Nico Deblauwe’s Post

🚀 Understanding the Architecture of a Web Application 🌐 In today's digital age, a well-designed web application architecture is crucial for delivering robust and scalable solutions. Here's a breakdown of the key components that make up a modern web application: 🔹 Developers & CI/CD Pipeline: Step 1: Developers use various tools to build and maintain the application. Step 2: Continuous Integration/Continuous Deployment (CI/CD) ensures automated testing and deployment, enhancing productivity and reducing errors. 🔹 User Requests & Load Balancing: Step 2a: User requests are routed through a load balancer to distribute traffic evenly across servers. Step 2b: DNS (Domain Name System) helps in translating domain names to IP addresses, guiding user requests correctly. 🔹 Content Delivery Network (CDN): Step 4: A CDN helps in delivering static content efficiently by caching and serving it from locations close to the user. 🔹 Web App & Backend Servers: Step 3 & 5: Web application servers handle the front-end logic, while backend servers manage the business logic and interact with databases. 🔹 Database & Caching: Step 6: Databases store essential data, while caching solutions like Redis speed up data retrieval. 🔹 Full Text Search & Workers Nodes: Step 7 & 8: Full-text search engines enhance data search capabilities, and worker nodes handle background tasks. 🔹 Monitoring & Alerts: Step 9 & 10: Logging and monitoring tools help in maintaining the health of the application, while alert services notify teams of any issues. ✨ This architecture ensures that web applications are scalable, reliable, and performant, providing a seamless experience for users. Feel free to connect and share your thoughts or ask questions! 📬

Reading parts of the incredibly important dissertation by Fielding, seems timeless from Architectural Styles and the Design of Network-based Software - "Fielding’s method of identifying desirable system-level properties (like availability, performance, simplicity, modifiability, etc.), as well as a recommended set of constraints (client-server, statelessness, cacheability, etc.) selected to induce these properties, is still, more than two decades later, a valuable way to think about and design software that needs to be stable and functional over time." - Restful Web API patterns and practices cookbook 

how does Web work ? here is some of the history of Rest APIs on which current WWW is founded: Roy Fielding introduced the REST (Representational State Transfer) architectural style in his doctoral dissertation titled "Architectural Styles and the Design of Network-based Software Architectures" in 2000. This dissertation, which he completed at the University of California, Irvine, laid out the principles and constraints that define REST. RESTful APIs, which adhere to the principles outlined by Fielding, focus on creating scalable, stateless communication between clients and servers using standard HTTP methods (such as GET, POST, PUT, DELETE) and representations (such as JSON, XML). Fielding's work has had a significant impact on how web services and APIs are designed, emphasizing simplicity, scalability, and interoperability. Many modern web APIs and services are built following RESTful principles, allowing for greater flexibility and ease of integration across different systems and platforms.

Overusing useState to store data from props may result in a stale UI. When a prop holding required data already exists, applying the prop directly allows the component and its parent to naturally sync data and re-render together, yielding a consistent, up-to-date UI/logic. Storing a prop's data in a state variable means having more local state to manage via the state setter to generate the desired UI/logic. The intuitive syncing between the two components is therefore lost. Even worse, useEffect may have to step in to simulate the "natural syncing" relationship, increasing the component's internal complexity. In brief, state variables and props are two parallel ways to achieve a desired UI and logic. Redundantly setting props as state variables can stand in your way. #react #frontend #webdev #state #props https://lnkd.in/gmgnGW4f

Hey everyone! How's it going? Today, I'm diving into a super interesting and relevant topic that I've been working on a lot lately: multi-tenant architecture. Ever heard of it? Basically, it's a type of software architecture where a single instance of an application serves multiple customers, called "tenants." Think of it like an apartment building: each apartment is a tenant, with its own space and privacy, but everyone shares the building's infrastructure (plumbing, electricity, etc.). Recently, I got an exciting challenge from my manager: create a system where each user's data is isolated in its own schema within the database. In other words, each new tenant gets its own separate schema. This task has been both challenging and motivating, as it involves dealing with the complexity of managing tenant creation in the background (a topic for a future post!). After all, each new tenant requires applying database migrations, and with a large number of migrations, this can lead to timeout issues if done sequentially. To illustrate the multi-tenant concept in a practical way, I put together a simple project as a case study, using Express and Sequelize. You can check out the code on my GitHub: https://lnkd.in/gP_RQGpA. This way, you can get a more concrete idea of how this architecture works in practice, in addition to my explanation. I'm also posting the link to my medium account: https://lnkd.in/gUqtSiGk Feel free to explore the code and learn more about this solution that's so important in today's computing world, especially in the SaaS realm.

