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  • Web hosting a setup where both Windows and Linux are required

    - by lk
    I have a system where a website needs to be hosted on a Linux machine while a backend application that the site talks to needs to reside on Windows. Is there any "common practice" for such hosting? Note - both of the systems are mine so there is the dilemma of whether to have the machines physically located together to avoid delay for calls over the net.

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  • Web Matrix released

    - by TATWORTH
    Microsoft have now released Web Matrix (and ASP.NET MVC3 if you so inclined!) One signifcant utility is IIS Express which will replace Cassini It is worth noting that SP1 for VS2010 should be out in Q1. Links: http://www.hanselman.com/blog/ASPNETMVC3WebMatrixNuGetIISExpressAndOrchardReleasedTheMicrosoftJanuaryWebReleaseInContext.aspx http://www.hanselman.com/blog/LinkRollupNewDocumentationAndTutorialsFromWebPlatformAndTools.aspx http://arstechnica.com/microsoft/news/2011/01/microsoft-releases-free-webmatrix-web-development-tool.ars I am impressed by the copious tutorials on MVC, which I include below: Intro to ASP.NET MVC 3 onboarding series. Scott Hanselman and Rick Anderson collaboration and Mike Pope (Editor) Both C# and VB versions: Intro to ASP.NET MVC 3 Adding a Controller Adding a View Entity Framework Code-First Development Accessing your Model's Data from a Controller Adding a Create Method and Create View Adding Validation to the Model Adding a New Field to the Movie Model and Table Implementing Edit, Details and Delete Source code for this series MVC 3 Updated and new tutorials/ API Reference on MSDN Rick Anderson (Lead Programming Writer), Keith Newman and Mike Pope (Editor) ASP.NET MVC 3 Content Map ASP.NET MVC Overview MVC Framework and Application Structure Understanding MVC Application Execution Compatibility of ASP.NET Web Forms and MVC Walkthrough: Creating a Basic ASP.NET MVC Project Walkthrough: Using Forms Authentication in ASP.NET MVC Controllers and Action Methods in ASP.NET MVC Applications Using an Asynchronous Controller in ASP.NET MVC Views and UI Rendering in ASP.NET MVC Applications Rendering a Form Using HTML Helpers Passing Data in an ASP.NET MVC Application Walkthrough: Using Templated Helpers to Display Data in ASP.NET MVC Creating an ASP.NET MVC View by Calling Multiple Actions Models and Validation in ASP.NET MVC How to: Validate Model Data Using DataAnnotations Attributes Walkthrough: Using MVC View Templates How to: Implement Remote Validation in ASP.NET MVC Walkthrough: Adding AJAX Scripting Walkthrough: Organizing an Application using Areas Filtering in ASP.NET MVC Creating Custom Action Filters How to: Create a Custom Action Filter Unit Testing in ASP.NET MVC Applications Walkthrough: Using TDD with ASP.NET MVC How to: Add a Custom ASP.NET MVC Test Framework in Visual Studio ASP.NET MVC 3 Reference System.Web.Mvc System.Web.Mvc.Ajax System.Web.Mvc.Async System.Web.Mvc.Html System.Web.Mvc.Razor

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  • Anunciando: Grandes Melhorias para Web Sites da Windows Azure

