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• Flex 3 Value aware combo box error

  - by user1057094

  I am using a value aware combobox, it was working fine, but recently i started getting the below error, when I try to click on combobox, and the error is random. I am not sure of it is because of any changes i have done in the coding, or some changes in data provider etc any help is appreciated... TypeError: Error #1009: Cannot access a property or method of a null object reference. at mx.controls::ComboBox/destroyDropdown() at mx.controls::ComboBox/styleChanged() at mx.core::UIComponent/setBorderColorForErrorString() at mx.core::UIComponent/commitProperties() at mx.controls::ComboBase/commitProperties() at mx.controls::ComboBox/commitProperties() at custom.controls::ComboBox/commitProperties()[D:\workspace\eclipse\indigo\ams\flex_src\custom\controls\ComboBox.mxml:13] at mx.core::UIComponent/validateProperties() at mx.managers::LayoutManager/validateProperties() at mx.managers::LayoutManager/doPhasedInstantiation() Debugger throws TypeError: Error #1009: Cannot access a property or method of a null object reference. at mx.controls::ComboBox/destroyDropdown() at mx.controls::ComboBox/styleChanged() at mx.core::UIComponent/setBorderColorForErrorString() at mx.core::UIComponent/commitProperties() at mx.controls::ComboBase/commitProperties() at mx.controls::ComboBox/commitProperties() at custom.controls::ComboBox/commitProperties()[D:\workspace\eclipse\indigo\ams\flex_src\custom\controls\ComboBox.mxml:13] at mx.core::UIComponent/validateProperties() at mx.managers::LayoutManager/validateProperties() at mx.managers::LayoutManager/doPhasedInstantiation() at mx.managers::LayoutManager/validateNow() at mx.controls::ComboBox/displayDropdown() at mx.controls::ComboBox/downArrowButton_buttonDownHandler() at flash.events::EventDispatcher/dispatchEventFunction() at flash.events::EventDispatcher/dispatchEvent() at mx.core::UIComponent/dispatchEvent() at mx.controls::Button/http://www.adobe.com/2006/flex/mx/internal::buttonPressed() at mx.controls::Button/mouseDownHandler() at flash.events::EventDispatcher/dispatchEventFunction() at flash.events::EventDispatcher/dispatchEvent() at mx.core::UIComponent/dispatchEvent() at mx.controls::ComboBase/textInput_mouseEventHandler()

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• Save HTML to Pdf ABCPdf 4

  - by daisy

  Hello All, I'm using following code to save html to pdf file. But it fails to compile at if (!theDoc.Chainable(theID)). I do have using WebSupergoo.ABCpdf4; added at the begining of the code. Is this version issue? Is there any other method to save HTML string to pdf file in ABCPdf 4. Error Message is "'WebSupergoo.ABCpdf4.Doc' does not contain a definition for 'Chainable' and no extension method 'Chainable' accepting a first argument of type 'WebSupergoo.ABCpdf4.Doc' could be found (are you missing a using directive or an assembly reference?) Doc theDoc = new Doc(); theDoc.Rect.Inset(10, 50); theDoc.Page = theDoc.AddPage(); int theID; theID = theDoc.AddImageHtml(str); while (true) { if (!theDoc.Chainable(theID)) break; theDoc.Page = theDoc.AddPage(); theID = theDoc.AddImageToChain(theID); } for (int i = 1; i <= theDoc.PageCount; i++) { theDoc.PageNumber = i; theDoc.Flatten(); } theDoc.Save("path where u want 2 save" + ".pdf"); theDoc.Clear(); All the help is appreciated.

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• Seperation of notification confirmation+storage and handling notification asp.net mvc

  - by bastijn

  After a payment from my web application to a 3rd party the 3rd party sends, next to the direct confirmation message, a notification message. This notification message is stored in my database for future use and I have to send a notification confirmed back. For this purpose I currently use a: return Content("received") Which is standard protocol for the service. Currently, I process the incoming notification by first storing it, than handling it (updating account credits etc in my application) and in the end sending a response. This all works well. But I want to seperate handling the notification and storing+responding to the webservice. The problem is that the "return Content()" is ending my controller method and therefore I cannot simply first send the confirmation message back to the webservice and than call my handle_Notification() method. So the solution would be to replace the return Content() part with something equal which doesn't involve a "return", is this possible, as I do not now the complete URL calling I cannot easily create a simple HTTP POST web request (I tried, might have made an error but did not work). Another solution would be to have some kind of timer or listener which either periodically checks for new notifications in the Database which have to be handled or a listener listening to DB new notifications or something. What is the standard procedure on this, if any?

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• How to Global onRouteRequest directly to onBadRequest?

