Questions tagged [architectural-patterns]
An architectural pattern is a general reusable solution related to the high level structure of software systems. For reusable solutions having a more specific scope (e.g. individual classes/components and their interactions), prefer the tag 'design-patterns'.
429 questions
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How should I implement System Design patterns in general and when to use these patterns in every aspect?
I have been learning a lot of new things lately, DevOps, Cloud Computing, Monitoring, and Security. I have been facing my problems dead on, but System Design seems to be a bit complicated. I have ...
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118
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How to implement introspection of user-defined data in my software renderer
I am in the process of writing my own software renderer. I am currently working on setting up a shader system that allows users of the renderer to create their own Vertex Shader and Fragment Shader. ...
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227
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How should domain models be designed — rich domain models with encapsulated logic vs. anemic models with separate service/util layers?
I'm learning Domain-Driven Design (DDD) and studying different architecture patterns, and I’ve come across two seemingly conflicting design philosophies around domain modeling.
1. Rich Domain Model ...
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Patterns for background apps using system tray and dialogs
I've had reasons to design an application that should 1) run in the background to show status and notifications, with 2) dialogs showing details and configuring the app through more powerful widgets. ...
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129
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Should board class handle LEDs/alarms when entering Maintenance mode, or should this be handled externally via events?
I'm designing a system that manages multiple hardware boards. Each board has a class that provides core functionality, such as:
Device enumeration
Capability enumeration (power management, polling, ...
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3
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196
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Ensuring proper initialization order in event-driven C++ applications
I'm working on a C++ system where I have a concept of a "Board" object. Each board can have services attached (e.g. UpdateService, LoggingService, etc.).
I'm trying to design how these ...
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2
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274
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Relationship between monolithic architecture and n-tier
I am confused about the relationship between monolithic and n-tier architecture (I have only analyzed 1, 2, 3 levels and tiers).
Since n-tier architecture divides the application into logical layers (...
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4
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251
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Can we consider each microservice as a “small monolith” application? [closed]
I'm just getting started with software architectural patterns.
I first analyzed the difference between monolithic architecture and microservice architecture and I had a doubt.
Below I report the ...
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2
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2k
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Refactoring a legacy codebase with a god Repository and incomplete Clean Architecture [duplicate]
I'm currently working on a large legacy project that tried to implement Clean Architecture combined with MVVM, but unfortunately didn't fully adhere to the principles.
One major problem:
The ...
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4
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1
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207
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Holding state in a service class in MVVM
In my SwiftUI app, I have a UpNextManager view model and a service class called UpNextService which contains many methods to read up next items from disk, write them to disk and much more. The service ...
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154
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LabVIEW Object-Oriented Scripting Engine
This question is for LabVIEW 2019. Highlighting that fact first because some of the "standard" object-oriented techniques like interfaces, type inference, template specialization, etc. aren'...
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In a python project, when should you use __init__.py, __main__.py, and just normal .py?
Say I am making a pdf editor app with the following structure:
├── main.py
├── 📂 drawing_functions/
├── 📂 util/
├── 📂 GUI/
└── 📂 document_handling/
Each of these folders have a collection of ...
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2
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299
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How to untangle bounded contexts after a team ownership reorganization?
This is inspired by Eric Evans' presentation about bounded contexts when doing Domain driven design.
In his presentation he presents a case where a bank has initially 2 teams that manage 2 bounded ...
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730
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Moving from 3-tier architecture to clean architecture
Generally, for a simple project: how do you move from 3-tier architecture to clean architecture? What I'm trying to do here is to get a feedback on how would the developer which understands 3-tier ...
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1
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233
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REST API with swappable backends
What would be the best way to have a single REST API but with multiple "backends" (Not sure if this is the correct terminology)? Currently we have a basket/cart API that handles product ...
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1
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220
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How to handle data when source of truth is through API
I am making a webapp that deals with money movement. All the financial actions are done through an API. For example, right now I can create an account for a user, add funds to their account, transfer ...
