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• Jets3t on Android

  - by Chubbs

  Hey guys, I am trying to use the Jets3t library within an Android application, and I keep getting errors with the Rest service when I use the library. 04-27 16:47:39.491: ERROR/S3Service(225): Couldn't initialize a sax driver for the XMLReader I have tried to include the Xerces library and the Crimson library, and it dont play well. I get this error: Attempt to include a core class (java.* or javax.*) in something other than a core library. It is likely that you have attempted to include in an application the core library (or a part thereof) from a desktop virtual machine. This will most assuredly not work. At a minimum, it jeopardizes the compatibility of your app with future versions of the platform. It is also often of questionable legality. If you really intend to build a core library -- which is only appropriate as part of creating a full virtual machine distribution, as opposed to compiling an application -- then use the "--core-library" option to suppress this error message. Is there something I can do to get it working ?

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• VBA: Read file from clipboard

  - by ReturningTarzan

  I'm trying to load a file in a VBA macro that has been copied from, say, an Explorer window. I can easily get the data from the clipboard using DataObject::GetFromClipboard, but the VBA interface to DataObject doesn't seem to have methods for working with any other formats than plain text. There are only GetText and SetText methods. If I can't get a file stream directly from the DataObject, the filename(s) would also do, so maybe GetText could be forced to return the name of a file placed on the clipboard? There is very little documentation to be found for VBA anywhere. :( Maybe someone could point me to an API wrapper class for VBA that has this sort of functionality?

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• XML documentation to context sensitive help

  - by Yonas

  These days a number of commercial and open source tools have been developed for this purpose. However(unfortunately), non of them meet my requirement for specific problem I am dealing with. Currently, I am working on a project that exposes a different classes and functions to user as scripting interface. the user can use the objects from custom scripting interface and call methods to solve some specific problem. The problem I am facing is users of my classes need some sort of documentation in order to write their script efficiently. To address this problem am planing to use the compiler generated XML file to provide context sensitive help, which allows users to mouse over on any of the controls and corresponding methods from the GUI and read the reference documentation of the class/method. Now ... here are my questions: Can I get the sample source code? Can any one give me someone point me to some sort of best approach to address the problem?

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• EJB3 Transaction Propogation

  - by Matt S.

  I have a stateless bean something like: @Stateless public class MyStatelessBean implements MyStatelessLocal, MyStatelessRemote { @PersistenceContext(unitName="myPC") private EntityManager mgr; @TransationAttribute(TransactionAttributeType.SUPPORTED) public void processObjects(List<Object> objs) { // this method just processes the data; no need for a transaction for(Object obj : objs) { this.process(obj); } } @TransationAttribute(TransactionAttributeType.REQUIRES_NEW) public void process(Object obj) { // do some work with obj that must be in the scope of a transaction this.mgr.merge(obj); // ... this.mgr.merge(obj); // ... this.mgr.flush(); } } The typically usage then is the client would call processObjects(...), which doesn't actually interact with the entity manager. It does what it needs to do and calls process(...) individually for each object to process. The duration of process(...) is relatively short, but processObjects(...) could take a very long time to run through everything. Therefore I don't want it to maintain an open transaction. I do need the individual process(...) operations to operate within their own transaction. This should be a new transaction for every call. Lastly I'd like to keep the option open for the client to call process(...) directly. I've tried a number of different transaction types: never, not supported, supported (on processObjects) and required, requires new (on process) but I get TransactionRequiredException every time merge() is called. I've been able to make it work by splitting up the methods into two different beans: @Stateless @TransationAttribute(TransactionAttributeType.NOT_SUPPORTED) public class MyStatelessBean1 implements MyStatelessLocal1, MyStatelessRemote1 { @EJB private MyStatelessBean2 myBean2; public void processObjects(List<Object> objs) { // this method just processes the data; no need for a transaction for(Object obj : objs) { this.myBean2.process(obj); } } } @Stateless public class MyStatelessBean2 implements MyStatelessLocal2, MyStatelessRemote2 { @PersistenceContext(unitName="myPC") private EntityManager mgr; @TransationAttribute(TransactionAttributeType.REQUIRES_NEW) public void process(Object obj) { // do some work with obj that must be in the scope of a transaction this.mgr.merge(obj); // ... this.mgr.merge(obj); // ... this.mgr.flush(); } } but I'm still curious if it's possible to accomplish this in one class. It looks to me like the transaction manager only operates at the bean level, even when individual methods are given more specific annotations. So if I mark one method in a way to prevent the transaction from starting calling other methods within that same instance will also not create a transaction, no matter how they're marked? I'm using JBoss Application Server 4.2.1.GA, but non-specific answers are welcome / preferred.

