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Wednesday, September 25, 2024

Pros and Cons of the three fundamental types of Dependency Injection (DI)

Here are the pros and cons of the three fundamental types of Dependency Injection (DI): 
  1. Constructor Injection
  2. Field (or Property) Injection
  3. Method (or Setter) Injection

Three fundamental types of Dependency Injection (DI)

The three fundamental types of Dependency Injection (DI) in Kotlin and Java are:

  1. Constructor Injection
  2. Field (or Property) Injection
  3. Method (or Setter) Injection

Each type of DI handles injecting dependencies into a class in different ways. Let's explore these in detail:

1. Constructor Injection

With constructor injection, the dependencies are passed through a class constructor. This is the most common and preferred form of dependency injection because it makes the class more explicit and easier to test. The dependencies are required at the time of object creation.

This example effectively illustrates the principles of Dependency Injection

Dependency Injection (DI) is a software design pattern that promotes loose coupling between classes by passing dependencies (objects that a class needs to function) into the class rather than having the class create them itself. This makes code more modular, testable, and maintainable.

Here's a simplified example of how DI works: