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  • Serializing network messages

    - by mtsvetkov
    I am writing a network wrapper around boost::asio and was wondering what is a good and simple way to serialize my messages. I have a message factory which can take care of dispatching the data to the correct builder, but I want to know if there are any established solutions for getting the binary data on the sender side and consequently passing the data for deserialization on the receiver end. Some options I've explored are: passing a pointer to a char[] to the serialize/deserialize functions (for serialize to write to, and deserialize to read from), but it's difficult to enforce buffer size this way; building on that, I decided to have the serialize function return a boost::asio::mutable_buffer, however ownership of the memory gets blurred between multiple classes, as the network wrapper needs to clean up the memory allocated by the message builder. I have also seen solutions involving streambuf's and stringstream's, but manipulating binary data in terms of its string representation is something I want to avoid. Is there some sort of binary stream I can use instead? What I am looking for is a solution (preferrably using boost libs) that lets the message builder dictate the amount of memory allocated during serialization and what that would look like in terms of passing the data around between the wrapper and message factory/message builders. PS. Messages contain almost exclusively built-in types and PODs and form a shallow but wide hierarchy for the sake of going through a factory. Note: a link to examples of using boost::serialization for something like this would be appreciated as I'm having difficulties figuring out the relation between it and buffers.

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  • WSUS appears to be functioning, however errors are reported in Application Log (DSS Authentication W

    - by Richard Slater
    I re-installed WSUS a few months ago on a new server as part of a server hardware refresh. It is functioning normally downloading, authorizing and supplying patches to workstations. System Specification: HP DL360 G5 Quad 2.5 Zeon 6GB RAM Not Virtualized WSUS 3.2.7600.3226 SQL 2005 Express Windows 2003 R2 SP2 WSS SSL Enabled Every six hours five events are logged to the Application Event Log: Source | Category | ID | Description -------------------------------------------------------------------------------------- Windows Server Update Services | Web Services | 12052 | The DSS Authentication Web Service is not working. Windows Server Update Services | Web Services | 12042 | The SimpleAuth Web Service is not working Windows Server Update Services | Web Services | 12022 | The Client Web Service is not working Windows Server Update Services | Web Services | 12032 | The Server Synchronization Web Service is not working Windows Server Update Services | Web Services | 12012 | The API Remoting Web Service is not working In addition the following .NET Stack Trace is logged in C:\Program Files\Update Services\LogFiles\SoftwareDistribution.log each stack trace is identical except for the names of the services: 2009-11-27 11:56:52.757 UTC Error WsusService.10 HmtWebServices.CheckApiRemotingWebService ApiRemoting WebService WebException:System.Net.WebException: The request failed with HTTP status 403: Forbidden. at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) at Microsoft.UpdateServices.Internal.ApiRemoting.Ping(Int32 pingLevel) at Microsoft.UpdateServices.Internal.HealthMonitoring.HmtWebServices.CheckApiRemotingWebService(EventLoggingType type, HealthEventLogger logger) at Microsoft.UpdateServices.Internal.HealthMonitoring.HmtWebServices.CheckApiRemotingWebService(EventLoggingType type, HealthEventLogger logger) at Microsoft.UpdateServices.Internal.HealthMonitoring.HealthMonitoringTasks.ExecuteSubtask(HealthMonitoringSubtask subtask, EventLoggingType type, HealthEventLogger logger) at Microsoft.UpdateServices.Internal.HealthMonitoring.HmtWebServices.Execute(EventLoggingType type) at Microsoft.UpdateServices.Internal.HealthMonitoring.HealthMonitoringTasks.Execute(EventLoggingType type) at Microsoft.UpdateServices.Internal.HealthMonitoring.HealthMonitoringThreadManager.Execute(Boolean waitIfNecessary, EventLoggingType loggingType) at Microsoft.UpdateServices.Internal.HealthMonitoring.RemotingChannel.PrivateLogEvents() at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]& outArgs) at System.Runtime.Remoting.Messaging.StackBuilderSink.SyncProcessMessage(IMessage msg, Int32 methodPtr, Boolean fExecuteInContext) at System.Runtime.Remoting.Messaging.ServerObjectTerminatorSink.SyncProcessMessage(IMessage reqMsg) at System.Runtime.Remoting.Lifetime.LeaseSink.SyncProcessMessage(IMessage msg) at System.Runtime.Remoting.Messaging.ServerContextTerminatorSink.SyncProcessMessage(IMessage reqMsg) at System.Runtime.Remoting.Channels.CrossContextChannel.SyncProcessMessageCallback(Object[] args) at System.Runtime.Remoting.Channels.ChannelServices.DispatchMessage(IServerChannelSinkStack sinkStack, IMessage msg, IMessage& replyMsg) at System.Runtime.Remoting.Channels.SoapServerFormatterSink.ProcessMessage(IServerChannelSinkStack sinkStack, IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream, IMessage& responseMsg, ITransportHeaders& responseHeaders, Stream& responseStream) at System.Runtime.Remoting.Channels.BinaryServerFormatterSink.ProcessMessage(IServerChannelSinkStack sinkStack, IMessage requestMsg, ITransportHeaders requestHeaders, Stream requestStream, IMessage& responseMsg, ITransportHeaders& responseHeaders, Stream& responseStream) at System.Runtime.Remoting.Channels.Ipc.IpcServerTransportSink.ServiceRequest(Object state) at System.Runtime.Remoting.Channels.SocketHandler.ProcessRequestNow() at System.Runtime.Remoting.Channels.SocketHandler.BeginReadMessageCallback(IAsyncResult ar) at System.Runtime.Remoting.Channels.Ipc.IpcPort.AsyncFSCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOverlapped) at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP) So far I have tried the following: Ensuring the settings were accurate as per TechNet. Checked that there was a suitable binding to 127.0.0.1 binding in IIS. Gone through and checked the settings in IIS as per TechNet. I have discovered that you can run the command wsusutil checkhealth to force the healt check to run, wsusutil can be found in C:\Program Files\Update Services\Tools. When this executese it will tell you to check the application log.