  - by virtualeyes

  EDIT Came up with this to sanitize URI date params prior to passing off to Play router val ymdMatcher = "\\d{8}".r // matcher for yyyyMMdd URI param val ymdFormat = org.joda.time.format.DateTimeFormat.forPattern("yyyyMMdd") def ymd2Date(ymd: String) = ymdFormat.parseDateTime(ymd) override def onRouteRequest(r: RequestHeader): Option[Handler] = { import play.api.i18n.Messages ymdMatcher.findFirstIn(r.uri) map{ ymd=> try { ymd2Date( ymd); super.onRouteRequest(r) } catch { case e:Exception => // kick to "bad" action handler on invalid date Some(controllers.Application.bad(Messages("bad.date.format"))) } } getOrElse(super.onRouteRequest(r)) } ORIGINAL Let's say I want to return a BadRequest result type for all /foo URIs: override def onBadRequest(r: RequestHeader, error: String) = { BadRequest("Bad Request: " + error) } override def onRouteRequest(r: RequestHeader): Option[Handler] = { if(r.uri.startsWith("/foo") onBadRequest("go away") else super.onRouteRequest(r) } Of course does not work, since the expected return type is Option[play.api.mvc.Handler] What's the idiomatic way to deal with this, create a default Application controller method to handle filtered bad requests? Ideally, since I know in onRouteRequest that /foo is in fact a BadRequest, I'd like to call onBadRequest directly. Should note that this is a contrived example, am actually verifying a URI yyyyMMdd date param, and BadRequest-ing if it does not parse to a JodaTime instance -- basically a catch-all filter to sanitize a given date param rather than handling on every single controller method call, not to mention, avoiding cluttering up application log with useless stack traces re: invalid date parse conversions (have several MBs of these junk trace entries accruing daily due to users pointlessly manipulating the uri date in attempts to get at paid subscriber content)

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• How to dispose a Writeable Bitmap? (WPF)

  - by Mario

  Some time ago i posted a question related to a WriteableBitmap memory leak, and though I received wonderful tips related to the problem, I still think there is a serious bug / (mistake made by me) / (Confusion) / (some other thing) here. So, here is my problem again: Suppose we have a WPF application with an Image and a button. The image's source is a really big bitmap (3600 * 4800 px), when it's shown at runtime the applicaton consumes ~90 MB. Now suppose i wish to instantiate a WriteableBitmap from the source of the image (the really big Image), when this happens the applications consumes ~220 MB. Now comes the tricky part, when the modifications to the image (through the WriteableBitmap) end, and all the references to the WriteableBitmap (at least those that I'm aware of) are destroyed (at the end of a method or by setting them to null) the memory used by the writeableBitmap should be freed and the application consumption should return to ~90 MB. The problem is that sometimes it returns, sometimes it does not. Here is a sample code: // The Image's source whas set previous to this event private void buttonTest_Click(object sender, RoutedEventArgs e) { if (image.Source != null) { WriteableBitmap bitmap = new WriteableBitmap((BitmapSource)image.Source); bitmap.Lock(); bitmap.Unlock(); //image.Source = null; bitmap = null; } } As you can see the reference is local and the memory should be released at the end of the method (Or when the Garbage collector decides to do so). However, the app could consume ~224 MB until the end of the universe. Any help would be great.

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• Issue configuring Oracle database for SSL

  - by Santhosha

  Hello, I want to setup Oracle for SSL communication. I am not using SSL authentication for database user. As first requirement, generated self signed certificate using OpenSSL and added certificate to wallet. The wallet location is specified in server configuration. Created listener and it is starting however it does not provide any service. The default listener (non SSL) is working fine. When I execute LSNRCTL.EXE status SSLLISTENER it gives below output. STATUS of the LISTENER Alias SSLLISTENER Version TNSLSNR for 32-bit Windows: Version 11.1.0.6.0 - Production Start Date 14-NOV-2009 01:47:08 Uptime 16 days 22 hr. 14 min. 3 sec Trace Level off Security ON: Local OS Authentication SNMP OFF Listener Parameter File C:\app\Administrator\product\11.1.0\db_1\network\admin\listener.ora Listener Log File c:\app\administrator\diag\tnslsnr\\ssllistener\alert\log.xml Listening Endpoints Summary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=)(PORT =2484))) The listener supports no services The command completed successfully Here is exact content of various files after configuration. 1) File Name: tnsnames.ora ORCL = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = )(PORT 1521)) ) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = orcl) ) ) 2) File Name: sqlnet.ora SSL_VERSION = 0 NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT) sqlnet.authentication_services= (NONE) tcp.validnode_checking = no tcp.invited_nodes=(PS0803.oraebs.com,PS2948,PS5098) SSL_CLIENT_AUTHENTICATION = FALSE WALLET_LOCATION = (SOURCE = (METHOD = FILE) (METHOD_DATA = (DIRECTORY = C:\app\Administrator\admin\orcl\Server_Wallet) ) ) 3) File Name: listener.ora S SL_CLIENT_AUTHENTICATION = FALSE WALLET_LOCATION = (SOURCE = (METHOD = FILE) (METHOD_DATA = (DIRECTORY = C:\app\Administrator\admin\orcl\Server_Wallet) ) ) LISTENER = (DESCRIPTION_LIST = (DESCRIPTION = (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521)) ) (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = )(PORT 1521)) ) ) SSLLISTENER = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCPS)(HOST = )(PORT = 2484)) ) Thanks Santhosh

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• signalR groups - connecting/disconnecting and sending - am I missing something?

