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  • Design issue in Iphone Dev - Generic implementation for Game Bonuses

    - by Idan
    So, I thought consulting you guys about my design, cause I sense there might be a better way of doing it. I need to implement game bonuses mechanism in my app. Currently there are 9 bonuses available, each one is based of different param of the MainGame Object. What I had in mind was at app startup to initialize 9 objects of GameBonus while each one will have different SEL (shouldBonus) which will be responsible for checking if the bonus is valid. So, every end of game I will just run over the bonuses array and call the isBonusValid() function with the MainGame object(which is different after every game). How's that sound ? The only issue I have currently, is that I need to make sure that if some bonuses are accepted some other won't (inner stuff)... any advice how to do that and still maintain generic implementation ? @interface GameBonus : NSObject { int bonusId; NSString* name; NSString* description; UIImage* img; SEL shouldBonus; } @implementation GameBonus -(BOOL) isBonusValid(MainGame*)mainGame { [self shouldBonus:mainGame]; } @end

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  • 401 Unauthorized returned on GET request (https) with correct credentials

    - by Johnny Grass
    I am trying to login to my web app using HttpWebRequest but I keep getting the following error: System.Net.WebException: The remote server returned an error: (401) Unauthorized. Fiddler has the following output: Result Protocol Host URL 200 HTTP CONNECT mysite.com:443 302 HTTPS mysite.com /auth 401 HTTP mysite.com /auth This is what I'm doing: // to ignore SSL certificate errors public bool AcceptAllCertifications(object sender, System.Security.Cryptography.X509Certificates.X509Certificate certification, System.Security.Cryptography.X509Certificates.X509Chain chain, System.Net.Security.SslPolicyErrors sslPolicyErrors) { return true; } try { // request Uri uri = new Uri("https://mysite.com/auth"); HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri) as HttpWebRequest; request.Accept = "application/xml"; // authentication string user = "user"; string pwd = "secret"; string auth = "Basic " + Convert.ToBase64String(System.Text.Encoding.Default.GetBytes(user + ":" + pwd)); request.Headers.Add("Authorization", auth); ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(AcceptAllCertifications); // response. HttpWebResponse response = (HttpWebResponse)request.GetResponse(); // Display Stream dataStream = response.GetResponseStream(); StreamReader reader = new StreamReader(dataStream); string responseFromServer = reader.ReadToEnd(); Console.WriteLine(responseFromServer); // Cleanup reader.Close(); dataStream.Close(); response.Close(); } catch (WebException webEx) { Console.Write(webEx.ToString()); } I am able to log in to the same site with no problem using ASIHTTPRequest in a Mac app like this: NSURL *login_url = [NSURL URLWithString:@"https://mysite.com/auth"]; ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:login_url]; [request setDelegate:self]; [request setUsername:name]; [request setPassword:pwd]; [request setRequestMethod:@"GET"]; [request addRequestHeader:@"Accept" value:@"application/xml"]; [request startAsynchronous];

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  • Tablet interface for the physically disabled?

    - by Glenn
    My sister has Cerebral Palsy, which in her case means she has only gross motor control and her speech is slurred. Implications should be obvious: traditional computer/phone/tablet interfaces won't work for her and she can't speak clearly enough for speech recognition software to help her at all. She enjoys reading but has difficulty holding the book and/or turning a page. There are a few options for helping her use a computer, but nothing for tablets or eReaders. That's where you come in. I would like to make (or buy, if such a thing exists) a better interface to an Android tablet that would work for someone with little to no physical dexterity or speech ability. I'd also be interested in work on the Kindle or iPad, but I'm most familiar with Android so I'm starting there. I know Android has Bluetooth capability. Is it possible to interface a joystick to control the Android device? By "control", I mean the entire operating system - selecting an app, launching it, controlling the menus, etc. I want to give her control over the whole thing, not just a specific app. On a PC this can be accomplished by creating a generic USB HID interface and an arcade joystick to move the mouse over the screen and click on thigns. Is it possible to do something like that in Android? Any help you can offer would be greatly appreciated. Thanks!

