What is a factory method in Spring?
Spring framework provides facility to inject bean using factory method. To do so, we can use two attributes of bean element. 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.
How do we implement factory patterns in Spring?
In the application, you can create an abstract class, say BasePizzaFactory with a factory method to create a pizza. You can then create a subclass of BasePizzaFactory , called PizzaFactory to implement the factory method. In the factory method, you can create and return a proper Pizza object.
What is bean factory method?
factory-method is used to point to a static method in legacy code that can be used to create a bean. Quite similar to using a static factory method to create a bean, is the use of an instance (non-static) factory method, where a factory method of an existing bean from the factory is called to create the new bean.
Does Spring use factory design pattern?
The Spring framework uses the factory design pattern for the creation of the objects by using two approaches: Spring BeanFactory Container (e.g org. springframework.
What is factory method design pattern?
The Factory Method design pattern is one of the twenty-three well-known “Gang of Four” design patterns that describe how to solve recurring design problems to design flexible and reusable object-oriented software, that is, objects that are easier to implement, change, test, and reuse.
What is factory bean in Spring?
A FactoryBean is a pattern to encapsulate interesting object construction logic in a class. It might be used, for example, to encode the construction of a complex object graph in a reusable way. Often this is used to construct complex objects that have many dependencies.
What is the difference between ApplicationContext and BeanFactory in Spring Framework?
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.
Why should I use factory method?
Advantage of Factory Design Pattern Factory Method Pattern allows the sub-classes to choose the type of objects to create. It promotes the loose-coupling by eliminating the need to bind application-specific classes into the code.
What is the difference between bean factory and ApplicationContext?
Why do we use bean factory?
BeanFactory is the fundamental interface that provides all the basic functionality to create and manage the bean objects and the ApplicationContext interface extends the BeanFactory interface, it provides all the basic functionality and also some advanced features like the ability to load file resources in a generic …
When should you choose ApplicationContext over BeanFactory?
How to create a test using the @factory annotation?
Let’s create a test using the @Factory annotation to understand how to use the factory. The preceding class defines a factory method inside it. A factory method is defined by declaring @Factory above the respective test method. Let’s run the factory now. Simple Test Method. Simple Test Method. PASSED: simpleTest PASSED: simpleTest
What is factory method in Spring Boot?
Instance Factory Method A standard implementation of the factory method pattern is to create an instance method that returns the desired bean. Additionally, we can configure Spring to create our desired bean with or without arguments.
How do you inject a bean using factory method in spring?
Dependency Injection with Factory Method in Spring. Spring framework provides facility to inject bean using factory method. To do so, we can use two attributes of bean element. factory-method: represents the factory method that will be invoked to inject the bean.
What is @di-related annotation in Spring Boot?
DI-Related Annotations 2.1. @Autowired We can use the @Autowired to mark a dependency which Spring is going to resolve and inject. We can use this annotation with a constructor, setter, or field injection.