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  • Interview with Java Champion Matjaz B. Juric on Cloud Computing, SOA, and Java EE 6

    - by [email protected]
    In a Java Champion interview Matjaz Juric of Slovenia, head of the Cloud Computing and SOA Competence Centre at the University of Maribor, and professor at the University of Ljubljana, shares insights about cloud computing, SOA and Java EE 6. Juric has worked on performance analysis and optimization of RMI-IIOP, as well as being a member of the BPEL Advisory Board, and a Java mentor and trainer.Regarding BPEL he remarks, "Probably the most important thing to understand is what should be programmed in Java and what should be programmed in BPEL. There is still some confusion. BPEL is for the process logic, while Java is for functionalities. Together, BPEL and Java form a strong alliance and enable faster development and maintenance of enterprise applications and their integrations. On the other hand, the integration between Java and BPEL could be improved. There have been different approaches, including Java snippets. I would like to see an XML data type in Java, without all the hassles with JAXB, mappings, or DOM." Read the rest of the article here.

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  • How to efficiently handle Where and OrderBy clauses

    - by Goran
    My business layer passes all the required information to UI layer. From what I have read, in general, best practice is to send fetched data to UI layer, and to avoid passing queries like ObjectQuery. My problem with this approach is next: If I am to make a flexible business layer, then I should allow UI to sort the data anyway it requires. Fetching sorted data from database, and then resorting them in UI is kind of bad practice for me, so the only way is to somehow So what are my options? Is there a way to make it like this: public void OrderByMethod(params ...) { .... } so I can call it like this: OrderByMethod(MyEntity.Property1, MyEntity.Property2 descending....); Thanks, Goran

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  • Direct2d off-screen rendering and hardware acceleration

    - by Goran
    I'm trying to use direct2d to render images off-screen using WindowsAPICodePack. This is easily achieved using WicBitmapRenderTarget but sadly it's not hardware accelerated. So I'm trying this route: Create direct3d device Create texture2d Use texture surface to create render target using CreateDxgiSurfaceRenderTarget Draw some shapes While this renders the image it appears GPU isn't being used at all while CPU is used heavily. Am I doing something wrong? Is there a way to check whether hardware or software rendering is used? Code sample: var device = D3DDevice1.CreateDevice1( null, DriverType.Hardware, null, CreateDeviceOptions.SupportBgra ,FeatureLevel.Ten ); var txd = new Texture2DDescription(); txd.Width = 256; txd.Height = 256; txd.MipLevels = 1; txd.ArraySize = 1; txd.Format = Format.B8G8R8A8UNorm; //DXGI_FORMAT_R32G32B32A32_FLOAT; txd.SampleDescription = new SampleDescription(1,0); txd.Usage = Usage.Default; txd.BindingOptions = BindingOptions.RenderTarget | BindingOptions.ShaderResource; txd.MiscellaneousResourceOptions = MiscellaneousResourceOptions.None; txd.CpuAccessOptions = CpuAccessOptions.None; var tx = device.CreateTexture2D(txd); var srfc = tx.GraphicsSurface; var d2dFactory = D2DFactory.CreateFactory(); var renderTargetProperties = new RenderTargetProperties { PixelFormat = new PixelFormat(Format.Unknown, AlphaMode.Premultiplied), DpiX = 96, DpiY = 96, RenderTargetType = RenderTargetType.Default, }; using(var renderTarget = d2dFactory.CreateGraphicsSurfaceRenderTarget(srfc, renderTargetProperties)) { renderTarget.BeginDraw(); var clearColor = new ColorF(1f,1f,1f,1f); renderTarget.Clear(clearColor); using (var strokeBrush = renderTarget.CreateSolidColorBrush(new ColorF(0.2f,0.2f,0.2f,1f))) { for (var i = 0; i < 100000; i++) { renderTarget.DrawEllipse(new Ellipse(new Point2F(i, i), 10, 10), strokeBrush, 2); } } var hr = renderTarget.EndDraw(); }

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  • Window Focus in Scale (Compiz)

    - by Göran
    This is a follow-up question to Expose (OSX Style) Functionality in Unity. I'm having issues with focus. With the help of Compiz Config I have succesfully activated a window picker similar to the one named exposé in Mac OS X (but with more options!). However when I use this function the window I click on/choose is not automatically focused. How can I fix this or is this a bug within Compiz/Scale?

