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  • hibernate update JPA foregin key

    - by cometta
    my jpa look like below public class TESTClass implements Serializable { ... private String name; @EmbeddedId protected IssTESTPK issTESTPK; @JoinColumns({@JoinColumn(name = "DIVISION_CODE", referencedColumnName = "DIVISION_CODE", nullable = false , insertable = false, updatable = false), @JoinColumn(name = "SURVEY_NUM", referencedColumnName = "SURVEY_NUM", nullable = false, insertable = false, updatable = false)}) @ManyToOne(optional = false) private IssDivision issDivision; } if i make change to 'name' and call merge, it able to update into database, but when i change issDivision, and call merge, it doesnt update database. how to solve this? does it related to because i'm using embededId (composite primary keys) ?

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  • Can I access Spring session-scoped beans from application-scoped beans? How?

    - by Corvus
    I'm trying to make this 2-player web game application using Spring MVC. I have session-scoped beans Player and application-scoped bean GameList, which creates and stores Game instances and passes them to Players. On player creates a game and gets its ID from GameList and other player sends ID to GameList and gets Game instance. The Game instance has its players as attributes. Problem is that each player sees only himself instead of the other one. Example of what each player sees: First player (Alice) creates a game: Creator: Alice, Joiner: Empty Second player (Bob) joins the game: Creator: Bob, Joiner: Bob First player refreshes her browser Creator: Alice, Joiner: Alice What I want them to see is Creator: Alice, Joiner: Bob. Easy way to achieve this is saving information about players instead of references to players, but the game object needs to call methods on its player objects, so this is not a solution. I think it's because of aop:scoped-proxy of session-scoped Player bean. If I understand this, the Game object has reference to proxy, which refers to Player object of current session. Can Game instance save/access the other Player objects somehow? beans in dispatcher-servlet.xml: <bean id="userDao" class="authorization.UserDaoFakeImpl" /> <bean id="gameList" class="model.GameList" /> <bean name="/init/*" class="controller.InitController" > <property name="gameList" ref="gameList" /> <property name="game" ref="game" /> <property name="player" ref="player" /> </bean> <bean id="game" class="model.GameContainer" scope="session"> <aop:scoped-proxy/> </bean> <bean id="player" class="beans.Player" scope="session"> <aop:scoped-proxy/> </bean> methods in controller.InitController private GameList gameList; private GameContainer game; private Player player; public ModelAndView create(HttpServletRequest request, HttpServletResponse response) throws Exception { game.setGame(gameList.create(player)); return new ModelAndView("redirect:game"); } public ModelAndView join(HttpServletRequest request, HttpServletResponse response, GameId gameId) throws Exception { game.setGame(gameList.join(player, gameId.getId())); return new ModelAndView("redirect:game"); } called methods in model.gameList public Game create(Player creator) { Integer code = generateCode(); Game game = new Game(creator, code); games.put(code, game); return game; } public Game join(Player joiner, Integer code) { Game game = games.get(code); if (game!=null) { game.setJoiner(joiner); } return game; }

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  • Cannot load JRubyEngine because org.apache.bsf.util.BSFEngineImpl not found

    - by Ceilingfish
    Hi, I'm trying to use JRuby in a custom application, and I don't seem to be able to load the JRubyEngine object. My class looks like functionally similar to this: public class ScriptEngine { private static ScriptEngine engine = new JRubyEngine(); public void run(final String script, final Map<String,Object> input) { final Bindings context = engine.createBindings(); context.putAll(input); try { engine.eval(script,context); } catch (ScriptException e) { log.error("Failed to execute script: "+getScript(),e); } } } However this fails at compilation with the complaint: [javac] Compiling 486 source files to /workspace/myProject/build/src [javac] /workspace/myProject/src/net/ceilingfish/ScriptEngine.java:31: cannot access org.apache.bsf.util.BSFEngineImpl [javac] class file for org.apache.bsf.util.BSFEngineImpl not found [javac] private static ScriptEngine engine = new JRubyEngine(); [javac] ^ [javac] 1 error Does anyone have any insights on where I can get this class from? Or if there is a better way to be instantiating a JRubyEngine object.

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  • How to call base abstract or interface from DAL into BLL?

