The high-level design and description of a software system. Architectural design distills away details of implementations, algorithms, and data representation to concentrate on the interaction of "black box" components.

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Report generator windows service polling database for work

I'm building a new report generator for our in-house survey system. (No I can not use any off-the-shelf software. These are highly customized reports.) I want to use Topshelf to host the generator as ...
2
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2answers
188 views

Distribution of Event Listeners in a Distributed Service Oriented Architecture

I have a service architecture composed of services that service common areas of the application. Examples of services would be: AccountService (manages client accounts in the system) BillingService (...
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1answer
395 views

Recommended architecture for an interactive table widget with multiple behaviors in Javascript / jQuery

Use case: For an administration UI, I want an interactive table widget with a number of behaviors: Collapse / expand (yes, this means the rows are a hierarchy) Update of data in a child cell based ...
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2answers
715 views

Game server code design

I'm designing a multiplayer game server where the players are in rooms. Right now I have classes to take care of the client, networking, etc. I'm struggling however to find a design for this Room ...
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1answer
309 views

When to use non-embedded databases over embedded databases [closed]

We are trying to start a web base project that need to develop based on MS technologies such as C#,.net, IIS etc. This is a web application suppose to sell as a product with a single installer. Now ...
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1answer
3k views

Mobile development project architecture model/pattern

I would like to hear some improvement suggestions for mobile development (Android/iOS) project architectures. I would like to go for a "safe" design, modular and that can be easily maintained in time. ...
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1answer
115 views

Do we have any special design considerations for maintaining anonymity in an application?

This is an open-ended question which I am analysing while doing some fun projects in leisure. Websites like Google, Facebook do store user activities and perhaps sell them or use them for ...
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2answers
233 views

Should db be mapped directly to the UI or should there be multiple layers of enties/models with mappings to/from each?

I would like to know arguments for/against this concept. Technologies in use from the bottom up: MSSQL 2012 DB (exclusively accessed via sprocs) Entity Framework WCF Web Service ASP.NET Webforms ...
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1answer
1k views

OOCSS / BEM / SMACSS architecture

I've been working through this article to organize my front-end code. It references articles on BEM / SMACSS, which in turn reference other articles. I'm really trying to understand what the best ...
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1answer
329 views

Where do service implementations fit into the Microsoft Application Architecture guidelines?

The guidelines discuss the service layer with its service interfaces and data/message/fault contracts. They also discuss the business layer with its logic/workflow components and entities as well as ...
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2answers
3k views

Model-View-Controller — Where does a factory class go?

I'm working (slowly) on a small Flask project. One of my models is a class called Post, which is a lightweight namedtuple. Post objects are created by a PostFactory, because creating a Post involves ...
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3answers
2k views

Building a distributed system on Amazon Web Services

Would simply using AWS to build an application make this application a distributed system? For example if someone uses RDS for the database server, EC2 for the application itself and S3 for hosting ...
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6answers
3k views

Why did the team at LMAX use Java and design the architecture to avoid GC at all cost?

Why did the team at LMAX design the LMAX Disruptor in Java but all their design points to minimizing GC use? If one does not want to have GC run then why use a garbage collected language? Their ...
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1answer
357 views

Why aren't Entities allowed to reference other entities inside an aggregate except the root?

I have read in several places this following rule concerning Aggregates: Entities in one aggregate can hold references to any other Aggregate Root, but never to an Entity or Value Object inside ...
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1answer
181 views

Several interdependent models, each with several data sources — how to avoid hell and nightmare

I'm currently working on a project that requires a complicated model structure and I'm struggling with picking the right architecture. First of all, there are several interdependent models. Change in ...
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1answer
292 views

What is the best implementation strategy for this html + javascript widget?

The Problem I came up with this select-box variant in answer to a question on UX.SE: http://ux.stackexchange.com/a/48951/16187 However, working out how to implement it has been driving me mad ever ...
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3answers
290 views

Ways of developing for small system. What is expedient?

