Spring Boot deferred Flyway inizialization circular dependency

Question

I need to execute Flyway migration after Hibernate generates all the schema table. Before migrating to Spring Boot 2.2 this code worked fine

@Configuration
public class BaseFlywayConfiguration {

    /**
     * Override default flyway initializer to do nothing
     */
    @Bean
    FlywayMigrationInitializer flywayInitializer(Flyway flyway) {
        return new FlywayMigrationInitializer(flyway, (f) -> {
        });
    }

    /**
     * Create a second flyway initializer to run after jpa has created the schema
     */
    @Bean
    @DependsOn("transactionManager")
    FlywayMigrationInitializer delayedFlywayInitializer(Flyway flyway) {
        return new FlywayMigrationInitializer(flyway, null);
    }

}

Unfortunately after migrating to Spring Boot 2.2.0 I receive an Exception related to a circular dependency

This is the log:

The dependencies of some of the beans in the application context form a cycle:

┌─────┐ | transactionManager defined in class path resource [com/myFleetSolutions/myFleet/organization/configuration/jpa/JPAConfigurationDev.class] └─────┘

How can I solve it?

Answer 1

I've simply Injected Flyway bean in the @SpringBootApplication class, and executed flyway.migrate() in the CommandLineRunner init method. It's executed at the end of the system startup and works fine

Thanks

Antonio

Answer 2

Ideally, you would have all your schema create (table, sequence, etc...) in flyway and not use Hibernate to generate that. I would recommend exporting your current schema and then creating a V1__init-schema.sql for flyway to init. Then set hibernate.hbm2ddl.auto to either validate or none.