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Real Time example for Chain of Responsibility behavioral design pattern

Introduction When it comes to design patterns in object-oriented programming, it is very hard to find where we can apply such patterns and what problem exactly does it solve with some real-world example. In my series of articles, I would like to cover bad code without patterns and how to apply design patterns in that properly to make better code. In this article, I have covered the chain of responsibility behavioral design pattern. Let us look into this. Definition It is the most important design pattern that falls under the behavioral category as per gang of four. It defines that “avoid coupling from the sender of a request to its receiver by adding one more object to handle the request. Chain the receiving objects and pass the request along the chain until an object handles it.” Scenario Suppose you are a Developer and you want to apply a leave request in your company. The company policy for Developer says that if leave request for 1-day team lead will handle if leave re
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How to resolve ASP.NET core web API 2 mins timeout issue

Introduction We are in the new world of microservices and cross-platform applications which will be supported for multiple platforms and multiple heterogeneous teams can work on the same application. I like ASP.NET Core by the way its groomed to support modern architecture and adhere to the software principles. I am a big fan of dot net and now I become the craziest fan after seeing the sophisticated facility by dot net core to support infrastructure level where we can easily perform vertical and horizontal scaling. It very important design aspect is to keep things simple and short and by the way, RESTFul applications are build and it is a powerful mantra for REST-based application and frameworks. Some times we need to overrule some principles and order to handle some situations. I would like to share my situation of handling HTTP long polling to resolve the ASP.Net core 2 mins issue. What is HTTP Long polling? In the RESTFul term, when a client asks for a query from the serv
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How to Resolve ASP.NET Core Key Protection Ring Problem in AWS Lambda

Introduction When it comes to server less web application design using asp.net core razor pages, we definitely need to consider a factor of data protection key management and its lifetime in asp.net core. I developed a site using AWS toolkit of ASP.NET Core Razor Pages. The main advantage of ASP.NET Core is cross-platform from where we can deploy our application in MAC, Linux or windows. I deployed my site initially in IIS Server from which I got the results as expected .but later period I decided to host my site in AWS Lambda in order to meet our client requirement. Strangely, I got unexpected behavior from my site. I just refer the cloud information Lambda Log to identify or pinpoint the case, I got the error Information like “Error Unprotecting the session cookie” from the log. In this article, I tried to explain the root cause of the problem and its solution to overcome such kind of issue. Data Protection in ASP.NET Core This is feature in ASP.NET Core which acts as repl
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Which linq method performs better: Where(expression).FirstorDefault() vs .FirstOrDefault(expression)

 Introduction When it comes to LINQ, we always have multiple options to execute the query for the same scenario. Choosing correct one is always challenging aspect and debatable one. In one of our previous articles   Any Vs Count  , we have done performance testing about best LINQ methods over .NET types. In this article, I would like to share about  Where(expression).FirstorDefault() vs .FirstOrDefault(expression) Approaches Performance testing for  Where(expression).FirstorDefault() vs .FirstOrDefault(expression) is very interesting IEnumerable<T> or ICollcetion<T>  .FirstOrDefault(expression) is better than  Where(expression).FirstorDefault() Public API To check the performance, I need some amount of data which should already available. So I decided to choose this  public api . Thanks to publicapis Public API Models Entry class using System ; using System.Collections.Generic ; using System.Text ;   namespace AnyVsCount { public class Entry { pub
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