1. Getting Started with Kotlin Programming Language

• Couse Introduction
• Prerequisites
• Introduction to Kotlin
• How Kotlin Works with the JVM

2. Kotlin Fundamentals FREE CHAPTER

• Project Setup
• Hello Kotlin!
• val and var Variables in Kotlin
• Basic Types - Int, Long, Double, String
• Conditionals - If and When Block
• Ranges, Loops
• while and do-While
• Break, Labels, and Return

3. Functions in Kotlin

• Defining and Invoking Functions
• Default Value Parameters and Named Arguments
• Top-Level Functions and Top-Level Properties

4. Classes, Interfaces, and Inheritance

• Introduction to Class - Creating a Class and Objects
• Primary Constructors
• Secondary Constructors
• Initializer Code Using init Block
• Data Classes
• Custom Getters and Setters
• Inheritance - Extending Classes
• Inheritance - Override Functions, Variables
• Object Keyword for Creating Instance of the Class
• Companion Object Keyword
• Interfaces
• Interfaces - Handling Conflicting Functions
• Interfaces - Defining and Overriding Variables
• Visibility Modifiers
• Type Checking, Casting, and Smart Cast
• Enum Class

5. Nulls in Kotlin

• Nullable and Non-Nullable Types in Kotlin
• Safe Call(?), Elvis Operator (? :), and Non-Null Assertion(!!) to Deal with Null Values
• Invoking or Assigning a Nullable Type to a Non-Nullable Type

6. Collections, Arrays, and Lambda Expressions

• Introduction to Collections
• Introduction to Lambda Expressions
• Lambdas and Higher Order Functions
• Filter Operations on Kotlin Collections
• Map Operations on Kotlin Collections
• FlatMap Operations in Collections
• Working with HashMaps
• Lazy Evaluation of Collections Using Sequences
• Nullability in Collections

7. Exceptions in Kotlin and Scope Functions

• Part 1 - Handling Exceptions in Kotlin Using try-catch
• Part 2 - Introduction to Scope Functions
• Apply and Also Scope Function
• Let Scope Function
• With and Run Scope Function

8. Getting Started with Kotlin and Spring Boot

• Overview of the App and Project Setup
• Build a Simple Endpoint - Greeting Controller
• Constructor Injection in Spring
• Setting Up Different Profiles in Spring Boot
• Set Up Logging in Kotlin

9. Integration/Unit Testing Using Junit 5

• Introduction to Automated Tests and Setting Up JUnit5
• Integration Test for Controller
• Unit Test for Controller - Using the Mock Mocking Library

10. Build the Course Catalog Service

• Set Up the Course Entity and CourseDTO
• Create CourseRepository and Configure JPA in application.yml File
• Build the POST Endpoint for Adding New Course
• Integration Test for the POST Endpoint Using JUnit5
• Build the Get Endpoint to Retrieve All Courses
• Integration Test for the GET Endpoint to Retrieve All the Courses
• Build the Update Endpoint to Update a Course
• Integration Test for the PUT Endpoint Using JUnit5
• Build the DELETE Endpoint to Delete a Course

11. Unit Testing Controller Layer (Web Tier)

• Setting Up the Unit Test for the CourseController
• Unit Test for the Post Endpoint in CourseController
• Unit Test for the GET Endpoint in CourseController
• Unit Test for the PUT Endpoint in CourseController
• Unit Test for the DELETE Endpoint in CourseController

12. Bean Validation Using Validators and ControllerAdvice

• Name and Category as Mandatory Using @NotBlank Annotation
• Implement Custom Error Handling Using ControllerAdvice Pattern
• Handle Global RuntimeException Using ControllerAdvice Pattern

13. Custom JPA Queries Using Spring Data JPA and DB Layer Testing Using @DataJpaTest

• Retrieve Courses by Name using JPA Query Creation Function
• Retrieve Courses by Name Using Native SQL Query
• Testing Multiple Sets of Data Using @Parameterized Test

14. GET Endpoint to Retrieve Courses by Name Using @RequestParam

• Use Existing GET Endpoint to Retrieve Courses by Name
• Write Integration Test to Retrieve Course by Name

15. Entity Relationships Using Spring Data JPA

• Adding Instructor Entity into the Course Catalog Service
• Adding the Relationship to the Entity Class
• Instructor Controller to Manage Instructor Data
• Update CourseService to Validate Instructor Data
• Fix the CourseController Integration Tests
• Fix the CourseController Unit Tests

16. Integrating with Postgres DB

• Setting Up the Postgres DB and App to Interact with Postgres
• Test the App with Postgres DB

17. Integration Testing Using TestContainers

• Setting Up TestContainers for the Integration Test
• Configure @DataJpaTest with TestContainers

18. Java and Kotlin Interoperability

• Invoking Kotlin Code from Java Class
• Invoking Java Code from Kotlin
• Useful JVM Annotations in Kotlin