  - by Terry_Brown

  very new to signalR, and have rolled up a very simple app that will take questions for moderation at conferences (felt like a straight forward use case) I have 2 hubs at the moment: - Question (for asking questions) - Speaker (these should receive questions and allow moderation, but that will come later) Solution lives at https://github.com/terrybrown/InterASK After watching a video (by David Fowler/Damian Edwards) (http://channel9.msdn.com/Shows/Web+Camps+TV/Damian-Edwards-and-David-Fowler-Demonstrate-SignalR) and another that I can't find the URL for atm, I thought I'd go with 'groups' as the concept to keep messages flowing to the right people. I implemented IConnected, IDisconnect as I'd seen in one of the videos, and upon debugging I can see Connect fire (and on reload I can see disconnect fire), but it seems nothing I do adds a person to a group. The signalR documentation suggests "Groups are not persisted on the server so applications are responsible for keeping track of what connections are in what groups so things like group count can be achieved" which I guess is telling me that I need to keep some method (static or otherwise?) of tracking who is in a group? Certainly I don't seem able to send to groups currently, though I have no problem distributing to anyone currently connected to the app and implementing the same JS method (2 machines on the same page). I suspect I'm just missing something - I read a few of the other questions on here, but none of them seem to mention IConnected/IDisconnect, which tells me these are either new (and nobody is using them) or that they're old (and nobody is using them). I know this could be considered a subjective question, though what I'm looking for is just a simple means of managing the groups so that I can do what I want to - send a question from one hub, and have people connected to a different hub receive it - groups felt the cleanest solution for this? Many thanks folks. Terry

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• How to Use DataSource Property in DataFormWebPart

  - by Bryan Shen

  I'm writing a custom web part that extends DataFormWebPart. public class MyCustomWebPart : DataFormWebPart{ // other methods public override void DataBind() { XmlDataSource source = new XmlDataSource() { Data = @" <Person> <name cap='true'>Bryan</name> <occupation>student</occupation> </Person> " }; DataSources.Add(source); base.DataBind(); } } The only noticeable thing I do is overriding the DataBind() method, where I use xml as the data source. After I deploy the web part, I set the following XSL to it: <?xml version="1.0" encoding="utf-8"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/> <xsl:template match="/"> <xmp> <xsl:copy-of select="*"/> </xmp> </xsl:template> </xsl:stylesheet> This xsl will surround the input xml with a tag . So I expected the web part to display the original xml data as I wrote in C# code behind. But what shows up in the web part is this: <Person> <name cap="true" /> <occupation /> </Person> All the values within the inner-most tags disappear. What's going on? Can anybody help me? Thanks.

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• Resolving ambiguous this pointer in C++

  - by Paul Tevis

  I'm trying to derive a new class from an old one. The base class declaration looks like this: class Driver : public Plugin, public CmdObject { protected: Driver(); public: static Driver* GetInstance(); virtual Engine& GetEngine(); public: // Plugin methods... virtual bool InitPlugin (Mgr* pMgr); virtual bool Open(); virtual bool Close(); // CmdObject virtual bool ExecObjCmd(uint16 cmdID, uint16 nbParams, CommandParam *pParams, CmdChannelError& error); Mgr *m_pMgr; protected: Services *m_pServices; Engine m_Engine; }; Its constructor looks like this: Driver::Driver() : YCmdObject("Driver", (CmdObjectType)100, true), m_Engine("MyEngine") { Services *m_pServices = NULL; Mgr *m_pMgr = NULL; } So when I created my derived class, I first tried to simply inherit from the base class: class NewDriver : public Driver and copy the constructor: NewDriver::NewDriver() : CmdObject("NewDriver", (EYCmdObjectType)100, true), m_Engine("MyNewEngine") { Services *m_pServices = NULL; Mgr *m_pMgr = NULL; } The compiler (VisualDSP++ 5.0 from Analog Devices) didn't like this: ".\NewDriver.cpp", line 10: cc0293: error: indirect nonvirtual base class is not allowed CmdObject("NewDriver", (EYCmdObjectType)100, true), That made sense, so I decided to directly inherit from Plugin and CmdObject. To avoid multiple inheritance ambiguity problems (so I thought), I used virtual inheritance: class NewDriver : public Driver, public virtual Plugin, public virtual CmdObject But then, in the implementation of a virtual method in NewDriver, I tried to call the Mgr::RegisterPlugin method that takes a Plugin*, and I got this: ".\NewDriver.cpp", line 89: cc0286: error: base class "Plugin" is ambiguous if (!m_pMgr->RegisterPlugin(this)) How is the this pointer ambiguous, and how do I resolve it? Thanks, --Paul

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• Asp.net MVC jQuery Ajax calls to JsonResult return no data