    - by programmerist
    How can i access abstract class in BLL ? i shouldn't see GenAccessor in BLL it must be private class GenAccessor . i should access Save method over _AccessorForSQL. ok? MY BLL cs: public class AccessorForSQL: GenoTip.DAL._AccessorForSQL { public bool Save(string Name, string SurName, string Adress) { ListDictionary ld = new ListDictionary(); ld.Add("@Name", Name); ld.Add("@SurName", SurName); ld.Add("@Adress", Adress); return **base.Save("sp_InsertCustomers", ld, CommandType.StoredProcedure);** } } i can not access base.Save....???????? it is my DAL Layer: namespace GenoTip.DAL { public abstract class _AccessorForSQL { public abstract bool Save(string sp, ListDictionary ld, CommandType cmdType); public abstract bool Update(); public abstract bool Delete(); public abstract DataSet Select(); } private class GenAccessor : _AccessorForSQL { DataSet ds; DataTable dt; public override bool Save(string sp, ListDictionary ld, CommandType cmdType) { SqlConnection con = null; SqlCommand cmd = null; SqlDataReader dr = null; try { con = GetConnection(); cmd = new SqlCommand(sp, con); con.Open(); cmd.CommandType = cmdType; foreach (string ky in ld.Keys) { cmd.Parameters.AddWithValue(ky, ld[ky]); } dr = cmd.ExecuteReader(); ds = new DataSet(); dt = new DataTable(); ds.Tables.Add(dt); ds.Load(dr, LoadOption.OverwriteChanges, dt); } catch (Exception exp) { HttpContext.Current.Trace.Warn("Error in GetCustomerByID()", exp.Message, exp); } finally { if (dr != null) dr.Close(); if (con != null) con.Close(); } return (ds.Tables[0].Rows.Count 0) ? true : false; } public override bool Update() { return true; } public override bool Delete() { return true; } public override DataSet Select() { DataSet dst = new DataSet(); return dst; } private static SqlConnection GetConnection() { string connStr = WebConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString; SqlConnection conn = new SqlConnection(connStr); return conn; }

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  • Unable to send email using 3rd party server ( IIS 7, Windows Server 2008, ASP.NET )

    - by Reed
    Hello All, I am using IIS 7 on Server 2008. I just tried migrating my app from an older platform - everything works fine, except the email feature. This is my config: < mailSettings > < smtp from="[email protected]" deliveryMethod="Network" > < network host="mail.xyz.com" port="25" userName="[email protected]" password="123" /> < / smtp > < /mailSettings > Whenever I need to send an email I use: SmtpClient smtp = new SmtpClient(); smtp.Send(email); The funny thing is I get absolutely no errors, however the email is never sent. The outbound firewall ruleset allows SMTP traffic. Any idea what I did wrong?

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  • How to set the skin of a DotNetNuke page through code?

