Questions tagged [architecture]
The high-level design and description of a software system. Architectural design distills away details of implementations, algorithms, and data representation to concentrate on the interaction of "black box" components.
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Architecture for storing generic data
(I am facing this issue with code written in Swift, but would appreciate any high-level pseudocode solution, just so that I may wrap my head around the architecture)
I need to find an architecture ...
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Client or API Gateway to perform authentication on backend?
An system called X wants to consume APIs from the backend called Y.
There's a definition from the Systems Architecture Team that states that every request from the X to Y must go through the corporate'...
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Azure Service Fabric - Designing a Calculation Engine
Suppose I have the following devices:
Device A
Device B
Device C
(...)
Also, for each device, I have the following measurements:
Measurement 1
Measurement 2
(...)
Each measurement event includes a ...
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Is layered architecture style inherently monolithic?
Overall cost and simplicity are the primary strengths of the layered architecture style. Being monolithic in nature, layered architectures don’t have the complexities associated with distributed ...
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Microservices: Is the Saga Pattern correctly applied here?
I'm trying to understand and learn how to build microservice messages the best and came up with this task for myself:
Services given:
Accounts Service
Token Service
Email Service
When a user ...
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Is it safe to make training data and labels as global variables in C?
I'm trying to make this function called walk in C. The idea is that the function takes as parameters a point in space (represented by an array), a function (pointer), and a step size / learning rate ...
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How to scale WhatsApp clone to +1 billion users using Kafka? [closed]
I am studying system design and currently thinking through the details of a Kafka-based system that supports instant messaging like WhatsApp.
Consider the following design:
Each user is connected to ...
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How can I restore an entity from the database while keeping my entities database-independent?
Background
I'm currently working on a project using domain-driven design and Dapper as my ORM. The entities are naturally slightly different than the tables in which they are stored (e.g. _id is ...
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How to improve a monthly usage quota system for an API with growing number of users?
Couple of years ago, I designed an API service which has a limit on the number of requests per month per user. To track the monthly usage of each user, I used a table called monthly_usage. The table ...
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Design of a modular application
I'm developing an application (Java) in a modular architecture. I have two approaches in mind and I'm not sure which one will be "better code" in case of maintenance and conventions.
I have ...
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Creating a big Vue 3 project with Vite and Typescript [closed]
I'm creating a vue projet with vite and typescript. I'm expecting to create some library of component and some others with only reusable utils and functions.
I would like to know what are the best way ...
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How to handle dependencies between microservices all called within one large service
We are working on a suite of Python 'services' each of which is basically an application that does some calculations based on a domain (data) model and returns the results. These services are designed ...
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ReactJS with Elasticsearch App Architecture
I want some advice regarding my architecture and hosting options.
I'm attempting to build an e-commerce site for e-books. It will use nestJS for the backend and ReactJS+Typescript for the frontend.
...
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System Design for filter and notify user
I'm currently trying to design a notification system to notify users about data that match with they interests. Today we have a similar system running in production, but doesn't have a good ...
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Is ASP.NET's default recommendation of registering dependencies in the Web project bad practice?
Something that's bugged me for years now about ASP.NET (Core) is that it's standard practice to set up dependency injection in the Web project, whether through the Startup class's ConfigureServices ...
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"Protect" published events using auth, Event driven architecture
I have a system that publishes events to a message broker, lets call that system A.
I also have system B and system C that subscribes to the "events"/messages.
My payload/message looks like ...
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Dynamic Object Abilities When Saving State
I have n classes that extends from a State class, the purpose of the State class is to manage the state of the extended classes. For each class we need to save it in the database, remove it and select ...
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Where to check preconditions in multi functions
In a library, there could exist three types of functions. The first are those which are visible to the user i.e. their declarations are installed in the library's include directory. The third are ...
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Designing a Feed and Notification system in MongoDB
I'm developing a NodeJS API that will be consumed, for now, by an Android app.
I need 2 important things here: a News Feed and a Notification system. And I need it to be scalable.
I'm using ...
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How to deal with overlapping domains?
I'm a Java developer and I'm try to separate my code to packages (modules, services, whatever the chosen unit of functionality is). Let's say I'm creating a system that tracks employees and the ...
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Application Horizontal and Vertical Scaling
I'm hoping the experienced Java developers here can share some insight about this problem we have been trying to solve for so many months.
We're currently building a Java web application that uses ...
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Capture a time-ordered sequence of item-level modifications via events when using Amazon Aurora
I'm designing a small platform based on a series of event-based micro-services. The persistence storage I'm targeting is (the managed) Amazon PostgreSQL (Amazon RDS for PostgreSQL) — although I can go ...
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Where should I implement Ports with Hexagonal Architecture?
I have been doing some research on the Hexagonal/Ports & Adapters architecture. For the most part, it makes a lot of sense. My initial understanding was that "Driver Ports" were to be implemented ...
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Clean Architecture Dependencies
I'm thinking about adopting the clean architecture.
The main thing in this architecture, as I understand it, is the dependency flow from top to bottom. So the first thing that I asked myself is: what ...
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Clean Architecture and MVC controllers + entities
In Uncle Bob's clean architecture, why can't MVC controllers call entities directly? It seems like since the controller depends on the inner layer, they should be able to call entities when needed. If ...