    - by Leniel Macaferi
    Estou animado para anunciar algumas grandes melhorias para os Web Sites da Windows Azure que introduzimos no início deste verão.  As melhorias de hoje incluem: uma nova opção de hospedagem adaptável compartilhada de baixo custo, suporte a domínios personalizados para websites hospedados em modo compartilhado ou em modo reservado usando registros CNAME e A-Records (o último permitindo naked domains), suporte para deployment contínuo usando tanto CodePlex e GitHub, e a extensibilidade FastCGI. Todas essas melhorias estão agora online em produção e disponíveis para serem usadas imediatamente. Nova Camada Escalonável "Compartilhada" A Windows Azure permite que você implante e hospede até 10 websites em um ambiente gratuito e compartilhado com múltiplas aplicações. Você pode começar a desenvolver e testar websites sem nenhum custo usando este modo compartilhado (gratuito). O modo compartilhado suporta a capacidade de executar sites que servem até 165MB/dia de conteúdo (5GB/mês). Todas as capacidades que introduzimos em Junho com esta camada gratuita permanecem inalteradas com a atualização de hoje. Começando com o lançamento de hoje, você pode agora aumentar elasticamente seu website para além desta capacidade usando uma nova opção "shared" (compartilhada) de baixo custo (a qual estamos apresentando hoje), bem como pode usar a opção "reserved instance" (instância reservada) - a qual suportamos desde Junho. Aumentar a capacidade de qualquer um desses modos é fácil. Basta clicar na aba "scale" (aumentar a capacidade) do seu website dentro do Portal da Windows Azure, escolher a opção de modo de hospedagem que você deseja usar com ele, e clicar no botão "Salvar". Mudanças levam apenas alguns segundos para serem aplicadas e não requerem nenhum código para serem alteradas e também não requerem que a aplicação seja reimplantada/reinstalada: A seguir estão mais alguns detalhes sobre a nova opção "shared" (compartilhada), bem como a opção existente "reserved" (reservada): Modo Compartilhado Com o lançamento de hoje, estamos introduzindo um novo modo de hospedagem de baixo custo "compartilhado" para Web Sites da Windows Azure. Um website em execução no modo compartilhado é implantado/instalado em um ambiente de hospedagem compartilhado com várias outras aplicações. Ao contrário da opção de modo free (gratuito), um web-site no modo compartilhado não tem quotas/limite máximo para a quantidade de largura de banda que o mesmo pode servir. Os primeiros 5 GB/mês de banda que você servir com uma website compartilhado é grátis, e então você passará a pagar a taxa padrão "pay as you go" (pague pelo que utilizar) da largura de banda de saída da Windows Azure quando a banda de saída ultrapassar os 5 GB. Um website em execução no modo compartilhado agora também suporta a capacidade de mapear múltiplos nomes de domínio DNS personalizados, usando ambos CNAMEs e A-records para tanto. O novo suporte A-record que estamos introduzindo com o lançamento de hoje oferece a possibilidade para você suportar "naked domains" (domínios nús - sem o www) com seus web-sites (por exemplo, http://microsoft.com além de http://www.microsoft.com). Nós também, no futuro, permitiremos SSL baseada em SNI como um recurso nativo nos websites que rodam em modo compartilhado (esta funcionalidade não é suportada com o lançamento de hoje - mas chagará mais tarde ainda este ano, para ambos as opções de hospedagem - compartilhada e reservada). Você paga por um website no modo compartilhado utilizando o modelo padrão "pay as you go" que suportamos com outros recursos da Windows Azure (ou seja, sem custos iniciais, e você só paga pelas horas nas quais o recurso estiver ativo). Um web-site em execução no modo compartilhado custa apenas 1,3 centavos/hora durante este período de preview (isso dá uma média de $ 9.36/mês ou R$ 19,00/mês - dólar a R$ 2,03 em 17-Setembro-2012) Modo Reservado Além de executar sites em modo compartilhado, também suportamos a execução dos mesmos dentro de uma instância reservada. Quando rodando em modo de instância reservada, seus sites terão a garantia de serem executados de maneira isolada dentro de sua própria VM (virtual machine - máquina virtual) Pequena, Média ou Grande (o que significa que, nenhum outro cliente da Windows azure terá suas aplicações sendo executadas dentro de sua VM. Somente as suas aplicações). Você pode executar qualquer número de websites dentro de uma máquina virtual, e não existem quotas para limites de CPU ou memória. Você pode executar seus sites usando uma única VM de instância reservada, ou pode aumentar a capacidade tendo várias instâncias (por exemplo, 2 VMs de médio porte, etc.). Dimensionar para cima ou para baixo é fácil - basta selecionar a VM da instância "reservada" dentro da aba "scale" no Portal da Windows Azure, escolher o tamanho da VM que você quer, o número de instâncias que você deseja executar e clicar em salvar. As alterações têm efeito em segundos: Ao contrário do modo compartilhado, não há custo por site quando se roda no modo reservado. Em vez disso, você só paga pelas instâncias de VMs reservadas que você usar - e você pode executar qualquer número de websites que você quiser dentro delas, sem custo adicional (por exemplo, você pode executar um único site dentro de uma instância de VM reservada ou 100 websites dentro dela com o mesmo custo). VMs de instâncias reservadas têm um custo inicial de $ 8 cents/hora ou R$ 16 centavos/hora para uma pequena VM reservada. Dimensionamento Elástico para Cima/para Baixo Os Web Sites da Windows Azure permitem que você dimensione para cima ou para baixo a sua capacidade dentro de segundos. Isso permite que você implante um site usando a opção de modo compartilhado, para começar, e em seguida, dinamicamente aumente a capacidade usando a opção de modo reservado somente quando você precisar - sem que você tenha que alterar qualquer código ou reimplantar sua aplicação. Se o tráfego do seu site diminuir, você pode diminuir o número de instâncias reservadas que você estiver usando, ou voltar para a camada de modo compartilhado - tudo em segundos e sem ter que mudar o código, reimplantar a aplicação ou ajustar os mapeamentos de DNS. Você também pode usar o "Dashboard" (Painel de Controle) dentro do Portal da Windows Azure para facilmente monitorar a carga do seu site em tempo real (ele mostra não apenas as solicitações/segundo e a largura de banda consumida, mas também estatísticas como a utilização de CPU e memória). Devido ao modelo de preços "pay as you go" da Windows Azure, você só paga a capacidade de computação que você usar em uma determinada hora. Assim, se o seu site está funcionando a maior parte do mês em modo compartilhado (a $ 1.3 cents/hora ou R$ 2,64 centavos/hora), mas há um final de semana em que ele fica muito popular e você decide aumentar sua capacidade colocando-o em modo reservado para que seja executado em sua própria VM dedicada (a $ 8 cents/hora ou R$ 16 centavos/hora), você só terá que pagar os centavos/hora adicionais para as horas em que o site estiver sendo executado no modo reservado. Você não precisa pagar nenhum custo inicial para habilitar isso, e uma vez que você retornar seu site para o modo compartilhado, você voltará a pagar $ 1.3 cents/hora ou R$ 2,64 centavos/hora). Isto faz com que essa opção seja super flexível e de baixo custo. Suporte Melhorado para Domínio Personalizado Web sites em execução no modo "compartilhado" ou no modo "reservado" suportam a habilidade de terem nomes personalizados (host names) associados a eles (por exemplo www.mysitename.com). Você pode associar múltiplos domínios personalizados para cada Web Site da Windows Azure. Com o lançamento de hoje estamos introduzindo suporte para registros A-Records (um recurso muito pedido pelos usuários). Com o suporte a A-Record, agora você pode associar domínios 'naked' ao seu Web Site da Windows Azure - ou seja, em vez de ter que usar www.mysitename.com você pode simplesmente usar mysitename.com (sem o prefixo www). Tendo em vista que você pode mapear vários domínios para um único site, você pode, opcionalmente, permitir ambos domínios (com www e a versão 'naked') para um site (e então usar uma regra de reescrita de URL/redirecionamento (em Inglês) para evitar problemas de SEO). Nós também melhoramos a interface do usuário para o gerenciamento de domínios personalizados dentro do Portal da Windows Azure como parte do lançamento de hoje. Clicando no botão "Manage Domains" (Gerenciar Domínios) na bandeja na parte inferior do portal agora traz uma interface de usuário personalizada que torna fácil gerenciar/configurar os domínios: Como parte dessa atualização nós também tornamos significativamente mais suave/mais fácil validar a posse de domínios personalizados, e também tornamos mais fácil alternar entre sites/domínios existentes para Web Sites da Windows Azure, sem que o website fique fora do ar. Suporte a Deployment (Implantação) contínua com Git e CodePlex ou GitHub Um dos recursos mais populares que lançamos no início deste verão foi o suporte para a publicação de sites diretamente para a Windows Azure usando sistemas de controle de código como TFS e Git. Esse recurso fornece uma maneira muito poderosa para gerenciar as implantações/instalações da aplicação usando controle de código. É realmente fácil ativar este recurso através da página do dashboard de um web site: A opção TFS que lançamos no início deste verão oferece uma solução de implantação contínua muito rica que permite automatizar os builds e a execução de testes unitários a cada vez que você atualizar o repositório do seu website, e em seguida, se os testes forem bem sucedidos, a aplicação é automaticamente publicada/implantada na Windows Azure. Com o lançamento de hoje, estamos expandindo nosso suporte Git para também permitir cenários de implantação contínua integrando esse suporte com projetos hospedados no CodePlex e no GitHub. Este suporte está habilitado para todos os web-sites (incluindo os que usam o modo "free" (gratuito)). A partir de hoje, quando você escolher o link "Set up Git publishing" (Configurar publicação Git) na página do dashboard de um website, você verá duas opções adicionais quando a publicação baseada em Git estiver habilitada para o web-site: Você pode clicar em qualquer um dos links "Deploy from my CodePlex project" (Implantar a partir do meu projeto no CodePlex) ou "Deploy from my GitHub project"  (Implantar a partir do meu projeto no GitHub) para seguir um simples passo a passo para configurar uma conexão entre o seu website e um repositório de código que você hospeda no CodePlex ou no GitHub. Uma vez que essa conexão é estabelecida, o CodePlex ou o GitHub automaticamente notificará a Windows Azure a cada vez que um checkin ocorrer. Isso fará com que a Windows Azure faça o download do código e compile/implante a nova versão da sua aplicação automaticamente.  Os dois vídeos a seguir (em Inglês) mostram quão fácil é permitir esse fluxo de trabalho ao implantar uma app inicial e logo em seguida fazer uma alteração na mesma: Habilitando Implantação Contínua com os Websites da Windows Azure e CodePlex (2 minutos) Habilitando Implantação Contínua com os Websites da Windows Azure e GitHub (2 minutos) Esta abordagem permite um fluxo de trabalho de implantação contínua realmente limpo, e torna muito mais fácil suportar um ambiente de desenvolvimento em equipe usando Git: Nota: o lançamento de hoje suporta estabelecer conexões com repositórios públicos do GitHub/CodePlex. Suporte para repositórios privados será habitado em poucas semanas. Suporte para Múltiplos Branches (Ramos de Desenvolvimento) Anteriormente, nós somente suportávamos implantar o código que estava localizado no branch 'master' do repositório Git. Muitas vezes, porém, os desenvolvedores querem implantar a partir de branches alternativos (por exemplo, um branch de teste ou um branch com uma versão futura da aplicação). Este é agora um cenário suportado - tanto com projetos locais baseados no git, bem como com projetos ligados ao CodePlex ou GitHub. Isto permite uma variedade de cenários úteis. Por exemplo, agora você pode ter dois web-sites - um em "produção" e um outro para "testes" - ambos ligados ao mesmo repositório no CodePlex ou no GitHub. Você pode configurar um dos websites de forma que ele sempre baixe o que estiver presente no branch master, e que o outro website sempre baixe o que estiver no branch de testes. Isto permite uma maneira muito limpa para habilitar o teste final de seu site antes que ele entre em produção. Este vídeo de 1 minuto (em Inglês) demonstra como configurar qual branch usar com um web-site. Resumo Os recursos mostrados acima estão agora ao vivo em produção e disponíveis para uso imediato. Se você ainda não tem uma conta da Windows Azure, você pode inscrever-se em um teste gratuito para começar a usar estes recursos hoje mesmo. Visite o O Centro de Desenvolvedores da Windows Azure (em Inglês) para saber mais sobre como criar aplicações para serem usadas na nuvem. Nós teremos ainda mais novos recursos e melhorias chegando nas próximas semanas - incluindo suporte para os recentes lançamentos do Windows Server 2012 e .NET 4.5 (habilitaremos novas imagens de web e work roles com o Windows Server 2012 e NET 4.5 no próximo mês). Fique de olho no meu blog para detalhes assim que esses novos recursos ficarem disponíveis. Espero que ajude, - Scott P.S. Além do blog, eu também estou utilizando o Twitter para atualizações rápidas e para compartilhar links. Siga-me em: twitter.com/ScottGu Texto traduzido do post original por Leniel Macaferi.

