Overview

This training provides a deep understanding of Dependency Injection and Service Locator techniques, which are essential for managing dependencies between the modules and classes in our code. Dependencies among code structures are crucial for maintaining and modifying the codebase. Creating these dependencies in an orderly and loosely coupled way can significantly impact the overall development cost of a software project.

The course starts by explaining the fundamental principles of object construction, then presents decision-making patterns for selecting the most suitable construction technique based on context, and concludes with guidelines for laying a solid foundation for Dependency Injection both at project initiation and at later stages.

Additionally, the course explores the benefits of Dependency Injection and Service Locator for making testable code and isolating it from changes in external APIs or systems.

Motivation

Code that is costly to change, fragile, highly coupled, and dependent on external APIs often lacks proper dependency management. Mastering dependencies provides the tools to establish a strategy for preventing these issues in new codebases or gradually refactoring legacy code towards better practices.

Using Dependency Injection and Service Locator as foundational techniques leads to more testable code, better isolation of volatile areas, and an effective Separation of Concerns.

While Dependency Injection and Service Locator are popular today, a deep understanding of these techniques, along with real-world recipes, can make a significant difference in applying them effectively.

Learning Objectives

• Understand the principles of Dependency Injection and Service Locator.
• Learn how to decouple modules for improved maintainability.
• Apply dependency management techniques to enhance testability.
• Develop strategies for isolating code from external dependencies.

Target Audience

• Junior and mid-level developers would benefit greatly from this training
• Suitable for integration into Internship Programs

Outline

➟ onsite: one day
➟ online: one day with 4-hour session

Commonly this course is integrated in training programs along the 'Application Infrastructure for Clean Architecture' or 'Code Desing Practices'.

• Define Dependencies
• The Dependency Rule
• Acyclic Dependencies Principle
• Build Against Unwanted Dependencies
• Separating Construction from Use
• Dependency Injection
• Service Locator
• Using Dependency Injection and Service Locator