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'.
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Publish / Subscribe Paradigm Implementation Problems
Reading the final chapter 6 of the paper "The Many Faces of Publish/Subscribe" I stumbled across:
Decoupling is a desirable property because it enforces scalability at the abstraction level,...
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Where and how to handle user password hashing in Clean Architecture?
I'm currently building a new application and trying to apply some of the principles of Clean Architecture. One of my first roadblocks is implementing my own Identity system (to avoid being tightly ...
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If your company ships multiple products, does it make sense to use a mono repo for your integration tests?
Assumption: Each product codebase is in a separate repo. If the product codebase was a mono repo, it would be a no brainer to just put them together.
Assumption: Integration tests in this context ...
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Cross-aggregate operations, use domain service or domain events?
I'm refactoring a settlements module in a large healthcare application. I'm trying to follow DDD.
Let me give you a short and simplified description of the refactored code:
A patient has an ...
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Design pattern for creating object hidden from client
I am having difficulty understanding which design pattern would be best for the following scenario. An application uses a database. That database can either be the production version (SQL) or a test ...
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Breaking a website into a bunch of micro services
Imagine we have a website happy-cooking-together.com. (I made it up so if becomes available all of a sudden don't take it for real.) It's getting quite a lot traffic and multiple teams are working on ...
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Batch Syncing between two system and one system reverted its state to older DB state. Syncing Problem
We have a system which generates db records and a ever increasing id named archive_id ( bigint in postgres).
sample table: record_table ------ archive_id bigint,info varchar
Another system ...
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Separation of Logic and UI - Does the orchestration belong in the model?
I wrote an app with the MVP Passive View pattern.
My solution has four different projects. A MyApp.Core containing all kind of business logic, a MyApp.Forms containing stuff related to WinForms (UI), ...
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Replace Conditional with Polymorphism in a proper way?
Consider two classes Dog and Cat both conforming to Animal protocol (in terms of Swift programming language. That'd be interface in Java/C#).
We have a screen displaying a mixed list of dogs and ...
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How an async response is usually getting back to the clent in typical reactive highload architecture?
A typical highload reactive architecture is:
(Q means queue)
And usually arrows are from client to DB at such sketches. My question is how the response is going back? The same queues and other stuff?...
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what is the real use of JS/Jquery in Asp.NET MVC application?
I am planning to design a new web application using ASP.NET MVC 5. I used to write a lot of JS/Jquery code on UI when I was a beginner with Web forms applications. After reading/learning a lot of ...
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Microservices communication: Avoiding single point of failure
As far as I know, there are two commonly used patterns when dealing with services communication in a microservices architecture:
Direct-calling other services. For example: Service A handles some ...
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Data Integration Design Using Microsoft SSIS
I am working on a data integration project, where I need to extract data from oracle source and load it to XML file. The requirement is to get the list of customers and foreach customer create an xml ...
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Writing Event Process architecture for multiple event handler interfaces
I am working on Java program which will listen multiple kind of events from multiple sources and store information to multiple sinks.
Each interface will have its own source to listen and own sink ...
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What is the best Architecture / System Design to launch same app in different flavor and a bit different logic?
There is a company let's say "X" which mainly deals in Real Estate / properties and has a website (online portal) to display those properties.
Just like any other big company when they saw a ...
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DTO vs. read model
If I understand the concept of read models correctly, then it's just a simple query to return a use case specific data set.
But a DTO seems to have the same purpose, but in a more complex way (...
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Stop a process for human control if some score is reached (Screening System)
Say I have a blogging system. Users can create posts that will get automatically published unless some score is reached.
So when users save a post, we do some calculations and add up some numbers ...
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DDD Application Service Architecture Question
I often run into this decision making scenario of where to call a Domain (or Application Service) when building my Domain Models. Maybe the confusion is in identifying whether this is a Domain service ...
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Microservice boundaries definition and dependencies handling
I'm reading a lot about microservices but one thing remains a bit unclear to me.
Let's say in my organization, I have 2 abilities:
Extract street names from one or more blocks of text
Given a ...
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Android Clean Architecture - Seperate Usecases, Single Usecase, or not a Usecase at all?
I'm working on refactoring an older project of mine to follow the Clean Architecture paradigm (and loving it so far) and one of my components is causing me a bit of confusion in relation to whether or ...
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Should I Microkernel or Microservice my legacy ERP?
I have been working on an n-tier monolith application for a couple of years, and want to build a plan to transform this big ball of mud to a more maintainable system.
I came across Software ...
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Can CQRS pattern exist without mediator pattern?
Can CQRS pattern exist and/or work without mediator pattern?
I mean there are always commands and these commands have to be dispatched somehow to the handlers that perform some logic on them.
Does ...
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Best practices for database backward compatibility
I am working on an app which has multiple versions deployed in the market. Different versions have modified databases and databases are to be synced between local storage and server storage by signed ...
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What are some approaches used in financial applications to prevent deposit/withdrawal sync problems?
I am currently facing a problem with an application that has deposit/withdraw functionality.
The underlying database (Cassandra) offers no read/write locks.
Now suppose user A has deposited 100$...
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Unit Testing in VIPER Architecture: Possible?
TL;DR There are no methods in VIPER which are returning any value so how to test them?
