Object-oriented design is the process of planning a system of interacting objects for the purpose of solving a software problem.

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Is DDD not appropriate for my website or should I introduce a Query Layer?

I have inherited an ASP.NET website application and the previous developer has used what I believe are some DDD concepts. I am new to DDD and I have to admit I am struggling with the practical side of ...
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3answers
133 views

How do I recreate this Access Control/Group/ whatever methodology in OO/MVC

I am looking at trying to rewrite an application that is mostly procedural to an MVC/OO approach in order to teach myself a deeper understanding of both. BUT, I am having some conceptual issues with ...
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2answers
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Object creation: when should I expose a factory vs wrapping class?

I am having some problems trying to figure out when to use a factory or to wrapper class. This question is slightly geared towards C# I guess, so I'm not sure if this is the correct place to ask. Say ...
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2answers
253 views

Updating an Entity through a Service

I'm separating my software into three main layers (maybe tiers would be a better term): Presentation ('Views') Business logic ('Services' and 'Repositories') Data access ('Entities' (e.g. ...
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2answers
125 views

Design suggestion required to create an Export plugin

I am trying to create Export Module for our application, this seems to me a bit complex so I am posting it here to get some guide lines. In our database we have a list of Products, which can be ...
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1answer
136 views

Program Architecture: How to manage objects that are interdependent

Consider the following case, image I making a simple chat program; I want it to be extensible such that it would be fair easy to add add different scripting and user interfaces. I want the core ...
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1answer
431 views

Interface questions for using Command Pattern and Dependency Injection together

I have many projects that have essentially the same high level requirement: test all hardware on a device. Each device can have a different communication protocol, requires different test equipment to ...
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1answer
146 views

Creating Set Subclasses or Allowing Outside Configuration

I have a TriggerCaller and a TriggerAction class. The Caller "calls" the do() method on the action, which is set with the TriggerCallers setAction() method. The rest of the program should deal with ...
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1answer
212 views

Base Class, with method that returns Derived Class. design flaw?

I'm writing a Math equation solver in python (for fun). The first design that came to my mind: Expression: base class for every item in an equation (maybe bad name). BinaryExpression extends ...
3
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0answers
232 views

Why should ViewModel route actions to Controller when using the MVCVM pattern?

When reading examples across the Internet (including the MSDN reference) I have found that code examples are all doing the following type of thing: public class FooViewModel : BaseViewModel { ...
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0answers
108 views

Too many parameters to data processing class constructor

I have a conceptually simple application: data comes in as small encrypted packets, they decrypted and validated, some are stored in the database, some rules are applied, and a reply might be ...
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0answers
1k views

How should I structure modules in an Angular.js application?

I am fairly new to Angular.js, and one that confuses me is how to best use modules in an application. It seems to me that modules can contain any of the other common constructs in AngularJS ...
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0answers
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General design choices. How do you decide?

I have a project in C that I'm looking to convert to C++. The project does white box hardware testing of a device (actually many similar devices). In this case the device has two processors. Each ...
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0answers
58 views

OO Design Question - Library/Objects for API which includes id references

Public api: getClients / getClientById - returns a json object like: { clientid: 1, name: "Client1" } getProjects / getProjectById - returns a json object like { projectid: 5, name: ...
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0answers
114 views

What is a good way to structure my UI classes?

So, I have a program which has a swing GUI. (Java - duh!) I really, really don't think the way I'm structuring my classes now is good, so I am reorganizing from the ground up to follow best practices. ...
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0answers
31 views

Proper program design for submitting a form

I have been stuck wondering what the best solution to the problem below: I am developing a form like GUI with quite a few places for input. Currently, I am storing each UI element in an ArrayList ...
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0answers
62 views

Reporting Logic vs Domain Logic

Should the reporting logic to extract domain data in a certain format reside in domain objects or separate reporting objects? The reporting logic needs to: select entities/data which match selection ...
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0answers
204 views

API Client Design

I'm designing a client to the Tomtom WEBFLEET.connect API in PHP. (You can read more about the API through the full documentation here: ...
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0answers
57 views

delegate classes for UI events

When designing a delegate to represent the state of a UI (java swing) what is cleaner: to manipulate the delegate directly from the custom event handlers defined in the UI code, or to register the ...
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0answers
158 views

OO design for client-server/RPC/n-tier data transfer (specifically SignalR)

I'm using SignalR to implement a client/server system, but I guess this question could apply to other tiered/client-server/RPC systems. If you aren't familiar with SignalR, you basically create a ...
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0answers
233 views

How should Object Model wrapper classes behave when underlying objects are deleted?

I'm currently building an object model library for use in a project. It wraps our internal concepts - Servers, Folders, Items - in an object hierarchy (IFolder, IItem, etc), and we have several ...
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0answers
99 views

DAO Design with Child Objects

If I have objects that represent a hierarchy of relationships. For example: Person   Spouse     Spouse Contact     Spouse Address ...