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• android: tesseract force close

  - by Vishnu Mohan G

  I tried the tesseract tutorial here and get the following error: 06-03 01:18:52.626: E/AndroidRuntime(15103): FATAL EXCEPTION: main 06-03 01:18:52.626: E/AndroidRuntime(15103): java.lang.ExceptionInInitializerError 06-03 01:18:52.626: E/AndroidRuntime(15103): at o.c.r.LetsTryOCrActivity.onCreate(LetsTryOCrActivity.java:28) 06-03 01:18:52.626: E/AndroidRuntime(15103): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 06-03 01:18:52.626: E/AndroidRuntime(15103): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1722) 06-03 01:18:52.626: E/AndroidRuntime(15103): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1784) 06-03 01:18:52.626: E/AndroidRuntime(15103): at android.app.ActivityThread.access$1500(ActivityThread.java:123) 06-03 01:18:52.626: E/AndroidRuntime(15103): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939) 06-03 01:18:52.626: E/AndroidRuntime(15103): at android.os.Handler.dispatchMessage(Handler.java:99) 06-03 01:18:52.626: E/AndroidRuntime(15103): at android.os.Looper.loop(Looper.java:130) 06-03 01:18:52.626: E/AndroidRuntime(15103): at android.app.ActivityThread.main(ActivityThread.java:3835) 06-03 01:18:52.626: E/AndroidRuntime(15103): at java.lang.reflect.Method.invokeNative(Native Method) 06-03 01:18:52.626: E/AndroidRuntime(15103): at java.lang.reflect.Method.invoke(Method.java:507) 06-03 01:18:52.626: E/AndroidRuntime(15103): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:847) 06-03 01:18:52.626: E/AndroidRuntime(15103): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:605) 06-03 01:18:52.626: E/AndroidRuntime(15103): at dalvik.system.NativeStart.main(Native Method) 06-03 01:18:52.626: E/AndroidRuntime(15103): Caused by: java.lang.UnsatisfiedLinkError: Couldn't load lept: findLibrary returned null 06-03 01:18:52.626: E/AndroidRuntime(15103): at java.lang.Runtime.loadLibrary(Runtime.java:429) 06-03 01:18:52.626: E/AndroidRuntime(15103): at java.lang.System.loadLibrary(System.java:554) 06-03 01:18:52.626: E/AndroidRuntime(15103): at com.googlecode.tesseract.android.TessBaseAPI.(TessBaseAPI.java:42) 06-03 01:18:52.626: E/AndroidRuntime(15103): ... 14 more Please help me solve this. thanks in Advance!.

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• Cucumber Error: Socket Error for Test Environment Host in REST API

  - by tmo256

  I posted this to the Cucumber group with no replies, which makes me wonder if this is actually a cucumber issue or not. I'm pretty new to cucumber, and there are a number of things I really don't quite understand about how the cucumber environment is set up and executed within the test environment. I have a REST API rails app I'm testing with cucumber, using the RestClient gem to generate a post to controller create action. When I run the feature with a hard-coded URL pointing to a running localhost server (my local dev server environment; replacing tickets_url with "http:// localhost/tickets" in the snippet below), my cucumber steps execute as expected. However, when the resource URL resolves to the cucumber host I'm declaring, I get a socket error exception. getaddrinfo: nodename nor servname provided, or not known (SocketError) From the steps file: When /^POS Adapter sends JSON data to the Tickets resource$/ do ticket = { :ticket = { ... } } host! "test.host" puts tickets_url RestClient.post tickets_url, ticket.to_json, :content_type = :json, :accepts = :json end (the "puts" statement prints "http://test.host/tickets") Using the following gems: cucumber-0.6.1 webrat-0.6.0 rest-client-1.2.0 I should also say I have a similar set up in another rails app, using test.host as my host, and it seems to work fine. I'd appreciate any insight on what I might be missing in my configuration or what this could be related to.

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• C# Taking a element off each time (stack)

  - by Sef

  Greetings, Have a question considering a program that stimulates a stack.(not using any build in stack features or any such) stack2= 1 2 3 4 5 //single dimension array of 5 elements By calling up a method "pop" the stack should look like the following: Basically taking a element off each time the stack is being "called" up again. stack2= 1 2 3 4 0 stack2= 1 2 3 0 0 stack2= 1 2 0 0 0 stack2= 1 0 0 0 0 stack2= 0 0 0 0 0 - for (int i = 1; i <= 6; i++) { number= TryPop(s2); //use number ShowStack(s2, "s2"); } Basically I already have code that fills my array with values (trough a push method). The pop method should basically take the last value and place it on 0. Then calls up the next stack and place the following on 0 (like shown above in stack2). The current pop method that keeps track of the top index (0 elements = 0 top, 1 element = 1 top etc..). Already includes a underflow warning if this goes on 0 or below (which is correct). public int Pop() { if(top <= 0) { throw new Exception("Stack underflow..."); } else { for (int j = tabel.Length - 1; j >= 0; j--) { //...Really not sure what to do here. } } return number; }/*Pop*/ Since in the other class I already have a loop (for loop shown above) that simulates 6 times the s2 stack. (first stack: 1 2 3 4 0, second stack 1 2 3 0 0 and so on.) How exactly do I take a element off each time? Either I have the entire display on 0 or the 0 in the wrong places / out of index errors. Thanks in advance!

