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  • Collision detection with curves

    - by paldepind
    I'm working on a 2D game in which I would like to do collision detection between a moving circle and some kind of static curves (maybe Bezier curves). Currently my game features only straight lines as the static geometry and I'm doing the collision detection by calculating the distance from the circle to the lines, and projecting the circle out of the line in case the distance is less than the circles radius. How can I do this kind of collision detection in a relative straightforward way? I know for instance that Box2D features collision detection with Bezier curves. I don't need a full featured collision detection mechanism, just something that can do what I've described.

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  • VBoxManage modifyhd --resize doesn't exist?

    - by George Korac
    I'm trying to increase the size of a VirtualBox Win7 .vdi disk on Ubuntu 10.04 but when I try executing VBoxManage modifyhd /path/disk.vdi --resize 15360 it returns Syntax error: unknown option: --resize. I'm unsure as to why this is happening because I've used it before and it's still listed under valid options for VBoxManage modifyhd in the VirualBox User Manual . Cheers, George @maniat1k george@george-laptop:~$ VBoxManage modifyhd '/home/george/.VirtualBox/HardDisks/Windows 7 64bit.vdi' --resize 15360 Sun VirtualBox Command Line Management Interface Version 3.1.6_OSE (C) 2005-2010 Sun Microsystems, Inc. All rights reserved. Usage: VBoxManage modifyhd | [--type normal|writethrough|immutable] [--autoreset on|off] [--compact] Syntax error: unknown option: --resize

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  • links for 2010-04-01

    - by Bob Rhubart
    Jason Williamson: Oracle Releases New Mainframe Re-Hosting in Oracle Tuxedo 11g Jason Williamson's update on new features in the latest release of Oracle Tuxedo 11g. (tags: otn oracle entarch) Jeanne Waldman: Using Oracle ADF Data Visualization Tools (DVT) Line Graphs to Display Weather Information Jeanne Waldman illustrates the nuts and bolts of modifications she made to a a simple JDeveloper Fusion application that retrieves weather data. I have a simple JDeveloper Fusion application that retrieves weather data. (tags: oracle otn virtualization jdeveloper ADF) Brian Harrison: Oracle WebCenter Interaction - New Release Overivew, Part 2 Brian Harrison continue his discussion of the next release of Oracle WebCenter Interaction with a look at at a few other new features. (tags: oracle otn enterprise2.0 webcenter)

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  • Visual Studio 2012 - Express vs Professional

    - by Dan
    I'm having trouble finding a feature comparison between Visual Studio 2012 express edition and the professional edition. I'm using the trial Profession version at the moment, but it'll run out soon, so I need to make a decision whether to purchase the full version. Obviously I can just try both initially and see if the express edition is suitable, but the problem is that there are that many features in Visual Studio, there might be a really useful feature that was missing in the standard edition that I didn't even know existed! Or I didn't spot was missing until later down the line. I could really do with a feature comparison list like the one for all non-express editions here. It's a shame that page doesn't include the express edition. (as a side note, there doesn't seem to be a visual-studio-2012 tag, so I had to just use visual-studio. Could someone with enough rep to create tags add a visual-studio-2012 tag?)

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  • Intel Xeon 5600 (Westmere-EP) and AMD Magny-Cours Performance Update

    - by jchang
    HP has just released TPC-C and TPC-E results for the ProLiant DL380G7 with 2 Xeon 5680 3.33GHz 6-core processor, allowing a direct comparison with their DL385G& with 2 Opteron 6176 2.3GHz 12-core processors. Last month I complained about the lack of performance results for the Intel Xeon 5600 6-core 32nm processor line for 2-way systems. This might have been deliberate to not complicate the message for the Xeon 7500 8-core 45nm (for 4-way+ systems) launch two weeks later. http://sqlblog.com/blogs/joe_chang/archive/2010/04/07/intel-xeon-5600-westmere-ep-and-7500-nehalem-ex.aspx...(read more)

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  • Oracle WebCenter: uma nova vis&atilde;o para os Portais

