What can I use instead of PostConstruct?
What can I use instead of PostConstruct?
We can replace @PostConstruct with BeanFactoryPostProcessor and PriorityOrdered interface. The first one defines an action that ought to be executed after the object’s instantiation.
What is the use of ApplicationContextAware?
The ApplicationContextAware is used for bean lookup purpose and for those objects which needs to access file resources.
How do I reinitialize a spring bean?
1 Answer
- Reload method In the Bean. Create a method in your bean which will update/reload its properties.
- Delete & Register Bean in Registry. You can use DefaultSingletonBeanRegistry to remove & re-register your bean.
- @RefreshScope. Useful for refreshing bean value properties from config changes.
What is the role of ApplicationContextAware in spring?
The ApplicationContextAware Interface Spring provides an ApplicationContextAware interface that allows beans access to the ApplicationContext . This interface provides a single setApplicationContext method.
Why do we use @PostConstruct?
The PostConstruct annotation is used on a method that needs to be executed after dependency injection is done to perform any initialization. This method MUST be invoked before the class is put into service. This annotation MUST be supported on all classes that support dependency injection.
Is PostConstruct deprecated?
In jdk9 @PostConstruct and @PreDestroy are in java. xml. ws. annotation which is deprecated and scheduled for removal.
What is AnnotationConfigApplicationContext?
AnnotationConfigApplicationContext is a standalone application context which accepts annotated classes as input. For instance, @Configuration or @Component . Beans can be looked up with scan() or registered with register() .
What is InitializingBean Spring?
The InitializingBean is an interface containing afterPropertiesSet() method. A bean can use it to perform a task required after the bean properties are set. The BeanFactory invokes afterPropertiesSet() method once the bean properties are initialized.
What is the difference between BeanFactory and ApplicationContext?
While the BeanFactory provides basic functionality for managing and manipulating beans, often in a programmatic way, the ApplicationContext provides extra functionality like MessageSource, Access to resources, Event propagation to beans, Loading of multiple (hierarchical) contexts etc.
Where is a PostConstruct used?