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

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0answers
22 views

How to quantify the performance and feature requirements of a system I want to make, when I do not know a lot about the domain?

For more clarity on what I am asking, let's take an example: If I am to design a system that uses a database, and I have quite low knowledge of databases in general (I understand relational databases,...
0
votes
1answer
39 views

Use redundant data in database design when have multiple relation

In my web application users can submit their advertises and buy package for advertise (packages are used for priority of showing advertises) Database schema is like this: **Package: id, title, ...
-1
votes
1answer
94 views

How to design property files

I always wonder what is the best way to design your property files. I have few questions that I didn't find an answer to them Do we place all our labels / error messages in one file? Do we split the ...
2
votes
6answers
274 views

Should I be doing checks on data that I'm supposed to be able to trust?

I am working on the frontend of a product, and it is now broken due to bad data from the backend. This can be caught internally before it gets anywhere close to production, but we end up fiddling ...
0
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0answers
20 views

What layer should contain interactions with external or remote resources which are not strictly data operations?

Assume an application with a layered architecture, i.e. presentation, business/domain/logic, data access: it makes sense to plug access to external APIs in at the data layer if what they do resembles ...
3
votes
4answers
214 views

Would implementing a “Throwable Event System” be abusive?

I have been thinking for a couple years now about using Throwable events and implementing a sort of event system that uses throw to dispatch an event, or let a different method handle it with throws. ...
32
votes
9answers
5k views

How to cope with different development styles (top-down vs. bottom-up) in a team?

Say you've just started working in a very small team on a {currently relatively small, though hopefully bigger later} project. Note that this is an actual project intended to be used by other ...
2
votes
0answers
59 views

How to keep IDs in sync when using Factory?

abstract class Product { public abstract Product createProduct(); ... } class OneProduct extends Product { ... static { ProductFactory.instance().registerProduct("ID1", new OneProduct(...
1
vote
1answer
40 views

Specialized API endpoints or multiple calls to generic resources?

This problem came up while designing the API for a SPA web application, which communicates with the server via AJAX. On one page the user, who is creating a list of people to invite to an event, has ...
4
votes
1answer
272 views

Reuse already fetched data for request

I have action that fetches user model from db to check access. Then I have method that in some cases requires same model. function checkAccess(req, res, next) { var data = Data.fetch(req.params....
2
votes
2answers
60 views

How to create an efficient implementation of a dictionary of synonyms?

How do I create a dictionary of synonyms that is efficient in terms of retrieving synonyms of a word? Basically, I want to use some sorts of data storage to store groups of words, and enable an end-...
10
votes
5answers
11k views

How to make creating viewmodels at runtime less painful

I apologize for the long question, it reads a bit as a rant, but I promise it's not! I've summarized my question(s) below In the MVC world, things are straightforward. The Model has state, the View ...
1
vote
2answers
53 views

Separating save logic from WinForm to make it reusable

I have a Windows Form for creating configs. It has around 50 fields of data, which represent a group of entities, that I need to capture when the user presses the save button. Currently, on the press ...
0
votes
0answers
27 views

Design from API documentation to code

I have a full API documentation made of uris, request and response bodies ready to use. Uris are all externals, and I have to first visit an entry point that'll give me a token, and then use that ...
0
votes
2answers
111 views

Where/how to store program data?

This may be more of a software design question - but I've been working on my first "real, non-academic" Java project and have recently learned about good code practices (such as breaking down methods ...
2
votes
2answers
92 views

Idempotency and concurrency in a REST web service

Is concurrency and idempotency mutually exclusive for a REST web service or can it be done so a service can be both concurrent and idempotent? Using a optimistic lock methodology like using Version ...
0
votes
1answer
128 views

What kind of data structure should be used to store components in an electrical schematic program?

Is there a specific data structure, object oriented programming methodology, and/or approach for achieving what programs like LT Spice, Altium Designer, and Cadence Virtuoso use to manage components/...
2
votes
4answers
291 views

Are static global variables as bad as global variables? How to avoid using them?

In general, I know that global variables are bad and should be avoided. Are static global variables equally bad? In all my projects, I have heavily relied on static global variables. From design ...
0
votes
2answers
65 views

How to calculate new property for old records efficiently?

Let's say we have classes something like this: public class Item1{ public Guid Id {get; set;} public string Name {get; set;} public decimal Price {get; set;} public int Quantity {get; ...
4
votes
2answers
167 views

Distinguish different type of Comments

I would like to provide design decisions in the comments as well. I want design decision comments to be distinguishable from function contract comments, on cursory examination of source code. How to ...
7
votes
6answers
5k views

Understanding “programming to an interface”

I have come across the term "programming to an interface instead of an implementation" a lot, and I think I kind of understand what it means. But I want to make sure I understand it's benefits and it'...
16
votes
6answers
4k views

A language based on limiting amount of arguments passed to functions

The idea is inspired by the fact operators such as +, -,%, etc. can be seen as functions with either one or two arguments passed, and no side-effects. Assuming I, or someone else, writes a language ...
1
vote
1answer
76 views

Inner and outer class relationship: should outer class be friend of inner's?

Is this design bad? Does it break encapsulation? The structure class B is a component of class A. Therefore, class A needs access to class B's members. Let a house be class A. Let a housekeeper be a ...
14
votes
9answers
12k views

Use constructor or setter method?

I am working on a UI code where I have an Action class, something like this - public class MyAction extends Action { public MyAction() { setText("My Action Text"); setToolTip("My ...
2
votes
2answers
59 views

AMQP broker and happen-before guarantees

I am trying to figure out how an AMQP broker, such as RabbitMQ, can be integrated in our architecture. This should allow to easily scale horizontally in the future. For the sake of simplicity, let me ...
1
vote
1answer
68 views

Should written use cases be consistent with use case diagram?

