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• Game Database Connectivity Java

  - by The Kraken

  I'm developing a simple multi-player puzzle game in Java. Both players should be able to view the same game board on his own computer. Then, when one player makes an action in the game (ex. drags an object onto a coordinate space), the game's view should update automatically on the other computer's game screen. I'd like all this to happen over the internet, not requiring both computers to be on the same LAN connection. If I need to use SQL/PHP to accomplish this, I'm unsure how to design the database to accomplish something as simple as the following: Player A drags element onscreen Game sends coordinates of element to database/server Player B's computer detects a change to an item in the database Player B's computer grabs the coordinates of Player A's item Player B's machine draws onscreen elements at the received coordinates Could somebody point me in the right direction?

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• ????????

  - by ???02

  ????????Oracle Database VaultOracle Database Vault???????2???????????????????(DBA)???????????·?????????????????????????????????????????????????????????????????????????????????????????????????????????????????? ???????????????????????????????(??????)??????????????????????? Oracle Database Vault????????????DBA????????????????????DBA????????????????????????????? ??????????????????????????????????????Oracle Database Vault??Oracle-EBS?PeopleSoft?Siebel?SAP?????????????????????????????·?????????????????1. Separation of Duties (????)DBA(?????????)????????????????????????????????????????????????????·????? ????·???????????????????????????DBA????????????????????????????????????? ??????????????????Database Vault??DBA?????????????????????????????????????????????????????????????? ?????????????????????????????????????????2. ???(????)???????·?????????????·???????????????????????????????????????????????????????????????????????????????????????????????????????? SELECT/DML/EXECUTE ???????????????????????????????????????????????????????????????????????? DDL ???????????????????????????3. Multi-Factor Access Control Policy Enforcement (???????·??????)Oracle Database Vault???????????????????????????????????????????????????????·???????????????????????????????????????????????????DDL?DML???????????????????????????4. ???????·?????? ???????????????? (ex ???IP??????)??????? ??????????????? "??" or "???" ????????????????1???????????????????? ???·??? ???????????????? ???????????5. ????·???SQL???????????·???????????????·????true ???????????SQL??????????????????? ?????? Oracle Direct

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• Handling incremental Data Modeling Changes in Functional Programming

  - by Adam Gent

  Most of the problems I have to solve in my job as a developer have to do with data modeling. For example in a OOP Web Application world I often have to change the data properties that are in a object to meet new requirements. If I'm lucky I don't even need to programmatically add new "behavior" code (functions,methods). Instead I can declarative add validation and even UI options by annotating the property (Java). In Functional Programming it seems that adding new data properties requires lots of code changes because of pattern matching and data constructors (Haskell, ML). How do I minimize this problem? This seems to be a recognized problem as Xavier Leroy states nicely on page 24 of "Objects and Classes vs. Modules" - To summarize for those that don't have a PostScript viewer it basically says FP languages are better than OOP languages for adding new behavior over data objects but OOP languages are better for adding new data objects/properties. Are there any design pattern used in FP languages to help mitigate this problem? I have read Phillip Wadler's recommendation of using Monads to help this modularity problem but I'm not sure I understand how?

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• How to run unittest for Django?

  - by photon

  I configured properties for my django project under pydev. I can run the django app under pydev or under console window. But I have problems to run unittest under pydev. I cannot run unittest for app under console window either. I guessed it's something related to run configurations of pydev, so I made several trials, but with no success. Once I got messages like this: ImportError: Could not import settings 'D:\django_projects\MyProject' (Is it on sys.path? Does it have syntax errors?): No module named D:\django_projects\MyProject ERROR: Module: MyUnittestFile could not be imported. Another time I got messages like this: ImportError: Could not import settings 'MyProject.settngs' (Is it on sys.path? Does it have syntax errors?): No module named settngs 'ERROR: Module: MyUnittestFile could not be imported. I use pydev 1.5.6 on eclipse and windows xp. Any ideas for this problem? Now I think it's not something related to pydev, thanks for Xavier Ho's suggestion.

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• Given a typical Rails 3 environment, why am I unable to execute any tests?

  - by Tom

  I'm working on writing simple unit tests for a Rails 3 project, but I'm unable to actually execute any tests. Case in point, attempting to run the test auto-generated by Rails fails: require 'test_helper' class UserTest < ActiveSupport::TestCase # Replace this with your real tests. test "the truth" do assert true end end Results in the following error: <internal:lib/rubygems/custom_require>:29:in `require': no such file to load -- test_helper (LoadError) from <internal:lib/rubygems/custom_require>:29:in `require' from user_test.rb:1:in `<main>' Commenting out the require 'test_helper' line and attempting to run the test results in this error: user_test.rb:3:in `<main>': uninitialized constant Object::ActiveSupport (NameError) The action pack gems appear to be properly installed and up to date: actionmailer (3.0.3, 2.3.5) actionpack (3.0.3, 2.3.5) activemodel (3.0.3) activerecord (3.0.3, 2.3.5) activeresource (3.0.3, 2.3.5) activesupport (3.0.3, 2.3.5) Ruby is at 1.9.2p0 and Rails is at 3.0.3. The sample dump of my test directory is as follows: /fixtures /functional /integration /performance /unit -- /helpers -- user_helper_test.rb -- user_test.rb test_helper.rb I've never seen this problem before - I've run the typical rake tasks for preparing the test environment. I have nothing out of the ordinary in my application or environment configuration files, nor have I installed any unusual gems that would interfere with the test environment. Edit Xavier Holt's suggestion, explicitly specifying the path to the test_helper worked; however, this revealed an issue with ActiveSupport. Now when I attempt to run the test, I receive the following error message (as also listed above): user_test.rb:3:in `<main>': uninitialized constant Object::ActiveSupport (NameError) But as you can see above, Action Pack is all installed and update to date.