    - by Denisd
    O conceito de “Portal” existe há muito tempo, mas está sempre mudando. Afinal de contas, o que é um portal? Nos primórdios da internet, o termo “portal” era utilizado para sites que guardavam muitas páginas (ou seja, muita informação). “Portal de notícias” era um termo comum, embora estes “portais” não passassem de um conjunto de páginas estáticas, que basicamente serviam conteúdo aos usuários. Com a evolução da tecnologia, os web sites passaram a ficar mais dinâmicos, permitindo uma interação maior do usuário. Sites de comunidades sociais são o melhor exemplo disso. Neste momento, o “portal” passou a ser não apenas um grupo de páginas, mas um conjunto de serviços e recursos dinâmicos, como a possibilidade de publicar fotos e vídeos, e compartilhar este conteúdo com amigos on-line. Aqui temos o que podemos chamar de “Portais Sociais”. Ao mesmo tempo, dentro das empresas, outra mudança estava acontecendo: a criação de padrões de comunicação entre aplicativos, sendo o mais famoso destes padrões a tecnologia de Web Services. Com estes padrões, as aplicações podem trocar informações e facilitar a experiência dos usuários. Desta forma, é possível desenvolver mini-aplicativos (chamados “portlets”), que publicam informações dos sistemas corporativos nas páginas dos portais internos. Estes portlets permitem interações com os sistemas, para permitir que os usuários tenham acesso rápido e fácil às informações. Podemos chamar estes portais de “Portais Transacionais”. Aqui temos 2 pontos que eu gostaria de chamar a atenção: 1 – O desenvolvimento de portlets é necessário porque eu não consigo publicar uma aplicação inteira no portal, normalmente por uma questão de padrões de desenvolvimento. Explicando de uma forma simples, a aplicação não foi feita para rodar dentro de um portal. Portanto, é necessário desenvolvimento adicional para criar mini-aplicativos que replicam (ou melhor, duplicam) a lógica do aplicativo principal, dentro do portal. 2 – Os aplicativos corporativos normalmente não incluem os recursos colaborativos de um portal (por exemplo, fóruns de discussão, lista de contatos com sensores de presença on-line, wikis, tags, etc), simplesmente porque este tipo de recurso normalmente não está disponível de forma “empacotada” para ser utilizada em um aplicativo. Desta forma, se eu quiser que a minha aplicação tenha um fórum de discussão para que os meus clientes conversem com a minha equipe técnica, eu tenho que desenvolver todo o motor do fórum de discussão dentro do meu aplicativo, o que se torna inviável, devido ao custo, tempo e ao fato de que este tipo de recurso normalmente não está no escopo da minha aplicação. O que acaba acontecendo é que os usuários fazem a parte “transacional” dentro do aplicativo, mas acabam utilizando outras interfaces para atender suas demandas de colaboração (neste caso, utilizariam um fórum fora da aplicação para discutir problemas referentes ao aplicativo). O Oracle WebCenter 11g vem para resolver estes dois pontos citados acima. O WebCenter não é simplesmente um novo portal, com alguns recursos interessantes; ele é uma nova forma de se pensar em Portais Corporativos (portais que reúnem os cenários citados acima: conteúdo, social e transacional). O WebCenter 11g é extenso demais para ser descrito em um único post, e nem é a minha intenção entrar no detalhe deste produto agora. Mas podemos definir o WebCenter 11g como sendo 3 “coisas”: - Um framework de desenvolvimento, aonde os recursos que as minhas aplicações irão utilizar (por exemplo, validação de crédito, consulta à estoque, registro de um pedido, etc), são desenvolvidos de forma a serem reutilizados por qualquer outra aplicação ou portlet que seja executado neste framework. Este tipo de componente reutilizável é chamado de “Task Flow”. - Um conjunto de serviços voltados à colaboração, como fóruns, wikis, blogs, tags, links, people connections, busca, bibliotecas de documentos, etc. Todos estes recursos colaborativos também estão disponíveis como Task Flows, desta forma, qualquer aplicação que eu desenvolva pode se beneficiar destes recursos. - Um “Portal”, do ponto de vista tradicional, aonde os usuários podem criar páginas, inserir e compartilhar conteúdo com outros usuários. Este Portal consegue utilizar os recursos desenvolvidos no Framework, garantindo o reuso. A imagem abaixo traz uma visão deste Portal. Clique para ver em tamanho maior. A grande inovação que o WebCenter traz é que a divisão entre “portal” e “aplicação” desaparece: qualquer aplicação agora pode ser desenvolvida com recursos de portal. O meu sistema de CRM, por exemplo, pode ter um fórum de discussão para os clientes. O meu sistema de suporte pode utilizar Wikis para montar FAQs de forma rápida. O sistema financeiro pode incluir uma biblioteca de documentos para que o usuário possa consultar os manuais de procedimento. Portanto, não importa se eu estou desenvolvendo uma “aplicação” ou um “portal”; o que importa é que os meus usuários agora terão em uma única interface as funcionalidades dos aplicativos e os recursos de colaboração. Este conceito, dentro da Oracle, é chamado de “Composite Applications”, e é a base para a próxima geração dos aplicativos Oracle. Nos próximos posts iremos falar (é claro) sobre como o WebCenter e o UCM se relacionam, e que tipo de recursos podem ser aproveitados nas aplicações/portais. Até breve!

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  • Powershell STA watin

    - by Mike Koerner
    Wow, two posts on the same day. I was working on a quick DLL project to do some web scripting using the awsome power of Watin.  In the past I use to create a vbscript as the test handler to call the DLL but lately I got a Powershell bug to call .NET DLLs. When I tried to debug the Watin call I received: The CurrentThread needs to have it's ApartmentState set to ApartmentState.STA to be able to automate Internet Explorer. I couldn't find a quick google answer to powershell apartmentstate .  Apparently you can set the powershell apartment state by the command line -STA.  http://technet.microsoft.com/en-us/library/dd315276.aspx I've found that the powershell documentation and examples is lacking compared to the Microsoft support I've come to expect.  Why is the Powershell v2.0 in C:\WINDOWS\SYSTEM32\windowspowershell\v1.0 ?

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  • wpa_supplicant ioctl[SIOCSIWENCODEEXT]: Invalid argument

    - by RobinJ
    I just installed Ubuntu Server on a spare computer with a broken graphic card, and I needed to setup my wifi. I thought No problem, I've done it before from the command line, in Arch Linux., only the steps I had to take in Arch Linux didn't work in Ubuntu Server (that's odd, wasn't Ubuntu supposed to be so much more user-friendly? :/). This is what I'd normally do: ip link set wlan0 up wpa_passphrase <ESSID> <WPA KEY> > /etc/wpa_supplicant.conf wpa_supplicant -B -Dwext -i wlan0 -c /etc/wpa_supplicant.conf dhcpcd wlan0 Only at the wpa_supplicant I get some strane message: ioctl[SIOCSIWENCODEEXT]: Invalid argument ioctl[SIOCSIWENCODEEXT]: Invalid argument And if I try to run dhcpcd then (which I manually installed, as it didn't come preinstalled with Ubuntu Server), it times out. Help on how to do it would be much appreciated. My wireless driver is iwl3945.

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  • Objective C style nil in java?

    - by Usman Ismail
    Objective C has a concept of a nil object which would accept any method call with any parameters without complaining and silently return another nil. I have used something similar in Java using easymock and mockito for testing. Is there something similar for main line code? Is it even a good idea to have something like this? One use-case where I am considering using it is with optional metrics. We have codahale metrics counters on which we call mark() every time an event is generated. This is surrounded by an If/then to check for metrics enabled flag. I could just use a nil object as counter and silently accept the mark call if metrics are not enabled.

