Build RESTful APIs Using Kotlin and Spring Boot

1. Couse Introduction

In this lecture, we will be introduced to the course.

2. Prerequisites

This video introduces you to the course and its projects.

3. Introduction to Kotlin

In this lecture, we will explain why Kotlin is a powerful language for software development.

4. How Kotlin Works with the JVM

In this lecture, we will explain how Kotlin works with the JVM.

1. Project Setup

In this lecture, we will set up the project to explore Kotlin.

2. Hello Kotlin!

In this lecture, we will create a simple HelloKotlin Class and print "Hello Kotlin" in the console.

3. val and var Variables in Kotlin

In this lecture, you will learn about the val and var type in Kotlin to declare the variables.

4. Basic Types - Int, Long, Double, String

In this lecture, we will explore the basic types and the basic operations that can be performed on the basic types.

5. Conditionals - If and When Block

In this lecture, we will explore the if-else block and when block in Kotlin.

6. Ranges, Loops

In this lecture, we will explore ranges and loops.

7. while and do-While

In this lecture, we will explore while and do-while loops.

8. Break, Labels, and Return

In this lecture, we will explore break, labels, and return.

1. Defining and Invoking Functions

In this lecture, we will code and explore diverse types of functions in Kotlin.

2. Default Value Parameters and Named Arguments

In this lecture, we will code and learn about the default parameters and the named arguments for Kotlin functions.

3. Top-Level Functions and Top-Level Properties

In this lecture, we will code and learn about the top-level functions and variables in Kotlin.

1. Introduction to Class - Creating a Class and Objects

In this lecture, we will code and learn about creating a class and instance of a class in Kotlin.

2. Primary Constructors

In this lecture, you will learn about primary conductors.

3. Secondary Constructors

In this lecture, we will code and learn about the secondary constructor in Kotlin.

4. Initializer Code Using init Block

In this lecture, we will code and learn about the usage of init block to run some initialization logic during the instance creation.

5. Data Classes

In this lecture, we will code and learn about the data class in Kotlin.

6. Custom Getters and Setters

In this lecture, we will code and learn about creating custom getters and setters in Kotlin.

7. Inheritance - Extending Classes

In this lecture, we will code and learn about implementing inheritance in Kotlin.

8. Inheritance - Override Functions, Variables

In this lecture, we will code and learn about overriding functions and variables in Kotlin.

9. Object Keyword for Creating Instance of the Class

In this lecture, we will code and learn about the object keyword and its usage in Kotlin.

10. Companion Object Keyword

In this lecture, we will code and learn about the companion object keyword and its usage in Kotlin.

11. Interfaces

In this lecture, we will code and learn about the Interfaces in Kotlin.

12. Interfaces - Handling Conflicting Functions

In this lecture, we will code and learn about the handling conflicting functions in the implementation class.

13. Interfaces - Defining and Overriding Variables

In this lecture, we will code and learn about using variables in Kotlin Interfaces.

14. Visibility Modifiers

In this lecture, we will code and learn about visibility modifiers in Kotlin.

15. Type Checking, Casting, and Smart Cast

In this lecture, we will code and learn about type checking, casting, and smart casting in Kotlin.

16. Enum Class

In this lecture, we will code and learn about Enum classes in Kotlin.

1. Nullable and Non-Nullable Types in Kotlin

In this lecture, we will code and learn about the nullable and non-nullable types in Kotlin.

2. Safe Call(?), Elvis Operator (? :), and Non-Null Assertion(!!) to Deal with Null Values

In this lecture, we will code and learn about the performing operations on a nullable type using the Safe and Elvis operators.

3. Invoking or Assigning a Nullable Type to a Non-Nullable Type

In this lecture, we will code and learn about using a nullable type to deal with non-nullable types.

1. Introduction to Collections

In this lecture, we will be introduced to collections and learn about mutable and immutable collections.

2. Introduction to Lambda Expressions

In this lecture, we will give you all an introduction to lambda expressions and explore lambda expressions using different examples.

3. Lambdas and Higher Order Functions

In this lecture, we will code and explore how to create higher order functions using lambdas.

4. Filter Operations on Kotlin Collections

In this lecture, we will code and explore the filter operator in collections.

5. Map Operations on Kotlin Collections

In this lecture, we will code and explore the map operator in collections.

6. FlatMap Operations in Collections

In this lecture, we will code and explore about the FlatMap operator and when it can be used when working with collections.

7. Working with HashMaps

In this lecture, we will code and explore the different operators that can be used when working with HashMaps.

8. Lazy Evaluation of Collections Using Sequences

In this lecture, we will explore an alternative to work on the collection using sequences for lazy evaluation.

9. Nullability in Collections

In this lecture, we will code and explore nullability and how it works with Kotlin.

1. Part 1 - Handling Exceptions in Kotlin Using try-catch

In this lecture, we will code and learn about the exceptions in Kotlin and how to handle them.

2. Part 2 - Introduction to Scope Functions

In this lecture, we will cover scope functions in Kotlin.

3. Apply and Also Scope Function

In this lecture, we will code and explore the also and apply scope function.

4. Let Scope Function

In this lecture, we will code and explore the let scope function.

5. With and Run Scope Function

In this lecture, we will code and explore the with and run scope function.

1. Overview of the App and Project Setup

In this lecture, we will see an overview of the app and set up the base project for this course.

2. Build a Simple Endpoint - Greeting Controller

In this lecture, we will build a simple rest endpoint using Kotlin and Spring Boot.