    - by ks78
    I'm working on a DNN module that creates DNN pages (tabs) and places DNN modules on them through code. So, far that's working very well. However, I'd like it to also be able to programmatically set the page's skin and place the modules in the appropriate pane. Does anyone know how to do this using code? Solution: I set SkinSrc and ContainerSrc as mika suggested. Here's my source, if you're interested. This is where I set SkinSrc. ''' <summary>Create new DNN tab/page.</summary> Private Function CreatePage(ByVal ParentID As Integer, ByVal PageName As String, ByVal PageTitle As String, ByVal Description As String, ByVal Keywords As String, ByVal Permissions As TabPermissionCollection, Optional ByVal SkinSrc As String = "", Optional ByVal isVisible As Boolean = True, Optional ByVal LoadDefaultModules As Boolean = True) As Tabs.TabInfo Try Dim tabCtrlr As New TabController Dim newTab As New Tabs.TabInfo Dim newPermissions As TabPermissionCollection = newTab.TabPermissions Dim permissionProvider As PermissionProvider = permissionProvider.Instance Dim infPermission As TabPermissionInfo ' set new page properties newTab.PortalID = PortalId newTab.TabName = PageName newTab.Title = PageTitle newTab.Description = Description newTab.KeyWords = Keywords newTab.IsDeleted = False newTab.IsSuperTab = False newTab.IsVisible = isVisible newTab.DisableLink = False newTab.IconFile = "" newTab.Url = "" newTab.ParentId = ParentID 'add skinsrc if specified If (SkinSrc.Length > 0) Then newTab.SkinSrc = SkinSrc ' create new page tabCtrlr.AddTab(newTab, LoadDefaultModules) ' copy permissions selected in Permissions collection For index As Integer = 0 To (Permissions.Count - 1) infPermission = New TabPermissionInfo infPermission.AllowAccess = Permissions(index).AllowAccess infPermission.RoleID = Permissions(index).RoleID infPermission.RoleName = Permissions(index).RoleName infPermission.TabID = Permissions(index).TabID infPermission.PermissionID = Permissions(index).PermissionID 'save permission info newPermissions.Add(infPermission, True) permissionProvider.SaveTabPermissions(newTab) Next index 'return TabInfo of new page Return newTab Catch ex As Exception 'failure Return New Tabs.TabInfo End Try End Function These next two functions were taken from the DNN source and tweaked slightly, so I can't take credit for much of them. Also, if you use these in your own modules there could be issues when upgrading DNN. Although the upgrade from 5.05 to 5.06 went smoothly for me. In the AddNewModule function, I used ContainerSrc to specify the custom container to use. PaneName is the property used to specify which panel the module should be placed in. #Region "From DNN Source --mostly" #Region "Enums" Private Enum ViewPermissionType View = 0 Edit = 1 End Enum #End Region ''' ----------------------------------------------------------------------------- ''' <summary>Adds a New Module to a Pane</summary> ''' <param name="align">The alignment for the Module</param> ''' <param name="desktopModuleId">The Id of the DesktopModule</param> ''' <param name="permissionType">The View Permission Type for the Module</param> ''' <param name="title">The Title for the resulting module</param> ''' <param name="paneName">The pane to add the module to</param> ''' <param name="position">The relative position within the pane for the module</param> ''' ----------------------------------------------------------------------------- Private Function AddNewModule(ByVal TabID As Integer, ByVal title As String, ByVal desktopModuleId As Integer, ByVal paneName As String, ByVal position As Integer, ByVal permissionType As ViewPermissionType, ByVal align As String) As Integer Dim objTabController As New TabController Dim objTabPermissions As TabPermissionCollection = objTabController.GetTab(TabID, PortalId, True).TabPermissions Dim objPermissionController As New PermissionController Dim objModules As New ModuleController Dim objModuleDefinition As ModuleDefinitionInfo Dim objEventLog As New Services.Log.EventLog.EventLogController Dim newModuleID As Integer Dim j As Integer Try Dim desktopModule As DesktopModuleInfo = Nothing If Not DesktopModuleController.GetDesktopModules(PortalSettings.PortalId).TryGetValue(desktopModuleId, desktopModule) Then Throw New ArgumentException("desktopModuleId") End If Catch ex As Exception LogException(ex) End Try Dim UserId As Integer = -1 If Request.IsAuthenticated Then Dim objUserInfo As Users.UserInfo = UserController.GetCurrentUserInfo UserId = objUserInfo.UserID End If For Each objModuleDefinition In ModuleDefinitionController.GetModuleDefinitionsByDesktopModuleID(desktopModuleId).Values Dim objModule As New ModuleInfo objModule.Initialize(PortalSettings.PortalId) objModule.PortalID = PortalSettings.PortalId objModule.TabID = TabID objModule.ModuleOrder = position If title = "" Then objModule.ModuleTitle = objModuleDefinition.FriendlyName Else objModule.ModuleTitle = title End If objModule.PaneName = paneName objModule.ModuleDefID = objModuleDefinition.ModuleDefID If objModuleDefinition.DefaultCacheTime > 0 Then objModule.CacheTime = objModuleDefinition.DefaultCacheTime If Portals.PortalSettings.Current.DefaultModuleId > Null.NullInteger AndAlso Portals.PortalSettings.Current.DefaultTabId > Null.NullInteger Then Dim defaultModule As ModuleInfo = objModules.GetModule(Portals.PortalSettings.Current.DefaultModuleId, Portals.PortalSettings.Current.DefaultTabId, True) If Not defaultModule Is Nothing Then objModule.CacheTime = defaultModule.CacheTime End If End If End If Select Case permissionType Case ViewPermissionType.View objModule.InheritViewPermissions = True Case ViewPermissionType.Edit objModule.InheritViewPermissions = False End Select ' get the default module view permissions Dim arrSystemModuleViewPermissions As ArrayList = objPermissionController.GetPermissionByCodeAndKey("SYSTEM_MODULE_DEFINITION", "VIEW") ' get the permissions from the page For Each objTabPermission As TabPermissionInfo In objTabPermissions If objTabPermission.PermissionKey = "VIEW" AndAlso permissionType = ViewPermissionType.View Then 'Don't need to explicitly add View permisisons if "Same As Page" Continue For End If ' get the system module permissions for the permissionkey Dim arrSystemModulePermissions As ArrayList = objPermissionController.GetPermissionByCodeAndKey("SYSTEM_MODULE_DEFINITION", objTabPermission.PermissionKey) ' loop through the system module permissions For j = 0 To arrSystemModulePermissions.Count - 1 ' create the module permission Dim objSystemModulePermission As PermissionInfo objSystemModulePermission = CType(arrSystemModulePermissions(j), PermissionInfo) If objSystemModulePermission.PermissionKey = "VIEW" AndAlso permissionType = ViewPermissionType.Edit AndAlso _ objTabPermission.PermissionKey <> "EDIT" Then 'Only Page Editors get View permissions if "Page Editors Only" Continue For End If Dim objModulePermission As ModulePermissionInfo = AddModulePermission(objModule, _ objSystemModulePermission, _ objTabPermission.RoleID, objTabPermission.UserID, _ objTabPermission.AllowAccess) ' ensure that every EDIT permission which allows access also provides VIEW permission If objModulePermission.PermissionKey = "EDIT" And objModulePermission.AllowAccess Then Dim objModuleViewperm As ModulePermissionInfo = AddModulePermission(objModule, _ CType(arrSystemModuleViewPermissions(0), PermissionInfo), _ objModulePermission.RoleID, objModulePermission.UserID, _ True) End If Next 'Get the custom Module Permissions, Assume that roles with Edit Tab Permissions 'are automatically assigned to the Custom Module Permissions If objTabPermission.PermissionKey = "EDIT" Then Dim arrCustomModulePermissions As ArrayList = objPermissionController.GetPermissionsByModuleDefID(objModule.ModuleDefID) ' loop through the custom module permissions For j = 0 To arrCustomModulePermissions.Count - 1 ' create the module permission Dim objCustomModulePermission As PermissionInfo objCustomModulePermission = CType(arrCustomModulePermissions(j), PermissionInfo) AddModulePermission(objModule, objCustomModulePermission, _ objTabPermission.RoleID, objTabPermission.UserID, _ objTabPermission.AllowAccess) Next End If Next objModule.AllTabs = False objModule.Alignment = align 'apply Custom Container to module objModule.ContainerSrc = CONTAINER_TRANSPARENT_PLAIN newModuleID = objModules.AddModule(objModule) Next Return newModuleID End Function ''' ----------------------------------------------------------------------------- ''' <summary>Adds a Module Permission</summary> ''' <param name="permission">The permission to add</param> ''' <param name="roleId">The Id of the role to add the permission for.</param> ''' ----------------------------------------------------------------------------- Private Function AddModulePermission(ByVal objModule As ModuleInfo, ByVal permission As PermissionInfo, ByVal roleId As Integer, ByVal userId As Integer, ByVal allowAccess As Boolean) As ModulePermissionInfo Dim objModulePermission As New ModulePermissionInfo objModulePermission.ModuleID = objModule.ModuleID objModulePermission.PermissionID = permission.PermissionID objModulePermission.RoleID = roleId objModulePermission.UserID = userId objModulePermission.PermissionKey = permission.PermissionKey objModulePermission.AllowAccess = allowAccess ' add the permission to the collection If Not objModule.ModulePermissions.Contains(objModulePermission) Then objModule.ModulePermissions.Add(objModulePermission) End If Return objModulePermission End Function #End Region

