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  • Facing problem in accessing webservice

    - by Muhammad Waqas
    System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.Web.Services2.WebServicesExtension.AfterSerializeServer(SoapServerMessage message) Above exception is thrown whenever i try to access any method of webservice on another machine. Regards, Muhammad Waqas

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  • Help with chat server

    - by mithun1538
    I am designing a chat server in java. The communication is Http based and not socket based. In the client side I have an applet. In the server side I have a servlet. Applet: I create a new thread to listen for incoming messages(GET method). The main thread is used to send messages(POST messages). The partial code is : public void start() { System.out.println("Creating new thread"); Thread thread = new Thread(this); thread.start(); } private String getNewMessage() { System.out.println("Inside getNewMessage"); String msg = null; try { while(msg == null) { System.out.println("Trying to listen to servlet"); URL servlet = new URL(getCodeBase(), "NewServlet?mode=msg"); URLConnection con = servlet.openConnection(); con.setUseCaches(false); DataInputStream din = new DataInputStream(new BufferedInputStream(con.getInputStream())); msg = din.readUTF(); System.out.println("message read :" + msg); } } catch (Exception e) { e.printStackTrace(); } return msg + "\n"; } public void run() { System.out.println("Inside new thread"); while(true) { System.out.println("inside first while"); String newMsg = getNewMessage(); chatOutput.append(newMsg); System.out.println("Appended!!"); } } private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { String message = chatInput.getText(); chatInput.setText(""); chatOutput.append(message + "\n"); try { System.out.println("Trying to send msg :" + message); URL url = new URL(getCodeBase(), "NewServlet"); URLConnection servletConnection = url.openConnection(); servletConnection.setDoInput(true); servletConnection.setDoOutput(true); servletConnection.setUseCaches(false); servletConnection.setRequestProperty("Content-Type", "application/octet-stream"); ObjectOutputStream out = new ObjectOutputStream(servletConnection.getOutputStream()); out.writeObject(message); out.flush(); out.close(); System.out.println("Message sent!"); } catch (Exception e) { e.printStackTrace(); } } This next code is from the servlet side. it uses the Observable interface to identify and send messages to clients. public class NewServlet extends HttpServlet { // getNextMessage() returns the next new message. // It blocks until there is one. public String getNextMessage() { // Create a message sink to wait for a new message from the // message source. System.out.println("inside getNextMessage"); return new MessageSink().getNextMessage(source);} @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println("Inside Doget"); response.setContentType("text/plain"); PrintWriter out = response.getWriter(); out.println(getNextMessage()); } // broadcastMessage() informs all currently listening clients that there // is a new message. Causes all calls to getNextMessage() to unblock. public void broadcastMessage(String message) { // Send the message to all the HTTP-connected clients by giving the // message to the message source source.sendMessage(message); } @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { System.out.println("Inside DoPost"); try { ObjectInputStream din= new ObjectInputStream(request.getInputStream()); String message = (String)din.readObject(); System.out.println("received msg"); if (message != null) broadcastMessage(message); System.out.println("Called broadcast"); // Set the status code to indicate there will be no response response.setStatus(response.SC_NO_CONTENT); } catch (Exception e) { e.printStackTrace(); } } /** * Returns a short description of the servlet. * @return a String containing servlet description */ @Override public String getServletInfo() { return "Short description"; } MessageSource source = new MessageSource();} class MessageSource extends Observable { public void sendMessage(String message) { System.out.println("inside sendMsg"); setChanged(); notifyObservers(message); } } class MessageSink implements Observer { String message = null; // set by update() and read by getNextMessage() // Called by the message source when it gets a new message synchronized public void update(Observable o, Object arg) { // Get the new message message = (String)arg; // Wake up our waiting thread notify(); } // Gets the next message sent out from the message source synchronized public String getNextMessage(MessageSource source) { // Tell source we want to be told about new messages source.addObserver(this); System.out.println("AddedObserver"); // Wait until our update() method receives a message while (message == null) { try { wait(); } catch (Exception ignored) { } } // Tell source to stop telling us about new messages source.deleteObserver(this); // Now return the message we received // But first set the message instance variable to null // so update() and getNextMessage() can be called again. String messageCopy = message; message = null; System.out.println("Returning msg"); return messageCopy; } } As you can see I have included System.out.println("Some message"); in some places. this was just for debugging purposes. In java console, i get the following output: Creating new thread Inside new thread. inside first while. Inside getNewMessage. Trying to listen to servlet. In the servlet side, i get the following output in the tomcat logs: Inside Doget. inside getNextMessage. AddedObserver. After i type a message in the applet, and send it, I get the foll output in java console: Trying to send msg :you deR?? Message sent! But in servlet side, I dont get anything in the logs. I used the O'Reily Java Servlet Programming as reference(The observer interface comes from there). But I am not getting any chat communication between two clients. As can be understood from the logs, the POST method is not called. Any reason for this?

