The process of discovering classes that can contribute to the Application Context, is called Component Scanning. As they are managed by Spring, therefore we also call them Spring-managed Bean or Spring-managed Component. These objects in the Application Context are called ‘Spring Beans’ or ‘Spring Components’. What is Spring Bean or Components?ĭuring Application startup, Spring instantiates objects and adds them to the Application Context(IoC container). Since this is out of our topic ‘Spring Boot Annotations With Examples’, we have discussed about this in detail in a separate article ‘ Spring Core Tutorial‘. The configuration metadata can be represented in three formats: XML, Java annotations, or Java code. The container gets its instructions on what objects to instantiate, configure, and assemble by reading configuration metadata. The interface represents the Spring IoC container and it manages the process of instantiating, configuring, and assembling the beans. Moreover, Dependency injection and auto-wiring of beans is done in Application Context. Spring Framework recommends to use Application Context to get the full features of the framework. The ApplicationContext is a complete superset of the BeanFactory and is used exclusively in this topic in descriptions of Spring’s IoC container. On the other hand, ApplicationContext adds more enterprise-specific functionality including easier integration with Spring’s AOP features message resource handling (for use in internationalization), event publication and application-layer specific contexts such as the WebApplicationContext for use in web applications. In short, the BeanFactory provides the configuration framework and basic functionality. However Spring supports two containers : Bean Factory and Application Context. When you create a project in Spring or Spring Boot, a container or wrapper gets created to manage your beans. What is an Application Context in Spring Framework? ApplicationContext is a sub-interface of BeanFactory. The and packages are the basis for Spring Framework’s IoC container. Sometimes we also call it Spring Container in short. Hence, this process is known as ‘Inversion of control’. Instead of creating objects by the developer, the bean itself controls the instantiation or association of its dependencies by using direct construction of classes with the help of the IoC container. In a nutshell, the IoC is a container that injects dependencies while creating the bean.
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