Quick Answer: What Is BeanFactory And ApplicationContext?

What does ApplicationContext getBean do?

Now Your Question and its simple ApplicationContext activates the object(it is eager container) and looks for the beans declared so the objects are loaded whenever it is called.

getBean(“beanId”) to load instance and to provide data declared with this bean where beanId will tell which object to load ..

What is the use of BeanFactory in spring framework?

This container reads the configuration metadata from an XML file and uses it to create a fully configured system or application. The BeanFactory is usually preferred where the resources are limited like mobile devices or applet-based applications.

What is scope of bean in spring?

Scopes a single bean definition to a single object instance per Spring IoC container. … Scopes a single bean definition to the lifecycle of a single HTTP request; that is each and every HTTP request will have its own instance of a bean created off the back of a single bean definition.

What is the difference between bean factory and application context?

a. One difference between bean factory and application context is that former only instantiate bean when you call getBean() method while ApplicationContext instantiates Singleton bean when the container is started, It doesn’t wait for getBean to be called.

What is spring dependency injection?

Spring Overview Spring provides a light-weight container, e.g. the Spring core container, for dependency injection (DI). This container lets you inject required objects into other objects. This results in a design in which the Java class are not hard-coupled.

What is BeanFactory?

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.

Why ApplicationContext is used in spring?

The ApplicationContext is the central interface within a Spring application that is used for providing configuration information to the application. It implements the BeanFactory interface. … Its main function is to support the creation of big business applications.

What is spring bean life cycle?

Advertisements. The life cycle of a Spring bean is easy to understand. When a bean is instantiated, it may be required to perform some initialization to get it into a usable state. Similarly, when the bean is no longer required and is removed from the container, some cleanup may be required.

How does ApplicationContext work in spring?

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 @autowired used for?

The @Autowired annotation can be used to autowire bean on the setter method just like @Required annotation, constructor, a property or methods with arbitrary names and/or multiple arguments.

What are the types of advice in spring?

In Spring AOP, 4 type of advices are supported :Before advice – Run before the method execution.After returning advice – Run after the method returns a result.After throwing advice – Run after the method throws an exception.Around advice – Run around the method execution, combine all three advices above.

What is factory method in spring?

Spring framework provides facility to inject bean using factory method. … factory-method: represents the factory method that will be invoked to inject the bean. factory-bean: represents the reference of the bean by which factory method will be invoked. It is used if factory method is non-static.

What does ClassPath mean in spring?

What is a ClassPath Resource? A class path resource is like a class or a resource file and is always identified with respect to a class loader. Spring Classpath Resource. In the below example, we demonstrate how classPathResource picks up the the resource based on the classloader we pass.

What is ApplicationContext?

The Application Context is Spring’s advanced container. Similar to BeanFactory, it can load bean definitions, wire beans together, and dispense beans upon request. … BeanFactory can still be used for lightweight applications like mobile devices or applet-based applications.

What is application context bean factory?

BeanFactory vs ApplicationContext One difference between the bean factory and application context is that the former only instantiate bean when you call getBean() method while ApplicationContext instantiates Singleton bean when the container is started, It doesn’t wait for getBean to be called.