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• How do you pronounce XAML?

  - by Joan Venge

  Is it EX-A-M-L? Or Examal? Should I just say Xml because it's what it is? Any ideas?

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• how to enable SQL Application Role via Entity Framework

  - by Ehsan Farahani

  I'm now developing big government application with entity framework. at first i have one problem about enable SQL application role. with ado.net I'm using below code: SqlCommand cmd = new SqlCommand("sys.sp_setapprole"); cmd.CommandType = CommandType.StoredProcedure; cmd.Connection = _sqlConn; SqlParameter paramAppRoleName = new SqlParameter(); paramAppRoleName.Direction = ParameterDirection.Input; paramAppRoleName.ParameterName = "@rolename"; paramAppRoleName.Value = "AppRole"; cmd.Parameters.Add(paramAppRoleName); SqlParameter paramAppRolePwd = new SqlParameter(); paramAppRolePwd.Direction = ParameterDirection.Input; paramAppRolePwd.ParameterName = "@password"; paramAppRolePwd.Value = "123456"; cmd.Parameters.Add(paramAppRolePwd); SqlParameter paramCreateCookie = new SqlParameter(); paramCreateCookie.Direction = ParameterDirection.Input; paramCreateCookie.ParameterName = "@fCreateCookie"; paramCreateCookie.DbType = DbType.Boolean; paramCreateCookie.Value = 1; cmd.Parameters.Add(paramCreateCookie); SqlParameter paramEncrypt = new SqlParameter(); paramEncrypt.Direction = ParameterDirection.Input; paramEncrypt.ParameterName = "@encrypt"; paramEncrypt.Value = "none"; cmd.Parameters.Add(paramEncrypt); SqlParameter paramEnableCookie = new SqlParameter(); paramEnableCookie.ParameterName = "@cookie"; paramEnableCookie.DbType = DbType.Binary; paramEnableCookie.Direction = ParameterDirection.Output; paramEnableCookie.Size = 1000; cmd.Parameters.Add(paramEnableCookie); try { cmd.ExecuteNonQuery(); SqlParameter outVal = cmd.Parameters["@cookie"]; // Store the enabled cookie so that approle can be disabled with the cookie. _appRoleEnableCookie = (byte[]) outVal.Value; } catch (Exception ex) { result = false; msg = "Could not execute enable approle proc." + Environment.NewLine + ex.Message; } But no matter how much I searched I could not find a way to implement on EF. Another question is: how to Add Application Role to Entity data model designer? I'm using the below code for execute parameter with EF: AEntities ar = new AEntities(); DbConnection con = ar.Connection; con.Open(); msg = ""; bool result = true; DbCommand cmd = con.CreateCommand(); cmd.CommandType = CommandType.StoredProcedure; cmd.Connection = con; var d = new DbParameter[]{ new SqlParameter{ ParameterName="@r", Value ="AppRole",Direction = ParameterDirection.Input} , new SqlParameter{ ParameterName="@p", Value ="123456",Direction = ParameterDirection.Input} }; string sql = "EXEC " + procName + " @rolename=@r,@password=@p"; var s = ar.ExecuteStoreCommand(sql, d); When run ExecuteStoreCommand this line return error: Application roles can only be activated at the ad hoc level.

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• NSInvalidArgumentException: *** -[NSPlaceholderString initWithFormat:locale:arguments:]: nil argumen