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• [ASP.NET] Difficulties using custom control - RichTextEditor

  - by Chris

  I am working on a school project that uses ASP.NET. I found this TextEditor control ( http://blogs.msdn.com/kirti/archive/2007/11/10/rich-text-editor-is-here.aspx ) that I am trying to include but it isn't working. The error I am getting is: Error Rendering Control - TextEditor. An unhandled exception has occurred. Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index. I see this error when I go Design part of the editor. I just don't understand this error at all. Also I am a lil bit confused as there is no parameter called index. :( What I have done is reference the binary in my project and then on the page I am trying to use it have registered its namespace and assembly with this line: <%@ Register Assembly="RichTextEditor" Namespace="AjaxControls" TagPrefix="rtt" %> I then go ahead and try to add the control to the page with this line of code: <rtt:richtexteditor ID="TextEditor" Theme="Blue" runat="server" /> Any help would be much appreciated. I haven't done anything like add a custom control before.

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• VB.net Saving an MetaFile / EMF as a bitmap ( .tiff)

  - by pehaada

  Currently I have a third party control that generates a Metafile. I can save the .wmf file to disk with out issue. The problem is how do I render the Metafile as a Tiff file. Currently I have the following code to get my metafile and save it. Dim mf As Metafile = page.GetImage(TXTextControl.Page.PageContent.All) Dim enhMetafileHandle As IntPtr = mf.GetHenhmetafile() Dim h As IntPtr Dim bufferSize As UInteger = GetEnhMetaFileBits(enhMetafileHandle, 0, h) Dim buffer(CInt(bufferSize)) As Byte GetEnhMetaFileBits(enhMetafileHandle, bufferSize, buffer) Dim msMetafileStream As New MemoryStream msMetafileStream.Write(buffer, 0, CInt(bufferSize)) Dim baMetafileData() As Byte baMetafileData = msMetafileStream.ToArray Dim g As Graphics = Graphics.FromImage(mf) mf.Dispose() File.WriteAllBytes("c:\a.wmf", baMetafileData) end sub _ Public Shared Function GetEnhMetaFileBits( ByVal hEMF As System.IntPtr, ByVal nSize As UInteger, ByVal lpData As IntPtr) As UInteger End Function <System.Runtime.InteropServices.DllImportAttribute("gdi32.dll", EntryPoint:="GetEnhMetaFileBits")> _ Public Shared Function GetEnhMetaFileBits(<System.Runtime.InteropServices.InAttribute()> ByVal hEMF As System.IntPtr, ByVal nSize As UInteger, ByVal lpData() As Byte) As UInteger End Function I've tried all sort of IMAGE and Graphic calls and just can't save the meta file as a .tiff. Any suggestions would be great. I even tried to create a new bitmap and draw the metafile onto it. I always end up with a GDI exception being thrown.

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• Why Look and feel is not getting updated properly?