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• Memory mapped files causes low physical memory

  - by harik

  I have a 2GB RAM and running a memory intensive application and going to low available physical memory state and system is not responding to user actions, like opening any application or menu invocation etc. How do I trigger or tell the system to swap the memory to pagefile and free physical memory? I'm using Windows XP. If I run the same application on 4GB RAM machine it is not the case, system response is good. After getting choked of available physical memory system automatically swaps to pagefile and free physical memory, not that bad as 2GB system. To overcome this problem (on 2GB machine) attempted to use memory mapped files for large dataset which are allocated by application. In this case virtual memory of the application(process) is fine but system cache is high and same problem as above that physical memory is less. Even though memory mapped file is not mapped to process virtual memory system cache is high. why???!!! :( Any help is appreciated. Thanks.

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• PageMethods security

  - by TenaciousImpy

  Hi, I'm trying to 'AJAX-ify' my site in order to improve the UI experience. In terms of performance, I'm also trying to get rid of the UpdatePanel. I've come across a great article over at Encosia showing a way of posting using PageMethods. My question is, how secure are page methods in a production environment? Being public, can anyone create a JSON script to POST directly to the server, or are there cross-domain checks taking place? My PageMethods would also write the data into the database (after filtering). I'm using Forms Authentication in my pages and, on page load, it redirects unauthenticated users to the login page. Would the Page Methods on this page also need to check authentication if the user POSTs directly to the method, or is that authentication inherited for the entire page? (Essentially, does the entire page cycle occur even if a user has managed to post only to the PageMethod)? Thanks

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• Problem with Gallio and TeamCity and the new Visual Studio 2010 release

  - by Bernard Larouche

  I am running TeamCity on a virtual machine. I have installed the new Visual Studio 2010 release yesterday and converted my VS 2008 projects. I also have installed .NET Framework 4 on my virtual machine. Before yesterday all my projects were building succesfully on the CI server but since I installed VS 2010 I get the following error message : error MSB5014: File format version is not recognized. MSBuild can only read solution files between versions 7.0 and 9.0, inclusive. I did change my config on Team City to take into account the new .NET 4 framework : Build Runner : MSBuild Build File Path : CFT.msbuild MSBuild version : Microsoft.NET Framework 4.0 MSBuild ToolsVersion : 4.0 Run Platform : x86 I think it has something to do with the fact that now MSBuild must refer to .NET 4 framwork but it seems that it keeps refering to 2.0.

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• Output of gcc -fdump-tree-original

  - by Job

  If I dump the code generated by GCC for a virtual destructor (with -fdump-tree-original), I get something like this: ;; Function virtual Foo::~Foo() (null) ;; enabled by -tree-original { <<cleanup_point <<< Unknown tree: expr_stmt (void) (((struct Foo *) this)->_vptr.Foo = &_ZTV3Foo + 8) >>> >>; } <D.20148>:; if ((bool) (__in_chrg & 1)) { <<cleanup_point <<< Unknown tree: expr_stmt operator delete ((void *) this) >>> >>; } My question is: where is the code after "<D.20148>:;" located? It is outside of the destructor so when is this code executed?

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• Communicating with the PC via USB connection in Android

  - by Danny Singh

  I'm fairly new to android programming and need some information for a 4th year forensics course project. Basically I am trying to create a suite of tools for live analysis of an android phone. I know how to get the information I need on the phone, but I was wondering if there was a way to communicate that information back to the PC? I want to be able to run a program from a PC, which, when the phone is docked, will allow the user to access information about the phone (ie currently running services/processes, bluetooth/wifi connections, etc). I have a bunch of methods that will run on the phone and get all the information, but I want to be able to call those methods from the PC, execute on the phone, then have the information sent back to the PC to display to the user instead of just displaying it on the phone. This is to leave as small a footprint on the phone as possible. Thanks a lot.