  - by BU

  I have no idea where in my code is causing this problem. Can someone please take a look and let me know what I am missing? The code is relatively straightforward. +(void)processGetGameOffersByGameWithReply:(NSDictionary *)responseDictionary { GameOffer *gameOffer; @try { SharedResources *s = [SharedResources instance]; GameOffersByGameTableViewController *gameOffersByGameTableViewController = [s gameOffersByGameTableViewController]; NSMutableArray *gameOffersArray = [gameOffersByGameTableViewController gameOffersAsArray]; NSString *dealsCountString = [[responseDictionary valueForKey:@"number_of_deals"] retain]; NSNumber *dealsCount = [[SharedResources convertToNumberFromString:dealsCountString] retain]; int i=0; NSString *keyStringForTitle; NSString *title, *description, *keyStringForDescription; for(int i=0; i < dealsCount; i++) { /*NSString *keyStringForDealID = [NSString stringWithFormat:@"DealID%d", i]; NSString *DealIDString = [responseDictionary valueForKey:keyStringForDealID]; NSNumber *DealID = [[SharedResources convertToNumberFromString:DealIDString] retain];*/ keyStringForTitle = [[NSString alloc] initWithFormat:@"Title%d",i] ; title = [[NSString alloc] initWithFormat:[responseDictionary valueForKey:keyStringForTitle]]; //[[responseDictionary valueForKey:keyStringForTitle] retain]; keyStringForDescription = [[NSString alloc] initWithFormat:@"Description%d", i]; description = [[NSString alloc] initWithFormat:[responseDictionary valueForKey:keyStringForDescription]]; /*NSString *keyStringForGameID = [NSString stringWithFormat:@"GameID%d", i]; NSString *GameIDString = [responseDictionary valueForKey:keyStringForGameID]; NSNumber *GameID = [[SharedResources convertToNumberFromString:GameIDString] retain];*/ gameOffer = [[GameOffer alloc] initWithTitle:title Description:description Image:nil]; //int i =0; SharedResources *s = [SharedResources instance]; [gameOffersArray addObject:[gameOffer retain]]; int j=0; } NSString *temp = nil; int k = 0; //find the navigation controller UINavigationController *myNavigationController = [[s gamesTableViewController] navigationController]; //push the table view controller to the navigation controller; [myNavigationController pushViewController:gameOffersByGameTableViewController animated:YES]; } @catch (NSException *ex) { NSLog(@"Count is %d", [[[[SharedResources instance] gameOffersByGameTableViewController] gameOffersAsArray] count]); NSLog(@"\n%@\n%@", [gameOffer Title], [gameOffer Description] ); [SharedResources LogException:ex]; } } The problem is whenever the program gets done with the for loop, it doesn't execute the "NSString *temp=nil" anymore, it jumps to the catch statement. I tried removing the for loop setting i = 0. The problem doesn't occur anymore. It reaches teh end of the method by adding only one object in the array. The problem only occurs if there's a for loop. In the catch statement, even with the error, I can see that the array is filled properly and the [gameOffer Title] and [gameOffer Description] have the correct values. Thanks so much for your help.

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• C# remote web request certificate error

  - by Ben

  Hi. I am currently integrating a payment gateway into an application. Following a successful transaction the remote payment gateway posts details of the transaction back to my application (ITN). It posts to a HttpHandler that is used to read and validate the data. Part of the validation performed is a POST made by the handler to a validation service provided by the payment gateway. This effectively posts some of the original form values received back to the payment gateway to ensure they are valid. The url that I am posting back to is: "https://sandbox.payfast.co.za/eng/query/validate" and the code I am using: /// <summary> /// Posts the data back to the payment processor to validate the data received /// </summary> public static bool ValidateITNRequestData(NameValueCollection formVariables) { bool isValid = true; try { using (WebClient client = new WebClient()) { string validateUrl = (UseSandBox) ? SandboxValidateUrl : LiveValidateUrl; byte[] responseArray = client.UploadValues(validateUrl, "POST", formVariables); // get the resposne and replace the line breaks with spaces string result = Encoding.ASCII.GetString(responseArray); result = result.Replace("\r\n", " ").Replace("\r", "").Replace("\n", " "); if (result == null || !result.StartsWith("VALID")) { isValid = false; LogManager.InsertLog(LogTypeEnum.OrderError, "PayFast ITN validation failed", "The validation response was not valid."); } } } catch (Exception ex) { LogManager.InsertLog(LogTypeEnum.Unknown, "Unable to validate ITN data. Unknown exception", ex); isValid = false; } return isValid; } However, on calling WebClient.UploadValues the following exception is raised: System.Net.WebException: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. ---> System.Security.Authentication.AuthenticationException: The remote certificate is invalid according to the validation procedure. at System.Net.Security.SslState.StartSendAuthResetSignal(ProtocolToken message, AsyncProtocolRequest asyncRequest, Exception exception) at For the sake of brevity I haven't listed the full call stack (I can do if anyone thinks it will help). The remote certificate does appear to be valid. To get around the problem I did try adding a new RemoteCertificateValidationCallback that always returned true but just ended up getting the following exception: System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. at System.Security.CodeAccessSecurityEngine.Check(Object demand, StackCrawlMark& stackMark, Boolean isPermSet) at System.Security.CodeAccessPermission.Demand() at System.Net.ServicePointManager.set_ServerCertificateValidationCallback(RemoteCertificateValidationCallback value) at NopSolutions.NopCommerce.Payment.Methods.PayFast.PayFastPaymentProcessor.ValidateITNRequestData(NameValueCollection formVariables) The action that failed was: Demand The type of the first permission that failed was: System.Security.Permissions.SecurityPermission The Zone of the assembly that failed was: MyComputer So I am not sure this will work in medium trust? Any help would be much appreciated. Thanks Ben

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• Can I read an Outlook (2003/2007) PST file in C#?

