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  • Logic in Entity Components Sytems

    - by aaron
    I'm making a game that uses an Entity/Component architecture basically a port of Artemis's framework to c++,the problem arises when I try to make a PlayerControllerComponent, my original idea was this. class PlayerControllerComponent: Component { public: virtual void update() = 0; }; class FpsPlayerControllerComponent: PlayerControllerComponent { public: void update() { //handle input } }; and have a system that updates PlayerControllerComponents, but I found out that the artemis framework does not look at sub-classes the way I thought it would. So all in all my question here is should I make the framework aware of subclasses or should I add a new Component like object that is used for logic.

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  • Apache stops serving requests when connections increase

    - by Gunjan
    The values for MaxClients, ServerLimit etc parameters are quite high (4000). Available RAM on the server is high too (~8G). Load average remains below 1 on a 24 core CPU. But when the number of visitors on the website increase apache just stops serving requests. The apache error log is blank and access log shows no more requests coming in. Restarting apache makes it work again until the number of requests increases again. Any ideas where to start looking? UPDATE Getting the below errors in apache error log on running it with LogLevel Debug [info] server seems busy, (you may need to increase StartServers, or Min/MaxSpareServers), spawning 32 children, there are 479 idle, and 1027 total children

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  • Do HTTP reverse proxies typically enable HTTP Keep-Alive on the client side of the proxied connection and not on the server side?

    - by LostInComputer
    HAProxy has the ability to enable HTTP keep-alive on the client side (client <- HAProxy) but disable it on the server side (HAProxy <- server). Some of our clients connect to our web service via satellite so the latency is ~600ms and I think that by enabling keep-alive, it will speed things up a bit. Am I right? Is this supported by Nginx? Is this a widely implemented feature in other software and hardware load balancers? What else besides HAProxy?

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  • 502 errors with apache mod_proxy hot standby (or equivalent)

    - by 6million
    Anyone knows how to configure the hot standby (+H) mod_proxy feature so that the takeover occurs immediately (without even one user receiving a 502) error during a shutdown? We aren't looking for real load-balancing, we just want a secondary server to take over while we shutdown the primary. The problem is that whenever the primary goes down, I'm able to slip one invalid request resulting in a 502 HTTP error reaching the end user,before the secondary actually takes over. Listen 80 <VirtualHost 127.0.0.1:80> ServerName domain.com ProxyPass / balancer://balance/ <Proxy balancer://balance/> BalancerMember http://primary_ip:80 BalancerMember http://secondary_ip:80 status=+H </Proxy> </VirtualHost>

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  • How to load chunks of 2d map segments when player reaches a certain point?

    - by 2kan
    In my 2d platformer (made with Java and Slick2d), random maps are made by combining different segments together and displaying them one after the other. My problem is that I can't load too many segments or the game will run out of memory, so I want to load n number of segments at a time in chunks, then load the next chunk when the player comes near the end of one. I've attempted to do this for a couple of hours now, but I just can't get it to work at all. This is my chunk generation function where chunkLoad is the number of segments to load and BLOCK_WIDTH is the number of blocks/tiles each segment is across. Chunk1 and map are arrays of segments. Random r = new Random(); for(int i=0; i<chunkLoad; i++) { int id = r.nextInt(4)+2; chunk1[i] = new BlockMap("res/window/map"+id+".tmx", i*BLOCK_WIDTH); } map = chunk1; chunksLoaded++; The map is then drawn on the screen like this. tmap is a TiledMap object and each block/tile is 16 pixels wide for(int i=0; i<chunkLoad; i++) { map[i].tmap.render((i * BLOCK_WIDTH * 16) + (cameraX), 0); } I can successfully load new chunks, but I can't display them in the correct position, nor the hitboxes. Any suggestions? Thanks.

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  • How to make Ubuntu 14.04 run with less lag?

    - by King Shimkus
    I recently updated from Ubuntu 12.04 LTS to 14.04 LTS and for the first time it worked! However, whenever I move my mouse over an application icon on the unity shell, the animation takes forever to show me what the name of the application is ( A.k.a the tooltip ). The same happens with menus and sub-menus. Other than that, it is overall in general, slow. I just want to know if there are any tips to fix this or make my system faster. This is what it says when I type in glxinfo | grep renderer: GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.4, 128 bits) Output of lspci | grep VGA: 00:02.0 VGA compatible controller: Intel Corporation 82865G Integrated Graphics Controller (rev 02)

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  • How to choose NoSQL database engine?

