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  • Ninject - initialise objects

    - by James Lin
    Hi guys, I am new to ninject, I am wondering how I can run custom initizlisation code when constructing the injected objects? ie. I have a Sword class which implements IWeapon, but I want to pass an hit point value to the Sword class constructor, how do I achieve that? Do I need to write my own provider? A minor question, IKernel kernel = new StandardKernel(new Module1(), new Module2(), ...); what is the actual use of having multiple modules in Kernel? I sorta understand it, but could someone give me a formal explaination and use case? Thanks a lot! James

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  • What do you think about ??= operator in C#?

    - by TN
    Do you think that C# will support something like ??= operator? Instead of this: if (list == null) list = new List<int>(); It might be possible to write: list ??= new List<int>(); Now, I could use (but it seems to me not well readable): list = list ?? new List<int>();

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  • Why can't I fetch an AOL captcha image in my Delphi program?

    - by Bill
    New demo code: I am trying to get the captcha image from a AOL, and i keep getting an error 418. unit imageunit; /// /// h t t p s://new.aol.com/productsweb/ /// interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, IdIOHandler, IdIOHandlerSocket, IdIOHandlerStack, IdSSL, IdSSLOpenSSL, IdIntercept, IdZLibCompressorBase, IdCompressorZLib, IdCookieManager, IdBaseComponent, IdComponent, IdTCPConnection, IdTCPClient, IdHTTP,jpeg,GIFImg, ExtCtrls, PerlRegEx; type TForm2 = class(TForm) IdHTTP1: TIdHTTP; IdCookieManager1: TIdCookieManager; IdCompressorZLib1: TIdCompressorZLib; IdConnectionIntercept1: TIdConnectionIntercept; IdSSLIOHandlerSocketOpenSSL1: TIdSSLIOHandlerSocketOpenSSL; Panel1: TPanel; Image1: TImage; Panel2: TPanel; Button1: TButton; PerlRegEx1: TPerlRegEx; Memo1: TMemo; procedure Button1Click(Sender: TObject); private { Private declarations } public { Public declarations } end; var Form2: TForm2; implementation {$R *.dfm} function getaimcaptchaimage(data:string):string; var Regex: TPerlRegEx; ResultString: string; begin Regex := TPerlRegEx.Create(nil); Regex.RegEx := '= 1 then begin ResultString := Regex.SubExpressions[1]; end; result:=Resultstring; end; end; procedure TForm2.Button1Click(Sender: TObject); var JPI : TJPEGImage; streamdata:TMemoryStream; SStream: Tstringstream; website:string; begin streamdata := TMemoryStream.Create; SStream := tstringstream.Create ( '' ); try idhttp1.Get('h t t p s://new.aol.com/productsweb/',SStream); memo1.Text:=UTF8ToWideString ( SStream.DataString ); website:='h t t p s://new.aol.com/productsweb/WordVerImage'+getaimcaptchaimage( UTF8ToWideString ( SStream.DataString )); form2.Caption:=website; idhttp1.Get(website, Streamdata); Except { Handle exceptions } On E : Exception Do Begin MessageDlg('Exception: '+E.Message,mtError, [mbOK], 0); End; End; //h t t p s://new.aol.com/productsweb/WordVerImage?20890843 //h t t p s://new.aol.com/productsweb/WordVerImage?91868359 /// /// gives error 418 unused /// streamdata.Position := 0; JPI := TJPEGImage.Create; Try JPI.LoadFromStream ( streamdata ); Finally Image1.Picture.Assign ( JPI ); JPI.Free; streamdata.Free; End; end; end. Form: object Form2: TForm2 Left = 0 Top = 0 Caption = 'Form2' ClientHeight = 247 ClientWidth = 480 Color = clBtnFace Font.Charset = DEFAULT_CHARSET Font.Color = clWindowText Font.Height = -11 Font.Name = 'Tahoma' Font.Style = [] OldCreateOrder = False PixelsPerInch = 96 TextHeight = 13 object Panel1: TPanel Left = 0 Top = 41 Width = 480 Height = 206 Align = alClient TabOrder = 0 object Image1: TImage Left = 1 Top = 1 Width = 478 Height = 115 Align = alClient ExplicitLeft = 5 ExplicitTop = 17 ExplicitWidth = 200 ExplicitHeight = 70 end object Memo1: TMemo Left = 1 Top = 116 Width = 478 Height = 89 Align = alBottom TabOrder = 0 ExplicitLeft = 80 ExplicitTop = 152 ExplicitWidth = 185 end end object Panel2: TPanel Left = 0 Top = 0 Width = 480 Height = 41 Align = alTop TabOrder = 1 object Button1: TButton Left = 239 Top = 6 Width = 75 Height = 25 Caption = 'Button1' TabOrder = 0 OnClick = Button1Click end end object IdHTTP1: TIdHTTP Intercept = IdConnectionIntercept1 IOHandler = IdSSLIOHandlerSocketOpenSSL1 MaxAuthRetries = 100 AllowCookies = True HandleRedirects = True RedirectMaximum = 100 ProxyParams.BasicAuthentication = False ProxyParams.ProxyPort = 0 Request.ContentLength = -1 Request.Accept = 'image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-s' + 'hockwave-flash, application/cade, application/xaml+xml, applicat' + 'ion/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-' + 'application, */*' Request.BasicAuthentication = False Request.Referer = 'http://www.yahoo.com' Request.UserAgent = 'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.1) Gecko/201001' + '22 firefox/3.6.1' HTTPOptions = [hoForceEncodeParams] CookieManager = IdCookieManager1 Compressor = IdCompressorZLib1 Left = 40 Top = 160 end object IdCookieManager1: TIdCookieManager Left = 360 Top = 136 end object IdCompressorZLib1: TIdCompressorZLib Left = 408 Top = 56 end object IdConnectionIntercept1: TIdConnectionIntercept Left = 304 Top = 72 end object IdSSLIOHandlerSocketOpenSSL1: TIdSSLIOHandlerSocketOpenSSL Intercept = IdConnectionIntercept1 MaxLineAction = maException Port = 0 DefaultPort = 0 SSLOptions.Mode = sslmUnassigned SSLOptions.VerifyMode = [] SSLOptions.VerifyDepth = 0 Left = 192 Top = 136 end object PerlRegEx1: TPerlRegEx Options = [] Left = 120 Top = 56 end end If you go to h t t p s://new.aol.com/productsweb/ you will notice the captcha image has a url like h t t p s://new.aol.com/productsweb/WordVerImage?91868359 I put that url in the edit box and get an error. What is wrong with this code? *take the extra spaces out of the URLs

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  • what is the difference between response.redirect and response status 301 redirects in asp ?

    - by Nikhil Vaghela
    Our asp application is moving to new server and i want to implement a permenant url redirection. I am aware of following two approaches , i need to understand which one to user over other and when ? Option 1: <%@ Language=VBScript %><% Response.Redirect “http://www.new-url.com” %> Option 2: <%@ Language=VBScript %><% Response.Status="301 Moved Permanently" Response.AddHeader "Location","http://www.new-url.com/" %> Thanks, Nikhil.

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  • Authenticating a single request with httpclient 4.x

    - by scompt.com
    I have an HttpClient instance that's shared by a number of threads. I would like to use it to make a single authenticated request. Because only the single request should be authenticated, I don't want to modify the HttpClient instance as described in the documentation. Here's what I've worked out instead, which isn't working. From what I can tell, it doesn't look like the CredentialsProvider is being used at all. Any tips? HttpContext context = null; if(feedSpec.isAuthenticated()) { context = new BasicHttpContext(); CredentialsProvider credsProvider = new BasicCredentialsProvider(); credsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(feedSpec.getHttpUsername(), feedSpec.getHttpPassword())); context.setAttribute(ClientContext.CREDS_PROVIDER, credsProvider); context.setAttribute(ClientPNames.HANDLE_AUTHENTICATION, true); } HttpGet httpGet = new HttpGet(feedSpec.getUri()); HttpResponse httpResponse = httpClient.execute(httpGet, context);

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  • In NHIbernate, why does SaveOrUpdate() update the Version, but SaveOrUpdateCopy() doesn't?

    - by Daniel T.
    I have a versioned entity, and this is what happens when I use SaveOrUpdate() vs. SaveOrUpdateCopy(): // create new entity var entity = new Entity{ Id = Guid.Empty }); Console.WriteLine(entity.Version); // prints out 0 // save the new entity GetNewSession(); entity.SaveOrUpdate(); Console.WriteLine(entity.Version); // prints out 1 GetNewSession(); // loads the persistent entity into the session, so we have to use // SaveOrUpdateCopy() to merge the following transient entity var dbEntity = Database.GetAll<Entity>(); // new, transient entity used to update the persistent entity in the session var newEntity = new Entity{ Id = Guid.Empty }); newEntity.SaveOrUpdateCopy(); Console.WriteLine(entity.Version); // prints out 1, but should be 2 Why is the version number is not updated for SaveOrUpdateCopy()? As I understand it, the transient entity is merged with the persistent entity. The SQL calls confirm that the data is updated. At this point, shouldn't newEntity become persistent, and the version number incremented?

