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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1answer
187 views

Synchronization between two systems using MongoDB as changelog

We are developing two related system. One of them (A) will be installed in our customers' machines. The remaining (B) will be used by my organization. Each system has its own database (relational) ...
17
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4answers
376 views

What are the ways to avoid duplication of logic between domain classes and SQL queries?

The example below is totally artificial and its only purpose is to get my point across. Suppose I have an SQL table: CREATE TABLE rectangles ( width int, height int ); Domain class: public ...
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4answers
2k views

iOS chat application design, sending/relaying the message over to the end user

I have a design question. Let us say you were tasked with building a chat application, specifically for iOS (iOS Chat Application). For simplicity let us say you can only chat with one person at a ...
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3answers
53 views

Sacrifice server validation in pos of performance with Rich Client validation?

I recently started to work in a java enterprise project (~200 people) that uses a SWT rich client. In many cases I've found business rules not being validated in server side, because the widgets that ...
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2answers
55 views

How to better define SRP and “wholesome” objects? [duplicate]

Assume you have a class. It can really be any class that defines a domain concept like an employee, a product on an e-commerce site, or a car. One of those examples that are oldies but goodies. ...
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2answers
54 views

Using PHP without mixing presentation logic

I'm conceptually designing a website / application and trying to come up with the correct separation of concerns. The basic technologies I'm settling on are: MySQL, PHP (Laravel), HTML/JS (jQuery). ...
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1answer
214 views

Multitier architecture using API

I have been reading a number of posts and I am leaning towards building an SOA. My main dependencies are: Need to support multiple clients Need individual client environments to not effect other ...
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1answer
98 views

Best approach for managing users that are defined inside the active directory , inside my custom application

I want to start a new asp.net mvc5 Personal Appraisals web project. Now I will have a module inside the system for managing users, and adding info such as primary role, secondary role , main skills , ...
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2answers
221 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 ...
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1answer
94 views

Data serialization architecture, injection on construction vs. on function call

I am creating a data serialization/deserialization mechanism for essentially a persistent storage object. Due to the variety of systems this mechanism could run on, there needs to be a a variable ...
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2answers
68 views

What is a good way to organize service layer classes?

I had a Service layer in my app and, for a while, there's just one class for API calls Current Scenario MyAPI Class authenticateApp() authenticateUser() Looking in the future, that class will be ...
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4answers
4k views

Why is it so bad to read data from a database “owned” by a different microservice

I have recently read this excellent article on the microservice architecture: http://www.infoq.com/articles/microservices-intro It states that when you load a web page on Amazon, then 100+ ...
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1answer
904 views

Separation of retrieving data and business objects between DAL and BLL Layers

I did some research before posting this question. Among other questions or post, one of those is provided below. I could not get a clear mind how to determine.. Business Objects within a Data Access ...
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0answers
31 views

Enterprise WCF Implementation [on hold]

I'm looking for a reference, either a book, or website, where I can gain some knowledge on creating enterprise level web services, specifically WCF. In my searching I haven't found much in relation to ...
4
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1answer
95 views

Message queue vs database for delayed tasks

I need to build a system that can handle a fairly high amount of delayed tasks (e.g. scheduled emails). For non-delayed tasks I would go for something like RabbitMQ. But, is it ok to let tasks ...
3
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2answers
75 views

Shared domain model between different microservices

Imagine a scenario of two different microservices. One to handle Authentication within the service, the other one takes care of User Management. They both have a concept of a User, and will talk about ...
4
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1answer
118 views

Dependency Management in the real world?

Most of the examples i've see when watching anything on dependency management hit what i consider to be the holy grail in that the only dependencies on classes are interfaces that the IOC container ...
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3answers
111 views

What is the most accepted transaction strategy for microservices

One of the major issues that I have seen occur in a system with microservices is the way transactions work when they span over different services. Within our own architecture, we have been using ...
2
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1answer
78 views

Integration between services in a SOA

Assume we have a Bounded Context for Inventory (InventoryBC) and another one for Shipments (ShipmentsBC). These 2 BCs need to communicate together. They are hosted on 2 different services on different ...
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1answer
46 views

Is there a relationship between a data source (JSON) and the Model that consumes it?

I have put together a large quiz data structure. It is in JSON format but I guess it could be XML etc. It may look something like this simplified: { "quiz":{ "title": "Welcome to Quiz" ...
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3answers
653 views

Write data to SQL Server directly from BizTalk or use external service?

An external source will be sending us XML data that BizTalk will pick up and transform into an internal schema. We need this data to be loaded into a SQL Server database as we're going to expose some ...
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2answers
64 views

What is a latency-bound and a memory-bound application in HPC?

I understand that in HPC hybrid systems, for instance a MIC architecture, main memory access is much slower than access to data in own cache or in the cache of another core. I read that HPC MIC ...
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2answers
88 views

Abstracton layer to control services access to denormalized db entity

Our db is optimized for minimum join count (partially denormalized). E.g. our User entity contains account data (nickname, facebook id, etc), user numerical statistics (total games played, total wins, ...
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35 views

SignalR UI updates and group managing

I'm working on a web application and I have 2 specific questions regarding SignalR I need give the UI real-time updates (both broadcast to everybody on the hub, but also just to the original caller) ...
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1answer
108 views

What is an Application Core? [closed]

I have read Patterns For Large-Scale JavaScript Application Architecture by Addy Osmani, and I was suddenly hit by a question about an application core. What is an application core? What makes it? ...
2
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2answers
164 views

