Force DI

Generic dependency injection (DI) library with support for injecting Apex, Visualforce, Lightning, and Flows at runtime.

Documentation

• General overview of the library features, configuration and use of Injectors (blog)
• Using the library to aid with Test Driven Development in Apex (blog)
• Dependency Injection, Flows, and Force DI (blog)
• Adopting Dependency Injection (webinar)
• Understanding the Value of Dependency Injection in the Lightning Platform (DF18 session)

Project Folders

The "core" framework is found in this project. This includes the following:

| Folder | Description | | ------ | ----------- | | force-di | Core library, contains Injector Apex API and <c:di_injector> VF and Lightning Components |

The "samples" of how to use the framework can be found in the Force-DI Samples project.

| Folder | Description | | ------ | ----------- | | force-app-1 | Sample application using the API and Components to inject Apex, VF and Lightning at runtime | | force-app-2 | Sample package providing impls for various bindings above | | force-app-3 | Sample package providing impls for various bindings above | | force-di-trigger-demo | Sample basic trigger framework leveraging the API |

Other Resources on Dependency Injection Design Pattern

Some of these blogs and videos are not necessarily Salesforce-specific but give good insights on use cases and purpose behind this design pattern.

Videos

• Dependency Injection Overview by Anthony Ferrara
• Advanced Apex Design Patterns by Andy Fawcett
• Writing True Unit Tests Using Dependency Injection and Mocking by Alex Tennant

Blogs

• Injection Design Pattern by Martin Fowler
• Dependency Injection is not the same as Dependency Inversion by Derick Bailey
• Dependency Injection by Thorben Janssen