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  • Javascript Square bracket notation for global variables

    - by Yousuf Haider
    I ran into an interesting issue the other day and was wondering if someone could shed light on why this is happening. Here is what I am doing (for the purposes of this example I have dumbed down the example somewhat): I am creating a globally scoped variable using the square bracket notation and assigning it a value. Later I declare a var with the same name as the one I just created above. Note I am not assigning a value. Since this is a redeclaration of the same variable the old value should not be overriden as described here: http://www.w3schools.com/js/js_variables.asp //create global variable with square bracket notation window['y'] = 'old'; //redeclaration of the same variable var y; if (!y) y = 'new'; alert(y); //shows New instead of Old The problem is that the old value actually does get overriden and in the above eg. the alert shows 'new' instead of 'old'. Why ? I guess another way to state my question is how is the above code different in terms of semantics from the code below: //create global variable var y = 'old'; //redeclaration of the same variable var y; if (!y) y = 'new'; alert(y); //shows New instead of Old

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  • How to configure maximum number of transport channels in WCF using basicHttpBinding?

    - by Hemant
    Consider following code which is essentially a WCF host: [ServiceContract (Namespace = "http://www.mightycalc.com")] interface ICalculator { [OperationContract] int Add (int aNum1, int aNum2); } [ServiceBehavior (InstanceContextMode = InstanceContextMode.PerCall)] class Calculator: ICalculator { public int Add (int aNum1, int aNum2) { Thread.Sleep (2000); //Simulate a lengthy operation return aNum1 + aNum2; } } class Program { static void Main (string[] args) { try { using (var serviceHost = new ServiceHost (typeof (Calculator))) { var httpBinding = new BasicHttpBinding (BasicHttpSecurityMode.None); serviceHost.AddServiceEndpoint (typeof (ICalculator), httpBinding, "http://172.16.9.191:2221/calc"); serviceHost.Open (); Console.WriteLine ("Service is running. ENJOY!!!"); Console.WriteLine ("Type 'stop' and hit enter to stop the service."); Console.ReadLine (); if (serviceHost.State == CommunicationState.Opened) serviceHost.Close (); } } catch (Exception e) { Console.WriteLine (e); Console.ReadLine (); } } } Also the WCF client program is: class Program { static int COUNT = 0; static Timer timer = null; static void Main (string[] args) { var threads = new Thread[10]; for (int i = 0; i < threads.Length; i++) { threads[i] = new Thread (Calculate); threads[i].Start (null); } timer = new Timer (o => Console.WriteLine ("Count: {0}", COUNT), null, 1000, 1000); Console.ReadLine (); timer.Dispose (); } static void Calculate (object state) { var c = new CalculatorClient ("BasicHttpBinding_ICalculator"); c.Open (); while (true) { try { var sum = c.Add (2, 3); Interlocked.Increment (ref COUNT); } catch (Exception ex) { Console.WriteLine ("Error on thread {0}: {1}", Thread.CurrentThread.Name, ex.GetType ()); break; } } c.Close (); } } Basically, I am creating 10 proxy clients and then repeatedly calling Add service method. Now if I run both applications and observe opened TCP connections using netstat, I find that: If both client and server are running on same machine, number of tcp connections are equal to number of proxy objects. It means all requests are being served in parallel. Which is good. If I run server on a separate machine, I observed that maximum 2 TCP connections are opened regardless of the number of proxy objects I create. Only 2 requests run in parallel. It hurts the processing speed badly. If I switch to net.tcp binding, everything works fine (a separate TCP connection for each proxy object even if they are running on different machines). I am very confused and unable to make the basicHttpBinding use more TCP connections. I know it is a long question, but please help!

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  • Problem with WPF Data Binding Defined in Code Not Updating UI Elements

    - by Ben
    I need to define new UI Elements as well as data binding in code because they will be implemented after run-time. Here is a simplified version of what I am trying to do. Data Model: public class AddressBook : INotifyPropertyChanged { private int _houseNumber; public int HouseNumber { get { return _houseNumber; } set { _houseNumber = value; NotifyPropertyChanged("HouseNumber"); } } public event PropertyChangedEventHandler PropertyChanged; protected void NotifyPropertyChanged(string sProp) { if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(sProp)); } } } Binding in Code: AddressBook book = new AddressBook(); book.HouseNumber = 123; TextBlock tb = new TextBlock(); Binding bind = new Binding("HouseNumber"); bind.Source = book; bind.Mode = BindingMode.OneWay; tb.SetBinding(TextBlock.TextProperty, bind); // Text block displays "123" myGrid.Children.Add(tb); book.HouseNumber = 456; // Text block displays "123" but PropertyChanged event fires When the data is first bound, the text block is updated with the correct house number. Then, if I change the house number in code later, the book's PropertyChanged event fires, but the text block is not updated. Can anyone tell me why? Thanks, Ben