  - by Maslow

  I have this script loaded on a page: (function() { window.alert('bookmarklet started'); function AjaxSuccess(data, textStatus, xmlHttpRequest) { if (typeof (data) == 'undefined') { return alert('Data is undefined'); } alert('ajax success' + (data || ': no data')); } function AjaxError(xmlHttpRequest, textStatus, errorThrown) { alert('ajax failure:' + textStatus); } /*imaginarydevelopment.com/Sfc*/ var destination = { url: 'http://localhost:3041/Bookmarklet/SaveHtml', type: 'POST', success: AjaxSuccess, error: AjaxError, dataType: 'text',contentType: 'application/x-www-form-urlencoded' }; if (typeof (jQuery) == 'undefined') { return alert('jQuery not defined'); } if (typeof ($jq) == 'undefined') { if (typeof ($) != 'undefined') { $jq = $; } else { return alert('$jq->jquerify not defined'); } } if ($jq('body').length <= 0) { return alert('Could not query body length'); } if ($jq('head title:contains(BookmarkletTest)').length > 0) { alert('doing test'); destination.data = { data: 'BookmarkletTestAjax' }; $jq.ajax(destination); return; } })(); when it is run locally in VS2008's cassini the ajax success shows the returned string from Asp.net MVC, when it is run remotely the ajax success data is null. Here's the controller method that is firing both locally and when run remotely: [AcceptVerbs(HttpVerbs.Post | HttpVerbs.Get)] public string SaveHtml(string data) { var path = getPath(Server.MapPath); System.IO.File.WriteAllText(path,data); Console.WriteLine("SaveHtml called"); Debug.WriteLine("SaveHtml called"); //return Json(new { result = "SaveHtml Success" }); return "SaveHtml Success"; } Once i have it working I was going to remove the GET, but currently accessing the SaveHtml method directly from the webbrowser produces the expected results when testing. So there's something wrong in my javascript I believe, because when I step through there with chrome's developer tools, I see the data is null, and the xmlHttpRequest doesn't appear to have the expected result in it anywhere either. I'm loading jquery via http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js

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• Draw to offscreen renderbuffer in OpenGL ES (iPhone)

  - by David Ensminger

  I'm trying to create an offscreen render buffer in OpenGL ES on the iPhone. I've created the buffer like this: glGenFramebuffersOES(1, &offscreenFramebuffer); glBindFramebufferOES(GL_FRAMEBUFFER_OES, offscreenFramebuffer); glGenRenderbuffersOES(1, &offscreenRenderbuffer); glBindRenderbufferOES(GL_RENDERBUFFER_OES, offscreenRenderbuffer); glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES, GL_RENDERBUFFER_OES, offscreenRenderbuffer); But I'm confused on how to render the storage. Apple's documentation says to use the EAGLContext renderBufferStorage:fromDrawable: method, but this seems to only work for one render buffer (the main one being displayed). If I use the normal OpenGL function glRenderBufferStorageOES, then I can't seem to get it to display. Here's the code: // this is in the initialization section: glRenderbufferStorageOES(GL_RENDERBUFFER_OES, GL_RGB8_OES, backingWidth, backingHeight); // and this is when I'm trying to draw to it and display it: glBindFramebufferOES(GL_FRAMEBUFFER_OES, offscreenFramebuffer); GLfloat vc[] = { 0.0f, 0.0f, 0.0f, 10.0f, 10.0f, 10.0f, 0.0f, 0.0f, 0.0f, -10.0f, -10.0f, -10.0f, }; glLoadIdentity(); glEnableClientState(GL_VERTEX_ARRAY); glVertexPointer(3, GL_FLOAT, 0, vc); glDrawArrays(GL_LINES, 0, 4); glDisableClientState(GL_VERTEX_ARRAY); glBindRenderbufferOES(GL_RENDERBUFFER_OES, offscreenRenderbuffer); [context presentRenderbuffer:GL_RENDERBUFFER_OES]; Doing it this way, nothing is displayed on the screen. However, if I switch out the references to "offscreen...Buffer" to the buffers that were created with the renderBufferStorage method, it works fine. Any suggestions?

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• How countdown get Synchronise with jquery using "jquery.countdown.js" plugin?

  - by ricky roy

  unable to get the correct Ans as i am getting from the Jquery I am using jquery.countdown.js ref. site http://keith-wood.name/countdown.html here is my code [WebMethod] public static String GetTime() { DateTime dt = new DateTime(); dt = Convert.ToDateTime("April 9, 2010 22:38:10"); return dt.ToString("dddd, dd MMMM yyyy HH:mm:ss"); } html file <script type="text/javascript" src="Scripts/jquery-1.3.2.js"></script> <script type="text/javascript" src="Scripts/jquery.countdown.js"></script> <script type="text/javascript"> $(function() { var shortly = new Date('April 9, 2010 22:38:10'); var newTime = new Date('April 9, 2010 22:38:10'); //for loop divid /// $('#defaultCountdown').countdown({ until: shortly, onExpiry: liftOff, onTick: watchCountdown, serverSync: serverTime }); $('#div1').countdown({ until: newTime }); }); function serverTime() { var time = null; $.ajax({ type: "POST", //Page Name (in which the method should be called) and method name url: "Default.aspx/GetTime", // If you want to pass parameter or data to server side function you can try line contentType: "application/json; charset=utf-8", dataType: "json", data: "{}", async: false, //else If you don't want to pass any value to server side function leave the data to blank line below //data: "{}", success: function(msg) { //Got the response from server and render to the client time = new Date(msg.d); alert(time); }, error: function(msg) { time = new Date(); alert('1'); } }); return time; } function watchCountdown() { } function liftOff() { } </script>