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• A definitive guide to Url Encoding in ASP .NET

  - by cbp

  I am starting to realise that there are about a bazillion different methods for encoding urls in .NET. I keep finding new ones. They all work slightly differently, but they all have essentially the same summary comments. Does anyone have a definitive matrix that shows the exact differences between the following methods: HttpUtility.UrlEncode HttpUtility.UrlPathEncode Server.UrlEncode Uri.EscapeUriString Uri.EscapeDataString ... are they any more? Also it would be good to match these up with use-cases e.g.: Urls in href attributes of a tags Urls to be displayed to the user in HTML Urls as querystring values (i.e. to be sent in GET requests) Urls to be sent in POST requests etc

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• Eclipse + Git: Can't add files to my repository

  - by Stegeman

  I use Eclipse (Helios) with PDT and egit. I have a project without versioning, so I created a git repository for it by doing: Team -> Share Project When I try to add the files of my project to the repository: Team -> Add I get an exception: Failed to add resource to index Failed to add resource to index Exception caught during execution of add command When I add the files manually on the command line, everything is working fine. Any ideas? EDIT: The error eclipse gives is: Caused by: org.eclipse.jgit.errors.ObjectWritingException: Unable to create new object: Z:\eage_layout\.git\objects\60\f30dd232bd6ddaeb198fb11400c2613a072189 at org.eclipse.jgit.storage.file.ObjectDirectoryInserter.insert(ObjectDirectoryInserter.java:100) at org.eclipse.jgit.api.AddCommand.call(AddCommand.java:177) The code I'm running is located on a virtual machine running on CentOs. I'm working on a windows machine and using a samba share to get access to the code on the virtual machine. I've put the filesystem permissions on my .git directory to 777, but still it does not work.

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• Linux, static lib referring to other static lib within an executable

  - by andras

  Hello, I am creating an application, which consists of two static libs and an executable. Let's call the two static libs: libusefulclass.a libcore.a And the application: myapp libcore instantiates and uses the class defined in libusefulclass (let's call it UsefulClass) Now, if I link the application in the following way: g++ -m64 -Wl,-rpath,/usr/local/Trolltech/Qt-4.5.4/lib -o myapp src1.o src2.o srcN.o -lusefulclass -lcore The linker complains about the methods in libusefulclass not being found: undefined reference to `UsefulClass::foo()' etc. I found a workaround for this: If UsefulClass is also instantiated within the source files of the executable itself, the application is linked without any problems. My question is: is there a more clean way to make libcore refer to methods defined in libusefulclass, or static libs just cannot be linked against eachother? TIA P.S.: In case that matters: the application is being developed in C++ using Qt, but I feel this is not a Qt problem, but a library problem in general.

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• Objective-C Pointer to class that implements a protocol

  - by Winder

  I have three classes which implement the same protocol, and have the same parent class which doesn't implement the protocol. Normally I would have the protocol as pure virtual functions in the parent class but I couldn't find an Objective-C way to do that. How can I utilize polymorphism on these subclasses and call the functions implemented in the protocol without warnings? Some pseudocode if that didn't make sense: @interface superclass: NSObject {} @interface child1: superclass<MyProtocol> {} @interface child2: superclass<MyProtocol> {} The consumer of these classes: @class child1 @class child2 @class superclass @interface SomeViewController: UIViewController { child1 *oneView; child2 *otherView; superclass *currentView; } -(void) someMethod { [currentView protocolFunction]; } The only nice way I've found to do pure virtual functions in Objective-C is a hack by putting [self doesNotRecognizeSelector:_cmd]; in the parent class, but it isn't ideal.

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• iPhone to iPhone communication

  - by Dan

  Hi, I have been looking into communication methods between two iPhone devices and as I understand it there are two main methods to do this: Bluetooth and WiFi. However I wanted to know if anyone knows of any other way of sharing information between two iPhones? If I were in an area with no WiFi or mobile signal, and couldn't use Bluetooth for whatever reason, is there anything that could be done to broadcast data from one iPhone to another? I'm sure its a bit of a silly question, but if you don't ask, you don't get; and if someone knows of anything I might be able to look into with regards to this, I would be very appreciative. Thanks, Dan

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• Identify which AlertDialog triggered onClick(DialogInterface dialog, int which)