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  • Doctrine inserts when it should update

    - by Goran Juric
    I am trying to use do the most simple update query but Doctrine issues an INSERT statement instead of an UPDATE. $q = Doctrine_Query::create() ->from('Image i') ->where('id = ?'); $image = $q->fetchOne($articleId, Doctrine_Core::HYDRATE_RECORD); $image->copyright = "some text"; $image->save(); I have also tried using the example from the manual, but still a new record gets inserted: $userTable = Doctrine_Core::getTable('User'); $user = $userTable->find(2); if ($user !== false) { $user->username = 'Jack Daniels'; $user->save(); } edit: This example from the manual works: $user = new User(); $user->assignIdentifier(1); $user->username = 'jwage'; $user->save(); The funny thing is that I use this on another model and there it works OK. Maybe I have to fetch the whole array graph for this to work (I have another model in a one to many relationship)?

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  • 'The RPC server is unavailable' when converting a physical ISA/Forefront TMG machine to virtual (P2V) in SCVMM

    - by Goran B.
    When I try to convert a physical ISA/TMG machine to virtual using SCVMM, i keep getting an error in the Collect machine configuration step ('Scan Now' button): VMM is unable to complete the request. The connection to the agent MACHINE_NAME was lost. Ensure that the computer MACHINE_NAME exists on the network, WMI service and the agent are installed and running and that a firewall is not blocking HTTP and WMI traffic. ID: 3157 Details: The RPC server is unavailable (0x800706BA) Firewall rules allow for RPC traffic from the SCVMM machine to ISA/TMG machine.

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  • Understanding mail failure notices, 554

    - by goran
    I'd like to confirm the meaining of a mail failure notice. Here's the message Hi. This is the qmail-send program at mydomain.com I'm afraid I wasn't able to deliver your message to the following addresses. This is a permanent error; I've given up. Sorry it didn't work out. <[email protected]>: 1.2.3.4 does not like recipient. Remote host said: 554 <[email protected]>: Relay access denied Giving up on 1.2.3.4 The way I understand this is, that 1.2.3.4 is not setup to receive mail for this domain. dig domain.com MX shows ;; ANSWER SECTION: domain.com. 6245 IN MX 10 mail.domain.com. domain.com. 6245 IN MX 20 mx.anotherdomain.com. (1.2.3.4 is mx.anotherdomain.com.). The puzzling part is that I have reports that messages sent from gmail get delivered to this address. P.S. Is this a proper question for serverfault?

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  • E-mail spam analyzing tools

    - by goran
    I have some mail logs, for which I assume that come from our hosted mail server antivirus: 1, antispam: 1, sanesecurity: 1, chkuser: 1, chkrbl: 1, chkmx: 1, chkptr: 0, greylistlevel: 0, rejectemptyfrom: 1, spamscore: 7.00, redirectspam: 1, maxrcpt: 30, maxdatabytes: 50000000, nightguard: 0, whitelistsigned: 1 (+ info on each message score) as plain text files. I was wondering if anyone knows which tool produce such logs and if there are any tools that would parse and analyze the logs?

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  • Running PHP 5.2 FastCGI + Apache on CentOS 5 issue

    - by Goran
    I am trying to setup 2 versions of PHP on Centos 5.9 using this tutorial: http://linuxplayer.org/2011/05/intall-multiple-version-of-php-on-one-server. I have followed I have installed default 5.4.19, and I was trying to setup another 5.2.17 PHP version to be run with Fast CGI and I followed the second part completely. However, when I try to run http://web2.example.com it returns 500 error message. In the apache log there are only 2 lines that repeat: [notice] mod_fcgid: call /var/www/web2/index.php with wrapper /usr/local/php52/bin/fcgiwrapper.sh and [notice] mod_fcgid: process /var/www/web2/index.php(25250) exit(server exited), terminated by calling exit(), return code: 255 Please note that I had to add .php at the and of the FCGIWrapper because apache would not start without it: FCGIWrapper /usr/local/php52/bin/fcgiwrapper.sh .php Also please note that http://web1.example.com with PHP 5.4.19 is working absolutely fine. Please help. Thank you very much in advance.