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• Spring Security HTTP Basic Authentication

  - by Raspayu

  Hi people! I am trying to do a really simple basic authentication with Spring Security. I have configured properly the namespace, and there are no Exceptions in the server. In my "servlet.xml" I have got the next for Spring Security: <security:http> <security:http-basic></security:http-basic> <security:intercept-url method="POST" pattern="/**" access="ROLE_USER" /> </security:http> <security:authentication-manager alias="authenticationManager"> <security:authentication-provider> <security:user-service> <security:user name="cucu" password="tas" authorities="ROLE_USER" /> <security:user name="bob" password="bobspassword" authorities="ROLE_USER" /> </security:user-service> </security:authentication-provider> </security:authentication-manager> It nearly all goes perfect: the methods that are not POST doesn't prompt any login form, and the POST method prompt it. The problem is, that nor "cucu", neither "bob" can login there. Can anyone see what am I doing wrong? Thanks in advance! ;-)

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• Moq: Unable to cast to interface

  - by Pickels

  Hello, earlier today I asked this question. So since moq creates it's own class from an interface I wasn't able to cast it to a different class. So it got me wondering what if I created a ICustomPrincipal and tried to cast to that. This is how my mocks look: var MockHttpContext = new Mock<HttpContextBase>(); var MockPrincipal = new Mock<ICustomPrincipal>(); MockHttpContext.SetupGet(h => h.User).Returns(MockPrincipal.Object); In the method I am trying to test the follow code gives the error(again): var user = (ICustomPrincipal)httpContext.User; The error is the following: Unable to cast object of type 'IPrincipalProxy4081807111564298854aabfc890edcc8' to type 'MyProject.Web.ICustomPrincipal'. I guess I still need some practice with interfaces and moq but shouldn't I be able to cast the class that moq created back to ICustomPrincipal? I know httpContext.User returns an IPrincipal so maybe something gets lost there? Well if anybody can help me I would appreciate that. Pickels Edit: As requested the full code of the method I am testing. It's still not finished but this is what I have so far: public bool AuthorizeCore(HttpContextBase httpContext) { if (httpContext == null) { throw new ArgumentNullException("httpContext"); } var user = (ICustomPrincipal)httpContext.User; if (!user.Identity.IsAuthenticated) { return false; } return true; }

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• Understanding the Silverlight Dispatcher

  - by Matt

  I had a Invalid Cross Thread access issue, but a little research and I managed to fix it by using the Dispatcher. Now in my app I have objects with lazy loading. I'd make an Async call using WCF and as usual I use the Dispatcher to update my objects DataContext, however it didn't work for this scenario. I did however find a solution here. Here's what I don't understand. In my UserControl I have code to call an Toggle method on my object. The call to this method is within a Dispatcher like so. Dispatcher.BeginInvoke( () => _CurrentPin.ToggleInfoPanel() ); As I mentioned before this was not enough to satisfy Silverlight. I had to make another Dispatcher call within my object. My object is NOT a UIElement, but a simple class that handles all its own loading/saving. So the problem was fixed by calling Deployment.Current.Dispatcher.BeginInvoke( () => dataContext.Detail = detail ); within my class. Why did I have to call the Dispatcher twice to achieve this? Shouldn't a high-level call be enough? Is there a difference between the Deployment.Current.Dispatcher and the Dispatcher in a UIElement?

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• iPhone: Memory leak when using NSOperationQueue...

  - by MacTouch

  Hi, I'm sitting here for at least half an hour to find a memory leak in my code. I just replaced an synchronous call to a (touch) method with an asynchronous one using NSOperationQueue. The Leak Inspector reports a memory leak after I did the change to the code. What's wrong with the version using NSOperationQueue? Version without a MemoryLeak -(NSData *)dataForKey:(NSString*)ressourceId_ { NSString *path = [self cachePathForKey:ressourceId_]; // returns an autoreleased NSString* NSString *cacheKey = [self cacheKeyForRessource:ressourceId_]; // returns an autoreleased NSString* NSData *data = [[self memoryCache] valueForKey:cacheKey]; if (!data) { data = [self loadData:path]; // returns an autoreleased NSData* if (data) { [[self memoryCache] setObject:data forKey:cacheKey]; } } [[self touch:path]; return data; } Version with a MemoryLeak (I do not see any) -(NSData *)dataForKey:(NSString*)ressourceId_ { NSString *path = [self cachePathForKey:ressourceId_]; // returns an autoreleased NSString* NSString *cacheKey = [self cacheKeyForRessource:ressourceId_]; // returns an autoreleased NSString* NSData *data = [[self memoryCache] valueForKey:cacheKey]; if (!data) { data = [self loadData:path]; // returns an autoreleased NSData* if (data) { [[self memoryCache] setObject:data forKey:cacheKey]; } } NSInvocationOperation *touchOp = [[NSInvocationOperation alloc] initWithTarget:self selector:@selector(touch:) object:path]; [[self operationQueue] addOperation:touchOp]; [touchOp release]; return data; } And of course, the touch method does nothing special too. Just change the date of the file. -(void)touch:(id)path_ { NSString *path = (NSString *)path_ NSFileManager *fm = [NSFileManager defaultManager]; if ([fm fileExistsAtPath:path]) { NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:[NSDate date], NSFileModificationDate, nil]; [fm setAttributes: attributes ofItemAtPath:path error:nil]; } }

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• .NET remoting exception: Permission denied: cannot call non-public or static methods remotely.