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  • Permission denied install Joomla CiviCRM

    - by Tim
    Dear All, I am trying to install CiviCRM on a Joomla 1.5.17 web server running Ubuntu 9.10. Uploading the package to the tmp directory in /var/www/[site name]/tmp and installing creates this error: Warning: fopen(/var/www/trbcp/administrator/components/com_civicrm/civicrm/templates/CRM/common/civicrm.settings.php.tpl) [function.fopen]: failed to open stream: Permission denied in /var/www/trbcp/libraries/joomla/filesystem/file.php on line 240 Warning: fopen(/var/www/trbcp/administrator/components/com_civicrm/civicrm/templates/CRM/common/civicrm.settings.php.tpl) [function.fopen]: failed to open stream: Permission denied in /var/www/trbcp/libraries/joomla/filesystem/file.php on line 240 Warning: include_once(/var/www/trbcp/administrator/components/com_civicrm/civicrm.settings.php) [function.include-once]: failed to open stream: Permission denied in /var/www/trbcp/administrator/components/com_civicrm/configure.php on line 115 Warning: include_once() [function.include]: Failed opening '/var/www/trbcp/administrator/components/com_civicrm/civicrm.settings.php' for inclusion (include_path='.') in /var/www/trbcp/administrator/components/com_civicrm/configure.php on line 115 Warning: require_once(DB.php) [function.require-once]: failed to open stream: No such file or directory in /var/www/trbcp/administrator/components/com_civicrm/configure.php on line 140 Fatal error: require_once() [function.require]: Failed opening required 'DB.php' (include_path='.') in /var/www/trbcp/administrator/components/com_civicrm/configure.php on line 140 Initially I got a permissions denied error and thought that Joomla did not have permissions to all its directories but looking at Help-System information all the necessary directories are writable. I then decided to chmod 777 all the directories and try again but it still fails. Looking at the directories afterwards it seems that the new directories being created are not being created 777. By changing them I can get at least one step further before the error appears again. My question is does anyone know how to get round this? I am thinking that the new directories being created will require sudo privileges to have mv and create actions carried out, hence the permission denied errors. Can this be configured in Joomla? Or is there a way to specify that new directories created in /var/www/[site name] take 777 by default? any help greatly appreciated! EDIT: P.S. if anyone could give me a clue as to how the insert code feature works as well that would be great! Might make this post a bit more readable! EDIT2: Well I have had a bash at changing the permissions and ownership. sudo chown -R www-data:www-data /var/www/trbcp I then tried changing the whole /var directory (insecure I know but this is a test and dev server for me to find my feet on) to 777 and still getting permission errors. It seems to be error opening stream? Not a php guy so not sure what that is but could it be that permissions to run php script need to change? any thoughts greatly appreciated.

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  • Concatenation of a 2 second silence audio with a normal audio not working

    - by user1665130
    I have a code for concatenation of files using ffmpeg.Here silence.wav is a mute audio file with 2 seconds length. I need to prepend this mut audio file to REC00096_Jun-06-2014 16.47.28.wav. I tried the folowing code. ffmpeg -i D:\vishnu\silence.wav -i D:\vishnu\REC00096_Jun-06-2014 16.47.28.wav \-filter_complex '[0:0][1:0][2:0][3:0]concat=n=2:v=0:a=1[out]' \-map '[out]' output.wav Following is the error i am getting. D:\vishnu>ffmpeg -i silence.wav -i "D:\vishnu\REC00096_Jun-06-2014 16.47.28.wav" -filter_complex '[0:0][1:0][2:0][3:0]concat=n=2:v=0:a=1[out]' -map '[out]' outp ut.wav ffmpeg version N-59036-g5d8e4f6 Copyright (c) 2000-2013 the FFmpeg developers built on Dec 12 2013 22:01:01 with gcc 4.8.2 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aa cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavp ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib libavutil 52. 58.100 / 52. 58.100 libavcodec 55. 45.101 / 55. 45.101 libavformat 55. 22.100 / 55. 22.100 libavdevice 55. 5.102 / 55. 5.102 libavfilter 3. 92.100 / 3. 92.100 libswscale 2. 5.101 / 2. 5.101 libswresample 0. 17.104 / 0. 17.104 libpostproc 52. 3.100 / 52. 3.100 Input #0, wav, from 'silence.wav': Metadata: encoder : Lavf55.22.100 Duration: 00:00:02.02, bitrate: 4234 kb/s Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 5.1, s16, 4 233 kb/s Guessed Channel Layout for Input Stream #1.0 : mono Input #1, wav, from 'D:\vishnu\REC00096_Jun-06-2014 16.47.28.wav': Duration: 00:00:08.04, bitrate: 384 kb/s Stream #1:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 24000 Hz, mono, s16, 384 kb/s [wav @ 036f5e40] Invalid stream specifier: '[out]'. Last message repeated 1 times Stream map ''[out]'' matches no streams. D:\vishnu>

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  • <msbuild/> task fails while <devenv/> succeeds for MFC application in CruiseControl.NET?