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  • Android - Basic CRUD (REST/RPC client) to remote server

    - by bsreekanth
    There are lot of discussion about REST client implementation in android, based on the talk at GoogleIO 2010, by Virgil Dobjanschi. My requirement may not necessarily involved, as I have some freedom to choose the configuration. I only target tablets configuration changes can be prevented if no other easy way (fix at Landscape mode etc) I am trying to achieve. Basic CRUD operation to my server (JSON RPC/ REST). Basically mimic an ajax request from android app (no webview, need native app) Based on the above mentioned talk, and some reading I see these options. Implement any of the 3 mentioned in the Google IO talk Especially, the last pattern may be more suitable as I don't care much of caching. But not sure how "real time" is sync implementation. Use HTTP request in AsyncTask. Simplest, but need to avoid re-sending request during change in device configuration (orientation change etc). Even if I fix at one orientation, recreation of activity still happens. So need to handle it elegantly. Use service to handle http request. So far, it say use service for long ruiing request. Not sure whether it is a good approach for simple GET/POST/PUt requests. Please share your experience on what could be the best way.

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  • CakePHP: Missing database table

    - by Justin
    I have a CakePHP application that is running fine locally. I uploaded it to a production server and the first page that uses a database connection gives the "Missing Database Table" error. When I look at the controller dump, it's complaining about the first table. I've tried a variety of things to fix this problem, with no luck: I've confirmed that at the command line I can login with the given MySQL credentials in database.php I've confirmed this table exists I've tried using the MySQL root credentials (temporarily) to see if the problem lies with permissions of the user. The same error appeared. My debug level is currently set to 3 I've deleted the entire contents of /app/tmp/cache I've set 777 permissions on /app/tmp* I've confirmed that I can run DESCRIBE commands at the commant line MySQL when logged in with the MySQL credentials used by by the application I've verified that the CakePHP log file only contains the error I'm setting in the browser window. I've tried all the suggestions I could find in similar postings on SO I've Googled around and didn't find any other ideas I think I've eliminating the obvious problems and my research isn't turning anything up. I feel like I'm missing something obvious. Any ideas?

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  • Cannot write to SD card -- canWrite is returning false

    - by Fizz
    Sorry for the ambiguous title but I'm doing the following to write a simple string to a file: try { File root = Environment.getExternalStorageDirectory(); if (root.canWrite()){ System.out.println("Can write."); File def_file = new File(root, "default.txt"); FileWriter fw = new FileWriter(def_file); BufferedWriter out = new BufferedWriter(fw); String defbuf = "default"; out.write(defbuf); out.flush(); out.close(); } else System.out.println("Can't write."); }catch (IOException e) { e.printStackTrace(); } But root.canWrite() seems to be returning false everytime. I am not running this off of an emulator, I have my android Eris plugged into my computer via USB and running the app off of my phone via Eclipse. Is there a way of giving my app permission so this doesn't happen? Also, this code seems to be create the file default.txt but what if it already exists, will it ignore the creation and just open it to write or do I have to catch something like FileAlreadyExists(if such an exception exists) which then just opens it and writes? Thanks for any help guys.

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  • stop background of iphone webapp from responding to swipes

    - by JoeS
    I'm making a mobile version of my website, and trying to make it feel as native as possible on the iphone. However, any background areas of the page respond to swiping gestures such that you can shift the page partway off the screen. Specifically, if the user touches and swipes left, for example, the content shifts off the edge of the screen and one can see a gray background 'behind' the page. How can this be prevented? I'd like to have the page itself be 320x480 with scroll-swiping disabled (except on list elements that I choose). I have added the following meta tags to the top of the page: <meta name="viewport" content="width=320; height=480; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;"/> <meta name="apple-mobile-web-app-capable" content="yes" /> <meta name="apple-mobile-web-app-status-bar-style" content="black" /> I've also tried the following as the event handler for the touchstart, touchmove, and touchend events of the body element: function cancelTouchEvent(e) { if (!e) var e = window.event; e.cancelBubble = true; if (e.stopPropagation) e.stopPropagation(); if (e.preventDefault) e.preventDefault(); return false; } It doesn't stop the swiping behavior, but does prevent clicks on all links on the page... Any help is much appreciated. Thanks!

