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 GenericApplicationContext?
Generic ApplicationContext implementation that holds a single internal DefaultListableBeanFactory instance and does not assume a specific bean definition format. Typical usage is to register a variety of bean definitions via the BeanDefinitionRegistry interface and then call AbstractApplicationContext.
What is configurable application context?
Interface ConfigurableApplicationContext. Provides facilities to configure an application context in addition to the application context client methods in the ApplicationContext interface. Configuration and lifecycle methods are encapsulated here to avoid making them obvious to ApplicationContext client code.
What is ClassPathXmlApplicationContext in spring?
The Spring container is responsible for instantiating and managing the lifecycle of Spring beans. The ClassPathXmlApplicationContext is a class that implements the org. springframework. context. ApplicationContext interface.
What is @bean in Spring boot?
Spring @Bean annotation tells that a method produces a bean to be managed by the Spring container. It is a method-level annotation. During Java configuration ( @Configuration ), the method is executed and its return value is registered as a bean within a BeanFactory .
What is a Javabean exactly?
The ‘beans’ of JavaBeans are classes that encapsulate one or more objects into a single standardized object (the bean). As part of the standardization, all beans must be serializable, have a zero-argument constructor, and allow access to properties using getter and setter methods.
What is dispatcher servlet in Spring boot?
The DispatcherServlet is the front controller in Spring web applications. It’s used to create web applications and REST services in Spring MVC. In a traditional Spring web application, this servlet is defined in the web. xml file to DispatcherServlet in a Spring Boot application.
What is configurable application context in Spring boot?
ApplicationContext is a corner stone of a Spring Boot application. It represents the Spring IoC container and is responsible for instantiating, configuring, and assembling the beans. The container gets its instructions on what objects to instantiate, configure, and assemble by reading configuration metadata.
What is a BeanFactory in Spring?
1. The BeanFactory. The BeanFactory is the actual container which instantiates, configures, and manages a number of beans. These beans typically collaborate with one another, and thus have dependencies between themselves.
What is dependency injection in Spring?
Dependency Injection is a fundamental aspect of the Spring framework, through which the Spring container “injects” objects into other objects or “dependencies”. Simply put, this allows for loose coupling of components and moves the responsibility of managing components onto the container.
What is @bean used for?
@Bean is used to mark a method as one that creates a bean and Spring will then add it to the context for us. The return type of the method defines the type of bean that is created, so both of the beans created in this example will be referred to by the type MyBean rather than their implementations.
What is the difference between @autowired and @bean?
On Bean @Target annotation confirms that it can be applied over a METHOD. This is an alternative to the JSR-330 Inject annotation. On Autowired @Target confirms that it can be applied over a CONSTRUCTOR,METHOD,PARAMETER,FIELD. IoC is also known as dependency injection (DI).