A Deep Dive into Unit Testing: Classic vs. London Schools Unit testing is a fundamental practice in software development, allowing developers to verify the correctness of individual components in isolation. This article explores the theory behind unit testing, presents practical examples in Python, and contrasts the classic and London schools of unit testing, using a complex example for a clear comparison.
The Example: Order Processing System Overview Our example is an Order Processing System that includes the following components:
The Twelve-Factor App The Twelve-Factor App methodology is a set of best practices for building modern web applications. It was developed by Heroku to help developers create applications that are portable, resilient, and scalable. This methodology is particularly useful for applications deployed as services and follows twelve principles that guide the development, deployment, and maintenance of web applications.
I. Codebase One codebase tracked in version control, many deploys
A twelve-factor app is always tracked in a version control system such as Git, Mercurial, or Subversion.
DRY vs WET Code: A Comparative Study with Python and Go Introduction The DRY principle, which stands for “Don’t Repeat Yourself,” is a fundamental concept in software development aimed at reducing repetition of software patterns, replacing it with abstractions or using data normalization to avoid redundancy. This article provides an in-depth look at the DRY principle, its implementation in Python and Go, and its application in software design using UML diagrams.
Load Balancer Algorithms: A Comprehensive Guide Load balancers play a crucial role in distributing network traffic across multiple servers. The efficiency of a load balancer largely depends on the algorithm it uses. This article provides a detailed explanation of common load balancing algorithms, their pros and cons, and suitable use cases.
1. Round Robin Explanation: The Round Robin algorithm distributes requests sequentially to each server in the pool.
How it works: Request 1 → Server 1 Request 2 → Server 2 Request 3 → Server 3 Request 4 → Server 1 Request 5 → Server 2 .
Load Balancers: Optimizing System Performance and Availability Introduction In today’s technology-driven world, where applications and websites must handle millions of simultaneous requests, load balancers have become crucial components of IT infrastructure. These devices or software efficiently distribute incoming traffic among multiple servers, enhancing the performance, availability, and reliability of applications.
What is a Load Balancer? A load balancer is a device or software that acts as a “traffic director” for a network.
API Gateways: The Cornerstone of Modern Microservices Architecture 1. Introduction In the rapidly evolving landscape of software architecture, microservices have emerged as a dominant paradigm for building scalable, flexible, and maintainable applications. As organizations transition from monolithic structures to distributed systems, the complexity of managing communication between services, clients, and external APIs has increased exponentially. This is where API Gateways come into play, serving as a crucial component in modern software ecosystems.
