SpringBoot Whether it is possible to create a class annotated by @ConfigurationProperties before the AOT processing stage can be used directly in BeanFactoryInitializationAotContribution

For example, the AOT processing stage reads mapperLocations in mybatisProperties to add hints.resources()

public class MybatisBeanFactoryInitializationAotContribution implements BeanFactoryInitializationAotContribution {

    private final MybatisProperties mybatisProperties;

    public MybatisBeanFactoryInitializationAotContribution(MybatisProperties mybatisProperties) {
        this.mybatisProperties = mybatisProperties;
    }

    @Override
    public void applyTo(GenerationContext generationContext, BeanFactoryInitializationCode beanFactoryInitializationCode) {
        log.info("MybatisBeanFactoryInitializationAotContribution {}", mybatisProperties.getMapperLocations());

        RuntimeHints hints = generationContext.getRuntimeHints();

        String[] mapperLocations = mybatisProperties.getMapperLocations();
        if (mapperLocations != null) {
            log.info("mapperLocations-{}", mapperLocations);
            Stream.of(mapperLocations).map(item -> item.replace("classpath:/", "")).forEach(hints.resources()::registerPattern);
        }
    }

}

mybatis:
  configuration:
    map-underscore-to-camel-case: true
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
  mapper-locations: classpath:/mapper/*.xml

Comment From: snicoll

@admintertar BeanFactoryInitializationAotContribution runs at build-time during AOT processing. At build-time, we are not instantiating any bean, unless the ones that are preparing the application context.

If you want to rely on this, I suggest to bind the class yourself, something like:

MybatisProperties properties = Binder.get(environment)
        .bind("mybatis", Bindable.of(MybatisProperties.class))
        .get();

Injecting the environment is fine as it's a core framework concern.

Comment From: admintertar

@admintertar BeanFactoryInitializationAotContribution runs at build-time during AOT processing. At build-time, we are not instantiating any bean, unless the ones that are preparing the application context.

If you want to rely on this, I suggest to bind the class yourself, something like:

java MybatisProperties properties = Binder.get(environment) .bind("mybatis", Bindable.of(MybatisProperties.class)) .get();

Injecting the environment is fine as it's a core framework concern.

Thank you very much for your answer! It's very helpful to me.