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What is difference between BeanPostProcessor and BeanFactoryPostProcessor?

What is difference between BeanPostProcessor and BeanFactoryPostProcessor?

The semantics of this interface are similar to the BeanPostProcessor , with one major difference: BeanFactoryPostProcessor s operate on the bean configuration metadata; that is, the Spring IoC container allows BeanFactoryPostProcessors to read the configuration metadata and potentially change it before the container …

What is BeanPostProcessor?

BeanPostProcessor is used to interact with newly created bean instances before and/or after their initialization method is invoked by the Spring container. You can use BeanPostProcessor to execute custom logic before and/or after bean’s initialization method is invoked by the Spring container.

What is bean factory post processor externalizes?

PropertyResourceConfigurer and PropertyPlaceHolderConfigurer – implemented as a bean factory post-processor, is used to externalize some property values from a BeanFactory definition, into another separate file in Java Properties format.

How do I register my BeanPostProcessor?

Create the bean instance either by a constructor or by a factory method. Set the values and bean references to the bean properties. Call the setter methods defined in the all the aware interfaces. Pass the bean instance to the postProcessBeforeInitialization() method of each bean post processor.

When should I use BeanFactoryPostProcessor?

A bean implementing BeanFactoryPostProcessor is called when all bean definitions will have been loaded, but no beans will have been instantiated yet. This allows for overriding or adding properties even to eager-initializing beans.

What is PropertyPlaceholderConfigurer in Spring?

The PropertyPlaceholderConfigurer is a property resource configurer that resolves placeholders in bean property values of context definitions. It pulls values from a properties file into bean definitions.

What is a BeanFactoryPostProcessor and what is it used for?

What is true about BeanPostProcessor?

BeanPostProcessor is interface that tells Spring to do some processing after initialization some beans. BeanPostProcessor is interface that tells Spring to do some processing after initialization some beans. This allows you to add some custom logic before and after spring bean creation.

What is the use of BeanFactoryPostProcessor?

BeanFactoryPostProcessor implementation is used to read the configuration metadata and potentially change it before beans are instantiated by IOC container.

What is the difference between BeanPostProcessor and init destroy method in Spring?

The difference to the @PostConstruct , InitializingBean and custom init method is that these are defined on the bean itself. Their ordering can be found in the Combining lifecycle mechanisms section of the spring documentation.

What is a Propertysourcesplaceholderconfigurer used for?

PropertyPlaceholderConfigurer is used to resolve ${…} placeholders against a property. It can be local properties or system properties or environment variables. We can use PropertyPlaceholderConfigurer using XML as well as annotation.

What kind of interface does beanfactorypostprocessor use?

BeanFactoryPostProcessoris an interface and beans that implement it are actually beans that undergo the Spring lifecycle (Example below) but these beans don’t take part of the other declared beans’ lifecycle.

Can you write your own beanpostprocessor in spring?

BeanPostProcessors interface provides methods that you can implement to have your own instantiation logic.Also you can write your own logic after spring IOC finishes instantiating, configuring, and initializing a bean by plugging in one or more BeanPostProcessor implementations.

When is beanpostprocessor executed after init or init?

BeanPostprocessoris executed after the bean object is created, as it can be executed before init()and after init(). Share Improve this answer Follow edited Jul 13 ’18 at 14:08

Is the beanfactorypostprocessor not part of spring lifecycle events?

Does this mean BeanFactoryPostProcessoris not a part of spring lifecycle events as it’s called before instantiation while BeanPostProcessoris the part of Spring lifecycle events? Kindly verify if my understanding is right. javaspring Share Improve this question Follow edited May 26 ’15 at 10:17 M. Deinum