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• .Net: Prevent an object from being paged out (VirtualLock equivalent)

  - by Gene

  How would one go about keep an object in memory such that it won't be paged out by the OS in .Net? i.e. Something similar to VirtualLock, but operating on an object, such that if compacting occurs and the object is moved it still would not be paged out, etc.. (I suppose one could pin the object's, determine what pages it belongs to, and then VirtualLock those pages, but that seems non-desireable for many reasons.) If possible, could you point me to a reference or working sample? (C# ideally) Many thanks in advance!

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• how to implement IOC without a global static service (non-service locator solution)?

  - by Michel

  Hi, we want to use Unity for IOC. All i've seen is the implementation that there is one global static service which holds a reference to the Unity container, which registers all interface/class combinations and every class asks that object: give me an implementation for Ithis or IThat. Frequently i see a response that this pattern is not good because it leads to a dependency from ALL classes to this service. But what i don't see often, is: what is the alternative way? Michel EDIT: found out that the global static service is called the service locator, added that to the title.

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• What is resource-ref in web.xml used for?

  - by Denise

  Hi everyone, I'm just wondering when/why you would define a resource-ref element in your web.xml file? I would have thought that it would be defined in your web/app server using JNDI and then look up the JNDI reference in your Java code? The resource-ref definition seems a bit redundant to me and I can't think of when it might be useful. Example: <resource-ref> <description>Primary database</description> <res-ref-name>jdbc/primaryDB</res-ref-name> <res-type>javax.sql.DataSource</res-type> <res-auth>CONTAINER</res-auth> </resource-ref> Thanks!

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• Why don't web fonts in Firefox don't work on a different domain?

  - by mikez302

  I was experimenting with the fancy new OpenType font capability in Firefox 3.5 and I ran into a problem. I was trying to embed a font on a different domain than the page it would be used on, and it didn't work. I thought it may have been a bug, but from what I read on the MDC reference page, I noticed this note: In Gecko, web fonts are subject to the same domain restriction (font files must be on the same domain as the page using them), unless HTTP access controls are used to relax this restriction. It looks like they designed the browser that way on purpose. Out of curiosity, why would they do that? Is there any security risk with embedding a font? Or is it for legal trademark or copyright issues? Or something else?

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• How do you add a row to a databound datagridview using the datagridview in the gui?

  - by IsaacB

  Hi guys, I've bound a datagridview to a collection of objects. It's giving me a null reference exception when I try to add a new row to a collection (empty or otherwise) using the gui. More specifically, when there is a write event it does this. How can I override the behavior of the write event and manually add all of the columns contents to the object collection? I could disable the add new row feature and make an add button, but the built in datagridview row add looks so much more slick.

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• How does load balancing work with multiple server with multiple DBs

  - by Matt

  I guess what im looking for is a description on how this all works together. I'm used to setting up one server with maybe another server to handel the DB. My question is how does the load balancer work where do all the script(php,python) files go? If i make a change to one i have to rsync them to all the server that the balancer refers to? Also does each server need client side DB's installed so they can reference the DB's that are on other servers? If there is a site that explains all this i would be happy to read it.

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• Rails, using jQuery without jrails

  - by ibuck

  Hello all, I have been trying to convert my rails 2.2.2 app over to jQuery, and would like so without using jrails. The only reference material I can find on the subject is Railscasts Episode 136. Ryan goes over how to use jQuery to post a form and handle the response in a .js.erb file. My questions is has anyone tried to use jQuery with .js.erb files with anchors as the trigger? As a replacement for "link_to_remote". I have gotten jQuery to do a .get to submit this link on click to the controller, but I cannot seem to get it to go into the .js.erb file. Thanks

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• How to properly use CoreData validation & error framework ?

  - by Xav

  I've created a model in Xcode, and for various attributes I have minimum & maximum values defined and that are enforced by coreData at runtime. I'm using NSManagedObject validateValue:forKey:error to check for user input values. I was a bit disappointed to see that the localized error message is not specific, and I get a "The operation couldn't be completed. (Cocoa error 1620)" for too small values and a "The operation couldn't be completed. (Cocoa error 1610)" for too large values. It's written in the coreData documentation that "you can localize most aspects of a managed object model, including entity and property names and error messages". Unfortunately it's not very detailed on how you implement it for error messages. So How do you customize error message ? How do you localize them ? Is it possible to customize it in a way where it will mentioned the reference value ex: "Value should be lower than %@" or "Value should be higher than %@" ?