    - by Poma
    We have a database with following specs: 30k records, 7mb in size 20 inserts/second 1000 updates/second 1000 range selects/second, by secondary index, approx 10 rows each needs at least one secondary index needs some mechanism to expire keys if they are not updated for 75 secs (can be done via programmatic garbage collector but will require additional 'last_update' index and will add some load) consistency is not required durability is not required db should be stored in memory For now we use Redis, but it does not have secondary index and it's keys index:foo:* is too slow. Membase also does not have secondary index (as far as I know). MongoDB and MySQL memory engine have table-level locks. What engine will fit our use case?

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  • What would be the market life of a JVM based software framework?

    - by Nav
    I saw how Struts 1 lasted from 2000 to 2013. I hear that people are moving from Struts 2 to Spring. But for a project that may need to be maintained for a decade or two, would it be advisable to opt for a framework or directly code with servlets and jquery? Can a system architecture really be designed keeping in mind a particular framework? What really is the market life of a framework? Do the creators of the framework create it with the assumption that it would become obsolete in a decade?

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  • What exactly is a chroot? Is it similar to a simultaneous dual boot?

    - by mathematician1975
    It has been suggested to me that the use of a chroot might solve my problem of building an application that must run on an embedded device. I have inferred from this description that it is somehow similar to creating the embedded environment locally on my machine which I can then use to develop on from my desktop development machine. Is this the right way to look at the functionality or have I totally misunderstood? In order to get some idea of how it works I read this https://wiki.ubuntu.com/DebootstrapChroot which I will attempt to make a chroot for an old Ubuntu version on my machine. However, as I am a total linux novice, I am a bit concerned that as I do not entirely know what I am doing is there anyway that I could end up with an unusable system?? Is this something that a novice should even attempt???

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  • Super slow and laggy?

    - by Mystogan
    I'm a native Windows user, running 7 Home Premium atm. In the past I installed Ubuntu 10 on my netbook I believe, but was a bit 'scared' by it. Anyways, I made a partition on my desktop pc, 100gb and installed Ubuntu 12.10 on it. It was pretty slow first thought it had to install updates or something, so I rebooted it. Now after the login it looks like everything freezes, I can move my mouse only ,but that's it! I can see my desktop and launcher, but the task bar doesn't display time and misc system info, only a black bar, I downloaded the android SDK pack and installed vlc media player before I rebooted. My computer info: - 1tb HDD - 8gb ddr3 ram - ATI Radeon 4890 videocard (1gb) - AMD Phenom 2 x4 black 3,2ghz CPU(64 bits) Thanks in advantage!

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  • Ubuntu 14.04 crashes after several seconds

    - by AndrewJoyce86
    I just installed Ubuntu on my Compaq desktop and everything seemed to go well. The desktop appeared just like it should... Only then this happens, seconds later: Crash Something tells me that this is not supposed to be happening. I did not partition, I replaced Windows 7 with Ubuntu. When I try to run off the USB stick I used, I get this: USB So, what do I do, now? Should I try to reinstall? Is the ISO bad, somehow? System specs: Compaq Model CQ5205Y AMD Semperon LE-1300 2 GB RAM 250 GB HDD

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  • System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse request failed with HTTP status 40

