Compiled Learning Objectives

At the end of the sprint, you should be able to do the following things. Make sure to check you can do them all, and if not, go back and keep practicing until you can.

Layered Architecture (Prep)

• Explain what the term software architecture means
• Explain the benefits of having a layered architecture, and the responsibilities of the database, service and presentation layers
• Describe the architecture of previous projects you have worked on

Dependencies and Dependency Injection (Prep)

• Explain what dependency injection is and why it is useful
• Compare and contrast the different types of dependency injection : constructor and method based (note field injection does also exist but is generally considered bad practice outside of tests and is not covered here)
• Refactor Java classes to use dependency injection and write new classes using DI

The Service Layer (Prep)

• Explain what the service layer is, what it is responsible for, where it sits in the architecture hierarchy and why it is used
• Explain how DI helps to organise classes within the service layer and the problems it solves
• Describe the benefits of using interfaces with dependency injection in services
• Build collections of services as interfaces and using dependency injection