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  • How to check that image sizes are ok or not

    - by Goran
    I am having many image files in one folder. Mostly there are jpg, but some png, bmp, gif, tif also (but jpg is most important if others are not possible). There are also many xml files in same folder with same names as image files are having. So there is something like this: 1.jpg, 1.xml, a.png, a.xml, 3g.bmp, 3g.xml... All xml files are having only 1 line: <IMGRES WIDTH="1234" HEIGHT="567" /> (of course numbers are not same). I am looking for some easy way to check all image sizes and confirm if they are same as in xml or not. So I want output like: imagename, xmlwidth x xmlheight, realwidth x realheight, match/error Is this possible in only Windows with no other software installed?

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  • Web Applications under Apache Tomcat with multiple directory contexts

    - by goran
    I have two webapps, prod-1.2.1.war and test-2.0.0.war. If I put these straight into the "tomcat/webapps"-folder, they'll get deployed as; hXXp://localhost/prod-1.2.1/ hXXp://localhost/test-2.0.0/ This works but really I would like them to show up as; hXXp://localhost/vegshop/prod/ hXXp://localhost/vegshop/test/ As you see I somehow would like the "vegshop" to be included in the context path. I also would like the version-numbering to disappear without having to rename the WAR-files. Thank you. This is Apache Tomcat v6.0 under Linux 2.6, running SUN JDK 1.6.

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  • Different graphic cards drivers while booting from external media

    - by goran
    I am booting a certain system of mine with ubuntu 9.10 from external HDD. I am satisfied with the setup and it works fine, however I would like to modify it so that I can choose which graphic card drivers to load during the boot time. Specifically I would like to choose between: nvidia proprietary driver ati proprietary driver generic driver Currently if I am using proprietary drivers then dont boot into X, delete xorg.conf, start gdm and reconfigure the system using jockey (for hardware drivers). What would be the steps to make this (semi-)automatic and avoid restarting X?

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  • VS 2012 / 2013 AccessViolationException

    - by Goran
    When I run the project (F5) I receive the following exception in IDE: An unhandled exception of type 'System.AccessViolationException' occurred in System.Windows.Forms.dll Additional information: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. Stack trace reports at System.Windows.Forms.UnsafeNativeMethods.SendMessage(HandleRef hWnd, Int32 msg, IntPtr wParam, IntPtr lParam) at System.Windows.Forms.Control.SendMessage(Int32 msg, Int32 wparam, IntPtr lparam) at System.Windows.Forms.Form.UpdateWindowIcon(Boolean redrawFrame) at System.Windows.Forms.Form.CreateHandle() at System.Windows.Forms.Control.get_Handle() at Microsoft.VisualStudio.HostingProcess.HostProc.RunParkingWindowThread() at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart() I have never noticed receiving the same exception when running without debugger (CTRL+F5). This is a WPF project, but exception occurs before the App_ctor is executed, so this is external code, and my application code did not start to execute. This happens sporadically, sometimes it happens only once, and sometimes I run the project and get this message for several times in a roll. Then it does not pop up for 5-6 runs, and then starts again. Anyone knows why is this happening? I have just installed clean W8.1 64 bit, VS2013 and TFS 2013 (although I had the same problem with W8 and VS2012, but not as often).

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  • Smooth text animation (Marquee) using WPF

    - by Goran
    Trying to build a marquee control with smooth text animation. Current efforts include: Using translate transform Using animation on Canvas dependency properties (Left, Right) Using animation on custom dependency property (Point) and using drawing visuals (formattedtext) Using CompositionTarget.Rendering But the animation is still choppy and resource intensive. Checklist: Confirmed no software rendering is taking place (ms performance tool and checking RenderCapability.Tier) Calling freeze on any imaginable object Running app on dual core machine with decent graphic card (NVidia 9600) Disabled any bitmap effect and transparency Checked all marquee controls out there (same issues) Any ideas (or better yet code example)?