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• Rails partial show latest 5 kases

  - by Danny McClelland

  Hi Everyone, I have my application setup with a few different partials working well. I have asked here how to get a partial working to show the latest entry in the kase model, but now I need to show the latest 5 entries in the kase model in a partial. I have duplicated the show most recent one partial and it's working where I need it to but only shows the last entry, what do I need to change to show the last 5? _recent_kases.html.erb <% if Kase.most_recentfive %> <h4>The most recent case reference is <strong><%= Kase.most_recentfive.jobno %></strong></h4> <% end %> kase.rb def self.most_recentfive first(:order => 'id DESC') end Thanks, Danny

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• Identifying NHibernate proxy classes

  - by Marc Gravell

  I'm not an NHibernate user; I write a serialization utility library. A user has logged a feature-request that I should handle NHibernate proxy classes, treating them the same as the actual type. At the moment my code is treating them as unexpected inheritance, and throwing an exception. The code won't know in advance about NHibernate (including no reference, but I'm not aftaid of reflection ;-p) Is there a robust / guaranteed way of detecting such proxy types? Apparently DataContractSerializer handles this fine, so I'm hoping it is something pretty simple. Perhaps some interface or [attribute] decoration. Also, during deserialization; at the moment I would be creating the original type (not the NHibernate type). Is this fine for persistence purposes? Or is the proxy type required? If the latter; what is required to create an instance of the proxy type?

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• How do I get Tycho?

  - by Jens Schauder

  Tycho is supposed to be a plug-in for maven for building eclipse plug-ins. I have found various blogs and other articles about it, but the contained links to Tycho are all dead or not accessible for the general public, for example: http://www.sonatype.com/people/2009/04/tycho-040-roadmap/ The only thing I found is a project proposal on the eclipse site, but it doesn't reference any downloads: http://www.eclipse.org/proposals/tycho/ I found a svn repository, but it seems to be extremely dated: http://svn.codehaus.org/m2eclipse/tycho/trunk/ So my question is: where do I get tycho from? Or is it dead and I should stop bothering? I doubt it's dead, since I found out there is a talk about it on JAX2010 ...

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• How To create a Simple NDK Program in Android NDK

  - by Rakesh

  Hi I am new to android Programming and NDK.Yet i am not clear with working in NDK.I just downloaded android ndk r4.If i want to develop appln using NDK,and i refered http://marakana.com/forums/android/android_examples/49.html for reference,But still not clear how to create the header file and implementation,I did nt have any previuos exp in c language.And they asked for run javah tool to create the JNI header file. I dont know how to use javah tool,but i found it in java bin directory and i tried using cmd javah -jni com.pathname.classname is this correct syntax? if so i tried doing it in android bin directory.I want to know ,what classname represents,is this name of header file class that i try to create Regards Rakesh Shankar.P

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• Capture Flash Audio in 4.7 Edge?

  - by emcmanus

  Is there a way to capture plugin (Flash) audio before it gets to the sound card? I'd like to record plugin audio, hopefully without actually playing the sound. Capturing audio at the device level is an absolute last resort, as the application would pick up all system audio rather than just the Webkit plugin. I'm aware of the recent switch back from QTMultimedia; is this possible with phonon? I spent the night looking for some way to access the phonon graph via QWebFrame (or any of the QtWebkit widgets) -- and didn't turn up much. I also started digging through QTWebkit, particularly NPAPI, without success. For reference, I'm using the edge version of 4.7 (6aa50af000f85cc4497749fcf0860c8ed244a60e) This seems to be a fairly challenging problem. Any hints would be greatly appreciated.

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• Is it a good idea to create an STL iterator which is noncopyable?

  - by BillyONeal

  Most of the time, STL iterators are CopyConstructable, because several STL algorithms require this to improve performance, such as std::sort. However, I've been working on a pet project to wrap the FindXFile API (previously asked about), but the problem is it's impossible to implement a copyable iterator around this API. A find handle cannot be duplicated by any means -- DuplicateHandle specifically forbids passing handles to it. And if you just maintain a reference count to the find handle, then a single increment by any copy results in an increment of all copies -- clearly that is not what a copy constructed iterator is supposed to do. Since I can't satisfy the traditional copy constructible requirement for iterators here, is it even worth trying to create an "STL style" iterator? On one hand, creating some other enumeration method is going to not fall into normal STL conventions, but on the other, following STL conventions are going to confuse users of this iterator if they try to CopyConstruct it later. Which is the lesser of two evils?

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• Does a WCF service with basicHttpBinding create a new connection for each request?

  - by Phil Wright

  I have a Silverlight client calling a WCF Service on an IIS web server. It uses the default basicHttpBinding setting for the calls. My client code has the usual Visual Studio generated proxy that is generated when using the 'Update Service Reference' menu option. Does every call to the service using that proxy use the same connection? Or does it create a connection each time a call is made and then close it down once the reply is received? As the client is actually making a SOAP call over HTTP I just assumed that every service request had a new connection created but I want to check if that is the case? (I need to know because if it creates a new connection each time then each request could end up at a different server because there are several servers being load balanced. It is uses a single connection for the duration of the proxy then I can assume they all end up at the same machine and so it would cache state.)