  - by swift

  I’m developing a swing application in which I have an option to change the Look and feel of the application on click of a button. Now my problem is when I click the button to change the theme it’s not properly updating the L&F of my app, say my previous theme is “noire” and I choose “MCWin” after it, but the style of the noire theme is still there Here is sample working code: package whiteboard; import java.awt.GridBagLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.ComponentEvent; import java.awt.event.ComponentListener; import javax.swing.JFrame; import javax.swing.JLayeredPane; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; import javax.swing.SwingUtilities; import javax.swing.UIManager; import javax.swing.WindowConstants; public class DiscussionBoard extends JFrame implements ComponentListener,ActionListener { // Variables declaration private JMenuItem audioMenuItem; private JMenuItem boardMenuItem; private JMenuItem exitMenuItem; private JMenuItem clientsMenuItem; private JMenuItem acryl; private JMenuItem hifi; private JMenuItem aero; private JMenuItem aluminium; private JMenuItem bernstein; private JMenuItem fast; private JMenuItem graphite; private JMenuItem luna; private JMenuItem mcwin; private JMenuItem noire; private JMenuItem smart; private JMenuBar boardMenuBar; private JMenuItem messengerMenuItem; private JMenu openMenu; private JMenu saveMenu; private JMenu themesMenu; private JMenuItem saveMessengerMenuItem; private JMenuItem saveWhiteboardMenuItem; private JMenu userMenu; JLayeredPane layerpane; /** Creates new form discussionBoard * @param connection */ public DiscussionBoard() { initComponents(); setLocationRelativeTo(null); addComponentListener(this); } private void initComponents() { boardMenuBar = new JMenuBar(); openMenu = new JMenu(); themesMenu = new JMenu(); messengerMenuItem = new JMenuItem(); boardMenuItem = new JMenuItem(); audioMenuItem = new JMenuItem(); saveMenu = new JMenu(); saveMessengerMenuItem = new JMenuItem(); saveWhiteboardMenuItem = new JMenuItem(); userMenu = new JMenu(); clientsMenuItem = new JMenuItem(); exitMenuItem = new JMenuItem(); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); setLayout(new GridBagLayout()); setResizable(false); setTitle("Discussion Board"); openMenu.setText("Open"); saveMenu.setText("Save"); themesMenu.setText("Themes"); acryl = new JMenuItem("Acryl"); hifi = new JMenuItem("HiFi"); aero = new JMenuItem("Aero"); aluminium = new JMenuItem("Aluminium"); bernstein = new JMenuItem("Bernstein"); fast = new JMenuItem("Fast"); graphite = new JMenuItem("Graphite"); luna = new JMenuItem("Luna"); mcwin = new JMenuItem("MCwin"); noire = new JMenuItem("Noire"); smart = new JMenuItem("Smart"); hifi.addActionListener(this); acryl.addActionListener(this); aero.addActionListener(this); aluminium.addActionListener(this); bernstein.addActionListener(this); fast.addActionListener(this); graphite.addActionListener(this); luna.addActionListener(this); mcwin.addActionListener(this); noire.addActionListener(this); smart.addActionListener(this); messengerMenuItem.setText("Messenger"); openMenu.add(messengerMenuItem); openMenu.add(boardMenuItem); audioMenuItem.setText("Audio Messenger"); openMenu.add(audioMenuItem); exitMenuItem.setText("Exit"); exitMenuItem.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { exitMenuItemActionPerformed(evt); } }); openMenu.add(exitMenuItem); boardMenuBar.add(openMenu); saveMessengerMenuItem.setText("Messenger"); saveMenu.add(saveMessengerMenuItem); saveWhiteboardMenuItem.setText("Whiteboard"); saveMenu.add(saveWhiteboardMenuItem); boardMenuBar.add(saveMenu); userMenu.setText("Users"); clientsMenuItem.setText("Current Session"); userMenu.add(clientsMenuItem); themesMenu.add(acryl); themesMenu.add(hifi); themesMenu.add(aero); themesMenu.add(aluminium); themesMenu.add(bernstein); themesMenu.add(fast); themesMenu.add(graphite); themesMenu.add(luna); themesMenu.add(mcwin); themesMenu.add(noire); themesMenu.add(smart); boardMenuBar.add(userMenu); boardMenuBar.add(themesMenu); saveMessengerMenuItem.setEnabled(false); saveWhiteboardMenuItem.setEnabled(false); setJMenuBar(boardMenuBar); setSize(1024, 740); setVisible(true); } protected void exitMenuItemActionPerformed(ActionEvent evt) { System.exit(0); } @Override public void componentHidden(ComponentEvent arg0) { } @Override public void componentMoved(ComponentEvent e) { } @Override public void componentResized(ComponentEvent arg0) { } @Override public void componentShown(ComponentEvent arg0) { } @Override public void actionPerformed(ActionEvent e) { try { if(e.getSource()==hifi) { UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel"); SwingUtilities.updateComponentTreeUI(getRootPane()); UIManager.setLookAndFeel("com.jtattoo.plaf.hifi.HiFiLookAndFeel"); enableTheme(); hifi.setEnabled(false); } else if(e.getSource()==acryl) { UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel"); SwingUtilities.updateComponentTreeUI(getRootPane()); UIManager.setLookAndFeel("com.jtattoo.plaf.acryl.AcrylLookAndFeel"); enableTheme(); acryl.setEnabled(false); } else if(e.getSource()==aero) { UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel"); SwingUtilities.updateComponentTreeUI(getRootPane()); UIManager.setLookAndFeel("com.jtattoo.plaf.aero.AeroLookAndFeel"); enableTheme(); aero.setEnabled(false); } else if(e.getSource()==aluminium) { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); SwingUtilities.updateComponentTreeUI(getRootPane()); UIManager.setLookAndFeel("com.jtattoo.plaf.aluminium.AluminiumLookAndFeel"); enableTheme(); aluminium.setEnabled(false); } else if(e.getSource()==bernstein) { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); SwingUtilities.updateComponentTreeUI(getRootPane()); UIManager.setLookAndFeel("com.jtattoo.plaf.bernstein.BernsteinLookAndFeel"); enableTheme(); bernstein.setEnabled(false); } else if(e.getSource()==fast) { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); SwingUtilities.updateComponentTreeUI(getRootPane()); UIManager.setLookAndFeel("com.jtattoo.plaf.fast.FastLookAndFeel"); enableTheme(); fast.setEnabled(false); } else if(e.getSource()==graphite) { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); SwingUtilities.updateComponentTreeUI(getRootPane()); UIManager.setLookAndFeel("com.jtattoo.plaf.graphite.GraphiteLookAndFeel"); enableTheme(); graphite.setEnabled(false); } else if(e.getSource()==luna) { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); SwingUtilities.updateComponentTreeUI(getRootPane()); UIManager.setLookAndFeel("com.jtattoo.plaf.luna.LunaLookAndFeel"); enableTheme(); luna.setEnabled(false); } else if(e.getSource()==mcwin) { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); SwingUtilities.updateComponentTreeUI(getRootPane()); UIManager.setLookAndFeel("com.jtattoo.plaf.mcwin.McWinLookAndFeel"); enableTheme(); mcwin.setEnabled(false); } else if(e.getSource()==noire) { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); SwingUtilities.updateComponentTreeUI(getRootPane()); UIManager.setLookAndFeel("com.jtattoo.plaf.noire.NoireLookAndFeel"); enableTheme(); noire.setEnabled(false); } else if(e.getSource()==smart) { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); SwingUtilities.updateComponentTreeUI(getRootPane()); UIManager.setLookAndFeel("com.jtattoo.plaf.smart.SmartLookAndFeel"); enableTheme(); smart.setEnabled(false); } SwingUtilities.updateComponentTreeUI(getRootPane()); } catch (Exception ex) { ex.printStackTrace(); } } private void enableTheme() { acryl.setEnabled(true); hifi.setEnabled(true); aero.setEnabled(true); aluminium.setEnabled(true); bernstein.setEnabled(true); fast.setEnabled(true); graphite.setEnabled(true); luna.setEnabled(true); mcwin.setEnabled(true); noire.setEnabled(true); smart.setEnabled(true); } public static void main(String []ar) { try { UIManager.setLookAndFeel("com.jtattoo.plaf.acryl.AcrylLookAndFeel"); } catch (Exception e) { e.printStackTrace(); } new DiscussionBoard(); } } What’s the problem here? why its not getting updated? There is a demo application here which is exactly doing what i want but i cant get a clear idea of it.

