Questions about problem solving and planning for a solution through software design.

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2
votes
1answer
61 views

timed events to modulation of real-time audio

I am new very to audio programming and am having trouble figuring out the right kind of algorithm for converting control events (e.g. like MIDI) to real-time sound genesis with a buffer. At the ...
1
vote
3answers
74 views

Performing data operations that involve separate applications and data sources

I'm designing an enterprise application that produces output based on some input data from another application. In this case, I happen to have also built and thus do control the source application ...
4
votes
1answer
201 views

Should I avoid data duplication?

I'm trying to design a relatively simple ERP system. However, there are some requirements that complicate things a little bit: It must be possible to add all sorts of contacts to the people table, ...
2
votes
2answers
99 views

Typedefs to convey relations between classes

I'm wondering if the following use of typedefs is any good practice, or if there are any downsides to it. Basically I have alot of "data"-structs, which are intended to be used in (globally unique) ...
0
votes
1answer
161 views

Would adding more digits be a way to scale a order generation service? [closed]

I am working on interview questions from Amazon.com Software Development Engineer Intern Interview Questions. One of the interviewees was asked "give a scalable system design of Amazon.com's order ...
0
votes
1answer
138 views

Get inspired by real world objects and their interactions [closed]

Based on this question I think while the aim of OOP is not necessarily to copy real world objects, they could be source of inspiration to design a software or solve a problem or even learn the OOP ...
1
vote
4answers
160 views

Making an automotive system more 'modular' in terms of software?

I am working on an automotive project that we are supposed to make more modular. I am a software guy and I have very little knowledge of automotive hardware.I dont have any requirements or details ...
1
vote
0answers
42 views

what is the best method to return db query and additional information from other methods

I am new to MVC and trying to continue to learn base on best practices. I am trying to return data from multiple sources -- one source being a mysql db query and another source from another method ...
4
votes
1answer
176 views

Event sourcing and REST

I came across Event Sourcing design and I would like to use in an application where a REST client is needed (RESTful to be precise). However I fail to connect these together as REST is quite CRUD-like ...
1
vote
2answers
178 views

Is it possible to avoid SQL injection by not using a Query Language for most tasks? [duplicate]

I'm coming at this from a somewhat beginners viewpoint so if this is an obvious question it's because I didn't know the right terms to search for. Are there DBMS's that provide an alternative ...
2
votes
4answers
294 views

How To Avoid Dependencies between Modules

We have two modules, lets call them U and F. Module U has entities like that: class Upload { Long id; User uploadedBy; Date uploadedAt; } Module F has entities like that: class Field ...
3
votes
1answer
266 views

How would one go about creating a “Licence Key” for a distributable source-available Software project?

This is something I have wondered, it has been a while since I have seen anything you can download which has to connect to license server in order to monetize a piece of software (and the last time I ...
1
vote
2answers
179 views

Which design (pattern) would be suitable to abstract logging platforms?

I need to create a simple system to abstract logging platforms. The idea is that I'd like to be able to exchange or activate a logging platform (nlog, log4net, enterprise library) via some ...
1
vote
0answers
52 views

Help design this data import program

I want to import some data from various locations and pump it into MongoDb and some cloud services. The data starts off as JSON, I read that JSON, create some objects in mongo, go to the next level ...
0
votes
1answer
66 views

Design caching system

I am thinking about making my own caching system, mainly for C#, but this is more a design question, so the language doesn't really matter. Let me start at the beginning, I have a basic web api, ...
0
votes
2answers
31 views

Making sure loaden (non default) config is valid

I'm writing a device Software in which the device must handle much data. Therefore it has a database, either on NV-Ram (Non-volatile memory) or a SD-Card. Due there's a DB which I can use, I also use ...
0
votes
2answers
109 views

Organizing C++ Components [closed]

In my current company we've brought the discussion about how to organize most of our different C++ components considering the following requirements: There might be interdependencies between ...
1
vote
2answers
716 views

REST API - Should API Return Nested JSON Objects?

When it comes to JSON APIs is it good practice to flatten out responses and avoid nested JSON objects? As an example lets say we have an API similar to IMDb but for video games. There are a couple ...
0
votes
1answer
89 views

Should I prefer classes or singletons in JavaScript/Node?

This question applies especially to Node.js, but also to JavaScript in general. I started working on a simple web app in Node.js. I'm relatively new to Node and JavaScript, and come mainly from C# ...
15
votes
3answers
1k views

How much detail to put into first iteration of project?

I have just started a new personal project (Python), and am writing what amounts to a "rough draft" of the program, the minimum required to do what I want to do. I am not yet putting in extensive ...
1
vote
0answers
45 views

Designing an Action abstract class with GUI

I have an Action class, where an Action can do a range of things, including: Performing a sequential list of other actions Performing an action if a condition is true Allowing the user to pick ...
3
votes
2answers
159 views

IoC invalidation

I have a bunch of services that get registered as singletons by my IoC container on startup, all of these services have a constructor which takes in a connection string which is used by the underlying ...
1
vote
2answers
119 views

Use Case Diagram. Can a system be its own actor?