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  • How can I hot deploy using the glassfish adapter in Eclipse

    - by Greg
    Has anyone gotten the glassfish v3 adapter to work with Eclipse without restarting every time there's a code change? I tried to set this up but the adapter "republishes" every time I change any file, which is very annoying. It takes up to 3 minutes and locks up my machine for a second. I must remember to constantly stop the adapter before making any changes. I'd settle for just disabling this "feature", but even if I uncheck "publish change immediately" this behavior still happens. I'm using the latest version of the glassfish adapter and tried with eclipse 3.5 and the 3.6 milestone builds.... What setup is everyone using if you have glassfish v3 as your server? Is there any way to actually get the hot deploy feature to work correctly?

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  • Binding to WPF ViewModel properties

    - by MartinHN
    I'm just playing around with WPF and MVVM, and I have made a simple app that displays a Rectangle that changes color whenever Network availability changes. But when that happens, I get this error: Cannot use a DependencyObject that belongs to a different thread than its parent Freezable. Code XAML <Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="400" Width="600"> <DockPanel LastChildFill="True"> <Rectangle x:Name="networkStatusRectangle" Width="200" Height="200" Fill="{Binding NetworkStatusColor}" /> </DockPanel> </Window> Code-behind using System.Windows; using WpfApplication1.ViewModels; namespace WpfApplication1 { /// <summary> /// Interaction logic for Window1.xaml /// </summary> public partial class Window1 : Window { public Window1() { InitializeComponent(); DataContext = new NetworkViewModel(); } } } ViewModel using System.ComponentModel; using System.Net.NetworkInformation; using System.Windows.Media; namespace WpfApplication1.ViewModels { public class NetworkViewModel : INotifyPropertyChanged { private Brush _NetworkStatusColor; public Brush NetworkStatusColor { get { return _NetworkStatusColor; } set { _NetworkStatusColor = value; NotifyOfPropertyChange("NetworkStatusColor"); } } public NetworkViewModel() { NetworkChange.NetworkAvailabilityChanged += new NetworkAvailabilityChangedEventHandler(NetworkChange_NetworkAvailabilityChanged); } protected void NetworkChange_NetworkAvailabilityChanged(object sender, NetworkAvailabilityEventArgs e) { if (e.IsAvailable) { this.NetworkStatusColor = new SolidColorBrush(Colors.Green); } else { this.NetworkStatusColor = new SolidColorBrush(Colors.Red); } } public event PropertyChangedEventHandler PropertyChanged = delegate { }; public void NotifyOfPropertyChange(string propertyName) { PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } } I assume that I should change the NetworkStatusColor property by invoking something?

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  • [Method Error 500] in Cascading dropdown update in Ajax Control Toolkit

    - by Vinni
    I am getting [MethodError 500] when I use cascading drop down. below is my code <tr> <td > Select a Hoster: </td> <td> <asp:DropDownList ID="ddlFeaturedHoster" runat="server" ></asp:DropDownList> </td> </tr> <ajaxToolkit:CascadingDropDown ID="cddHoster" runat="server" TargetControlID="ddlFeaturedHoster" PromptText="Select a Hoster" LoadingText="Loading ..." Category="ActiveHoster" ServiceMethod="GetDropDownContents" ServicePath="~/Hosting/HostingService.asmx"/> Service Code: [WebMethod] [ScriptMethod] public CascadingDropDownNameValue[] GetActiveHosters() { List<CascadingDropDownNameValue> returnList = new List<CascadingDropDownNameValue>(); HostersManager hosterManager = new HostersManager(); List<Hosters_HostingProviderDetail> hosters = hosterManager.GetAllHosters(); returnList.Add(new CascadingDropDownNameValue("--Please Select One--","0",true)); foreach (Hosters_HostingProviderDetail item in hosters) { returnList.Add(new CascadingDropDownNameValue() { name=item.HostingProviderName, value= item.HosterID.ToString()}); } return returnList.ToArray() ; } [WebMethod] [ScriptMethod] public CascadingDropDownNameValue[] GetDropDownContents(string knownCategoryValues, string category) { knownCategoryValues = FormatCategoryWord(knownCategoryValues); List<CascadingDropDownNameValue> values = new List<CascadingDropDownNameValue>(); HostersManager hosterManager = new HostersManager(); switch (category) { case "ActiveHoster": values.AddRange(GetActiveHosters()); break; case "ActiveOffer": values.AddRange(GetActiveOffers(1)); break; } return values.ToArray<CascadingDropDownNameValue>(); } /// <summary> /// Formats the category word /// </summary> /// <param name="value"></param> /// <returns></returns> private string FormatCategoryWord(string value) { if (string.IsNullOrEmpty(value)) return value; if (value.LastIndexOf(":") > 0) value = value.Substring(value.LastIndexOf(":") + 1); if (value.LastIndexOf(";") > 0) value = value.Substring(0, value.LastIndexOf(";")); return value; } }

