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  • How to train yourself to avoid writing “clever” code?

    - by Dan Abramov
    Do you know that feeling when you just need to show off that new trick with Expressions or generalize three different procedures? This does not have to be on Architecture Astronaut scale and in fact may be helpful but I can't help but notice someone else would implement the same class or package in a more clear, straightforward (and sometimes boring) manner. I noticed I often design programs by oversolving the problem, sometimes deliberately and sometimes out of boredom. In either case, I usually honestly believe my solution is crystal clear and elegant, until I see evidence to the contrary but it's usually too late. There is also a part of me that prefers undocumented assumptions to code duplication, and cleverness to simplicity. What can I do to resist the urge to write “cleverish” code and when should the bell ring that I am Doing It Wrong? The problem is getting even more pushing as I'm now working with a team of experienced developers, and sometimes my attempts at writing smart code seem foolish even to myself after time dispels the illusion of elegance.

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  • AIA und die "IT Strategies from Oracle"

    - by Hans Viehmann
    Die Oracle Application Integration Architecture lässt sich gut nutzen, um eine SOA Initiative zügig zu starten. Naturgemäß berücksichtigt sie aber nicht alle Aspekte einer IT Strategie. Zu diesem Thema gibt es nun seit einigen Wochen eine umfassende Bibliothek von Handbüchern ("Practitioner's Guides") und Referenz-Architekturen, in denen die Erfahrung aus zahlreichen Projekten zusammengefasst ist.Hier ist beispielsweise ein IT Governance Framework beschrieben, das auch die wesentlichen Aspekte der SOA GovernanceSOA Portfolio GovernanceService Lifecycle GovernanceSOA Solution Lifecycle GovernanceSOA Vitality GovernanceSOA Organization Governancenäher beschreibt.In den Handbüchern sind zahlreiche wertvolle Hinweise und best practices enthalten; ich denke, es lohnt sich, einen Blick hinein zu werfen.Die gesamte Bibliothek findet sich unter http://www.oracle.com/goto/itstrategies; eine Übersicht über die verschiedenen Aspekte ist in dem Bild unten zusammengefasst.View image

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  • Software Developer Interview Question - Fair or Unfair

    - by user607018
    I just phone interviewed with a company for a graduate software developer position and was asked the following questions. I should add that the company concerned are not a database vendor. How does a query optimiser work? If a database was performing badly how would you use the performance logs to find out the problem. I have asked whether they ask such questions of all candidate software developers (graduate or experienced) in a first phone interview. They replied that they like to test their candidates knowledge of database development. I want to write to the company to say that these questions are unreasonable to ask at a software developer interview and to request that my interview be done over. I would like to check the reasonableness of the following assumptions a) Those questions cannot be fairly classified as database development questions. b) I think the questions are appropriate for a DBA interview but wholly unreasonable for a software developer interview (experienced or not). c) The first question is only relevant to a database vendor. d) The second question is not fair because software developers typically don't deal with database performance logs as that is the job of the DBA. Perhaps some of you will be kind enough to comment on my assumptions or may have any other suggestions, before I write to the company.

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  • Can a loosely typed language be considered true object oriented?

    - by user61852
    Can a loosely typed programming language like PHP be really considered object oriented? I mean, the methods don't have returning types and method parameters has no declared type either. Doesn't class design require methods to have a return type? Don't methods signatures have specifically-typed parameters? How can OOP techniques help you code in PHP if you always have to check the types of parameters received because the language doesn't enforce types? Please, if I'm wrong, explain it to me. When you design things using UML, then code classes in PHP with no return-typed methods and no-type parameters... Is the code really compliant with the UML design? You spend time designing the architecture of your software, then the compiler doesn't force the programmer to follow your design while coding, letting he/she assign any object variable to any other variable with no "type-mismatch" warning.