  - by Vilx-

  I'm writing a program which will allow to load a specific managed .DLL file and play with it. Since I want the ability to unload the .DLL file, I'm creating two AppDomains - one for the app itself, the other for the currently loaded .DLL. Since most of the objects in the loaded .DLL do not serialize well, I'm creating a MarshalByRefObject wrapper class which will keep the object itself in its own AppDomain, and expose some reflection functions to the main application AppDomain. However when I try to invoke a method on the remote object I get stuck with an exception: Permission denied: cannot call non-public or static methods remotely. This is very strange, because I'm not using any non-public or static methods at all. In essence, what I have is: class RemoteObjectWrapper: MarshalByRefObject { private Type SourceType; private object Source; public RemoteObjectWrapper(object source) { if (source == null) throw new ArgumentNullException("source"); this.Source = source; this.SourceType = source.GetType(); } public T WrapValue<T>(object value) { if ( value == null ) return default(T); var TType = typeof(T); if (TType == typeof(RemoteObjectWrapper)) value = new RemoteObjectWrapper(value); return (T)value; } public T InvokeMethod<T>(string methodName, params object[] args) { return WrapValue<T>(SourceType.InvokeMember(methodName, System.Reflection.BindingFlags.FlattenHierarchy | System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.InvokeMethod | System.Reflection.BindingFlags.Public, null, this.Source, args)); } } And I get the exception when I try to do: var c = SomeInstanceOfRemoteObjectWrapper.InvokeMethod<RemoteObjectWrapper>("somePublicMethod", "some string parameter"); What's going on here? As far as I can understand, the InvokeMethod method doesn't even get executed, the exception is thrown when I try to run it. Added: To clarify - SomeInstanceOfRemoteObjectWrapper is constructed in the .DLL's AppDomain and then returned to my main AppDomain, The InvokeMethod<T>() is called from my main AppDomain (and I expect it to execute in the .DLL's AppDomain).

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• Sharp architecture; Accessing Validation Results

  - by nabeelfarid

  I am exploring Sharp Architecture and I would like to know how to access the validation results after calling Entity.IsValid(). I have two scenarios e.g. 1) If the entity.IsValid() return false, I would like to add the errors to ModelState.AddModelError() collection in my controller. E.g. in the Northwind sample we have an EmployeesController.Create() action when we do employee.IsValid(), how can I get access to the errors? public ActionResult Create(Employee employee) { if (ViewData.ModelState.IsValid && employee.IsValid()) { employeeRepository.SaveOrUpdate(employee); } // .... } [I already know that when an Action method is called, modelbinder enforces validation rules(nhibernate validator attributes) as it parses incoming values and tries to assign them to the model object and if it can't parse the incoming values  then it register those as errors in modelstate for each model object property. But what if i have some custom validation. Thats why we do ModelState.IsValid first.] 2) In my test methods I would like to test the nhibernate validation rules as well. I can do entity.IsValid() but that only returns true/ false. I would like to Assert against the actual error not just true/ false. In my previous projects, I normally use a wrapper Service Layer for Repositories, and instead of calling Repositories method directly from controller, controllers call service layer methods which in turn call repository methods. In my Service Layer all my custom validation rules resides and Service Layer methods throws a custom exception with a NameValueCollection of errors which I can easily add to ModelState in my controller. This way I can also easily implement sophisticated business rules in my service layer as well. I kow sharp architecture also provides a Service Layer project. But what I am interested in and my next question is: How I can use NHibernate Vaidators to implement sophisticated custom business rules (not just null,empty, range etc.) and make Entity.IsValid() to verify those rules too ?

