The architecture tag has no wiki summary.
2
votes
3answers
53 views
Pattern for group of entities with one required primary member
Given a parent entity with a collection of child entities where there must be exactly one primary child of the group?
To make the question more concrete, I've seen a number of ways that this pattern ...
3
votes
1answer
52 views
How would you represent an object that can be of multiple types, when storing it as a document in MongoDB?
Somewhat related to this question, say that I have an object category which, depending on which type of object I have, has different restrictions on what it contains. (if you can reword the previous ...
0
votes
2answers
80 views
Which books are good resources for designing APIs
I am looking for a book on how to design a web-service API. I'm constrained to using RPC-style Web services.
In particular, I'm looking for guidance on
[balancing...] granular vs course services
...
4
votes
0answers
98 views
what is the fastest way to find similar records from different (big) data sources [migrated]
I work for a public health agency that has lots of different demographic datasets--stored in SQL sever, Access and Excel. I've written an application that allows people to find 'matches' in those ...
1
vote
4answers
156 views
About shared (static) Members and its behavior
I just realized that I can access shared members from instances of classes (probably this is not correct, but compile and run), and also learn/discover that, I can modify shared members, then create a ...
9
votes
9answers
442 views
Should developers be expected to compile an internal library before the actual program?
Recently a senior developer that I work with made a case for requiring that developers get the latest version and compile as part of their project a major internal library. This stands in contrast the ...
10
votes
11answers
824 views
Is continuous creation and deletion of tables a sign of an architectural flaw?
Recently I had a discussion with a developer who mentioned that during program development, they routinely create and delete tables and columns on a regular basis while working on new features and ...
1
vote
2answers
71 views
Is there a problem with writing an in-memory DAL for testing the BLL/ViewModels?
Mocking the DAL/Repository that I pass to the BLL/ViewModels for testing purposes is not much different than creating an in-memory DAL. Right now I'm using an in-memory DAL in a new project instead of ...
4
votes
4answers
198 views
Business Objects within a Data Access Layer
So I've been creating a data access layer via TDD and have approached somewhat of a concern. I'd rather not start down the wrong path, so I figured I'd ask you guys to see if my thoughts were in line ...
3
votes
2answers
133 views
How would you architect an application which is largely a collection of flowcharts?
I am working with a history teacher on a history app. He has like 200 flowcharts that he wants to put into the app (among other things). The two likeliest-looking ways to do it:
HTML/CSS. The big ...
5
votes
3answers
119 views
Proper terminology for a small set of tightly coupled classes?
What is the proper terminology for a small (2-4) set of tightly coupled classes? These classes can't work independently.
I was thinking system, but after googling for a bit, I've determined that the ...
0
votes
1answer
212 views
What is a reasonable number of threads for a Java program?
In Java (or probably most other languages targeting the JVM) what is a reasonable number of threads to use? Presumably, this will be expressed as a ratio to the number of cores/processors available, ...
29
votes
5answers
1k views
Re-inventing system design for Scala
Many, many, moons ago, I did my masters in Object Orientated Software Engineering. I covered everything: project initiation, requirements, analysis, design, architecture, development, etc, etc. My ...
4
votes
2answers
146 views
Asynchronous Java
I'm wondering if I wanted to implement a web service based on java that does web analytics, what sort of architecture should I use. The actualy processing of the Big Data would be done by Hadoop.
...
2
votes
2answers
52 views
Creating a line of business application with Visual Studio Isolated Shell
I ask this to the pros out there - Is it feasible to build a new LOB(Line Of Business) application with VS Shell as an stand alone application.
There are some points that I thought needs to changed, ...
3
votes
2answers
114 views
What is the best technology for a TRULY portable REST client
I develop a suite of productivity tools, for Mac, iOS and Windows. They all communicate with a sync server via a RESTful interface (using Protocol Buffers), but as we add new platforms, we realize the ...
