What is the use of 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 BeanPostProcessor registration?
How to register BeanPostProcessor. An ApplicationContext automatically detects any beans that are defined in the configuration metadata which implement the BeanPostProcessor interface. It registers these beans as post-processors so that they can be called later upon bean creation.
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 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.
How does after returning advice work?
After returning advice: Advice to be executed after a join point completes normally: for example, if a method returns without throwing an exception. After throwing advice: Advice to be executed if a method exits by throwing an exception.
Which method is used to register BeanPostProcessor?
4. Which method is used to register BeanPostProcessor? Explanation: When using a bean factory as your IoC container, bean post processors can only be registered programmatically, or more accurately, via the addBeanPostProcessor() method.
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.
Which interface in Spring is responsible for instantiating and managing the Spring beans?
Spring IoC container
The interface org. springframework. context. ApplicationContext represents the Spring IoC container and is responsible for instantiating, configuring, and assembling the aforementioned beans.
Which bean factory post processor externalizes?
PropertyPlaceholderConfigurer
Explanation: Spring comes with a bean factory post processor called PropertyPlaceholderConfigurer for you to externalize part of the bean configurations into a properties file.
Which of the given options describes an after returning advice?
@AfterReturning is an advice type, which ensures that an advice runs after the method executes successfully. Following is the syntax of @AfterReturning advice.
How to use spring beanpostprocessor in an example?
Spring BeanPostProcessor Example A bean post processor allows for custom modification of new bean instances created by spring bean factory. If you want to implement some custom logic after the Spring container finishes instantiating, configuring, and initializing a bean, we can plug in one or more BeanPostProcessor implementations.
Why do we need a bean post processor?
A bean post processor allows for custom modification of new bean instances created by spring bean factory. If you want to implement some custom logic after the Spring container finishes instantiating, configuring, and initializing a bean, we can plug in one or more BeanPostProcessor implementations.
What does spring beanpostprocessor do for guava beans?
Spring’s BeanPostProcessor gives us hooks into the Spring bean lifecycle to modify its configuration. BeanPostProcessor allows for direct modification of the beans themselves. In this tutorial, we’re going to look at a concrete example of these classes integrating Guava’s EventBus.
How is eventbus wrapper used in spring beanpostprocessor?
To being with, we’ll define an EventBus wrapper to provide some static methods to easily register and unregister beans for events which will be used by the BeanPostProcessor: This code provides static methods for accessing the GlobalEventBus and underlying EventBus as well as registering and unregistering for events and posting events.