API – Natan Code

How does Poor Man’s Load Balancer work?

Understanding the concept of Poor Man’s Load Balancer is an interesting and educational approach, especially for grasping the fundamentals of horizontal scalability using containers and load balancing. Horizontal scalability allows multiple container instances, and requests will be distributed by the Load Balancer. This model is widely used in high-demand environments. Benefits: Problems and Solutions: How…

How to build application image with Dockerfile?

Since this is a Java application, I need to use an image that can run a Java application. We need the Dockerfile and to use the OpenJDK base image. This Dockerfile is a recipe for building a Docker image that runs a Java application. Each instruction in the Dockerfile has a specific purpose. Let’s go…

How to handle exceptions in Spring?

Exception handling in APIs is essential to ensure clear and efficient communication between the server and client, preventing unexpected interruptions and enhancing the user experience. By properly handling exceptions, the API can return user-friendly and informative error messages, making it easier to identify and resolve issues. Additionally, this practice improves the application’s security and robustness,…

How do Spring IoC and Dependency Injection work?

Before discussing how Inversion of Control (IoC) and Dependency Injection (DI) work in Spring, it’s essential to understand what each of them means. If you have any questions, check out this post where I cover these two very important concepts. Spring has a container that manages Beans. Beans are objects managed by the Spring container…

How to use Rest Controllers in Spring?

When creating a REST API in Spring, it is necessary to use some annotations, as this allows us to create the endpoints. All of this is necessary because we need to follow the “Richardson Maturity Model” to maintain a REST API with a good level of maturity. If you want to learn more about the…

What is Richardson Maturity Model?

It is a model (developed by Leonard Richardson) to improve API maturity. To achieve the glory of REST, the API must have maturity levels. There are 4 levels, and next we will see how each of them works. Level 0: The Swamp of POX This level defines that the use of the HTTP protocol is…