    - by John Galt
    I am trying to make some enhancements to a production web app. After quite a bit of unit testing on my WinXP IIS 5.1 development machine, everything works on my localhost so I used the Visual Studio 2008 PUBLISH dialog on my Dev PC to push the following projects to a staging server: the primary web app the "primary" webservice (the home page tries to invoke this WS) a "secondary" webservice (not yet a problem because home page does not invoke this WS) I get the following when I try to browse to the home page of the web app typing this into my browser: link text Server Error in '/zVersion2' Application. The request failed with HTTP status 404: Not Found. Description: An unhandled exception occurred during the execution of the current web request.Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Net.WebException: The request failed with HTTP status 404: Not Found. Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. Stack Trace: [WebException: The request failed with HTTP status 404: Not Found.] System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall) +431289 System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) +204 ProxyZipeeeService.WSZipeee.Zipeee.GetMessageByType(Int32 iMsgType) in C:\Documents and Settings\johna\My Documents\Visual Studio 2008\Projects\ProxyZipeeeService\ProxyZipeeeService\Web References\WSZipeee\Reference.vb:2168 Zipeee.frmZipeee.LoadMessage() in C:\Documents and Settings\johna\My Documents\Visual Studio 2008\Projects\Zipeee\frmZipeee.aspx.vb:43 Zipeee.frmZipeee.Page_Load(Object sender, EventArgs e) in C:\Documents and Settings\johna\My Documents\Visual Studio 2008\Projects\Zipeee\frmZipeee.aspx.vb:33 System.Web.UI.Control.OnLoad(EventArgs e) +99 System.Web.UI.Control.LoadRecursive() +50 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627 Version Information: Microsoft .NET Framework Version:2.0.50727.3607; ASP.NET Version:2.0.50727.3082 Here is a bit of the corresponding source code: Public wsZipeee As New ProxyZipeeeService.WSZipeee.Zipeee Dim dsStandardMsg As DataSet Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load If Not Page.IsPostBack Then LoadMessage() End If End Sub Private Sub LoadMessage() Dim iCnt As Integer Dim iValue As Integer dsStandardMsg = wsZipeee.GetMessageByType(BizConstants.MsgType.Standard) End Sub I suspect I may have configured things incorrectly on the staging server. The staging server is Win Server 2003 ServicePack 2 running IIS 6.0. When I published the primary site and the 2 webservices on the staging server called MOJITO I created the physical directories for each on the D drive. Then using INETMGR, I configured the following virtual directories: zVersion2 zVersion2wsSQL zVersion2wsEmergency All of the above are configured to use a new application pool I setup and named zVersion2aspNet20. The default web site for this machine MOJITO is configured to use ASP.NET 1.1 and the IP address is set to (All Unassigned). The production versions of the latter 2 webservices run on the MOJITO machine (named ZipeeeService and EmergencyService respectively). Can my staging versions of the above webservices (named zVersion2wsSQL and zVersion2wsEmergency respectively) co-exist on the same web server with the same IP address? Please note that when I test the zVersion2wsSQL webservice independently (from INETMGR right-mouse and click Browse) it works as expected (i.e. presenting all the methods of the webservice) like this snippet: GetMessageByType MessageName="Get_x0020_Message_x0020_By_x0020_Type" I can test this webmethod by clicking on it and it presents the Test dialog (because it takes a simple datatype and I am invoking it on localhost (i.e. MOJITO): **Get Message By Type** **Test** To test the operation using the HTTP POST protocol, click the 'Invoke' button. Parameter Value iMsgType: _______ [INVOKE button] SOAP 1.1 ....etc. I fear I may have rambled with too much information so I will stop but I hope someone can help me as I cannot understand why this request results in a "not found". Thanks.

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  • MVVM load data during or after ViewModel construction?

    - by mkmurray
    My generic question is as the title states, is it best to load data during ViewModel construction or afterward through some Loaded event handling? I'm guessing the answer is after construction via some Loaded event handling, but I'm wondering how that is most cleanly coordinated between ViewModel and View? Here's more details about my situation and the particular problem I'm trying to solve: I am using the MVVM Light framework as well as Unity for DI. I have some nested Views, each bound to a corresponding ViewModel. The ViewModels are bound to each View's root control DataContext via the ViewModelLocator idea that Laurent Bugnion has put into MVVM Light. This allows for finding ViewModels via a static resource and for controlling the lifetime of ViewModels via a Dependency Injection framework, in this case Unity. It also allows for Expression Blend to see everything in regard to ViewModels and how to bind them. So anyway, I've got a parent View that has a ComboBox databound to an ObservableCollection in its ViewModel. The ComboBox's SelectedItem is also bound (two-way) to a property on the ViewModel. When the selection of the ComboBox changes, this is to trigger updates in other views and subviews. Currently I am accomplishing this via the Messaging system that is found in MVVM Light. This is all working great and as expected when you choose different items in the ComboBox. However, the ViewModel is getting its data during construction time via a series of initializing method calls. This seems to only be a problem if I want to control what the initial SelectedItem of the ComboBox is. Using MVVM Light's messaging system, I currently have it set up where the setter of the ViewModel's SelectedItem property is the one broadcasting the update and the other interested ViewModels register for the message in their constructors. It appears I am currently trying to set the SelectedItem via the ViewModel at construction time, which hasn't allowed sub-ViewModels to be constructed and register yet. What would be the cleanest way to coordinate the data load and initial setting of SelectedItem within the ViewModel? I really want to stick with putting as little in the View's code-behind as is reasonable. I think I just need a way for the ViewModel to know when stuff has Loaded and that it can then continue to load the data and finalize the setup phase. Thanks in advance for your responses.

