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

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6
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344 views

Object Constraint Language (OCL) for Stack in java.util package

I have an exam coming up and I'm looking at past papers to get some ideas of what to expect. I'm a bit stuck on the following one and would really appreciate if someone could give some example ...
4
votes
0answers
61 views

Seeking opinions on using device tree for I/O definition

I've been working ELLCC, a clang/LLVM based development tool chain targeting ARM, Mips, Microblaze, PowerPC, and x86 targets. The tool chain is pretty complete and runs on Linux, Windows, and Mac OS ...
4
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0answers
69 views

Is using partial classes for supporting multiple versions of data entities for continuous delivery scenarios a bad idea?

When you want to have continuous delivery any data schemas that you have must support multiple versions of your application at the same time (as you may have multiple version deployed when new ...
3
votes
0answers
102 views

Refactoring of a client API for avoid duplicated code and unclear passage of parameters

I need to develop an API, the functions of the API are requests that call the service exposed by a server. Initially the API worked like this: class Server: def firstRequest(self, arg1, arg2): ...
3
votes
0answers
58 views

Go - idioms/design for determining when an unknown number of goroutines are complete

I have a workflow wherein I walk recursively through a bunch of directories, then for each file perform some action. I'm using goroutines to walk each directory, and also to process each file. The ...
3
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0answers
167 views

Design for an application framework that will allow each implementation to customize parts of the UI

I am tasked with designing an application framework that will allow each implementation to customize parts of the user interface. One such example would be that the implementation (let's call it ...
3
votes
0answers
119 views

Should I inject a data dependency into an Angular Directive?

I am currently implementing an AngularJS directive. It is fundamentally a reusable widget comprised of a select box and a table which populates based on the item in the select box. My point of ...
2
votes
0answers
49 views

Log with Application Insights only (NLog vs AI) in Asp MVC

I was going through several blog posts and stackoverflow and programmers and I am still a bit confused. You can install NLog (or some other logging lib) and start logging quite fast and then you can ...
2
votes
0answers
103 views

Architecture for Web application to monitor remote servers

So I'm a relatively new programmer, attempting to create a web application (ASP.net) to display the system information (E.G. Status of windows services, disk & resource usage and errors in event ...
2
votes
0answers
31 views

Should my application call statsd directly or should I call statsd based off logs?

I'm planning on incrementing counters in statsd based of various events within my application. I have logging in place for these events. So, from my viewpoint I have two options: Update the ...
2
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0answers
39 views

Handling of messages with several indicators

I am currently working on an application, which will show several messages (alarms - warnings - hints) on a cable-connected display. As these messages depend on several indicators I have to decide ...
2
votes
0answers
58 views

Displaying complex objects in Angular

What in your opinion is the best way to display complex objects in Angular? You have some sort of return from a service used in multiple places in a app and you might have to display multiple ...
2
votes
0answers
41 views

Analysis of ways to control/refresh a directive with isolated scope from parent controller

I'm asking this question because there doesn't seem to be a "recommended" approach for this. If a page had a directive with isolated scope, and if the directive needs to update itself after an event ...
2
votes
0answers
356 views

Architecture design for Java servlet that triggers work (for sending push notifications)

I'm designing a push notification server (for pushing notification via APNS and Google servers) and have come up with the following design for a Java based web application server. I would really like ...
2
votes
0answers
160 views

The Python module-as-singleton hack

I've seen (and once used) this idiom a few times in Python: # At the end of a module: if __name__ == '__main__': main() # or whatever your entry point looks like, this line isn't important else: ...
2
votes
0answers
234 views

How can I put multiple hierarchical forms in a single web page and avoid making it a mess?