  - by Kurian

  I'm creating a dialog as follows: @Override protected Dialog onCreateDialog(int id) { switch (id) { case DIALOG_1: return new AlertDialog.Builder(this) .setTitle(R.string.s_dlg1) .setPositiveButton(android.R.string.ok, this) .create(); case DIALOG_2: ... ... } return null; } @Override public void onClick(DialogInterface dialog, int whichButton) { if (dialog == ???) { ... } else if (dialog == ???){ ... } } How do I identify which dialog triggered the onClick method? I can't declare the interface methods as in-line when creating the dialog because I want to access variables in my class. Every other interface passes some sort of id to its methods to identify which object called the method, but I can't seem to do anything with 'DialogInterface dialog'.

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• How do you set a variable value from another form?

  - by flavour404

  Hi, c# .Net 3.5 visual studio 2008, windows xp I have a main form in a project, given a specific set of circumstances another form is instantiated and displayed to the user: Form frmT = new frmTargetFolder(expName, this); frmT.Show(); As you can see, I am passing a reference to the new form from the current one. My question is, what do I have to do to a method so that it is exposed to the new form, the same for a variable? I have tried defining the functions as public, but I can't seem to access them, also I have written a Get and Set method for a variable, again how do I expose these functions and methods to other forms? public void hit() { MessageBox.Show("hit it"); } bool setOverRide { get { return OverRide; } set { OverRide = value; } } The main form is called frmDataXfer and the form, form which I am trying to call the functions and methods of frmDataXfer is called frmTargetFolder, an instance of which is created in the frmDataXfer and referenced as frmT. Thanks, R.

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• How to disable Events for a while in Javascript or jQuery

  - by Tarik

  Hello, I am wondering if you guys know different approach to disable an event for a while. Let me elaborate this more : Lets say I have a div or button which has a subscriber to its onclick event. To prevent the double click when the the methods are doing some ajax things, these are the some of the ways we can do : Disable the button till the method finishes its job Unbind till the methods finishes its job and then bind it again. Use some kind of flagging system like boolean so it will prevent method from working more than once. So is there any other ways, maybe some javascript tricks or jQuery tricks which is more efficient and better practice. Thanks in advance.

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• How can a Delphi TForm / TPersistent object calculate its own deserialization time?

  - by mjustin

  For performance tests I need a way to measure the time needed for a form to load its definition from the DFM. All existing forms inherit a custom form class. To capture the current time, this base class needs overriden methods as "extension points": start of the deserialization process after the deserialization (can be implemented by overriding the Loaded procedure) the moment just before the execution of the OnFormCreate event So the log for TMyForm.Create(nil) could look like: - 00.000 instance created - 00.010 before deserialization - 01.823 after deserialization - 02.340 before OnFormCreate Which TObject (or TComponent) methods are best suited? Maybe there are other extension points in the form creation process, please feel free to make suggestions.

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• C# can I lock a method parameter?

  - by 5YrsLaterDBA

  We have a class variable ArrayList binaryScanData in a class. In all methods having access to it, we put lock(binaryScanData) on it because it is shared. Now we want to move one of those methods out to another util class to make it a static method. We will pass that binaryScanData into the method like this: public static void convertAndSaveRawData(ref MemoryStream output, ref ArrayList binaryScanData) Our questions are followed: how can we sychoronize that binaryScanData? can we do the same as it is originally? ref is necessary? It will only be read in that convertAndSaveRawData method.

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• Terminal services and memory limits

  - by Mark Wassell

  Is there a way in Terminal Services to set limits on memory related parameters for a process. For example working set size and, possibly, if it makes sense, total virtual memory allocation for the session? To turn the question around, we have an application which cannot allocate as much virtual memory running on a terminal server as it can when running on a desktop PC (both I would expect to have a limit of 2GB for user mode address space) and I was wondering if there is another limit for processes or users on a terminal server. Perhaps even 2GB per user rather than per process.