Hello I got the definition below for an actor. That means the system cannot be an actor to itself. I was wondering what if the system is supposed to display certain elements on a screeen. In that case ...
12
votes
4answers
840 views

“Use map instead of class to represent data” -Rich Hickey

In this video by Rich Hickey, the Clojure creator, he advises to use map to represent data instead of using a class to represent it, as done in Java. I don't understand how it can be better, since how ...
0
votes
2answers
167 views

In what case a use case should be written

I am trying to figure out some questions to help me decide whether a use case should be written for that requirement or not. Is it neccesesary to have a use case for each requirement? E.g I have ...
22
votes
3answers
1k views

Caching at business layer vs Caching at Data Layer

I have always worked on projects where caching was done on DAL, basically just when you are about to make the call to database, it checks if data is already there in the cache and if it is, it just ...
0
votes
1answer
63 views

Beginner's UnitTests for MVP Presenter class

In my application, I have a user settings form with roughly 20 checkboxes and a few other controls. The checked state, enabled state and texts of these controls are bound to about 60 properties of the ...
1
vote
3answers
164 views

Is self referencing tables a good idea for geographical data?

I am creating a design for different Geographical types where each type is just a little "place holder" in over all heirarchy. One example is Zip code Belongs to Territory Belongs to District ...
4
votes
1answer
225 views

Should I be using separate 'domain' layer?

I have been reading a lot about domain layer and DDD. However I am still confused about it. To me they seem to be a fancy name for business classes however more modelled towards your application ...
1
vote
1answer
46 views

Are Serverlet Containers' Characteristics Against Scalability and Fault-Tolerance of a Web Application?

We most likely deploy a JVM-based Web application (e.g., Scala) on a container (e.g., TOMCAT, Jetty, etc.). Does the following points about a serverlet container goes against us to create a scalable ...
3
votes
4answers
356 views

YAGNI principle put to practice

I recently came across to this principle and so far it is clear the fact that doing things that you don't need at the moment is not feasible as they might not be used or might be changed. That being ...
1
vote
6answers
228 views

What is a better design a light weight user or a heavy weight heavy user model?

This is a design question and I am confused about how to design my user object. As in most systems, user is the central part of my application and a lot of information scattered around my database ...
1
vote
2answers
71 views

Define Interface Simplicity vs Implementation Simplicity

In Richard Gabriel's The Rise of "Worse is Better", he talks about the simplicity of interface vs the simplicity of implementation in a design. I've never been able to quite grasp what he means and ...
2
votes
3answers
298 views

How to implement the repository pattern for an app that will change its database from sql to nosql on in couple of years?

I have been reading a lot about repository implementation. I am confused about which way to implement it for a project I am sure would change its data layer methods because of db migration from MS Sql ...
14
votes
4answers
1k views

How does one keep argument counts low and still keep third party dependencies separate?

I use a third party library. They pass me a POJO that, for our intents and purposes, is probably implemented like this: public class OurData { private String foo; private String bar; private ...
4
votes
1answer
232 views

Derive from a base class but not include a condition in the base class's method

The current code looks like this: public class Details { Public void Populate() { WriteChapterDetails(); } public void WriteChapterDetails() { if ( ...
0
votes
2answers
89 views

How to store users' info in network app?

I'm currently working on a school project that aims at creating a P2P chat client for users on the same network. For now, it will only be used by users on the same LAN network. But hopefully,I will to ...
0
votes
1answer
100 views

Abstracted better? Data driven string creation

I am trying to post this question neutral of programming language so it helps the widest audience. But for those who must know, I am using Objective-C and iOS frameworks. The background: I have a ...
0
votes
1answer
35 views

Merging user activities into one stream with a common representation

My social network website currently has forum threads and posts gallery pictures albums on the users' profiles group discussions classifieds I would like to create one "stream" of activity. It ...
0
votes
1answer
68 views

Application with really dynamic data structure [closed]

Well, I'm on the verge of this project that really puzzled me. The situation is, in our office, we have a department that collect data about the corporate performance indicators from all across the ...
5
votes
3answers
417 views

Why do python generators and functions share the “def” keyword?

Consider the following: def some_function(): return 1 def some_generator(): yield 1 In the code above, some_function is a function, while some_generator is a generator. They look quite ...
1
vote
2answers
153 views

Software release question: do you refactor pre or post-release?

I work in finance and we have some calculators that I support. I can come up with programming solutions, but I don't have a lot of software design or release management experience. I was recently ...
2
votes
1answer
102 views

How to design database tables for a Factory class?

How can I design database table structure for a class that varies in its core parameters, when it is created by a factory method? I have a Factory like this: class ProductFactory { public ...
4
votes
3answers
122 views

Pattern for checking online service availability

I'm not sure that this is entirely on-topic, but I'll try to make it so. I have an online service (API) and an Android application that uses it for all actions in the app. At the current moment, ...
1
vote
2answers
38 views

Using many Resource URI to create a Record and handling failure

Hi Guys, I have a decision to make to solve a problem, I’m describing the problem below. Application Overview I have an ASP.NET MVC 4 webApp which uses Rest Api for almost all the tasks, from Login ...
10
votes
1answer
443 views

How to avoid chatty interfaces

Background: I am designing a server application and creating separate dll's for different subsystems. To simplify things, let's say I have two subsystems: 1) Users 2) Projects Users's public ...
-2
votes
1answer
73 views

How do we design a good website, not graphical? [closed]

I always created an application without proper design before creating it and having a very hard to manage code which I don't want to touch it again. I understand to create a system we have these ...
3
votes
2answers
108 views

Strategies for parameter wrapping

Methods with many parameters are often sometimes unavoidable. In my own experience I often find this is the case for program entry points and complex mathematical procedures - where refactoring is ...
6
votes
3answers
1k views

Designing a REST api by URI vs query string

Let's say I have three resources that are related like so: Grandparent (collection) -> Parent (collection) -> and Child (collection) The above depicts the relationship among these resources ...
0
votes
3answers
82 views

Heuristics on when should one subclass and when not [closed]

Are there any good tips, when one should subclass and when should not? It's clear that we should not subclass when we want to reuse a single method of some class we override all methods, changing ...