Gradle Archives - Kotlin Expertise Blog

15Aug 2018 by s1m0nw1 13 Comments

Hibernate with Kotlin – powered by Spring Boot

Gradle, Hibernate, Kotlin, Software Development, Spring

Hibernate with Kotlin - powered by Spring Boot In this post, I'd like to demonstrate what you need to consider when using Hibernate with Kotlin. Hibernate is probably the most famous framework for object-relational mapping (ORM) on the JVM, which is used to persistently store Plain Old Java Objects (POJOs) in relational databases. It also implements the Java Persistence API, a specification that "describes the management of relational data" on the JVM. Summary (TL;DR) Put the kotlin-noarg compiler plugin on your build path, it will generate no-argument constructors for your Hibernate entities. In Gradle, add the following to your buildscript dependencies: classpath("org.jetbrains.kotlin:kotlin-noarg:${kotlinVersion}") Further examples can be found here Enable the kotlin-jpa plugin, which works on top of kotlin-noarg by enabling the no-arg generation for Hibernate annotated classes In Gradle, activate…

25Jul 2018 by s1m0nw1 No Comments

Execute Kotlin Scripts with Gradle

Gradle, Kotlin, Software Development, Teaching, Tutorial

Organize Kotlin Scripts as Gradle tasks In this article, you will learn how you can organize multiple Kotlin scripts as Gradle tasks and make them easily executable this way. I've found a discussion about this here. Somebody wanted to execute Kotlin scripts with Gradle build scripts which is, of course, possible by using kotlinc as shown in this (Groovy) build script. This doesn't look very pretty though, and, as described in the corresponding thread, isn't very performant and manageable. Another solution would be to use Gradle scripts written with the Kotlin DSL and define custom tasks within a build.gradle.kts file, which obviously can hold and run Kotlin code naturally: // build.gradle.kts // // Execute Kotlin task with: gradle -q foo task("foo") { group = "com.kotlinexpertise" description = "my foo task"…

12May 2018 by s1m0nw1 4 Comments

Run Kotlin Scripts (kts) from regular Kotlin Programs

Gradle, Java, Kotlin, Software Development

Run Kotlin Scripts from Kotlin Programs This article presents a way to run Kotlin scripts from Kotlin programs in order to leverage the power of DSLs. Kotlin can be used as a scripting language. Simply write top-level executable code inside a file with .kts extension and run it with the kotlinc as described in the documentation. That's also the format of Gradle build files that are used in combination with the Gradle Kotlin DSL like this gradle.build.kts. Gradle shows a fantastic example of a domain specific language that can be written standalone in .kts files to be read by the gradle tool later on. When we try to find a way to do the same with custom DSLs (Tutorial can be found here), we first need to know how to…

08Mar 2018 by s1m0nw1 2 Comments

Publish Kotlin Library on Bintray using Gradle Kotlin DSL and Travis CI

Gradle, Java, Kotlin, Software Development, Tutorial

Distribute a Library on Bintray using Gradle Kotlin DSL In my latest blog post, published a few weeks back, I informed about the usage of the Gradle Kotlin DSL and how it helps with describing build scripts. In another earlier post, I introduced a small library that can be utilized for simplifying the creation of TLS/SSL sockets using a custom Kotlin DSL: SeKurity. In this post, we'll investigate how such a library can be made available to others that actually want to make use of it inside other projects. Ultimately, it should be possible to list the SeKurity library as a simple dependency in a build script like Maven or Gradle. Since the library itself is already backed by Gradle, I'll show a way of publishing the resulting artifacts at…

02Dec 2017 by s1m0nw1 4 Comments

The Power of Gradle Kotlin DSL

Functional Programming, Gradle, Kotlin, Software Development, Tutorial

-The following is based on Gradle 4.3.1- A few weeks ago I started migrating most of my Groovy-based gradle.build scripts to Kotlin-backed gradle.build.kts scripts using the Kotlin DSL. Why would I do that? Kotlin is my language of choice and I love the idea of using a single language to do all my work. I never learned programming with Groovy and only know the bloody basics, which always makes me think: "This can't be the best way to do things...". Kotlin, on the other hand, is a language I use on a daily basis and therefore I know how to use the language appropriately. Additionally, Kotlin is a statically-typed language, whereas Groovy isn't. IDEs are having hard times offering code completion and error detection at compile time when a Groovy…