Author: Sergio Lema
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Protect your Spring Boot application with JWT
The article provides a comprehensive guide on how to protect a Spring Boot application using JWT and Spring Security. It offers a detailed explanation on various aspects, including adding dependencies, encoding passwords, creating login endpoints, JWT HTTP filtering, and configuring Spring Security. It also emphasizes the importance of having protected routes and a HTTP filter…
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Implement the CRUD Operations in Angular
The article explains setting up CRUD operations in an Angular frontend for a vehicle management system, paired with a Spring Boot backend. The tutorial breaks down each CRUD operation: Read, Create, Delete, and Update, detailing how to display data using Material components, form creation for data upload, data deletion, and updating existing data. It also…
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The Hardest Bug I’ve Faced
In this article, I will describe some of the worst bugs that happen in an application. Let’s start by splitting them into two main categories: those which I can reproduce on my laptop, and those I can’t reproduce on my laptop.
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PostgreSQL’s Deadlocks
Have you ever faced a database deadlocks in Postgres? In this article, I will tell a story about the deadlocks, A Journey Through PostgreSQL’s Conundrums.
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Create an Angular Project Connected to Spring Boot
I will create an Angular project to communicate with an existing Spring Boot Backend.
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Create a RESTful CRUD Application with Spring Boot
In this article, I will show what are the main endpoint needed to have a CRUD application. I show how and explain to create those endpoints to be RESTful compliant.
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Connect a Database to a Spring Boot Application
In this article, I will connect my Spring Boot Application to a PostgreSQL database. Adding the dependencies, configuring the application and creating the entities and repositories.
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Creation of Spring Boot App and CORS Configuration
In this first article, I will start by creating the Spring Boot application and configure the CORS to be accessible by any Frontend (Angular or React).
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Can Only a Genius Be a Developer?
I’ve seen a lot of people asking if you have to be a genius to be a developer. Or if everyone can be a developer. Why do people want to be a developer?
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Java 21 is coming! What’s new?
Java 21 will be released the September 19th of 2023. But the most important, is what this version includes. String templates, Record Patterns, Pattern Matching for Switch and the Virtual Threads.
The Dev World - Sergio Lema 