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• Java: Cleaning up what causes a connection reset

  - by Zombies

  There seems to be some confusion as well contradicting statements on various SO answers: http://stackoverflow.com/questions/585599/whats-causing-my-java-net-socketexception-connection-reset . You can see here that the accepted answer states that the connection was closed by other side. But this is not true, closing a connection doesn't cause a connection reset. It is cauesed by "an underlying TCP/IP error." What I want to know is if a SocketException: Connection reset means really besides "unerlying TCP/IP Error." What really causes this? As I doubt it has anything to do with the connection being closed (since closing a connection isn't an exception worthy flag, and reading from a closed connection is, but that isn't an "underlying TCP/IP error." My hypothesis is this Connection reset is caused from a server's failure to acknowledge an ACK packet (either wholly or just improperly as per TCP/IP). And that a SocketTimeoutException is generated only when no data is generated to be read (since this is thrown during a read after a certain duration, and read is waiting for data, but is not concerned with ACK packets). In other words, read() throws SocketTimeoutException if it didn't read any bytes of actual data (DATA LAYER) in its allotted time.

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• Run time error: what's wrong?

  - by javacode

  I am getting run time error import javax.mail.*; import javax.mail.internet.*; import java.util.*; public class SendMail { public static void main(String [] args)throws MessagingException { SendMail sm=new SendMail(); sm.postMail(new String[]{"[email protected]"},"hi","hello","[email protected]"); } public void postMail( String recipients[ ], String subject, String message , String from) throws MessagingException { boolean debug = false; //Set the host smtp address Properties props = new Properties(); props.put("mail.smtp.host", "webmail.emailmyname.com"); // create some properties and get the default Session Session session = Session.getDefaultInstance(props, null); session.setDebug(debug); // create a message Message msg = new MimeMessage(session); // set the from and to address InternetAddress addressFrom = new InternetAddress(from); msg.setFrom(addressFrom); InternetAddress[] addressTo = new InternetAddress[recipients.length]; for (int i = 0; i < recipients.length; i++) { addressTo[i] = new InternetAddress(recipients[i]); } msg.setRecipients(Message.RecipientType.TO, addressTo); // Optional : You can also set your custom headers in the Email if you Want msg.addHeader("MyHeaderName", "myHeaderValue"); // Setting the Subject and Content Type msg.setSubject(subject); msg.setContent(message, "text/plain"); Transport.send(msg); } } Error Exception in thread "main" java.lang.NoClassDefFoundError: SendMail Caused by: java.lang.ClassNotFoundException: SendMail at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) Could not find the main class: SendMail. Program will exit.

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• Error building Visual Studio 2010 Silverlight 4 projects on Windows 7 with XP Mode

  - by Kevin Dente

  I installed Visual Studio 2010 Beta 2 in an XP Mode VM on Windows 7. Then I created a trivial Silverlight 4 (beta) project and tried to build it. I get the following error: Error 1 The "ValidateXaml" task failed unexpectedly. System.IO.FileLoadException: Could not load file or assembly 'file://\tsclient\d\Users\me\Documents\Visual Studio 2010\Projects\SilverlightApplication2\SilverlightApplication2\obj\Debug\SilverlightApplication2.dll' or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515) File name: 'file://\tsclient\d\Users\me\Documents\Visual Studio 2010\Projects\SilverlightApplication2\SilverlightApplication2\obj\Debug\SilverlightApplication2.dll' --- System.NotSupportedException: An attempt was made to load an assembly from a network location which would have caused the assembly to be sandboxed in previous versions of the .NET Framework. This release of the .NET Framework does not enable CAS policy by default, so this load may be dangerous. If this load is not intended to sandbox the assembly, please enable the loadFromRemoteSources switch. See http://go.microsoft.com/fwlink/?LinkId=155569 for more information. at System.Reflection.RuntimeAssembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, RuntimeAssembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoadAssemblyName(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection, Boolean suppressSecurityChecks) at System.Reflection.RuntimeAssembly.InternalLoadFrom(String assemblyFile, Evidence securityEvidence, Byte[] hashValue, AssemblyHashAlgorithm hashAlgorithm, Boolean forIntrospection, Boolean suppressSecurityChecks, StackCrawlMark& stackMark) at System.Reflection.Assembly.LoadFrom(String assemblyFile) at Microsoft.Silverlight.Build.Tasks.ValidateXaml.XamlValidator.Execute(ITask task) at Microsoft.Silverlight.Build.Tasks.ValidateXaml.XamlValidator.Execute(ITask task) at Microsoft.Silverlight.Build.Tasks.ValidateXaml.Execute() at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask, Boolean& taskResult) I believe this is related to the fact that XP Mode redirects the My Documents folder to the host, turning it into a network share location, and some sort of CAS / security policy is being triggered. Anyone know how to fix it?

