This blog post guides readers on building a production-grade Spring Boot application using an AI coding assistant. It covers key steps including setting up prerequisites, generating OpenAPI specifications, and creating database migration scripts with Liquibase. Despite occasional … | Continue reading
This blog discusses the effectiveness of AI coding assistants, focusing on their real-life applications and limitations. While these tools can save time in specific coding tasks, users often face challenges in generating accurate responses. By providing practical examples and ref … | Continue reading
This blog examines the effectiveness of AI coding assistants, highlighting their potential and limitations. Real-world tasks demonstrate how these tools can assist in coding, such as generating Javadoc, class naming, and Docker Compose files. While beneficial in specific scenario … | Continue reading
The blog discusses the effectiveness of AI coding assistants, highlighting their capabilities and limitations. It demonstrates practical applications, such as explaining Kubernetes YAML, Java code, regular expressions, and cron expressions. While these assistants can enhance unde … | Continue reading
Open WebUI is a self-hosted, offline AI interface that operates locally and emphasizes data privacy. It supports various inference engines and works well with models like Ollama. The platform offers features such as knowledge integration and web searches for enhanced responses, a … | Continue reading
This blog discusses the implementation of Retrieval Augmented Generation (RAG) using PGVector, LangChain4j, and Ollama. It emphasizes document embedding, semantic search, and the conversion of markdown data into JSON. The setup allows users to query information about Bruce Spring … | Continue reading
Spring AI integrates artificial intelligence into Spring Boot applications, simplifying the process using familiar abstractions. Currently available as a milestone release, it highlights the functionality of Java-based AI solutions. The blog outlines prerequisites, project setup, … | Continue reading
Spring Shell provides a simple Command Line Interface (CLI) for Spring Boot applications, eliminating the need for complex web UIs. Users can create commands with arguments and validation using both legacy and new annotation models. Spring Shell also facilitates interactive mode … | Continue reading
The blog discusses the implications of using "mvn install" on build servers, highlighting risks where feature branch artifacts may inadvertently mix with stable branches. It outlines differences between "mvn verify" and "mvn install," and suggests solutions, including using enhan … | Continue reading
This blog explains how to fetch data from tables with jOOQ featuring one-to-one, one-to-many, and many-to-many relationships. The application, built with Spring Boot, utilizes repositories to perform CRUD operations. Prerequisites include Java, Spring Boot, jOOQ, and basic OpenAP … | Continue reading
In October 2024, Devoxx Belgium showcased in-depth sessions on Java, testing methodologies, and AI advancements. Highlights included discussions on Spring Boot testing best practices and Retrieval Augmented Generation (RAG). The event featured a range of topics, enriching attende … | Continue reading
Devoxx Genie is a Java-based plugin for IntelliJ IDEA that enables integration with various local and cloud-based LLMs, providing flexibility in coding assistance. Key features include project scanning, customizable prompts, chat memory, and cost estimation for token usage. It's … | Continue reading
This blog introduces jOOQ, Liquibase, and Testcontainers integration in a Spring Boot application. It covers setting up the application, adding Liquibase for database management, generating jOOQ code, integrating a repository, implementing controller methods, and using Testcontai … | Continue reading
The Testcontainers Docker Compose Module allows convenient creation of integration tests for applications dependent on multiple containers. This blog explains how to use this module to integrate with a multi-container application, specifically FROST-Server, and create unit tests. … | Continue reading
Maven Archetypes enable you to create project templates, enforcing best practices. You can generate archetypes from scratch or based on existing projects. Use the "mvn archetype:generate" command to create archetypes from scratch, select the archetype from the list, and provide n … | Continue reading
This blog discusses integrating Cucumber with Spring Boot and passing arguments to step definitions. The prerequisites, application under test, Spring integration, and tests are covered. It illustrates adding customers, using DataTable, and creating a parameter type. Overall, it … | Continue reading
