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• Grails Shiro plugin : confirming my understanding

  - by bsreekanth

  I'm bit vague about how to start using the shiro plugin, after reading few documents. I decided against Nimble, as it comes with few tables and UI plugins. I setup shiro plugin with wildcard realm, with my own tables. I may use permission based (rather tan role based) access control as it scales well. Now, the steps for it. assign the permission string to the subject, and save it in the db check the permission through isPermitted, hasPermission (or relevant tags in GSP). Now, 1. when to use the accesscontrol through filter? 2. is there a closure injected into the controller where I can define the permission for the actions in it? 3. How do I create a typical access control scenario like only the creator of (something, a post etc) can delete it? thanks a lot.. Babu.

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• Eclipse uses 100 % CPU randomly

  - by Florian Gutmann

  Hi everyone! My eclipse sometimes starts using 100 % of my CPU very spontaneously. I can't figure out why it needs that much CPU usage. There is no background task like "building workspace" running. After some time the CPU load drops to 0 and everything is normal. I can't find any information related to the problem in workspace/.metadata/.log file. Has anybody some tip how i can figure out which part of eclipse is using the CPU so heavily? Is there a way to get a thread dump of eclipse? The kill -3 on the eclipse process doesn't do anything. Eclipse Version: Galileo JavaEE Operating System: Linux 2.6.31 Thanks in advance! Florian

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• Adding rows to UItableview and passing data between Viewcontrollers

  - by Jonathan

  I have a list of websites in a plist, when the app loads this populates a tableview (which is inside a navigation controller) But I have added an add button to the navigation bar and then created another View Controller to deal with inputting of the new website (Like Title and URL). It is very similar to how the contacts app looks. There is a table view and when you tap add, the add UI slides up. I have got all this working great so far. My Problem is what happens when the user taps Done. I can add the website to the plist (each website is a dictionary in the plist with 2 keys, atm) But then how do I tell the tableView to update? The table view has not been removed from the main window, just the add view has been added on top of the "screen". Another way of asking is, when you tap Save on Add a Contact screen: (not my image) How does the new contact's data (Xyz's data) get shown on the tableview?

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• WinForms Taskbar Icon - Click Event not firing

  - by Greycrow

  I have created a non-form c# program that uses the NotifyIcon class. The text "(Click to Activate)" shows up when I hover the mouse. So I am getting some events handled. However, The "Click" event does not fire and the Context menu doesnt show up. public class CTNotify { static NotifyIcon CTicon = new NotifyIcon(); static ContextMenu contextMenu = new ContextMenu(); static void Main() { //Add a notify Icon CTicon.Icon = new Icon("CTicon.ico"); CTicon.Text = "(Click to Activate)"; CTicon.Visible = true; CTicon.Click += new System.EventHandler(CTicon_Click); //Create a context menu for the notify icon contextMenu.MenuItems.Add("E&xit"); //Attach context menu to icon CTicon.ContextMenu = contextMenu; while (true) //Infinite Loop { Thread.Sleep(300); //wait } } private static void CTicon_Click(object sender, System.EventArgs e) { MessageBox.Show("Clicked!"); } }

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• Programmatically change the default code page in Windows XP? (from Delphi)

  - by Duncan

  Could anyone advise how to programmatically change the default Windows XP code page (I'm doing this from Delphi)? (This would be the equivalent of going into Control Panel - Regional Settings - Language for non-Unicode applications). In this case, I want to switch to Chinese (PRC) and so am writing to the following registry strings: HKLM\SYSTEM\CurrentControlSet\Control\Nls\CodePage\ ACP=936 MACCP=10008 OEMCP=936 (Which is exactly what changing the non-Unicode codepage drop down in Control Panel does). There must be another setting which I need to change - and I'd prefer to use a Win API call (if available) rather than writing to the registry myself. I've also tried setting HKLM\SYSTEM\CurrentControlSet\Control\Nls\Language\ Default=0804 (Chinese PRC) to no avail. I don't want to change the 'locale' per se as this will also change time / date settings, separators, etc. etc. This is because I'm using an ANSI application that needs to render Chinese characters, and I'm writing a tool to automatically switch the system show the characters (while leaving other aspects of the UI intact). Thanks! Duncan

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• Why doesn’t ABPersonViewController show any properties besides the name?

