner() { 
    return new StartupRunner(); 
}