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• Where Are the Release Versions of ASP.Net AJAX 4.0 Templating Files?

  - by Lee Richardson

  I'm trying to get the production version of ASP.Net AJAX 4.0 Templating working and can't find the JavaScript files. With the beta version I needed to reference MicrosoftAjaxTemplates.js, MicrosoftAjaxAdoNet.js, and MicrosoftAjaxDataContext.js. I can get everything to work with the beta CDN versions (e.g. http://ajax.microsoft.com/ajax/beta/0911/MicrosoftAjaxTemplates.js). But for the life of me I can't find 1. The release CDN versions of these files or 2. Where to download the whole Release ASP.Net AJAX 4.0 JavaScript package. The files certainly are not listed on the ASP.Net AJAX 4.0 CDN at http://www.asp.net/ajaxlibrary/CDNAjax4.ashx. Maybe the files have been renamed? Theoretically this should be a rediculously easy question and I'm a little embarrased to even ask it on StackOverflow, but I've had no luck finding an answer on my own. Any help would be much appreciated. Thanks, - Lee

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• "Expected specifier-quantifier-list before b2Body" error in XCode

  - by Zeophlite

  I'm trying to derive class from CCSprite to store the sprites reference to its corresponding b2Body, but I've get the following errors (comments in Code) BoxSprite.h #import <Foundation/Foundation.h> #import "Box2D.h" #import "cocos2d.h" @interface BoxSprite : CCSprite { b2Body* bod; // Expected specifier-quantifier-list before b2Body } @property (nonatomic, retain) b2Body* bod; // Expected specifier-quantifier-list before b2Body @end // Property 'bod' with 'retain' attribute must be of object type BoxSprite.m #import "BoxSprite.h" @implementation BoxSprite @synthesize bod; // No declaration of property 'bod' found in the interface - (void) dealloc { [bod release]; // 'bod' undeclared [super dealloc]; } @end I was hoping to create the sprite and assign the body with: BoxSprite *sprite = [BoxSprite spriteWithBatchNode:batch rect:CGRectMake(32 * idx,32 * idy,32,32)]; ... sprite->bod = body; // Instance variable 'bod' is declared protected Then access the b2Body by: if ([node isKindOfClass:[BoxSprite class]]) { BoxSprite *spr = (BoxSprite*)node; b2Body *body = spr->bod; // Instance variable 'bod' is declared protected ... }

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• Double encoded url being fully decoded in ASP.NET

  - by Brad R

  I have just come across something that is quite strange and yet I haven't found any mention on the interwebs of others having the same problem. If I hit my ASP.NET application with a double encoded url then the Request["myQueryParam"] will do a double decode of the query for me. This is not desirable as I have double encoded my query string for a good reason. Can others confirm I'm not doing something obviously wrong, and why this would happen. A solution to prevent it, without doing some nasty query string parsing, would be great too! As an example if you hit the url: http://localhost/MyApp?originalUrl=http%3a%2f%2flocalhost%2fAction%2fRedirect%3fUrl%3d%252fsomeUrl%253futm_medium%253dabc%2526utm_source%253dabc%2526utm_campaign%253dabc (For reference %25 is the % symbol) Then look at the Request["originalUrl"] (page or controller) the string returned is: http://localhost/Action/Redirect?Url=/someUrl?utm_medium=abc&utm_source=abc&utm_campaign=abc I would expect: http://localhost/Action/Redirect?Url=%2fsomeUrl%3futm_medium%3dabc%26utm_source%3dabc%26utm_campaign%3dabc I have also checked in Fiddler and the URL is being passed to the server correctly (one possible culprit could have been the browser decoding the URL before sending).

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• Discussion: Working TDD in a Scrum context

  - by Anders Juul

  Hi all, When I work TDD I tend to start out with the big picture and create the tests that should succeed in order for the overall assignment to be completed - it then kicks off a number of supporting classes/methods/tests as I 'dig in'. If my assignment has been planned out in detail, I would then open one task, and in order to solve it, open another and then another. Only when the overall tests are succeeding can I close the original task, which means that at any given time, I would have a number of open tasks. I find that this approach conflict somewhat with the scrum approach where, ideally, I should be able to take and close a task within a day's work - and never have more than one task open at a time. I'm looking for input about how you manage this in your project - references to articles are also very welcome, I'm sure this has been debated thoroughly somewhere... The 'answer tick' will be awarded to best comment/reference. Thanks for any input, Anders, Denmark