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  • Developing an analytics's system processing large amounts of data - where to start

    - by Ryan
    Imagine you're writing some sort of Web Analytics system - you're recording raw page hits along with some extra things like tagging cookies etc and then producing stats such as Which pages got most traffic over a time period Which referers sent most traffic Goals completed (goal being a view of a particular page) And more advanced things like which referers sent the most number of vistors who later hit a goal. The naieve way of approaching this would be to throw it in a relational database and run queries over it - but that won't scale. You could pre-calculate everything (have a queue of incoming 'hits' and use to update report tables) - but what if you later change a goal - how could you efficiently re-calculate just the data that would be effected. Obviously this has been done before ;) so any tips on where to start, methods & examples, architecture, technologies etc.

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  • CIO Magazine's State of the CIO and its Impact on Your EA

    - by david.olivencia(at)oracle.com
    CIO Magazine today released its State of the CIO report.  As most Enterpise Architects report to (or report very close to) the CIO, the report provides interesting insights as to where most CIOs minds and priorities are.  The information will allow Enterprise Architects  to better align plans, approaches, models, and stratagies. The report's summary can be found here:  http://assets.cio.com/documents/cache/pdfs/2011/dec15_gatefold.pdf   Specifically the article highlights: * How IT Makes A Difference * Critical Leadership Skills * Business Focused CIOs * Areas of Increasing Responsibility * Plans for 2015   Enterprise Architects what insights from this report will alter they way you successfully lead in 2011?   David Olivencia | Solution Director, Enterprise Architecture & Exa ServicesOracle Consulting Latin America and Caribbean

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  • SQLAuthority News – Mark the Date: October 16, 2013 – Introducing NuoDB Blackbirds: THE Distributed Database

    - by Pinal Dave
    I am very excited to announce first on this blog about the release of NuoDB Blackbirds (NuoDB Release 2.0). NuoDB is my favorite application to work with data now a days. They are increasingly gaining market share as well as brining out new features with their every new release. I was very excited when I learned that NuoDB is releasing their flagship release of 2.0 on October 16, 2013. Interesting enough I will be in USA while this release happens and I will be watching it live during my day time. Even though if I had to stay up the entire night to just watch this release, I would do it. Here is the details of the announcements: Introducing NuoDB Blackbirds: THE Distributed Database Date: October 16, 2013 Time: 1:00 PM EDT Location: Online Registration Link What is the best DBMS architecture to handle today’s and tomorrow’s evolving needs? The days of shared disk are over. The times are “a-changin” and IT infrastructure has to change with them. Join NuoDB live for the introduction of our latest major product release, NuoDB Blackbirds, and take a look at why the NuoDB distributed database architecture is the only answer for customers like Fathom Voice, a leading provider of Voice Over IP (VoIP). NuoDB CEO, Barry Morris, welcomes Cameron Weeks, CEO of Fathom Voice to discuss how his company is using DBMS to break away from the pack and become the hottest player in VoIP. The webcast will include demonstrations of a single, logical database running in multiple geographies and a live Q&A. If due to any reason, you cannot watch it live, do not worry at all, just register at this Registration Link, as after the event you will get the link to watch the event on-demand. You can watch the launch event at any time if you have registered for the launch. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL Tagged: NuoDB

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  • Databases and the CI server

    - by mlk
    I have a CI server (Hudson) which merrily builds, runs unit tests and deploys to the development environment but I'd now like to get it running the integration tests. The integration tests will hit a database and that database will be consistently being changed to contain the data relevant to the test in question. This however leads to a problem - how do I make sure the database is not being splatted with data for one test and then that data being override by a second project before the first set of tests complete? I am current using the "hope" method, which is not working out too badly at the moment, but mostly due to the fact that we only have a small number of integration tests set up on CI. As I see it I have the following options: Test-local (in memory) databases I'm not sure if any in-memory databases handle all the scaryness of Oracles triggers and packages etc, and anything less I don't feel would be a worth while test. CI Executor-local databasesA fair amount of work would be needed to set this up and keep 'em up to date, but defiantly an option (most of the work is already done to keep the current CI database up-to-date). Single "integration test" executorLikely the easiest to implement, but would mean the integration tests could fall quite far behind. Locking the database (or set of tables) I'm sure I've missed some ways (please add them). How do you run database-based integration tests on the CI server? What issues have you had and what method do you recommend? (Note: While I use Hudson, I'm happy to accept answers for any CI server, the ideas I'm sure will be portable, even if the details are not). Cheers,      Mlk

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  • How should modules access data outside their scope?