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  • Oracle WebLogic Server 12c Launch Event - Dec 1, 2011, 10am PT

    - by arungupta
    Calling all IT managers, architects, and developers, to find out how the new release of Oracle WebLogic Server 12c is: Designed to help you seamlessly move into the public or private cloud with an open, standards-based platform Built to drive higher value for your current infrastructure and significantly reduce development time and cost Optimized to run your solutions for Java Platform, Enterprise Edition (Java EE); Oracle Fusion Middleware; and Oracle Fusion Enhanced with transformational platforms and technologies such as Java EE 6, Oracle’s Active GridLink for RAC, Oracle Traffic Director, and Oracle Virtual Assembly Builder When ? Dec 1, 2011, 10am - 12pm PT Where ? Register online! Here are some other links for you to follow: blogs.oracle.com/weblogicserver @OracleWebLogic youtube.com/OracleWebLogic facebook.com/OracleWebLogic Steve Button's Blog Jeff West's Blog WebLogic Forums WebLogic @ OTN Almost ready to unwrap the ribbons, pop open the cork, at the start line ... or whatever fits your analogy :-) And in case you are wondering ... here is a snapshot of WebLogic 12c administration console snapshot:

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  • NullReferenceException when accessing variables in a 2D array in Unity

    - by Syed
    I have made a class including variables in Monodevelop which is: public class GridInfo : MonoBehaviour { public float initPosX; public float initPosY; public bool inUse; public int f; public int g; public int h; public GridInfo parent; public int y,x; } Now I am using its class variable in another class, Map.cs which is: public class Map : MonoBehaviour { public static GridInfo[,] Tile = new GridInfo[17, 23]; void Start() { Tile[0,0].initPosX = initPosX; //Line 49 } } I am not getting any error on runtime, but when I play in unity it is giving me error NullReferenceException: Object reference not set to an instance of an object Map.Start () (at Assets/Scripts/Map.cs:49) I am not inserting this script in any gameobject, as Map.cs will make a GridInfo type array, I have also tried using variables using GetComponent, where is the problem ?

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  • What are the pitfalls of hardlinked files on my desktop PC?

    - by MountainX
    All the identical-content files on my PC are now hardlinked. (My data is completely de-duplicated. It is a consequence of the way I copied my data from my old computer.) What pitfalls do I need to be aware of now that certain actions on one file could silently affect a number of other files? I know that deleting the file I'm working on is not a problem (assuming I deleted it on purpose). It doesn't affect any of the other hardlinked files and I don't see that the delete action would lead to unexpected side effects. Moving or renaming the file is not a problem. I don't see any unexpected consequences. I don't think copying hardlinked files is a problem, but I'm not as confident about any unexpected consequences in this regard. What I have seen is that making a copy (to the same disk) of a hardlinked file with cp keeps the copy hardlinked (i.e., inode number doesn't change in the copy). Copying to another filesystem obviously breaks the hardlink. (I guess one pitfall is forgetting this fact, given that my PC has 3 hard disks.) Changing permissions does affect all linked files. So far this has proven handy. (I made a large number of the hardlinked files read-only.) None of the operations above seem to produce any major unexpected consequences. However, as was pointed out to me by Daniel Beck in a comment, editing or modifying a file can sometimes be a problem. It depends on the tool and maybe the type of edit. (For example, editing small text files using sed seems to always break the link while using nano doesn't.) This introduces the chance that editing one file could affect all the hardlinked files (i.e., alter the original inode). My proposed solution to this is to make all hardlinked files read-only (and that is already mostly the case). If I can't do that for some files, I will unlink those particular files. Is there any problem with this read-only approach? I'm assuming that if I go to edit a file and find it to be read-only, I'll remember to unlink that filename while making it writable. So one pitfall might be forgetting this rule. In that case, I'll have to rely on my backups. Am I correct in the above statements? And what else do I need to know? BTW, I'm running Kubuntu 12.04. I'm also using btrfs. (I have 2 SSD's and 1 HDD in the PC. I will also be adding an external USB HDD. I'm also connected to a network and I mount some NFS shares. I don't assume any of these last bits are relevant to the question, but I'm adding them just in case.) BTW, since I have more than one drive (with separate file systems), to unlink any file all I have to do is copy it to another drive, then move it back. However, using sed also works (in my testing). Here's my script: sed -i 's/\(.\)/\1/' file1 Surprisingly, this even unlinks zero byte files. In my testing it also appears to work on non-text files without any special options. (But I understand that the --binary option might be needed on Windows, MS-DOS and Cygwin.) However, copying to another disk and moving back may be the best way to unlink. For my use-case, unlink command doesn't really "unlink", rather it "removes".

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  • CodePlex Daily Summary for Sunday, May 09, 2010