    - by ee
    The Overview I am working on a Continuous Integration build of a MFC appliction via CruiseControl.net and VS2010. When building my .sln, a "Visual Studio" CCNet task (<devenv/>) works, but a simple MSBuild wrapper script (see below) run via the CCNet <msbuild/> task fails with errors like: error RC1015: cannot open include file 'winres.h'.. error C1083: Cannot open include file: 'afxwin.h': No such file or directory error C1083: Cannot open include file: 'afx.h': No such file or directory The Question How can I adjust the build environment of my msbuild wrapper so that the application builds correctly? (Pretty clearly the MFC paths aren't right for the msbuild environment, but how do i fix it for MSBuild+VS2010+MFC+CCNet?) Background Details We have successfully upgraded an MFC application (.exe with some MFC extension .dlls) to Visual Studio 2010 and can compile the application without issue on developer machines. Now I am working on compiling the application on the CI server environment I did a full installation of VS2010 (Professional) on the build server. In this way, I knew everything I needed would be on the machine (one way or another) and that this would be consistent with developer machines. VS2010 is correctly installed on the CI server, and the devenv task works as expected I now have a wrapper MSBuild script that does some extended version processing and then builds the .sln for the application via an MSBuild task. This wrapper script is run via CCNet's MSBuild task and fails with the above mentioned errors The Simple MSBuild Wrapper <?xml version="1.0" encoding="utf-8"?> <Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> <Target Name="Build"> <!-- Doing some versioning stuff here--> <MSBuild Projects="target.sln" Properties="Configuration=ReleaseUnicode;Platform=Any CPU;..." /> </Target> </Project> My Assumptions This seems to be a missing/wrong configuration of include paths to standard header resources of the MFC persuasion I should be able to coerce the MSBuild environment to consider the relevant resource files from my VS2010 install and have this approach work. Given the vs2010 msbuild support for visual c++ projects (.vcxproj), shouldn't msbuilding a solution be pretty close to compiling via visual studio? But how do I do that? Am I setting Environment variables? Registry settings? I can see how one can inject additional directories in some cases, but this seems to need a more systemic configuration at the compiler defaults level. Update 1 This appears to only ever happen in two cases: resource compilation (rc.exe), and precompiled header (stdafx.h) compilation, and only for certain projects? I was thinking it was across the board, but indeed it appears only to be in these cases. I guess I will keep digging and hope someone has some insight they would be willing to share...

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  • Solution to Jira web service getWorklogs method error: Object of type System.Xml.XmlNode[] cannot be stored in an array of this type

    - by DigiMortal
    When using Jira web service methods that operate on work logs you may get the following error when running your .NET application: Object of type System.Xml.XmlNode[] cannot be stored in an array of this type. In this posting I will show you solution to this problem. I don’t want to go to deep in details about this problem. I think it’s enough for this posting to mention that this problem is related to one small conflict between .NET web service support and Axis. Of course, Jira team is trying to solve it but until this problem is solved you can use solution provided here. There is good solution to this problem given by Jira forum user Kostadin. You can find it from Jira forum thread RemoteWorkLog serialization from Soap Service in C#. Solution is simple – you have to use SOAP extension class to replace new class names with old ones that .NET found from WSDL. Here is the code by Kostadin. public class JiraSoapExtensions : SoapExtension {     private Stream _streamIn;     private Stream _streamOut;       public override void ProcessMessage(SoapMessage message)     {         string messageAsString;         StreamReader reader;         StreamWriter writer;           switch (message.Stage)         {             case SoapMessageStage.BeforeSerialize:                 break;             case SoapMessageStage.AfterDeserialize:                 break;             case SoapMessageStage.BeforeDeserialize:                 reader = new StreamReader(_streamOut);                 writer = new StreamWriter(_streamIn);                 messageAsString = reader.ReadToEnd();                 switch (message.MethodInfo.Name)                 {                     case "getWorklogs":                     case "addWorklogWithNewRemainingEstimate":                     case "addWorklogAndAutoAdjustRemainingEstimate":                     case "addWorklogAndRetainRemainingEstimate":                         messageAsString = messageAsString.                             .Replace("RemoteWorklogImpl", "RemoteWorklog")                             .Replace("service", "beans");                         break;                 }                 writer.Write(messageAsString);                 writer.Flush();                 _streamIn.Position = 0;                 break;             case SoapMessageStage.AfterSerialize:                 _streamIn.Position = 0;                 reader = new StreamReader(_streamIn);                 writer = new StreamWriter(_streamOut);                 messageAsString = reader.ReadToEnd();                 writer.Write(messageAsString);                 writer.Flush(); break;         }     }       public override Stream ChainStream(Stream stream)     {         _streamOut = stream;         _streamIn = new MemoryStream();         return _streamIn;     }       public override object GetInitializer(Type type)     {         return GetType();     }       public override object GetInitializer(LogicalMethodInfo info,         SoapExtensionAttribute attribute)     {         return null;     }       public override void Initialize(object initializer)     {     } } To get this extension work with Jira web service you have to add the following block to your application configuration file (under system.web section). <webServices>   <soapExtensionTypes>    <add type="JiraStudioExperiments.JiraSoapExtensions,JiraStudioExperiments"           priority="1"/>   </soapExtensionTypes> </webServices> Weird thing is that after successfully using this extension and disabling it everything still works.

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  • Webpage loading with wrong content-type after setting up CloudFlare

    - by Daniel Little
    I recently migrated my blog to the Ghost service, I've also setup an alias DNS record with CloudFlare. While showing the blog to a colleague I discovered one of the posts wasn't loading properly and would instead prompt to be downloaded with an application/octet-stream content-type. I can view all the pages without any issues and I believe we're both on the same network as well. Has anyone received a wrong content type like application/octet-stream using CloudFlare, or know what I can do to correct this?