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• Eclipse Error: java.net.SocketException: Broken pipe How to Solve ?

  - by Vaibhav Bhalke

  Hello Everybody I am using GWT2.0.1,when I am running web application then I get following error message on Console. after removing error from error log still same message occur as well as restarting eclipse_galileo.To solve this problem i want to restart machine. Each time this message comes on console,then i need to restart m/c I there any way to solve this problem ? please provide best solution? ASAP. Exception in thread "Code server for Dealelephant from Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.17) Gecko/2010010604 Ubuntu/9.04 (jaunty) Firefox/3.0.17 on http://127.0.0.1:8888/Dealelephant.html?gwt.codesvr=127.0.0.1:9997 @ Ci%#*k,XE'=JH,|~" com.google.gwt.dev.shell.BrowserChannel$RemoteDeathError: Remote connection lost at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:391) at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:222) at java.lang.Thread.run(Thread.java:619) Caused by: java.net.SocketException: Broken pipe at java.net.SocketOutputStream.socketWrite0(Native Method) at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92) at java.net.SocketOutputStream.write(SocketOutputStream.java:136) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123) at java.io.DataOutputStream.flush(DataOutputStream.java:106) at com.google.gwt.dev.shell.BrowserChannel$ReturnMessage.send(BrowserChannel.java:1341) at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:388) ... 2 more Hope for Best co-operation Thank you in advance

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• Rest WebService error handling.

  - by Pratik

  Hi there, I am using RestWebservice for few basic operations , like creating/searching. The request xml looks something like this <customer> <name/> ..... </customer> For a successful operation I return the same customer XML with extra fields populated in it(eg. systemId etc which we blank in the request) . with Response.Status=2000 For an unsuccessful operation i return something like this with different error codes . e.g Response.Status = 422(Unprocessable entity) Response.Status= 500(Internal Server Error) and few others.. <errors> <error> An exception occurred while creating the customer</error> <error> blah argument is not valid.</error> </errors> Now i am not sure , whether this is the correct way of sending the errors to the client. Maybe it should be present in the header of the response. I will really appreciate any help. Thanks!

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• Maximum page fetch with maximum bandwith

  - by Ehsan

  Hi I want to create an application like a spider I've implement fetching page as the following code in multi-thread application but there is two problem 1) I want to use my maximum bandwidth to send/receive request, how should I config my request to do so (Like Download Accelerator application and the like) cause I heard the normal application will use 66% of the available bandwidth. 2) I don't know what exactly HttpWebRequest.KeepAlive do, but as its name implies I think i can create a connection to a website and without closing the connection sending another request to that web site using existing connection. does it boost performance or Im wrong ?? public PageFetchResult Fetch() { PageFetchResult fetchResult = new PageFetchResult(); try { HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(URLAddress); HttpWebResponse resp = (HttpWebResponse)req.GetResponse(); Uri requestedURI = new Uri(URLAddress); Uri responseURI = resp.ResponseUri; string resultHTML = ""; byte[] reqHTML = ResponseAsBytes(resp); if (!string.IsNullOrEmpty(FetchingEncoding)) resultHTML = Encoding.GetEncoding(FetchingEncoding).GetString(reqHTML); else if (!string.IsNullOrEmpty(resp.CharacterSet)) resultHTML = Encoding.GetEncoding(resp.CharacterSet).GetString(reqHTML); req.Abort(); resp.Close(); fetchResult.IsOK = true; fetchResult.ResultHTML = resultHTML; } catch (Exception ex) { fetchResult.IsOK = false; fetchResult.ErrorMessage = ex.Message; } return fetchResult; }

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• WCF Callback Faulted - what happens to the session?

  - by RemotecUk

  Just trying to get my head around what can happen when things go wrong with WCF. I have an implementation of my service contract declared with an InstanceContextMode of PerSession... [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerSession, ConcurrencyMode = ConcurrencyMode.Multiple)] The calls happen as follows: My client calls the server and calls GetServerUTC() to return the current UTC time of the server. This is a one way call and the server will call the client back when its ready (trivial in this instance to simply return the current time!) The server calls back to the client and for test purposes in the callback implementation on the client I throw an exception. This goes unhandled in the client (for test purposes) and the client crashes and closes down. On the server I handle the faulted event handler on the ICommunicationObject... obj.Faulted += new EventHandler(EventService_Faulted); Questions... Will this kill off the session for the current connection on the server. I presume I am free to do what I want in this method e.g. logging or something, but should I do anything specific here to terminate the session or will WCF handle this? From a best practise view point what should I do when the callback is faulted? Does it mean "something has happened in your client" and thats the end of that or is there something I a missing here? Additionally, are there any other faulted handlers I should be handling. Ive done a lot of reading on WCF and it seems sort of vague on what to do when something goes wrong. At present I am implementing a State Machine on my client which will manage the connection and determine if a user action can happen dependant on if a connection exists to the server - or is this overkill. Any tips would be really appreciated ;)

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• Java Swing NullPointerException when drawing

  - by juFo

  I'm using a custom JLayeredPane. I have several Shapes which needed to be drawn on different layers in the JLayeredPane. To test this I create a JPanel and ask its graphics. Then I draw a test rectangle on that JPanel (preparing the graphics) and in my paintComponent method from the JLayeredPane I finally draw everything. But this fails (NullPointerException). public class MyCustomPanel extends JLayeredPane { // test JPanel testpane; Graphics g2; // test // constructor public MyCustomPanel() { testpane = new JPanel(); this.add(testpane, new Integer(14)); g2 = testpane.getGraphics(); } @Override public void paintComponent(Graphics g) { super.paintComponent(g); g2.drawRect(10, 10, 300, 300); } } // run: //Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException // at view.MyCustomPanel.paintComponent(MyCustomPanel.java:65) Why can't I draw on such a JPanel from within my JLayeredPane? I can draw directly on my JLayeredPane from within my paintComponent method but that's on the default Panel from the JLayeredPane. I need to create and draw on several layers which are added in my JLayeredPane. What am I doing wrong? :s

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• Lightweight spinlocks built from GCC atomic operations?