  - by abrahamvegh

  For some reason, ABPersonViewController is unwilling to display any properties aside from the name, no matter what properties are set for it to display. I’m unable to use the AddressBookUI controllers to let a user select a contact to display, since my UI has custom requirements, otherwise I’d go that route (as Apple does in their sample project.) Here’s the code that doesn’t work — am I missing something? - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { // ABContact is of my own creation ABContact *contact = [self contactAtIndexPath: indexPath]; ABPersonViewController *viewController = [[ABPersonViewController alloc] init]; // This returns a valid ABRecordRef, as indicated by the fact that the // controller does display the name of this contact when it is loaded viewController.displayedPerson = contact.record; // Copied directly from Apple’s QuickContacts sample project NSArray *displayedItems = [NSArray arrayWithObjects:[NSNumber numberWithInt:kABPersonPhoneProperty], [NSNumber numberWithInt:kABPersonEmailProperty], [NSNumber numberWithInt:kABPersonBirthdayProperty], nil]; viewController.displayedProperties = displayedItems; [self.navigationController pushViewController: viewController animated: YES]; [viewController release]; }

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• How do I use the iPhone Simulator in 3.2 (not iPad Simulator)

  - by JustinXXVII

  I'm fixing my app to be a universal binary. Testing on the simulator seems to default to the iPad. For small corrections like checking orientations and small UI updates, the only way I can find to get the iPhone version is to plug in my iPhone and build and run on device. Loading the debugger takes valuable time, when running on simulator is so much faster for this kind of work. Can I set the simulator to default to iPhone for this? Setting it to 3.1.3 doesn't work because of the 3.2 code I have in the binary for the iPad.

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• Deciding between Apache Commons exec or ProcessBuilder

  - by Moev4

  I am trying to decide as to whether to use ProcessBuilder or Commons exec, My requirements are that I am simply trying to create a daemon process whose stdout/stdin/stderr I do not care about. In addition I want to execute a kill to destroy this process when the time comes. I am using Java on Linux. I know that both have their pains and pitfalls (such as being sure to use separate thread to swallow streams can lead to blocking or deadlocks, and closing the streams so not to leave open files hanging around)and wanted to know if anyone had suggestions one way or the other as well as any good resources to follow.

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• WCF - Passing CurrentPrincipal in the Header

  - by David Ward

  I have a WCF service that needs to know the Principal of the calling user. In the constructor of the service I have: Principal = OperationContext.Current.IncomingMessageHeaders.GetHeader<MyPrincipal>("myPrincipal", "ns"); and in the calling code I have something like: using (var factory = new ChannelFactory<IMyService>(localBinding, endpoint)) { var proxy = factory.CreateChannel(); using (var scope = new OperationContextScope((IContextChannel)proxy)) { var customHeader = MessageHeader.CreateHeader("myPrincipal", "ns", Thread.CurrentPrincipal); OperationContext.Current.OutgoingMessageHeaders.Add(customHeader); newList = proxy.CreateList(); } } This all works fine. My question is, how can I avoid having to wrap all proxy method calls in the using (var scope...{ [create header and add to OperationContext]? Could I create a custom ChannelFactory that will handle adding the myPrincipal header to the operation context? Something like that would save a whole load of copy/paste which I'd rather not do but I'm not sure how to achieve it:) Thanks

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• Dynamically creating GWT screens using Metadata?