Why is modularity a good idea? [closed]

I have a programmer on my team who wants to take all the control flow logic for handling events sent by any module and put it all in a single file, because they think it will make an already-complex ...
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3answers
142 views

Design pattern for different code behaviors according to different clients

At my company, we have a solution composed of a WinForm (multiple per client) and an API (one per client). This solution is deployed on different clients that require the solution to behave ...
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1answer
750 views

Data transfer between “main” site and secured virtual subsite

I am currently working on a C# ASP.Net 3.5 website I wrote some years ago which consists of a "main" public site, and a sub-site which is our customer management application, using forms-based ...
6
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1answer
705 views

Is event sourcing ready for prime time? [closed]

Event Sourcing was popularized by LMAX as a means to provide speed, performance scalability, transparent persistence and transparent live mirroring. Before being rebranded as Event Sourcing, this type ...
2
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3answers
130 views

Performing data operations that involve separate applications and data sources

I'm designing an enterprise application that produces output based on some input data from another application. In this case, I happen to have also built and thus do control the source application ...
4
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1answer
484 views

PCI Compliance, FDMS and TransArmor [closed]

So, I've been tasked to work on an integration project where we will ask customers for credit card information and send it over to our integration partners, who will process the payment/cc info and ...
4
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2answers
5k views

What is the way to go to extract data from websites? [closed]

I've been thinking about a side project that envolves web data scraping. Ok, I read the Getting data from a webpage in a stable and efficient way question and the discussion gave me some insights. ...
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1answer
78 views

HashMap to replace Singletons?

Consider the following: I have controllers and views in a client-application. As this runs purely on the client side, each controller must only exist once. At first I thought about implementing ...
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3answers
1k views

What's so special about x64 and programming x86? [closed]

I know this is a little funny question, but I didn't have the chance to realize what makes any difference when programming x64 or x86 at high level languages (.NET for instance). Any explanations ...
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3answers
1k views

Front-end structure of large scale Django project

Few days ago, I started to work in new company. Before me, all front-end and backend code was written by one man. As you know, Django app contains two main directories for front-end: /static - for ...
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1answer
45 views

Synchronization of resource that has moved out of requests filter range

I have a RESTful API with corresponding clients. If a client request fetches a set of resources (Events) based on a filter, say events taking place between 2015-04-13 - 2015-04-19. If an event which ...
7
votes
2answers
1k views

Where to validate domain model rules that depend on database content?

I'm working on a system that allows Administrators to define Forms that contain Fields. The defined Forms are then used to enter data to the system. Sometimes the Forms are filled by a human via a ...
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0answers
50 views

Passing Data Between Tiers in 3-Tier Architecture

Assuming we are talking physical tiers, my understanding is that in order to pass data from say the data tier to the business logic tier the JSON format is used (or XML), so say I have an ORM ...
2
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1answer
97 views

How, in Three Tier Architecture is Database Access Achieved

So I am attempting to make an application based on the architecture proposed by this image; [1] However, I am getting very confused with how data access is achieved between the data access layer ...
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1answer
57 views

Using session managed application environment vs no protection

First of all sorry for the title, I didn't know how to explain it. So here comes the story; We are bunch of coders, front-end and back-end, and we are going to create this new system, based on ...
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1answer
56 views

What's the difference between a Factory method and Entity Translator

The entity translator provides a function that takes one or more data contract classes as parameters and returns a specific business entity. Within the implementation of the function, a new ...
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3answers
138 views

What categories of software modeling problems is object orientation highly unsuitable for? [closed]

I'm trying to get a better grasp of the applicability of object-oriented programming and design. I'm curious about some examples of situations where object orientation is not simply inefficient or ...
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0answers
22 views

Global Accounts in Multi-Tenant Authorization System

Our system is fundamentally a multi-tenant setup, where each client maintains a separate database with its own data and users. The authentication system on login issues an authentication token which ...
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2answers
68 views

Models, types, different views and meta data

We have a software which purpose is to be used to help users build their own applications. It has to be very loose coupled with the infrastructure: for example, I can imagine users running it on MySQL ...
1
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2answers
332 views

Managing non-domain application behaviour in CQRS

Here's a scenario. I am building QueueUnderflow, a community-edited Q&A site for people who haven't yet grasped the basics of data structures. My users don't like it when people edit their posts ...
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0answers
47 views

Haskell + OpenGL framework

I'm writing a framework in Haskell where I'd like to use OpenGL to draw lines, shapes... I'm encountering a problem defining the structure of my program. I have for example a Polyline type which holds ...
0
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2answers
115 views

Client-Server Application Object with child Objects

Actually I'm going to build an Client Server Application, at the Login I recive the User Object from the Server. An user has a List of tasks, but I don't want to load them at the Login. So what would ...
6
votes
3answers
212 views

Should instance of Employee contain a reference to instance of Office, or should Office contain an array of Employee?

Title is an abstraction of what I am actually doing, but in essence the same. The main entity I will be dealing with are the Employees themselves; "Send package to employee John Doe". In order to ...
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3answers
75 views

Event logging: record a whole message, or a list of properties and generate?

I've written a simple event logging system, which I write to with a function similar to: void IIncidentLogic.ReportIncident( string code, string noun, string hostname, DateTimeOffset ...
3
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1answer
51 views

How do I best query for user-owned data when using NoSQL

Say I have a typical website which provides authenticated users access to their stored ('owned') data. Authorised users must be able to perform CRUD operations on their data. If I were using a ...