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  • Binding MediaElement to a ViewModel in a Windows 8 Store App

    - by jdanforth
    If you want to play a video from your video-library in a MediaElement control of a Metro Windows Store App and tried to bind the Url of the video file as a source to the MediaElement control like this, you may have noticed it’s not working as well for you: <MediaElement Source="{Binding Url}" /> I have no idea why it’s not working, but I managed to get it going using  ContentControl instead: <ContentControl Content="{Binding Video}" /> The code behind for this is: protected override void OnNavigatedTo(NavigationEventArgs e) {     _viewModel = new VideoViewModel("video.mp4");     DataContext = _viewModel; } And the VideoViewModel looks like this: public class VideoViewModel {     private readonly MediaElement _video;     private readonly string _filename;       public VideoViewModel(string filename)     {         _filename = filename;         _video = new MediaElement { AutoPlay = true };         //don't load the stream until the control is ready         _video.Loaded += VideoLoaded;     }       public MediaElement Video     {         get { return _video; }     }       private async void VideoLoaded(object sender, RoutedEventArgs e)     {         var file = await KnownFolders.VideosLibrary.GetFileAsync(_filename);         var stream = await file.OpenAsync(FileAccessMode.Read);         _video.SetSource(stream, file.FileType);     } } I had to wait for the MediaElement.Loaded event until I could load and set the video stream.

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  • What to do with a site that has multiple languages in Google Analytics...

    - by stephmoreland
    We have a site that has four "streams" for language and each language has different content based on that language and location (US English, Spanish, Canadian English and Canadian French). I'm wondering if I have to set up accounts for each stream so that we can see the stats from each stream only, or do I use one account and somehow tell GA to separate the different streams based on language. For example, the US English site starts at (/en/) while the Canadian English site starts at (/ca_en/), etc.

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  • A Simple Entity Tagger

    - by Elton Stoneman
    In the REST world, ETags are your gateway to performance boosts by letting clients cache responses. In the non-REST world, you may also want to add an ETag to an entity definition inside a traditional service contract – think of a scenario where a consumer persists its own representation of your entity, and wants to keep it in sync. Rather than load every entity by ID and check for changes, the consumer can send in a set of linked IDs and ETags, and you can return only the entities where the current ETag is different from the consumer’s version.  If your entity is a projection from various sources, you may not have a persistent ETag, so you need an efficient way to generate an ETag which is deterministic, so an entity with the same state always generates the same ETag. I have an implementation for a generic ETag generator on GitHub here: EntityTagger code sample. The essence is simple - we get the entity, serialize it and build a hash from the serialized value. Any changes to either the state or the structure of the entity will result in a different hash. To use it, just call SetETag, passing your populated object and a Func<> which acts as an accessor to the ETag property: EntityTagger.SetETag(user, x => x.ETag); The implementation is all in at 80 lines of code, which is all pretty straightforward: var eTagProperty = AsPropertyInfo(eTagPropertyAccessor); var originalETag = eTagProperty.GetValue(entity, null); try { ResetETag(entity, eTagPropertyAccessor); string json; var serializer = new DataContractJsonSerializer(entity.GetType()); using (var stream = new MemoryStream()) { serializer.WriteObject(stream, entity); json = Encoding.UTF8.GetString(stream.GetBuffer(), 0, (int)stream.Length); } var guid = GetDeterministicGuid(json); eTagProperty.SetValue(entity, guid.ToString(), null); //... There are a couple of helper methods to check if the object has changed since the ETag value was last set, and to reset the ETag. This implementation uses JSON to do the serializing rather than XML. Benefit - should be marginally more efficient as your hashing a much smaller serialized string; downside, JSON doesn't include namespaces or class names at the root level, so if you have two classes with the exact same structure but different names, then instances which have the same content will have the same ETag. You may want that behaviour, but change to use the XML DataContractSerializer if you think that will be an issue. If you can persist the ETag somewhere, it will save you server processing to load up the entity, but that will only apply to scenarios where you can reliably invalidate your ETag (e.g. if you control all the entry points where entity contents can be updated, then you can calculate and persist the new ETag with each update).

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  • winforms databinding best practices

    - by Kaiser Soze
    Demands / problems: I would like to bind multiple properties of an entity to controls in a form. Some of which are read only from time to time (according to business logic). When using an entity that implements INotifyPropertyChanged as the DataSource, every change notification refreshes all the controls bound to that data source (easy to verify - just bind two properties to two controls and invoke a change notification on one of them, you will see that both properties are hit and reevaluated). There should be user friendly error notifications (the entity implements IDataErrorInfo). (probably using ErrorProvider) Using the entity as the DataSource of the controls leads to performance issues and makes life harder when its time for a control to be read only. I thought of creating some kind of wrapper that holds the entity and a specific property so that each control would be bound to a different DataSource. Moreover, that wrapper could hold the ReadOnly indicator for that property so the control would be bound directly to that value. The wrapper could look like this: interface IPropertyWrapper : INotifyPropertyChanged, IDataErrorInfo { object Value { get; set; } bool IsReadOnly { get; } } But this means also a different ErrorProvider for each property (property wrapper) I feel like I'm trying to reinvent the wheel... What is the 'proper' way of handling complex binding demands like these? Thanks ahead.