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  • Migrate ASP.Net web site from IIS6 to IIS7

    - by David.Chu.ca
    I have to migrate an ASP.Net web site from IIS6 to IIS7. I tried to copy the all files for a web site from IIS6 (c:\inetpub\wwwroot\MySite) to another box with Windows Server 2008 R2 where IIS7 is the default web server. However, the simply copy seems not working. Should I rebuild the web site for IIS7 or should I make changes on the new box with IIS7 such as web.config? Thanks for the comments. Further investigation I found that http handers seems caused exception: <!--httpHandlers> <add path="Reserved.ReportViewerWebControl.axd" verb="*" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" validate="false"/> </httpHandlers--> After I comment out the above handler in web.config, the web page works fine. This is just my initial test. I am not sure if I should rebuild the web site from source codes or not. If so, do I need to specify for IIS7?

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  • Scope of Connection Object for a Website using Connection Pooling (Local or Instance)

    - by Danny
    For a web application with connection polling enabled, is it better to work with a locally scoped connection object or instance scoped connection object. I know there is probably not a big performance improvement between the two (because of the pooling) but would you say that one follows a better pattern than the other. Thanks ;) public class MyServlet extends HttpServlet { DataSource ds; public void init() throws ServletException { ds = (DataSource) getServletContext().getAttribute("DBCPool"); } protected void doGet(HttpServletRequest arg0, HttpServletResponse arg1) throws ServletException, IOException { SomeWork("SELECT * FROM A"); SomeWork("SELECT * FROM B"); } void SomeWork(String sql) { Connection conn = null; try { conn = ds.getConnection(); // execute some sql ..... } finally { if(conn != null) { conn.close(); // return to pool } } } } Or public class MyServlet extends HttpServlet { DataSource ds; Connection conn;* public void init() throws ServletException { ds = (DataSource) getServletContext().getAttribute("DBCPool"); } protected void doGet(HttpServletRequest arg0, HttpServletResponse arg1) throws ServletException, IOException { try { conn = ds.getConnection(); SomeWork("SELECT * FROM A"); SomeWork("SELECT * FROM B"); } finally { if(conn != null) { conn.close(); // return to pool } } } void SomeWork(String sql) { // execute some sql ..... } }

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  • Design and Print Your Own Christmas Cards in MS Word, Part 1

    - by Eric Z Goodnight
    Looking for a  little DIY fun this holiday season? Open up familiar tool MS Word and create simple, beautiful Christmas and Holiday cards, and impress your family with your crafting skills. This is the first part of a two part article. In this first section, we’ll tackle design in MS Word. In our second, we’ll cover supplies and proper printing methods to get a great look out of your dusty old inkjet. Latest Features How-To Geek ETC The How-To Geek Guide to Learning Photoshop, Part 8: Filters Get the Complete Android Guide eBook for Only 99 Cents [Update: Expired] Improve Digital Photography by Calibrating Your Monitor The How-To Geek Guide to Learning Photoshop, Part 7: Design and Typography How to Choose What to Back Up on Your Linux Home Server How To Harmonize Your Dual-Boot Setup for Windows and Ubuntu Hang in There Scrat! – Ice Age Wallpaper How Do You Know When You’ve Passed Geek and Headed to Nerd? On The Tip – A Lamborghini Theme for Chrome and Iron What if Wile E. Coyote and the Road Runner were Human? [Video] Peaceful Winter Cabin Wallpaper Store Tabs for Later Viewing in Opera with Tab Vault

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  • Android Design - Service vs Thread for Networking

    - by Nevyn
    I am writing an Android app, finally (yay me) and for this app I need persistant, but user closeable, network sockets (yes, more than one). I decided to try my hand at writing my own version of an IRC Client. My design issue however, is I'm not sure how to run the Socket connectivity itself. If I put the sockets at the Activity level, they keeps getting closed shortly after the Activity becomes non-visible (also a problem that needs solving...but I think i figured that one out)...but if I run a "connectivity service", I need to find out if I can have multiple instances of it running (the service, that is...one per server/socket). Either that or a I need a way to Thread the sockets themselves and have multiple threads running that I can still communicate with directly (ID system of some sort). Thus the question: Is it a 'better', or at least more "proper" design pattern, to put the Socket and networking in a service, and have the Activities consume said service...or should I tie the sockets directly to some Threaded Process owned by the UI Activity and not bother with the service implementation at all? I do know better than to put the networking directly on the UI thread, but that's as far as I've managed to get.

