Kotlin version of the Spring PetClinic Sample Application 
This is a Kotlin version of the spring-petclinic Application.
Technologies used
- Language: Kotlin
- Core framework: Spring Boot 2.0 with Spring Framework 5 Kotlin support
- Server: Netty
- Web framework: Spring MVC and Spring WebFlux (for testing)
- Templates: Thymeleaf and Bootstrap
- Reactive API: Reactor
- Persistence : Spring Data JPA
- Databases: H2 and MySQL both supported
- Build: Gradle Script with the Kotlin DSL
- Testing: Junit 5, Mockito and AssertJ
Running petclinic locally
git clone https://github.com/spring-petclinic/spring-petclinic-kotlin.git
cd spring-petclinic-kotlin
./gradlew bootRun
You can then access petclinic here: http://localhost:8080/
In case you find a bug/suggested improvement for Spring Petclinic
Our issue tracker is available here: https://github.com/spring-petclinic/spring-petclinic-kotlin/issues
Database configuration
In its default configuration, Petclinic uses an in-memory database (HSQLDB) which gets populated at startup with data. A similar setup is provided for MySql in case a persistent database configuration is needed. Note that whenever the database type is changed, the data-access.properties file needs to be updated and the mysql-connector-java artifact from the pom.xml needs to be uncommented.
You could start a MySql database with docker:
docker run -e MYSQL_ROOT_PASSWORD=petclinic -e MYSQL_DATABASE=petclinic -p 3306:3306 mysql:5.7.8
Looking for something in particular?
| Features | Class, files or Java property files |
|---|---|
| The Main Class | PetClinicApplication |
| Properties configuration file | application.properties |
| Gradle build script with Kotlin DSL | build.gradle.kts |
| Caching Configuration | CacheConfig |
Import and run the project in IntelliJ IDEA
- Make sure you have at least IntelliJ IDEA 2017.2 and IDEA Kotlin plugin 1.1.60+ (menu Tools -> Kotlin -> configure Kotlin Plugin Updates -> make sure "Stable" channel is selected -> check for updates now -> restart IDE after the update)
- Import it in IDEA as a Gradle project
- Go to the menu "File -> New -> Project from Existing Sources... "
- Select the spring-petclinic-kotlin directory then choose "Import the project from Gradle"
- Select the "Use gradle wrapper task configuration" radio button
- In IntelliJ IDEA, right click on PetClinicApplication.kt then "Run..." or "Debug..."
- Open http://localhost:8080/ in your browser
Documentation
- Migrez une application Java Spring Boot vers kotlin (french)
- Migration Spring Web MVC vers Spring WebFlux (french)
Interesting Spring Petclinic forks
The Spring Petclinic master branch in the main spring-projects GitHub org is the "canonical" implementation, currently based on Spring Boot and Thymeleaf.
This spring-petclinic-kotlin project is one of the several forks hosted in a special GitHub org: spring-petclinic. If you have a special interest in a different technology stack that could be used to implement the Pet Clinic then please join the community there.
| Link | Main technologies |
|---|---|
| spring-petclinic | "Canonical" implementation of Spring Petclinic based on Spring Boot and Thymeleaf |
| spring-framework-petclinic | Spring Framework XML configuration, JSP pages, 3 persistence layers: JDBC, JPA and Spring Data JPA |
| javaconfig branch | Same frameworks as the spring-framework-petclinic but with Java Configuration instead of XML |
| spring-petclinic-angularjs | AngularJS 1.x, Spring Boot and Spring Data JPA |
| spring-petclinic-angular | Angular 4 front-end of the Petclinic REST API spring-petclinic-rest |
| spring-petclinic-microservices | Distributed version of Spring Petclinic built with Spring Cloud |
| spring-petclinic-reactjs | ReactJS (with TypeScript) and Spring Boot |
| spring-petclinic-graphql | GraphQL version based on React Appolo, TypeScript and GraphQL Spring boot starter |
| spring-petclinic-kotlin | Kotlin version of spring-petclinic |
| spring-petclinic-rest | Backend REST API |
Interaction with other open source projects
One of the best parts about working on the Spring Petclinic application is that we have the opportunity to work in direct contact with many Open Source projects. We found some bugs/suggested improvements on various topics such as Spring, Spring Data, Bean Validation and even Eclipse! In many cases, they've been fixed/implemented in just a few days. Here is a list of them:
| Name | Issue |
|---|---|
| Spring JDBC: simplify usage of NamedParameterJdbcTemplate | SPR-10256 and SPR-10257 |
| Bean Validation / Hibernate Validator: simplify Maven dependencies and backward compatibility | HV-790 and HV-792 |
| Spring Data: provide more flexibility when working with JPQL queries | DATAJPA-292 |
Contributing
The issue tracker is the preferred channel for bug reports, features requests and submitting pull requests.
For pull requests, editor preferences are available in the editor config for easy use in common text editors. Read more and download plugins at http://editorconfig.org.