CODEWITHSUNDEEP
spring-bootdependency-injectionspring-dataflyway
mararn1618
mararn1618

Reputation: 467

Flyway 6 JavaMigrations with Native Dependency Injection for Spring Beans

I have seen many great workarounds to create Flyway JavaMigrations and injecting Spring Beans using @DependsOn and ApplicationContextAware (e.g. https://stackoverflow.com/a/48242865/5244937).

However a part of the Flyway 6 documentation claims Dependency Injection would be possible natively for Spring Beans:

Is is true? How would this work?

Upvotes: 3

Views: 2192

Answers (2)

anydoby
anydoby

Reputation: 438

Adding to the answer of @Stuck (lombok optional of course).

@Configuration
@RequiredArgsConstructor
public class FlywayConfiguration implements FlywayConfigurationCustomizer {
    
    final JavaMigration[] migrations;

    @Override
    public void customize(FluentConfiguration configuration) {
        configuration.javaMigrations(migrations);
    }
}

Upvotes: 0

Stuck
Stuck

Reputation: 12292

Mark your migrations as @Component and put them in a folder that is scanned by spring (e.g. within your application package and not in db.migrations). This will ensure @Autowired can be used because the bean is instantiated by spring. (The migrations in db.migrations will be scanned by flyway automatically and are not instantiated by spring.)

Then implement a FlywayConfigurationCustomizer to add the migrations by loading them from the spring context:

@Configuration
class FlywayConfiguration implements FlywayConfigurationCustomizer {
    @Autowired
    private ApplicationContext applicationContext;

    @Override
    public void customize(FluentConfiguration configuration) {
        JavaMigration[] migrationBeans = applicationContext
         .getBeansOfType(JavaMigration.class)
         .values().toArray(new JavaMigration[0]);
        configuration.javaMigrations(migrationBeans);
    }
}

Upvotes: 7

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