We are a group of developers working on a web application that accepts forms filled and sent by our users and present it in an overall view. Our main form view looks like this: There are multiple ...
2
votes
0answers
257 views

JS closures - Passing a function to a child, how should the shared object be accessed

I have a design and am wondering what the appropriate way to access variables is. I'll demonstrate with this example since I can't seem to describe it better than the title. Term is an object ...
2
votes
0answers
72 views

Pattern for data types that are related yet fundamentally different in utility

Background I'm currently working on a codebase for what is to become a forthcoming website's content "engine", where it will take in different types of standardized data (implemented with XML), parse ...
2
votes
0answers
124 views

What are some important considerations when developing a DBaaS (DataBase as a Service)

I'm interested in creating a Database as a Service. I want users of the service to be able to do a few seemingly not very simple things. Sign up and be given access to a JSON datastore that they can ...
2
votes
0answers
160 views

UML diagram for an existing implementation

I have some code, which I want to present in UML, but I've stuck at one point. Let me tell you something about code's functionality. I have a workspace in which I can place some Components, select ...
1
vote
0answers
32 views

Designing a web based smart card publisher

I'm working on an application that's supposed to have a web based GUI where you can insert some data. That data will be saved in persistent storage and a hex number generated and stored alongside. ...
1
vote
0answers
36 views

Using events and event subscribers to create windows in a desktop application

I should probably open this by saying I do mostly Web applications at work, which obviously have some major differences from typical desktop stuff. I had a small Windows Forms program I'd made for ...
1
vote
0answers
22 views

Feedback on simple authorisation system design

I'm writing a fairly simple authentication/authorisation api for an intranet application we are developing. It's my first roles based authorisation system and its a good opportunity for a first ...
1
vote
0answers
47 views

What's the best way to create a two-level library, containing a class with different levels of abilities?

I would like to create a library consisting of two layers, lets call them A and B. There should be a class "Sample" in layer A. Layer B also knows about class "Sample" and enlarges it by some methods. ...
1
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0answers
47 views

Universal Modules GUI Design

PROBLEM: GUI built above database entities usually consist of creator window (pane etc.), editor window, maybe grid or other view window. To represent an entity for user it usually requires building ...
1
vote
0answers
125 views

MVVM viewmodel to view correlation in adaptive UI

I am making an mvvm application for the uwp platform and I am looking for advice on the following matter. Take for example the windows 10 e-mail application, which when full screen displays both the ...
1
vote
0answers
108 views

ASP.Net MVC - Implementing a Test Environment

I would like to implement some sort of test environment for ASP.Net projects. I am trying to implement this as an alternative to mocking the entity framework. Here is what I am trying to achieve : ...
1
vote
0answers
247 views

Abstract Alert Dialog Builders (Same Method Calls, Different Objects)

Currently I'm working on an Android library that creates a dialog which allows to select colors from a palette (examples at the end) and I've stumbled upon an interesting design problem. To create ...
1
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0answers
74 views

If the externally callable interface of a class is called its API, what is “what can be overridden” called?

It's about what the class gives access to through inheritance. It has a three letter abbreviation but not API. I've seen this before but can't remember at the moment. The term is usually used in ...
1
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0answers
59 views

How to expose the domain model as options to drive the view behavior

First off, I'm not thrilled with the title, so I'm open to suggestions there. Here's my question: I'm designing a simple application that takes input from a user and produces an output document. ...
1
vote
0answers
80 views

Should all public API POCO value-type properties be nullables?

I use nullable value types a lot when designing classes that have properties which may remain null, i.e. when the object is being persisted. For example: public int? MyProperty { get; set; } My ...
1
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0answers
65 views

what is the best method to return db query and additional information from other methods

I am new to MVC and trying to continue to learn base on best practices. I am trying to return data from multiple sources -- one source being a mysql db query and another source from another method ...
1
vote
0answers
65 views

Help design this data import program

I want to import some data from various locations and pump it into MongoDb and some cloud services. The data starts off as JSON, I read that JSON, create some objects in mongo, go to the next level ...
1
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0answers
70 views

Designing an Action abstract class with GUI

I have an Action class, where an Action can do a range of things, including: Performing a sequential list of other actions Performing an action if a condition is true Allowing the user to pick ...
1
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0answers
79 views