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  • Design pattern for animation sequence in LibGDX

    - by kevinyu
    What design pattern to use for sequence of animation that involve different actor in libGDX. For example I am making a game to choose a wolf from a group of sheeps. The first animation played when the game begin is the wolf enter the field that is filled with two sheeps.Then the wolf disguise as a sheep and goes to the center of the screen. Then the game will shuffle the sheeps. After it finished it will ask the player where is the wolf. The game wait for player input. After that the game will show animation to show the player whether their answer is right or wrong. I am currently using State design pattern. There are four states wolfEnterState,DisguiseState,ShuffleState,UserInputState, and answerAnimationState. I feel that my code is messy. I use addAction with action sequence and action completion(new Runnable()) a lot. I feel that the action sequence is getting long. Is there a better solution for this kind of problem

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  • Writing files in a sub folder of the web folder (apache security)

    - by Homunculus Reticulli
    I need to save session data for a dynamic web page script by writing to file. I have two questions: Are there any security preferences as to whether to save the data UNDER the web folder, or OUTSIDE the web folder? I attempted to write to the folder an (unsuprisingly), I had a 'file permission refused' type error. Should I set the folder ownership to the apache user (600, 640 or 644?) [[Edit]] core <- 'OUTSIDE' web folder (php script live here) data <- 'OUTSIDE' web folder (session data and other misc data resides here) web <- web root folder js <- any folder below is 'INSIDE' the web folder css html For example, in a php script (i.e. a dynamic PHP page), I can attempt to write to a file using something like fput('../data',data) yet (as I understand it) ../data should not be accessible - for security reasons. Could someone please provide a simple example that shows how to provide access to ../data/ in the example given above?. What are the actual SPECIFIC steps required? BTW, I am running on a LAMP stack.

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  • Partner Webcast – Implementing Web Services & SOA Security with Oracle Fusion Middleware - 20 September 2012

    - by Thanos
    Security was always one of the main pain points for the IT industry, and new security challenges has been introduced with the proliferation  of the service-oriented approach to building modern software. Oracle Fusion Middleware provides a wide variety of features that ease the building service-oriented solutions, but how these services can be secured?Should we implement the security features in each and every service or there’s a better way? During the webinar we are going to show how to implement non-intrusive declarative security for your SOA components by introducing the Oracle product portfolio in this area, such as Oracle Web Services Manager and Oracle IDM. Agenda: SOA & Web Services basics: quick refresher Building your SOA with Oracle Fusion Middleware: product review Common security risks in the Web Services world SOA & Web Services security standards Implementing Web Services Security with the Oracle products Web Services Security with Oracle – the big picture Declarative end point security with Oracle Web Services Manager Perimeter Security with Oracle Enterprise Gateway Utilizing the other Oracle IDM products for the advanced scenarios Q&A session Delivery Format This FREE online LIVE eSeminar will be delivered over the Web. Registrations received less than 24hours prior to start time may not receive confirmation to attend. Thursday, September 20, 2012 - 10:00 AM to 11:00 AM CET (GMT/UTC+1)Duration: 1 hour Register Now Send your questions and migration/upgrade requests [email protected] Visit regularly our ISV Migration Center blog or Follow us @oracleimc to learn more on Oracle Technologies, upcoming partner webcasts and events. All content is made available through our YouTube - SlideShare - Oracle Mix.

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  • OO Design, how to model Tonal Harmony?

    - by David
    I have started to write a program in C++ 11 that would analyse chords, scales, and harmony. The biggest problem I am having in my design phase, is that the note 'C' is a note, a type of chord (Cmaj, Cmin, C7, etc), and a type of key (the key of Cmajor, Cminor). The same issue arises with intervals (minor 3rd, major 3rd). I am using a base class, Token, that is the base class for all 'symbols' in the program. so for example: class Token { public: typedef shared_ptr<Token> pointer_type; Token() {} virtual ~Token() {} }; class Command : public Token { public: Command() {} pointer_type execute(); } class Note : public Token; class Triad : public Token; class MajorTriad : public Triad; // CMajorTriad, etc class Key : public Token; class MinorKey : public Key; // Natural Minor, Harmonic minor,etc class Scale : public Token; As you can see, to create all the derived classes (CMajorTriad, C, CMajorScale, CMajorKey, etc) would quickly become ridiculously complex including all the other notes, as well as enharmonics. multiple inheritance would not work, ie: class C : public Note, Triad, Key, Scale class C, cannot be all of these things at the same time. It is contextual, also polymorphing with this will not work (how to determine which super methods to perform? calling every super class constructors should not happen here) Are there any design ideas or suggestions that people have to offer? I have not been able to find anything on google in regards to modelling tonal harmony from an OO perspective. There are just far too many relationships between all the concepts here.

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  • difference between Casini [IIS express] and VS Development server or Expression web

    - by anirudha
    MVC3 project can be run within Expression web and Visual studio as opened like a website not a project. they work same even if you open blogengine.net project in VS they take a time when you have more theme but expression web debug them in a second. well because theme design not matter for code. Expression web is a good because they save time for compile the code. even changes we make a little in design nothing in backend code.   i found a little difference between Casini and VS development server that if image putted in wrong way like <img src=”//img.png”/> instead of <img src=”/img.png”/> the error we make // instead of / that’s not worked in Expression web or Visual studio debugging but in Cassini it’s work fine.   Well i found that debug Blogengine.net in Expression web is a great thing because in VS they take a time like a minute to debug when you trying to debug first time. Expression Web save a time when we design themes within them and that’s much good option because web is also maked for design.   Well if you want to debug application faster then use casini but Expression web debugging is a good option when they take a long time to debug in Visual studio and EW debug them in a seconds.

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  • Software Design Idea for multi tier architecture

    - by Preyash
    I am currently investigating multi tier architecture design for a web based application in MVC3. I already have an architecture but not sure if its the best I can do in terms of extendability and performance. The current architecure has following components DataTier (Contains EF POCO objects) DomainModel (Contains Domain related objects) Global (Among other common things it contains Repository objects for CRUD to DB) Business Layer (Business Logic and Interaction between Data and Client and CRUD using repository) Web(Client) (which talks to DomainModel and Business but also have its own ViewModels for Create and Edit Views for e.g.) Note: I am using ValueInjector for convering one type of entity to another. (which is proving an overhead in this desing. I really dont like over doing this.) My question is am I having too many tiers in the above architecure? Do I really need domain model? (I think I do when I exposes my Business Logic via WCF to external clients). What is happening is that for a simple database insert it (1) create ViewModel (2) Convert ViewModel to DomainModel for Business to understand (3) Business Convert it to DataModel for Repository and then data comes back in the same order. Few things to consider, I am not looking for a perfect architecure solution as it does not exits. I am looking for something that is scalable. It should resuable (for e.g. using design patterns ,interfaces, inheritance etc.) Each Layers should be easily testable. Any suggestions or comments is much appriciated. Thanks,

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  • Avoid loading unnecessary data from db into objects (web pages)

    - by GmGr
    Really newbie question coming up. Is there a standard (or good) way to deal with not needing all of the information that a database table contains loaded into every associated object. I'm thinking in the context of web pages where you're only going to use the objects to build a single page rather than an application with longer lived objects. For example, lets say you have an Article table containing id, title, author, date, summary and fullContents fields. You don't need the fullContents to be loaded into the associated objects if you're just showing a page containing a list of articles with their summaries. On the other hand if you're displaying a specific article you might want every field loaded for that one article and maybe just the titles for the other articles (e.g. for display in a recent articles sidebar). Some techniques I can think of: Don't worry about it, just load everything from the database every time. Have several different, possibly inherited, classes for each table and create the appropriate one for the situation (e.g. SummaryArticle, FullArticle). Use one class but set unused properties to null at creation if that field is not needed and be careful. Give the objects access to the database so they can load some fields on demand. Something else? All of the above seem to have fairly major disadvantages. I'm fairly new to programming, very new to OOP and totally new to databases so I might be completely missing the obvious answer here. :)

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  • Which book should I pick to improve my program designs/design patterns?

