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Latest Articles
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Python Unittest Mocking Constructors
Writing effective unit tests can be challenging, especially with mocks. The post discusses issues with mocking constructors in Python’s unittest framework, suggesting that imports be structured differently to enable successful mocking. By importing the module instead of the class directly, the @patch decorator can function correctly, allowing for effective testing.
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Debug Server Performance
In this article, I compare the performance of an application hosted on AWS and Scaleway, revealing that AWS was significantly slower despite higher resources. Through testing various instance types and configurations, they determine that the issue lies in CPU performance and instance age impacting response times. Ultimately, a better instance type was found on AWS,…
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Architecture for my Generative AI Application
In this article, I explore using AI image generation models accessed via platforms like Hugging Face but faces challenges with high GPU costs and inefficient resource management. The solution involves a web application and a backend service that auto-scales GPU usage via asynchronous messaging, ensuring resources are only used when necessary.
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Advantages and Disadvantages of Alembic
In this article, I compare Alembic to other database migration tools like Flyway and Liquibase. Alembic excels in handling parallel migrations and enforcing rollback actions but lacks checksum validation, posing risks for schema consistency. While not perfect, it offers advantages, particularly for team development, using SQLAlchemy for ORM migrations.
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Mastering Docker Compose for Local Development and Testing
This article emphasizes the importance of creating a local development environment that closely resembles production using Docker Compose. It covers setting up microservices, databases, and caching systems, while discussing necessary configurations for effective unit testing. The ultimate goal is to minimize discrepancies and enhance software development efficiency.
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Multi-Environment Configuration in Spring Boot
In this article, I talk about the importance of proper configuration in Spring Boot applications across multiple environments. By using Maven profiles, environment variables, and CI/CD pipelines, developers can maintain clean and flexible configurations. The goal is to ensure a seamless application experience whether running locally or in production, without the risk of misconfigurations.
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React Performance Tips and Tools
In this article, I discuss the importance of optimizing React app performance, placing the responsibility on developers rather than blaming users. I highlights common issues, such as unnecessary re-renders, inefficient state management, and large bundle sizes. Solutions include memoization, flattening component trees, state centralization, code splitting, and using appropriate tools for diagnosis and improvement.
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I’ve Created a RAG in Two Days
In the AI era, web developers must integrate AI into projects to stay relevant. I’ve built a Retrieval-Augmented Generation (RAG) system in two days, combining a knowledge database with an LLM. Key components included data chunking and retrieval. The project showcased AI’s ability to provide specific responses, using creative datasets for testing.
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Forms in React, with or without React Forms
Forms in web development are essential for user interaction, yet often frustrating. This content compares traditional HTML forms with React Form Components, discussing their pros and cons. Basic forms are simplistic but limited in validation, while React libraries enhance user experience with advanced features. Choose based on form complexity and validation needs.
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Build a Backend with Spring Boot in 9 Steps
Do you want to create a Spring Boot Backend? Do you want to create a website? Here are the 9 steps I follow to create a backend with Spring Boot.
Build a Microservices Architecture with Spring Cloud
Are you looking to build a Microservices architecture? To create Microservices with Spring Cloud and Kubernetes? Here are the main design patterns used in Microservices Architectures.
The Dev World - Sergio Lema 