  - by Andy May

  Is it possible to read a .PST file using C#? I would like to do this as a standalone application, not as an Outlook addin (if that is possible). If have seen other SO questions similar to this mention MailNavigator but I am looking to do this programmatically in C#. I have looked at the Microsoft.Office.Interop.Outlook namespace but that appears to be just for Outlook addins. LibPST appears to be able to read PST files, but this is in C (sorry Joel, I didn't learn C before graduating). Any help would be greatly appreciated, thanks! EDIT: Thank you all for the responses! I accepted Matthew Ruston's response as the answer because it ultimately led me to the code I was looking for. Here is a simple example of what I got to work (You will need to add a reference to Microsoft.Office.Interop.Outlook): using System; using System.Collections.Generic; using Microsoft.Office.Interop.Outlook; namespace PSTReader { class Program { static void Main () { try { IEnumerable<MailItem> mailItems = readPst(@"C:\temp\PST\Test.pst", "Test PST"); foreach (MailItem mailItem in mailItems) { Console.WriteLine(mailItem.SenderName + " - " + mailItem.Subject); } } catch (System.Exception ex) { Console.WriteLine(ex.Message); } Console.ReadLine(); } private static IEnumerable<MailItem> readPst(string pstFilePath, string pstName) { List<MailItem> mailItems = new List<MailItem>(); Application app = new Application(); NameSpace outlookNs = app.GetNamespace("MAPI"); // Add PST file (Outlook Data File) to Default Profile outlookNs.AddStore(pstFilePath); MAPIFolder rootFolder = outlookNs.Stores[pstName].GetRootFolder(); // Traverse through all folders in the PST file // TODO: This is not recursive, refactor Folders subFolders = rootFolder.Folders; foreach (Folder folder in subFolders) { Items items = folder.Items; foreach (object item in items) { if (item is MailItem) { MailItem mailItem = item as MailItem; mailItems.Add(mailItem); } } } // Remove PST file from Default Profile outlookNs.RemoveStore(rootFolder); return mailItems; } } } Note: This code assumes that Outlook is installed and already configured for the current user. It uses the Default Profile (you can edit the default profile by going to Mail in the Control Panel). One major improvement on this code would be to create a temporary profile to use instead of the Default, then destroy it once completed.

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• HTTP client - HTTP 405 error "Method not allowed". I send a HTTP Post but for some reason HTTP Get i

  - by Shino88

  Hey I am using apache library. I have created a class which sends a post request to a servlet. I have set up the parameters for the client and i have created a HTTP post object to be sent but for some reason when i excute the request i get a reposnse that says the get method is not supported(which is true cause i have only made a dopost method in my servlet). It seems that a get request is being sent but i dont know why. The post method worked before but i started gettng http error 417 "Expectation Failed" which i fixed by adding paramenters. below is my class with the post method. P.s i am developing for android. public class HTTPrequestHelper { private final ResponseHandler<String> responseHandler; private static final String CLASSTAG = HTTPrequestHelper.class.getSimpleName(); private static final DefaultHttpClient client; static{ HttpParams params = new BasicHttpParams(); params.setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1); params.setParameter(CoreProtocolPNames.HTTP_CONTENT_CHARSET, HTTP.UTF_8); ///params.setParameter(CoreProtocolPNames.USER_AGENT, "Android-x"); params.setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 15000); params.setParameter(CoreConnectionPNames.STALE_CONNECTION_CHECK, false); SchemeRegistry schemeRegistry = new SchemeRegistry(); schemeRegistry.register( new Scheme("http", PlainSocketFactory.getSocketFactory(), 80)); schemeRegistry.register( new Scheme("https", SSLSocketFactory.getSocketFactory(), 443)); ThreadSafeClientConnManager cm = new ThreadSafeClientConnManager(params, schemeRegistry); client = new DefaultHttpClient(cm,params); } public HTTPrequestHelper(ResponseHandler<String> responseHandler) { this.responseHandler = responseHandler; } public void performrequest(String url, String para) { HttpPost post = new HttpPost(url); StringEntity parameters; try { parameters = new StringEntity(para); post.setEntity(parameters); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } BasicHttpResponse errorResponse = new BasicHttpResponse( new ProtocolVersion("HTTP_ERROR", 1, 1), 500, "ERROR"); try { client.execute(post, this.responseHandler); } catch (Exception e) { errorResponse.setReasonPhrase(e.getMessage()); try { this.responseHandler.handleResponse(errorResponse); } catch (Exception ex) { Log.e( "ouch", "!!! IOException " + ex.getMessage() ); } } } I tried added the allow header to the request but that did not work as well but im not sure if i was doing right. below is the code. client.addRequestInterceptor(new HttpRequestInterceptor() { @Override public void process(HttpRequest request, HttpContext context) throws HttpException, IOException { //request.addHeader("Allow", "POST"); } });

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• Java Process "The pipe has been ended" problem

  - by Amit Kumar

  I am using Java Process API to write a class that receives binary input from the network (say via TCP port A), processes it and writes binary output to the network (say via TCP port B). I am using Windows XP. The code looks like this. There are two functions called run() and receive(): run is called once at the start, while receive is called whenever there is a new input received via the network. Run and receive are called from different threads. The run process starts an exe and receives the input and output stream of the exe. Run also starts a new thread to write output from the exe on to the port B. public void run() { try { Process prc = // some exe is `start`ed using ProcessBuilder OutputStream procStdIn = new BufferedOutputStream(prc.getOutputStream()); InputStream procStdOut = new BufferedInputStream(prc.getInputStream()); Thread t = new Thread(new ProcStdOutputToPort(procStdOut)); t.start(); prc.waitFor(); t.join(); procStdIn.close(); procStdOut.close(); } catch (Exception e) { e.printStackTrace(); printError("Error : " + e.getMessage()); } } The receive forwards the received input from the port A to the exe. public void receive(byte[] b) throws Exception { procStdIn.write(b); } class ProcStdOutputToPort implements Runnable { private BufferedInputStream bis; public ProcStdOutputToPort(BufferedInputStream bis) { this.bis = bis; } public void run() { try { int bytesRead; int bufLen = 1024; byte[] buffer = new byte[bufLen]; while ((bytesRead = bis.read(buffer)) != -1) { // write output to the network } } catch (IOException ex) { Logger.getLogger().log(Level.SEVERE, null, ex); } } } The problem is that I am getting the following stack inside receive() and the prc.waitfor() returns immediately afterwards. The line number shows that the stack is while writing to the exe. The pipe has been ended java.io.IOException: The pipe has been ended at java.io.FileOutputStream.writeBytes(Native Method) at java.io.FileOutputStream.write(FileOutputStream.java:260) at java.io.BufferedOutputStream.write(BufferedOutputStream.java:105) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65) at java.io.BufferedOutputStream.write(BufferedOutputStream.java:109) at java.io.FilterOutputStream.write(FilterOutputStream.java:80) at xxx.receive(xxx.java:86) Any advice about this will be appreciated.