  - by Thomas

  I'd like to minimize synchronization and write lock-free code when possible in a project of mine. When absolutely necessary I'd love to substitute light-weight spinlocks built from atomic operations for pthread and win32 mutex locks. My understanding is that these are system calls underneath and could cause a context switch (which may be unnecessary for very quick critical sections where simply spinning a few times would be preferable). The atomic operations I'm referring to are well documented here: http://gcc.gnu.org/onlinedocs/gcc-4.4.1/gcc/Atomic-Builtins.html Here is an example to illustrate what I'm talking about. Imagine a RB-tree with multiple readers and writers possible. RBTree::exists() is read-only and thread safe, RBTree::insert() would require exclusive access by a single writer (and no readers) to be safe. Some code: class IntSetTest { private: unsigned short lock; RBTree<int>* myset; public: // ... void add_number(int n) { // Aquire once locked==false (atomic) while (__sync_bool_compare_and_swap(&lock, 0, 0xffff) == false); // Perform a thread-unsafe operation on the set myset->insert(n); // Unlock (atomic) __sync_bool_compare_and_swap(&lock, 0xffff, 0); } bool check_number(int n) { // Increment once the lock is below 0xffff u16 savedlock = lock; while (savedlock == 0xffff || __sync_bool_compare_and_swap(&lock, savedlock, savedlock+1) == false) savedlock = lock; // Perform read-only operation bool exists = tree->exists(n); // Decrement savedlock = lock; while (__sync_bool_compare_and_swap(&lock, savedlock, savedlock-1) == false) savedlock = lock; return exists; } }; (lets assume it need not be exception-safe) Is this code indeed thread-safe? Are there any pros/cons to this idea? Any advice? Is the use of spinlocks like this a bad idea if the threads are not truly concurrent? Thanks in advance. ;)

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• Create an SQL Express 2008 database in C# code, but login fails when trying to connect with a sysadm

  - by Andrés Gonzales

  I have a piece of code that creates an SQL Server Express 2008 in runtime, and then tries to connect to it to execute a database initialization script in Transact-SQL. The code that creates the database is the following: private void CreateDatabase() { using (var connection = new SqlConnection( "Data Source=.\\sqlexpress;Initial Catalog=master;" + "Integrated Security=true;User Instance=True;")) { connection.Open(); using (var command = connection.CreateCommand()) { command.CommandText = "CREATE DATABASE " + m_databaseFilename + " ON PRIMARY (NAME=" + m_databaseFilename + ", FILENAME='" + this.m_basePath + m_databaseFilename + ".mdf')"; command.ExecuteNonQuery(); } } } The database is created successfully. After that, I try to connect to the database to run the initialization script, by using the following code: private void ExecuteQueryFromFile(string filename) { string queryContent = File.ReadAllText(m_filePath + filename); this.m_connectionString = string.Format( @"Server=.\SQLExpress; Integrated Security=true;Initial Catalog={0};", m_databaseFilename); using (var connection = new SqlConnection(m_connectionString)) { connection.Open(); using (var command = connection.CreateCommand()) { command.CommandText = queryContent; command.CommandTimeout = 0; command.ExecuteNonQuery(); } } } However, the connection.Open() statement fails, throwing the following exception: Cannot open database "TestData" requested by the login. The login failed. Login failed for user 'MYDOMAIN\myusername'. I am completely puzzled by this error because the account I am trying to connect with has sysadmin privileges, which should allow me to connect any database (notice that I use a connection to the master database to create the database in the first place).

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• Calling a wsdl in php over https using Zend Soap Client

  - by Sam Segers

  When I'm trying to connect to a webservice I always get the next fault SoapFault exception: [s:Sender] An error occurred when verifying security for the message I have to use a security header like: <o:Security env:mustUnderstand="1" xmlns:o="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd"> <wsu:Timestamp env:mustUnderstand="1" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"> <wsu:Created>2010-06-10T08:22:59Z</wsu:Created> <wsu:Expires>2010-06-12T10:22:59Z</wsu:Expires> </wsu:Timestamp> <o:UsernameToken> <o:Username>myUsername</o:Username> <o:Password>myPassword</o:Password> </o:UsernameToken> </o:Security> My username and password are correct, I have allready tried to change the expiration date later but that doesn't solve it. What else could be the reason for this fault?

