Posts

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.

Learn to configure multiple data sources in a Spring Boot application, enabling the use of separate databases and specific data sources for Spring Data JPA repositories.

Learn how to use testcontainers in a Spring boot application when creating integration tests.

Learn how to access values defined in a properties file in a Spring Boot application. Define properties in a properties file and access them in a Spring service.

Learn how to return HTTP 4XX errors in Spring applications. Use ResponseEntity to set the appropriate HTTP status code and response body.

Learn how to configure the server port for a Spring Boot application. Set the port in the application.properties file, command-line arguments, or system properties.

Learn how to configure a Java Web Client for HTTPS requests. Secure your HTTP communication with encryption to protect user data.