Simplifying Configuration with Annotations | Spring Framework Annotation Based Configuration

Hello Everyone,

In this video, we will dive deep into the concept of Annotation Based Configuration in Spring Framework. Traditionally, Spring Framework heavily relied on XML configuration files for setting up the application context, but with the introduction of annotations, the configuration process has become much simpler and concise.

We will start by discussing the different types of annotations that are available in Spring Framework and how they can be used to configure the application context.

We will explore annotations such as @Autowired, @Value, @Primary, @Resource, @Inject and @Qualifier, which are used for dependency injection and wiring. We will discuss the various ways in which these annotations can be used to wire the dependencies between different Spring-managed beans.

Throughout the video, we will be demonstrating each concept with practical examples and code snippets to help you understand how to use annotations for configuring Spring Framework applications.

By the end of this video, you will have a solid understanding of Annotation Based Configuration in Spring Framework, and you will be able to use this knowledge to simplify and streamline the configuration process in your own Spring applications.

Please do share and like the video. Also let me know in the comment section with your feedback.

0:00 Introduction
0:10 Are Annotations Better than XML Configuration?
1:06 What if we use both Annotation and XML Configuration?
1:27 What is @Autowired With Example?
3:15 What is @Primary Annotation used for?
4:23 How to use @Qualifier to fine tune Configuration?
4:46 Example of @Qualifier with Code Snippet
5:56 What will happen if we use @Qualifier and @Primary together?
6:30 How to use @Resource for Dependency Injection?
7:55 Difference between Autowired, Resource and Inject
8:47 @Value: How to Read External Configuration in Java Code

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The Spring Framework is an application framework and inversion of control container for the Java platform. The framework's core features can be used by any Java application, but there are extensions for building web applications on top of the Java EE platform.(Wikipedia)

A BeanFactory is like a factory class that contains a collection of beans. The BeanFactory holds Bean Definitions of multiple beans within itself and then instantiates the bean whenever asked for by clients.

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. These dependencies are reflected in the configuration data used by the BeanFactory

BeanFactory also takes part in the life cycle of a bean, making calls to custom initialization and destruction methods.

Bean life cycle is managed by the spring container. When we run the program then, first of all, the spring container gets started. After that, the container creates the instance of a bean as per the request, and then dependencies are injected. And finally, the bean is destroyed when the spring container is closed. Therefore, if we want to execute some code on the bean instantiation and just after closing the spring container, then we can write that code inside the custom init() method and the destroy() method.

Spring Bean Scope in a nutshell refers to the lifecycle and visibility of a bean instance in a Spring-based application. Bean scopes determine the number of instances of a bean that will be created and how long the bean instances will exist. The five main scopes in Spring are: Singleton, Prototype, Request, Session, and Global Session.

#java #spring #springframework

[ajaykachhiyapatel]

Please provide this video with practical example

[AhmedNasco]

thanks for the video, i just want to add a simple point and correct me if i'm wrong
if we have more than one interface with multiple implementations and treated like a Service bean it can injected by the name value of the implementation without the need of @Qualifier