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• asp.net MVC HandleError

  - by boris callens

  How do I go about the [HandleError] filter in asp.net MVC Preview 5? I set the customErrors in my web.config file <customErrors mode="On" defaultRedirect="Error.aspx"> <error statusCode="403" redirect="NoAccess.htm"/> <error statusCode="404" redirect="FileNotFound.htm"/> </customErrors> and put [HandleError] above my Controller Class like this: [HandleError] public class DSWebsiteController: Controller{ [snip] public ActionResult CrashTest() { throw new Exception("Oh Noes!"); } } Then I let my controllers inherit from this class and call CrashTest() on them. Visual studio halts at the error and after pressing f5 to continue, I get rerouted to Error.aspx?aspxerrorpath=/sxi.mvc/CrashTest (where sxi is the name of the used controller. Off course the path cannot be found and I get "Server Error in '/' Application." 404. This site was ported from preview 3 to 5. Everything runs (wasn't that much work to port) except the error handling. When I create a complete new project the error handling seems to work. Ideas? --Note-- Since this question has over 3K views now, I thought it would be beneficial to put in what I'm currently (asp.net mvc 1.0) using. In the mvc contrib project there is a brilliant attribute called "RescueAttribute" You should probably check it out too ;)

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• How to read a database record with a DataReader and add it to a DataTable

  - by Olga

  Hello I have some data in a Oracle database table(around 4 million records) which i want to transform and store in a MSSQL database using ADO.NET. So far i used (for much smaller tables) a DataAdapter to read the data out of the Oracle DataBase and add the DataTable to a DataSet for further processing. When i tried this with my huge table, there was a outofmemory exception thrown. ( I assume this is because i cannot load the whole table into my memory) :) Now i am looking for a good way to perform this extract/transfer/load, without storing the whole table in the memory. I would like to use a DataReader and read the single dataRecords in a DataTable. If there are about 100k rows in it, I would like to process them and clear the DataTable afterwards(to have free memory again). Now i would like to know how to add a single datarecord as a row to a dataTable with ado.net and how to completly clear the dataTable out of memory: My code so far: Dim dt As New DataTable Dim count As Int32 count = 0 ' reads data records from oracle database table' While rdr.Read() 'read n records and add them to a dataTable' While count < 10000 dt.Rows.Add(????) count = count + 1 End While 'transform data in the dataTable, and insert it to the destination' ' flush the dataTable after insertion' count = 0 End While Thank you very much for your response!

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• Memory leak of java.lang.ref.WeakReference objects inside JDK classes

  - by mandye

  The following simple code reproduces the growth of java.lang.ref.WeakReference objects in the heap: public static void main(String[] args) throws Exception { while (true) { java.util.logging.Logger.getAnonymousLogger(); Thread.sleep(1); } } Here is the output of jmap command within a few seconds interval: user@t1007:~ jmap -d64 -histo:live 29201|grep WeakReference 8: 22493 1079664 java.lang.ref.WeakReference 31: 1 32144 [Ljava.lang.ref.WeakReference; 106: 17 952 com.sun.jmx.mbeanserver.WeakIdentityHashMap$IdentityWeakReference user@t1007:~ jmap -d64 -histo:live 29201|grep WeakReference 8: 23191 1113168 java.lang.ref.WeakReference 31: 1 32144 [Ljava.lang.ref.WeakReference; 103: 17 952 com.sun.jmx.mbeanserver.WeakIdentityHashMap$IdentityWeakReference user@t1007:~ jmap -d64 -histo:live 29201|grep WeakReference 8: 23804 1142592 java.lang.ref.WeakReference 31: 1 32144 [Ljava.lang.ref.WeakReference; 103: 17 952 com.sun.jmx.mbeanserver.WeakIdentityHashMap$IdentityWeakReference Note that jmap command forces FullGC. JVM settings: export JVM_OPT="\ -d64 \ -Xms200m -Xmx200m \ -XX:MaxNewSize=64m \ -XX:NewSize=64m \ -XX:+UseParNewGC \ -XX:+UseConcMarkSweepGC \ -XX:MaxTenuringThreshold=10 \ -XX:SurvivorRatio=2 \ -XX:CMSInitiatingOccupancyFraction=60 \ -XX:+UseCMSInitiatingOccupancyOnly \ -XX:+CMSParallelRemarkEnabled \ -XX:+DisableExplicitGC \ -XX:+CMSClassUnloadingEnabled \ -XX:+PrintGCTimeStamps \ -XX:+PrintGCDetails \ -XX:+PrintTenuringDistribution \ -XX:+PrintGCApplicationConcurrentTime \ -XX:+PrintGCApplicationStoppedTime \ -XX:+PrintGCApplicationStoppedTime \ -XX:+PrintClassHistogram \ -XX:+ParallelRefProcEnabled \ -XX:SoftRefLRUPolicyMSPerMB=1 \ -verbose:gc \ -Xloggc:$GCLOGFILE" java version "1.6.0_18" Java(TM) SE Runtime Environment (build 1.6.0_18-b07) Java HotSpot(TM) Server VM (build 16.0-b13, mixed mode) Solaris 10/Sun Fire(TM) T1000

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• Logging exceptions during bean injection

  - by Marc W

  I think this is a pretty basic question, but after Googling around I can't seem to find the answer. What I need is a way to log some custom output with log4j during Spring bean construction. I have a factory class called ResponderFactory (being used as an instance factory in Spring) with a factory method that can throw 2 different types of exception. public CollectorResponder collectorResponder(String inputQueueName) throws ConfigurationException, BrokerConnectionException {} Now, normally I could wrap a call to this method in a try-catch block with 2 catch clauses to handle the logging situations for each of the exceptions. However, if I'm using Spring to inject this CollectorResponder, created with the factory, into another class I don't see how this is possible. <bean id="responderFactory" class="com.package.ResponderFactory"> <constructor-arg index="0" ref="basicDispatcher" /> <constructor-arg index="1" value="http://localhost:9000" /> </bean> <bean id="collectorResponder" class="com.package.CollectorResponder" factory-bean="responderFactory" factory-method="collectorResponder"> <constructor-arg value="collector.in" /> </bean> <bean id="collectorConsumer" class="com.package.CollectorConsumer"> <constructor-arg ref="collectorResponder" /> </bean> Again, I want to catch these exceptions when the collectorResponder bean is instantiated. Right now I'm dealing with this is CollectorConsumer when I instantiate using new CollectorResponder(...). Is there any way I can do this?