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  • Show count of all google map markers

    - by aland
    Is there any easy way using the api to get a count of all markers on a map? I have a page similar to this http://www.gorissen.info/Pierre/maps/googleMapLocationv3.php where a user can add markers by clicking on the map. I'd also like to show a count of all the markers. I could do this by declaring a global count var and incrementing it in the event listener, but I thought it would be better if there was an API method I could use and I can find it in the docs.

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  • How to know if two stocks move togheter?

    - by Damiano
    Hello, I have two stocks with their prices, example: STOCK1: 10.56 11.23 12.32 8.90 STOCK2: 1.26 5.80 3.26 10.3 I only found Pearson correlation, but, is there another method to know if two stocks move togheter? (esample: co-integration??) Thank you so much!

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  • FREED(id): message release sent to freed object error solution ?

    - by Meko
    Hi.In my Iphone app I am getting: objc[597]: FREED(id): message release sent to freed object=0x3b81780 error.What should cause this error?IS it about memory allocation? I have UITable and model view that include some text field.It takes username from model view and search this in internet and gets some images from internet.It takes data but when model view disappears app exits.and gives that error.When model views close it runs my method and gets value.But it exits from app.

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  • how select all cell while selected JTable value?

    - by Venkats
    First i gave all values of row in JTAble. While inserting table values into database, I selected all values of row in JTable, using the following model.getValueAt(rowIndex,colIndex); But this method gets all the columns except the last inserted column in a row. If i pressed enter key, after getting all values it done well. How to get all columns in a row with out pressed enter key?

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  • SHA1 hash question

    - by phenevo
    Hi, I have this method to hash a string: byte[] buffer = enc.GetBytes(text); SHA1CryptoServiceProvider cryptoTransformSHA1 = new SHA1CryptoServiceProvider(); string hash = BitConverter.ToString( cryptoTransformSHA1.ComputeHash(buffer)).Replace("-", ""); return hash; My question is: Is the resulting hash always the same for the same string? I hashed a string a couple of days ago and it seems that it now resulted in another hash, but i'm not sure.

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  • UIImagePickerController does not deliver geo tag data

    - by Gregory Mace
    When I use UIImagePickerController to select a photo, either from the Camera Roll or the Photo Library, the image that gets returned to me in the method 'didFinishPickingImage' does not contain the exif data for latitude and longitude. I know that the headers are there, because they show up when imported into iPhoto, also if I upload images from the Camera Roll, they also contain the exif headers for location. Is there a way to get UIImagePickerController to deliver that information as well?

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  • PHP: optimum configuration storage ?

    - by Jerome WAGNER
    Hello, My application gets configured via a lot of key/values (let's say 30.000 for instance) I want to find the best deployment method for these configurations, knowing that I want to avoid DEFINEs to allow for runtime re-configuration. I have thought of - pre-compiling them into an array via a php file - pre-compiling them into a tmpfs sqlite database - pre-compiling them into a memcached db what are my options for the best random access time to these configuration (memory is not an issue) ? Thanks Jerome

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  • How to make working binary using llvm

    - by prosseek
    I want to get the working binary out of llvm, using step by step method. I'm working on Snow Leopard. llvm-gcc h.c -emit-llvm -S -o hi.ll - hi.ll llvm-as hi.ll - hi.bc (jit binary?) llc hi.bc - hi.s (assembly code) How can I get the binary to run on Mac OS X with hi.bc?