    - by Joe
    I run into this same problem quite often. First, I create a namespace and then add modules to this namespace. Then issue I always run into is how best to initialize the application? Naturally, each module has its own startup procedure so should this data(not code in some cases, just a list of items to run) stay with the module? Or should there be a startup procedure in the global namespace which has the startup data for ALL the modules. Which is the more robust way of organizing this situation? Should some things be made centralized or should there be strict adherence to modules encapsulating everything about themselves? Though this is a general architecture questions, Javascript centric answers would be really appreciated!

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  • Looking for literature about graphics pipeline optimization

    - by zacharmarz
    I am looking for some books, articles or tutorials about graphics architecture and graphics pipeline optimizations. It shouldn't be too old (2008 or newer) - the newer, the better. I have found something in [Optimising the Graphics Pipeline, NVIDIA, Koji Ashida] - too old, [Real-time rendering, Akenine Moller], [OpenGL Bindless Extensions, NVIDIA, Jeff Bolz], [Efficient multifragment effects on graphics processing units, Louis Frederic Bavoil] and some internet discussions. But there is not too much information and I want to read more. It should contain something about application, driver, memory and shader units communication and data transfers. About vertices and attributes. Also pre and post T&L cache (if they still exist in nowadays architectures) etc. I don't need anything about textures, frame buffers and rasterization. It can also be about OpenGL (not about DirecX) and optimizing extensions (not old extensions like VBOs, but newer like vertex_buffer_unified_memory).

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  • What can programmers learn from the construction industry?

    - by Renesis
    When talking with colleagues about software design and development principles, I've noticed one of the most common sources for analogies is the construction industry. We build software and we consider the design and structure to be the architecture. One of the best ways to learn (or teach) are through analyzing analogies - what other analogies can be drawn from construction? (whether already in common use in software or not). Please provide a description, or your personal experience, regarding how the programming concept is similar to the construction concept. [Credit to Programming concepts taken from the arts and humanities for the idea]

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  • Application layer vs domain layer?

    - by Louis Rhys
    I am reading Domain-Driven Design by Evans and I am at the part discussing the layered architecture. I just realized that application and domain layers are different and should be separate. In the project I am working on, they are kind of blended and I can't tell the difference until I read the book (and I can't say it's very clear to me now), really. My questions, since both of them concerns the logic of the application and are supposed to be clean of technical and presentation aspects, what are the advantages of drawing a boundary these two?

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  • Convenient practice for where to place images?

    - by Baumr
    A lot of developers place all image files inside a central directory, for example: /i/img/ /images/ /img/ Isn't it better (e.g. content architecture, on-page SEO, code maintainability, filename maintainability, etc.) to place them inside the relevant directories in which they are used? For example: example.com/logo.jpg example.com/about/photo-of-me.jpg example.com/contact/map.png example.com/products/category1-square.png example.com/products/category2-square.png example.com/products/category1/product1-thumb.jpg example.com/products/category1/product2-thumb.jpg example.com/products/category1/product1/product1-large.jpg example.com/products/category1/product1/product2-large.jpg example.com/products/category1/product1/product3-large.jpg What is the best practice here regarding all possible considerations (for static non-CMS websites)? N.B. The names product1-large and product1-thumb are just examples in this context to illustrate what kind of images they are. It is advised to use descriptive filenames for SEO benefit.

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  • HTML Canvas: Should my app x, y values be global?

    - by Joe
    I have a large file of functions. Each of these functions is responsible for drawing a particular part of the application. My app has x and y parameters that I use in the setup function to move the whole app around in order to try different placements. So, naturally, I need to use these x and y values to anchor each function's component rendering so that everything moves in unison if the global x,y values ever change. My question is, is it bad practice/architecture to have these x,y values in the global namespace and having the each function directly access them like so? function renderFace() { var x = App.x; var y = App.y; // drawing here } is there a better way i'm missing?