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• Find all substrings of a string - StringIndexOutOfBoundsException

  - by nazar_art

  I created class Word. Word has a constructor that takes a string argument and one method getSubstrings which returns a String containing all substring of word, sorted by length. For example, if the user provides the input "rum", the method returns a string that will print like this: r u m ru um rum I want to concatenate the substrings in a String, separating them with a newline ("\n"). Then return the string. Code: public class Word { String word; public Word(String word) { this.word = word; } /** * Gets all the substrings of this Word. * @return all substrings of this Word separated by newline */ public String getSubstrings() { String str = ""; int i, j; for (i = 0; i < word.length(); i++) { for (j = 0; j < word.length(); j++) { str = word.substring(i, i + j); str += "\n"; } } return str; } But it throws exception: java.lang.StringIndexOutOfBoundsException: String index out of range: -1 at java.lang.String.substring(String.java:1911) I stuck at this point. Maybe, you have other suggestions according this method signature public String getSubstrings(). How to solve this issue?

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• ERROR! (Using Excel's named ranges from C#)

  - by mcoolbeth

  In the following, I am trying to persist a set of objects in an excel worksheet. Each time the function is called to store a value, it should allocate the next cell of the A column to store that object. However, an exception is thrown by the Interop library on the first call to get_Range(). (right after the catch block) Does anyone know what I am doing wrong? private void AddName(string name, object value) { Excel.Worksheet jresheet; try { jresheet = (Excel.Worksheet)_app.ActiveWorkbook.Sheets["jreTemplates"]; } catch { jresheet = (Excel.Worksheet)_app.ActiveWorkbook.Sheets.Add(Type.Missing, Type.Missing, Type.Missing, Type.Missing); jresheet.Visible = Microsoft.Office.Interop.Excel.XlSheetVisibility.xlSheetVeryHidden; jresheet.Name = "jreTemplates"; jresheet.Names.Add("next", "A1", true, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing); } Excel.Range cell = jresheet.get_Range("next", Type.Missing); cell.Value2 = value; string address = ((Excel.Name)cell.Name).Name; _app.ActiveWorkbook.Names.Add(name, address, false, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing); cell = cell.get_Offset(1, 0); jresheet.Names.Add("next", ((Excel.Name)cell.Name).Name, true, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing); }

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• Any good tools or tips for fuzz testing Windows forms applications?

  - by Ogre Psalm33

  I'm maintaining a ~300K LOC C# legacy thick-client application with a Windows.Forms interface. The app is full of little bugs and quirks. For example, I recently discovered a bug where if a users edits and tabs (not clicks) through cells on a DataViewGrid, and leaves the a certain cell selected, the app gets an "Object reference not set to an instance of an object" exception. I discover (or get a bug report of) something new like this about every week or two. I've had enough, and was thinking of trying some sort of fuzz testing on the application to try to ferret out undiscovered issues. If I roll-my-own fuzz testing, I'd assume I at least need to be able to generate test harnesses that run pieces of my app (main window, FormX, FormY, FormZ, ...) independently and try to inject events into them. I was trying to look for tools suited for this, but so far have come up with nothing for Win Forms. (There seems to be no shortage of fuzz testing tools for web apps, however). Any helpful ideas?

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• What Language Feature Can You Just Not Live Without?

  - by akdom

  I always miss python's built-in doc strings when working in other languages. I know this may seem odd, but it allows me to cut down significantly on excess comments while still providing a clean description of my code and any interfaces therein. What Language Feature Can You Just Not Live Without? If someone were building a new language and they asked you what one feature they absolutely must include, what would it be? This is getting kind of long, so I figured I'd do my best to summarize: Paraphrased to be language agnostic. If you know of a language which uses something mentioned, please at it in the parenthesis to the right of the feature. And if you have a better format for this list, by all means try it out (if it doesn't seem to work, I'll just roll back). Regular Expressions ~ torial (Perl) Garbage Collection ~ SaaS Developer (Python, Perl, Ruby, Java, .NET) Anonymous Functions ~ Vinko Vrsalovic (Lisp, Python) Arithmetic Operators ~ Jeremy Ross (Python, Perl, Ruby, Java, C#, Visual Basic, C, C++, Pascal, Smalltalk, etc.) Exception Handling ~ torial (Python, Java, .NET) Pass By Reference ~ Chris (Python) Unified String Format WalloWizard (C#) Generics ~ torial (Python, Java, C#) Integrated Query Equivalent to LINQ ~ Vyrotek (C#) Namespacing ~ Garry Shutler () Short Circuit Logic ~ Adam Bellaire ()

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