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• java.io.FileNotFoundException: /target/test.log

  - by sword101

  Greetings all I am using Apache Camel and Apache CXF in this example: http://camel.apache.org/better-jms-transport-for-cxf-webservice-using-apache-camel.data/cxfcamelexample.zip I followed the readme and when tried to run the client & server classes i got this exception: log4j:ERROR setFile(null,true) call failed. java.io.FileNotFoundException: /target/test.log (No such file or directory) at java.io.FileOutputStream.openAppend(Native Method) at java.io.FileOutputStream.<init>(FileOutputStream.java:177) at java.io.FileOutputStream.<init>(FileOutputStream.java:102) at org.apache.log4j.FileAppender.setFile(FileAppender.java:289) at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:163) at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:256) at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:132) at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:96) at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:654) at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:612) at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:509) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:415) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:441) at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:470) at org.apache.log4j.LogManager.<clinit>(LogManager.java:122) at org.apache.log4j.Logger.getLogger(Logger.java:104) at org.apache.commons.logging.impl.Log4JLogger.getLogger(Log4JLogger.java:283) at org.apache.commons.logging.impl.Log4JLogger.<init>(Log4JLogger.java:108) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.apache.commons.logging.impl.LogFactoryImpl.createLogFromClass(LogFactoryImpl.java:1040) at org.apache.commons.logging.impl.LogFactoryImpl.discoverLogImplementation(LogFactoryImpl.java:838) at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:601) at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:333) at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:307) at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:645) at org.springframework.context.support.AbstractApplicationContext.<init>(AbstractApplicationContext.java:146) at org.springframework.context.support.AbstractRefreshableApplicationContext.<init>(AbstractRefreshableApplicationContext.java:84) at org.springframework.context.support.AbstractRefreshableConfigApplicationContext.<init>(AbstractRefreshableConfigApplicationContext.java:59) at org.springframework.context.support.AbstractXmlApplicationContext.<init>(AbstractXmlApplicationContext.java:58) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:136) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93) at com.example.customerservice.impl.CustomerServiceClient.main(CustomerServiceClient.java:34) so any ideas, how to solve this exception ?

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• Trouble converting an MP3 file to a WAV file using Naudio

  - by WebDevHobo

  Naudio Library: http://naudio.codeplex.com/ I'm trying to convert an MP3 file to a WAV file, but I've run in to a small error. I know what's going wrong, but I don't really know how to go about fixing it. Here's the piece of code I'm running: private void button1_Click(object sender, EventArgs e) { using(Mp3FileReader reader = new Mp3FileReader(@"path\to\MP3")) { using(WaveFileWriter writer = new WaveFileWriter(@"C:\test.wav", new WaveFormat())) { int counter = 0; while(reader.Read(test, counter, test.Length + counter) != 0) { writer.WriteData(test, counter, test.Length + counter); counter += 512; } } } } reader.Read() goes into the Mp3FileReader class, and the method looks like this: public override int Read(byte[] sampleBuffer, int offset, int numBytes) { if (numBytes % waveFormat.BlockAlign != 0) //throw new ApplicationException("Must read complete blocks"); numBytes -= (numBytes % waveFormat.BlockAlign); return mp3Stream.Read(sampleBuffer, offset, numBytes); } mp3Stream is an object of the Stream class. The problem is: I'm getting an ArgumentException. MSDN says that this is because the sum of offset and numBytes is greater than the length of sampleBuffer. Documentation: http://msdn.microsoft.com/en-us/library/system.io.stream.read.aspx This happens because I increase the counter every time, but the size of the byte array test remains the same. What I've been wondering is: do I need to increase the size of the array dynamically, or do I need to find out the needed size at the beginning and set it right away? And also, instead of 512, the method in Mp3FileReader returns 365 the first time. Which is the size of a whole block. But I'm writing the full 512. I'm basically just using the read to check if I'm not at the end of the file yet. Do I need to catch the return value and do something with that, or am I good here?

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• facebook connect api "Cannot use string offset as an array in" error

  - by Rees

  Please help! I have been grappling with this error for days and I cannot for the life of me figure it out. I am using facebook connect and fetching a "contact_email" attribute using their api method users_getInfo. The issue is that when I execute this PHP file, i get this error: "Cannot use string offset as an array in...". This error specifically refers to this line of code: $firstName=$user_details[0]['contact_email']; I'm thinking this is because the user_getInfo method is not returning any results... However, the most ridiculous part about all this is that, I can execute the code below several dozens of times in a row SUCCESSFULLY without the above error, BUT THEN randomly without changing ANY code at all, I will suddenly encounter this error, in which case it will begin to give me an error several dozens of times, and then AGAIN without any code change, start executing successfully again. This odd behavior occurs regardless of the attribute i am fetching.. (contact_email, first_name, last_name, etc.). I am running php 5.2.11. Is there something I'm missing?? Please Help! include_once 'site/fbconnect/config.php'; //has $api_key and $secret defined. include_once 'site/facebook-platform/client/facebook.php'; global $api_key,$secret; $fb=new Facebook($api_key,$secret); $fb-require_login(); $fb_user=$fb-get_loggedin_user(); $user_details=$fb-api_client-users_getInfo($fb_user,array('last_name','first_name','contact_email')); $email=$user_details[0]['contact_email']; $firstName=$user_details[0]['first_name']; $lastName=$user_details[0]['last_name'];

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• cakephp paginate using mysql SQL_CALC_FOUND_ROWS

