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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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  • Rails 3 shows 404 error instead of index.html (nginx + unicorn)

    - by Miko
    I have an index.html in public/ that should be loading by default but instead I get a 404 error when I try to access http://example.com/ The page you were looking for doesn't exist. You may have mistyped the address or the page may have moved. This has something to do with nginx and unicorn which I am using to power Rails 3 When take unicorn out of the nginx configuration file, the problem goes away and index.html loads just fine. Here is my nginx configuration file: upstream unicorn { server unix:/tmp/.sock fail_timeout=0; } server { server_name example.com; root /www/example.com/current/public; index index.html; keepalive_timeout 5; location / { try_files $uri @unicorn; } location @unicorn { proxy_pass http://unicorn; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header Host $host; proxy_redirect off; } } My config/routes.rb is pretty much empty: Advertise::Application.routes.draw do |map| resources :users end The index.html file is located in public/index.html and it loads fine if I request it directly: http://example.com/index.html To reiterate, when I remove all references to unicorn from the nginx conf, index.html loads without any problems, I have a hard time understanding why this occurs because nginx should be trying to load that file on its own by default. -- Here is the error stack from production.log: Started GET "/" for 68.107.80.21 at 2010-08-08 12:06:29 -0700 Processing by HomeController#index as HTML Completed in 1ms ActionView::MissingTemplate (Missing template home/index with {:handlers=>[:erb, :rjs, :builder, :rhtml, :rxml, :haml], :formats=>[:html], :locale=>[:en, :en]} in view paths "/www/example.com/releases/20100808170224/app/views", "/www/example.com/releases/20100808170224/vendor/plugins/paperclip/app/views", "/www/example.com/releases/20100808170224/vendor/plugins/haml/app/views"): /usr/local/rvm/gems/ruby-1.9.2-rc2/gems/actionpack-3.0.0.beta4/lib/action_view/paths.rb:14:in `find' /usr/local/rvm/gems/ruby-1.9.2-rc2/gems/actionpack-3.0.0.beta4/lib/action_view/lookup_context.rb:79:in `find' /usr/local/rvm/gems/ruby-1.9.2-rc2/gems/actionpack-3.0.0.beta4/lib/action_view/base.rb:186:in `find_template' /usr/local/rvm/gems/ruby-1.9.2-rc2/gems/actionpack-3.0.0.beta4/lib/action_view/render/rendering.rb:45:in `_determine_template' /usr/local/rvm/gems/ruby-1.9.2-rc2/gems/actionpack-3.0.0.beta4/lib/action_view/render/rendering.rb:23:in `render' /usr/local/rvm/gems/ruby-1.9.2-rc2/gems/haml-3.0.15/lib/haml/helpers/action_view_mods.rb:13:in `render_with_haml' etc... -- nginx error log for this virtualhost comes up empty: 2010/08/08 12:40:22 [info] 3118#0: *1 client 68.107.80.21 closed keepalive connection My guess is unicorn is intercepting the request to index.html before nginx gets to process it.

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  • What are the video formats supported by MPMoviePlayerController on the iPad?

    - by Mike
    When you use iTunes to sync your videos with the iPhone the videos are always saved with no more than 640 pixels wide, if I am not wrong. What about the iPad? What is the size of videos iTunes syncs with iPad? 1024x768? and what if the video has a dimension below 1024x768? Will it scale up? or will it keep the video at low res and scale when you play? The question is because I am using the MPMoviePlayerController and I need to know what resolutions to expect, so I can adjust the interface. thanks.

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  • Covariance and Contravariance on the same type argument

    - by William Edmondson
    The C# spec states that an argument type cannot be both covariant and contravariant at the same time. This is apparent when creating a covariant or contravariant interface you decorate your type parameters with "out" or "in" respectively. There is not option that allows both at the same time ("outin"). Is this limitation simply a language specific constraint or are there deeper, more fundamental reasons based in category theory that would make you not want your type to be both covariant and contravariant? Edit: My understanding was that arrays were actually both covariant and contravariant. public class Pet{} public class Cat : Pet{} public class Siamese : Cat{} Cat[] cats = new Cat[10]; Pet[] pets = new Pet[10]; Siamese[] siameseCats = new Siamese[10]; //Cat array is covariant pets = cats; //Cat array is also contravariant since it accepts conversions from wider types cats = siameseCats;

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  • Exception while running Quartz Schdular program

    - by Sunny Mate
    hi, i am getting he following Exception while running my Quartz Schdular program. Below is the exception Trace Mar 26, 2010 2:54:24 PM org.quartz.core.QuartzScheduler start INFO: Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED started. Exception in thread "main" java.lang.IllegalArgumentException: Job class must implement the Job interface. at org.quartz.JobDetail.setJobClass(JobDetail.java:291) at org.quartz.JobDetail.(JobDetail.java:138) at com.Quarrtz.RanchSchedule.main(RanchSchedule.java:18) i have included Quartz-1.7.2.jar and Quartz-all-1.7.2.jar in my class path along with commom-logging 1.1.jar and jdk 6 this is an example i have copy and pasted from JAVA RANCH http://www.javaranch.com/journal/200711/combining_spring_and_quartz.html First example in the above page any help pls thanx in advance Sunny Mate

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  • Calling a GWT service in a different context than the GWT Module Base?

