Ralph's Blog

Xodus is a high-performance, embedded database developed by JetBrains.

This post takes a look at the caching support in Spring Boot, including setup, pitfalls, key generation, and advanced configuration options.

This article shows how to list many objects in an S3 bucket quickly.

Implementing a traditional RAG (Retrieval Augmented Generation) system using Spring AI.

Learn how to use MapTiler's JavaScript SDK to display maps and markers in your web application, including clustering and popups.

In this blog post, I will show you how to integrate JaVers into a jOOQ/Spring Boot application for auditing of object changes.

This blog post shows how to deploy a JavaScript application with PocketBase as the backend on a Debian 13 server.

This blog post shows how to develop a simple Ionic/Angular application with PocketBase as the backend.

Learn how to create a Reply Bot for Bluesky using Go that replies to mentions with AI-generated responses.

This blog post shows you how to use Pulumi to provision resources on Hetzner Cloud.

How to use ShedLock to prevent concurrent execution of scheduled methods in a Spring Boot application.

In this blog post, I will show you how to write programs in Go that post to Bluesky.

A look at Spring AI's support for Tool/Function calling.

Running the Moonshine model, a speech recognition model, in the browser with Transformers.js.

In this blog post, I will show you how to implement WebAuthn authentication with Bitwarden Passwordless.dev, a SaaS solution that provides WebAuthn authentication as a service.

In this article, I will show you how to write a Go program that generates Go code with the help of a large language model (LLM) and run this generated code in a Docker container.

Combine web search with an LLM in Go and query local models running on Ollama.

Fine-tune a small language model for SQL generation and convert it for use with Transformers.js.

Run an LLM in a web application with Transformers.js.

Use Gotenberg with Go to convert web pages, HTML, and office documents to PDF.

Use @capawesome/capacitor-app-update to detect new store versions and start the update flow.

Ship web-content updates for a Capacitor app with capacitor-updater.

Set up an AWS Batch job with GPU support using Python, Pulumi, and Poetry.

Implement a passwordless authentication system with WebAuthn in Go on the back end and Angular with daisyUI on the front end.

Build a Python AWS Lambda function with Poetry and deploy it with Pulumi.

Access OpenAI GPT-4o on Azure and Stable Diffusion on AWS Bedrock from a Go application.

In this blog post, I show you how to implement a web application with Angular that receives push notifications and a back end with Java that sends push messages.

Setting up TLS with Go in production environments

In this blog post, I'm going to show you how you can write Go programs that access Git repositories with the go-git library.

Various ways to access the Pwned Passwords database from Have I Been Pwned with Go

In this article, I show you how to install Plausible Analytics, a self-hosted, open-source website analytics application.

The second part of setting up an HTTP API back end on AWS shows you how to transform the single-user application from the first part into a multi-user application where users can sign-up and sign in.

The first part of setting up an HTTP API back end on AWS shows you how to configure Amazon API Gateway and Amazon DynamoDB and build and deploy an AWS Lambda in Go to form the back end for a simple todo web application.

In this blog post, I will show you an example of the new live query feature in Dexie.js 3.2 that enables an application to subscribe to IndexedDB queries.

In this blog post, I show you how to send and receive Protocol Buffers messages over Amazon Simple Queue Service (SQS).

In this blog post, I will show you how to write AWS Lambdas with Go and deploy them with Pulumi (Go).

In this blog post, I'm going to show you how to set up cloud resources on AWS with the infrastructure-as-code (IaC) tool Pulumi.

In this blog post, I'm going to show you how to set up TLS with a Go HTTP server listening on localhost.

An overview of the switch enhancements introduced in Java 14.

A summary of interesting small changes in the Java standard library and the language in Java 9 to 11.

A summary of interesting small changes in the Java standard library and the language in Java 18 to 21.

A summary of interesting small changes in the Java standard library and the language in Java 12 to 17.

How to install Docker and a Docker registry server on Ubuntu

How to install any Java application as a Windows service with WinSW

A closer look at Spring Security's support for upgrading password hashes

In this tutorial, I show you how to develop a web application that presents your holiday photos on Google Maps.

This blog post shows you how to integrate hCaptcha CAPTCHAs into a plain JavaScript project and Angular projects, with a Spring Boot back end.

In this blog post, we take a look at the YouTube Player and Google Maps component from the angular/components repository.

In this blog post, we take a closer look at the webSocket function from the RxJS library, a wrapper around the native WebSocket object.

In this blog post, we are going to take a look at how to send Protocol Buffers messages from an Angular app to a Spring Boot backend.