4
votes
2answers
111 views
Choosing right technology for messaging system
I'm working on a messaging system for two years now, the system was written by a long ago gone team and involves emails and document processing. The basic process is:
Receive an email, parse it, ...
7
votes
3answers
282 views
Is the architecture of my project a common one? What's its name?
I am responsible for a software project for a few years now (a Java desktop application, which is mostly event-driven). I started it from scratch, and at the beginning of this project I made some ...
2
votes
2answers
93 views
GUI architecture and class naming advice
Problem:
I'm working on coding a few light-weight touch-tablet games and often get stuck with difficulties naming my user interaction/interface classes and their relationships with each other ...
5
votes
1answer
171 views
What other patterns can I use for this singleton?
I have a bit of code which uses a plugin and core model, revolving around four major objects: the Core, Server, Logger, and Parser, in slightly particular order.
The Core acts as the central factory, ...
46
votes
7answers
1k views
What is the most effective way to add functionality to unfamiliar, structurally unsound code?
This is probably something everyone has to face during the development sooner or later.
You have an existing code written by someone else, and you have to extend it to work under new requirements.
...
5
votes
2answers
163 views
Static Analysis tools to detect architectural patterns
Currently for school we are working on a research project. The central question of this project is: Which architectural patterns can be detected using static code analysis? With architectural pattern ...
0
votes
0answers
27 views
Mapping Expressions in Linq [migrated]
I am playing around with mapping Linq Queries on my business objects to my Entity Framework database. Has anybody else gone down this road - or more to the point, is there a better way to go about ...
3
votes
4answers
180 views
How can I design an application so that it works well with a database selected by the customer?
I want to write an ASP.NET 4.0 application with IBM DB2 Express-C as its back-end. One thing that worries me, is hosting this application on a remote server. I don't know any hosting provider who ...
7
votes
2answers
207 views
Should the controller pass data to a view in the MVC pattern?
I work with ASP.NET MVC (and other web-based MVC implementations) quite often, but this is something I've never been sure of: Should controller and view communicate?
Of course the controller should ...
0
votes
2answers
127 views
LINQ TO SQL or ADO.NET? [closed]
What is the best choice LINQ TO SQL (.DBML) or using ADO.NET with procedures for a database with 29 tables and about 30 concurrent users that will run the system that I am going to build?
I know that ...
0
votes
0answers
18 views
Highly Concurrent Storage System [migrated]
Imagine your requirement is that you have 3 huge tables (structured data) with say 30 billion rows in each (total size of 4TB) and your many concurrent users (which are parallel os threads on remote ...
1
vote
1answer
75 views
Where should I locate the cache in a WCF service?
I am going to build a Windows Communication Foundation (WCF) service using Microsoft Enterprise Library for caching. I am wondering whether or not I should put the cache in the service layer. If I do ...
7
votes
4answers
226 views
Abstract methods vs instance variables for reusable objects
I have quite a bit of Java code that I'm re-working to be re-used. The problem is that there are many pieces that are project specific so there are ends up being a higher level of coupling between ...
1
vote
1answer
55 views
How to prevent corrupting an hierarchical XML tree?
We have an XML tree which stores the relationship between folders and video files. So each folder could be the artists name and below it we have the videos of the artist. Also each folder can have ...
3
votes
2answers
102 views
How to do locking and not use a database?
I have a project which involves re-writing pretty much all the back end of a legacy application. It uses XML for persistence and was originally written as a single user system.
With one large XML ...
2
votes
1answer
90 views
Entity System - interaction between systems
I am studying the Entity System architecture philosophy. As I have read about it, a typical entity system has:
1) Entities - which are merely ID tags which have a number of components
2) Components ...
15
votes
7answers
261 views
S.O.L.I.D., avoiding anemic domains, dependency injection?
Although this could be a programming language agnostic question, I'm interested in answers targeting the .NET ecosystem.
This is the scenario: suppose we need to develop a simple console application ...