    CodePlex Daily Summary for Sunday, May 09, 2010New ProjectsArtificial Spy: ASPX, C#, XML, This is big project for creation application for: People Search. People connection. Background check. Crime Prevention. Socia...Chef Framework: CHEF: CSS, HTML, Events, & Functions. Is a collection of libraries to help build concerns separated websites.Crabit Full File Manger: File manager SystemEPiMVC - EPiServer CMS with ASP.NET MVC: A framework for using EPiServer CMS with ASP.NET MVC.Fimyid IX: all My projects In ONE!Hosting Folder Sizes: When you run a hosting environment with the ability to upload files, and you're charging per gigabyte per month, you need quick statistics about di...Let's Up: A tool that breaks you every 50 minutes to protect your health.MediaXenter: MediaXenterMSClub BY: Microsoft community web-site projectOrbisArca: Windows Mobile gameSpatial Gateway: A common and standardized way of accessing spatial data stored in different datastores. This also includes functionality for replication across dif...Squiggle - A Free open source Lan Messenger: Squiggle is a free lan messenger that does not require a server. Just download and run it and you're ready to talk to everyone on your lan. Squi...Video Downloader: Video Downloader makes it easier for developers to generate download links for videos from You-Tube. You'll no longer have to search through source...ViewModelSupport: This is not an MVVM framework. It is just the base class I use to reduce the friction when writing ViewModels. Making it public to share my ideas.WPF CCTV Surveillance Control with IP Cameras.: Integracion de Video IP en WPF. IP Camera. WPF dinamic Control and Events in Video System. Surveillance system. CCTV system. .NetNew Releases.NET Extensions - Extension Methods Library: Release 2010.07: Added some extension methods for ICollection<T> and IList<T> for demonstrating the differences between both interfaces: - ICollection<T>.AddRangeU...bitly.net: bitly.dll: This is a .net DLL that works with the on-line URL shortening service bit.ly Compiled using .net 4.0 but the source code should run with version 2 ...Crabit Full File Manger: Crabit V1.0: Firts file manager system previewCSharp Intellisense: V1.9: this is a major release that was focus on bug fix, tooltip support and styling.Fimyid IX: fimyid ix 1.0: New Liscence!Gherkin editor: Beta: Added support for i18n (all languages supported by Gherkin/Cucumber are suported). Removed auto-completion of statements like As a user and followi...Grunty OS: GruntyOSAlphaSC: Grunty os sourceHKGolden Express: HKGoldenExpress (Build 201005081830): New features: Users can post new message or reply to a message. Special thanks for help from members 劉佳偉 (ID: 179892) and Maize. (ID: 142974). Bu...iLove SharePoint: Lookup Field with Picker 2010: Just forget the fuc**** dropdowns! Requirements: SharePoint Foundation 2010 Features * Single- and multi-Selection Mode * Search in pick...LazyNet: LazyNet Beta 2: Refresh Network Bug fixed.LazyNet: LazyNEt_Beta3: Beta 3 Release, Better Network RefreshingLazyNet: LazyNetBeta3_SRC: Refresh NetworkLet's Up: 1.0 (Build 100509): This is the first versionLive Distributed Objects: Windows Installer r48444 (2010-05-08): current development snapshotMDownloader: MDownloader-0.15.12.58576: Fixed presenting Hotfile's captcha. Fixed FilesTube searching. Fixed determining Rapidshare postpone period. Fixed minor bugs.NSIS Autorun: NSIS Autorun 0.1.7: This release includes source code, executable binaries and example materials.SharpDevelop: SharpDevelop 3.2: Release notes: http://community.sharpdevelop.net/forums/t/11165.aspxSilverlight SDK for Bing: Silverlight SDK for Bing 1.4: Build for Visual Studio 2010 and Silverlight 4 Issues Addressed10337 10342 10367 10804 10805 10806 10807 DownloadsSilverlight SDK For B...sqwarea: Sqwarea 0.0.252.0 (alpha): This release corrects a critical bug in Persistence.GameProvider.GetNextKingId. We strongly recommend you to upgrade to this version.Stratosphere: Stratosphere 1.0.5.1: Added many features to Amazon Web Services Shell (AwsSh) Improved scalable table reader for SimpleDB multi-valued attributes Added more functio...TechEdOneNoter: TechEdOneNoter verison 2010.5.9.2010: TechEdOneNoter is a utility to create OneNote Pages based on sessions selected in the TechEd North America 2010 Session Builder. This is the first...Video Downloader: Version 1.0: Version 1.0 See Home Page for usage and more information. Please remember changes at You-Tube can prevent this software from working.Visual Studio - Lua Language Support: May 8th Update: Release NotesThis release adds collapsible functions and tables. What's new:Collapsible functions and tables Using latest version of Irony Maj...WPF CCTV Surveillance Control with IP Cameras.: Hungry Foxx CCTV Preview: Este release, corresponde a una muestra del programa completo. La idea es poder contar con una solucion para los integradores de sistemas CCTV o d...XsltDb - DotNetNuke XSLT module: 01.01.08: Bugs fixed: 17204 17203 Many new features, but undocumented yet. I'm going to update docs in a week or two, but...Most Popular ProjectsWBFS ManagerRawrAJAX Control ToolkitMicrosoft SQL Server Product Samples: DatabaseSilverlight ToolkitWindows Presentation Foundation (WPF)patterns & practices – Enterprise LibraryMicrosoft SQL Server Community & SamplesASP.NETPHPExcelMost Active Projectspatterns & practices – Enterprise LibraryRawrThe Information Literacy Education Learning Environment (ILE)AJAX Control FrameworkCaliburn: An Application Framework for WPF and SilverlightMirror Testing SystemjQuery Library for SharePoint Web Servicespatterns & practices - UnityBlogEngine.NETTweetSharp

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  • Oracle-AmberPoint Webcast: Learn How Your Business Can Profit from the Combination

    - by jyothi.swaroop
    With the recent acquisition of AmberPoint, Oracle now offers an enhanced end-to-end SOA solution that features runtime governance, business transaction management, and cross-platform management capabilities. Put that solution to work and your business can achieve lower costs of implementation and higher profit. Join Ed Horst, Vice President, Oracle (former CMO of AmberPoint), and Ashish Mohindroo, Senior Director, Product Marketing, Oracle, as they discuss in this live Webcast the customer advantages of the Oracle and AmberPoint combination. Learn how our SOA solutions with AmberPoint capabilities can help you: Achieve more agility and visibility into your business processes Increase control and performance of critical applications Improve performance and reduce IT costs to benefit your bottom line Register for the Live Webcast Event Date: Thursday, May 20, 2010 Time: 10 a.m. PT/1 p.m. ET

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  • Class Loading Deadlocks

    - by tomas.nilsson
    Mattis follows up on his previous post with one more expose on Class Loading Deadlocks As I wrote in a previous post, the class loading mechanism in Java is very powerful. There are many advanced techniques you can use, and when used wrongly you can get into all sorts of trouble. But one of the sneakiest deadlocks you can run into when it comes to class loading doesn't require any home made class loaders or anything. All you need is classes depending on each other, and some bad luck. First of all, here are some basic facts about class loading: 1) If a thread needs to use a class that is not yet loaded, it will try to load that class 2) If another thread is already loading the class, the first thread will wait for the other thread to finish the loading 3) During the loading of a class, one thing that happens is that the <clinit method of a class is being run 4) The <clinit method initializes all static fields, and runs any static blocks in the class. Take the following class for example: class Foo { static Bar bar = new Bar(); static { System.out.println("Loading Foo"); } } The first time a thread needs to use the Foo class, the class will be initialized. The <clinit method will run, creating a new Bar object and printing "Loading Foo" But what happens if the Bar object has never been used before either? Well, then we will need to load that class as well, calling the Bar <clinit method as we go. Can you start to see the potential problem here? A hint is in fact #2 above. What if another thread is currently loading class Bar? The thread loading class Foo will have to wait for that thread to finish loading. But what happens if the <clinit method of class Bar tries to initialize a Foo object? That thread will have to wait for the first thread, and there we have the deadlock. Thread one is waiting for thread two to initialize class Bar, thread two is waiting for thread one to initialize class Foo. All that is needed for a class loading deadlock is static cross dependencies between two classes (and a multi threaded environment): class Foo { static Bar b = new Bar(); } class Bar { static Foo f = new Foo(); } If two threads cause these classes to be loaded at exactly the same time, we will have a deadlock. So, how do you avoid this? Well, one way is of course to not have these circular (static) dependencies. On the other hand, it can be very hard to detect these, and sometimes your design may depend on it. What you can do in that case is to make sure that the classes are first loaded single threadedly, for example during an initialization phase of your application. The following program shows this kind of deadlock. To help bad luck on the way, I added a one second sleep in the static block of the classes to trigger the unlucky timing. Notice that if you uncomment the "//Foo f = new Foo();" line in the main method, the class will be loaded single threadedly, and the program will terminate as it should. public class ClassLoadingDeadlock { // Start two threads. The first will instansiate a Foo object, // the second one will instansiate a Bar object. public static void main(String[] arg) { // Uncomment next line to stop the deadlock // Foo f = new Foo(); new Thread(new FooUser()).start(); new Thread(new BarUser()).start(); } } class FooUser implements Runnable { public void run() { System.out.println("FooUser causing class Foo to be loaded"); Foo f = new Foo(); System.out.println("FooUser done"); } } class BarUser implements Runnable { public void run() { System.out.println("BarUser causing class Bar to be loaded"); Bar b = new Bar(); System.out.println("BarUser done"); } } class Foo { static { // We are deadlock prone even without this sleep... // The sleep just makes us more deterministic try { Thread.sleep(1000); } catch(InterruptedException e) {} } static Bar b = new Bar(); } class Bar { static { try { Thread.sleep(1000); } catch(InterruptedException e) {} } static Foo f = new Foo(); }