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  • jQuery .load() not working in Chrome

    - by Skilldrick
    .load() was working fine, but for some reason it's not in Chrome now (presumably some kind of update). I'm on Chrome 5.0.375.55. I've isolated the problem to this: index.htm <html> <head> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script> <script type="text/javascript"> $(document).ready(function () { $('#reader').load('test.htm'); }); </script> </head> <body> <div id='reader'>Loading ...</div> </body> </html> test.htm <h1>Loaded successfully</h1> This works on Firefox and IE, but on Chrome it replaces the contents of the #reader div with nothing.

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  • ASP.NET + jQuery UI Modal: load aspx page into modal dialog

    - by kilonet
    I need to load aspx page into jQuery UI's modal dialog window. I used following approach: load page content via ajax call into dialog's div and show it: $.get('Page.aspx', function(response){ $('#dialog').html(response); $("#dialog").dialog('open'); }); but I've got very strange error (IE8) in line 137215738 (!): 'theForm.elements.length' - is null or not an object. JS debbuger says that source code is not available for such location. I have an assumption that this error happens because of multiple 'form' tags that appears on page after ajax call I wonder, how can i fix this? Or maybe some other way of showing aspx page in modal dialog?

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  • No such file to load bundler error for Rails 3

    - by kgpdeveloper
    I have a Rails 3 app ready for staging. I haven't got a VPS host set up yet. As I was planning to have everything on shared host for the first few months. Problem: cd myapp bundle check result: The Gemfile's dependencies are satisfied Passenger error: Error message: no such file to load -- bundler Exception class: LoadError Frustrating thing about shared hosts is that I have to add these lines on config.ru: ENV['GEM_HOME'] = '/home/username/.gems' ENV['GEM_PATH'] = '$GEM_HOME:/usr/lib/ruby/gems/1.8' Still no luck. Same no such file to load bundler error appears. Has anybody got this working? Rails 3, Debian, shared host (dreamhost)? I could just go ahead and register on Slicehost/Fivebean but before I do, I'd like to know why that error is showing up. Thanks.

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  • Android "Hello, MapView" Tutorial - Map Tiles Do Not Load

    - by Onyx
    I am new to Android software development and new to this site. I am hoping someone might have some experience with the problem I am having. I've been following the Hello, MapView tutorial in order to not only learn the Android framework, but also the Google Maps library. I've tried my best to implement things exactly as the tutorial has instructed. My problem is that the application does load in my emulator (or even on my phone for that matter), but the map tiles do not load. Searching Google I found a post by someone else on another site having the same issue, but his/her problem was that the important elements added to the AndroidManifest.xml file were not in the right order. I double-checked this in mine, but everything seems to be right. So, I am not sure what the issue is and was hoping others have seen this before. I can provide any snippets of code, if that would help. Thank you.

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  • jquery slide down image on page load

    - by Dean
    Hi I'm not experienced with jquery (or java script really), but trying to make an image (img id=mike ...) slide in when a page loads. After looking through the jquery docs and trying Google queries, I have so far come up with this $(document).ready(function() { $("#mike").load(function () { $(this).show("slide", { direction: "up" }, 2000); }); }); And applied the CSS display:hidden so it remains hidden until I want it to slide in on page load. This doesn't seem to work unless I reload the page though. Hoping someone could help me out with this please :)

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  • Load content while scrolling a div with jquery

    - by enfix
    I need to load content while scrolling a div, not window. That's my CSS code: #sidebar{ width:30%; float:right; height:455px; } #video_list{ height:100%; overflow:auto; } And this is my html code: <div id="sidebar" > <!-- other --> <div id="video_list"> </div> </div> Video_list is scrollable and the content is loaded by ajax call. When I go to the end of scrollbar i need to load content again. How can i determine the height of scrollable div ? I tried this: if ($("#video_list").scrollTop()==$("#video_list").height()){ loadContent(); } but it doesn't work !