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  • Autocomplettextview filtered by input keys

    - by soclose
    Hi I use autocompletetextview with SimpleCursorAdapter to get data from sqlite. I'd like to get its drop down list started by the entered key. In my autocompletetextview, the list is not shown or filtered by input text. eg, If user enter "an", all text started with "an" will be seen in this list. In Java public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.new); txtPNo = (AutoCompleteTextView) findViewById(R.id.txtSTo); mDbHelper = new DBAdapter(this); mDbHelper.open(); SimpleCursorAdapter notes = fillToData(); txtPhoneNo.setAdapter(notes); } private SimpleCursorAdapter fillToData() { Cursor c = mDbHelper.getName(); startManagingCursor(c); String[] from = new String[] {DBAdapter.Name,DBAdapter.No1}; int[] to = new int[] {R.id.txtName,R.id.txtNo1}; Log.d(TAG, "cursor.getCount()=" + c.getCount()); SimpleCursorAdapter notes = new SimpleCursorAdapter(this, R.layout.autocomplete, c, from, to); return notes; } In new.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:android="http://schemas.android.com/apk/res/android" android:background="#ffffff" > <AutoCompleteTextView android:id="@+id/txtSTo" android:layout_width="fill_parent" android:layout_height="wrap_content" android:textSize="18sp" android:textColor="#000000" android:hint="To" android:completionThreshold="1" android:selectAllOnFocus="true" android:layout_alignParentTop = "true" android:layout_alignParentLeft="true"/> </RelativeLayout> In autocomplete.xml <?xml version="1.0" encoding="utf-8"?> <TableLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:stretchColumns="0" android:padding="5dp"> <TableRow android:padding="5dp"> <LinearLayout android:orientation="vertical"> <TextView android:id="@+id/txtName" xmlns:android="http://schemas.android.com/apk/res/android" android:textColor="#000000" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <TextView android:id="@+id/txtNo1" xmlns:android="http://schemas.android.com/apk/res/android" android:textColor="#000000" android:layout_width="wrap_content" android:layout_height="wrap_content"/> </LinearLayout> </TableRow> </TableLayout> How to implement to get just filtered list?

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  • Jetty 6 - QueuedThreadPool versus ThreadPool

    - by Walter White
    Hi all, I am using Jetty 6 and was wondering when the QueuedThreadPool should be used over the ThreadPool? By default, Jetty 6 comes configured with the QueuedThreadPool. My server has Java 6 installed so I was thinking that I should use the ThreadPool: <New class="org.mortbay.thread.QueuedThreadPool"> <Set name="minThreads">10</Set> <Set name="maxThreads">200</Set> <Set name="lowThreads">20</Set> <Set name="SpawnOrShrinkAt">2</Set> </New> <New class="org.mortbay.thread.concurrent.ThreadPool"> <Set name="corePoolSize">50</Set> <Set name="maximumPoolSize">50</Set> </New> Thanks, Walter

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  • How to avoid code repetition initializing final properties?

    - by Hernán Eche
    public class Code{ //many properties //... final String NEWLINE;// ohh a final property! void creation() //this method is for avoid repetition of code { //final initialization can't be put here =( Source= new StringBuffer(); //many other commons new's .. //... } Code() { NEWLINE = System.getProperty("line.separator"); creation(); } Code(String name, int numberr) { NEWLINE = System.getProperty("line.separator"); creation(); name=new Someting(name); number = new Magic(number); } }

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  • Two Way Data Binding With a Object in WPF,Image Control