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  • Rotate Body From Corner

    - by Siddharth
    I want to ask that how to rotate body from corner? movableBeam.getBeamBody().setTransform(movableBeam.getBeamBody().getPosition(), angle); The above line of code rotate the beam from center that I want rotate from one of the conner. Any member please help me. EDIT : float beamCenterX = movableBeam.getX() + movableBeam.getWidth() / 2f; float beamCenterY = movableBeam.getY() + movableBeam.getHeight() / 2f; float cornerOffsetX = movableBeam.getX() - beamCenterX; float cornerOffsetY = movableBeam.getY() - beamCenterY; float bodyAngle = (float) Math.atan2(cornerOffsetY, cornerOffsetX); float newAngle = imageAngle + bodyAngle; float newCornerOffsetX = (float) Math.cos(Math .toDegrees(newAngle)); float newCornerOffsetY = (float) Math.sin(Math .toDegrees(newAngle)); cornerOffsetX = movableBeam.getX() - movableBeam.getWidth() / 2f; cornerOffsetY = movableBeam.getY() - movableBeam.getHeight() / 2f; Vector2 postion = new Vector2( (newCornerOffsetX - cornerOffsetX + movableBeam.getX()) / PhysicsConstants.PIXEL_TO_METER_RATIO_DEFAULT, (newCornerOffsetY - cornerOffsetY + movableBeam.getY()) / PhysicsConstants.PIXEL_TO_METER_RATIO_DEFAULT); movableBeam.getBeamBody().setTransform(postion, newAngle);

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  • Bitwise operators in DX9 ps_2_0 shader

    - by lapin
    I've got the following code in a shader: // v & y are both floats nPixel = v; nPixel << 8; nPixel |= y; and this gives me the following error in compilation: shader.fx(80,10): error X3535: Bitwise operations not supported on legacy targets. shader.fx(92,18): ID3DXEffectCompiler::CompileEffect: There was an error compiling expression ID3DXEffectCompiler: Compilation failed The error is on the following line: nPixel |= y; What am I doing wrong here?

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  • readonly keyword

    - by nmarun
    This is something new that I learned about the readonly keyword. Have a look at the following class: 1: public class MyClass 2: { 3: public string Name { get; set; } 4: public int Age { get; set; } 5:  6: private readonly double Delta; 7:  8: public MyClass() 9: { 10: Initializer(); 11: } 12:  13: public MyClass(string name = "", int age = 0) 14: { 15: Name = name; 16: Age = age; 17: Initializer(); 18: } 19:  20: private void Initializer() 21: { 22: Delta = 0.2; 23: } 24: } I have a couple of public properties and a private readonly member. There are two constructors – one that doesn’t take any parameters and the other takes two parameters to initialize the public properties. I’m also calling the Initializer method in both constructors to initialize the readonly member. Now when I build this, the code breaks and the Error window says: “A readonly field cannot be assigned to (except in a constructor or a variable initializer)” Two things after I read this message: It’s such a negative statement. I’d prefer something like: “A readonly field can be assigned to (or initialized) only in a constructor or through a variable initializer” But in my defense, I AM assigning it in a constructor (only indirectly). All I’m doing is creating a method that does it and calling it in a constructor. Turns out, .net was not ‘frameworked’ this way. We need to have the member initialized directly in the constructor. If you have multiple constructors, you can just use the ‘this’ keyword on all except the default constructors to call the default constructor. This default constructor can then initialize your readonly members. This will ensure you’re not repeating the code in multiple places. A snippet of what I’m talking can be seen below: 1: public class Person 2: { 3: public int UniqueNumber { get; set; } 4: public string Name { get; set; } 5: public int Age { get; set; } 6: public DateTime DateOfBirth { get; set; } 7: public string InvoiceNumber { get; set; } 8:  9: private readonly string Alpha; 10: private readonly int Beta; 11: private readonly double Delta; 12: private readonly double Gamma; 13:  14: public Person() 15: { 16: Alpha = "FDSA"; 17: Beta = 2; 18: Delta = 3.0; 19: Gamma = 0.0989; 20: } 21:  22: public Person(int uniqueNumber) : this() 23: { 24: UniqueNumber = uniqueNumber; 25: } 26: } See the syntax in line 22 and you’ll know what I’m talking about. So the default constructor gets called before the one in line 22. These are known as constructor initializers and they allow one constructor to call another. The other ‘myth’ I had about readonly members is that you can set it’s value only once. This was busted as well (I recall Adam and Jamie’s show). Say you’ve initialized the readonly member through a variable initializer. You can over-write this value in any of the constructors any number of times. 1: public class Person 2: { 3: public int UniqueNumber { get; set; } 4: public string Name { get; set; } 5: public int Age { get; set; } 6: public DateTime DateOfBirth { get; set; } 7: public string InvoiceNumber { get; set; } 8:  9: private readonly string Alpha = "asdf"; 10: private readonly int Beta = 15; 11: private readonly double Delta = 0.077; 12: private readonly double Gamma = 1.0; 13:  14: public Person() 15: { 16: Alpha = "FDSA"; 17: Beta = 2; 18: Delta = 3.0; 19: Gamma = 0.0989; 20: } 21:  22: public Person(int uniqueNumber) : this() 23: { 24: UniqueNumber = uniqueNumber; 25: Beta = 3; 26: } 27:  28: public Person(string name, DateTime dob) : this() 29: { 30: Name = name; 31: DateOfBirth = dob; 32:  33: Alpha = ";LKJ"; 34: Gamma = 0.0898; 35: } 36:  37: public Person(int uniqueNumber, string name, int age, DateTime dob, string invoiceNumber) : this() 38: { 39: UniqueNumber = uniqueNumber; 40: Name = name; 41: Age = age; 42: DateOfBirth = dob; 43: InvoiceNumber = invoiceNumber; 44:  45: Alpha = "QWER"; 46: Beta = 5; 47: Delta = 1.0; 48: Gamma = 0.0; 49: } 50: } In the above example, every constructor over-writes the values for the readonly members. This is perfectly valid. There is a possibility that based on the way the object is instantiated, the readonly member will have a different value. Well, that’s all I have for today and read this as it’s on a related topic.