    - by Epaga
    I have a GWT module with the X-GWT-Module-Base http://host:8080/foo/ and would like to call a (GWT) service which is located at http://host:8080/bar/. The reason is for example that I want to be able to share a GWT service between two different GWT client projects. All I've gotten to work so far is if the service is located within the module context, i.e. http://host:8080/foo/bar works fine, using @RemoteServiceRelativePath("bar") in my service interface. It seems that the @RemoteServiceRelativePath only allows a value relative to the module base URL...so is there some other way to accomplish what I'm trying to accomplish?

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  • Labeling connections using Oracle Universal Connection Pool (UCP) doesn't seem to work

    - by sapporo
    I'm evaluating the Oracle Universal Connection Pool (UCP) included with their 11.2 JDBC driver, but cannot get the labeling functionality to work properly (which I'd like to use to minimize the amount of ALTER SESSION statements). I'm basically following their sample code to implement the ConnectionLabelingCallback interface. The callback method cost(Properties reqLabels, Properties currentLabels) is called as expected, so the callback seems to be configured correctly. However, the other callback method configure(Properties reqLabels, Object conn) is passed arguments that make it impossible to provide a meaningful implementation: reqLabels is always null, so the callback method has no way of knowing what labels need to be set. conn is of type oracle.jdbc.driver.T4CConnection, which cannot be cast to LabelableConnection, so the callback method has no way of inspecting or manipulating the labels attached to the connection. My code is running on Java 6 and using ojdbc6.jar and ucp.jar version 11.2.0.1.0. The database is actually 10.2, but that should not be a problem according to the docs, since the UCP functionality is completely implemented in the JDBC driver. Thanks in advance!

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  • Is it a good object-oriented-design practice to send a pointer to private data to another class?

    - by Denis
    Hello everyone, There is well known recommendation not to include into class interface method that returns a pointer (or a reference) to private data of the class. But what do you think about public method of a class that sends to another class a pointer to the private data of the first one. For example: class A { public: void fA(void) {_b.fB(&_var)}; private: B _b; int _var; }; I think that it is some sort of data hiding damage: the private data define state of their own class, so why should one class delegate changes of its own state to another one? What do you think? Denis

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  • Magento: Rebuilding Flat Catalog Programmatically

    - by karnage
    I am using a cron to import inventory changes nightly. When I try to change a product's information (price, etc) I get the following error: Column not found: 1054 Unknown column 'e.display_price_group_0' in 'field list' I can fix this by clicking "Rebuild Flat Catalog Product" in the Cache Management panel. I setup a cron to do this programmatically using the following code: Mage :: getResourceModel( 'catalog/product_flat_indexer' ) -> rebuild(); I don't get any errors when I run the script, but the "Column not found" error persists. Does anyone know how I can rebuild the flat catalog other than through the admin interface?

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  • iphone - presenting an alertview with the right orientation

    - by Mike
    I have to present an alertview when my app starts. My app supports both landscape modes. Despite the landscape mode the device is when the app starts the alertview always shows in portrait. I have tried to use the accelerometer to detect the interface orientation before the orientation notification and I have the correct orientation 2 seconds before the alertview showing. Then, I use this code to set the status bar to a different orientation, hoping the alertview will follow... [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeRight]; or left, depending on the landscape mode. Nothing works. Is there a way to force the alertview to respect the orientation? The point here is this: I cannot set one landscape orientation in particular for the status bar, I have to detect the orientation the device is on and then set the status bar orientation. thanks for any help.

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  • How to test localized winforms application?

    - by Sun
    Background: I have created sample windows application for learning to implement localization. My each form has two RESX file. One for Bulgaria and one for French(Belgium). It has default culture English(XX) To test locally currently I am programmatically changing UICulture i.e. Thread.CurrentThread.CurrentUICulture = new CultureInfo("fr-BE"); And it works fine. Problem: How can I test without forcing the UI Culture programatically? I have tried changing Control Panel Regional Options Standard and Formats to French(Belgium). That made changes to DatePickerControl and now it display the dates French. However I can still see the Button text in English, where as if I test by injecting CultureInfo programmatically it changes to french. If I am able to change the standard and formats to French do I still need to Install Multilingual User Interface Pack (MUI)?