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• Rename parameter in a WCF client interface

  - by user295479

  Hello everyone, I was wondering if there is a way to rename a parameter in a WCF client interface method ,just the same way I can rename methods or enumerations: Renaming methods: [System.Runtime.Serialization.DataMemberAttribute(Name = "intError")] public int ErrorCode {...} Renaming enumerations: public enum MyEnumeration: int { [System.Runtime.Serialization.EnumMemberAttribute()] None = 0, [System.Runtime.Serialization.EnumMemberAttribute(Value = "FirstOption")] First= 1, [System.Runtime.Serialization.EnumMemberAttribute()] SecondOption= 2, } Renaming parameters?? I want to rename an interface parameter named "error" which FxCop doesn't like. Any help will be appreciated. Thank you.

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• MVC2: Best Way to Intercept ViewRequest and Alter ActionResult

  - by Matthew

  I'm building an ASP.NET MVC2 Web Application that requires some sophisticated authentication and business logic that cannot be achieved using the out of the box forms authentication. I'm new to MVC so bear with me... My plan was to mark all restricted View methods with one or more custom attributes (that contain additional data). The controller would then override the OnActionExecuting method to intercept requests, analyze the target view's attributes, and do a variety of different things, including re-routing the user to different places. I have the interception and attribute analysis working, but the redirection is not working as expected. I have tried setting the ActionExecutingContext.Result to null and even have tried spooling up controllers via reflection and invoking their action methods. No dice. I was able to achieve it this way... protected override void OnActionExecuting(ActionExecutingContext filterContext) { filterContext.HttpContext.Response.Redirect("/MyView", false); base.OnActionExecuting(filterContext); } This seems like a hack, and there has to be a better way...

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• Windows CE 5.0 emulator needed

  - by Heinzi

  I need an emulator for Windows CE 5.0 to test an embedded device (not PDA or smartphone) application that I am developing. This is what I have already tried: Visual Studio 2008 Pro includes an emulator. Unfortunately, it does not include a Windows CE image (only Windows Mobile and Smartphone). Yes, there is a difference, see the screenshots here. Windows CE includes a "start button", windows that can be minimized, moved around etc. There is a Windows CE Device Emulator available from Microsoft. Apart from the fact that its license only permits non-commercial use, it does not run in Windows 7 (it requires .net Framework 1.1, which is incompatible with Windows 7) nor in Windows XP mode (error message: "Emulator for Windows CE will not run one virtual machine within another. Please run the virtual machine on the host operating system"). Is there any option that I have missed?

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• Is it possible to implement X-HTTP-Method-Override in ASP.NET MVC?

  - by Greg Beech

  I'm implementing a prototype of a RESTful API using ASP.NET MVC and apart from the odd bug here and there I've achieve all the requirements I set out at the start, apart from callers being able to use the X-HTTP-Method-Override custom header to override the HTTP method. What I'd like is that the following request... GET /someresource/123 HTTP/1.1 X-HTTP-Method-Override: DELETE ...would be dispatched to my controller method that implements the DELETE functionality rather than the GET functionality for that action (assuming that there are multiple methods implementing the action, and that they are marked with different [AcceptVerbs] attributes). So, given the following two methods, I would like the above request to be dispatched to the second one: [ActionName("someresource")] [AcceptVerbs(HttpVerbs.Get)] public ActionResult GetSomeResource(int id) { /* ... */ } [ActionName("someresource")] [AcceptVerbs(HttpVerbs.Delete)] public ActionResult DeleteSomeResource(int id) { /* ... */ } Does anybody know if this is possible? And how much work would it be to do so...?

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• How can a Delphi TForm / TPersistent object calculate its own construction and deserialization time?

  - by mjustin

  For performance tests I need a way to measure the time needed for a form to load its definition from the DFM. All existing forms inherit a custom form class. To capture the current time, this base class needs overriden methods as "extension points": start of the deserialization process after the deserialization (can be implemented by overriding the Loaded procedure) the moment just before the execution of the OnFormCreate event So the log for TMyForm.Create(nil) could look like: - 00.000 instance created - 00.010 before deserialization - 01.823 after deserialization - 02.340 before OnFormCreate Which TObject (or TComponent) methods are best suited? Maybe there are other extension points in the form creation process, please feel free to make suggestions. Background: for some of our app forms which have a very basic structure (with some PageControls and QuantumGrids) I realized that it is not database access and other stuff in OnFormShow but the construction which took most of the time (around 2 seconds) which makes me wonder where this time is spent. As a reference object I will also build a mock form which has a similar structure but no code or datamodule connections and measure its creation time.

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