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  • Configure EnableTransaction and IsolationLevel property in Business Rules for Dynamic Send Port

    - by Vishal
    Why do you want to add these properties to the BRE..??                 There is a lot of performance issue when using WCF adapters with Dynamic Send Port. Please check the below link for more info.   http://blogs.msdn.com/mdoctor/archive/2009/12/18/performance-tip-when-using-wcf-custom-with-dynamic-send-ports-and-custom-bindings-on-biztalk-server-2009.aspx?CommentPosted=true#commentmessage     So if you are using ESB Toolkit 2.0 in your solution and you do not want to move towards static adapte then you can add the below line in your SetEndpointConfig value for BRE.                 BindingType=xyzAdapterBinding&EnableTransaction=true&IsolationLevel=ReadCommited&BindingConfiguration=<bindingname=”xyzAdapterBinding" />   The IsolationLevel values can be: Serializable RepeatableRead ReadCommited ReadUncommited Snapshot Chaos   Below are few Business Rules Composer Screenshots.

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  • VS 2010 Debugger Improvements (BreakPoints, DataTips, Import/Export)

    - by ScottGu
    This is the twenty-first in a series of blog posts I’m doing on the VS 2010 and .NET 4 release.  Today’s blog post covers a few of the nice usability improvements coming with the VS 2010 debugger.  The VS 2010 debugger has a ton of great new capabilities.  Features like Intellitrace (aka historical debugging), the new parallel/multithreaded debugging capabilities, and dump debuging support typically get a ton of (well deserved) buzz and attention when people talk about the debugging improvements with this release.  I’ll be doing blog posts in the future that demonstrate how to take advantage of them as well.  With today’s post, though, I thought I’d start off by covering a few small, but nice, debugger usability improvements that were also included with the VS 2010 release, and which I think you’ll find useful. Breakpoint Labels VS 2010 includes new support for better managing debugger breakpoints.  One particularly useful feature is called “Breakpoint Labels” – it enables much better grouping and filtering of breakpoints within a project or across a solution.  With previous releases of Visual Studio you had to manage each debugger breakpoint as a separate item. Managing each breakpoint separately can be a pain with large projects and for cases when you want to maintain “logical groups” of breakpoints that you turn on/off depending on what you are debugging.  Using the new VS 2010 “breakpoint labeling” feature you can now name these “groups” of breakpoints and manage them as a unit. Grouping Multiple Breakpoints Together using a Label Below is a screen-shot of the breakpoints window within Visual Studio 2010.  This lists all of the breakpoints defined within my solution (which in this case is the ASP.NET MVC 2 code base): The first and last breakpoint in the list above breaks into the debugger when a Controller instance is created or released by the ASP.NET MVC Framework. Using VS 2010, I can now select these two breakpoints, right-click, and then select the new “Edit labels…” menu command to give them a common label/name (making them easier to find and manage): Below is the dialog that appears when I select the “Edit labels” command.  We can use it to create a new string label for our breakpoints or select an existing one we have already defined.  In this case we’ll create a new label called “Lifetime Management” to describe what these two breakpoints cover: When we press the OK button our two selected breakpoints will be grouped under the newly created “Lifetime Management” label: Filtering/Sorting Breakpoints by Label We can use the “Search” combobox to quickly filter/sort breakpoints by label.  Below we are only showing those breakpoints with the “Lifetime Management” label: Toggling Breakpoints On/Off by Label We can also toggle sets of breakpoints on/off by label group.  We can simply filter by the label group, do a Ctrl-A to select all the breakpoints, and then enable/disable all of them with a single click: Importing/Exporting Breakpoints VS 2010 now supports importing/exporting breakpoints to XML files – which you can then pass off to another developer, attach to a bug report, or simply re-load later.  To export only a subset of breakpoints, you can filter by a particular label and then click the “Export breakpoint” button in the Breakpoints window: Above I’ve filtered my breakpoint list to only export two particular breakpoints (specific to a bug that I’m chasing down).  I can export these breakpoints to an XML file and then attach it to a bug report or email – which will enable another developer to easily setup the debugger in the correct state to investigate it on a separate machine.  Pinned DataTips Visual Studio 2010 also includes some nice new “DataTip pinning” features that enable you to better see and track variable and expression values when in the debugger.  Simply hover over a variable or expression within the debugger to expose its DataTip (which is a tooltip that displays its value)  – and then click the new “pin” button on it to make the DataTip always visible: You can “pin” any number of DataTips you want onto the screen.  In addition to pinning top-level variables, you can also drill into the sub-properties on variables and pin them as well.  Below I’ve “pinned” three variables: “category”, “Request.RawUrl” and “Request.LogonUserIdentity.Name”.  Note that these last two variable are sub-properties of the “Request” object.   Associating Comments with Pinned DataTips Hovering over a pinned DataTip exposes some additional UI within the debugger: Clicking the comment button at the bottom of this UI expands the DataTip - and allows you to optionally add a comment with it: This makes it really easy to attach and track debugging notes: Pinned DataTips are usable across both Debug Sessions and Visual Studio Sessions Pinned DataTips can be used across multiple debugger sessions.  This means that if you stop the debugger, make a code change, and then recompile and start a new debug session - any pinned DataTips will still be there, along with any comments you associate with them.  Pinned DataTips can also be used across multiple Visual Studio sessions.  This means that if you close your project, shutdown Visual Studio, and then later open the project up again – any pinned DataTips will still be there, along with any comments you associate with them. See the Value from Last Debug Session (Great Code Editor Feature) How many times have you ever stopped the debugger only to go back to your code and say: $#@! – what was the value of that variable again??? One of the nice things about pinned DataTips is that they keep track of their “last value from debug session” – and you can look these values up within the VB/C# code editor even when the debugger is no longer running.  DataTips are by default hidden when you are in the code editor and the debugger isn’t running.  On the left-hand margin of the code editor, though, you’ll find a push-pin for each pinned DataTip that you’ve previously setup: Hovering your mouse over a pinned DataTip will cause it to display on the screen.  Below you can see what happens when I hover over the first pin in the editor - it displays our debug session’s last values for the “Request” object DataTip along with the comment we associated with them: This makes it much easier to keep track of state and conditions as you toggle between code editing mode and debugging mode on your projects. Importing/Exporting Pinned DataTips As I mentioned earlier in this post, pinned DataTips are by default saved across Visual Studio sessions (you don’t need to do anything to enable this). VS 2010 also now supports importing/exporting pinned DataTips to XML files – which you can then pass off to other developers, attach to a bug report, or simply re-load later. Combined with the new support for importing/exporting breakpoints, this makes it much easier for multiple developers to share debugger configurations and collaborate across debug sessions. Summary Visual Studio 2010 includes a bunch of great new debugger features – both big and small.  Today’s post shared some of the nice debugger usability improvements. All of the features above are supported with the Visual Studio 2010 Professional edition (the Pinned DataTip features are also supported in the free Visual Studio 2010 Express Editions)  I’ll be covering some of the “big big” new debugging features like Intellitrace, parallel/multithreaded debugging, and dump file analysis in future blog posts.  Hope this helps, 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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  • Jailbroken iPad 3G Is Capable of Sending SMS Text Messages