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  • Boost.Python wrapping hierarchies avoiding diamond inheritance

    - by stbuton
    I'm having some trouble seeing what the best way to wrap a series of classes with Boost.Python while avoiding messy inheritance problems. Say I have the classes A, B, and C with the following structure: struct A { virtual void foo(); virtual void bar(); virtual void baz(); }; struct B : public A { virtual void quux(); }; struct C : public A { virtual void foobar(); }; I want to wrap all classes A, B, and C such that they are extendable from Python. The normal method for accomplishing this would be along the lines of: struct A_Wrapper : public A, boost::python::wrapper<A> { //dispatch logic for virtual functions }; Now for classes B and C which extend from A I would like to be able to inherit and share the wrapping implementation for A. So I'd like to be able to do something along the lines of: struct B_Wrapper : public B, public A_Wrapper, public boost::python::wrapper<B> { //dispatch logic specific for B }; struct C_Wrapper : public C, public A_Wrapper, public boost::python::wrapper<C> { //dispatch logic specific for C } However, it seems like that would introduce all manner of nastiness with the double inheritance of the boost wrapper base and the double inheritance of A in the B_Wrapper and C_Wrapper objects. Is there a common way that this instance is solved that I'm missing? thanks.

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  • Execute code on assembly load

    - by Dmitriy Matveev
    I'm working on wrapper for some huge unmanaged library. Almost every of it's functions can call some error handler deeply inside. The default error handler writes error to console and calls abort() function. This behavior is undesirable for managed library, so I want to replace the default error handler with my own which will just throw some exception and let program continue normal execution after handling of this exception. The error handler must be changed before any of the wrapped functions will be called. The wrapper library is written in managed c++ with static linkage to wrapped library, so nothing like "a type with hundreds of dll imports" is present. I also can't find a single type which is used by everything inside wrapper library. So I can't solve that problem by defining static constructor in one single type which will execute code I need. I currently see two ways of solving that problem: Define some static method like Library.Initialize() which must be called one time by client before his code will use any part of the wrapper library. Find the most minimal subset of types which is used by every top-level function (I think the size of this subset will be something like 25-50 types) and add static constructors calling Library.Initialize (which will be internal in that scenario) to every of these types. I've read this and this questions, but they didn't helped me. Is there any proper ways of solving that problem? Maybe some nice hacks available?

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  • findViewById returns null in new Intent

    - by drozzy
    I am having a problem where in the started Intent, the findViewById returns null. Is there anything special I should know about starting a new intent? It goes something like this for me: //in the MainList class Intent stuffList = new Intent(this, StuffList.class); then in the new Stuff's constructor: public class StuffList extends ListActivity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); this.setContentView(R.layout.stuff_list); ... this.setListAdapter(new StuffAdapter(this, my_cursor)); and in the StuffAdapter I do my usual view and data retrieval. Note the line where findViewById returns null: class ViewWrapper{ View base; TextView label = null; ViewWrapper(View base){ this.base = base; } TextView getLabel(){ if(label == null){ label = (TextView)base.findViewById(R.id.my_label); // returns NULL } return label;} } class StuffAdapter extends CursorAdapter{ StuffAdapter(Context context, Cursor cursor){ super(context, cursor); } @Override public View newView(Context context, Cursor cursor, ViewGroup parent) { LayoutInflater inflater = getLayoutInflater(); View row = inflater.inflate(R.layout.stuff_list, parent, false); ViewWrapper wrapper = new ViewWrapper(row); row.setTag(wrapper); return(row); } @Override public void bindView(View row, Context context, Cursor cursor) { ViewWrapper wrapper = (ViewWrapper)row.getTag(); TextView label = wrapper.getLabel(); // also NULL //this throws exception of course label.setText(cursor.getString("title")); } } The curious thing is that in the class that calls intent (MainList class), I do Exactly the same thing (i list a bunch of objects), and it Works! however when I try to do it in an Intent - it can't seem to find the view by id.

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  • jQuery: find selector only works with IDs and not classes ?

    - by Patrick
    hi, does the "find" method work in jQuery with classes selectors ? For example: var tagsDiv = $(".node-form .taxonomy-super-select-checkboxes").find("div.fieldset-wrapper"); doesn't work. But var tagsDiv = $(".node-form .taxonomy-super-select-checkboxes").find("div#edit-taxonomy-tags-1-wrapper"); works. This is the html code: ... <fieldset class=" collapsible"> <legend class="collapse-processed"> <a href="#">Tags <span class="form-required" title="This field is required.">*</span> </a> </legend> <div class="fieldset-wrapper"> <div class="form-item" id="edit-taxonomy-tags-1-wrapper"> <label for="edit-taxonomy-tags-1">Enter New Tags: </label> </div> </div> </fieldset> ... thanks

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  • div content margin pushing container

    - by jef2904
    Hi, Im running into an issue that's really baffleing me. I have a container that I want to apply a background to an postion it in the top right of the browser screen. The div inside has a top margin of 4em and this is pushing the container div here is the CSS #container { background: transparent url("../images/house-bg.png") top right no-repeat scroll; } #wrapper { background: #FFF; width: 960px; height: 600px; margin: 4em auto 0; border: 10px solid #C3CF21; -moz-border-radius: 20px; -webkit-border-radius: 20px; border-radius: 20px; -moz-box-shadow: 0 0 25px #444; -webkit-box-shadow: 0 0 25px #444; box-shadow: 0 0 25px #444; } and heres the HTML <div id="container"> <div id="wrapper"> <div id="header"> </div> <div id="main"> </div> </div> <div id="footer"> &copy; Copyright <?php echo date("Y");?> Company, Inc. </div> </div> I want the margin of the wrapper to be inside the container div instead of outside. I've tried multiple display properties and position properties to no avail. The only thing that fixes it is inserting an "&nbsp;" before the start of the #wrapper but theres got to be a CSS fix to this. Thanks in Advanced, Jorge

