Is it possible to disable an autoconfiguration class from another autoconfiguration class in spring boot?

Question

I'm working on a data access library and would like to be able to include it as a dependency in other projects with minimal configuration (ideally just autowire a repo). In particular, this library sets itself up using an autoconfiguration class (enabled in spring.factories) and needs to disable other autoconfiguration classes to work (DataSourceAutoConfiguration and HibernateJpaAutoConfiguration).

Is it possible to do this outside of the dependent project?

To make configuration as simple as possible I'd like to avoid putting excludes in the dependent project's @SpringBootApplication annotation or its spring.autoconfigure.exclude property.

Update:

On my @Configuration I have tried adding the annotations:

@EnableAutoConfiguration(exclude={
    DataSourceAutoConfiguration.class,
    HibernateJpaAutoConfiguration.class})

this causes

IllegalStateException: Configuration problem: A circular @Import has been detected

and

@ImportAutoConfiguration(exclude={
    DataSourceAutoConfiguration.class, 
    HibernateJpaAutoConfiguration.class})

Which simply does nothing.

Answer 1

There's a very handy interface called AutoConfigurationImportFilter, which decides on which auto-configuration should be loaded. This is also how @ConditionalOnClass annotation works.

In your library, add the following class:

public class MyExclusionFilter
        implements AutoConfigurationImportFilter {

    private static final Set<String> SHOULD_SKIP = new HashSet<>(
            Arrays.asList("org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration",
                    "org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration"));

    @Override
    public boolean[] match(String[] classNames, AutoConfigurationMetadata metadata) {
        boolean[] matches = new boolean[classNames.length];

        for(int i = 0; i< classNames.length; i++) {
            matches[i] = !SHOULD_SKIP.contains(classNames[i]);
        }
        return matches;
    }
}

This class needs to be registered in spring.factories to work. Add the following line in the library into META-INF/spring.factories:

org.springframework.boot.autoconfigure.AutoConfigurationImportFilter=com.mycompany.db.MyExclusionFilter

You don't need to make any changes to the dependent project. Just add the library as a dependency and the auto-configuration you specified won't be loaded for the whole application.

NOTE: You can add more than one import filter, only the auto-configuration classes not filtered in all import filters will get loaded.

For details, see the source code of org.springframework.boot.autoconfigure.AutoConfigurationImportSelector#filter and org.springframework.boot.autoconfigure.condition.OnClassCondition.java classes.