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Is a callback function with `this` as an argument a bad practice?
I have a class that has a callback function that gets triggered on some event. The user of the class instance is expected to do stuff on the instance itself, inside this callback function. So I am ...
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443
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What is a good architecture / design pattern for giving multiple shared attributes in different combinations?
I have a need for many different objects to have various combinations of attributes. For a demonstrative example, a flaming dog would have a dog attribute, a flame attribute, and a tail attribute, ...
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2
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177
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Allow-Rendering-Prevent-Download Architecture
I am trying to devise a simple system that, with the use of tokens, allows a specific file to be rendered in the client's browser, yet prevents the user agent from being able to download the file. ...
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What is the difference between Hexagonal Architecture and Anti Corruption Layer Pattern?
I tried searching the web but can't understand the difference/boundary between hexagonal(ports and adapter) architecture and ACL Pattern.
While hexagonal architecture talks about creating ports(...
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2
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407
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Combining Command and Visitor design patterns
Designing the architecture of a personal project, I've come up with the idea of using the combination of these two patterns to solve an architectural issue. In an MVC context, I need to implement ...
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76
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isolating user run scripts on docker without performance impact
Scenario:
We have a application (web based), in a small part of this application a users is able to create a small python script to mutate (in memory) data. Currently all of these scripts (if it is ...
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237
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Where to put the reference to Application Insights in an application designed with the Clean Architecture template?
We are implementing an application by trying to follow the Clean Architecture template for C#.
Our application is an ASP.NET core web api and we want to implement the observability for that ...
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455
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How choose between Clean Arch and Hexagonal Arch(Ports And Adapters)?
I'm studying architecture patterns and I don't understand which type of scenario is more preferable to use clean architecture or hexagonal architecture. Is there something like that? For example, &...
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4
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571
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Best practice for using read-write lock
Given a system where users can access different services through the API for conducting business transactions, I am currently working on integrating a read-write lock into the system. One approach I ...
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1
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121
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impacts on splitting web application (java) for reducing memory & compute footprint on primary user-facing app
TLDR;
what if you are tasked with taking out a feature and making it app 2 to reduce memory/compute foot print from app 1? Making an API contract between app 1 & 2 would defeat the purpose ...
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102
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By creating an architecture, it is better to have many classes that handles different scenarios, or a single one that handles all? [duplicate]
During my limited professional experience, I have been involved in microservices projects with a common structure:
The Controller takes a request and validates it using the jakarta.validation....
2
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2
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286
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How to design fault-tolerant distributed "all-or-nothing" system?
I have a system where Client(C) sends request to Server(S0). S0 then sends the response back to Client that "request received" and closes the connection. C can regularly poll S0 to check on ...
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Best practices for team development with NuGet projects in .Net
TL;DR I want to change the way our current enterprise code base is constructed to utilize NuGet packages for the inter-project references, but that seems to present some challenges when considering ...
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3
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503
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How to reconcile the fact that dependency Injection break encapsulation? (Especially when others are allowed to wire up your dependencies for you)
I was reading Martin Fowlers take on Dependency Injection, and in general have been trying to discuss it a bit online to help get rid of my own misconceptions and to understand this principle better.
...
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4
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340
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Please explain the "swapable dependency" arguments for IOC containers
I get that IOC containers can be useful to help break dependencies and allow you to test a class in isolation. I don't wish to focus on that right now, instead, I'm trying to understand some of the ...
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4
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330
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Design of API which is based on third-party implementations
I have 5 interfaces in an API component, which in its turn call an external 3d party solution provider (REST).
The goal is to make this component universal, and under the hood support multiple service ...
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144
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UI or Application layer responsibility - retrieving additional data for display
I have an application service that retrieves Order data. The service is consumed in UI, where it can be edited by users.
Additionally, the users wants to see related data such as ordered products' ...