    - by Gopinath
    Wow! the iPhone Dev Team guys are crazy hackers, they don’t leave any iPhone/iPad OS without jail breaking it. Today the iPhone Dev team cracked the operating system of  iPad 3G and managed to send SMS from it using command line terminal interface. Here is the video demonstration of iPad 3G sending SMS Even though there is no user interface for sending SMS, this is a great achievement for the iPad jail breaking community. So what is next to come on iPad? Phone calls! Join us on Facebook to read all our stories right inside your Facebook news feed.

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  • New Shell In Oracle Solaris 11

    - by rickramsey
    In Oracle Solaris 11, Korn Shell 93 (/usr/bin/ksh/ or usr/bin/ksh93) replaces both the Bourne Shell (/usr/bin/sh or /sbin/sh) and Korn Shell 88 (/usr/bin/ksh). There are some incompatibilities between the shells. They are described in: /usr/share/doc/ksh/COMPATIBILITY If a script has compatibility problems you can use the legacy shell by changing the she-bang line: If this doesn't work Use This #!/bin/ksh #!/usr/sunos/bin/ksh #!/usr/bin/ksh #!/usr/sunos/bin/ksh     #!/bin/sh #!/usr/sunos/bin/sh #!/usr/bin/sh #!/usr/sunos/bin/sh #!/sbin/sh #!/usr/sunos/bin/sh - Mike Gerdts http://blogs.oracle.com/zoneszone/ Website Newsletter Facebook Twitter

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  • Lync Server 2010

    - by ManojDhobale
    Microsoft Lync Server 2010 communications software and its client software, such as Microsoft Lync 2010, enable your users to connect in new ways and to stay connected, regardless of their physical location. Lync 2010 and Lync Server 2010 bring together the different ways that people communicate in a single client interface, are deployed as a unified platform, and are administered through a single management infrastructure. Workload Description IM and presence Instant messaging (IM) and presence help your users find and communicate with one another efficiently and effectively. IM provides an instant messaging platform with conversation history, and supports public IM connectivity with users of public IM networks such as MSN/Windows Live, Yahoo!, and AOL. Presence establishes and displays a user’s personal availability and willingness to communicate through the use of common states such as Available or Busy. This rich presence information enables other users to immediately make effective communication choices. Conferencing Lync Server includes support for IM conferencing, audio conferencing, web conferencing, video conferencing, and application sharing, for both scheduled and impromptu meetings. All these meeting types are supported with a single client. Lync Server also supports dial-in conferencing so that users of public switched telephone network (PSTN) phones can participate in the audio portion of conferences. Conferences can seamlessly change and grow in real time. For example, a single conference can start as just instant messages between a few users, and escalate to an audio conference with desktop sharing and a larger audience instantly, easily, and without interrupting the conversation flow. Enterprise Voice Enterprise Voice is the Voice over Internet Protocol (VoIP) offering in Lync Server 2010. It delivers a voice option to enhance or replace traditional private branch exchange (PBX) systems. In addition to the complete telephony capabilities of an IP PBX, Enterprise Voice is integrated with rich presence, IM, collaboration, and meetings. Features such as call answer, hold, resume, transfer, forward and divert are supported directly, while personalized speed dialing keys are replaced by Contacts lists, and automatic intercom is replaced with IM. Enterprise Voice supports high availability through call admission control (CAC), branch office survivability, and extended options for data resiliency. Support for remote users You can provide full Lync Server functionality for users who are currently outside your organization’s firewalls by deploying servers called Edge Servers to provide a connection for these remote users. These remote users can connect to conferences by using a personal computer with Lync 2010 installed, the phone, or a web interface. Deploying Edge Servers also enables you to federate with partner or vendor organizations. A federated relationship enables your users to put federated users on their Contacts lists, exchange presence information and instant messages with these users, and invite them to audio calls, video calls, and conferences. Integration with other products Lync Server integrates with several other products to provide additional benefits to your users and administrators. Meeting tools are integrated into Outlook 2010 to enable organizers to schedule a meeting or start an impromptu conference with a single click and make it just as easy for attendees to join. Presence information is integrated into Outlook 2010 and SharePoint 2010. Exchange Unified Messaging (UM) provides several integration features. Users can see if they have new voice mail within Lync 2010. They can click a play button in the Outlook message to hear the audio voice mail, or view a transcription of the voice mail in the notification message. Simple deployment To help you plan and deploy your servers and clients, Lync Server provides the Microsoft Lync Server 2010, Planning Tool and the Topology Builder. Lync Server 2010, Planning Tool is a wizard that interactively asks you a series of questions about your organization, the Lync Server features you want to enable, and your capacity planning needs. Then, it creates a recommended deployment topology based on your answers, and produces several forms of output to aid your planning and installation. Topology Builder is an installation component of Lync Server 2010. You use Topology Builder to create, adjust and publish your planned topology. It also validates your topology before you begin server installations. When you install Lync Server on individual servers, the installation program deploys the server as directed in the topology. Simple management After you deploy Lync Server, it offers the following powerful and streamlined management tools: Active Directory for its user information, which eliminates the need for separate user and policy databases. Microsoft Lync Server 2010 Control Panel, a new web-based graphical user interface for administrators. With this web-based UI, Lync Server administrators can manage their systems from anywhere on the corporate network, without needing specialized management software installed on their computers. Lync Server Management Shell command-line management tool, which is based on the Windows PowerShell command-line interface. It provides a rich command set for administration of all aspects of the product, and enables Lync Server administrators to automate repetitive tasks using a familiar tool. While the IM and presence features are automatically installed in every Lync Server deployment, you can choose whether to deploy conferencing, Enterprise Voice, and remote user access, to tailor your deployment to your organization’s needs.