  - by michael

  I'm trying to make Cakephp paginate take advantage of the SQL_CALC_FOUND_ROWS feature in mysql to return a count of total rows while using LIMIT. Hopefully, this can eliminate the double query of paginateCount(), then paginate(). http://dev.mysql.com/doc/refman/5.0/en/information-functions.html#function_found-rows I've put this in my app_model.php, and it basically works, but it could be done better. Can someone help me figure out how to override paginate/paginateCount so it executes only 1 SQL stmt? /** * Overridden paginateCount method, to using SQL_CALC_FOUND_ROWS */ public function paginateCount($conditions = null, $recursive = 0, $extra = array()) { $options = array_merge(compact('conditions', 'recursive'), $extra); $options['fields'] = "SQL_CALC_FOUND_ROWS `{$this->alias}`.*"; Q: how do you get the SAME limit value used in paginate()? $options['limit'] = 1; // ideally, should return same rows as in paginate() Q: can we somehow get the query results to paginate directly, without the extra query? $cache_results_from_paginateCount = $this->find('all', $options); /* * note: we must run the query to get the count, but it will be cached for multiple paginates, so add comment to query */ $found_rows = $this->query("/* do not cache for {$this->alias} */ SELECT FOUND_ROWS();"); $count = array_shift($found_rows[0][0]); return $count; } /** * Overridden paginate method */ public function paginate($conditions, $fields, $order, $limit, $page = 1, $recursive = null, $extra = array()) { $options = array_merge(compact('conditions', 'fields', 'order', 'limit', 'page', 'recursive'), $extra); Q: can we somehow get $cache_results_for_paginate directly from paginateCount()? return $cache_results_from_paginateCount; // paginate in only 1 SQL stmt return $this->find('all', $options); // ideally, we could skip this call entirely }

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• Why is Dispatcher.Invoke not triggering UI update?

  - by Brandon

  I am trying to reuse a UserControl and also borrow some logic that keeps track of progress. I'll try and simplify things. MyWindow.xaml includes a MyUserControl. MyUserControl has its own progress indicator (Formatting in progress..., Copying files..., etc.) and I'd like to mirror this progress somewhere in the MyWindow form. But, the user control has some logic I don't quite understand. I've read and read but I still don't understand the Dispatcher. Here's a summary of the logic in the user control that updates the progress. this.Dispatcher.Invoke(DispatcherPriority.Input, (Action)(() => { DAProgressIndicator = InfiniteProgress.AddNewInstanceToControl(StatusGrid, new SolidColorBrush(new Color() { A = 170, R = 128, G = 128, B = 128 }), string.Empty); DAProgressIndicator.Message = MediaCardAdminRes.ActivatingCard; ActivateInProgress = true; })); I thought I'd be smart and add an event to MyUserControl that would be called in the ActivateInProgress property set logic. public bool ActivateInProgress { get { return _activateInProgress; } set { _activateInProgress = value; if (ActivateInProgressHandler != null) { ActivateInProgressHandler(value); } } } I'm setting the ActivateInProgressHandler within the MyWindow constructor to the following method that sets the view model property that is used for the window's own progress indicator. private void SetActivation(bool activateInProgress) { viewModel.ActivationInProgress = activateInProgress; } However, the window's progress indicator never changes. So, I'm convinced that the Dispatcher.Invoke is doing something that I don't understand. If I put a message box inside the SetActivation method, the thread blocks and the window's progress indicator is updated. I understand basic threads but this whole Dispatcher thing is new to me. What am I missing?

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• Using Tweet# to pull 5 most recent updates from a user

  - by Richard West

  I am working on a method that will allow me to pull in the 5 most recent posts that my company has made on it's Twitter account. One requirement of this web application is that it present these twitter posts as "regular" html in our website, so using the Twitter javascript method is ruled out. I have found Tweet#, a C# plugin that exposes the Twitter commands. This seems to be a nice way to pull this information but I have a question. I would like to be able to pull these updates from Twitter without authenticating to Twitter. Since the information is publically available I would think this would be fairly simple, however I'm having a problem with Tweet# wanting to do this. The cloest I have found to be able to do this requires my to login/authenticate with Twitter and then pull the 5 most recent tweets. Like this: var twitter = FluentTwitter.CreateRequest() .AuthenticateAs("UserName", "p@ssw0rd") .Configuration.CacheForInactivityOf(60.Seconds()) .Statuses().OnUserTimeline().Take(5).AsJson(); What I need is something that will allow my to specific the user id to pull the most recent 5 tweets from without authentication.

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• Update CGridView when a dropdown value changes

  - by Gautam Borad

  I have a CGridView with columns from a table "product" => {'product_id','category_id',...} I have another table "category" => {'category_id','category_name'} category_id is the FK in the product table. Now i want a dropdown list of the category table and on selecting a particular value the CGridView of product should be updated to show only the rows with that category_id. I also need the column filtering/sorting for the CGridView to work (using AJAX). I was able to refresh the CGridView when a value is selected from the dropdown, however i am not able to send the category_id with the 'data' for the CGridView: clientScript-registerScript('search', " $('.cat_dropdown').change(function(){ $.fn.yiiGridView.update('order-grid', { data: $(this).serialize(), }); return false; }); "); The data: $(this).serialize() sends only the values that are present in the filtering text fields of the CGridView. How do i append the category_id with it? If the above method is not the right one, please suggest an alternative method.

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