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  • JQuery hover problem

    - by tim
    Hello, Im using jquery hover method to call a function as follows $(<some_element>).hover(function(){animate("next",true);},function(){}); But,the animate function is called only when the mouse enters the element. I want it to keep getting called as long as the mouse is over the element also. Any way to achieve this ? Thank You.

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  • Copying Excel Worksheets in POI

    - by Patrick Nichols
    Does anyone know of a means to copy a worksheet from one workbook to another using POI? The Workbook class has a cloneSheet method, but there doesn't seem to be able to insert a cloned sheet into a new workbook? If there isn't an API to do this easily, does anyone have the code to copy all of the data (styles, column widths, data, etc) from one sheet to another? The jxls has methods to copy sheets, but they don't work when copying between workbooks.

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  • Best way XML File handling bullet point •

    - by dbengals
    For an XML file I am creating I have data that contains a bullet • what is the best method for handling this in xml data? It opens in an XML editor and reads fine, but I cannot import the file via SSIS, I get an error regarding this point. <xmldata>• Bullet</xmldata> Renders fine, but cannot import with SSIS.

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  • Using regexkitlite with strings containing % signs

    - by David Liu
    So I'm using RegexKitLite in my iPhone app, and I'm basically grabbing out a bunch of URLs and names from within a web page. The problem is that whenever it comes across a URL with URL encoded characters like %22 for a double quote or %27 for a single quote, the captured string basically gives me a jumbled overflowed string, containing garbage and even method names. I'm really not doing anything particularly special within the regex, just your basic "startdelimiter(.*)enddelimiter" regex.

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  • place and show pixel in the Cartesian plane graph in JavaFX

    - by user3671803
    I have this method to draw the Cartesian plane in JavaFX, using canvas and would like to know if it is possible to place or show the pixel: public class Grafics extends StackPane { private Canvas canvas; public void Grafics(){ GridPane grid = new GridPane(); grid.setPadding(new Insets(5)); grid.setHgap(10); grid.setVgap(10); canvas = new Canvas(); canvas.setHeight(500); canvas.setWidth(700); GridPane.setHalignment(canvas, HPos.CENTER); grid.add(canvas, 0, 2); GraphicsContext gc = canvas.getGraphicsContext2D(); gc.setFill(Color.BLACK); gc.fillRect(0, 0, canvas.getWidth(), canvas.getHeight()); gc.setFill(Color.WHITE); gc.fillRect(1, 1, canvas.getWidth() - 2, canvas.getHeight() - 2); drawAxesXY(gc); //call the method drawAxes getChildren().addAll(grid);// add an gridpane in stackpane } private void drawAxesXY(GraphicsContext gc1) { PixelWriter pixelWriter = canvas.getGraphicsContext2D().getPixelWriter(); gc1.setFill(Color.WHITE); gc1.setStroke(Color.BLACK); gc1.setLineWidth(1.5); gc1.strokeText("Y", 350, 30); gc1.scale(1, 1); gc1.translate((canvas.getHeight() / 50) - (canvas.getWidth() / 10), canvas.getHeight() / 50); gc1.strokeLine(canvas.getWidth() - 300, canvas.getWidth() - 300, canvas.getHeight() - 100, canvas.getHeight() / 30); pixelWriter.setColor(300, 300, Color.RED); gc1.strokeText("X", 620, 220); gc1.translate(canvas.getWidth() - (canvas.getHeight() / 10), -220); gc1.rotate(90.0); gc1.setFill(Color.WHITE); gc1.setStroke(Color.RED); gc1.setLineWidth(1.5); gc1.strokeLine(canvas.getWidth() - 250, canvas.getWidth() - 250, canvas.getHeight() - 50, canvas.getHeight() / 30); pixelWriter.setColor(620, 220, Color.RED); } } I put a line black and the other red http://postimg.org/image/tewjhco4z/ and I wanna know if is possible to place or show the pixel in Figure like this http://postimg.org/image/98k9mvnb3/

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  • How to get Locale from its String representation in Java?

