README.md

springboot-kotlin-crud

A simple RESTful API application to perform CRUD operations using Spring Boot, Kotlin, Gradle, H2 database and Java 11

This project consists of APIs to perform CRUD operations for a single Entity (Employee)

List of APIs

Create - POST

• http://localhost:8080/crudwebservice/employees

Read - GET

• http://localhost:8080/crudwebservice/employees
• http://localhost:8080/crudwebservice/employees/{wwid}
• http://localhost:8080/crudwebservice/employees/hasMultipleLastname

Update - PUT

• http://localhost:8080/crudwebservice/employees/{wwid}

Delete - DELETE

• http://localhost:8080/crudwebservice/employees/{wwid}

This project was created using https://start.spring.io/ as a start with following options

• Project – Gradle Project
• Language – Kotlin
• Spring Boot - 2.4.2
• Packaging – war
• Java – 11
• Dependencies
  • Spring Web
  • Spring Data JPA
  • H2 Database
  • OpenFeign
• IDE used for development – IntelliJ IDEA 2020.3.2 (Community Edition)

Features

• Application runs on Undertow web server
• REST controller named EmployeeController that exposes CRUD operations for Employee Entity. APIs mentioned in above table are available
• Service layer named EmployeeService that performs data validation on the following fields
  • Firstname – checks if it has only alphabets
  • lastname – checks if it has only alphabets
  • email – checks if it is a valid email address
• Repository named EmployeeDao has a query method (findOneByWwid) which retrieves one employee based on wwid
• Repository named EmployeeDao also has a custom query method (hasMultipleLastName) which retrieves employees who have multiple last name
• RepositoriesTest has a unit test for the repository class
• Consume a public RESTful API https://mailboxlayer.com using Spring Cloud OpenFeign to validate email address