What is IoC container in spring?
Spring IoC Container is the core of Spring Framework. It creates the objects, configures and assembles their dependencies, manages their entire life cycle. The Container uses Dependency Injection(DI) to manage the components that make up the application. These objects are called Beans.
What is the use of Spring IoC container?
The Spring IoC container is at the core of the Spring Framework. The container will create the objects, wire them together, configure them, and manage their complete life cycle from creation till destruction. The Spring container uses dependency injection (DI) to manage the components that make up an application.
What is DI and IoC in spring?
DI is the process of providing the dependencies and IoC is the end result of DI. (Note: DI is not the only way to achieve IoC. There are other ways as well.) By DI, the responsibility of creating objects is shifted from our application code to the Spring container; this phenomenon is called IoC.
How many types of IoC containers are there in spring?
two types
There are two types of IoC containers. They are: BeanFactory. ApplicationContext.
What are different ways to achieve spring IoC?
It is achieved using dependency injection, namely field, setter or constructor injection.
What is IoC principle?
Inversion of Control. IoC is a design principle which recommends the inversion of different kinds of controls in object-oriented design to achieve loose coupling between application classes.
What does @bean do 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 DI in Spring with example?
Setter Dependency Injection (SDI) vs. Constructor Dependency Injection (CDI)
| Setter DI | Constructor DI |
|---|---|
| Preferred option when properties are less and mutable objects can be created. | Preferred option when properties on the bean are more and immutable objects (eg: financial processes) are important for application. |
What are different ways to achieve Spring IoC?
How does the IoC container in spring work?
The IoC container gets informations from the XML file and works accordingly. The main tasks performed by IoC container are: There are two types of IoC containers. They are: The org.springframework.beans.factory. BeanFactory and the org.springframework.context. ApplicationContext interfaces acts as the IoC container.
Which is interface acts as the IoC container?
ApplicationContext interfaces acts as the IoC container. The ApplicationContext interface is built on top of the BeanFactory interface.
What does the beanfactory do in Spring IoC?
A BeanFactory is essentially nothing more than the interface for an advanced factory capable of maintaining a registry of different beans and their dependencies. The BeanFactory enables us to read bean definitions and access them using the bean factory. 1.1. How to create BeanFactory
Which is the simplest Spring container for di?
Spring BeanFactory Container is the simplest container which provides basic support for DI. It is defined by org.springframework.beans.factory.BeanFactory interface. There are many implementations of BeanFactory interface that come with Spring where XmlBeanFactory being the most commonly used class.