    - by Joonas Pulakka
    Is there a neat way of getting a Locale instance from its "programmatic name" as returned by Locale's toString() method? An obvious and ugly solution would be parsing the String and then constructing a new Locale instance according to that, but maybe there's a better way / ready solution for that? The need is that I want to store some locale specific settings in a SQL database, including Locales themselves, but it would be ugly to use serialized Locale objects there. I would rather store their String representations, which seem to be quite adequate in detail.

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  • When a popover row is selected, how is - (void)setDetailItem:(id)newDetailItem called??

    - by dalton-hamilton
    I've created a TabBar application and in one of the views I'm using a popover. The view is registered for UIPopoverControllerDelegate but that doesn't do it. The popover is a completely different view controller and xib. When the user selects a row in the popover, control goes to the popovercontroller.m method - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath Any help would be appreciated. Best Regard Dalton Hamilton

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  • Difficulties with google authentication

    - by user283405
    I am trying to authenticate google with the following code but google sent me back to the login page again. //STEP# 1 string loginURL = "https://www.google.com/accounts/ServiceLoginBox?service=analytics&nui=1&hl=en-US&continue=https%3A%2F%2Fwww.google.com%2Fanalytics%2Fsettings%2F%3Fet%3Dreset%26hl%3Den%26et%3Dreset%26hl%3Den-US"; request = (HttpWebRequest)WebRequest.Create(loginURL); request.CookieContainer = cookieJar; request.Method = "GET"; request.KeepAlive = true; request.UserAgent = "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.4) Gecko/2008111217 Fedora/3.0.4-1.fc10 Firefox/3.0.4"; HttpWebResponse response = (HttpWebResponse)request.GetResponse(); foreach (Cookie cook in response.Cookies) { cookieJar.Add(cook); } using (StreamReader sr = new StreamReader(response.GetResponseStream()) ) { serverResponse = sr.ReadToEnd(); sr.Close(); } galx = ExtractValue(serverResponse,"GALX","name=\"GALX\" value=\""); Console.WriteLine(galx); //Request# 2 string uriWithData = "https://www.google.com/accounts/ServiceLoginBoxAuth"; request = (HttpWebRequest)WebRequest.Create(uriWithData); request.KeepAlive = true; request.UserAgent = "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.4) Gecko/2008111217 Fedora/3.0.4-1.fc10 Firefox/3.0.4"; request.Method = "POST"; request.CookieContainer = cookieJar; string param = string.Format("Email={0}&Passwd={1}&continue={2}&service=analytics&nui=1&dsh=8209101995200094904&GALX={3}&hl=en-US&PersistentCookie=yes","**my email address**",p,"",galx); byte[] postArr = StrToByteArray(param); request.ContentType = @"application/x-www-form-urlencoded"; request.ContentLength = param.Length; Stream reqStream = request.GetRequestStream(); reqStream.Write(postArr,0,postArr.Length); reqStream.Close(); response = (HttpWebResponse)request.GetResponse(); foreach (Cookie cook in response.Cookies) { cookieJar.Add(cook); } using (StreamReader sr = new StreamReader(response.GetResponseStream()) ) { serverResponse = sr.ReadToEnd(); Console.WriteLine(serverResponse); // Close and clean up the StreamReader sr.Close(); }

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  • NNTP usenet download messages

    - by stighy
    Hi stackoverflow gurus! I would like to download usenet messages to my personal Mysql database, so without using any newsreader. At the moment i'm using IpWorks component for .NET . I've created a simple app in Vb.Net, It works, but it's realy slow... to download and to do the INSERT INTO . Anyone know some better method to "massive" download message and insert it into a simple mysql table ? Thanks in advance !