    - by Candy
    Sorry, my English is not very good, I have a object "Stuffs" "Stuffs" have a Property “Icon” now: xaml <Button Click="Button_Click"><Image Width="80" Height="80" Source="{Binding Path=Icon,Converter={StaticResource ImageConverter}}"/></Button> cs private void Button_Click(object sender, RoutedEventArgs e) { IconFloder.Title = "Icon"; String IconFloderPath = AppDomain.CurrentDomain.BaseDirectory + ItemIconFloder; if (!System.IO.Directory.Exists(IconFloderPath)) System.IO.Directory.CreateDirectory(IconFloderPath); IconFloder.InitialDirectory = IconFloderPath; IconFloder.Filter = "Image File|*.jpeg"; IconFloder.ValidateNames = true; IconFloder.CheckPathExists = true; IconFloder.CheckFileExists = true; if (IconFloder.ShowDialog() == true) { HideImage.Text = ItemIconFloder + "\\" + IconFloder.SafeFileName; ((sender as Button).Content as Image).Source = new ImageConverter().Convert(ItemIconFloder + "\\" + IconFloder.SafeFileName, Type.GetType("System.Windows.Media.ImageSource"), null, new System.Globalization.CultureInfo("en-US")) as ImageSource; } } class ImageConverter:IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { if (value is string&&!String.IsNullOrEmpty(value.ToString())) { try { return new BitmapImage(new Uri(AppDomain.CurrentDomain.BaseDirectory + value)); } catch { } } return null; } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotImplementedException(); } } I would like to click buttons, change the picture, Also change Data Binding Stuffs.Icon But failed,I have no idea?I need help? I do not know whether I speak clearly

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  • Object as an array

    - by owca
    I need to create class Dog and PurebredDog extending Dog. Problem is that Dog can be at once single object and array of objects (Dogs and PurebreedDogs : Dog pack[]={new Dog(76589,"As","black",18, "Ann","Kowalsky"), new PurebreedDog(45321,"Labrador","Elf","black",25, "Angus","Mati","Barbara","Smith"), new Dog(102467,"Gamma","brown",89, "Josh","Coke"), new PurebreedDog(9678,"York","Theta","brown",8, "Emka","Figaro","Alice","Cat")}; for(int i=0; i < pack.length; i++) System.out.println(pack[i]+"\n\n"); How to write proper constructor for Dog ?

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  • SmtpClient.SendAsync - How to ensure my application doesn't finish before callback?

    - by James
    Hi, I need to send emails asychronously through a console application. I need to do some DB updates on the callback but my application is exiting before the callback code gets run! How can I stop this from happening in a nice manner rather than simply guessing how long to wait before exiting. I would imagine the Async calls get placed in some form of thread? Is it possible to check if any are waiting to be called? Sample Code private static void SendCompletedCallback(object sender, AsyncCompletedEventArgs e) { // Get the unique identifier for this asynchronous operation. String token = (string) e.UserState; if (e.Cancelled) { Console.WriteLine("[{0}] Send canceled.", token); } if (e.Error != null) { Console.WriteLine("[{0}] {1}", token, e.Error.ToString()); } else { // update DB Console.WriteLine("Message sent."); } } public static void Main(string[] args) { var users = Repository.GetUsers(); SmtpClient client = new SmtpClient("Host"); client.SendCompleted += new SendCompletedEventHandler(SendCompletedCallback); MailAddress from = new MailAddress("[email protected]", "System", Encoding.UTF8); foreach (var user in users) { MailAddress to = new MailAddress(user.Email); MailMessage message = new MailMessage(from, to); message.Body = "This is a test"; message.BodyEncoding = System.Text.Encoding.UTF8; message.Subject = "test message 1" + someArrows; message.SubjectEncoding = System.Text.Encoding.UTF8; string userState = String.Format("Message for user id {0}", user.ID); client.SendAsync(message, userState); message.Dispose(); } // need to wait here until I have received a callback for each message // otherwise the application will exit }

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  • NullReferenceException when testing DefaultModelBinder.

    - by Byron Sommardahl
    I'm developing a project using BDD/TDD techniques and I'm trying my best to stay the course. A problem I just ran into is unit testing the DefaultModelBinder. I'm using mspec to write my tests. I have a class like this that I want to bind to: public class EmailMessageInput : IMessageInput { public object Recipient { get; set; } public string Body { get; set; } } Here's how I'm building my spec context. I'm building a fake form collection and stuffing it into a bindingContext object. public abstract class given_a_controller_with_valid_email_input : given_a_controller_context { Establish additional_context = () => { var form = new FormCollection { new NameValueCollection { { "EmailMessageInput.Recipient", "[email protected]"}, { "EmailMessageInput.Body", "Test body." } } }; _bindingContext = new ModelBindingContext { ModelName = "EmailMessageInput", ValueProvider = form }; _modelBinder = new DefaultModelBinder(); }; protected static ModelBindingContext _bindingContext; protected static DefaultModelBinder _modelBinder; } public abstract class given_a_controller_context { protected static MessageController _controller; Establish context = () => { _controller = new MessageController(); }; } Finally, my spec throws an null reference exception when I execute .BindModel() from inside one of my specs: Because of = () => { _model = _modelBinder.BindModel(_controller.ControllerContext, _bindingContext); }; Any clue what it could be? Feel free to ask me for more info, if needed. I might have taken something for granted.

