Git commit Hash in Gradle build file
The following snippet shows how to get the Git commit hash in a Gradle build file using the Gradle Kotlin DSL.
fun String.execute(): String {
val process = ProcessBuilder(*this.split(" ").toTypedArray())
.directory(project.rootDir)
.redirectErrorStream(true)
.start()
return process.inputStream.bufferedReader().readText().trim()
}
val commitHash = "git rev-parse --verify HEAD".execute()
Wither Methods
Derived Record Creation with Wither Methods
JEP 468: Derived Record Creation
Records are immutable objects, so developers frequently create new records from old records to model new data. Derived creation streamlines code by deriving a new record from an existing record, specifying only the components that are different.
Use a Shortcut To Create a New Text File In a Folder On a Mac
There is no command in the Finder that will let you create a new blank file at your current location. But you can create a Shortcut that will let you do this each time easily. The Shortcut needs to use both JavaScript and shell scripting to get the job done.
Enable the local calendar in Fantastical for Mac
I found a way to enable this thanks to a Reddit post.
Fantastical for Mac needs and extra step to enable the local calendar. I’ll copy and paste what they told (it’s working for me).
- Copy the following line: x-fantastical3://defaults?key=EventKitSyncAll&value=1&type=bool&group=1
- Open your web browser
- Paste the text into the URL field and press enter
- Allow Fantastical to open
- Confirm the alert that appears
- Quit Fantastical completely (Click Fantastical in the menu bar and choose "Quit Fantastical Completely") then open the app again.
Kamal deployments at Commit Conf 2025
I will be delivering a talk about Kamal deployments at Commit Conf 2025, April 4th and 5th 2025.
Configure a Gradle Kotlin DSL to resolve Micronaut Snapshots
Micronaut documentation describes how to use snapshots.
The following snippet, which uses the Kotlin DSL, allows you to resolve Micronaut snapshots:
repositories {
maven {
url = uri("https://s01.oss.sonatype.org/content/repositories/snapshots/")
mavenContent {
snapshotsOnly()
}
}
mavenCentral {
mavenContent {
releasesOnly()
}
}
}
Linking Manifesto
Ensuring their users can conveniently obtain a link to the currently open or selected resource via a user interface; and providing an application programming interface (API) to obtain or construct a link to that resource (i.e., to get its address and name).
Caido - A lightweight web security auditing toolkit
Caido aims to help security professionals and enthusiasts audit web applications with efficiency and ease.
I am interested in web security. I discovered this tool by watching a YouTube video about CSRF.
Revapi, an API analysis and change tracking tool written in Java
I work on open source. Thus, any tool to prevent unintentional breaking changes piques my interest. In Micronaut, we use japicmp.
A Java version of simdjson
A Java version of simdjson - a JSON parser using SIMD instructions, based on the paper Parsing Gigabytes of JSON per Second by Geoff Langdale and Daniel Lemire.
I have not tried it, but it looks like an interesting open-source library.
VSCode Lab for Micronaut
In this lab we will introduce you to the Micronaut tooling available within VS Code. This tooling is very feature-rich and makes building and working with Micronaut applications easy.
Build a Software as a Service applications with Micronaut and deploy them with GraalVM
In this talk, you will learn how Micronaut eases the development of a Software as a Service application (Saas) with the following capabilities:
- Micronaut Data JDBC Multi-Tenancy with Column Discriminator.
- GraalVM Native Image Deployment.
- OpenAPI generation.
- OpenID Connect-based single sign-on.
- Turbo Integration - single-page web application without writing any JavaScript.
- Multi-Language Front-end.
The talk is a mix of slides and code samples. You will see an open-source application and how seamlessly Micronaut integrates the above capabilities.
After this talk, you will understand what the Micronaut framework offers to simplify the development of your next Saas application.
Elevator Pitch
Build a Multi-Tenancy, OpenAPI, OpenID Connect-based single sign-on, Turbo Integrated application and deploy it as a GraalVM Native Image in no time.
Micronaut vs Spring Boot
In this talk, Micronaut committer Sergio del Amo compares the feature set of Spring Boot and Micronaut. This talk introduces developers familiar with Spring Boot to the similarities and differences between the frameworks.
In addition, the talk covers the migration of existing applications and the tools available to simplify the migration to Micronaut.
Also, you will learn how to use Micronaut within a Spring Boot application.
Despliegues Docker con Kamal, adios a la complejidad de Kubernetes
¿Quieres hacer despliegues con Docker pero Kubernetes te parece una bestia y un overkill para tu aplicación?. En esta charla descubrirás una alternativa más sencilla pero poderosa - Kamal.