    - by zxcvbnm
    I want to learn about design patterns and from what I've seen the most recommended ones are the Gang of Four's Design Patterns and Head First Design Patterns. There are also language specific books, but I never see them recommended. I suppose it ties you to whatever strengths/weaknesses are inherent to each language, so not a good idea to learn design patterns in general. The Gang of Four's book is kinda old, so I'm wondering if there isn't a better alternative out today? I've heard the Heard First one isn't quite as good. But I'm not sure why, so it's really hard to pick either one. I've see some answers on this very site recommending both, but if I can only read one, which should I pick? I've been coding for 3+ years, though I've never had a good class on this subject. Also, would a book like Code Complete help me with this? One more thing: how often are these techniques supposed to be useful? For example, this question has me wondering if this stuff is worth the trouble. And please, tell me more than just "read x". I'd like to know why you're suggesting x.

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  • What is the best way to store site configuration data?

    - by DaveDev
    I have a question about storing site configuration data. We have a platform for web applications. The idea is that different clients can have their data hosted and displayed on their own site which sits on top of this platform. Each site has a configuration which determines which panels relevant to the client appear on which pages. The system was originally designed to keep all the configuration data for each site in a database. When the site is loaded all the configuration data is loaded into a SiteConfiguration object, and the clients panels are generated based on the content of this object. This works, but I find it very difficult to work with to apply change requests or add new sites because there is so much data to sift through and it's difficult maintain a mental model of the site and its configuration. Recently I've been tasked with developing a subset of some of the sites to be generated as PDF documents for printing. I decided to take a different approach to how I would define the configuration in that instead of storing configuration data in the database, I wrote XML files to contain the data. I find it much easier to work with because instead of reading meaningless rows of data which are related to other meaningless rows of data, I have meaningful documents with semantic, readable information with the relationships defined by visually understandable element nesting. So now with these 2 approaches to storing site configuration data, I'd like to get the opinions of people more experienced in dealing with this issue on dealing with these two approaches. What is the best way of storing site configuration data? Is there a better way than the two ways I outlined here? note: StackOverflow is telling me the question appears to be subjective and is likely to be closed. I'm not trying to be subjective. I'd like to know how best to approach this issue next time and if people with industry experience on this could provide some input.

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  • MVC design patterns

    - by insane-36
    I have an application and it does not use a very good structure. However it seems to me that I have tried to stick to mvc design pattern but a senior engineer claims that I have no design patterns and code are mesh. How I have structured the code : I have couple of nsmanagedobject model classes which represents model in my case and a reskit library which encapsulates the nsurlconnection and url request. I fetch the request from the view controller itself and then when the request get completed I create predicate and then populate it in tableview. Wherever I need custom view either I create it in nib or create in a custom subclass of UIView. I have use delegation pattern and notification to communication to view controller, views and block callback with restkit. But, the senior engineer is very new to ios. He has been doing it for 2 months now but he is a good java programmer. So, what is mvc pattern ? Is core data model not working as a model objects, view controller as controller and views. I dont seem to find any other places or any other cases to create my own model object since the most of the models are used as NSManagedObject subclass.

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  • Announcing release of ASP.NET MVC 3, IIS Express, SQL CE 4, Web Farm Framework, Orchard, WebMatrix