3. Constructor Injection in Spring

In this lecture, we will build a service layer and learn to perform constructor injection in Spring Boot.

4. Setting Up Different Profiles in Spring Boot

In this lecture, we will code and learn to set up different profiles in Spring Boot.

5. Set Up Logging in Kotlin

In this lecture, we will set up the logging for the application.

1. Introduction to Automated Tests and Setting Up JUnit5

In this lecture, we will explain about automated tests and set up test folders for unit and integration tests.

2. Integration Test for Controller

In this lecture, we will code and learn to write an integration test for the controller endpoint.

3. Unit Test for Controller - Using the Mock Mocking Library

In this lecture, we will code and learn to write unit test for the controller endpoint.

1. Set Up the Course Entity and CourseDTO

In this lecture, we will code the Entity and DTO for the course catalog service.

2. Create CourseRepository and Configure JPA in application.yml File

In this lecture, we will code and configure the JPA and set up the repository in the project.

3. Build the POST Endpoint for Adding New Course

In this lecture, we will code the POST endpoint to add a new course.

4. Integration Test for the POST Endpoint Using JUnit5

In this lecture, we will write the Integration test for the POST endpoint to create a new course.

5. Build the Get Endpoint to Retrieve All Courses

In this lecture, we will code the GET endpoint to retrieve all the courses.

6. Integration Test for the GET Endpoint to Retrieve All the Courses

In this lecture, we will code the write the integration test for the GET endpoint to retrieve all the courses.

7. Build the Update Endpoint to Update a Course

In this lecture, we will code the PUT endpoint to update an existing course.

8. Integration Test for the PUT Endpoint Using JUnit5

In this lecture, we will write the integration test for the PUT endpoint to update an existing course.

9. Build the DELETE Endpoint to Delete a Course

In this lecture, we will code the Delete endpoint to delete a course using its ID.

1. Setting Up the Unit Test for the CourseController

In this lecture, we will set up the unit test for the CourseController.

2. Unit Test for the Post Endpoint in CourseController

In this lecture, we will write the unit test for the POST endpoint in CourseController.

3. Unit Test for the GET Endpoint in CourseController

In this lecture, we will write the unit test for the GET endpoint in CourseController.

4. Unit Test for the PUT Endpoint in CourseController

In this lecture, we will write the unit test for the PUT endpoint in CourseController.

5. Unit Test for the DELETE Endpoint in CourseController

In this lecture, we will write the unit test for the DELETE endpoint in CourseController.

1. Name and Category as Mandatory Using @NotBlank Annotation

In this lecture, we will the bean validation for the CourseDTO by making the name and category as mandatory.

2. Implement Custom Error Handling Using ControllerAdvice Pattern

In this lecture, we will implement a custom error handler using the ControllerAdvice pattern to handle Bean Validation errors.

3. Handle Global RuntimeException Using ControllerAdvice Pattern

In this lecture, we will implement a custom error handler using the ControllerAdvice pattern for handling any RuntimeException.

1. Retrieve Courses by Name using JPA Query Creation Function

In this lecture, we will write a custom JPA function to retrieve the courses by their name using the JPA helper function.

2. Retrieve Courses by Name Using Native SQL Query

In this lecture, we will write a custom JPA function to retrieve the courses by their name using the Native SQL query.

3. Testing Multiple Sets of Data Using @Parameterized Test

In this lecture, we will code and learn about testing with multiple sets of data using the @Parameterized test annotation.

1. Use Existing GET Endpoint to Retrieve Courses by Name

In this lecture, we will update the GET endpoint to retrieve the courses by their name using the @RequestParam annotation.

2. Write Integration Test to Retrieve Course by Name

In this lecture, we will write the integration test to get the courses by their name.

1. Adding Instructor Entity into the Course Catalog Service

In this lecture, we will be introduced to the instructor entity and its importance.

2. Adding the Relationship to the Entity Class

In this lecture, we will code and learn to implement the relationship between the course and instructor entity.

3. Instructor Controller to Manage Instructor Data

In this lecture, we will build the controller that's going to manage the instructor data.

4. Update CourseService to Validate Instructor Data

In this lecture, we will add business logic to make sure the instructor is valid for every new course that's added.

5. Fix the CourseController Integration Tests

In this lecture, we will fix the integration test cases that are impacted by the addition of instructor to the course catalog service.

6. Fix the CourseController Unit Tests

In this lecture, we will fix the unit test cases that are impacted by the addition of an instructor to the course catalog service.

1. Setting Up the Postgres DB and App to Interact with Postgres

In this lecture, we will set up and configure the Postgres DB into the course catalog service.

2. Test the App with Postgres DB

In this lecture, we will test and make sure the course catalog service works seamlessly with the Postgres DB.

1. Setting Up TestContainers for the Integration Test

In this lecture, we will set up and configure the TestContainers to run the integration test.

2. Configure @DataJpaTest with TestContainers

In this lecture, we will set up and configure the TestContainers to run the integration test for the DB integration tests.

1. Invoking Kotlin Code from Java Class

In this lecture, we will code and learn about invoking the Kotlin from Java source code.

2. Invoking Java Code from Kotlin

In this lecture, we will code and learn about invoking the Java from Kotlin Source Code.

3. Useful JVM Annotations in Kotlin

In this lecture, we will code and learn about the different JVM annotations that are part of Kotlin and are helpful when invoking Kotlin from Java code.