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• NullReferenceException when calling InsertOnSubmit in Linq to Sql.

  - by Charlie

  I'm trying to insert a new object into my database using LINQ to SQL but get a NullReferenceException when I call InsertOnSubmit() in the code snippet below. I'm passing in a derived class called FileUploadAudit, and all properties on the object are set. public void Save(Audit audit) { try { using (ULNDataClassesDataContext dataContext = this.Connection.GetContext()) { if (audit.AuditID > 0) { throw new RepositoryException(RepositoryExceptionCode.EntityAlreadyExists, string.Format("An audit entry with ID {0} already exists and cannot be updated.", audit.AuditID)); } dataContext.Audits.InsertOnSubmit(audit); dataContext.SubmitChanges(); } } catch (Exception ex) { if (ObjectFactory.GetInstance<IExceptionHandler>().HandleException(ex)) { throw; } } } Here's the stack trace: at System.Data.Linq.Table`1.InsertOnSubmit(TEntity entity) at XXXX.XXXX.Repository.AuditRepository.Save(Audit audit) C:\XXXX\AuditRepository.cs:line 25" I've added to the Audit class like this: public partial class Audit { public Audit(string message, ULNComponent component) : this() { this.Message = message; this.DateTimeRecorded = DateTime.Now; this.SetComponent(component); this.ServerName = Environment.MachineName; } public bool IsError { get; set; } public void SetComponent(ULNComponent component) { this.Component = Enum.GetName(typeof(ULNComponent), component); } } And the derived FileUploadAudit looks like this: public class FileUploadAudit : Audit { public FileUploadAudit(string message, ULNComponent component, Guid fileGuid, string originalFilename, string physicalFilename, HttpPostedFileBase postedFile) : base(message, component) { this.FileGuid = fileGuid; this.OriginalFilename = originalFilename; this.PhysicalFileName = physicalFilename; this.PostedFile = postedFile; this.ValidationErrors = new List<string>(); } public Guid FileGuid { get; set; } public string OriginalFilename { get; set; } public string PhysicalFileName { get; set; } public HttpPostedFileBase PostedFile { get; set; } public IList<string> ValidationErrors { get; set; } } Any ideas what the problem is? The closest question I could find to mine is here but my partial Audit class is calling the parameterless constructor in the generated code, and I still get the problem. UPDATE: This problem only occurs when I pass in the derived FileUploadAudit class, the Audit class works fine. The Audit class is generated as a linq to sql class and there are no Properties mapped to database fields in the derived class.

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• How to resovle javax.mail.AuthenticationFailedException issue?

  - by jl

  Hi, I am doing a sendMail Servlet with JavaMail. I have javax.mail.AuthenticationFailedException on my output. Can anyone please help me out? Thanks. sendMailServlet code: try { String host = "smtp.gmail.com"; String from = "[email protected]"; String pass = "pass"; Properties props = System.getProperties(); props.put("mail.smtp.starttls.enable", "true"); props.put("mail.smtp.host", host); props.put("mail.smtp.user", from); props.put("mail.smtp.password", pass); props.put("mail.smtp.port", "587"); props.put("mail.smtp.auth", "true"); props.put("mail.debug", "true"); Session session = Session.getDefaultInstance(props, null); MimeMessage message = new MimeMessage(session); Address fromAddress = new InternetAddress(from); Address toAddress = new InternetAddress("[email protected]"); message.setFrom(fromAddress); message.setRecipient(Message.RecipientType.TO, toAddress); message.setSubject("Testing JavaMail"); message.setText("Welcome to JavaMail"); Transport transport = session.getTransport("smtp"); transport.connect(host, from, pass); message.saveChanges(); Transport.send(message); transport.close(); }catch(Exception ex){ out.println("<html><head></head><body>"); out.println("ERROR: " + ex); out.println("</body></html>"); } Output on GlassFish 2.1: DEBUG SMTP: trying to connect to host "smtp.gmail.com", port 587, isSSL false 220 mx.google.com ESMTP 36sm10907668yxh.13 DEBUG SMTP: connected to host "smtp.gmail.com", port: 587 EHLO platform-4cfaca 250-mx.google.com at your service, [203.126.159.130] 250-SIZE 35651584 250-8BITMIME 250-STARTTLS 250-ENHANCEDSTATUSCODES 250 PIPELINING DEBUG SMTP: Found extension "SIZE", arg "35651584" DEBUG SMTP: Found extension "8BITMIME", arg "" DEBUG SMTP: Found extension "STARTTLS", arg "" DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg "" DEBUG SMTP: Found extension "PIPELINING", arg "" STARTTLS 220 2.0.0 Ready to start TLS EHLO platform-4cfaca 250-mx.google.com at your service, [203.126.159.130] 250-SIZE 35651584 250-8BITMIME 250-AUTH LOGIN PLAIN 250-ENHANCEDSTATUSCODES 250 PIPELINING DEBUG SMTP: Found extension "SIZE", arg "35651584" DEBUG SMTP: Found extension "8BITMIME", arg "" DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN" DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg "" DEBUG SMTP: Found extension "PIPELINING", arg "" DEBUG SMTP: Attempt to authenticate AUTH LOGIN 334 VXNlcm5hbWU6 aWpveWNlbGVvbmdAZ21haWwuY29t 334 UGFzc3dvcmQ6 MTIzNDU2Nzhf 235 2.7.0 Accepted DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc] DEBUG SMTP: useEhlo true, useAuth true

