CODEWITHSUNDEEP
javaspringspring-boot
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Reputation: 86925

How to inherit @ConditionalOnProperty to any static inner @Configuration class?

How can I create a @Configuration class that holds static inner configuration classes and inherit the @ConditionalOnProperty?

@Configuration
@ConditionalOnProperty(value = "my.property", havingValue = "true")
public class MyConfiguration {
    @Configuration
    static class SubConfig1 {
    }

    @Configuration
    static class SubConfig2 {
    }

    ....
}

In this example, I want the inner classes to load only if the condition on the parent is true, so I don't have to repeat the condition for each config class. Is that possible?

Upvotes: 2

Views: 1698

Answers (1)

Ryuzaki L
Ryuzaki L

Reputation: 40078

Your understanding is wrong on all nested classes that are annotated with @Configuration will be loaded automatically. With nested @Configuration classes

When bootstrapping such an arrangement, only AppConfig need be registered against the application context. By virtue of being a nested @Configuration class, DatabaseConfig will be registered automatically. This avoids the need to use an @Import annotation when the relationship between AppConfig and DatabaseConfig is already implicitly clear.

So by using @ConditionalOnProperty you can only avoid the beans that are declared in config class, but you cannot avoid the nested classes with @Configuration annotation until specified by a condition

For Example Below approch will avoid the beans loading into ApplicationContext if my.property is false

@Configuration
@ConditionalOnProperty(value = "my.property", havingValue = "true")
 public class MyConfiguration {

  @Bean
  public SubConfig1 getSubConfig1() {
     return new SubConfig1();
    }

  @Bean
  public SubConfig2 getSubConfig2() {
     return new SubConfig2();
    }

    static class SubConfig1 {
    }


   static class SubConfig2 {
   }


 }

Upvotes: 2

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