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  • Unpacking varargin to individual variables

    - by Richie Cotton
    I'm writing a wrapper to a function that takes varargin as its inputs. I want to preserve the function signature in the wrapper, but nesting varargin causes all the variable to be lumped together. function inner(varargin) %#ok<VANUS> % An existing function disp(nargin) end function outer(varargin) % My wrapper inner(varargin); end outer('foo', 1:3, {}) % Uh-oh, this is 1 I need a way to unpack varargin in the outer function, so that I have a list of individual variables. There is a really nasty way to do this by constructing a string of the names of the variables to pass the inner, and calling eval. function outer2(varargin) %#ok<VANUS> % My wrapper, second attempt inputstr = ''; for i = 1:nargin inputstr = [inputstr 'varargin{' num2str(i) '}']; %#ok<AGROW> if i < nargin inputstr = [inputstr ', ']; %#ok<AGROW> end end eval(['inner(' inputstr ')']); end outer2('foo', 1:3, {}) % 3, as it should be Can anyone think of a less hideous way of doing things, please?

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  • Pattern for version-specific implementations of a Java class

    - by Mike Monkiewicz
    So here's my conundrum. I am programming a tool that needs to work on old versions of our application. I have the code to the application, but can not alter any of the classes. To pull information out of our database, I have a DTO of sorts that is populated by Hibernate. It consumes a data object for version 1.0 of our app, cleverly named DataObject. Below is the DTO class. public class MyDTO { private MyWrapperClass wrapper; public MyDTO(DataObject data) { wrapper = new MyWrapperClass(data); } } The DTO is instantiated through a Hibernate query as follows: select new com.foo.bar.MyDTO(t1.data) from mytable t1 Now, a little logic is needed on top of the data object, so I made a wrapper class for it. Note the DTO stores an instance of the wrapper class, not the original data object. public class MyWrapperClass { private DataObject data; public MyWrapperClass(DataObject data) { this.data = data; } public String doSomethingImportant() { ... version-specific logic ... } } This works well until I need to work on version 2.0 of our application. Now DataObject in the two versions are very similar, but not the same. This resulted in different sub classes of MyWrapperClass, which implement their own version-specific doSomethingImportant(). Still doing okay. But how does myDTO instantiate the appropriate version-specific MyWrapperClass? Hibernate is in turn instantiating MyDTO, so it's not like I can @Autowire a dependency in Spring. I would love to reuse MyDTO (and my dozens of other DTOs) for both versions of the tool, without having to duplicate the class. Don't repeat yourself, and all that. I'm sure there's a very simple pattern I'm missing that would help this. Any suggestions?

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  • JQuery dynamic .load - works for 1 and not for the other??