    - by ScottGu
    I’m excited to announce the release today of several products: ASP.NET MVC 3 NuGet IIS Express 7.5 SQL Server Compact Edition 4 Web Deploy and Web Farm Framework 2.0 Orchard 1.0 WebMatrix 1.0 The above products are all free. They build upon the .NET 4 and VS 2010 release, and add a ton of additional value to ASP.NET (both Web Forms and MVC) and the Microsoft Web Server stack. ASP.NET MVC 3 Today we are shipping the final release of ASP.NET MVC 3.  You can download and install ASP.NET MVC 3 here.  The ASP.NET MVC 3 source code (released under an OSI-compliant open source license) can also optionally be downloaded here. ASP.NET MVC 3 is a significant update that brings with it a bunch of great features.  Some of the improvements include: Razor ASP.NET MVC 3 ships with a new view-engine option called “Razor” (in addition to continuing to support/enhance the existing .aspx view engine).  Razor minimizes the number of characters and keystrokes required when writing a view template, and enables a fast, fluid coding workflow. Unlike most template syntaxes, with Razor you do not need to interrupt your coding to explicitly denote the start and end of server blocks within your HTML. The Razor parser is smart enough to infer this from your code. This enables a compact and expressive syntax which is clean, fast and fun to type.  You can learn more about Razor from some of the blog posts I’ve done about it over the last 6 months Introducing Razor New @model keyword in Razor Layouts with Razor Server-Side Comments with Razor Razor’s @: and <text> syntax Implicit and Explicit code nuggets with Razor Layouts and Sections with Razor Today’s release supports full code intellisense support for Razor (both VB and C#) with Visual Studio 2010 and the free Visual Web Developer 2010 Express. JavaScript Improvements ASP.NET MVC 3 enables richer JavaScript scenarios and takes advantage of emerging HTML5 capabilities. The AJAX and Validation helpers in ASP.NET MVC 3 now use an Unobtrusive JavaScript based approach.  Unobtrusive JavaScript avoids injecting inline JavaScript into HTML, and enables cleaner separation of behavior using the new HTML 5 “data-“ attribute convention (which conveniently works on older browsers as well – including IE6). This keeps your HTML tight and clean, and makes it easier to optionally swap out or customize JS libraries.  ASP.NET MVC 3 now includes built-in support for posting JSON-based parameters from client-side JavaScript to action methods on the server.  This makes it easier to exchange data across the client and server, and build rich JavaScript front-ends.  We think this capability will be particularly useful going forward with scenarios involving client templates and data binding (including the jQuery plugins the ASP.NET team recently contributed to the jQuery project).  Previous releases of ASP.NET MVC included the core jQuery library.  ASP.NET MVC 3 also now ships the jQuery Validate plugin (which our validation helpers use for client-side validation scenarios).  We are also now shipping and including jQuery UI by default as well (which provides a rich set of client-side JavaScript UI widgets for you to use within projects). Improved Validation ASP.NET MVC 3 includes a bunch of validation enhancements that make it even easier to work with data. Client-side validation is now enabled by default with ASP.NET MVC 3 (using an onbtrusive javascript implementation).  Today’s release also includes built-in support for Remote Validation - which enables you to annotate a model class with a validation attribute that causes ASP.NET MVC to perform a remote validation call to a server method when validating input on the client. The validation features introduced within .NET 4’s System.ComponentModel.DataAnnotations namespace are now supported by ASP.NET MVC 3.  This includes support for the new IValidatableObject interface – which enables you to perform model-level validation, and allows you to provide validation error messages specific to the state of the overall model, or between two properties within the model.  ASP.NET MVC 3 also supports the improvements made to the ValidationAttribute class in .NET 4.  ValidationAttribute now supports a new IsValid overload that provides more information about the current validation context, such as what object is being validated.  This enables richer scenarios where you can validate the current value based on another property of the model.  We’ve shipped a built-in [Compare] validation attribute  with ASP.NET MVC 3 that uses this support and makes it easy out of the box to compare and validate two property values. You can use any data access API or technology with ASP.NET MVC.  This past year, though, we’ve worked closely with the .NET data team to ensure that the new EF Code First library works really well for ASP.NET MVC applications.  These two posts of mine cover the latest EF Code First preview and demonstrates how to use it with ASP.NET MVC 3 to enable easy editing of data (with end to end client+server validation support).  The final release of EF Code First will ship in the next few weeks. Today we are also publishing the first preview of a new MvcScaffolding project.  It enables you to easily scaffold ASP.NET MVC 3 Controllers and Views, and works great with EF Code-First (and is pluggable to support other data providers).  You can learn more about it – and install it via NuGet today - from Steve Sanderson’s MvcScaffolding blog post. Output Caching Previous releases of ASP.NET MVC supported output caching content at a URL or action-method level. With ASP.NET MVC V3 we are also enabling support for partial page output caching – which allows you to easily output cache regions or fragments of a response as opposed to the entire thing.  This ends up being super useful in a lot of scenarios, and enables you to dramatically reduce the work your application does on the server.  The new partial page output caching support in ASP.NET MVC 3 enables you to easily re-use cached sub-regions/fragments of a page across multiple URLs on a site.  It supports the ability to cache the content either on the web-server, or optionally cache it within a distributed cache server like Windows Server AppFabric or memcached. I’ll post some tutorials on my blog that show how to take advantage of ASP.NET MVC 3’s new output caching support for partial page scenarios in the future. Better Dependency Injection ASP.NET MVC 3 provides better support for applying Dependency Injection (DI) and integrating with Dependency Injection/IOC containers. With ASP.NET MVC 3 you no longer need to author custom ControllerFactory classes in order to enable DI with Controllers.  You can instead just register a Dependency Injection framework with ASP.NET MVC 3 and it will resolve dependencies not only for Controllers, but also for Views, Action Filters, Model Binders, Value Providers, Validation Providers, and Model Metadata Providers that you use within your application. This makes it much easier to cleanly integrate dependency injection within your projects. Other Goodies ASP.NET MVC 3 includes dozens of other nice improvements that help to both reduce the amount of code you write, and make the code you do write cleaner.  Here are just a few examples: Improved New Project dialog that makes it easy to start new ASP.NET MVC 3 projects from templates. Improved Add->View Scaffolding support that enables the generation of even cleaner view templates. New ViewBag property that uses .NET 4’s dynamic support to make it easy to pass late-bound data from Controllers to Views. Global Filters support that allows specifying cross-cutting filter attributes (like [HandleError]) across all Controllers within an app. New [AllowHtml] attribute that allows for more granular request validation when binding form posted data to models. Sessionless controller support that allows fine grained control over whether SessionState is enabled on a Controller. New ActionResult types like HttpNotFoundResult and RedirectPermanent for common HTTP scenarios. New Html.Raw() helper to indicate that output should not be HTML encoded. New Crypto helpers for salting and hashing passwords. And much, much more… Learn More about ASP.NET MVC 3 We will be posting lots of tutorials and samples on the http://asp.net/mvc site in the weeks ahead.  Below are two good ASP.NET MVC 3 tutorials available on the site today: Build your First ASP.NET MVC 3 Application: VB and C# Building the ASP.NET MVC 3 Music Store We’ll post additional ASP.NET MVC 3 tutorials and videos on the http://asp.net/mvc site in the future. Visit it regularly to find new tutorials as they are published. How to Upgrade Existing Projects ASP.NET MVC 3 is compatible with ASP.NET MVC 2 – which means it should be easy to update existing MVC projects to ASP.NET MVC 3.  The new features in ASP.NET MVC 3 build on top of the foundational work we’ve already done with the MVC 1 and MVC 2 releases – which means that the skills, knowledge, libraries, and books you’ve acquired are all directly applicable with the MVC 3 release.  MVC 3 adds new features and capabilities – it doesn’t obsolete existing ones. You can upgrade existing ASP.NET MVC 2 projects by following the manual upgrade steps in the release notes.  Alternatively, you can use this automated ASP.NET MVC 3 upgrade tool to easily update your  existing projects. Localized Builds Today’s ASP.NET MVC 3 release is available in English.  We will be releasing localized versions of ASP.NET MVC 3 (in 9 languages) in a few days.  I’ll blog pointers to the localized downloads once they are available. NuGet Today we are also shipping NuGet – a free, open source, package manager that makes it easy for you to find, install, and use open source libraries in your projects. It works with all .NET project types (including ASP.NET Web Forms, ASP.NET MVC, WPF, WinForms, Silverlight, and Class Libraries).  You can download and install it here. NuGet enables developers who maintain open source projects (for example, .NET projects like Moq, NHibernate, Ninject, StructureMap, NUnit, Windsor, Raven, Elmah, etc) to package up their libraries and register them with an online gallery/catalog that is searchable.  The client-side NuGet tools – which include full Visual Studio integration – make it trivial for any .NET developer who wants to use one of these libraries to easily find and install it within the project they are working on. NuGet handles dependency management between libraries (for example: library1 depends on library2). It also makes it easy to update (and optionally remove) libraries from your projects later. It supports updating web.config files (if a package needs configuration settings). It also allows packages to add PowerShell scripts to a project (for example: scaffold commands). Importantly, NuGet is transparent and clean – and does not install anything at the system level. Instead it is focused on making it easy to manage libraries you use with your projects. Our goal with NuGet is to make it as simple as possible to integrate open source libraries within .NET projects.  NuGet Gallery This week we also launched a beta version of the http://nuget.org web-site – which allows anyone to easily search and browse an online gallery of open source packages available via NuGet.  The site also now allows developers to optionally submit new packages that they wish to share with others.  You can learn more about how to create and share a package here. There are hundreds of open-source .NET projects already within the NuGet Gallery today.  We hope to have thousands there in the future. IIS Express 7.5 Today we are also shipping IIS Express 7.5.  IIS Express is a free version of IIS 7.5 that is optimized for developer scenarios.  It works for both ASP.NET Web Forms and ASP.NET MVC project types. We think IIS Express combines the ease of use of the ASP.NET Web Server (aka Cassini) currently built-into Visual Studio today with the full power of IIS.  Specifically: It’s lightweight and easy to install (less than 5Mb download and a quick install) It does not require an administrator account to run/debug applications from Visual Studio It enables a full web-server feature set – including SSL, URL Rewrite, and other IIS 7.x modules It supports and enables the same extensibility model and web.config file settings that IIS 7.x support It can be installed side-by-side with the full IIS web server as well as the ASP.NET Development Server (they do not conflict at all) It works on Windows XP and higher operating systems – giving you a full IIS 7.x developer feature-set on all Windows OS platforms IIS Express (like the ASP.NET Development Server) can be quickly launched to run a site from a directory on disk.  It does not require any registration/configuration steps. This makes it really easy to launch and run for development scenarios.  You can also optionally redistribute IIS Express with your own applications if you want a lightweight web-server.  The standard IIS Express EULA now includes redistributable rights. Visual Studio 2010 SP1 adds support for IIS Express.  Read my VS 2010 SP1 and IIS Express blog post to learn more about what it enables.  SQL Server Compact Edition 4 Today we are also shipping SQL Server Compact Edition 4 (aka SQL CE 4).  SQL CE is a free, embedded, database engine that enables easy database storage. No Database Installation Required SQL CE does not require you to run a setup or install a database server in order to use it.  You can simply copy the SQL CE binaries into the \bin directory of your ASP.NET application, and then your web application can use it as a database engine.  No setup or extra security permissions are required for it to run. You do not need to have an administrator account on the machine. Just copy your web application onto any server and it will work. This is true even of medium-trust applications running in a web hosting environment. SQL CE runs in-memory within your ASP.NET application and will start-up when you first access a SQL CE database, and will automatically shutdown when your application is unloaded.  SQL CE databases are stored as files that live within the \App_Data folder of your ASP.NET Applications. Works with Existing Data APIs SQL CE 4 works with existing .NET-based data APIs, and supports a SQL Server compatible query syntax.  This means you can use existing data APIs like ADO.NET, as well as use higher-level ORMs like Entity Framework and NHibernate with SQL CE.  This enables you to use the same data programming skills and data APIs you know today. Supports Development, Testing and Production Scenarios SQL CE can be used for development scenarios, testing scenarios, and light production usage scenarios.  With the SQL CE 4 release we’ve done the engineering work to ensure that SQL CE won’t crash or deadlock when used in a multi-threaded server scenario (like ASP.NET).  This is a big change from previous releases of SQL CE – which were designed for client-only scenarios and which explicitly blocked running in web-server environments.  Starting with SQL CE 4 you can use it in a web-server as well. There are no license restrictions with SQL CE.  It is also totally free. Tooling Support with VS 2010 SP1 Visual Studio 2010 SP1 adds support for SQL CE 4 and ASP.NET Projects.  Read my VS 2010 SP1 and SQL CE 4 blog post to learn more about what it enables.  Web Deploy and Web Farm Framework 2.0 Today we are also releasing Microsoft Web Deploy V2 and Microsoft Web Farm Framework V2.  These services provide a flexible and powerful way to deploy ASP.NET applications onto either a single server, or across a web farm of machines. You can learn more about these capabilities from my previous blog posts on them: Introducing the Microsoft Web Farm Framework Automating Deployment with Microsoft Web Deploy Visit the http://iis.net website to learn more and install them. Both are free. Orchard 1.0 Today we are also releasing Orchard v1.0.  Orchard is a free, open source, community based project.  It provides Content Management System (CMS) and Blogging System support out of the box, and makes it possible to easily create and manage web-sites without having to write code (site owners can customize a site through the browser-based editing tools built-into Orchard).  Read these tutorials to learn more about how you can setup and manage your own Orchard site. Orchard itself is built as an ASP.NET MVC 3 application using Razor view templates (and by default uses SQL CE 4 for data storage).  Developers wishing to extend an Orchard site with custom functionality can open and edit it as a Visual Studio project – and add new ASP.NET MVC Controllers/Views to it.  WebMatrix 1.0 WebMatrix is a new, free, web development tool from Microsoft that provides a suite of technologies that make it easier to enable website development.  It enables a developer to start a new site by browsing and downloading an app template from an online gallery of web applications (which includes popular apps like Umbraco, DotNetNuke, Orchard, WordPress, Drupal and Joomla).  Alternatively it also enables developers to create and code web sites from scratch. WebMatrix is task focused and helps guide developers as they work on sites.  WebMatrix includes IIS Express, SQL CE 4, and ASP.NET - providing an integrated web-server, database and programming framework combination.  It also includes built-in web publishing support which makes it easy to find and deploy sites to web hosting providers. You can learn more about WebMatrix from my Introducing WebMatrix blog post this summer.  Visit http://microsoft.com/web to download and install it today. Summary I’m really excited about today’s releases – they provide a bunch of additional value that makes web development with ASP.NET, Visual Studio and the Microsoft Web Server a lot better.  A lot of folks worked hard to share this with you today. On behalf of my whole team – we hope you enjoy them! Scott P.S. In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu

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  • BAM design pointers

    - by Kavitha Srinivasan
    In working recently with a large Oracle customer on SOA and BAM, I discovered that some BAM best practices are not quite well known as I had always assumed ! There is a doc bug out to formally incorporate those learnings but here are a few notes..  EMS-DO parity When using EMS (Enterprise Message Source) as a BAM feed, the best practice is to use one EMS to write to one Data Object. There is a possibility of collisions and duplicates when multiple EMS write to the same row of a DO at the same time. This customer had 17 EMS writing to one DO at the same time. Every sensor in their BPEL process writes to one topic but the Topic was read by 1 EMS corresponding to one sensor. They then used XSL within BAM to transform the payload into the BAM DO format. And hence for a given BPEL instance, 17 sensors fired, populated 1 JMS topic, was consumed by 17 EMS which in turn wrote to 1 DataObject.(You can image what would happen for later versions of the application that needs to send more information to BAM !).  We modified their design to use one Master XSL based on sensorname for all sensors relating to a DO- say Data Object 'Orders' and were able to thus reduce the 17 EMS to 1 with a master XSL. For those of you wondering about how squeaky clean this design is, you are right ! This is indeed not squeaky clean and that brings us to yet another 'inferred' best practice. (I try very hard not to state the obvious in my blogs with the hope that everytime I blog, it is very useful but this one is an exception.) Transformations and Calculations It is optimal to do transformations within an engine like BPEL. Not only does this provide modelling ease with a nice GUI XSL mapper in JDeveloper, the XSL engine in BPEL is quite efficient at runtime as well. And so, doing XSL transformations in BAM is not quite prudent.  The same is true for any non-trivial calculations as well. It is best to do all transformations,calcuations and sanitize the data in a BPEL or like layer and then send this to BAM (via JMS, WS etc.) This then delegates simply the function of report rendering and mechanics of real-time reporting to the Oracle BAM reporting tool which it is most suited to do. All nulls are not created equal Here is yet another possibly known fact but reiterated here. For an EMS with an Upsert operation: a) If Empty tags or tags with no value are sent like <Tag1/> or <Tag1></Tag1>, the DO will be overwritten with --null-- b) If Empty tags are suppressed ie not generated at all, the corresponding DO field will NOT be overwritten. The field will have whatever value existed previously.  For an EMS with an Insert operation, both tags with an empty value and no tags result in –null-- being written to the DO. Hope this helps .. Happy 4th!

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  • should I ever put a major version number into a C#/Java namespace?