Reasoning:
In VIPER, each layer is communicating with other layer by holding an abstract reference to it (...
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How to architect a communication of objects between 2 software (B2B, so called, communication)?
There's a 1st software module (s1) that generates data and then there's one or more software modules (s2, s3) that will receive that data (objects), based on pre configured actions that define the ...
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Is "evolutionary software architecture" a contradiction?
In my understanding, evolutionary architecture boils down to making architecture easy to modify. Now architecture is often defined as the things that you should get right early because they will be ...
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Web API : Centralize business transaction logic : Good Idea?
We develop on a ASP.NET Web API where we use the "Unit Of Work / Repository" pattern :
Our Controllers looks like that :
public class MyController : Controller
{
private IUnitOfWork _unitOfWork;
...
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Android - Clean Architecture - best way to structure packages?
Can you all take a look at my package structure to understand how i implemented clean architecture in android:
if we take a look at the clean architecture diagram it looks like frameworks is apart of ...
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What does Robert C. Martin mean by SQL being unnecessary? [closed]
I've been reading/watching a lot of Robert C. Martin content. I've come across him saying SQL is unnecessary because of solid state drives. When I search other sources to back this up I get a bunch of ...
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Ways to share DTO across microservices?
My scenario is as follows.
I am designing a system designed to receive data from various types of sensors, and convert and then persist it to be used by various front-end and analytics services later....
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Web page accessing local system via localhost HTTP API
I have seen this pattern that allows web pages to interact with local system resources through a HTTP interface and I have a couple questions about it:
What is this pattern called?
What ...
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Uncle Bob's clean architecture - Composed entities
I'm building an Android application, and trying to follow the Clean Architecture pattern.
I am a little confused on what my entities should look like regarding some of my use cases.
Example
I have a ...
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How to implement format-complying logging system?
We have a system that generates lots of logs and we have to somehow maintain logging workflow in a project.
The 'strict' (let's assume it's strict) requirement is that there should be a document ...
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Running Multiple distinct Services on a single server process
I am working on a java server, which has a bunch of seemingly distinct "services".
A lot of which are just effectively classes. From a software architecture point of view I wonder what the opinion is ...
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Design Patterns to model complex decision graph
I am currently building a piece of code that creates side-effects based on input parameters.
It has around ten input parameters and about six available side-effects.
Based on the input parameters, the ...
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Retry Architecture
This has been on my mind as I developed several applications with this feature.
Suppose that an application is required to process incoming requests in an asynchronous manner. Take the example of a ...
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Dependencies within the inner hexagon of Ports and Adapters
In this article Mark Seemann explains how Onion/Hexagonal Architecture (or Ports and Adapters) are somewhat similar to a layered architecture when the Dependency Inversion Principle (DIP) is applied. ...
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Disintegrating monolithic application with Micro services vs ESB approach?
I have only theoretical knowledge about ESB.
Use case:-
I have ecommerce like application where I can receive orders from multiple sources in different formats .
Once application is submitted I ...
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How big or small should a Use Case Interactor be in Clean Architecture?
I’m trying to figure how best to define a Use Case using Clean Architecture and DDD. Let’s say I have an application that handles the pick, pack and shipping of a delivery. Here is the flow:
User ...
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Microservices Autonomy
I'm currently looking at microservice architecture example and am struggling to make my services truly autonomous.
I have the following services...
CustomerAPI
CustomerService
OrderAPI
OrderService
...
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How should I structure my Observables on a Nodejs application with RxJS
So I am learning reactive programming, and I am building an app for fun that listens on various stock information tickers, and calculates specific things to show in charts etc.
So right now I have ...
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In MVP, should the View have access to Domain objects?
Let's say I have a form for representing a user.
When pressing the "Save" button, should a User object be:
constructed by the View based on the input, then passed to the Model via the Presenter and ...
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Architecture for a Customer/Project/Quote/Order system
I am working on figuring out the architecture for putting together a complex modular system that has Orders, Customers, Projects and Quotes.
The customer can have multiple projects. For each project ...
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How to model infinite non-linear combination? [closed]
Let L be an ordered set of positive integers (for example, the set of all primes).
Here, #L = infinity, and N is a positive number serving as an upper limit. Goal is to list the following set M:
M =...
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Responsibility for adding and ordering menu items in a modular application
Following Ordering menu items fed from multiple modules the question was raised to me, who is responsible for ordering and alignment of menu items in a modular application.
The previous link suggests ...
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Engineering approach for Metadata Driven Architecture
Recently came across MDDA, I think the term was first coined by Salesforce (pg3) and others have followed it like Metadata Driven Architecture
at benefitfocus.com (less dense and well written).
The ...
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Clean Architecture: Use case containing the presenter or returning data?
The Clean Architecture suggests to let a use case interactor call the actual implementation of the presenter (which is injected, following the DIP) to handle the response/display. However, I see ...
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Understanding the data flow in Spring REST layered architecture
I am new to Spring as well as layered architecture. So am a bit confused as how data flows among the different layers.
What so far I have understood is:
Layers:
Controller (which accepts requests)
...
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Is the code permanance spectrum real?
I read in a data science book that there is the concept of a code permanence spectrum. If your code is low on the permanence spectrum the code is ad-hoc/throw away work. I work mostly as a scientist ...
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