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How can I track the status of multiple messages in asynchronous processes?
Let's say I've a sendMessage endpoint. This endpoint looks at configured message destinations and then puts 1..N messages into a queue (e.g. {userId: 3, type: SMS, trackingID: X} and {userId: 3, type: ...
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Model variations depending on requirements - naming and placement
Let's say there is an Item model. Depending on requirements in a given ViewModel (WPF with MVVM) I will need different things.
For example in some cases I would need model to have 3 properties: Number,...
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Confusion in UML 2 state chart design for a CAN bus data logging sensor
I have the following requirement to design behavior of a software component for logging sensor, which writes data to SD card a:
Datalogging sensor can write data to a FAT16-formatted SD card that is ...
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How to avoid side effects in complex code
Our team is working on software that does a lot of calculations, inputs are quite immense structures and outputs are calculated data for the GUI (around 10 tables, warnings, and other messages ...
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Multiplayer FPS Architecture
I'm creating a multiplayer game and have been having some trouble creating a good architecture for the server side.
So far on the server we store a list of player which are the actively connected ...
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How important is it to clearly understand requirements and architecture before starting to code? [closed]
Whenever possible I have been requiring an understanding of the requirements and architecture for the next scope of work before starting to code.
Sometimes due to schedule pressure on larger projects ...
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Implementing paging with multiple data sources
I have multiple data sources that I need to search across and return back to the client (web app).
For example the sources are:
an elastic search index
a sql database
Is there an efficient way to ...
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Are there any guidelines for calculating hardware requirements in a containerized environment?
At an architectural section of an interview I was asked to produce hardware requirements for a certain system I designed. It was a microservice-based system which runs in Kubernetes, Openshift or any ...
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Clean Architecture : Application State
Given the following design from clean architecture in which layer would you put overall application state?
In each state a subset of use cases are allowed to be invoked. For example if application is ...
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"Select All" in Table is now sending too much data to Server via API - Alternative Ways to Send to Server?
Outline of the current architecture of our web app outlining the issue I'm seeing
Client-side app is React, talking to a server running the Play! framework via an API.
On the page is a table that ...
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Selecting a large set of information from a database
So this is a topic I have never really tackled, so bare with me as I try to describe my issue and the scenario.
I have an API endpoint in my service that sends emails to a bunch of users. The set of ...
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In a layered backend architecture is the repository/manager part still relevant? [duplicate]
We all know that in a layered backend architecture we have the Controller (or view) > Service > Repository (or Manager)
The Repository part is the part that retrieves and updates the DB.
But now ...
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When to create a nuget package vs creating a web api
As our devs are writing internal applications, often times we need to share code. There are various ways to do this, but it usually comes down to creating a nuget package on a shared server or hosting ...
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Is it correct to use Lombok in a domain object?
I'm starting the refactoring of a legacy app in favor of having a more organized structure, I chose to go with hexagonal architecture since I have lots of well-defined ports and adapters, my use cases ...
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Microservices: Non-query calls from an API Gateway in the API Composition fashion
In a microservice architecture, it is common for an API Gateway to perform API Composition (providing CQRS is not used) for queries to multiple services to combine data to make it ready for a front ...
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Pattern for endpoint that routes requests?
I am building a service that will push notifications to many other services. It has a couple of different notification types that each consumer may care about, but likely will not care about all of ...
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REST API design - Categorised response objects - All, Sub, Dub movies paged response
I am having trouble deciding what is the best way to implement a REST API which does the following:
When page gets loaded, it displays a list of Movies and above is a category selector tab (ALL, SUB, ...
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How to use external validation libraries for entities in a "clean" architecture?
I would like to make use of a external library to parse the core domain entities. Doing this in a naive way it would look like the following:
import { z } from 'zod';
const Audience = z.object({
...
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Designing a scheduled based system using Node.js
Just for the example:
I have a system which needs to fetch social media timeline on a specific time interval based on user preferences.
Let's say we have user A, B, C, and so on.
Let's say again we ...
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Is it secured to accept and execute user provided CURL commands
Assume you have to figure out a dynamic way where the user can provide an API call to hit in the backend
for example, user to provide a webhook to call on his end server
So, An idea for users to ...
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Component based architectures in JS / PHP: what indicators suggest that a UI element ought to be written as an importable component?
N.B. Several months after initially asking this question (and not coming up with any satisfactory answers) I am now learning to use HTML Custom Elements / WebComponents. It seems the same question ...
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Criticism and disadvantages of dependency injection
Dependency injection (DI) is a well known and fashionable pattern. Most of engineers know its advantages, like:
Making isolation in unit testing possible/easy
Explicitly defining dependencies of a ...
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Howto design a Rest-Client in c# the right way?
apologies, if my question is to trivial. But i after doing some research i couldn't find an appropriate answer to this seemingly simple question. As a developer with some experience, i know that i ...
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How can i handle really long-term running tasks?
Im not dealing with a x minute task that can use an message queue and some workers to be done. Lets say that i have an cctv camera that capture 24/7, but can be stopped or started again via Web API ...
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Where to create repository instances?
I've several repositories. To make them testable, I add the ORM session in the constructor.
class Repository:
def __init__(session):
self.session = session
def save(object):
self.session()...
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