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  • Understanding Data Binding for Windows Phone 7

    - by nikhil
    I want to develop a simple app for the Windows Phone 7 platform. It's basically a vocabulary based game that involves the user moving word tiles from one area to another to score points. I want to know what is the best way of tying the UI to the game's backend? I saw the Windows Phone 7 jumpstart videos, there they touch up on Data Binding but don't really go into any depth. I'm a newbie and don't have any experience with designing the architecture for a phone app, It'd be great if someone could explain what steps I should be taking or guide me to a resource from where I could learn more.

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  • Material, Pass, Technique and shaders

    - by Papi75
    I'm trying to make a clean and advanced Material class for the rendering of my game, here is my architecture: class Material { void sendToShader() { program->sendUniform( nameInShader, valueInMaterialOrOther ); } private: Blend blendmode; ///< Alpha, Add, Multiply, … Color ambient; Color diffuse; Color specular; DrawingMode drawingMode; // Line Triangles, … Program* program; std::map<string, TexturePacket> textures; // List of textures with TexturePacket = { Texture*, vec2 offset, vec2 scale} }; How can I handle the link between the Shader and the Material? (sendToShader method) If the user want to send additionals informations to the shader (like time elapsed), how can I allow that? (User can't edit Material class) Thanks!

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  • asp.net website development component / APIs

    - by Haseeb Asif
    I have been assigned a new website project to work on in my organization where my role demand to finalize all the tools/technologies/controls/api etc. That website will something like online store, where every user has his online store as subdomain e.g. user1.myprojectdomain.com I have been researching a number of things to use and need your suggestions in following levels ASP.NET web forms vs Asp.net MVC: Prefering asp.net webforms due to following reason with N Tier Architecture Rapid application Development large set of Toolbox/controls And mainly due to our team skill set Errorlogging Elmah seems to be a nice library Forums Forums Yetanotherforums On line Live Chat still looking for something (Working on SignalR) Signups with Social Media Engage by Janrain And I need help that how can Manage sub domains. Do we create a Virtual Directory/application for every user in the IIS on runtime or we can do some thing else

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  • How essential is it to make a service layer?

    - by BornToCode
    I started building an app in 3 layers (DAL, BL, UI) [it mainly handles CRM, some sales reports and inventory]. A colleague told me that I must move to service layer pattern, that developers came to service pattern from their experience and it is the better approach to design most applications. He said it would be much easier to maintain the application in the future that way. Personally, I get the feeling that it's just making things more complex and I couldn't see much of a benefit from it that would justify that. This app does have an additional small partial ui that uses some (but only few) of the desktop application functions so I did find myself duplicating some code (but not much). Just because of some code duplication I wouldn't convert it to be service oriented, but he said I should use it anyway because in general it's a very good architecture, why programmers are so in love with services?? I tried to google on it but I'm still confused and can't decide what to do.

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  • What could be a reason for cross-platform server applications developer to make his app work in multiple processes?

    - by Kabumbus
    So we consider a server app development - heavily loaded with messing with big data streams.An app will be running on one powerful server. a server app shall be developed in form of crossplatform application - so to work on Windows, Mac OS X and Linux. So same code many platforms for standing alone server architecture. We wonder what benefits does distributing applications not only over threads but over processes as wall would bring to programmers and to server end users and why? Some people sad to me that even having 48 cores, 4 process threads would be shared via OS throe all cores... is it true BTW?

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  • Retrieving snapshots of game statistics

    - by SatheeshJM
    What is a good architecture for storing game statistics, so that I can retrieve snapshots of it at various moments? Say I have a game, and the user's statistics initially are: { hours_played = 0, games_played = 0, no_of_times_killed = 0, } When the user purchases something for the first time from within the game, the stats are { hours_played = 10, games_played = 2, no_of_times_killed = 5, } And when he purchases something for the second time, the stats are { hours_played = 20, games_played = 4, no_of_times_killed = 10, } Let me name the events as "purchase1" and "purchase2" How do I model my statistics, so that at any point in the future, I will be able to retrieve the snapshot of the statistics at the time when "purchase1" was fired. Similarly for "purchase2" and any other event I will add. Hope that made sense..

