All Questions

I’m currently working in C# and I’d like to write and extension method against a type. There is a small amount of repeated logic between classes surrounding JSON deserialization, using the ...

The below ERD is taken from a professional architecture reference, however I have a concern in the relation between Customer and Invoice, I believe that relation between Customer to Order , and Order ...

I'm struggling on designing a solid architecture for my project. In particular, I don't know how to handle the communication between the models and the controllers. My goals are: Following the ...

Lets say we have an Webserver-Framework and a Database-Framework, and now i want to configure that Webserver and the Database, then it could look like the following class Start { public static ...

I am trying to adpot a TDD process. I am a bit confused when it comes to testing an Api. I know for sure that the status and the response should be tested. But I am thinking if whether or not I should ...

My customer decided to have an automatic nightly build based on develop branch. We usually make a feature branch (and if it is necessary we provide a release compiled manually on that branch) and when ...

I have some code and in it there are functions which can be run in one of two modes (in my case server mode and local mode). For example, most functions look something like this: def path_join(...

It's clear that an entity should never be in an inconsistent state; if a change would violate an invariant, a domain object should reject the change. But what if it's left in a valid, but ...

We're currently developing a product which will have a Web version and a Mobile version. At the moment, the plan is to have identical features on both of these. From a tech perspective, there is an ...

I am confused with wording used to describe UpCasting/DownCasting compared to wording used to describe level of modules. Imagine two classes: public class Human { } public class Doctor : Human { } ...

I have recently learned about the not-well-known and not-widely-used annotation @RepeatedTest that, as the name implies, repeats the very same test n-times. Baeldung provides a short guide to this ...

I will describe the problem in a typical example Todo Application. The user can have many TodoList. A TodoList could have many Todo. The use case is "Add Todo to the TodoList". In this case, ...

I am using Domain-Driven Design with Railway-oriented programming as an exception handling method. Every value object will not throw an Error, but return a Result type to indicate if it failed or ...

I was searching about simulation of artificial intelligence, machine learning and subjects alike and saw the news that some startups around of the world are using analog computers to simulate ...

To date, we have implemented a multi-repo approach in which each project, or for larger projects, each tier, has its own repo. Code is written in Typescript, Javascript, C#, PowerShell and T-SQL. ...

I am in two minds about sharing client / server errors codes. We are writing both ends of the system, if our API was external this would not be possible, but that requirement is very unlikely. So an ...

As I understand, most of the business logic is stored in the value objects as constraints, like the price cannot be less than 0. But I have a problem where the value object depends on another value ...

On this book (Ian Sommerville, Software Architecture, 10th Edition, ISBN: 9781292096131), the following architectural patterns are presented (Chapter 6, 6.3, p175): MVC Layered Client-server ...

(This question is inspired by the SO blog entry Fulfilling the promise of CI/CD and this old question of mine: Why is it wrong to comment out code and then gradually remove it to keep track of what I'...

I want to adhere to the best practices and obviously encrypt the data sent to me by user. And I also want to provide the full-text search feature to the user (user can only search their own data, if ...

I have a function that performs a task which can either be performed immediately and without any blocking or it can only be performed after some delay. The caller of that function shouldn't need to ...

Let's say I have a function in a class with the following signature: int fun(int x, int y,std::function<int(int, int)> funArg) The output depends on the operations done in funArg. My question ...

If I have an instance of an aggregate, and that aggregate has, for example, different related contacts, then I should be asking the aggregate who its contacts are. Pretty standard. That pattern can be ...

I have a service that uses a package which is basically just a wrapper around an ElasticSearch index. I had to update the index as new data is added on a yearly basis. The source of the data needs to ...

I would like to ask a question about OAuth2 with an external identity provider. Assume a scenario with the following roles: Client A, Resource Server B, Identity Provider C. Furthermore assume that ...

I want to specify in a BMPN model that a workflow starts whenever a specific service outside tells me to. What standard BPMN symbol shall I use for this? Think of it as a company wants to start a ...

I wrote a prioritized/weighted left shuffle algorithm (the code is copied from my open source C# project Fluent Random Picker). What does that mean? You've got some values and each of them has a ...

I use the controller to extract data from a request and Use Cases/Interactors to validate the data. But can I use the controller to extract and validate the request data?

I'll be developing web application (most probably an Express.js REST API) that will include user management, device management by users. There will be users which will sign in and log in to the system....

I dont exactly know, how to handle the problem, where one class uses shared pointers but I want to call its method from inside other class via this pointer. class Bar { public: Bar() = default; ~...

I'm learning and trying TDD recently, and I constantly encounter a situation when I need to ditch my current test because it's too broad. I don't know how to deal with it. To be more specific, let's ...

Suppose I have two threads, A and B. A is waiting for input, while B is waiting to be executed. All other CPU cores are busy with CPU-bound tasks. What will happen to A?

I have seen a common design pattern where there will be a "lookup table" in the database like this: Color ColorId ColorName 1 Blue 2 Red 3 Green with a foreign key constraint on other ...

I face a problem in understanding how this situation can be traduced to an ER diagram. So I have an entity, let's call it car, and then, there are another entities, that are a type of car. For example,...

I will describe my problem with a very typical example, an e-commerce application. Says we have to manage Products, and we have 2 bounded contexts Sales, and Warehouse that store the product ...

I have a classical one producer - multiple consumers queue, each item can be processed independently. On rare occasions (<1%) there can be multiple queue items related to the same object the ...

I am in the design phase of a project and I am having some trouble finding a solution that can perform queries efficiently with PostgreSQL backend Say, there exists an item and each item has fields ...

I have a memory pool class that manages memory objects of fixed sizes, a bit like a primitive malloc() that can only return memory blocks of a few predefined sizes and unlike malloc() is guaranteed to ...

I'm dealing with an application that does the following: we have a microservice running on EKS called by jobs that pull XML data off an external system. The data volume can be fairly large (700MB-1GB ...

I have two Visitor classes in my code Visitor1 and Visitor2 that execute functions on the classes ElementA and ElementB (both implement the interface Visitable that defines accept(Visitor)). I do not ...

I need some help with my authentication design. Happy to share any code as needed... Overview I have implemented the Google Sign-in (new web implementation here) button in my client web application. ...

I recently joined a new project that is written in java. The project has been worked on for a few years by different developers, so there are many different code styles across different classes, and ...

I wonder how to design a good plugin architecture in C++/Qt. The main concern I have is about dependency injection vs globals when it comes to the core components. Plugins should have access to ...

Edit #1 I believe that I misrepresented my intent when writing this question by focusing too much on the issues that have arisen from our misuse/misunderstanding of locks. I am making this edit to try ...

I have a method that depends on object creation from a different class, as well as some helper methods that come from a third class. The specific needs of this project mean that the logger is required ...

I'm writing a parser for a markup language in haskell, and a finite state machine fell out of my ideal API. I have code that looks a bit like this: Token = BoldWord String | Word String | ...

We have REST endpoint that that works like this Retrieve payload from request Generated unique id for payload and order_status and enrichment_status to PENDING Store payload in Redis Perform request ...

I have a database that keeps a temperature readouts, which are being added - let's say - every minute: +----+---------------------+-------------+-----------+ | id | timestamp | temperature | ...

I'm attempting to create a project to increase and enhance my coding skills, and I've lately migrated React to Nextjs. I've noticed that NextJs' main point or strength is rendering; Could someone ...

I've been refactoring guard statements for my project to simply use a custom Ensure class with 2 methods. Some methods require multiple null checks and I implemented a guard method that simply accepts ...