    - by Alvin
    UPDATE: Site is online http://qwickqual.com/memorial/create/ under "Memoria Media" - Click on "Our Videos" and it loads the list of categories click on any sub category and it goes through the process below ---------------- end edit ---------------------------------- UPDATED DESCRIPTION OF ERROR: All code is based on <li> objects being linked If I click on an <li> from the Initial page load to load: section 1: I can click on an <li> to load sub-categories section 2: I then click on an <li>, the query is made server returns section 3, section is not loaded to screen / and callback function is skipped over perhaps someone has run into a similar issue before?? ---------------- end edit ---------------------------------- I've also added comments to the code I have a jquery function that is setup to load categorized lists of thumbnails. So far the function is in use in 3 location. Each of them generates HTML using the same template under django. The function works perfectly in 2 of the 3 locations, and I"m plain stumped as to why the 3rd won't work. Below is the complete set of relevant javascript, the page load HTML for the relevant section. And 2 examples of HTML that is loaded through the script, 1 of them works, 1 of them doesn't and both are loaded into the same page load HTML Any ideas what I'm missing here? Or information I need to add to help debug? Currently posting this to a live server to interact with, been local only till now... Error: Script works properly through all levels of title="our_photos" Script loads 1st level of title="our_videos" Script will not load sub-category of title="our_videos" Example: From HTML below: Click on Script will query the server properly: GET http://localhost%3A8000/memorial/media%5Ftype/our%5Fvideos/4/ Script will not load the returned HTML into the #select_media div scopeChain: [Call, Call multi=false uri=/memorial/media_type/our_videos/, Window # 0=Call 1=Call 2=window] relative vars: label = "our_videos" wrapper = "media" uri = "/memorial/media_type/our_videos/" multi = false Javascript <script type="text/javascript"> // this piece is where I'm having trouble in the grand scheme of things // label = piece of class tag // wrapper = tag to load everything inside of // uri = base of the page to load // multi = not relevant for this piece but needed to pass on to next function function img_thumb_loader(label, wrapper, uri, multi) { if(!(wrapper)) { wrapper = label } $('.'+label+'_category').click(function () { // show the loading animation $('div#'+wrapper+'_load').show(); // get var of current object type = $(this).attr('title') || ''; // load it into the screen - this is the error // when I click on an <li> from section 2 below it will query server // (Tamper data & server see it - & return section 3 below // But will not load into the screen on return // also skips over the callback function $('#select_'+label).load(uri+type+'/', '', function() { $('div#'+wrapper+'_load').hide(); $('input.img_'+label+'_field').each(function() { img = $(this).attr('value'); $('li#img_'+label+'-'+img).css('selected_thumb'); }); img_thumb_selected(label); window[label+'_loader'](); }); }); $('.img_'+label).click(function () { if($(this).hasClass('selected_thumb')) { $(this).removeClass('selected_thumb'); id = $(this).attr('title'); $('.img_'+label+'_selected[value="'+id+'"]').remove(); } else { if(!(multi)) { previous = $('.img_'+label+'_selected').val(); $('#img_'+label+'-'+previous).removeClass('selected_thumb'); $('.img_'+label+'_selected').remove(); } $(this).addClass('selected_thumb'); id = $(this).attr('title'); $('#select_'+wrapper).after('<input class="img_'+label+'_selected" id="img_'+label+'_field-'+id+'" type="hidden" name="imgs[]" value="'+id+'" />'); } }); img_thumb_selected(label); } function img_thumb_selected(label) { $('.img_'+label+'_selected').each(function() { current = $(this).val(); if(current) { $('#img_'+label+'-'+current).addClass('selected_thumb'); } }); } function media_type() { $('.media_type').click(function () { $('#media_load').show(); type = $(this).attr('title') || ''; $('#select_media').load('/memorial/media_type/'+type+'/', '', function() { $('#select_media').wrapInner('<div id="select_'+type+'"></div>'); $('#select_media').append('<ul class="root_link"><h3><a class="load_media" onclick="return false;" href="#">Return to Select Media Type</a></h3></ul>'); load_media_type(); $('#media_load').hide(); window[type+'_loader'](); }); }); } media_type(); function load_media_type() { $('.load_media').click(function () { $('#media_load').show(); $('#select_media').load('{% url mem_media_type %}', '', function() { $('#media_load').hide(); media_type(); }); }); } function our_photos_loader() { img_thumb_loader('our_photos', 'media', '{% url mem_our_photos %}', true); } function our_videos_loader() { img_thumb_loader('our_videos', 'media', '{% url mem_our_videos %}', false); } </script> HTML - Initial Page load <fieldset> <legend>Memorial Media</legend> <div style="display: none;" id="media_load" class="loading"/> <div id="select_media"> <ul style="width: 528px;" class="initial"> <li title="your_photos" class="media_type"><div class="photo_select_upload"><h3>Your Photos</h3></div></li> <li title="our_photos" class="media_type"><div class="photo_select"><h3>Our Photos</h3></div></li> <li title="our_videos" class="media_type"><div class="video_select"><h3>Our Videos</h3></div></li> </ul> </div> </fieldset> HTML - Returned from Click on section 1 this section can make calls to subcategories and it will work <br class="clear" /> <ul class="thumb_sub_category" style="width: 352px;"> <li id="our_photos_category-29" class="our_photos_category" title="29"> <div> <span style="background-image: url(/site_media/photologue/photos/cache/stuff_004_thumbnail.jpg);" class="thumb"><span></span></span> <p>Birds 1</p> </div> </li> <li id="our_photos_category-25" class="our_photos_category" title="25"> <div> <span style="background-image: url(/site_media/photologue/photos/cache/dsc_0035_thumbnail.jpg);" class="thumb"><span></span></span> <p>Dogs 1</p> </div> </li> </ul> HTML - Returned from click on Section 2 Having trouble with sub-categories from this area <br class="clear" /> <ul class="thumb_sub_category" style="width: 528px;"> <li id="our_videos_category-1" class="our_videos_category" title="1"> <div> <span style="background-image: url(/site_media/photologue/photos/cache/forest-1_thumbnail.jpg);" class="thumb"><span></span></span> <p>Video 1</p> </div> </li> <li id="our_videos_category-3" class="our_videos_category" title="3"> <div> <span style="background-image: url(/site_media/photologue/photos/cache/mountain-1_thumbnail.jpg);" class="thumb"><span></span></span> <p>Video 3</p> </div> </li> <li id="our_videos_category-4" class="our_videos_category" title="4"> <div> <span style="background-image: url(/site_media/photologue/photos/cache/mountain-3_thumbnail.jpg);" class="thumb"><span></span></span> <p>Video 4</p> </div> </li> </ul> HTML that fails to load inside - Section 3 <br class="clear" /> <ul class="thumb_sub_category" style="width: 528px;"> <li id="our_videos_category-1" class="our_videos_category" title="1"> <div> <span style="background-image: url(/site_media/photologue/photos/cache/forest-1_thumbnail.jpg);" class="thumb"><span></span></span> <p>Video 1</p> </div> </li> <li id="our_videos_category-3" class="our_videos_category" title="3"> <div> <span style="background-image: url(/site_media/photologue/photos/cache/mountain-1_thumbnail.jpg);" class="thumb"><span></span></span> <p>Video 3</p> </div> </li> <li id="our_videos_category-4" class="our_videos_category" title="4"> <div> <span style="background-image: url(/site_media/photologue/photos/cache/mountain-3_thumbnail.jpg);" class="thumb"><span></span></span> <p>Video 4</p> </div> </li> </ul>

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  • Height:100% is not considered

    - by Ivan90
    Hi guys, I would want to simulate the behavior of a table with div. I have a struct of my layout divide into three columns: div#wrapper { width:800px; float:left; height:100%; margin-top:7px; text-align:center; } div#left { width:167px; float:left; padding-bottom:50px; margin-right:3px; } div#main { width:454px; float:left; } div#right { width:167px; float:left; margin-left:3px; } wrapper is the container of three columns left,main,right div "main" have a variable content so in some case is more long and in other case is very short. When the content vary,div wrapper is adapted and it's ok but left and right columns don't adapt to wrapper. P.S Without doctype there is no problem, infact I set the height of left, main and right to 100% but when I insert transional.dtd , the height of div is not considered. How can resolve this problem? Sorry for my english!!

