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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DDD / Optimizing a specific service belonging to a specific bounded context regarding hardware

Well known is the split of a whole application into several bounded contexts to emerge an Ubiquitous language. while practicing Domain-Driven Design. In general, 1 bounded context = 1 archive file ...
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1answer
217 views

How to make my code decide which class to instantiate based on a parameter?

I have a system in which I will perform queries to a database. I want Query1, Query2 and Query3 to use the same methods in their way to the data source layer. To do that I would like to make ...
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1answer
883 views

Best practice for projects architecture - server side [closed]

The usual way (that I'm familiar with) to divide the server side is the n-layer architecture : DAL - data access layer, usually has the Entities and the context (and maybe include also a repository) ...
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1answer
465 views

The problem of dependencies management

Let's consider the next situation: We have a module A which has a class Crt570 intended to interact with a device. We have a module B which uses Crt570 in the class called M100Communicator. We have ...
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1answer
145 views

A specific problem with architecturing a part of our application

Firstly, I'll try to describe the real world model of what we are trying to express in C# code. We have a device called M100. It's purpose is to read\write data from\into cards (plastic or ULTRALIGHT ...
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2answers
149 views

Refactoring sought for replacing shared data types in .NET component

I am in charge with updating a software product that is made up of two components the Controller process and the UI process. The Controller and the UI communicate via XML messages. Furthermore, the ...
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62 views

Make a monolithic architecture in something modular

Currently my architecture is a monolithic block that handles a really specific duty. Now it needs to be generalized. Right now it handles a request and all processes (1 or many) associated to it. ...
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2answers
81 views

Client/server model where the server rejects connections from *newer* clients

I'm using a piece of commercial software where the server will reject any attempt to connect to it from a newer client. In other words, you can use version 8 of the client to connect to a v10.0 ...
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2answers
2k views

DDD - Domain Driven Design, which development order should be applied?

1 - Design my entities, ie (in python): class Account: def __init__(name, author): self.name = name self.email = email 2 - Design my repositories: (as interface) class ...
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1answer
281 views

Why are JOINS deprecated for a in-memory database?

Correct me if I'm misunderstanding. Refer to the following sentence: Stack Overflow copied a key part of the Wikipedia database design. This turned out to be a mistake which will need massive ...
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11answers
5k views

Ensure that each class has only one responsibility, why?

According to Microsoft documentation, the Wikipedia SOLID principe article, or most IT architects we must ensure that each class has only one responsibility. I would like to know why, because if ...
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1answer
754 views

calling an abstract method in abstract class

Suppose i have an abstract base class Parent which defines an abstract Method A(some parameter) taking a parameter, also it defines an instance Method B which calls method A(parameter) inside its ...
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1answer
2k views

Domain driven design and WCF services architecture

I am trying to figure out how to architecture my project in the DDD paradigm (a complete beginner in DDD) and stumbled upon a problem about the implementation of the web services... These are some ...
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5answers
1k views

Fighting technical debt as the “lowest developer”?

Let's say you work for a company and what you do is develop software for them. You have no idea of the big picture or maybe slight. What you do have are tasks assigned to you via issue tracking ...
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2answers
336 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
429 views

Backing up messages in S3 within a Storm topology

In my project we are trying to build up a KIND-of-a-lambda storm based architecture. The component would be responsible for indexing the site usage events so we expect a quite massive random load. The ...
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1answer
66 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 ...
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0answers
173 views

Schemaless NoSQL RESTful design?

In a recent project; I used MongoDB with MongoEngine (an ORM/ODM for Python). This allowed me to specify schema in a central "Model". My new project I am hosting on Windows Azure; and there is no ...
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3answers
153 views

Question/Answer for multiple Users - How should I design it?

I'm wondering about a good way to deal with a Question/Answer - Model for multiple Users. My goal is to have an efficient and readable model where all the results of my users are stored. Every user ...
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3answers
263 views

Entities optional relations: separate classes or single class?

Lets focus on a domain object that is related to more other (different!) entities. Sometimes we need one relation and sometimes the other. Let's be agile and say: we don't know in a front how many ...
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2answers
264 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: ...
5
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1answer
93 views

How to Recover from Inconsistent Job State without Database Polling

I'm working on scaling an application which is currently polling a mySQL database to send async jobs to a background processing system. A state machine is being used to keep track of the entities ...
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1answer
162 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 ...
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1answer
343 views

Database design: circular reference but dynamically created

I am trying to design database for this case: Assignments have vectors, relation is 1:N Assignments have submissions, relation is 1:N Submissions have executions, relation is 1:N Every execution ...
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3answers
12k views

Mapping between 4+1 architectural view model & UML

I'm a bit confused about how the 4+1 architectural view model maps to UML. Wikipedia gives the following mapping: Logical view: Class diagram, Communication diagram, Sequence diagram. Development ...
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0answers
155 views

Video conferencing server architecture

I am developing a video conference application with the following requirements: Audio works like call conference, where all participants may talk at the same time. However, video works like ...
3
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1answer
141 views

Architecture for a template-building, WYSIWIG application

I'm building a WYSIWYG designer in Ember.js. The designer will allow users to create campaigns - think MailChimp. To build a campaign, users will choose an existing template. The template will have a ...
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1answer
303 views

Processing csv files (alternative to business logic in DB)

We are working on a fulfillment system for an online book store. Everyday we receive tens of CSV files (about 90 files) with data about purchased orders. Example: OrderId | BookTitle | ...
3
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1answer
203 views

Architectural problem for Activity communication in an Android app

I maintain an open source Flickr app Glimmr for Android. There is currently an architectural issue around pagination that I've been trying to solve for quite a while, and would appreciate ideas. ...
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2answers
552 views

How to build configurable forms?