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  • Integrating Code Metrics in TFS 2010 Build

    - by Jakob Ehn
    The build process template and custom activity described in this post is available here: http://cid-ee034c9f620cd58d.office.live.com/self.aspx/BlogSamples/CodeMetricsSample.zip Running code metrics has been available since VS 2008, but only from inside the IDE. Yesterday Microsoft finally releases a Visual Studio Code Metrics Power Tool 10.0, a command line tool that lets you run code metrics on your applications.  This means that it is now possible to perform code metrics analysis on the build server as part of your nightly/QA builds (for example). In this post I will show how you can run the metrics command line tool, and also a custom activity that reads the output and appends the results to the build log, and also fails he build if the metric values exceeds certain (configurable) treshold values. The code metrics tool analyzes all the methods in the assemblies, measuring cyclomatic complexity, class coupling, depth of inheritance and lines of code. Then it calculates a Maintainability Index from these values that is a measure f how maintanable this method is, between 0 (worst) and 100 (best). For information on hwo this value is calculated, see http://blogs.msdn.com/b/codeanalysis/archive/2007/11/20/maintainability-index-range-and-meaning.aspx. After this it aggregates the information and present it at the class, namespace and module level as well. Running Metrics.exe in a build definition Running the actual tool is easy, just use a InvokeProcess activity last in the Compile the Project sequence, reference the metrics.exe file and pass the correct arguments and you will end up with a result XML file in the drop directory. Here is how it is done in the attached build process template: In the above sequence I first assign the path to the code metrics result file ([BinariesDirectory]\result.xml) to a variable called MetricsResultFile, which is then sent to the InvokeProcess activity in the Arguments property. Here are the arguments for the InvokeProcess activity: Note that we tell metrics.exe to analyze all assemblies located in the Binaries folder. You might want to do some more intelligent filtering here, you probably don’t want to analyze all 3rd party assemblies for example. Note also the path to the metrics.exe, this is the default location when you install the Code Metrics power tool. You must of course install the power tool on all build servers. Using the standard output logging (in the Handle Standard Output/Handle Error Output sections), we get the following output when running the build: Integrating Code Metrics into the build Having the results available next to the build result is nice, but we want to have results integrated in the build result itself, and also to affect the outcome of the build. The point of having QA builds that measure, for example, code metrics is to make it very clear how the code being built measures up to the standards of the project/company. Just having a XML file available in the drop location will not cause the developers to improve their code, but a (partially) failing build will! To do this, we need to write a custom activity that parses the metrics result file, logs it to the build log and fails the build if the values frfom the metrics is below/above some predefined treshold values. The custom activity performs the following steps Parses the XML. I’m using Linq 2 XSD for this, since the XML schema for the result file is available, it is vey easy to generate code that lets you query the structure using standard Linq operators. Runs through the metric result hierarchy and logs the metrics for each level and also verifies maintainability index and the cyclomatic complexity with the treshold values. The treshold values are defined in the build process template are are sent in as arguments to the custom activity If the treshold values are exceeded, the activity either fails or partially fails the current build. For more information about the structure of the code metrics result file, read Cameron Skinner's post about it. It is very simpe and easy to understand. I won’t go through the code of the custom activity here, since there is nothing special about it and it is available for download so you can look at it and play with it yourself. The treshold values for Maintainability Index and Cyclomatic Complexity is defined in the build process template, and can be modified per build definition: I have taken the default value for these settings from my colleague Terje Sandström post on Code Metrics - suggestions for approriate limits. You’ll notice that this is quite an improvement compared to using code metrics inside the IDE, where Red/Yellow/Green limits are fixed (and the default values are somewaht strange, see Terjes post for a discussion on this) This is the first version of the code metrics integration with TFS 2010 Build, I will proabably enhance the functionality and the logging (the “tree view” structure in the log becomes quite hard to read) soon. I will also consider adding it to the Community TFS Build Extensions site when it becomes a bit more mature. Another obvious improvement is to extend the data warehouse of TFS and push the metric results back to the warehouse and make it visible in the reports.

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  • AZGroups May 10 2010 Day of Net

    WOW. Another event behind us. What a speaker line up this year huh? Scott Guthrie Scott Guthrie Scott Hanselman Jeffrey Palermo Tim Heuer Scott Guthrie Why is ScottGu listed 3 times? Because he gave us 4 hours of content. Amazing that hes got so much energy, coding talent, stage presence, and community concern to still donate this much of this time. I cant say how grateful we are as a community that ScottGu will agrees to come do our event. We also have to take a moment and...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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