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  • Make Custom Project template in Eclipse IDE

    - by Mohit Deshpande
    I have been using Eclipse IDE for a long time. Its a really great IDE for Java/C/C++ (and other languages with its THOUSANDS of plugins). Every once in a while, I get the need for creating a Javax interface. To do this normally, I would setup the new java project then add what I need. But, wouldn't it be nice if I could just make a template project to automatically include the code for the files. How would I go about doing this? It it even possible? The Eclipse CDT can make a new project type. So can the Google ADT and Google App engine. So I would imagine it is possible. But how?

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  • How safe am I singing into Google Spreadsheets with yeroon.net/ggplot2

    - by Farrel
    I am impressed by what I have seen of yeroon.net/ggplot2 which is a web interface for Hadley Wickham's R package ggplot2. I want to try it out on my own data. The part that has me very excited is that one can use data stored in one's own Google spreadsheet as the data. One just signs into their Google Account so that yeroon.net/ggplot2 can access the spreadsheet list. I have been hesitant to do it. If I sign in whilst on yeroon.net am I handing over my username and password to a third party? It would not be wise of me to divulge my google password to third parties since Google is fast becoming my repository of everything. How do I know if Jeroon's application is using ClientLogin or OAuth? My understanding is very basic and may be wrong but nevertheless here it is. OAuth would be better since it does not actually pass the password onto the third party application.

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  • How to get function name against function address by reading co-classs'es vtable?

    - by Usman
    Hello, I need to call the co-class function by reading its address from vtable of COM exposed interface methods. I need some generic way to read addresses. Now I need to call the function, which would have specific address(NOT KNOWN) arguments(parameters) which I have collected from TLB, and name as well. How that address corresponds to that function name to which I am going to call. For this I need to traverse vtable which is holding functional addresses, LASTLY need to correspond function address with NAME of that function. This is I dont know. How? More over one function with the same name may appear in vtable(Overloading case). In that case we need to distinguish function names w.r.t their addresses. How to tackle ? Regards Usman

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  • WPF Error when implementing Login.xaml

    - by LnDCobra
    I am getting the following exception: "Nullable object must have a value" Everything was working when I was using StartupURI="MainWindow.xaml" but I wanted to implement a login screen so I changed this to Startup="Application_Startup" and then created the following method in App.xaml.cs: private void Application_Startup(object sender, StartupEventArgs e) { UpdateAccounts(); bool result = true; ///* LoginWindow login = new LoginWindow(); result = login.ShowDialog().Value; /* */ if (!result) { return; } MainWindow window = new MainWindow(); bool main = window.ShowDialog().Value; } Does anyone have any idea what is going on? Or any suggestions on what is the best practice for implementing login interface.

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  • How to show a progress report to the user in Google Apps Script?

    - by Jose M Vidal
    I have a simple script that will send out a bunch of emails but these take time to send and I want to show the user a scrolling window with the emails addresses as they are sent (or, a progress bar would be good too). I believe this is possible with the new User Interface Classes, but I can't get it to work. The documentation is kinda sparse. Specifically, the problem is that the GUI window that pops up appears blank until all the emails have been sent (the script ends) and then the text appears. This happens even if I call show(myapp) after every time I update the Label.

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  • Template engine recommendations

    - by alex
    I'm looking for a template engine. Requirements: Runs on a JVM. Java is good; Jython, JRuby and the like, too... Can be used outside of servlets (unlike JSP) Is flexible wrt. to where the templates are stored (JSP and a lot of people require the templates to be stored in the FS). It should provide a template loading interface which one can implement or something like that Easy inclusion of parameterized templates- I really like JSP's tag fragments Good docs, nice code, etc., the usual suspects I've looked at JSP- it's nearly perfect except for the servlet and filesystem coupling, Stringtemplate- I love the template syntax, but it fails on the filesystem coupling, the documentation is lacking and template groups and stuff are confusing, GXP, TAL, etc. Ideas, thoughts? Alex

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  • JNA and ZBar(library for bar code reader)

    - by user219120
    I'm creating Java Interface with JNA for ZBar(library for bar code reader). In JNA, structures in C are needed to declare. For example:: // In C typedef struct { char* id; char* name; int age; char* sectionId } EMPLOYEE; to // In Java with JNA public static class Employee extends Structure { // com.sun.jna.Structure String id; String name; int age; String sectionId; } But in ZBar, structures have no members. For example:: // zbar-0.10/include/zbar.h // line:1009-1011 struct zbar_image_scanner_s; /** opaque image scanner object. */ typedef struct zbar_image_scanner_s zbar_image_scanner_t; That doesn't declare size or members of the structures. How can I write interfaces for these structures in JNA?