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  • Can't use Visual Studio 2008 Designer with MVVMLight V3 SP1

    - by mcauthorn
    I wish I knew what I did to cause this, but I cannot use the Visual Studio 2008 Designer at all with with MVVMLight templates. I receive a "Could not create an instance of type 'ViewModelLocator'. in any of my xaml pages. The application builds and runs fine but only the designer is broken. In the App.xaml is <Application x:Class="ExcelReportGenerator.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:vm="clr-namespace:ExcelReportGenerator.ViewModel" xmlns:res="clr-namespace:ExcelReportGenerator.Resources" Startup="Application_Startup" mc:Ignorable="d"> <Application.Resources> <!--Global View Model Locator--> <vm:ViewModelLocator x:Key="Locator" d:IsDataSource="True" /> </Application.Resources> I even receive the error when I create a brand new MVVMLight application. The interesting thing is if I use an express version of VS2010 I can view, edit and work in designer just fine. As much as I would love to go to VS2010, I can't right now convince IT to make that move.

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  • Dual usage of asp.net mvc and php under same domain

    - by jim
    Hello all, I've got a scenario where we have a customer who has a linux hosted php app (joomla) that they wish to integrate with some back-end asp.net mvc functionality that was created for a 'sister' site. Basically, the mvc site has prices and stock availability methods which (in the sister site) populates dropdown lists and other 'order' style info on the pages. I've been tasked with looking at the integration options to allow the php site to use this info as a 'service'. (as ever, these guys are looking at cost of ownership, maintenence etc, so this is their preferred route) Has anyone done anything similar with success?? I'd imagine (much like the sister site) liberal doses of ajax will be employed in order to populate portions of the page on demand. So this may have a bearing on any suggestions that you may have. Also, the methods that are being called ultimately end up populating the same database, so there are no issues with correlating the ID's across the different platforms. I don't really want to go down any 'iframe' type route if at all possible, tho' reality may dictate this as being an option. I'm possibly (naively) imagining that i could simply invoke the mvc functions directly from the php app with some sort of 'session' variable being passed for authentication. pretty tall order or pretty straightfwd?? cheers jim

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  • How do I relocate assemblies from a deployment project without breaking application references?

    - by James
    Hi, I have recently refactored a lot of my applications existing code and I am now looking at tidying up the deployment side of things. The existing installer application installs everything in the application folder (with the exclusion of a couple of config files which are located in a sub folder). However, I have multiple applications which all use some common assemblies and my goal is to relocate a these particular assemblies to the "Common Files" folder in the program files directory. NB: I have read a lot about the GAC but I have no experience with it and also read a few horror stories, so trying to get a simple solution for the time being. I managed to get the assemblies installed into the Common Files folder, however, as a result (typical I.T.) I have broken my app! If I copy the assemblies back into the application folder it works fine so the problem is obviously to do with how my app is referencing the assemblies. To get the installer to install the assemblies into the Common Files folder I just updated the Folder property of each assembly in the Detected Dependencies list. My thoughts were when I did that the installer would somehow update my application to tell it to look in that folder for them but that doens't appear to be the case. What exactly am I doing wrong here?

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  • database setup for web application

    - by vbNewbie
    I have an application that requires a database and I have already setup tables but not sure if they match the requirements of the app. The app is a crawler which fetches web urls, crawls and stores appropriate urls and posts and all this is based on client requests which are stored as projects. So for each url stored there is one post and for client there are many projects and for each project there are many types of requests. So we get a client with a request and assign them a project name and then use the request to search for content and store the url and post. A request could already exist and should not be duplicated but should be associated with the right client and project and post etc. Here is my schema now: url table: urlId PK queryId FK url post table: postId PK urlId FK post date request table: queryId PK request client table: clientId PK client Name projectId FK project table: projectID PK queryID FK project Does this look right? or does anyone have suggestions. Of course my stored procedures and insert statements will have to be in depth.

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  • Single intent to let user take picture OR pick image from gallery in Android

    - by Damian
    I'm developing an app for Android 2.1 upwards. I want to enable my users to select a profile picture within my app (I'm not using the contacts framework). The ideal solution would be to fire an intent that enables the user to select an image from the gallery, but if an appropriate image is not available then use the camera to take a picture (or vice-versa i.e. allow user to take picture but if they know they already have a suitable image already, let them drop into the gallery and pick said image). Currently I can do one or the other but not both. If I go directly into camera mode using MediaStore.ACTION_IMAGE_CAPTURE then there is no option to drop into the gallery. If I go directly to the gallery using Intent.ACTION_PICK then I can pick an image but if I click the camera button (in top right hand corner of gallery) then a new camera intent is fired. So, any picture that is taken is not returned directly to my application. (Sure you can press the back button to drop back into the gallery and select image from there but this is an extra unnecessary step and is not at all intuitive). So is there a way to combine both or am I going to have to offer a menu to do one or the other from within my application? Seems like it would be a common use case...surely I'm missing something?