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  • How to reduce tight coupling between two data sources

    - by fstuijt
    I'm having some trouble finding a proper solution to the following architecture problem. In our setting (sketched below) we have 2 data sources, where data source A is the primary source for items of type Foo. A secondary data source exists which can be used to retrieve additional information on a Foo; however this information does not always exist. Furthermore, data source A can be used to retrieve items of type Bar. However, each Bar refers to a Foo. The difficulty here is that each Bar should refer to a Foo which, if available, also contains the information as augmented by data source B. My question is: how to remove the tight coupling between data source A and B?

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  • Any learning/studying material for C/C++ that use game programming as learning context out there?

    - by mac
    As most of game programming is done - I read on this very site - in C/C++ I was wondering if there is any learning/studying material for C/C++ that would target specifically game programming. I am not looking for material about "developing games" or "software architecture for games", but rather for material that uses "game programming" as the CONTEXT for introducing and illustrating C/C++ features, idioms, programming techniques, etc... With a simile: think to the GOF book on design patterns. There, they used "developing a text-editor" as a context for introducing design patterns, but the book is most definitively not a book about "developing text-editors". Thanks in advance for your time and advice! PS: My background: I am a programmer with a solid experience in OO scripting languages and only some experience in C and Assembler (on AVR microcontrollers), so I am thinking to mid-to-advanced level material, rather than tutorials for beginners, although it might be interesting to take a look to the latter ones if nothing else is available.

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  • How to build a highload multithreaded web application in MVC3 or MVC4?

    - by IamStalker
    I need to build a highload multithreaded web application in ASP.NET MVC3 or MVC4, My question is how to design an architecture of an application? How to choose a DomainModel , use or not to use an ORM in this application? How to build a system that would be safe and if some error will happen, how to raise up a second level safety mechanism? Any examples with sources would be greatly appreciated. PS: don't kill the question if it's should be in any other SO places. Just tell me and i will place it there. Thank you very much in advance.

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  • One codebase - lots of hosted services (similar to a basecamp style service) - planning structure

    - by RickM
    We have built a service (PHP Based) for a client, and are now looking to offer it to other clients as a hosted service. For this example, think of it like a hosted forum service, where a client signs up on our site, and is given a subdomain or can use their own domain, and the code picks up the domain, checks it against a 'master' users table, and then loads the content as needed. I'm trying to work out the best way of handling multiple clients. At the moment I can only think of two options that would work: Option 1 - Have 1 set of database tables, but on each table have a column called 'siteid' - this would mean every query has to check the siteid. This would effectively work with just 1 codebase, and 1 database. Option 2 - Have 1 'master' database with all the core stuff such as the client details and their domain. Then when the systen checks the domain, it pulls the clients database details (username/password/dbname) from a table, and loads a second database. The issue here is security of the mysql server details, however it does have the benefit that they are running their own database instead of sharing one. Which option would I be better taking here, and why? Ideally I want it to be fairly easy to convert the 'standalone' script to the 'multi-domain' script as we're on a tight deadline.

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  • HTTP events? Is there a standard / precedent for this?

    - by user619818
    Our architecture is HTTP servers (custom written) which whereby custom clients send a HTTP request for some information and information is returned just as HTTP works. But we need a special custom 'extension' which is a request which is a subscription for receiving asynchronous 'events' on a resource. For example the client sends an http request subscribing for events on some entity. As the 'entity' generates events they are passed to the http server and the http server must then lookup subscriptions for that entity and send the event message to all subscribed clients. Hope that makes sense. So my questions are: Has this been done before / or is there a standard I should be looking at? If no standard, any suggestions on how to implement? How does a http server send an unsolicited 'message' to a client?

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