I'm developing a video web system like YouTube where users can upload, view, update and delete their own videos (CRUD operation). Original I drawn the use case diagram like this: But I learned ...
0
votes
1answer
27 views

Design question to best option for storing data in file or DB

I am working on a feature where I need to store some data and I am not sure what should be my best option to store this data. I am sending data to some third party and want to show some part of that ...
10
votes
4answers
505 views

Is it bad practice to reuse method parameters?

There are times when I will need to modify a value passed into a method from within the method itself. An example would be sanitizing a string such as this method here: void SanitizeName(string Name)...
1
vote
2answers
142 views

Designing validation classes

This is a follow-up of this question. I decided to implement what the accepted answer suggests, however, I realized I also needed individual public methods for each member the entity to be validated ...
1
vote
1answer
49 views

Decoupling the loading of data, sorting and usage

I have the following requirements: Load data from a variety of sources and fill a list with it Use a batch of data to perform some computation Some additional information: The algorithm for ...
0
votes
2answers
132 views

Is an empty class in some cases correct

I know it's generally a design flaw to have an empty class, yet I'm wondering whether there are some cases where it isn't to have an empty (abstract) class to group objects. Especially when ...
2
votes
4answers
178 views

Are factories that only return one type of object bad?

Someone in a Stackoverflow post (I didn't bookmark the question unfortunately) commented, that Factories that only return one type of object are a code smell. I find myself writing these kinds of ...
1
vote
2answers
77 views

How do you represent an object when you need to know which subtype you're working with?

I have some data that I need to represent in a form. As an example, it might look like this (in psuedo-json): [ { "value1" : "int" "value2" : "{1, 2, 3, 4, 5}" "value3" : "...
2
votes
0answers
169 views

Symfony2 - Best aproach for a plugin system

Symfony2 is handling all its things in bundles in /app or in /vendor. This is fine, if you are handling and managing all by yourself or Ops that handle all needed things. But I haven't found a good ...
-1
votes
1answer
78 views

Controllers and Separation of Concerns: discussing possible strategies

I've been working on a project based off of this tutorial. Unfortunately, the controller classes in this are quite dense and have terrible separation of concerns. I should have realized this ...
0
votes
1answer
66 views

GitFlow, should my release branch include minor version number?

I've found it difficult to find a definitive answer to this question. Using Semantic Versioning and GitFlow should my release branch include the minor version number? I'm not referring to tags. My ...
0
votes
3answers
285 views

Simple React application design

I have a very simple app that lets you log in and then displays a dashboard. The design process with React and Redux is very simple : I have two React components : Login and Dashboard I store a ...
7
votes
3answers
301 views

Is mutually referencing classes a consequence of bad design? [closed]

I am currently working on a small game I did in about ten days. Since I am programming for myself, I am being lazy and going to the easiest solution with (too) little concern about bad code quality. ...
5
votes
1answer
308 views

Need to re-build an application - how?

For our main system, we have a small monitor application that sits outside our network and periodically tries to log in to verify the system still works. We have a problem with the monitor though in ...
3
votes
6answers
324 views

Mutability and getters

In the example below, I have a Person class and class B that holds a reference to a Person. Person has a public foo1 method that can alter its state (it's a mutable object). Suppose clients of class ...
1
vote
3answers
95 views

Implementing an event scheduler for animations

The basic idea is to have some animated widgets that sit in a container, quite similar to Qt (the only actual difference is that my widgets are animated). The animation is in some cases dependent on ...
55
votes
8answers
6k views

Should a developer do UI mockups if there are no designers in the project?

I'm working with a small team that creates a proprietary web application and UX isn't much of a priority since our own people will be the ones operating it, but we do try to make their jobs easier. ...
1
vote
4answers
52 views

Handling missing values in response

Suppose a web application relies heavily on the third party APIs and I am expecting a response from it but somehow I don't get any, maybe because of the API exception or missing value on the API side ...
0
votes
3answers
110 views

Cyclic dependency in this project design

I have 2 modules (containing multiple classes). Let's call them Module A and Module B. Module B has a dependency on Module A: Module B -> Module A. Now, I have created an utility class C, which A ...
0
votes
0answers
49 views

Making DAO's independent on each other

I have these two classes (Getter/Setter/Constructor omitted): public class Company { private String name; private String adress; private List<Employee> employees; private Uuid ...
4
votes
4answers
349 views

Are there any alternatives to dependency injection for stateless classes?

I am working on an application whereby I have designed classes to fit into several groups: Immutable: initialised through constructors, uses copy-and-swap idiom (inc. move), can deep copy (i.e. ...
1
vote
1answer
52 views

When to have a generic method for multiple tasks when some differ?

I process a lot of tweets in real time using python and for each tweet I need to assign it in to a specific bucket. I have about 50 buckets, each with their own rules. The majority of them are simple ...
0
votes
0answers
50 views

How does maven internally manages package dependency?

Can some let me know how does maven internally manages package dependency? Is there any architecture diagram available on the net for the same? I also asked this in Quora and maven user mailing list ...
1
vote
1answer
159 views

is this a good design

For example, I have a clan and a character. There's a character that is the leader. To give the clan a specific feature, some money from the character is required. I don't want to have too much tight ...
0
votes
3answers
228 views

DDD Request Validation Handling

I stuck somewhere that I can't find a solution! There are plenty of validation questions here, but as far as I see, most of them were asking about entity validation. But what about request validation? ...