  - by Francis Shanahan

  I have an AWT applet application that needs to be ported over to GWT. The applet screens are described in meta data and the applet renders each screen dynamically using reflection. We'd like the same thing in GWT/ExtGWT. I've built a working version of this ExtJS whereby the metadata is turned into ExtJS Screen configs in the form of JSON. The drawback with this approach is the "wiring" of controls to data needs to be written in Javascript. GWT is preferred since it'd be all Java code, no JS. Upon digging in it's possible to render the screens using GWT off the metadata using GWT.create(). The problem I'm having is the wiring to hook a dynamically created button for example to an event handler requires reflection which is not supported in GWT. Is this conclusion correct? and if so, are there any other ways to achieve this type of dynamic UI using ExtGWT?

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• atomic writes to ehcache

  - by Jacques René Mesrine

  Context I am storing a java.util.List inside ehcache. Key(String) --> List<UserDetail> The ordered List contains a Top 10 ranking of my most active users. Problem Concurrent 3rd party clients might be requesting for this list. I have a requirement to be as current as possible with regards to the ranking. Thus if the ranking is changed due the activities of users, the ordered List in the cache must not be left stale for very long. Once I've recalculated a new List, I want to replace the one in cache immediately. Consider a busy scenario whereby multiple concurrent clients are requesting for the ranking; how can I replace the cache item in an fashion such that: Clients can continue to pull a possibly stale snapshot. They should never get a null value. There will only be 1 server thread that writes to the cache.

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• Ajax.ActionLink is not POSTing

  - by Dave Hanna

  I am trying to navigate to an MVC action by POSTing rather than GETting. (The action is a DELETE, and I don't want it reachable by an external link.) I am using a link in a grid generated by Ajax.ActionLink("Remove", "Delete", new { saID = Model.Said, id = e.id }, new AjaxOptions { HttpMethod = "POST", Confirm = "Are you sure you want to delete this item?" }) Which generates the following HTML: <a href="/Equipment/Delete/102424/229933" onclick="Sys.Mvc.AsyncHyperlink.handleClick(this, new Sys.UI.DomEvent(event), { insertionMode: Sys.Mvc.InsertionMode.replace, confirm: 'Are you sure you want to delete this item?', httpMethod: 'POST' });">Remove</a> My problem is that when I click on the link, I am reaching the Delete action via a GET rather than a POST, AND the Confirm dialog is not taking place. I have been googling this for several hours and just keep getting wrapped around the axle. What am I doing wrong?

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• Proper Case Title Case Question

  - by Michael Quiles

  What am i doing wrong here? I want the users name to be shown in the output as propercase but I cant figure it out. string proper = this.xTripNameTextBox.Text; CultureInfo properCase = System.Threading.Thread.CurrentThread.CurrentCulture; TextInfo currentInfo = properCase.TextInfo; proper = currentInfo.ToTitleCase(proper); this.xTripOutputLabel.Text = proper + Environment.NewLine + "The total gallons you would use: " + Output.ToString("0") + Environment.NewLine + "Total amount it will cost you: " + Coutput.ToString("C") + Environment.NewLine +" Your customer number is " + rnd1.Next(1, 1000).ToString();

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• Logging strategy vs. performance

  - by vtortola

  Hi, I'm developing a web application that has to support lots of simultaneous requests, and I'd like to keep it fast enough. I have now to implement a logging strategy, I'm gonna use log4net, but ... what and how should I log? I mean: How logging impacts in performance? is it possible/recomendable logging using async calls? Is better use a text file or a database? Is it possible to do it conditional? for example, default log to the database, and if it fails, the switch to a text file. What about multithreading? should I care about synchronization when I use log4net? or it's thread safe out of the box? In the requirements appear that the application should cache a couple of things per request, and I'm afraid of the performance impact of that. Cheers.