I'm working on two separate projects now that are essentially just CMSs -- a bunch of forms for recording various bits of information. Each project is built to serve many clients, and each client ...
38
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7answers
4k views

How do I stop designing and start architecting this project as suggested by my lead? [closed]

I'm a junior developer (~3 years' exp.) and at my job we're in the process of architecting a new system. My lead developer will be the principal architect, however he's challenged me to try ...
5
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2answers
4k views

Decoupling Server and Client using REST API

I was thinking about how I can decouple a web-application completely into a server-side and a client-side component. I want to decouple the app to the extent that I can host both components on ...
4
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1answer
216 views

Which relationship is more natural?

Have a quick question on how to best structure something for my Java project: I'm a user. I can work at one or more places. At those workplaces, I have one or more roles. For each of these roles, I ...
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1answer
130 views

Good strategy to implement a listener processing tasks provided by the database

Let's assume this conceptual scenario: The database is constantly populated with "a ton" of tasks named PleaseSendAnEmail. A scheduler/listener in background is aimed to handle those tasks. Of ...
4
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2answers
219 views

Is it an acceptable practice to Get a property, that involve parsing binary, that might throw an exception?

I have a property that is loaded lazily, any time after the ctor is called. It is possible that the binary that my property relies on is invalid. If invalid I might have to throw an exception. ...
3
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1answer
76 views

How do I respond to incoming network messages in a way that achieves loose coupling?

I'm working on a client-server sort of protocol right now in Ruby. I've hit a snag where I'm not entirely sure how to proceed. Currently, I have a class, Remote that signifies a remote connection (for ...
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1answer
397 views

Should I really need to implement event sourcing is this case?

An example of use case when event sourcing is applicable here whose excerpt is: Say, something went wrong in your app and as a result, a user gets blocked for abuse but that user claims to not ...
4
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1answer
184 views

Organisation by business function vs technical function

I am designing a large application (a static code analyser) and I have a choice in how to organise the code into modules: One approach is by what I'd call by technical function. This is where you ...
14
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1answer
8k views

Why database as queue so bad? [closed]

I've just read this article, and I'm confused. Let's imagine 1 webapp and 1 distinct application acting as "worker", both sharing the same database. Oh, I said "sharing"..but what does the article ...
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3answers
168 views

SQL string field lengths in a db having about 6 different types of addresses, with about 20 markets and environments

I have been advocating lately that all string fields should be ntext / nvarchar(max) - we're using MS SQL Server. The objections seem to be either "it's not a good idea" (without any reason) or "that ...
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3answers
1k views

“Property Container” design-pattern in-depth definition

Could anybody, please, explain what is a Property Container or at least where can I get information about that pattern on the Internet? I've found that it exists as one of the Fundamental patterns in ...
3
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2answers
262 views

Is it a good idea to develop website that only has little access to DB? CRUD will be done by calling API provided by separate internal backend system

I'm going to start developing an application in near future. This application consists of : Back-end system. This system provides API to be used by client. This system connects to data store and ...
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1answer
348 views

How to develop custom functions on top of Ejabberd? [closed]

I'm developing a real time chat app. After searching around for a while, I found Ejabberd and Erlang is a good option. The question is the Ejabberd is not providing all the functions I need. I need ...
17
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4answers
2k views

How does persistence fit into a purely functional language?

How does the pattern of using command handlers to deal with persistence fit into a purely functional language, where we want to make IO-related code as thin as possible? When implementing ...
0
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1answer
1k views

How is MVC different from Layered

Based on this book , refering to pages 156 to 159 , it talks about the two different types of software architecture model : MVC & Layered . There are distributed system architecture patterns such ...
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3answers
381 views

Software architecture which allows for growth, real life situation [closed]

I know of Interfaces, Abstract classes that serve as Base class, I've been reading up on loose coupling, ... But I can't come up with a decent solution when a property of a class changes, and the new ...
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0answers
172 views

DRY on API specifcations?

When developing a new RESTful application, I generally: Define tests Define routes [ e.g.: RESTful CRUD; namespaced on /api/users ] Define models [ e.g.: "Users" ] Define forms [ e.g.: in ...
4
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3answers
423 views

My architecture has a problem with views that required information from different objects. How can I solve this?

I am building an architecture like this: These are my SW layers ______________ | | | Views | |______________| ______________ | | |Business Logic| |______________| ...
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1answer
77 views

How to organise intermodule integration in a modular project?

I'm currently writing my own PHP Framework (yes, another one) for studying purposes. I'll actually try to use it as my graduation dissertation. After two failed attempts, I've finally found a way to ...
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1answer
406 views

PHP OOP - Getters / setters vs. database storing

Problem I am trying to optimize the architecture of my web-application developed in PHP using the Symfony framework. I have an object "pool" that contains "swimmers". I need to display the number of ...