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

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3
votes
1answer
89 views

What is the benefit of offloading email to a transactional mail service?

Why do so many people recommend offloading email to a transactional service such as Mandrill, Postmark or Sendgrid? Is sending email via smtp really that much slower than sending a request out to ...
5
votes
4answers
380 views

What types of processes have to be reflected in flowchart?

In visual programming, there are many events which support our application tasks. So, along with user defined processes, should these also be in flowchart or not? What about the constructors of ...
3
votes
3answers
269 views

When presenting a software design to upper management

I'm presenting a software design for approval today and as I'm going through the hundreds of pages of design documentation, cherry picking what's important, I'm unsure if I should start with the ...
1
vote
2answers
128 views

Validating objects with each other - Design Pattern needed

I am running a zoo application. My zoo includes an abstract class of 'animal', and several deriving classes - 'zebra', 'elephant', 'orangutan', 'baboon' and so on. Of each class I have several ...
4
votes
3answers
278 views

Dependency Inversion Principle vs “Program to an interface, not an implementation”

I'm trying to understand how the Dependency Inversion Principle differs from the "program to an interface, not an implementation" principle. I understand what "Program to an interface, not an ...
0
votes
2answers
64 views

Container/Item pattern without `friend`

I have a class Container containing objects of type Item. They are different classes, and especially they have no common base class (e.g. a Container does not itself have a Container).: class ...
4
votes
1answer
200 views

If TDD is design, how do you know your TDD is well designed? [duplicate]

Given a large group (50+) of programmers: All given the same problem, All using Test-Driven Development (TDD), All pair programming, All doing group-based code review, I have personally seen the ...
1
vote
1answer
171 views

Cloud differential backup

I am responsible for the design and development of a cloud backup application. Currently we are using xDelta to do differential backup so that only the changed parts of the files gets uploaded. This ...
0
votes
0answers
31 views

Best approach for a server configuration data collection and reporting solution from a legacy script?

I have a project which involves collecting config data from windows servers in our (very large) server estate. My manager wants me to collect over 150 data items across all configuration areas ...
2
votes
2answers
520 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 ...
6
votes
6answers
491 views

Object model design: collections on classes

Consider Train.Passengers, what type would you use for Passengers where passengers are not supposed to be added or removed by the consuming code? I'm using .NET Framework, so this discussion would ...
7
votes
7answers
1k views

Object-Oriented Class Design

I was wondering about good object oriented class design. In particular, I have a hard time deciding between these options: static vs instance method method with no parameters or return value vs ...
3
votes
3answers
152 views

Help with design structure choice: Using classes or library of functions

So I have GUI Class that will call another class called ImageProcessor that contains a bunch functions that will perform image processing algorithms like edgeDetection, gaussianblur, contourfinding, ...
1
vote
1answer
95 views

Which to implement first: GUI or backend? [closed]

So, I can code both, but which should I use a base for development? In terms of TDD, should minimal aspects in the GUI be used as the seed from which to grow towards backend logic? or should the ...
0
votes
1answer
197 views

can you have too many dto/bo - mapping method

I have a windows service, 2 web services and a web interface that need to follow the same path (data wise). So I came up with two ways of creating my solution. My concern is the fact that the ...
33
votes
9answers
27k views

Why use partial classes?

In my understanding, the partial keyword does nothing but allow a class to be split between several source files. Is there any reason to do this other than for code organization? I've seen it used for ...
0
votes
3answers
97 views

Can MVC implementations differ in design-details and still be considered MVC implementations?

Is the Model-View-Controller pattern very strictly defined, to it's design details? Or is it a term, like many others, with lots of different interpretations and versions (that all fit the ...
0
votes
0answers
65 views

Algorithm / working approach to get a random list of data

I am working on a android schedule app but that isn't matter , the problem is a algorithm / methodology so you are welcome to just write the pusedo code to answer. The data is like this Place ...
4
votes
2answers
285 views

How to enrich a simple two endpoint SOAP application to become enterprise level?

Imagine you have some exchange of data between two endpoints (webservices or let's call URL). Data can travel in any way (Xml, Json, GET, POST) it doesn't matter. I've got the source code of the ...
0
votes
1answer
50 views

Contradiction of layered design and global data access for analytics reporting

While developing an application (mobile app for Android), our team always strives to use best development practices such as interfaces, layering and separation of concerns. When it comes to reporting ...
0
votes
0answers
49 views

Strategy for Website Talking to API on Same Server

I have a RESTful API that allows retrieval of data through requests such as GET http://example.com/users/id/1 (Coded following this tutorial). The code igniter controller looks like this: class ...
0
votes
0answers
14 views

Design for running active x components from local server

I have a requirement where some of the training scripts (active x components) needs to be rendered on the client application (IE 8). Till now the server was hosting these scripts using IIS and IE was ...
2
votes
2answers
282 views

How can I refactor client side functionality to create a product line-like generic design?

Assume the following situation similar to that of Stack Overflow: I have a system with a front-end that can perform various manipulations on the data (by sending messages to REST back-end): Posting ...
1
vote
1answer
147 views

Designing software functions which are both pausable and restartable

Consider the following situation: One hardware device, two applications (1 C# application, 1 Firmware). The C# application sends frames to the firmware and the firmware executes scripts. C# -> ...
0
votes
3answers
127 views

Need advice on design in Ruby On Rails

For personal educational purposes I am making a site for a conference. One of the object that exist in a conference is a session, which has different states and in each state it has slightly different ...
0
votes
1answer
57 views

DB Design: How to link a single column to a collection of entities

I have a db design question that I am sure has been quite extensively covered but I cannot find a good answer already. The problem is how to efficiently link a single school course to a collection ...
0
votes
1answer
166 views

Is it fine to skip MVC?