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  • pam debugging "check pass; user unknown"

    - by lvc
    I am attempting to get Prosody authenticating with its auth_pam module. It is configured to use the pam service name xmpp. The pam.d/xmpp file is copied straight from the one configured for dovecot (originally taken from, I think, dovecot's documentation), which is known to be working: # cat /etc/pam.d/xmpp auth required pam_unix.so nullok debug account required pam_unix.so debug Logging in with dovecot works wonderfully. Logging in with prosody, with exactly the same username and password, causes Prosody to return 'Not authorized', and the following in journalctl -f: Oct 29 22:12:14 riscque.net prosody[9396]: c2s1d010b0: Client sent opening <stream:stream> to riscque.net Oct 29 22:12:14 riscque.net prosody[9396]: c2s1d010b0: Sent reply <stream:stream> to client Oct 29 22:12:14 riscque.net prosody[9396]: [178B blob data] Oct 29 22:12:14 riscque.net unix_chkpwd[9408]: check pass; user unknown Oct 29 22:12:14 riscque.net prosody[9396]: pam_unix(xmpp:auth): conversation failed Oct 29 22:12:14 riscque.net prosody[9396]: pam_unix(xmpp:auth): unable to obtain a password Oct 29 22:12:14 riscque.net prosody[9396]: pam_unix(xmpp:auth): auth could not identify password for [lvc] Oct 29 22:12:14 riscque.net prosody[9396]: riscque.net:saslauth: sasl reply: <failure xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><not-authorized/><text>Unable to authorize you with the authentication credentials you&apos;ve sent.</text></failure> This series of errors seems mutually contradictory - first it says "user unknown", but then that it can't obtain the password for lvc - this username certainly exists on the system. What is likely going on here, and how would I debug this further?

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  • Two audio streams - headphones and speakers

    - by Sylvester
    What I want (this is probably hard for most to answer, as this is a very unique setup) is to have two different streams (this means audio splitter is not an option, as it will still only be one stream) of audio - one through the headphones and one through the main speakers. I can do the audio rerouting using virtual audio cables, however the problem is this: i cannot get both headphones AND speakers to play even just one stream, let alone two seperate ones. using "split front and back audio into seperate streams is not an option, as the actual MB F_PANEL is faulty (nothing to do with the case front panel, just so you know. that works fine) So, first things first. I need it to recognise the headphones as a seperate audio device so that Virtual Audio Cables will detect it and allow me to route the necessary audio to the headphones only. I also need to be able have sound play through speakers and headphones together what i want to achieve overall, is this: have the ENTIRE computer's sounds picked up by VAC, and stream them to Line1. then have Line1 stream to the headphones. that way whatever's being streamed is heard through the headphones, while the entire system sounds (including those not streamed) are played through speakers.

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  • Internet Radio Station for University

    - by ryan
    I am trying to help my University Student Radio station rethink the setup of the way they stream music, but I have some questions regarding the use of Ubuntu to stream music. Currently, the radio station uses two windows machines: one of which is used to stream the radio station and serve the website, and the other is used by rotating djs to select songs and create playlists. The computer used by djs feeds mono into the sound card of the server and the server streams the feed online. -Ideally I would like to maintain a two-computer setup: One computer as server, and another that is used to select and play music by rotating djs. -I would like to use Ubuntu for the server. -I would like to use Windows for the other machine. -The server should be able to stream song information. First, is there a way to somehow get the song information from an analog feed? Second, what is the best streaming server for radio? I have encountered shoutcast, icecast, and darwin, but I don't know where to begin in attempting to gauge them. Finally, if anyone has any tips or pointers about small internet radio station management/ setup they would be appreciated as this is my first radio station, and I am eager to hear of past experiences.

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  • Is ffmpeg incorrectly interpreting .aif files?

    - by marue
    Being on an Ubuntu 10.04 server i installed the ffmpeg packages with apt. ffmpeg is working afterwards, and doing as it should. Almost. For testing purposes i uploaded a few audiofiles. One of them, an aif file, is not being correctly interpreted. While on my workhorse (Mac SnowLeopard) ffmpeg tells the format as Stream #0.0: Audio: pcm_s24be, 44100 Hz, 2 channels, s32, 2116 kb/s my Ubuntu server says it is: Stream #0.0: Audio: pcm_s24be, 44100 Hz, stereo, s16, 2116 kb/s which is the wrong bitdepth. Ubuntu then fails to convert the file with the error message [pcm_s24be @ 0xcd4b580]invalid PCM packet Error while decoding stream #0.0 which certainly is not true. The file is perfectly valid. Are there any know issues for ffmpeg interpreting the aif format? How can i find out which version of the aif-codec ffmpeg is using? Any ideas how to approach this issue? ffprobe output: FFprobe version SVN-r20090707, Copyright (c) 2007-2009 Stefano Sabatini libavutil 49.15. 0 / 49.15. 0 libavcodec 52.20. 0 / 52.20. 1 libavformat 52.31. 0 / 52.31. 0 built on Jan 20 2010 00:13:01, gcc: 4.4.3 20100116 (prerelease) Input #0, aiff, from 'testfile.aif': Duration: 00:00:04.00, start: 0.000000, bitrate: 2117 kb/s Stream #0.0: Audio: pcm_s24be, 44100 Hz, stereo, s16, 2116 kb/s update 2: Forcing the conversion with -sample_fmt s32 doesn't change anything. Strange thing is: Even without using -sample_fmt s32 i just realized that the conversion is working and creates valid audiofiles. There just is the error message from above.

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