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  • Should an event-sourced aggregate root have query access to the event sourcing repository?

    - by JD Courtoy
    I'm working on an event-sourced CQRS implementation, using DDD in the application / domain layer. I have an object model that looks like this: public class Person : AggregateRootBase { private Guid? _bookingId; public Person(Identification identification) { Apply(new PersonCreatedEvent(identification)); } public Booking CreateBooking() { // Enforce Person invariants var booking = new Booking(); Apply(new PersonBookedEvent(booking.Id)); return booking; } public void Release() { // Enforce Person invariants // Should we load the booking here from the aggregate repository? // We need to ensure that booking is released as well. var booking = BookingRepository.Load(_bookingId); booking.Release(); Apply(new PersonReleasedEvent(_bookingId)); } [EventHandler] public void Handle(PersonBookedEvent @event) { _bookingId = @event.BookingId; } [EventHandler] public void Handle(PersonReleasedEvent @event) { _bookingId = null; } } public class Booking : AggregateRootBase { private DateTime _bookingDate; private DateTime? _releaseDate; public Booking() { //Enforce invariants Apply(new BookingCreatedEvent()); } public void Release() { //Enforce invariants Apply(new BookingReleasedEvent()); } [EventHandler] public void Handle(BookingCreatedEvent @event) { _bookingDate = SystemTime.Now(); } [EventHandler] public void Handle(BookingReleasedEvent @event) { _releaseDate = SystemTime.Now(); } // Some other business activities unrelated to a person } With my understanding of DDD so far, both Person and Booking are seperate aggregate roots for two reasons: There are times when business components will pull Booking objects separately from the database. (ie, a person that has been released has a previous booking modified due to incorrect information). There should not be locking contention between Person and Booking whenever a Booking needs to be updated. One other business requirement is that a Booking can never occur for a Person more than once at a time. Due to this, I'm concerned about querying the query database on the read side as there could potentially be some inconsistency there (due to using CQRS and having an eventually consistent read database). Should the aggregate roots be allowed to query the event-sourced backing store for objects (lazy-loading them as needed)? Are there any other avenues of implementation that would make more sense?

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  • Setting Background of a Jbutton

    - by mithun1538
    Hello there, I have 5 JButtons: b1, b2, b3, b4, b5. By default, their color is gray. When I click on any button, the background of that button changes to white. When I click another button, I want that previous clicked button to change its background to gray, and this newly clicked button to change its background to white. Here is the code that I wrote: int liveButton = 0; //holds the value of the button that is last clicked. //0 indicates no button clicked (in the beginning) private void ChangeInUsersList(int clickedButton) { switch(liveButton) { case 1 : b1.setBackground(Color.GRAY); break; case 2 : b2.setBackground(Color.GRAY); break; case 3 : b3.setBackground(Color.GRAY); break; case 4 : b4.setBackground(Color.GRAY); break; case 5 : b5.setBackground(Color.GRAY); break; default: System.out.println("No button to change"); } liveButton = clickedButton;// store the clicked button to change its //background later } private void b1ActionPerformed(java.awt.event.ActionEvent evt) { ChangeInUsersList(1); b1.setBackground(new java.awt.Color(255,255,255)); } private void b2ActionPerformed(java.awt.event.ActionEvent evt) { ChangeInUsersList(2); b2.setBackground(new java.awt.Color(255,255,255)); } private void b3ActionPerformed(java.awt.event.ActionEvent evt) { ChangeInUsersList(3); b3.setBackground(new java.awt.Color(255,255,255)); } private void b4ActionPerformed(java.awt.event.ActionEvent evt) { ChangeInUsersList(4); b4.setBackground(new java.awt.Color(255,255,255)); } private void b5ButtonActionPerformed(java.awt.event.ActionEvent evt) { ChangeInUsersList(5); b5.setBackground(new java.awt.Color(255,255,255)); } However, its not working as expected. When i click on a button, its background does change to white. However, if i click on some other button after that, the former button's background doesnt change to grey. I tried replacing Color.GREY with new java.awt.Color(236,233,216) - the rgb for grey but it still doesnt work.