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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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  • Injecting multi-tenant repositories with StructureMap in ASP.NET MVC

    - by FreshCode
    I'm implementing StructureMap in a multi-tenant ASP.NET MVC application to inject instances of my tenant repositories that retrieve data based on an ITenantContext interface. The Tenant in question is determined from RouteData in a base controller's OnActionExecuting. How do I tell StructureMap to construct TenantContext(tenantID); where tenantID is derived from my RouteData or some base controller property? Base Controller Given the following route: {tenant}/{controller}/{action}/{id} My base controller retrieves and stores the correct Tenant based on the {tenant} URL parameter. Using Tenant, a repository with an ITenantContext can be constructed to retrieve only data that is relevant to that tenant. Based on the other DI questions, could AbstractFactory be a solution?

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  • Java - When to use Iterators?

    - by Walter White
    Hi all, I am trying to better understand when I should and should not use Iterators. To me, whenever I have a potentially large amount of data to iterate through, I write an Iterator for it. If it also lends itself to the Iterator interface, then it seems like a win. I was reading a little bit that there is a lot of overhead with using an Iterator. A good example of where I used an Iterator was to iterate through a bunch of SQL scripts to execute one query at a time, reading it in, then executing it. Is there another performance trade off I should be aware of? Before I used iterators, I would read the entire String of SQL commands to execute into an ArrayList, and the iterate through that. If the import is rather large (like for geolocation data, then the server tends to get bogged down). Walter

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  • XStream <-> Alternative binary formats (e.g. protocol buffers)

    - by sehugg
    We currently use XStream for encoding our web service inputs/outputs in XML. However we are considering switching to a binary format with code generator for multiple languages (protobuf, Thrift, Hessian, etc) to make supporting new clients easier and less reliant on hand-coding (also to better support our message formats which include binary data). However most of our objects on the server are POJOs with XStream handling the serialization via reflection and annotations, and most of these libraries assume they will be generating the POJOs themselves. I can think of a few ways to interface an alternative library: Write an XStream marshaler for the target format. Write custom code to marshal the POJOs to/from the classes generated by the alternative library. Subclass the generated classes to implement the POJO logic. May require some rewriting. (Also did I mention we want to use Terracotta?) Use another library that supports both reflection (like XStream) and code generation. However I'm not sure which serialization library would be best suited to the above techniques.

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  • ISerializable and backward compatibility

    - by pierusch
    hello I have to work an an old application that used binaryFormatter to serialize application data into filestream (say in a file named "data.oldformat") without any optimizazion the main class has been marked with attribute <serializable()>public MainClass ....... end class and the serialization code dim b as new binaryformatter b.serialize(mystream,mymainclass) In an attempt to optimize the serialization/deserialization process I simply made the class implement the ISerializable interface and wrote some optimized serialization routines <serializable()>public MainClass implements ISerializable ....... end class The optimization works really well but I MUST find a way to reatrive the data inside the old files for backward compatibility. How can I do that?? Pierluigi

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  • USB Serial cable with CDC support

    - by Harsha
    Hi All, I bought a USB to Serial cable which claims to be CDC compliant. But the bInterfaceClass value in interface descriptor is 0xFF(which is vendor specific). I was expecting it to be 0x02 (Communications and CDC control). In the device manager, i found that the drivers being loaded are ser2pl.sys and serenum.sys. I had learnt usbser.sys is the windows CDC driver, but it was not loaded for my cable. I am pretty much new to this CDC, so i have following questions 1.Does this indicate that the cable is not CDC compliant 2.Can i make this cable CDC compliant (since CDC is a driver functionality), by loading usbser.sys. If yes how?

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  • Invalid receiver type 'NSUInteger'

    - by CJ
    I have a Core Data entity whose header file looks like this: @interface MyEntity : NSManagedObject { } @property (nonatomic, retain) NSNumber * index; @end And it's implementation file looks like this: @implementation MyEntity @dynamic index; @end Now, I have a piece of code that looks like this: NSArray* selectedObects = [myEntityArrayController selectedObjects]; NSUInteger theIndex = [[[selectedObects objectAtIndex:0] index] unsignedIntegerValue]; The 'myEntityArrayController' object is a NSArrayController which manages all entities of MyEntity. This code executes correctly, however XCode always gives the warning "Invalid receiver type 'NSUInteger'" for the last line of code. For some reason, XCode thinks that the index method returns a NSUInteger. I'm not sure why it thinks this, because 'objectAtIndex' returns an object of type 'id'. I've cleaned the project several times, and these warnings have hung around for a while. Any suggestions are appreciated.

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