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  • Giving another object a NSManagedObject

    - by Wayfarer
    Alright, so I'm running into an issue with my code. What I have done is subclassed UIButton so I can give it some more infomormation that pertain to my code. I have been able to create the buttons and they work great. Capiche. However, one of the things I want my subclass to hold is a reference to a NSMangedObject. I have this code in my header file: @interface ButtonSubclass : UIButton { NSManagedObjectContext *context; NSManagedObject *player; } @property (nonatomic, retain) NSManagedObject *player; @property (nonatomic, retain) NSManagedObjectContext *context; - (id)initWithFrame:(CGRect)frame andTitle:(NSString*)title; //- (void)setPlayer:(NSManagedObject *)aPlayer; @end As you can see, it has a instance variable to the NSMangedobject I want it to hold (as well as the Context). But for the life of me, I can't get it to hold that NSManagedObject. I run both the @synthesize methods in the Implementation file. @synthesize context; @synthesize player; So I'm not sure what I'm doing wrong. This is how I create my button: ButtonSubclass *playerButton = [[ButtonSubclass alloc] initWithFrame:frame andTitle:@"20"]; //works playerButton.context = self.context; //works playerButton.player = [players objectAtIndex:i]; //FAILS And I have initilaized the players array earlier, where I get the objects. Another weird thing is that when it gets to this spot in the code, the app crashes (woot) and the the console output stops. It doesn't give me any error, and notification at all that the app has crashed. It just... stops. So I don't even know what the error is that is crashing the code, besides it has to do with that line up there setting the "player" variable. Thoughts and ideas? I'd love your wisdom!

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  • rabbitmq-erlang-client, using rebar friendly pkg, works on dev env fails on rebar release

    - by lfurrea
    I am successfully using the rebar-friendly package of rabbitmq-erlang-client for a simple Hello World rebarized and OTP "compliant" app and things work fine on the dev environment. I am able to fire up an erl console and do my application:start(helloworld). and connect to the broker, open up a channel and communicate to queues. However, then I proceed to do rebar generate and it builds up the release just fine, but when I try to fire up from the self contained release package then things suddenly explode. I know rebar releases are known to be an obscure art, but I would like to know what are my options as far as deployment for an app using the rabbitmq-erlang-client. Below you will find the output of the console on the crash: =INFO REPORT==== 18-Dec-2012::16:41:35 === application: session_record exited: {{{badmatch, {error, {'EXIT', {undef, [{amqp_connection_sup,start_link, [{amqp_params_network,<<"guest">>,<<"guest">>,<<"/">>, "127.0.0.1",5672,0,0,0,infinity,none, [#Fun<amqp_auth_mechanisms.plain.3>, #Fun<amqp_auth_mechanisms.amqplain.3>], [],[]}], []}, {supervisor2,do_start_child_i,3, [{file,"src/supervisor2.erl"},{line,391}]}, {supervisor2,handle_call,3, [{file,"src/supervisor2.erl"},{line,413}]}, {gen_server,handle_msg,5, [{file,"gen_server.erl"},{line,588}]}, {proc_lib,init_p_do_apply,3, [{file,"proc_lib.erl"},{line,227}]}]}}}}, [{amqp_connection,start,1, [{file,"src/amqp_connection.erl"},{line,164}]}, {hello_qp,start_link,0,[{file,"src/hello_qp.erl"},{line,10}]}, {session_record_sup,init,1, [{file,"src/session_record_sup.erl"},{line,55}]}, {supervisor_bridge,init,1, [{file,"supervisor_bridge.erl"},{line,79}]}, {gen_server,init_it,6,[{file,"gen_server.erl"},{line,304}]}, {proc_lib,init_p_do_apply,3, [{file,"proc_lib.erl"},{line,227}]}]}, {session_record_app,start,[normal,[]]}} type: permanent

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  • Occasional weird Glassfish errors, resolved by a restart?