I'm developing a small system for internal automation. I use asp.net webforms and faced with a choice: develop a system architecture in an object-oriented style (development becomes more difficult ...
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1answer
152 views

Need Advice About A Specialized eCommerce System [closed]

I'm doing requirements/systems analysis on a particular project and could use some advice. PROBLEM: The project is for an organization that has a number of suppliers, with each supplier having up to ...
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1answer
907 views

How can we calculate Big-O complexity in Functional & Reactive Programming

I started learning functional programming, I am trying to compare between different algorithms that are written in an imperative, functional , parallel programming and using Collections and Lambda ...
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1answer
187 views

Comparison between ATAM method and analysis tools provided by ADLs

This is one of my assignment for this semester. And just to be clear, this question is not about the answer to my assignment as I have already finished it, it is more about the sanity of the question ...
4
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1answer
304 views

Game development design patterns and architectures? [closed]

Some friends and me wish to develop a 2D game just for the experience of learning this paradigm. We are all software engineers with experience in business apps, but we are unsure if the typical design ...
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1answer
2k views

Should we always write Defensive null check in code? [duplicate]

Are there any scenarios where we should not write defensive checks for null? Should we write defensive code or check for NULL every time we have passed a parameter or received a value back from a ...
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2answers
89 views

We have a custom program that generates all the stored procs and classes for the Data Tier. Where will I put the generated classes?

This is more of an architectural question regarding MVC and Data Access: We have a custom program that generates all the stored procs and classes for the Data Tier from the MS SQL database. It's ...
2
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1answer
417 views

What architecture to use for AJAX calls?

I am working on a website with PHP as backend. There are things from the front-end which I'd like to accomplish using AJAX calls. Which of these methods should I use to design them and why? Call to ...
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2answers
2k views

What's the difference between robustness and fault-tolerance?

Systems / programs / distributed algorithms / ... are often described with the predicate robust or fault-tolerant. What is the difference? Details: When I google for +robust +"fault-tolerant", I ...
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1answer
1k views

Thoughts on refactoring a generic DAO

I have designed a generic DAO in Java and am having confusion about whether to refactor it to different design or not. PS Don't say to use already existing 3rd person framework. I know there are some ...
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1answer
860 views

Is it an implementation of a stateful mechanism for Rest API authentication?

In many articles about Rest API's best practices, it is recommended to not depend upon sessions on server side since it leads to a stateful mechanism. I currently use Play 2.2 framework, with a ...
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1answer
170 views

Further decoupling using static libraries

I've been thinking for a while about reasons that prevent a lot of programmers — myself first of all — from writing clean, modular and expressive code while developing, for example, CocoaTouch apps. ...
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2answers
1k views

Shoud I directly return a string message or rather a i18n key when dealing with JSON api?

Suppose a rest api returning this json: { "status" : "fail", "data" : { "title" : "A title is required" } } Since the client application would always adapt the error message, would it be ...
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1answer
2k views

What to consider when designing a web application that will be deployed under a load balancer?

I am currently maintaining a Java web application that is initially designed to work only as a single instance (not in a cluster/farm). Now, the client is planning to upgrade their infrastructure and ...
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1answer
410 views

Designing the bridge between REST layer to service layer

I am working on a project and would like to expose some REST services. The technologies used are RestEasy, EJB and JPA/Hibernate. I have structured my app so that there is a clear delimitation between ...
5
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1answer
889 views

How do I bootstrap a P2P service so that users can locate each other?

My P2P app needs to locate peers, but I don't want to hard-code a DNS address... One example I've seen is bootstrapping via IRC, but I'd like to do this over HTTP/s if possible. What are my options ...
4
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1answer
210 views

OOP, domain models, and the user

When developing domain models, I can see two major ways of thinking about the user: The first one assumes that a program is a kind of "simulation" of what happens in the real world, and the user is ...
100
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9answers
16k views

Is there any “real” reason multiple inheritance is hated?