Maximizing reuse out of a function primitive in CUDA

I'm working on the implementation of a few related algorithms in CUDA, all of which require a primitive that we'll call f(). The related algorithms can't simply call f though, as they require f to ...
1
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0answers
67 views

Improve communication between controller and trackers in a Twitter fetcher tool using RabbitMQ or Apache Flume

I've been working for a time with some researches developing a tool to fetch tweets from Twitter and process them in some way. The first prototype "worked" but became a pain as we used sockets to ...
1
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0answers
53 views

Individual methods or parameters for Google Analytics abstraction on Android

A coworker and I are having a discussion around the best way to build our abstraction on top of Google Analytics for an Android application. A couple of data points. We have auto-tracking enabled ...
1
vote
0answers
356 views

JavaScript program design: to what degree should I separate logic and display?

Consider you wanting to implement a simple game of checkers. There would be a rectangular game board and the player would able to move the pieces around according to a particular set of rules. ...
1
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0answers
165 views

How to separate out below tightly coupled classes

I have two classes which are somewhat tightly coupled to one another. Lets call them A and B. A derives from C and B derives from D. B is the class whose instance is created by the system and then B ...
1
vote
0answers
187 views

Design architecture and software for webapp integrating with few other endpoints (Email Server, Jira, CRM system)

In my upcoming project, I need to integrate a webapp with few other endpoints. Main duty of the webapp will be some kind of thin-client for inner JIRA system for company. Moreover, I'll need to ...
1
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0answers
60 views

How to clean composition root from anything other than object construction?

I'm doing poor man's DI (manual injection) in my application. My (pseudo-) composition root looks something like this: var connectionSettings = new Settings(SqlParameters) var dataLoader = new ...
1
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0answers
172 views

Am I following a good design thought process? Is the Abp framework overkill?

As I finish one project and start another, I have a small time window to come up with an architecture for the new. I am coming from the following design: Web applicationReceives domain models & ...
1
vote
0answers
192 views

Is one of these the more “Angular” way of communicating with a directive?

I am working on a project where I would like to encapsulate a directive library and distribute it to other developers to use. I would like to keep the changes to the model within this encapsulated ...
1
vote
0answers
234 views

How far to go when future proofing fluent-method-chained-DSL test code?

Is it worth implementing interfaces, or using the getThis() trick, or even static factory methods to future proof against the need to extend this DSL? The current design is a pair of thin ...
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0answers
269 views

Properly design program database to reflect organization structure

I'm having trouble setting up my program's database the 'right' way. I was hoping you guys could give me suggestions on doing it properly. I am creating a database+client for a non-profit organization ...
1
vote
0answers
123 views

automated acceptance testing / BDD & workflow for designing a system

Recently, I started reading the book Specification by Example, which relates to automated functional testing and BDD (from what I've understood till now). I've tried using Concordion (.Net), and ...
1
vote
0answers
31 views

method of validating sanity of order dependent values received asynchronously

I have a series of hardware devices that I'm connecting to create paths through. I have some sanity checking to make sure if potential paths are valid and will do what is intended, but to do it ...
1
vote
0answers
118 views

How to implement 'use case control' object in (iOS) MVC?

In an MVC architecture pattern (for e.g., in iOS) there is a controller per view. In UML there is a concept of having Control object per use case to encapsulate an use case, which may span more than ...
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0answers
132 views

How to evaluate Secure Authorization for server to client

I have a customer that wants me to build a web portal (Asp.net 4.0) that will communicate with a desktop client, tablet and/or smart phone (e.g. iOS and/or Android). I was thinking of using oAuth ...
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0answers
527 views

Is OAuth (2.0) is the right choice to make WCF WebService secure?

I have WCF webservice which serves to various mobile application. This was implemented with typical HTTPS/SSL. But there are some cases like Replay Attack needs to be considered in the security ...