I am building a pair of components that communicates in a one-way fashion: [ JButton ] --> data...process...process...out --> [ JTextField ] The JButton allows the user to select a file and ...
1
vote
3answers
319 views

Should I pass array or pointer?

I am writing a C++ library (but prefer C style interface functions) and one of the function returns array of floats. I am not sure if I should pass pointer or fixed array to get this data? // in the ...
22
votes
4answers
4k views

How prototypal inheritance is practically different from classical inheritance?

Inheritance, Polymorphism, and Encapsulation are the three most distinct, important features of OOP, and from them, inheritance has a high usage statistics these days. I'm learning JavaScript, and ...
5
votes
7answers
858 views

Should static data be stored in a database or somewhere else?

I'm working on some software at them moment and I'm not sure which route to take with this. I have some data to store somewhere on a mobile device. The data will never change, and has a hierarchical ...
5
votes
1answer
226 views

Layers and layers of SOAP

I am designing the back-end to a SOAP web-service and have a question about how I am thinking of doing it. I am going to go with a simple layered design which consists of 3 separate layers. Layer 1 ...
2
votes
2answers
148 views

Injecting dependencies (DI) in c++ applications

I am playing with dependency injection, but i am not sure I am doing it right. Especially, I am not sure what should be the correct way to build classes with injected dependencies. Say I have a class ...
18
votes
5answers
785 views

How do searches fit into a RESTful interface?

When designing a RESTful interface, the semantics of the request types are deemed vital to the design. GET - List collection or retrieve element PUT - Replace collection or element POST - Create ...
1
vote
2answers
84 views

Initialization of objects in a system using dependency injection

This is a follow up question to the following post: Injecting dependencies (DI) in c++ applications In a system that uses DI, someone, somewhere should be responsible to create the various objects ...
1
vote
1answer
65 views

Reflecting on finished project with no other technical criticisms?

I'm a coop (in college but I work 3 months, then do classes for 3 months, work again for 3 months, etc until I graduate) at a company in their IT department. My job usually has to do with writing ...
4
votes
5answers
247 views

How to design my code so that it can use alternative information to help create an object

I have a class named Product, which takes a product model number and number of wheels for that product as part of its creation information, and then it instantiates the product by doing a computation ...
4
votes
2answers
97 views

How to structure many projects that can be versioned and deployed separately

My team is in a situation where we need to create about 30 different processors. By processors I mean code that takes data from a DB and sends it to a remote service somewhere else in the world. They ...
0
votes
1answer
55 views

How to design a scriptable communication emulator?

Requirement: We need a tool that simulates a hardware device that communicates via RS232 or TCP/IP to allow us to test our main application which will communicate with the device. Current flow: ...
2
votes
3answers
111 views

At what point does data access\manipulation logic becomes business logic?

Consider a service which updates PersonDetail tables in database. I am Using EF which maps the table to this Entity. When a record is updated, it is not actually updated but a new record is created ...
2
votes
5answers
155 views

Is it bad software design to mix JDBC SQL calls and use an ORM in an application? [closed]

Is it bad software design to have JDBC/raw SQL and also use an ORM? I don't mind using an ORM for boilerplate CRUD, but some queries are better in SQL (for me). I'm not arguing for or against ORMs. ...
1
vote
1answer
41 views

Removing dependencies on subclass-specific behavior

I have a Message class which can contain multiple types of payloads (or sometimes no payload), each derived from a common Payload class. However, this becomes problematic because the Message class ...
20
votes
2answers
3k views

What are the advantages of prototype-based OOP over class-based OOP?

When I first started programming Javascript after primarily dealing with OOP in context of class-based languages, I was left confused as to why prototype-based OOP would ever be preferred to ...
0
votes
2answers
149 views

Application qos involving priority and bandwidth

Our manager wants us to do applicaiton qos which is quite different from the well-known system qos. We have many services of three types, they have priorites, the manager wants to suspend low priority ...
20
votes
8answers
910 views

When do you rebuild an application or keep on fixing the existing one [duplicate]

Possible Duplicates: When is a BIG Rewrite the answer? Have you ever been involved in a BIG Rewrite? I am at a customer where I have been tasked to fix a number of issues they have in their ...
-1
votes
1answer
93 views

Should We Use Surrogate Primary Keys for Every Table? [duplicate]

We are developing a data model for a marketing database that will import transaction, customer, inventory, etc. files and the directive is ONE process that works for every client. We have been told ...
0
votes
2answers
311 views

Why are header files bad design? [duplicate]

this says header files are bad design, but I don't know why. The answers specified there are about the inefficiency of header file when building. Why it is bad design is not really touched upon. As ...
2
votes
1answer
106 views

Logging in a latency sensitive system

Requirements: My application is latency sensitive. Millisecond level responsiveness matters. Not all the time, but when it acts, it needs to be fast. My application needs to log information about ...
8
votes
11answers
727 views

Is a designer supposed to write CSS code? [closed]

I'm wondering if the CSS creation is supposed to be the job of the designer or the programmer. I'm not talking here about really complex CSS layout, I'm referring more to skinning. So is this ...
1
vote
1answer
72 views

What is the idiomatic way to persist the data in this simple data-based application?

I'm looking at developing a simple application in Java for a game which allows a user to keep track of which items they own and how much experience they have obtained while using the item. All of this ...
0
votes
2answers
308 views

What's a good way to share assets between designers and developers? [closed]

Preferably something with project management and version control, and as easy to use as possible. I'm talking mainly about graphic assets, but it can be any output from a designer that needs to be ...