CODEWITHSUNDEEP
javaspring
gorodkovskaya
gorodkovskaya

Reputation: 343

Spring @Configuration runtime injection

In my non-Boot Spring 5 project I need to manually register and initialize some beans. After that I want to add a @Configuration class to context, that imports a config from an external lib:

@Configuration
@Import(ExtLibConfig.class)
public class MyExtLibConfig {

  @Bean
  public ExtLibBean extLibBean() {
   return ExtLibBean.builder().build();
  }

}

ExtLibConfig has many of its own @ComponentScan and @Import, and I wish them all to be configured automatically, including my ExtLibBean.

Is it possible to do so in runtime? External lib scans ApplicationContext, and I need it to do so, when my manually registered beans are added.

UPD: The problem is not actual about beans register order. The ext lib is scanning ApplicationContext after its refresh, so I need my beans to be there at this time

Upvotes: 4

Views: 769

Answers (1)

gorodkovskaya
gorodkovskaya

Reputation: 343

The solution was to implement BeanDefinitionRegistryPostProcessor

public class MyMockBeanDefinitioRegistrynPostProcessor implements BeanDefinitionRegistryPostProcessor {

    @Override
    public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {
        // registry.registerBeanDefinition(mockBeanClass, mockBeanDefinition);...

    }

    @Override
    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
        // nothing to do
    }

Then declare it as a Bean:

@Configuration
public class MockBeanConfig {

    @Bean
    public MyMockBeanDefinitioRegistrynPostProcessor mockBeanDefinitionPp() {
        return new MyMockBeanDefinitioRegistrynPostProcessor();
    }

}

And add it to context:

AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();

context.register(MockBeanConfig.class);
context.register(MyExtLibConfig.class);

context.refresh();

Upvotes: 1

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