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  • Microsoft Reporting v.10 load problem

    - by Branko
    Hi, I am trying to reference microsoft reporting v.10.0.0.0 in my vs studio web site. For some reason it can't achieve that as it is always giving me a compile error that it could not load the type. Error 2625 Could not load type 'Microsoft.Reporting.RdlBuildProvider' from assembly 'Microsoft.ReportViewer.Common, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' One thing that I think it might be a cause is that I had moved from 9.0.0.0 to 10.0.0.0 and after that it does not work. Any suggestions? Thanks a lot!

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  • Dataset -> XML Document - Load DataSet into an XML Document - C#.Net

    - by NLV
    Hello I'm trying to read a dataset as xml and load it into an XML Document. XmlDocument contractHistoryXMLSchemaDoc = new XmlDocument(); using (MemoryStream ms = new MemoryStream()) { //XmlWriterSettings xmlWSettings = new XmlWriterSettings(); //xmlWSettings.ConformanceLevel = ConformanceLevel.Auto; using (XmlWriter xmlW = XmlWriter.Create(ms)) { xmlW.WriteStartDocument(); dsContract.WriteXmlSchema(xmlW); xmlW.WriteEndDocument(); xmlW.Close(); using (XmlReader xmlR = XmlReader.Create(ms)) { contractHistoryXMLSchemaDoc.Load(xmlR); } } } But I'm getting the error - "Root Element Missing". Any ideas? Update When i do xmlR.ReadInnerXML() it is empty. Does anyone know why? NLV

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  • How to load jqtouch on-demand

    - by Jayson P.
    I'm trying to load jqtouch on-demand like so: <script type="text/javascript" src="js/jquery.js"</script <script type="text/javascript" $(function() { $.getScript("js/jqtouch.min.js", function() { $.jQTouch(); }); }); </script Firebug outputs: $(_3c.selector).tap is not a function If I include jqtouch.min.js in a script, like I did for jquery.js and call $.jQtouch, everything will work correctly. However, I'd like to load jqtouch only when I need to, however I can't seem to get it to work. I also tried doing an ajax post to jqtouch.min.js and received the same error.

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  • URL to load resources from the classpath in Java

    - by Thilo
    In Java, you can load all kinds of resources using the same API but with different URL protocols: file:///tmp.txt http://127.0.0.1:8080/a.properties jar:http://www.foo.com/bar/baz.jar!/COM/foo/Quux.class This nicely decouples the actual loading of the resource from the application that needs the resource, and since a URL is just a String, resource loading is also very easily configurable. Is there a protocol to load resources using the current classloader? This is similar to the Jar protocol, except that I do not need to know which jar file or class folder the resource is coming from. I can do that using Class.getResourceAsStream("a.xml"), of course, but that would require me to use a different API, and hence changes to existing code. I want to be able to use this in all places where I can specify a URL for the resource already, by just updating a property file.

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  • Using constructor to load data in subsonic3?

    - by Dennis
    I'm getting an error while trying to load an record through the constructor. The constructor is: public Document(Expression<Func<Document,bool>> expression); and i try to load a single item in like this var x = new Document(f=>f.publicationnumber=="xxx"); publicationnumber isn't a key but tried making an it an unique key and still no go.. Am i totally wrong regarding the use of the constructor? and can someone please tell me how to use that constructor? The error i'm getting is: Test method TestProject1.UnitTest1.ParseFileNameTwoProductSingleLanguage threw exception: System.NullReferenceException: with the following stacktrace: SubSonic.Query.SqlQuery.Where[T](Expression1` expression) Load`[T]`(T item, Expression1expression) db.Document..ctor(Expression``1 expression) in C:\@Projects\DocumentsSearchAndAdmin\DocumentsSearchAndAdmin\Generated\ActiveRecord.cs: line 5613 rest removed for simplicity Regards Dennis

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