This blog introduces Cucumber, a tool for Behavior-Driven Development (BDD) in Java applications. It covers the project setup using Maven, writing scenarios in GWT notation, implementing application logic, step definitions, adding extra scenarios, using tags, and generating repor … | Continue reading
The blog introduces MapStruct, a tool that simplifies mapping code generation between different object models. It explains MapStruct's features and prerequisites, and demonstrates mapping between DTO and domain models using the Spring Boot project. The blog also covers the creati … | Continue reading
This blog guides you on creating Tweets from a Java application using the Twitter API v2. It covers setting up a developer account, creating a project and an app, authorization using OAuth 2.0, and creating the Java application with necessary dependencies. Finally, it explains ob … | Continue reading
When building a Spring Boot application, adding validation is crucial for input handling. By utilizing the Jakarta Bean Validation specification, along with the Hibernate Validator, you can enforce input restrictions in both Controller and Service. By adhering to OpenAPI specific … | Continue reading
Structurizr is a tool that helps visualize and maintain software architecture diagrams as code. It provides features like version control, error checking, and reviews. To create a system landscape, Structurizr can be used with DSL or Java, but it requires careful setup and involv … | Continue reading
Structurizr offers a code-based approach for creating and managing C4 model architecture diagrams, addressing common challenges with traditional diagramming tools. It supports easy tracking and visualization of diagram changes through version control. This blog covers installatio … | Continue reading
In this blog, the implementation of Retrieval Augmented Generation (RAG) using Weaviate, LangChain4j, and LocalAI is explored. The setup involves embedding documents in Weaviate, performing semantic searches, creating prompts, and using a local Large Language Model (LLM) to extra … | Continue reading
This blog post introduces Weaviate, a vector database, and explores using it for semantic search. It explains the installation and connection to Weaviate, embedding documents, managing collections, semantic search, and exploring collections. With improved data structure and vecto … | Continue reading
This post delves into the process of embedding documents for semantic search, using examples to demonstrate its impact and methods for improvement. The author analyzes the influence of the source data and its embedding on search results, primarily using two Wikipedia documents on … | Continue reading
This blog post explores the use of LangChain4j and LocalAI for chatting with documents, including prompt engineering techniques. Five questions are initially asked and answered without documents, revealing inaccuracies. Documents are later incorporated, resulting in mostly correc … | Continue reading
This post discusses integrating Large Language Model (LLM) capabilities into Java applications using LangChain4j. It covers using LocalAI, provides examples, and explores chatting with documents. It emphasizes the need for continuous technology updates. Overall, it highlights the … | Continue reading
In this post, you will take a closer look at LocalAI, an open source alternative to OpenAI which allows you to run LLM’s on your local machine. No GPU is needed, consumer grade hardware will suffice. Enjoy! 1. Introduction OpenAI is a great tool. However, you may not be allowed t … | Continue reading
In this blog, you will learn how to monitor a Spring Boot application using Ostara. Ostara is a desktop application which monitors and manages your application. Enjoy! 1. Introduction When an application runs in production (but also your other environments), it is wise to monitor … | Continue reading
The 19th of September 2023, Java 21 was released. Time to take a closer look at the changes since the last LTS release, which is Java 17. In this blog, some of the changes between Java 17 and Java 21 are highlighted, mainly by means of examples. Enjoy! 1. Introduction First of al … | Continue reading
In October 2023, I visited Devoxx Belgium and again it was an awesome event! I learned a lot and received quite some information which I do not want to withhold from you. In this blog, you can find my takeaways of Devoxx Belgium 2023! 1. Introduction Devoxx Belgium is the largest … | Continue reading
Are you also struggling keeping the documentation of your Spring configuration properties in line with the code? In this blog, you will take a look at the Spring Configuration Property Documenter Maven plugin, which solves this issue for you. Enjoy! 1. Introduction Almost every S … | Continue reading