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• Cyclic References and WCF

  - by Kunal

  I have generated my POCO entities using POCO Generator, I have more than 150+ tables in my database. I am sharing POCO entities all across the application layers including the client. I have disabled both LazyLoading and ProxyCreation in my context.I am using WCF on top of my data access and business layer. Now, When I return a poco entity to my client, I get an error saying "Underlying connection was closed" I enabled WCF tracing and found the exact error : Contains cycles and cannot be serialized if reference tracking is disabled. I Looked at MSDN and found solutions like setting IsReference=true in the DataContract method atttribute but I am not decorating my POCO classes with DataContracts and I assume there is no need of it as well. I won't be calling that as a POCO if I decorate a class with DataContract attribute Then, I found solutions like applying custom attribute [CyclicReferenceAware] over my ServiceContracts.That did work but I wanted to throw this question to community to see how other people managed this and also why Microsoft didn't give built in support for figuring out cyclic references while serializing POCO classes

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• OAuth on iPhone: using Safari or UIWebView?

  - by athanhcong

  Hi all, When I implement OAuth in iPhone, I have a dilemma to choose Safari or UIWebView to open the Twitter pages for user authentication? I write some advantage and disadvantage of both case: Using UIWebWeb. The disadvantage is users have to enter their credentials in our application. It's maybe risky phishing. The advantage is this approach will not quit our app. Using Safari for user to authenticate (this approach automatically callbacks to our application) Addvantage: less risky. Disadvantage: have to quit our app A good reference link about this: http://fireeagle.yahoo.net/developer/documentation/oauth_best_practice Which approach do you prefer? Any response is appreciate. Thanks.

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• VB.net 'cross-referencing' tables.

  - by Lee

  Hello, I have a DataGridView that is being filled with data from a table. Inside this table is a column called 'group' that has the ID of an individual group in another table. What I would like to do, is when the DataGridView is filled, instead of showing the ID contained in 'group', I'd like it to display the name of the group. Is there some type of VB.net 'magic' that can do this, or do I need to cross-reference the data myself? Here is a breakdown of what the 2 tables look like: table1 id group (this holds the value of column id in table 2) weight last_update table2 id description (this is what I would like to be displayed in the DGV.) take care, lee BTW - I am using Visual Studios Express.

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• Consuming Web Services in Netbeans

  - by Seven

  Hi. I've setup a project in Netbeans 6.5 with some web services that I've created myself and some web services that I've imported from WSDL files. I've setup a couple of desktop application through Netbeans in order to consume these web services. I'm not too sure where to go from here. I have the GUI setup but not sure how to reference the web services so they can be consumed. I was wondering would anybody be able to guide me through this process or point me in the direction of a relevant tutorial. I'd also like to learn how to consume a web service through a JSP (also created in Netbeans) if possible. Thanks.

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• How does the Garbage Collector decide when to kill objects held by WeakReferences?

  - by Kennet Belenky

  I have an object, which I believe is held only by a WeakReference. I've traced its reference holders using SOS and SOSEX, and both confirm that this is the case (I'm not an SOS expert, so I could be wrong on this point). The standard explanation of WeakReferences is that the GC ignores them when doing its sweeps. Nonetheless, my object survives an invocation to GC.Collect(GC.MaxGeneration, GCCollectionMode.Forced). Is it possible for an object that is only referenced with a WeakReference to survive that collection? Is there an even more thorough collection that I can force? Or, should I re-visit my belief that the only references to the object are weak?

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• Seam cache provider with ehcache null

  - by Cateno Viglio

  Hi every one, I'm trying to configure seam/ehcache following the tutorial from jboss page: http://docs.jboss.org/seam/2.1.2/reference/en-US/html/cache.html I put the ehcache.1.2.3.jar in project.ear/lib and injected CacheProvider as especified, but the CacheProvider always return null. The documentation doesn't show any aditional configuration for ehcache, just for jboss cache. I am probably doing something wrong, it's impossible be so easy :). besides put the jar in /lib, i created the following seam component to test: @Scope(ScopeType.SESSION) @Name("cacheBean") public class CacheSeamBean implements java.io.Serializable { @In(required=false, create=true) private EntityManager em; @Logger private Log log; @In private Events events; @In CacheProvider cacheProvider; Boolean blLoaded = Boolean.FALSE; @Create public void buscar() { if (!blLoaded){ List<Parametro> lstParametro = em.createQuery("select p from Parametro p").getResultList(); for (Parametro parametro : lstParametro){ cacheProvider.put(parametro.getCodigo(), parametro.getValor()); } blLoaded= Boolean.TRUE; } } } Thanks

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