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• Complex(?) regex: Is expression, but not another

  - by Kieron

  (If you can make a better title, please do) Hi, I need to make sure a string matches the following regex: ^[0-9a-zA-Z]{1}[0-9a-zA-Z\.\-_]*$ (Starts with a letter or number, then any number of letters, numbers, dots, dashes or underscores) But given that, I need to make sure it doesn't match a Guid, my Guid matching reg-ex looks like this (obviously, this needs to be negated in the merged result): ^([0-9a-fA-F]){8}-([0-9a-fA-F]){4}-([0-9a-fA-F]){4}-([0-9a-fA-F]){4}-([0-9a-fA-F]){12}$ The last requirement here is that they must (if it's possible) be merged into a single expression.

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• NHibernate : restore session connection after session lost

  - by Catalin DICU

  I'm using NHibernate with SQL Server 2005 in a WPF client application. If I stop the SQL Server service and then restart it the session doesn't automatically reconnect. So far I'm doing this witch seems to work : try { using (ITransaction transaction = this.Session.BeginTransaction()) { // some select here } }catch(Exception ex) { if(this.Session.Connection.State == ConnectionState.Closed) { try { this.Session.Connection.Open(); } catch (Exception) { } } } Is there a better way ?

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• Detect user logout / shutdown in Python / GTK under Linux - SIGTERM/HUP not received

  - by Ivo Wetzel

  OK this is presumably a hard one, I've got an pyGTK application that has random crashes due to X Window errors that I can't catch/control. So I created a wrapper that restarts the app as soon as it detects a crash, now comes the problem, when the user logs out or shuts down the system, the app exits with status 1. But on some X errors it does so too. So I tried literally anything to catch the shutdown/logout, with no success, here's what I've tried: import pygtk import gtk import sys class Test(gtk.Window): def delete_event(self, widget, event, data=None): open("delete_event", "wb") def destroy_event(self, widget, data=None): open("destroy_event", "wb") def destroy_event2(self, widget, event, data=None): open("destroy_event2", "wb") def __init__(self): gtk.Window.__init__(self, gtk.WINDOW_TOPLEVEL) self.show() self.connect("delete_event", self.delete_event) self.connect("destroy", self.destroy_event) self.connect("destroy-event", self.destroy_event2) def foo(): open("add_event", "wb") def ex(): open("sys_event", "wb") from signal import * def clean(sig): f = open("sig_event", "wb") f.write(str(sig)) f.close() exit(0) for sig in (SIGABRT, SIGILL, SIGINT, SIGSEGV, SIGTERM): signal(sig, lambda *args: clean(sig)) def at(): open("at_event", "wb") import atexit atexit.register(at) f = Test() sys.exitfunc = ex gtk.quit_add(gtk.main_level(), foo) gtk.main() open("exit_event", "wb") Not one of these succeeds, is there any low level way to detect the system shutdown? Google didn't find anything related to that. I guess there must be a way, am I right? :/ EDIT: OK, more stuff. I've created this shell script: #!/bin/bash trap test_term TERM trap test_hup HUP test_term(){ echo "teeeeeeeeeerm" >~/Desktop/term.info exit 0 } test_hup(){ echo "huuuuuuuuuuup" >~/Desktop/hup.info exit 1 } while [ true ] do echo "idle..." sleep 2 done And also created a .desktop file to run it: [Desktop Entry] Name=Kittens GenericName=Kittens Comment=Kitten Script Exec=kittens StartupNotify=true Terminal=false Encoding=UTF-8 Type=Application Categories=Network;GTK; Name[de_DE]=Kittens Normally this should create the term file on logout and the hup file when it has been started with &. But not on my System. GDM doesn't care about the script at all, when I relog, it's still running. I've also tried using shopt -s huponexit, with no success. EDIT2: Also here's some more information aboute the real code, the whole thing looks like this: Wrapper Script, that catches errors and restarts the programm -> Main Programm with GTK Mainloop -> Background Updater Thread The flow is like this: Start Wrapper -> enter restart loop while restarts < max: -> start program -> check return code -> write error to file or exit the wrapper on 0 Now on shutdown, start program return 1. That means either it did hanup or the parent process terminated, the main problem is to figure out which of these two did just happen. X Errors result in a 1 too. Trapping in the shellscript doesn't work. If you want to take a look at the actual code check it out over at GitHub: http://github.com/BonsaiDen/Atarashii

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• Using ROWLOCK in an INSERT statement (MS SQL)

  - by RPS

  Would it be wise to use ROWLOCK on an insert statement that is copying large amounts of data and inserting it into the same table? Ex) INSERT INTO TABLE with (rowlock) (id, name) select newid, name) from TABLE with (nolock) where id = 1 Does anybody have recommendations on how to improve this statement, as I see when MS SQL gets busy it will end in Timeout Query returned for MS SQL.