In this blog, you will take a closer look at Podman Desktop, a graphical tool when you are working with containers. Enjoy! 1. Introduction Podman is a container engine, just as Docker is. Podman commands are to be executed by means of a CLI (Command Line Interface), but it would … | Continue reading
Do you also get lost in the configuration annotations of Spring Boot and how to use them? In this blog, you will take a look at the configuration annotations, what they mean and how you can apply them in your code. Everything explained by means of examples. Enjoy! 1. Introduction … | Continue reading
In this blog, you will take a look at Podman Compose. With Podman Compose, you can use compose files according to the Compose Spec in combination with a Podman backend. Enjoy! 1. Introduction A good starting point and a must read is this blog provided by RedHat. In short, Podman … | Continue reading
In this blog, you will learn how to use Podman with the built-in equivalent for Docker Compose. You will learn how to use Podman ‘kube play’ and how to deploy your Podman Pod to a local Minikube cluster. Enjoy! 1. Introduction First reactions to the short intro will be: “you need … | Continue reading
At many places you can read that Podman is a drop-in replacement for Docker. But is it as easy as it sounds? In this blog, you will start with a production-ready Dockerfile and execute the Podman commands just like you would do when using Docker. Let’s investigate whether this wo … | Continue reading
In this blog, you will learn how to backup and restore a PostgreSQL database. Enjoy! 1. Introduction Some time ago, I needed to backup a PostgreSQL database from a production server in order to be able to fix a problem which was difficult to reproduce in the test environment. It … | Continue reading
In this blog, you will learn more about JHipster and how it can help you with developing modern web applications. Enjoy! 1. Introduction JHipster is a development platform which helps you to quickly set up an application. It goes beyond setting up a project structure: JHipster wi … | Continue reading
How come that some people have a hard time finishing a small number of tasks while other are able to do a lot of work in a limited amount of time? It all has to do with how you manage your time. If you can do so effectively, you can do a lot more than […] | Continue reading
In this post, you will learn how to create a Docker image for your GraalVM native image. By means of some hands-on experiments, you will learn that it is a bit more tricky than what you are used to when creating Docker images. Enjoy! 1. Introduction In a previous post, you learne … | Continue reading
In this blog, you will learn how to build a GraalVM image for your Spring Boot application. Following these practical steps, you will be able to apply them to your own Spring Boot application. Enjoy! 1. Introduction Java is a great programming language and is platform independent … | Continue reading
In this blog, you will learn the basics of Ansible Roles. With Ansible Roles, you can reuse Ansible content you create and share them with other users. You will learn about Ansible Roles step-by-step by means of examples. Enjoy! 1. Introduction In the three previous Ansible posts … | Continue reading
A Software Bill of Materials (SBOM) is getting more and more important in the software supply chain. In this blog, you will learn what an SBOM is and how to build the SBOM in an automated way. Enjoy! 1. Introduction An SBOM is a list of software components that makes up a softwar … | Continue reading
In this blog, you will learn how to setup a Maven multi-module project which consists out of a Spring Boot backend and a Vue.js frontend. The application itself will not be created, only the setup of the project is covered in this blog. Enjoy! 1. Introduction Many applications co … | Continue reading
Regularily checking for vulnerabilities in your pipeline is very important. One of the steps to execute is to perform a vulnerability scan of your Docker images. In this blog, you will learn how to perform the vulnerability scan, how to fix the vulnerabilities and how to add it t … | Continue reading
In this blog, you will learn some Docker best practices mainly focussed on Spring Boot applications. You will learn these practices by applying them to a sample application. Enjoy! 1. Introduction This blog continues where the previous blog about Docker Best Practices left off. H … | Continue reading
In this blog, you will learn some Docker best practices mainly focussed on Java applications. This is not only a theoretical exercise, but you will learn how to apply the best practices to your Dockerfiles. Enjoy! 1. Introduction Writing Dockerfiles seems easy: just pick an examp … | Continue reading