🔥 𝟰 𝗥𝗲𝗮𝘀𝗼𝗻𝘀 𝘁𝗼 𝗟𝗼𝘃𝗲 𝗖𝗹𝗲𝗮𝗻 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 🛠️ Some software systems are easy to change, maintain and scale. Others are a tangled mess feared by developers. What separates one type of system from the other? ↳ 𝗖𝗹𝗲𝗮𝗻 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 Here are 4 compelling reasons to adopt it: 1. 𝗜𝗻𝗱𝗲𝗽𝗲𝗻𝗱𝗲𝗻𝗰𝗲 𝗳𝗿𝗼𝗺 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀: Clean Architecture doesn't tie you to specific tools or frameworks. This allows you to swap out database ORMs, web frameworks or libraries without impacting the core business logic. 2. 𝗖𝗹𝗲𝗮𝗿 𝗦𝗲𝗽𝗮𝗿𝗮𝘁𝗶𝗼𝗻 𝗼𝗳 𝗖𝗼𝗻𝗰𝗲𝗿𝗻𝘀: By segregating the system into layers, each layer has a specific job. This clarity ensures that changes made in one layer don't unexpectedly affect another. It reduces the dreaded 'ripple effect'. 3. 𝗧𝗲𝘀𝘁𝗮𝗯𝗶𝗹𝗶𝘁𝘆: The separation of concerns means you can test business rules without UI, database, or any external element. Your test will be tests fast, reliable, and focused. 4. 𝗙𝗹𝗲𝘅𝗶𝗯𝗶𝗹𝗶𝘁𝘆 𝗮𝗻𝗱 𝗦𝗰𝗮𝗹𝗮𝗯𝗶𝗹𝗶𝘁𝘆: Whether you want to introduce a new feature or change an existing one, Clean Architecture simplifies this by minimising dependencies and isolating complexities. ↳ To wrap it up, Clean Architecture is like building a 🏠 with a solid foundation. It ensures stability, eases modifications, and stands the test of time. If you're looking to build scalable, maintainable, and flexible systems, you might want to adopt Clean Architecture. If you've seen the benefits firsthand or are curious to learn more, let's connect and share insights! 🚀 #CleanArchitecture #SoftwareEngineering #SoftwareArchitecture  

Understanding and implementing Clean Architecture enhances the quality and longevity of your software projects. Clean architecture helps your application remain flexible, maintainable, and scalable, ready to adapt to future requirements and technologies. It emphasizes separation of concerns, ensuring that the business logic of an application is decoupled from its dependencies, such as frameworks, databases, and user interfaces. Principles: ▶️ Separation of Concerns ▶️ Dependency Rule: ▶️ Independent of Frameworks ▶️ Testability ▶️ Flexibility and Maintainability Benefits of Using Clean Architecture in Software Development ⭐️ Improved Testability ⭐️ Flexibility ⭐️ Maintainability ⭐️ Reusability ⭐️ Scalability Key Components and Layers 📐 Entities: domain objects containing business rules and logic. 📐 Application Core: application-specific business rules. 📐 Infrastructure: databases, web, UI, or external services. 📐 User interface Join 300,000 readers: Get the latest tech news, career resources, and expert courses for FREE: 🔗 https://lnkd.in/gTqvEJta   #CleanArchitecture #SoftwareDevelopment #ApplicationDevelopment #ComputerScience

Designing Stack Overflow Website Architecture 🚀 When it comes to designing the Stack Overflow website, the architecture plays a crucial role in its success. Let's explore the key components that make up a robust architecture for a platform like Stack Overflow: 🔹 Microservices: Decompose the system into small components 🔹 Independent Databases: Each service has its own database and utilizes caching heavily 🔹 Sharded Service: The system is sharded to optimize performance 🔹 Asynchronous Communication: Services communicate through message queues asynchronously 🔹 Event Sourcing with CQRS: Implementing Event Sourcing and Command Query Responsibility Segregation for efficient data handling 🔹 Distributed Systems Knowledge: Understanding concepts like eventual consistency and the CAP theorem In reality, Stack Overflow runs on only 9 on-premise web servers, defying the trend of cloud-based solutions. This raises the question: What defines good architecture? Is it the flashy design that impresses during interviews or the practical solution that works in real-world scenarios? Explore more about system design and coding by subscribing to our weekly newsletter for a Free System Design PDF

In the previous class of my HLD cohort, we continued with understanding how to scale the stateful components of the system, and one very important topic that came up was: How do you decide on the right partition key? The 3 important points to consider: - The cardinality of the set represented by the key you are choosing. - It should have a uniform distribution of load across the values. - Check your usage patterns and understand how your application is going to be used. At times, you cannot satisfy all 3 above in which case your problem-solving comes into the picture. You have to implement some custom solution using the same building blocks of system design. If you also want to understand systems in detail, join below: Learn HLD in-depth and from scratch: https://lnkd.in/g-VVEmSU LLD Cohort: https://lnkd.in/ga5nvShy Multi-threading Cohort: https://lnkd.in/gDdwUY6w Free system design videos covering a lot of topics: https://lnkd.in/dyVEPVqf Connect 1:1 with me on @engineBogie: https://lnkd.in/dTqdUjwd

Building APIs is not difficult. But building them the right way is hard. That's why I'm excited to share my ASP.NET Core Clean Architecture course, where I take you on a trip to learn how to build testable and maintainable APIs. Check out the course on Pluralsight! https://lnkd.in/ezRfRQBi #aspnetcore