This is a sub-interface of BeanFactoryPostProcessor (last example). It allows for the registration of bean definitions. It's method postProcessBeanDefinitionRegistry is called before BeanFactoryPostProcessor#postProcessBeanFactory. This interface is more focused on the BeanDefinition registration rather than general purpose BeanFactoryPostProcessor.
The configuration class
package com.logicbig.example;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class MyConfig {
@Bean
public MyBeanDefinitionRegistryPostProcessor myConfigBean() {
return new MyBeanDefinitionRegistryPostProcessor();
}
}
MyConfigBean
package com.logicbig.example;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
import org.springframework.beans.factory.support.BeanDefinitionRegistry;
import org.springframework.beans.factory.support.BeanDefinitionRegistryPostProcessor;
import org.springframework.beans.factory.support.GenericBeanDefinition;
public class MyBeanDefinitionRegistryPostProcessor
implements BeanDefinitionRegistryPostProcessor {
@Override
public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry)
throws BeansException {
GenericBeanDefinition bd = new GenericBeanDefinition();
bd.setBeanClass(MyBean.class);
bd.getPropertyValues().add("strProp", "my string property");
registry.registerBeanDefinition("myBeanName", bd);
}
@Override
public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory)
throws BeansException {
//no op
}
}
The bean
package com.logicbig.example;
public class MyBean {
private String strProp;
public void setStrProp(String strProp) {
this.strProp = strProp;
}
public void doSomething() {
System.out.println("from MyBean: " + strProp);
}
}
The main class
package com.logicbig.example;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
public class BeanDefinitionRegistryPostProcessorExample {
public static void main(String[] args) {
AnnotationConfigApplicationContext context =
new AnnotationConfigApplicationContext(MyConfig.class);
MyBean bean = (MyBean) context.getBean("myBeanName");
bean.doSomething();
}
}
Outputfrom MyBean: my string property
Example ProjectDependencies and Technologies Used: - spring-context 6.2.12 (Spring Context)
Version Compatibility: 3.2.3.RELEASE - 6.2.12 Version compatibilities of spring-context with this example: Versions in green have been tested.
- JDK 25
- Maven 3.9.11
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