9
votes
4answers
259 views
Is it better idea to call an external command-line application or to internalize that application's logic?
I have a "pipeline" sort of process that is essentially just linking together a bunch of existing tools to automate a workflow. For one of the steps, there is an existing command-line tool that ...
5
votes
3answers
357 views
PHP web application architecture/design [closed]
I've been thrown head-first into a new job developing web applications in PHP. I'm by no means new to PHP, but I haven't developed large-scale applications before. I'm wondering how to structure my ...
36
votes
10answers
1k views
What can one do when “lead by example” doesn't work?
I have been working for a big company (8000+ employees) for almost 2 years now, and was hired just after I finished my study course.
Everyone here has to deal daily with legacy code which is often ...
2
votes
0answers
82 views
Why are people Discounting a BL in MVC Applications [closed]
Ok, I'm used to always putting my BL related logic in a BL of course. But now with MVC, where do you put the BL logic...in a BL right!?
I don't get why some people are discounting having a BL ...
4
votes
6answers
171 views
What should be the “depth of design”?
We all know that the process of creating a design and the whole architecture of the software is very important before writing the code. But how deep should be dive into the design stuff - should we ...
21
votes
11answers
1k views
Is it possible to write software that doesn't need to be continually modified?
I have written a lot of software in many different languages, and I've also "written" hardware for use with FPGAs using Verilog and VHDL.
I tend to enjoy writing hardware more than software, and I ...
3
votes
1answer
153 views
Architecting an organization's web strategy. What is the preferred method here?
I'm working on a solution for an organization that needs to last them long term (as subjective as that is).
They currently have a Joomla installation whereby the CMS talks directly to the database, ...
1
vote
1answer
89 views
How should I extend an existing Service?
Our system's main functionality is encapsulated in a service, let's call it X.
There are requests coming in to X-Manager service which deal with all validations and security issues, and activates X's ...
7
votes
4answers
380 views
Is there really such a thing as “push”?
Once you escape the realm of electrical signals and are dealing with software, is there really such a thing as a "push" architecture where there isn't periodic polling?
I can't think of any design ...
3
votes
2answers
84 views
Is there a design pattern for modelling job execution flow?
In my application I have a set of jobs to execute:
Each job goes through the states "not started", "started", "completed", "failed" etc.
Each job has a set of pre-conditions and post-conditions.
...
-2
votes
1answer
87 views
Developing a (somewhat) domain inspecific application
I am working an on application that has uses in various domains.
In most of the domains what the users what to do with the system is the same but some things differ slightly, ie. some domains require ...
16
votes
6answers
684 views
Can manager classes be a sign of bad architecture?
Lately I've begun to think that having lots of manager classes in your design is a bad thing. The idea hasn't matured enough for me to make a compelling argument, but here's a few general points:
I ...
-2
votes
1answer
174 views
When should I use the repository pattern? [closed]
I'm new to concepts of design patterns, and I'm not clear about when I should use the repository pattern.
What is its purpose, and how can I recognize when it's time to use it?
7
votes
3answers
126 views
How big should OSGi bundles be?
Or more completely "What are the trade-offs and questions that should be raised when trying to decide the bundle structure of an OSGi application?"
Our existing OSGi bundles have tended to be quite ...
1
vote
1answer
209 views
Books that every software system architect/data modeller must read
I hope I'm not confusing the term system architecture with the data model/database.
Is there a book out there that's the standard for describing best practices, design methodologies, and other ...
0
votes
1answer
70 views
How to deploy a heterogeneous server application to customers?
We have a bigger application server which customers would like to have deployed locally.
It consists of an MySQL server database, a REDIS database, multiple Web servers for sub parts, a NGINX reverse ...
6
votes
2answers
343 views
How to structure this program?
I am struggling with the best way to structure a program that I am writing because the method I currently have feels very clunky and each part depends a lot on the others. This is what the program ...
