Spring Data JPA - How to programmatically set JpaRepository base packages

Question

When defining an EntityManager in a Spring Java Config class, I can add the base packages to scan for Entity classes by calling a method on the corresponding builder:

public LocalContainerEntityManagerFactoryBean entityManagerFactory(EntityManagerFactoryBuilder builder) {
  // Some other configuration here
  builder.packages("org.foo.bar", "org.foo.baz");
  return builder.build();
}

I need something similar for the places where Spring looks for Repository Interfaces. The usual way is using the @EnableJpaRepositories annotation:

@EnableJpaRepositories(basePackages = {"org.foo.barbaz"})

But I would like to have a dynamical way for defining these packages similar to the way above for the Entity locations. Something like this:

public SomeJpaRepositoryFactoryBean entityManagerFactory(JpaRepositoryFactoryBuilder builder) {
  // Some other configuration here
  builder.packages("org.foo.barbaz");
  return builder.build();
}

Is there a way to do this with the current Spring Data JPA release is it simply not meant to be done this way?

Answer 1

You can use @AutoConfigurationPackage annotation to add your child module's package to scan-packages.

1. Remove all @EnableJpaRepositories from your child module

2. Add @AutoConfigurationPackage class to the top directory of your child module (similar to @SpringBootApplication, you must put this class to the top-most directory to scan all subpackages):

   @AutoConfigurationPackage
   public class ChildConfiguration {
   }
   

3. Create spring.factories file under /resources/META-INF/spring.factories of your child module and add the configuration class:

   org.springframework.boot.autoconfigure.EnableAutoConfiguration=com.child.package.ChildConfiguration

Now you can @Autowired your repository from your core project. (Tested and worked)