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Hexagonal Architecture inside the Hexagon Toolkit

This repository holds the contents of the Hexagonal Architecture inside the Hexagon Toolkit Webinar hosted by JetBrains (big thanks to them), you can check the recorded session in YouTube.

The slides are on the slides folder (surprisingly). They are written in Markdown (slides.md), presented by reveal.js and served by a Kotlin script (though you can use any other means).

For the sake of the demo, all code was contained on a single file, you can check a better structure example in the hexagonal_starter template project.

Below you can find the information regarding the building and running of the presented demo application.

Software Requirements

To build the application you will need:

  • JDK 11+ for compiling the sources.
  • An Internet connection to download the dependencies.

To run the application:

  • For the Gradle distribution: JRE 11+ is required (JDK is not required at runtime).
  • For the jpackage bundle: any major OS will run it (Alpine Linux causes problems).
  • To run the native executable there is no specific requirements.

Development

  • Build: ./gradlew build
  • Rebuild: ./gradlew clean build
  • Run: ./gradlew run
  • Test (*Test): ./gradlew test
  • Integration Test (*IT): ./gradlew verify
  • Test Coverage: ./gradlew jacocoTestReport

The reports are located in the build/reports directory after building the project.

Gradle Wrapper Setup

You can change the Gradle version in gradle/wrapper/gradle-wrapper.properties.

Usage

After building the project (./gradlew build), archives with the application's distributions are stored in build/distributions.

To install the application you just need to unpack one distribution file.

After installing the application, you can run the application executing the bin/gradle_starter script.

Once the application is running, you can send a request using httpie executing: http :9090/api/appointments id='a' userIds:='["mike", "jena"]' start=$(isodate) end=$(isodate) assuming: alias isodate='date +"%Y-%m-%dT%H:%M:%S"'

Native Image

./gradlew -P agent test
./gradlew metadataCopy
./gradlew nativeCompile

# Executable
build/native/nativeCompile/gradle_starter

# Memory
ps -o rss -C gradle_starter

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