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  • saxon java xpath exception :

    - by changed
    Hi I am trying to read XPath queries from a file and run it against a xml data file. I am doing it through Saxon Xpath processor. But i keep getting this error. Code i am using is from sample code provided with the library. Error i am getting is : Exception in thread "main" javax.xml.xpath.XPathExpressionException: Supplied node must be built using the same or a compatible Configuration at net.sf.saxon.xpath.XPathExpressionImpl.evaluate(XPathExpressionImpl.java:283) at net.sf.saxon.xpath.XPathExpressionImpl.evaluate(XPathExpressionImpl.java:375) at edu.xml.XPathExample.go(XPathExample.java:81) at edu.xml.XPathExample.main(XPathExample.java:42) - public void go(String filename) throws Exception { XPathExpression findLine = null; String readLine = null; Object document = new XPathEvaluator().setSource(new StreamSource(new File(dataPath))); System.setProperty("javax.xml.xpath.XPathFactory:" + NamespaceConstant.OBJECT_MODEL_SAXON, "net.sf.saxon.xpath.XPathFactoryImpl"); XPathFactory xpf = XPathFactory.newInstance(NamespaceConstant.OBJECT_MODEL_SAXON); XPath xpe = xpf.newXPath(); if (filename != null) { this.queryPath = filename; } try { fileReader = new BufferedReader(new FileReader(queryPath)); } catch (FileNotFoundException ex) { System.out.println("File not found: " + ex.getMessage()); } xpe.setXPathVariableResolver(this); while (true) { try { readLine = fileReader.readLine(); } catch (IOException ex) { System.out.println("Error while reading file: " + ex.getMessage()); } if (readLine == null) { break; } findLine = xpe.compile(readLine); String resultString = findLine.evaluate(document); System.out.println("<output>"); System.out.println("String Value => " + resultString); System.out.println("</output>"); } }

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  • constructor in Perl with an array(OOPS)

    - by superstar
    whats the difference between these two 'new' constructors in perl? 1) sub new { my $class = shift; my $self = {}; $self->{firstName} = undef; $self->{lastName} = undef; $self->{PEERS} = []; bless ($self, $class); return $self; } 2) sub new { my $class = shift; my $self = { _firstName => shift, _lastName => shift, _ssn => shift, }; bless $self, $class; return $self; } I am using the 2nd one so far, but i need to implement the arrays in perl? can you suggest a way to do it with the 2nd 'new' constructor

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  • Objective C: Create arrays from first array based on value

    - by Nic Hubbard
    I have an array of strings that are comma separated such as: Steve Jobs,12,CA Fake Name,21,CA Test Name,22,CA Bill Gates,44,WA Bill Nye,21,OR I have those values in an NSScanner object so that I can loop through the values and get each comma seperated value using objectAtIndex. So, what I would like to do, is group the array items into new arrays, based on a value, in this case, State. So, from those, I need to loop through, checking which state they are in, and push those into a new array, one array per state. CA Array: Steve Jobs,12,CA Fake Name,21,CA Test Name,22,CA WA Array: Bill Gates,44,WA OR Array: Bill Nye,21,OR So in the end, I would have 3 new arrays, one for each state. Also, if there were additional states used in the first array, those should have new arrays created also. Any help would be appreciated!

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  • Office Communicator Auto Accept Calls with C# API

    - by Dennis
    Is there a way to automatically accept calls programmed with the C# Api when someone calls 'me' to start a video call? Starting a video call with the API is easy: var contactArray = new ArrayList(); contactArray.Add("[email protected]"); object[] sipUris = new object[contactArray.Count]; int currentObject = 0; foreach (object contactObject in contactArray) { sipUris[currentObject] = contactObject; currentObject++; } var communicator = new Messenger(); communicator.OnIMWindowCreated += new DMessengerEvents_OnIMWindowCreatedEventHandler(communicator_OnIMWindowCreated); IMessengerAdvanced msgrAdv = communicator as CommunicatorAPI.IMessengerAdvanced; if (msgrAdv != null) { try { object obj = msgrAdv.StartConversation(CommunicatorAPI.CONVERSATION_TYPE.CONVERSATION_TYPE_VIDEO, sipUris, null, "Conference Wall CZ - Conversation", "1", null); } catch (COMException ex) { Console.WriteLine(ex.Message); } } But on the other side i want to automatically accept this call....

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