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  • FireandForget delegate - c#

    - by uno
    I came across this link, link text In the article, where the author has definition of this method static void WriteIt(string first, string second, int num) I changed that in my test app to this static void WriteIt(CustomerObject Customer) { fileIO.CreateFile(XMLUtil.Serialize(Customer)); } Where public static string Serialize(object o) { System.Xml.Serialization.XmlSerializerNamespaces ns = new System.Xml.Serialization.XmlSerializerNamespaces(); ns.Add("", ""); return Serialize(o, ns); } public static string Serialize(object o, XmlSerializerNamespaces ns) { try { using (System.IO.MemoryStream m = new System.IO.MemoryStream()) { //serialize messagelist to xml XmlSerializer serializer = new XmlSerializer(o.GetType(), ""); if (ns != null) serializer.Serialize(m, o, ns); else serializer.Serialize(m, o); m.Position = 0; byte[] b = new byte[m.Length]; m.Read(b, 0, b.Length); return System.Text.UTF8Encoding.UTF8.GetString(b); } } catch (Exception ex) { return "Ex = " + ex.ToString(); } } This method always gives an exception static void EndWrapperInvoke (IAsyncResult ar) { wrapperInstance.EndInvoke(ar); ar.AsyncWaitHandle.Close(); } Stacktrace: Server stack trace: at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner) at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner) at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks) at System.Delegate.DynamicInvokeImpl(Object[] args) at System.Delegate.DynamicInvoke(Object[] args) at SRC.FileMover.ThreadUtil.InvokeWrappedDelegate(Delegate d, Object[] args) at System.Runtime.Remoting.Messaging.StackBuilderSink._PrivateProcessMessage(IntPtr md, Object[] args, Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]& outArgs) at System.Runtime.Remoting.Messaging.StackBuilderSink.PrivateProcessMessage(RuntimeMethodHandle md, Object[] args, Object server, Int32 methodPtr, Boolean fExecuteInContext, Object[]& outArgs) at System.Runtime.Remoting.Messaging.StackBuilderSink.AsyncProcessMessage(IMessage msg, IMessageSink replySink) Exception rethrown at [0]: at System.Runtime.Remoting.Proxies.RealProxy.EndInvokeHelper(Message reqMsg, Boolean bProxyCase) at System.Runtime.Remoting.Proxies.RemotingProxy.Invoke(Object NotUsed, MessageData& msgData) at SRC.FileMover.ThreadUtil.DelegateWrapper.EndInvoke(IAsyncResult result) at SRC.FileMover.ThreadUtil.EndWrapperInvoke(IAsyncResult ar) at System.Runtime.Remoting.Messaging.AsyncResult.SyncProcessMessage(IMessage msg) at System.Runtime.Remoting.Messaging.StackBuilderSink.AsyncProcessMessage(IMessage msg, IMessageSink replySink) at System.Runtime.Remoting.Proxies.AgileAsyncWorkerItem.DoAsyncCall() at System.Runtime.Remoting.Proxies.AgileAsyncWorkerItem.ThreadPoolCallBack(Object o) at System.Threading._ThreadPoolWaitCallback.WaitCallback_Context(Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack) at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state) UPDATE 1: Trying to run my app and get the full exception. It seems like its happening at different locations. I will repost my ? again shortly. I think it may be wise if I can post my application. Can i upload a .zip file or is it better to just post the .cs code that I am using?

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  • Allowing user to select a UIPickerView row by tapping.

    - by camilo
    Hi. I'm trying to use a UIPicker View with a behavior somehow different of what's usually seen in iPhone code examples. What I want to do is to allow users to scroll through the picker contents, but not to select a picker's row automatically (using the "didSelectRow" method from picker's delegate). Instead, I want to allow the user to touch the center row of the picker, which gets highlighted, and becomes the selection. Is there any way to achieve this? Thanks in advance.

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