Database initialisation before bean creation

Question

I am creating a timer application that uses Quartz, also am using spring to initialise my DB from schema.sql file. When application starts I want to DB be initialised before my Scheduler bean is created.

@Bean
public Scheduler scheduler() throws SchedulerException {
    Scheduler scheduler;
    final StdSchedulerFactory stdSchedulerFactory = new StdSchedulerFactory("application.properties");
    stdSchedulerFactory.initialize();
    scheduler = stdSchedulerFactory.getScheduler();
    scheduler.start();
    return scheduler;
}

Scheduler bean is inside TimerConfiguration.java which is added to TimerApplication like

@SpringBootApplication
@Import({TimerConfiguration.class})
public class TimerApplication {

Is there a way to achieve this ?

Answer 1

The @DependsOn annotation specifies a bean which should be initialized after another bean got initialized.

It's recommended to set the name of the waiting bean as value in the annotation.

In your case its @DependsOn("datasource").

More infos from the docs:

Beans on which the current bean depends. Any beans specified are guaranteed to be created by the container before this bean. Used infrequently in cases where a bean does not explicitly depend on another through properties or constructor arguments, but rather depends on the side effects of another bean's initialization.

May be used on any class directly or indirectly annotated with Component or on methods annotated with Bean.