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• Should I use Mutex OR Critical Section for Windows Mobile RIL

  - by afriza

  Hi, I am using a Radio Layer Interface (RIL) Native API in Windows Mobile application. In this API, the return values / results of most functions are not returned immediately but are passed through a callback function which is passed to the RIL API. Some usage examples are found at XDA Develompent Tools and Google Gears Geolocation API. My question is, in these two examples, a mutex is used to guard the data instead of other synchronization objects. Now, will Critical Section do fine here in the use cases described by both examples? Which thread or process will actually call the callback functions?

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• java.lang.NoSuchMethodError: main when starting HelloWorld with Eclipse Scala plugin

  - by Matt Sheppard

  I've just been playing with Scala, and installed the Eclipse plugin as described at http://www.scala-lang.org/node/94, but after entering the "Hello World" test example and setting up the run configuration as described, I get the following error Exception in thread "main" java.lang.NoSuchMethodError: main For reference the code is package hello object HelloWorld extends Application { println("Hello World!") } I've tinkered a bit with the obvious solutions (adding a main method, adding a singleton object with a main method) but I'm clearly doing something wrong. Can anyone get their test example to work, or point out what I am doing wrong?

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• Android Image Orientation Issue on Motorola Droid

  - by roundhill

  Hi there, Our app uses the gallery pick action to grab an image from the device to upload to a new blog post. We're seeing on the Moto Droid that images taken in portrait are being sent back to the app in landscape orientation so the image is sideways. AFAIK this only occurs on the Droid. Found this via google, but we need the full size image to be uploaded in the correct orientation so the solution doesn't work for us: http://groups.google.com/group/android-developers/browse_frm/thread/1246475fd4c3fdb6?pli=1 An easy way to reproduce this is to take a picture in portrait on the Droid, then send it to yourself via Gmail. In the email message, the image will be in landscape (sideways). I've tested on the droid 2.1 update and the issue is still there.

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• How to avoid "The name 'ConfigurationManager' does not exist in the current context" error?

  - by 5YrsLaterDBA

  I am using VS2008. I have a project connect with a database and the connection string is read from App.config via ConfigurationManager. We are using L2E. Now I added a helper project, AndeDataViewer, to have a simple UI to display data from the database for testing/verification purpose. I don't want to create another set of Entity Data Model in the helper project. I just added all related files as a link in the new helper project. When I compile, I got the following error: Error 15 The name 'ConfigurationManager' does not exist in the current context C:\workspace\SystemSoftware\SystemSoftware\src\systeminfo\RuntimeInfo.cs 24 40 AndeDataViewer I think I may need to add another project setting/config related file's link to the helper project from the main project? There is no App.config file in the new helper project. But it looks I cannot add that file's link to the helper project. Any ideas?

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• How to access MyProject.MySettings.Default.SomeSetting from xaml?

  - by Shimmy

  I have defined a StringCollection in the Project Settings. I want to use the values in a ComboBox. Is there a way to access it xamly? I tried: <CollectionViewSource Source="{x:Static src:MySettings.Default.MyCollection}" /> <CollectionViewSource x:Key="RoomSections" Source="{x:Static src:MySettings.Default.RoomSections}" /> *src is the xmlns of the project It says: "Type src:MySettings.Default was not found". The thing is that MySettings is a class that offers a Default property which is a thread-safe instance of MySettings, I really want to get the collection from the Default property and not by instantiating a new on. Is there other ways I am not aware of, maybe ObjectDataProvider can access static objects? I thought, maybe I can make in the App.xaml a global resource that return MySettings.Default which is an instance of the MySettings class, and then access all its properties, I will try that out, but I prefer the easy way.

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• How can I set up .NET UnhandledException handling in a Windows service?

  - by Mike Pateras

  protected override void OnStart(string[] args) { AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException); Thread.Sleep(10000); throw new Exception(); } void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e) { } I attached a debugger to the above code in my windows service, setting a breakpoint in CurrentDomain_UnhandledException, but it was never hit. The exception pops up saying that it is unhandled, and then the service stops. I even tried putting some code in the event handler, in case it was getting optimized away. Is this not the proper way to set up unhandled exception handling in a windows service?