    - by Andrew Patterson
    I am designing a set of 'service' layer objects (data objects and interface definitions) for a WCF web service (that will be consumed by third party clients i.e. not in-house, so outside my direct control). I know that I am not going to get the interface definition exactly right - and am wanting to prepare for the time when I know that I will have to introduce a breaking set of new data objects. However, the reality of the world I am in is that I will also need to run my first version simultaneously for quite a while. The first version of my service will have URL of http://host/app/v1service.svc and when the times comes by new version will live at http://host/app/v2service.svc However, when it comes to the data objects and interfaces, I am toying with putting the 'major' version of the interface number into the actual namespace of the classes. namespace Company.Product.V1 { [DataContract(Namespace = "company-product-v1")] public class Widget { [DataMember] string widgetName; } public interface IFunction { Widget GetWidgetData(int code); } } When the time comes for a fundamental change to the service, I will introduce some classes like namespace Company.Product.V2 { [DataContract(Namespace = "company-product-v2")] public class Widget { [DataMember] int widgetCode; [DataMember] int widgetExpiry; } public interface IFunction { Widget GetWidgetData(int code); } } The advantages as I see it are that I will be able to have a single set of code serving both interface versions, sharing functionality where possible. This is because I will be able to reference both interface versions as a distinct set of C# objects. Similarly, clients may use both interface versions simultaneously, perhaps using V1.Widget in some legacy code whilst new bits move on to V2.Widget. Can anyone tell why this is a stupid idea? I have a nagging feeling that this is a bit smelly.. notes: I am obviously not proposing every single new version of the service would be in a new namespace. Presumably I will do as many non-breaking interface changes as possible, but I know that I will hit a point where all the data modelling will probably need a significant rewrite. I understand assembly versioning etc but I think this question is tangential to that type of versioning. But I could be wrong.

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  • Examples of temporal database designs? [closed]

    - by miku
    I'm researching various database design for historical record keeping - because I would like to implement a prototypical web application that (excessively) tracks changes made by users and let them undo things, see revisions, etc. I'd love use mercurial or git as backend (with files as records) - since they already implement the kind of append-only changes I imagine. I tried git and dulwich (python git API) - and it went ok - but I was concerned about performance; Bi-temporal database design lets you store a row along with time periods, when this record was valid. This sure sound more performant than to operate on files on disk (as in 1.) - but I had little luck finding real-world examples (e.g. from open source projects), that use this kind of design and are approachable enough to learn from them. Revisions à la MediaWiki revisions or an extra table for versions, as in Redmine. The problem here is, that DELETE would take the whole history with it. I looked at NoSQL solutions, too. With a document oriented approach, it would be simple to just store the whole history of an entity within the document itself - which would reduce design plus implementation time in contrast to a RDBMS approach. However, in this case I'm a bit concerned about ACID-properties, which would be important in the application. I'd like ask about experiences about real-world and pragmatic designs for temporal data.

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  • Windows Azure Recipe: Social Web / Big Media

    - by Clint Edmonson
    With the rise of social media there’s been an explosion of special interest media web sites on the web. From athletics to board games to funny animal behaviors, you can bet there’s a group of people somewhere on the web talking about it. Social media sites allow us to interact, share experiences, and bond with like minded enthusiasts around the globe. And through the power of software, we can follow trends in these unique domains in real time. Drivers Reach Scalability Media hosting Global distribution Solution Here’s a sketch of how a social media application might be built out on Windows Azure: Ingredients Traffic Manager (optional) – can be used to provide hosting and load balancing across different instances and/or data centers. Perfect if the solution needs to be delivered to different cultures or regions around the world. Access Control – this service is essential to managing user identity. It’s backed by a full blown implementation of Active Directory and allows the definition and management of users, groups, and roles. A pre-built ASP.NET membership provider is included in the training kit to leverage this capability but it’s also flexible enough to be combined with external Identity providers including Windows LiveID, Google, Yahoo!, and Facebook. The provider model has extensibility points to hook into other identity providers as well. Web Role – hosts the core of the web application and presents a central social hub users. Database – used to store core operational, functional, and workflow data for the solution’s web services. Caching (optional) – as a web site traffic grows caching can be leveraged to keep frequently used read-only, user specific, and application resource data in a high-speed distributed in-memory for faster response times and ultimately higher scalability without spinning up more web and worker roles. It includes a token based security model that works alongside the Access Control service. Tables (optional) – for semi-structured data streams that don’t need relational integrity such as conversations, comments, or activity streams, tables provide a faster and more flexible way to store this kind of historical data. Blobs (optional) – users may be creating or uploading large volumes of heterogeneous data such as documents or rich media. Blob storage provides a scalable, resilient way to store terabytes of user data. The storage facilities can also integrate with the Access Control service to ensure users’ data is delivered securely. Content Delivery Network (CDN) (optional) – for sites that service users around the globe, the CDN is an extension to blob storage that, when enabled, will automatically cache frequently accessed blobs and static site content at edge data centers around the world. The data can be delivered statically or streamed in the case of rich media content. Training These links point to online Windows Azure training labs and resources where you can learn more about the individual ingredients described above. (Note: The entire Windows Azure Training Kit can also be downloaded for offline use.) Windows Azure (16 labs) Windows Azure is an internet-scale cloud computing and services platform hosted in Microsoft data centers, which provides an operating system and a set of developer services which can be used individually or together. It gives developers the choice to build web applications; applications running on connected devices, PCs, or servers; or hybrid solutions offering the best of both worlds. New or enhanced applications can be built using existing skills with the Visual Studio development environment and the .NET Framework. With its standards-based and interoperable approach, the services platform supports multiple internet protocols, including HTTP, REST, SOAP, and plain XML SQL Azure (7 labs) Microsoft SQL Azure delivers on the Microsoft Data Platform vision of extending the SQL Server capabilities to the cloud as web-based services, enabling you to store structured, semi-structured, and unstructured data. Windows Azure Services (9 labs) As applications collaborate across organizational boundaries, ensuring secure transactions across disparate security domains is crucial but difficult to implement. Windows Azure Services provides hosted authentication and access control using powerful, secure, standards-based infrastructure. See my Windows Azure Resource Guide for more guidance on how to get started, including links web portals, training kits, samples, and blogs related to Windows Azure.

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  • How to improve designer and developer work flow?

    - by mbdev
    I work in a small startup with two front end developers and one designer. Currently the process starts with the designer sending a png file with the whole page design and assets if needed. My task as front end developer is to convert it to a HTML/CSS page. My work flow currently looks like this: Lay out the distinct parts using html elements. Style each element very roughly (floats, minimal fonts and padding) so I can modify it using inspection. Using Chrome Developer Tools (inspect) add/change css attributes while updating the css file. Refresh the page after X amount of changes Use Pixel Perfect to refine the design more. Sit with the designer to make last adjustments. Inferring the paddings, margins, font sizes using trial and error takes a lot of time and I feel the process could become more efficient but not sure how to improve it. Using PSD files is not an option since buying Photoshop for each developer is currently not considered. Design guide is also not available since design is still evolving and new features are introduced. Ideas for improving the process above and sharing how the process looks like in your company will be great.

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