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• Delete Nodes + attributes that match Xpath except specific attributes

  - by Ryan Ternier

  I'm trying to find the best (efficient) way of doing this. I have a medium sized XML document. Depending on specific settings certain portions of it need to be filtered out for security reasons. I'll be doing this in XSLT as it's configurable and no code should need changing. I've looked around, but not getting much luck on it. For example: I have the following XPath: //*[@root='2.16.840.1.113883.3.51.1.1.6.1'] Whicrooth gives me all nodes with a root attribute equal to a specific OID. In these nodes I want to have all attributes except for a few (ex. foo and bar) erased, and then having another attribute added (ex. reason) I also need to have multiple XPath expressions that can be ran to zero down on a specific node and clear it's contents out in a similar fashion, with respect to nodes with specific attributes. I'm playing around with information from: XPath expression to select all XML child nodes except a specific list? and XSLT Remove Elements and/or Attributes by Name per XSL Parameters Will update shortly when I can have access what what I"ve done so far. Example: XML Before Transformation <root> <childNode> <innerChild root="2.16.840.1.113883.3.51.1.1.6.1" a="b" b="c" type="innerChildness"/> <innerChildSibling/> </childNode> <animals> <cat> <name>bob</name> </cat> </animals> <tree/> <water root="2.16.840.1.113883.3.51.1.1.6.1" z="zed" l="ell" type="liquidLIke"/> </root> After <root> <childNode> <innerChild root="2.16.840.1.113883.3.51.1.1.6.1" flavor="MSK"/> <!-- filtered --> <innerChildSibling/> </childNode> <animals> <cat flavor="MSK" /> <!-- cat was filtered --> </animals> <tree/> <water root="2.16.840.1.113883.3.51.1.1.6.1" flavor="MSK"/> <!-- filtered --> </root>

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• Cascading dropdownlist jQuery does not retain value on post back.

  - by John Smith

  I have two html select server control on an add data form page. the user selects a value in the first html select server control and then values are populated into the second html select server control with jquery. The problem is when a a user clicks the save button and the page posts back, the values are no longer in the drop down list populated by jQuery. The drop downlist is a html server control, shouldn't it retain the values on post-back? How can I retain the values and save the selected value to the database? $(document).ready(function() { $("#<%=ddlCourseWare.ClientID %>").change(function() { var courseWareId = this.value; try { $.ajax({ type: "POST", url: "Left_SubCategory.aspx/GetTabData", data: "{courseWareId:" + courseWareId + "}", contentType: "application/json; charset=utf-8", dataType: "json", success: function(data) { var result = json_parse(data.d); $("#<%=ddlTabType.ClientID %>")[0].innerHTML = ''; if (result.length > 0) { $.each(result, function(key, item) { $("#<%=ddlTabType.ClientID %>").append($("<option></option>").val(item.id).html(item.TabName)); }); } else { $("#<%=ddlTabType.ClientID %>").append($("<option></option>").val('0').html('--Select--')); } }, error: function(request, status, error) { alert(request.responseText); } }); } catch (ex) { alert(ex); } }); }); HTML <select id="ddlCourseWare" name="ddlCourseWare" runat="server" Width="230px" class="TextBox" Height="18px" > <select id="ddlTabType" name="ddlTabType" runat="server" Width="230px" class="TextBox" Height="18px" onchange="BindMainCat();"> <option>--Select--</option> </select> C# private void BindCourseWare() { ddlCourseWare.DataSource = courseWare.GetCourseWare(); ddlCourseWare.DataTextField = "CourseWareType"; ddlCourseWare.DataValueField = "id"; ddlCourseWare.DataBind(); ddlCourseWare.Items.Insert(0, "----Select Course Ware----"); } [WebMethod] public static string GetTabData(int courseWareId) { var result = new CourseWare().GetCourseTabByCoursewareId(courseWareId); JavaScriptSerializer json_tabs = new JavaScriptSerializer(); string jsonArray_tabs = json_tabs.Serialize(result); return jsonArray_tabs; } protected void btnSave_Click(object sender, EventArgs e) { int mainCategoryID1 = int.Parse(ddlTabType.Value); // not working int mainCategoryID2 = int.Parse(Request["ctl00$ContentPlaceHolder1$ddlTabType"]); // working but always return same value means the upper value (selected index 1) }

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• Sharing transactions between web applications, which run in the same cluster

  - by pihentagy

  We (will) have the following architecture: Base.war will be a self-contained spring-hibernate application All applications will run under Glassfish, and may be clustered E1.war will sit on top of Base.war, extending it's functionality There could be further extensions (E2.war, E3.war, …) sitting on top of Base.war Either wars could start a transaction, and transactions could span between wars Without shutting down Base.war, or any other Ex.war, it should be possible to upgrade an Ey.war Is there a solution for this with spring-hibernate-glassfish environment?

