Introduction to CDI

If you’re a Java developer, you’ve probably heard of CDI - Contexts and Dependency Injection. CDI is a powerful framework that helps you manage dependencies between different components of your Java application. It provides a wide range of features that make it easy to create modular, extensible, and scalable applications.

In this article, we’ll take a deep dive into CDI and explore its various features. We’ll start by explaining what CDI is and its benefits. We’ll then walk you through how to create a CDI bean and how to inject dependencies into it. We’ll also cover how to manage the lifecycle of a CDI bean, use CDI qualifiers to differentiate between beans of the same type, and fire CDI events to notify other components of an event occurrence.

Additionally, we’ll show you how to use CDI interceptors to modify method invocations and how to use CDI producers to create instances of beans that can’t be instantiated by the container. We’ll also provide you with practical examples to illustrate each feature and help you get started with CDI.

By the end of this article, you’ll have a solid understanding of CDI and its features, and you’ll be equipped with the knowledge to build powerful and scalable Java applications. So, let’s dive in and explore the world of CDI!

Table of contents

• Introduction to CDI
• Creating a CDI Bean
• Dependency Injection in CDI
• Managing the Lifecycle of a CDI Bean
• Using CDI Qualifiers
• Using CDI Events
• Using CDI Interceptors
• Using CDI Producers