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  • How does mysql define DISTINCT() in reference documentation

    - by goran
    EDIT: This question is about finding definitive reference to MySQL syntax on SELECT modifying keywords and functions. /EDIT AFAIK SQL defines two uses of DISTINCT keywords - SELECT DISTINCT field... and SELECT COUNT(DISTINCT field) ... However in one of web applications that I administer I've noticed performance issues on queries like SELECT DISTINCT(field1), field2, field3 ... DISTINCT() on a single column makes no sense and I am almost sure it is interpreted as SELECT DISTINCT field1, field2, field3 ... but how can I prove this? I've searched mysql site for a reference on this particular syntax, but could not find any. Does anyone have a link to definition of DISTINCT() in mysql or knows about other authoritative source on this? Best EDIT After asking the same question on mysql forums I learned that while parsing the SQL mysql does not care about whitespace between functions and column names (but I am still missing a reference). As it seems you can have whitespace between functions and the parenthesis SELECT LEFT (field1,1), field2... and get mysql to understand it as SELECT LEFT(field,1) Similarly SELECT DISTINCT(field1), field2... seems to get decomposed to SELECT DISTINCT (field1), field2... and then DISTINCT is taken not as some undefined (or undocumented) function, but as SELECT modifying keyword and the parenthesis around field1 are evaluated as if they were part of field expression. It would be great if someone would have a pointer to documentation where it is stated that the whitespace between functions and parenthesis is not significant or to provide links to apropriate MySQL forums, mailing lists where I could raise a question to put this into reference. EDIT I have found a reference to server option IGNORE SPACE. It states that "The IGNORE SPACE SQL mode can be used to modify how the parser treats function names that are whitespace-sensitive", later on it states that recent versions of mysql have reduced this number from 200 to 30. One of the remaining 30 is COUNT for example. With IGNORE SPACE enabled both SELECT COUNT(*) FROM mytable; SELECT COUNT (*) FROM mytable; are legal. So if this is an exception, I am left to conclude that normally functions ignore space by default. If functions ignore space by default then if the context is ambiguous, such as for the first function on a first item of the select expression, then they are not distinguishable from keywords and the error can not be thrown and MySQL must accept them as keywords. Still, my conclusions feel like they have lot of assumptions, I would still be grateful and accept any pointers to see where to follow up on this.

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  • How to create custom asp.net validator that works with UpdatePanel?

    - by Goran
    I think that subject summs it pretty well... I have created my custom validators that work great when I put them on page in design mode. However if I place them in a usercontrol, and then try to add this user control to the parent page via updatepanel, then my custom validators just won't trigger. They simply don't work. Does anyone have any clue on what I have to do here? .net 3.5

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  • load/unload C dll with C# problems

    - by Goran
    I'm having problems with external native DLL. I'm working on ASP.NET 1.1 web application and have this DLL which I load through DLLImport directives. This is how I map DLL functions: [DllImport("somedllname", CallingConvention=CallingConvention.StdCall)] public static extern int function1(string lpFileName,string lpOwnerPw,string lpUserPw); [DllImport("somedllname", CallingConvention=CallingConvention.StdCall)] public static extern int function2(int nHandle); I call the dll methods and all works great, but I have problems with this DLL crashing my web site on some cases, so I would like an option to unload the dll after I use it. I found a solution at this link, but I don't have 'UnmanagedFunctionPointer' attribute in .NET 1.1 available. http://blogs.msdn.com/jonathanswift/archive/2006/10/03/Dynamically-calling-an-unmanaged-dll-from-.NET-_2800_C_23002900_.aspx Is there a way I can achieve what this guy did with his example?