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• jQuery UI Tabs Not Working

  - by Christopher

  I just downloaded jQuery UI Tabs. In the included index.html file, it works fine, CSS and all, with no customization. I copied the files over to my web server, keeping the directory structure intact, and copied the content code to my already-existing index.html, but it does not work. My Header Code <script type="text/javascript" src="js/jquery-1.4.2.min.js"></script> <link type="text/css" href="css/start/jquery-ui-1.8.custom.css" rel="stylesheet" /> <script type="text/javascript" src="js/jquery-ui-1.8.custom.min.js"></script> <script type="text/javascript"> $(function(){ // Tabs $('#tabs').tabs(); }); </script> My Body Code <div id="tabs"> <ul> <li><a href="#tabs-1">First</a></li> <li><a href="#tabs-2">Second</a></li> <li><a href="#tabs-3">Third</a></li> </ul> <div id="tabs-1">Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.</div> <div id="tabs-2">Phasellus mattis tincidunt nibh. Cras orci urna, blandit id, pretium vel, aliquet ornare, felis. Maecenas scelerisque sem non nisl. Fusce sed lorem in enim dictum bibendum.</div> <div id="tabs-3">Nam dui erat, auctor a, dignissim quis, sollicitudin eu, felis. Pellentesque nisi urna, interdum eget, sagittis et, consequat vestibulum, lacus. Mauris porttitor ullamcorper augue.</div> </div> My Output * First * Second * Third Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Phasellus mattis tincidunt nibh. Cras orci urna, blandit id, pretium vel, aliquet ornare, felis. Maecenas scelerisque sem non nisl. Fusce sed lorem in enim dictum bibendum. Nam dui erat, auctor a, dignissim quis, sollicitudin eu, felis. Pellentesque nisi urna, interdum eget, sagittis et, consequat vestibulum, lacus. Mauris porttitor ullamcorper augue. All of the files are referenced correctly, and it is all copied and pasted directly from a fully functional file., but it will not work.

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• Tab Controls effecting other Controls.

  - by VBeginner

  Hopefully I've explained myself good enough this time. Can't seem to get a real answer. Trying to make it so when I select certain tabs, certain controls on the left will disappear or reappear. http://img43.imageshack.us/img43/7533/scrnshotg.jpg Also, when "Stats" is selected, I need it to auto-select "Frequency" Ex. On click/focus/select (whatever, nothing seems to work)... ComboBox.Visible = True Thank you.

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• NSArray: add multiple objects with same value

  - by Matt S.

  How can I add multiple objects to my NSArray? Each object will have the same value. Ex. I want the value "SO" added to my array 10 times

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• How can I reliably check client identity whilst making DCOM calls to a C# .Net 3.5 Server?

  - by pionium

  Hi, I have an old Win32 C++ DCOM Server that I am rewriting to use C# .Net 3.5. The client applications sit on remote XP machines and are also written in C++. These clients must remain unchanged, hence I must implement the interfaces on new .Net objects. This has been done, and is working successfully regarding the implementation of the interfaces, and all of the calls are correctly being made from the old clients to the new .Net objects. However, I'm having problems obtaining the identity of the calling user from the DCOM Client. In order to try to identify the user who instigated the DCOM call, I have the following code on the server... [DllImport("ole32.dll")] static extern int CoImpersonateClient(); [DllImport("ole32.dll")] static extern int CoRevertToSelf(); private string CallingUser { get { string sCallingUser = null; if (CoImpersonateClient() == 0) { WindowsPrincipal wp = System.Threading.Thread.CurrentPrincipal as WindowsPrincipal; if (wp != null) { WindowsIdentity wi = wp.Identity as WindowsIdentity; if (wi != null && !string.IsNullOrEmpty(wi.Name)) sCallingUser = wi.Name; } if (CoRevertToSelf() != 0) ReportWin32Error("CoRevertToSelf"); } else ReportWin32Error("CoImpersonateClient"); return sCallingUser; } } private static void ReportWin32Error(string sFailingCall) { Win32Exception ex = new Win32Exception(); Logger.Write("Call to " + sFailingCall + " FAILED: " + ex.Message); } When I get the CallingUser property, the value returned the first few times is correct and the correct user name is identified, however, after 3 or 4 different users have successfully made calls (and it varies, so I can't be more specific), further users seem to be identified as users who had made earlier calls. What I have noticed is that the first few users have their DCOM calls handled on their own thread (ie all calls from a particular client are handled by a single unique thread), and then subsequent users are being handled by the same threads as the earlier users, and after the call to CoImpersonateClient(), the CurrentPrincipal matches that of the initial user of that thread. To Illustrate: User Tom makes DCOM calls which are handled by thread 1 (CurrentPrincipal correctly identifies Tom) User Dick makes DCOM calls which are handled by thread 2 (CurrentPrincipal correctly identifies Dick) User Harry makes DCOM calls which are handled by thread 3 (CurrentPrincipal correctly identifies Harry) User Bob makes DCOM calls which are handled by thread 3 (CurrentPrincipal incorrectly identifies him as Harry) As you can see in this illustration, calls from clients Harry and Bob are being handled on thread 3, and the server is identifying the calling client as Harry. Is there something that I am doing wrong? Are there any caveats or restrictions on using Impersonations in this way? Is there a better or different way that I can RELIABLY achieve what I am trying to do? All help would be greatly appreciated. Regards Andrew

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