I've always liked the idea of having multiple inheritance supported in a language. Most often though it's intentionally forgone, and the supposed "replacement" is interfaces. Interfaces simply do ...
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2answers
126 views

Should package structure closely resemble class hierarchy?

Pretty simple question. Should package structure closely resemble class hierarchy? If so, how closely? Why or why not? For instance, let's say you've got class A and class B, plus class AFactory ...
3
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1answer
667 views

How do I cleanly design a central render/animation loop?

I'm learning some graphics programming, and am in the midst of my first such project of any substance. But, I am really struggling at the moment with how to architect it cleanly. Let me explain. To ...
0
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1answer
358 views

Get entities ids from two similar collections using one method

I've got two lists: List<Integer, ZooEntity> zoos; List<Integer, List<ZooEntity>> groupOfZoos; These operations will return collections of values: Collection<ZooEntity> cz =...
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2answers
234 views

What parts of functionality should be refactored into a directive?

I am creating an application from legacy code using AngularJS. I wonder what parts of my code should be moved into a directive. For example, iI had thought of moving a table which is used multiple ...
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0answers
350 views

Entity framework separating entities for product and customer specific implementation

I am designing an application with intention into making it a product line. I would like to extend the functionality across all layers and first struggle is with domain models. For example, core ...
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2answers
1k views

Can Dependency Injection used as an alternative to Reflection for creating instances

There is a piece of .net C# code which use Reflection to create an instance using Activator.CreateInstance(). This is an old piece of code and runs on the top of Enterprise Library. Is it a better ...
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1answer
4k views

Making Class Diagram for MVC Pattern Project

I have a question about making a class diagram for an MVC based college senior project. If we have 2 actors of users in my system, lets say Undergrad and Graduate students are the children of ...
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3answers
2k views

MVC is a GUI Architecture or a Architecture to GUI and Domain?

Fowler refers to the MVC, as a GUI architecture: There have been many different ways to organize the code for a rich client system. Here I discuss a selection of those that I feel have been the ...
3
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4answers
439 views

How to avoid code duplication for a system which has logic that may change year wise?

What would be the way to design a system which has logic that may change year wise? There is an application which conducts online exams. There are five questions for a particular subject. The ...
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10answers
1k views

Is there really anything to gain with complex design?

I've been working for a consulting firm for some time, with clients of various sizes, and I've seen web applications ranging in complexity from really simple: MVC Service Layer EF DB To really ...
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5answers
10k views

Business Logic Layer in MVC Application

In my ASP MVC application I decided to add another Business Layer and made the model only to have properties. All other functionality like save to db, get from db is done on this new Business layer. ...
2
votes
3answers
5k views

MVVM and service pattern

I'm building a WPF application using the MVVM pattern. Right now, my viewmodels calls the service layer to retrieve models (how is not relevant to the viewmodel) and convert them to viewmodels. I'm ...
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3answers
157 views

Is it okay to just add a page or two PHP page to add some functionality to a Drupal site?

I'm not familiar with Drupal, really. I can dig around the admin interface and navigate the directories and find the files that I need to just fine as well. What I'm really not familiar with is ...
70
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11answers
5k views

Advice on designing web application with a 40+ year lifetime

Scenario Currently, I am apart of a health care project whose main requirement is to capture data with unknown attributes using user generated forms by health care providers. The second requirement ...
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1answer
161 views

Is ROA a specific form of doing SOA?

I have read somewhere that ROA (Resource Oriented Architecture) is SOA (Service Oriented Architecture) with specific constraints added. SOA is the abstract concept of combining discrete pieces of ...
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1answer
304 views

how to architect this to make it unit testable

I'm currently working on a project where I'm receiving an object via web service (WSDL). The overall process is the following: Receive object -> add/delete/update parts (or all) of it -> and return ...