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  • Sending a file over web service from java to .net

    - by Goran
    Hello, I have built .NET 1.1 Web Service which should accept files and save them. Here is the code of the webmethod: [WebMethod] public bool SaveDocument(Byte[] docbinaryarray, string docname) { string dirPath = @"C:\Temp\WSTEST\"; if(!Directory.Exists(dirPath)) { Directory.CreateDirectory(dirPath); } string filePath = dirPath + docname; FileStream objfilestream = new FileStream(filePath, FileMode.Create, FileAccess.ReadWrite); objfilestream.Write(docbinaryarray, 0, docbinaryarray.Length); objfilestream.Close(); return true; } When I make a client in .NET with reference to this Web service everything goes great, but when a college of mine tries to send me a file from a JAVA client I don't get the actuall file. All I get is byte array with only one element. Definition of byte array for file, in WSDL looks like this: <s:element minOccurs="0" maxOccurs="1" name="docbinaryarray" type="s:base64Binary" /> He sends me base64binary and fails every time. All I get is Byte array with only one element inside.

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  • How does mysql define DISTINCT()

    - by goran
    AFAIK SQL defines two uses of DISTINCT keywords - SELECT DISTINCT field... and SELECT COUNT(DISTINCT field) ... However in one of web applications that I administer I've noticed performance issues on queries like SELECT DISTINCT(field1), field2, field3 ... DISTINCT() on a single column makes no sense and I am almost sure it is interpreted as SELECT DISTINCT field1, field2, field3 ... but how can I prove this? I've searched mysql site for a reference on this particular syntax but could not find any. Does anyone have a link to definition of DISTINCT() in mysql or knows about other authoritative source on this? Best

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  • ui:include disables menu

    - by Goran B
    <rich:tab id="profileInfoTab" label="Information" labelWidth="80"> <ui:include src="/panels/tab2.jsp" /> </rich:tab> <rich:tab id="profileReferenceTab" label="Referenser" labelWidth="80"> <ui:include src="/panels/tab3.jsp" /> </rich:tab> If I include all code in /panel/tab1.jsp instead of the ui:include everything is OK. If I use the ui:include nothing is rendered. Not even the tab-panel. Why? Workarounds?

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  • Wordpress - Plugin - Administration - ?

    - by Goran
    Hi, I'm building a Wordpress plugin and I added a menu page which serves for management of "Vendor" entities that are kinda similar to the existing User entities. I have a list page similar to Users List, with Edit button for every record and when I click on the "Edit" button I should be taken to the "Edit Vendor" (which does not have its submenu item in the admin menu) page for that vendor. Everything is stored in the "plugins/wp_vendors" folder. Question: What URL should I use for opening that Edit page? How should a slug be registered for the Edit Vendor page? PS. Vendor List is added to the admin menu with add_menu_page('Vendors', 'Vendors', 8, 'C:\wordpress\wp-content\plugins\wp-vendors\vendors-list.php'); And I can open the List page with http://localhost/wp-admin/admin.php?page=wp-vendors/vendors-list.php Can anyone help me on this?

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  • Detaching all entities of T to get fresh data

    - by Goran
    Lets take an example where there are two type of entites loaded: Product and Category, Product.CategoryId - Category.Id. We have available CRUD operations on products (not Categories). If on another screen Categories are updated (or from another user in the network), we would like to be able to reload the Categories, while preserving the context we currently use, since we could be in the middle of editing data, and we do not want changes to be lost (and we cannot depend on saving, since we have incomplete data). Since there is no easy way to tell EF to get fresh data (added, removed and modified), we thought of twp possible ways: 1) Getting products attached to context, and categories detached from context. This would mean that we loose the ability to access Product.Category.Name, which we do sometimes require, so we would need to manually resolve it (example when printing data). 2) detaching / attaching all Categories from current context. Context.ChangeTracker.Entries().Where(x => x.Entity.GetType() == typeof(T)).ForEach(x => x.State = EntityState.Detached); And then reload the categories, which will get fresh data. Do you find any problem with this second approach? We understand that this will require all constraints to be put on foreign keys, and not navigation properties, since when detaching all Categories, Product.Category navigation properties would be reset to null also. Also, there could be a potential performance problem, which we did not test, since there could be couple of thousand products loaded, and all would need to resolve navigation property when reloading. Which of the two do you prefer, and is there a better way (EF6 + .NET 4.0)?

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