    - by Pooria
    I'm developing a web app using netbeans with GlassFishv3. Every once in a while when I add a new feature in my app, glassfish starts nagging with stupid errors, after a lot of time wasting and panicking, i restart glassfish and run my application again, then suddenly the errors all go away and my site starts acting correctly. (or in case I have made a real mistake, i receive a reasonable & descriptive error from GF.) [Edit: the rest of the question was revealed to have been my own mistake.] But the problems don't end there. Recently, i added the ability to write comments in a (JSF) page, after the user submits their comment, i add it to the database and redirect to the same page, so that hopefully the page refreshes with the new comment, but it wont! The underlying Mysql database shows that the new comment has been added, but the page just wont show the new comment! I've tried everything (e.g. deleting browser cache, using different browsers) but only after restarting GF is when the page shows the new comment! Do you have any idea what the problem could be? Could this be a Glassfish bug? What i am using: JSF2, EJB3.1, JPA, MySql

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  • Is there a limit for the number of files in a directory on an SD card?

    - by jamesh
    I have a project written for Android devices. It generates a large number of files, each day. These are all text files and images. The app uses a database to reference these files. The app is supposed to clear up these files after a little use (perhaps after a few days), but this process may or may not be working. This is not the subject of this question. Due to a historic accident, the organization of the files are somewhat naive: everything is in the same directory; a .hidden directory which contains a zero byte .nomedia file to prevent the MediaScanner indexing it. Today, I am seeing an error reported: java.io.IOException: Cannot create: /sdcard/.hidden/file-4200.html at java.io.File.createNewFile(File.java:1263) Regarding the sdcard, I see it has plenty of storage left, but counting $ cd /Volumes/NO_NAME/.hidden $ ls | wc -w 9058 Deleting a number of files seems to have allowed the file creation for today to proceed. Regrettably, I did not try touching a new file to try and reproduce the error on a commandline; I also deleted several hundred files rather than a handful. However, my question is: are there hard limits on filesize or number of files in a directory? am I even on the right track here? Nota Bene: The SD card is as-is - i.e. I haven't formatted it, so I would guess it would be a FAT-* format. The FAT-32 format has hard limits of filesize of 2GB (well above the filesizes I am dealing with) and a limit of number of files in the root directory. I am definitely not writing files in the root directory.

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  • Classloader issue (GWT)

    - by Banang
    I'm currently working on a gwt app, where the server uses a few third party libs. recently I discovered that one of these libs isn't being properly loaded when running my app in deployed mode, and I just can't seem to figure out what out is I'm doing wrong. In my build script I have the following classpath declaration: <path id="project.class.path"> <pathelement location="${war.dir}/WEB-INF/classes"/> <fileset dir="${war.dir}/WEB-INF/lib" includes="**/*.jar"/> </path> and in a later target I copy the jar I need to the right location: <copy todir="${war.dir}/WEB-INF/lib" file="someJar.jar" /> The project builds as it should, without any errors. The jars are copied to where the should be, and are included in the resulting war file. In development mode everything is working as it should, everything gets loaded properly and I hear no complaints. However, in the deployed version I get this thrown at me: java.lang.NoClassDefFoundError: org/apache/commons/lang/exception/NestableRuntimeException java.lang.ClassLoader.defineClass1(Native Method) java.lang.ClassLoader.defineClass(ClassLoader.java:621) java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2331) org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:976) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1451) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1329) java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) my.package.server.util.SomeUtils.doSomethingFantastic(SomeUtils.java:84) Line 84 in SomeUtils is trying to instantiate a class from someJar.jar. I know very little about how the class loader for gwt works, and I sure could use a hand. Anyone got any ideas on how to solve this?

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  • Using jQuery tools from within GWT -- is there a way to allow exchanges?

    - by culov
    I have a GWT web-app with a nearly full page Google map window. Inside the the map, I have infowindows which include links. What I want to do is use jquery tools overlays (http://flowplayer.org/tools/overlay/apple.html) to open the overlay and display it on top of the map once the link inside the info window is clicked. Now, the link source is generated dynamically, and it is hosted on a different server, so i have to open it in an iframe and set the source of the iframe before it opens. this seems simple enough since i only have 1 iframe on the page: function changeSource(url){ $("#menuIFrame").attr("src",url); } To call this before opening the overlay (which is done on mouse release), i create the following element in the google maps infowindow via GWT: <a href="http://whatever.com/menu/" onClick="changeSource('http://whatever.com/menu/');" rel=#menu"> View menu </a> Jquery tools works by opening whatever div has the id assigned to the value of 'rel', but because i have my javascript/jquery on my LandingPage.html in GWT, there appears to be some sort of disconnect between the two because the changeSource function is never called AND the overlay is never added to the window. Here's my app: http://truxmapper.appspot.com/ As you can see, the other overlays will work fine, but once you click an infowindow and try to view the menu, it will simply use the href to open the url in that window. Does anyone know of a solution that will allow me to accomplish my goal? Thanks!

