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The Concept of Stateful and Stateless Applications

We often hear the terms "stateful" and "stateless". Understanding these concepts has a critical importance since it is one of the most essential questions when designing and architecting software applications. In today's blog post, I wanted to talk about these two very basic concepts. As the simplest definition, stateful application means an application which remembers the past, similarly, stateless application means an application which doesn't remember the past. The state we have been talking about might be saved in a database, a file on the disk, a cookie in a browser etc. As an example, consider an e-commerce website. When…

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Azure Active Directory Login with React, with C# or Java Backend

Keeping things secure is the important part of any application. As entire internet going to cloud, Azure Active Directory (AD) is one of the best possible among one of two popular options. It helps manage who can use your app and what they can do. Let's see how to set up Azure AD for a C# and Java Spring Boot backend, and a React frontend to make sure only the right people get in. First, go to the Azure portal and make a new Azure AD tenant if you don't have one yet. Then, register your app in Azure AD.…

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Unlock Faster Performance: Advanced Caching Tactics for .NET Core

In software development performance optimization is a crucial topic that cannot be undermined. One of the most effective ways to improve the performance is caching. However, caching is a double edged sword we need to very careful about when and how to use caching. So, we need to use right strategy in right place. Caching can be implemented at different levels, including memory, network, and CDN (Content Delivery Network) levels. Each level has a unique purpose and is suitable for different use cases. In this post, we will focus on memory-level caching which is simply storing the data in the…

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Containerizing a .NET Application with Docker – Step by Step Guide

Docker is a powerful tool that allows developers to package applications into containers. These containers can run on any system that has Docker installed, making it easier to deploy and run applications consistently across different environments. Containers are like lightweight, portable packages for your application, including everything it needs to run: code, runtime, libraries, and settings. I assume that you have already know what Docker is and also you have .NET and Docker installed on your machine. Don't worry, just download and then next + next. For more details and official documentation, you can visit Docker's official website and for…

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D Programming Language: A Hidden Gem

D is an interesting language. For some reason, I have an emotional connection with this language and I believe that it is the subject of the biggest unfairness story in the history of software development. To me, it is the best programming language in the market for the reasons I am going to state below. However, this language is underestimated, underrated, and despised in the programming circles because it doesn't have a strong backer. In this article I want to talk about, and give some credit to D, an underrated sibling of C++, Java and C#. The D programming language…

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Architectural Design Patterns 9 – Circuit Breaker

When designing systems, especially distributed systems, the flow of data and service requests must remain continuous. This brings us to an architectural design pattern called the Circuit Breaker. It comes from electronics. Simply, it is designed to stop the flow when something goes wrong. This prevents potential cascading failures in a system. Understanding the Circuit Breaker Pattern Imagine a scenario where a service relies heavily on another third-party service. However, that third-party service becomes slow or starts to fail at some point. Without any preventive measures, our service will keep making requests, waiting for timeouts, even getting stuck. This is…

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PHP: The All Times Survivor

Whenever a major improvement happens in web technology, whenever a new framework or a language is introduced in the web development market, PHP's death is declared immediately. I have been witnessing a recent popular belief that PHP is nearing its end due to NodeJS becoming the new "darling" of the developer community. To me, this belief is a naive statement comes from lack of knowledge on the history of programming languages since the story of PHP is the greatest survival story of the entire computer science history. Over the years, many people have declared the death of PHP against a…

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React vs. Angular: Choosing the Right Framework in 2024

"Angular or React?" has been one of the most important questions in software development for the last decade. As a developer who had worked in full-stack fashion for a long time myself, my story of frontend started with Angular but had slightly moved towards React. Since I have actively participated projects in both, I wanted to write a comprehensive comparison between these two. Let's explore the key aspects of each framework to help you make a decision, if you need to. Brief Overview: Developed and maintained by Facebook, React is a component-based library that deals mainly with the view layer…

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Remote Caching in Scaled-Out Cloud Applications: A Case Study with Redis, C# and Python

A few weeks ago, we were discussing a problem with my team mates and a colleague raised a question about a very basic distributed remote caching problem which was about an application scaled out across multiple instances, managing how data is cached can become a significant challenge. Let me take the shortcut and directly jump into the problem. Consider a scenario where you have multiple instances doing the same job and you need to cache the result of a function which takes about 30 seconds. This function's result needs to be cached to avoid redundant executions across different instances. The…

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Using SignalR with Angular

In a previous blog post, we discussed how to create real-time web applications using SignalR and React. If you have already gone through that, you would know the magic of SignalR in pushing instant updates, allowing users to receive data in real-time. In this post, we're going to apply the same concept but with Angular. Setting Up the Server with SignalR Just as a quick refresher, SignalR provides an easy method to communicate between the server and the client in real-time. We start by installing the appropriate NuGet package: Install-Package Microsoft.AspNet.SignalR The hub, as described before, acts as the communication…

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