Kamal ofrece zero-downtime deploys, rolling restarts, asset bridging, remote builds, accessory service management, y todo lo que necesitas para desplegar y gestionar tu aplicación web en producción con Docker.
Durante la charla te mostraré como desplegar una aplicación Micronaut programada con Java y compilada como una imagen nativa con GraalVM con Docker y Kamal. Kamal funciona con todo tipo de aplicación web que pueda ser empaquetada en un contenedor. Es decir, si tu lenguaje de programación o framework no coinciden con el mio, esta charla te servirá igual para descubrir Kamal y como usarlo en tu entorno.
Si asistes a esta charla descubrirás que es Kamal, que te ofrece y como desplegar rápidamente producción con Docker.
Docker Deployments with Kamal, bye-bye to Kubernetes complexity
Do you want to do Docker deployments, but Kubernetes looks like a beast and overkill to you? In this talk, you will discover a simpler but powerful alternative - Kamal.
Kamal offers zero-downtime deploys, rolling restarts, asset bridging, remote builds, accessory service management, and everything you need to deploy and manage your web application in production with Docker.
During this talk, I will show you how to deploy a Micronaut application programmed with Java and compiled into a GraalVM native image with Docker and Kamal. Kamal works with any type of web app that can be containerized. Attend the talk, even if your programming language or framework does not match mine, as you will discover Kamal and how to use it with your toolset.
If you attend this talk, you will discover what Kamal is, what it offers, and how to deploy fast into production with Docker.
On November 5th, 2024, I will talk at XtremeJ 2024
On November 5th 2024, I will be talking at Xtremej.dev.
We are excited to welcome the entire Java community to join us in the coming XtremeJ online conference. We are going to have short sessions (30 minutes each), with speakers from all over the world, online interactive competitions, and experts panels with whome everyone will be able to interact.
Getting Started with the Micronaut Framework
I will be delivering my talk about "Getting Started with the Micronaut Framework"
This session introduces the Micronaut framework and demonstrates how the Framework’s unique compile-time approach enables the development of ultra-lightweight Java applications. Compelling aspects of the Micronaut framework include: + Develop applications with Java, Kotlin, or Apache Groovy + Sub-second startup time + Small processes that can run in as little as 10 MB of JVM heap + No runtime reflection + Dependency injection and AOP + Reflection-free serialization + A database access toolkit that uses ahead-of-time (AoT) compilation to pre-compute queries for repository interfaces. + Cloud-native features. Sergio will also demonstrate how you can generate GraalVM native images of your Micronaut applications to achieve instant startup and ultra-low memory footprint.
Discount Codes
Limited to the first ten passes, they supplied me with two discount codes:
- Use SERGIO40J to get a 40% discount.
- Use SERGIOFREE to get a Free Pass
JUnit @Issue annotation
I was looking to an equivalent to Spock @Issue annotation for JUnit 5, and I found JUnit Pioneer.
JUnit Pioneer provides extensions for JUnit 5 and its Jupiter API. It does not limit itself to proven ideas with wide application but is purposely open to experiments.
How to run Writebook in port 80 instead of 5555
I have installed Writebook in an Oracle Cloud instance. Writebook uses Docker, and it gets installed by default in host port 5555. However, I want to run Writebook in port 80 of the host because it makes it easier to expose it to the Internet from an Oracle Cloud instance.
- Stop Docker
- Edit
hostconfig.jsonfor your container hashsudo vi /var/lib/docker/containers/CONTAINERHASH/hostconfig.jsonand replace"HostPort":"5555"with replace"HostPort":"80". - Start Docker.
Courtesy of this great Stackoverflow answer.
Install Docker on Oracle Cloud Linux 9
I have been trying to install Writebook in an Oracle Cloud instance with Oracle Linux 9. The installer could not install Docker.
To install it manually, I followed this step-by-step guide
Update System Packages
Open a terminal and update your system packages as you see below:
sudo yum update -y
Add Docker Repository
Add Docker’s official repository to your system’s yum sources list as you see in the image below:
sudo yum install -y yum-utils
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
Install Docker Engine
Install Docker Engine, CLI, and contained:
sudo yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
sudo yum install docker-ce docker-ce-cli containerd.io
Start Docker Service
Enable and start the Docker service:
sudo systemctl enable docker
sudo systemctl start docker
Disable Testcontainers JUnit 5 tests without Docker
Testcontainers simplifies testing against third-party components such as databases. But sometimes, you want to run your Junit 5 tests and skip those requiring Docker.
To run Testcontainers-based tests, you need a Docker-API compatible container runtime, such as using Testcontainers Cloud or installing Docker locally.
Luckily, Testcontainers Junit5 integration allows you to toggle these tests by annotating them with @Testcontainers(disabledWithoutDocker = true).