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  • MKAnnotations are being made successfully, however they sometimes fail to render on MKMapView

    - by jtkendall
    I'm working on an iPhone app using the 3.1.3 SDK, my app finds the users current location, displays it on a MKMapView and then finds nearby locations and renders them as MKAnnotations. My code is working, however sometimes the nearby annotations do not appear on the map. They are still being made as I see the correct data in the console (from NSLog which runs just after the annotations are made). When it fails is completely random, it could be the 5th time I've hit "Build and Run" for the day, or the 500th it doesn't appear to have any pattern and doesn't throw any type of error, it just doesn't add the annotations to the MapView. This is the method called for each nearby location to add the MKAnnotation. - (void)addPinsWithLocation:(NSDictionary *)spot { CLLocationCoordinate2D location; location.longitude = [[spot objectForKey:@"spot_longitude"] doubleValue]; location.latitude = [[spot objectForKey:@"spot_latitude"] doubleValue]; PlaceMarks *placemark = [[PlaceMarks alloc] initWithCoordinate:location title:[spot objectForKey:@"spot_name"] subtitle:@""]; NSLog(@"Adding Pin for Location: '%@' at %f, %f", [spot objectForKey:@"spot_name"], location.latitude, location.longitude); [mapView addAnnotation:placemark]; } Any ideas on how to get MKAnnotations to always show?

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  • Strategy for locale sensitive sort with pagination

    - by Thom Birkeland
    Hi, I work on an application that is deployed on the web. Part of the app is search functions where the result is presented in a sorted list. The application targets users in several countries using different locales (= sorting rules). I need to find a solution for sorting correctly for all users. I currently sort with ORDER BY in my SQL query, so the sorting is done according to the locale (or LC_LOCATE) set for the database. These rules are incorrect for those users with a locale different than the one set for the database. Also, to further complicate the issue, I use pagination in the application, so when I query the database I ask for rows 1 - 15, 16 - 30, etc. depending on the page I need. However, since the sorting is wrong, each page contains entries that are incorrectly sorted. In a worst case scenario, the entire result set for a given page could be out of order, depending on the locale/sorting rules of the current user. If I were to sort in (server side) code, I need to retrieve all rows from the database and then sort. This results in a tremendous performance hit given the amount of data. Thus I would like to avoid this. Does anyone have a strategy (or even technical solution) for attacking this problem that will result in correctly sorted lists without having to take the performance hit of loading all data? Tech details: The database is PostgreSQL 8.3, the application an EJB3 app using EJB QL for data query, running on JBoss 4.5.

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  • JTA or LOCAL transactions in JPA2+Hibernate 3.6.0?

    - by Pangea
    We are in the process of re-thinking our tech stack and below are our choices (We can't live without Spring and Hibernate due to the complexity etc of the app). We are also moving from J2EE 1.4 to JEE 5. Tech stack JEE 5 JPA 2.0 (I know JEE 5 only supports JPA 1.0 but we want to use Hibernate as the JPA provider) Hibernate 3.6.0 (We already have lots of hbm files with custom types etc. so we doesn't want to migrate them at this time to JPA. This means we want both jpa/hbm mappings work together and hence the Hibernate as the JPA provider instead of using the default that comes with App Server) Now the problems is that I want to stick with local transactions but other team members want to use JTA. I have been working with J2EE for last 9 years and I've heard time and again people suggesting to stick with local transactions if I doesn't need two phase commits. This is not only for performance reasons but debugging/troubleshooting a local transaction is lot easier than a distributed transaction. My suggestion is to use spring declarative transaction management + local transactions (HibernateTransactionManager) I want to make sure if I am being paranoid or I have a valid point. I'd like to hear what the rest of the JEE world thinks. Thank you.