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• How to get vm arguments from inside of java application?

  - by Dmitriy Matveev

  Hello, I need to check if some option which can be passed to JVM is explicitly set or is it have default value. To be more specific: I need to create one specific thread with higher native stack size than the default one, but in case then user want to take care of such things by himself by specifying -Xss option I want to create all threads with default stack size (which will be specified by user in -Xss option). I've checked classes like java.lang.System and java.lang.Runtime, but these aren't giving me information about vmargs. Is there any way to get information I need?

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• Is DataGrid a necessity in WPF?

  - by Jobi Joy

  I have seen a lot of discussions going on and people asking about DataGrid for WPF and complaining about Microsoft for not having one with their WPF framework till date. We know that WPF is a great UI technology and have the Concept of ItemsControl,DataTemplate, etc,etc to make great UX. Even WPF has got a more closely matching control- ListView, which can be easily templated to give better UX than a traditional Datagrid like display. And I would say a readymade DataGrid control will kill or hide a lot of creativity and it surely will decrease the innovations in User Experience field. So what is your opinion about the need of DataGrid in WPF as a Framework component? If you feel it is necessary then is it just because the world is so used to the DatGrid way of data display for many years? Some other threads having the discussion about DatGrid are here and here Link to WPF ToolKit - Latest WPF DatGrid

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• Apache on linux : spawning processes or threads ?

  - by Jerome WAGNER

  Hello, I would like to understand better exactly what is going on when Apache on linux receive an HTTP request in a process pre-fork model. Let's say we have 20 Apache child processes waiting. When I receive an HTTP request, is it true to say that 1 child process will be chosen to handle the request and that this process won't handle another request from another user until the first one is finished ? I am asking the question because of a PHP limitation that states : The locale information is maintained per process, not per thread. If you are running PHP on a multithreaded server API like IIS or Apache on Windows, you may experience sudden changes in locale settings while a script is running, though the script itself never called setlocale(). This happens due to other scripts running in different threads of the same process at the same time, changing the process-wide locale using setlocale(). Thanks Jerome Wagner

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• CrossPost access to data

  - by Craig

  Hi, I have a search form on a page that posts back to itself and shows the results, all works fine. I now have a requirement to put the same search form on the site home page. This needs to post back to the search form and run the findResults code. Using the PostBackURL parameter on the home page form's submit button I can hit the search page ok. However, when using the following code in the Page_Load section of the search page I hit the problem of not being able to access data from the posting page as I get the following error message on the line starting "yearList.SelectedValue....": "'Site._default1.Protected WithEvents yearList As System.Web.UI.WebControls.DropDownList' is not accessible in this context because it is 'Protected'". '################################# '# Handle form post from Home page '################################# Dim crossPostBackPage As Site._default1 If Not (Page.PreviousPage Is Nothing) Then If Not (Page.IsCrossPagePostBack) Then If (Page.PreviousPage.IsValid) Then crossPostBackPage = CType(PreviousPage, Site._default1) yearList.SelectedValue = crossPostBackPage.yearList.SelectedValue getAvailability() End If End If End If As I didn't declare yearList Protected, I don't know where to change it or how to. Any advice would be appreciated, Craig

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• Silverlight tests not working unless RDP connection open

  - by Duncan Bayne

  I have a few Silverlight UI tests that I'm automating with White. These tests are subsequently run by a TFS build agent, which is running interactively so it can access the desktop. The build passes if I have a Remote Desktop connection open to the build agent as the tests are run; I can see the mouse pointer moving around. When the test clicks on a HyperlinkButton navigation takes place, and is subsequently verified by assertions within the test. The build fails if I do not have a Remote Desktop connection open to the build agent as the tests are run. The Internet Explorer window is created and the Silverlight app loads, but no clicks happen; the application remains on the initial page and test assertions subsequently fail. Has anyone out there found a solution to this problem?

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