Author: Natan Ferreira

I am a seasoned Full Stack Software Developer with 8+ years of experience, including 6+ years specializing in Java with Spring and Quarkus. My core expertise lies in developing robust RESTful APIs integrated with Cosmos Db, MySQL, and cloud platforms like Azure and AWS. I have extensive experience designing and implementing microservices architectures, ensuring performance and reliability for high-traffic systems. In addition to backend development, I have experience with Angular to build user-friendly interfaces, leveraging my postgraduate degree in frontend web development to deliver seamless and responsive user experiences. My dedication to clean and secure code led me to present best practices to my company and clients, using tools like Sonar to ensure code quality and security. I am a critical thinker, problem solver, and team player, thriving in collaborative environments while tackling complex challenges. Beyond development, I share knowledge through my blog, NatanCode, where I write about Java, Spring, Quarkus, databases, and frontend development. My passion for learning and delivering innovative solutions drives me to excel in every project I undertake.

What is Connection Pool?

Connection Pool is very important for improving the response time of applications. To discuss connection pool, it’s important to understand how database connections work in an application. Let’s use the example of a web application, an API. Without Connection Pool A request was made to the application to fetch some information, and in this example,…

How to use Qualifier in Quarkus?

Imagine the following scenario where there are multiple implementations for the same interface, and when using dependency injection, the software needs to understand which implementation to use. Let’s illustrate with an example to understand what the problem is and how to solve it. Website Diagram: https://refactoring.guru/ In the example, we will have a delivery system that…

What is Dependency Injection?

To understand, I believe the best way is through an example. Let’s take a look at a simple delivery system. It’s not a complete system; it’s something didactic and simple to illustrate. Website Diagram: https://refactoring.guru/ In the example, we will have a delivery system that can be done by truck or ship, where there is…

How to create a Custom Annotation in Quarkus Framework?

It’s important to perform validations in the system. There are dependencies available for this with a lot of ready-made solutions. For example, in the case of Quarkus, we can use Hibernate Validator, which provides us with some annotations to solve common problems. However, if it’s necessary to perform a validation for which there is no…

What is Data Binding in Angular?

It’s a way of communication between TypeScript code and HTML template. Let’s see an example below. I created a component called “user”. We have a variable that stores the value of the “username” and a method that resets this value, it’s a method triggered by a click event in the HTML template. In the HTML…

How does the Set interface work in Java?

The Set interface inherits from the Collection interface. There are several implementations of the Set interface, such as HashSet, LinkedHashSet, and TreeSet, each with its own characteristics. Unlike the List interface, we cannot access an element by index in a Set, but it is possible to iterate over the elements. We will see some usage…

What is Sonar?

It’s a code analysis tool that helps in writing clean and secure code. Writing clean and secure code is a challenge. While manual code reviews are an option, leveraging a code analysis tool like Sonar is an excellent idea. This allows us to maintain clean and secure code, gaining several advantages: Some companies that use…

How does work Deferrable Views in Angular 17 ?

In previous versions of Angular, to use lazy loading it is necessary to specify modules in the routes using loadChildren.This behavior can be observed in the documentation itself. Below is code taken from the documentation. In the new version of Angular 17 we can use Deferrable Views, so we can do lazy loading. Practice Let’s…

How does work New Control Flow Syntax in Angular 17 ?

Angular 17 has undergone significant modernization, introducing new syntax, and features, and achieving better performance. Notably, they made substantial transformations. In this post, we will focus on New Control Flow Syntax. The Angular 17 introduced the @if, @for, and @switch syntax. Let’s explore each one. @if block conditionally The @if block conditionally displays its content when its condition expression…

How does work Server-Side Rendering (SSR) in Angular 17 ?

Angular 17 has undergone significant modernization, introducing new syntax, and features, and achieving better performance. Notably, they made substantial transformations. In this post, we will focus on Server-Side Rendering (SSR). SSR Now, when creating a project, there’s a straightforward option to enable SSR. To create a new project with SSR, run: To add to an…