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  • Sparse (Pseudo) Infinite Grid Data Structure for Web Game

    - by Ming
    I'm considering trying to make a game that takes place on an essentially infinite grid. The grid is very sparse. Certain small regions of relatively high density. Relatively few isolated nonempty cells. The amount of the grid in use is too large to implement naively but probably smallish by "big data" standards (I'm not trying to map the Internet or anything like that) This needs to be easy to persist. Here are the operations I may want to perform (reasonably efficiently) on this grid: Ask for some small rectangular region of cells and all their contents (a player's current neighborhood) Set individual cells or blit small regions (the player is making a move) Ask for the rough shape or outline/silhouette of some larger rectangular regions (a world map or region preview) Find some regions with approximately a given density (player spawning location) Approximate shortest path through gaps of at most some small constant empty spaces per hop (it's OK to be a bad approximation often, but not OK to keep heading the wrong direction searching) Approximate convex hull for a region Here's the catch: I want to do this in a web app. That is, I would prefer to use existing data storage (perhaps in the form of a relational database) and relatively little external dependency (preferably avoiding the need for a persistent process). Guys, what advice can you give me on actually implementing this? How would you do this if the web-app restrictions weren't in place? How would you modify that if they were? Thanks a lot, everyone!

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  • wcf trying to set up tracing to debug, not writing to log file

    - by joey j
    here's my web.config, running a WCF service in an application on IIS7, but nothing is being written to the specified file. permission on the file has been granted for everyone. </listeners> I can add a service reference just fine. I then try to call the service from a windows app and, after a few minutes, get an error on the machine running the windows app "Client is unable to finish the security negotiation within the configured timeout (00:00:00). The current negotiation leg is 1 (00:00:00)." but absolutely nothing is written to the trace log file specified in config. Is there something else I need to do to enable tracing? thanks for your help EDIT: "sources" section now matches the section recommended here: http://msdn.microsoft.com/en-us/library/aa702726.aspx I've added the "diagnostics and the event viewer shows: "Message Logging has been turned on. Sensitive information may be logged in the clear, even if it was encrypted on the wire: for example, message bodies. Process Name: w3wp Process ID: 1784 " but the log file is still empty

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  • Problems running XNA game on 64-bit Windows 7

    - by Tesserex
    I'm having problems getting my game engine to run on my brother's machine, which is running 64-bit Windows 7. I'm developing on 32-bit XP SP2. My app uses XNA, FMOD.NET, and another dll I wrote entirely in C#. Everything is targeted to x86, not AnyCPU. I've read that this is required for XNA to work because there is no 64-bit xna framework. I recompiled FMOD.NET as x86 as well and made sure to be using the 32-bit version of the native dll. So I don't see any problems there. However when he tries to run my app, it gives an error which is mysterious, but not unheard of. A FileNotFoundException with an empty file name, and the top of the stack trace is in my main form constructor. The message is The specified module could not be found. (Exception from HRESULT: 0x8007007E) I found some threads online about this error, all with very vague, mixed, and fuzzy responses that don't really help me. Most remind people to target x86. Some say check that they have all the dlls necessary. I gave my brother Microsoft.Xna.Framework.dll, but does he need to install the entire XNA redistributable package? When I take everything I sent him and stick it in a random directory, it still runs fine for me. I developed the game in VS2008, not in game studio, using XNA 3.0 and a Windows Forms control that uses XNA drawing which I found in an msdn tutorial. I would also like to avoid requiring a full installer if possible. Any insight? Please?

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  • need help fixing unique key in rails. rails is adding id causing duplicate key

    - by railsnew
    I need some help in fixing the below issue. I had transaction blocks in my rails code like below: @sqlcontact = "INSERT INTO contacts (id,\"cid\", \"hphone\", mphone, provider, cemail, email, sms , mail, phone) VALUES ('"+@id1+"','" + @id1 + "', '"+ params[:hphone] + "', '"+params[:mphone]+ "', '" + params[:provider] + "', '" + params[:cemail]+ "', '" + @varemail+ "', '"+@varsms+ "', '"+ @varmail+"', '"+@varphone+"')" my app was deployed to heroku so I was advised by them to remove transaction blocks. So I changed the above to: @cont = Contact.new(:id => @id1, :cid => @id1, :hphone => params[:hphone], :mphone => params[:mphone], :provider => params[:provider], :cemail => params[:cemail], :email => @varemail, :sms => @varsms, :mail => @varmail, :phone => @varphone) @cont.save My app also already had data stored. Now the problem is that when I try to save a record ...I keep getting the error: duplicate key value violates unique constraint "contacts_pkey" The error also shows the sql query trying to insert data ...however, in that sql query i Do not see id value. As you can see from my code that I am passing the id. then why is rails not accepting it? does it always include its own sequential id? can I not overwrite the default rails magic? and if it does that...does it not look at data that is already in the DB?? I am really stuck here. What should I do? should I just go back to my transaction block

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