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9
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Is it an anti-pattern to use interface for entity?
I read an article about that using an interface for an entity is an anti-pattern for these reasons:
Your interface signature is identical to your class.
There’s only one implementation of your ...
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277
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Implementing MVC in C++ with minimal boilerplate despite lack of reflection
Powerful reflection capabilities make implementing nice architectural design patterns such as MVC and Dependency Injection very simple in languages like Java and Kotlin. In particular, reflective tags ...
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673
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Centralize input validation across multiple Microservices
My company, which specializes in logistics and transportation, delegated the majority of the backend microservices to our team. All of the microservices (which our team inherited from "past ...
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1
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153
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Is RabbitMQ suitable for allowing SaaS customers to subscribe to events?
I work on a SaaS system which is generally a single-tenant environment. Customers (whom the SaaS instances are for) would like a way to subscribe to events, such as updates of certain data entities. ...
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What is the name of the approach (practice) when several unrelated entities are returned at once in the response to a request [closed]
For example, for a mobile frontend, you need to get all the data for rendering at once. The interface is divided into blocks, in which there can be both blocks with a catalog (categories) and other ...
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1
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78
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How to handle concurrently caching expensive request data in postgres?
I have a kubernetes deployment which is fielding expensive (but cache-able) requests, let's say a website scraping service (not really) which takes about 15 seconds to scrape a website. In my backend ...
3
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2
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300
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In the usual "3-layer" architecture pattern, where would one best create dynamic, user-readable strings?
I've been trying to build this (principally desktop, but could eventually be turned into a cloud app) document editor program for a while and have it laid out using the broad principles of the 3-Layer ...
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309
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Pattern for Nuget Package (Abstractions, DepedencyInjections, etc.)
I've been interested in following what other successful libraries are doing with their nuget packages. Unfortunately, I can't seem to find any materials to read online and I don't even know what to ...
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Handling a single event as broadcast and round-robin depending on service
I have Service A that publishes an event to RabbitMQ. I have two instances of Service B that will use the event to write to its database. I have two instances of Service C that will send the event ...
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120
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In the state pattern, what happens when the action doesn't depend only on the state?
I have some doubts about the state pattern, but I think it is better to ask one question at a time, so it is easier to focus on the answer.
The state pattern establishes which actions can be performed ...
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330
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two diffrent database in unit of work
I will explain my problem in the form of an example.
Suppose we want to use both databases in a transaction.
Data is edited in database 1 (for example, Postgres) and then added to database 2. Finally, ...
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2
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534
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Using multiple databases in a bounded context
Sometimes we have to use multiple databases in one project
with the intentions of:
Denormalizing data or read models
Using the advantages of that database (technology)
There has been a lot of talk ...
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2
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588
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Workers and orchestrator
I’m working on a system where we have several scheduled long running operations.
In our case this is website crawls that we perform for customers. The current setup is pragmatic where we have one ...
1
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2
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152
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JavaScript: Change prototype chain to morph objects from a deserialized JSON to business objects
This post assumes, that dtos on the UI side (SPA) could be viewed as business objects in almost all cases - except that the business logic is missing. I'm fully aware that a dtos first responsibility ...
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3
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821
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What is the difference between these two MVC diagrams?
I want to understand what is the main difference in these two diagrams when it comes to the Model-View-Controller pattern. If there is a difference, how should I choose to construct my program? What ...
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Most relevant objectively-quantifiable reason to choose to use an object method vs. a function that just accepts the object as a parameter? [closed]
When writing code in a programming language that has the option of creating standalone functions vs. methods of a class or struct, what is the most relevant objectively-quantifiable reason to choose ...
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How can I prevent an object from being re-sanitized everytime it is passed as input to a function?
Suppose that I have a class named CharStream
Additionally, there are a large number of functions which convert their function input into a CharStream
def funky_the_function(_input):
input = ...
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