Welcome to NamasteCode!

Learn how to create a Docker image from a Java application by configuring Maven to package the app as an executable JAR, then building a lightweight container using a Dockerfile.

Learn how to implement file uploads in Spring Boot, configure size limits, and handle potential errors gracefully using Thymeleaf and Spring MVC.

This tutorial explains how to use the RestClient API in Spring 6.1 for making HTTP requests. We cover setting up and customizing the RestClient, handling requests (GET, POST, PUT, DELETE), and provide an example of using it with the OpenAI API. We also discuss error handling. By the end, we’ll know how to effectively use RestClient in our projects and understand its advantages over RestTemplate.

This guide explains how to create a Retrieval-Augmented Generation (RAG) chatbot using Spring AI and Vaadin. It covers project setup, application configuration, backend and frontend development, document parsing with TikaDocumentReader, embedding generation with OpenAI, and storage in PostgreSQL using PGvector. It also shows how to build a chat interface for interacting with uploaded documents.

In this article, we explored how to configure CORS in Spring Security 6 by updating the SecurityFilterChain. We discussed both disabling CORS and setting up a custom CORS configuration to ensure your application remains secure and functional.

Learn how to use the @Scheduled annotation in Spring with cron expressions.