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  • wpf c# media player questions

    - by Sankar
    I'm making a media player in wpf using c#. I had 3 questions. 1) I tried making a seeker XAML: <Slider Name="timelineSlider" Margin="40,91,26,0" ValueChanged="SeekToMediaPosition" Height="32" VerticalAlignment="Top" /> Code: private void Element_MediaOpened(object sender, EventArgs e) { timelineSlider.Maximum = ply.NaturalDuration.TimeSpan.TotalMilliseconds; } private void SeekToMediaPosition(object sender, RoutedPropertyChangedEventArgs<double> e) { int SliderValue = (int)timelineSlider.Value; TimeSpan ts = new TimeSpan(SliderValue, SliderValue, SliderValue, SliderValue, SliderValue); ply.Position = ts; } When I run the program, I open the mp3 and play it but the seeker won't move. When I click on the seeker to move it to a certain position, the song stops playing but the seeker moves. What's the problem and how do I fix it? How do I create a volume increase/decrease bar? How can I open several mp3s and queue them up like a playlist? Thank you

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  • Storing Configurations into Active Direcotry Application Mode

    - by Khurram Aziz
    I have a network devices polling and do actions kind of app; currently it keeps the configuration (which devices to poll, what kind of device, ip, login, password etc) in the database. My network administrator wants that this information is stored in some LDAP server so that he maintain single store of configuration which he himself can use in other apps/scripts etc. I am looking for some article that walks me through setting up ADAM/AD LDS for storing configuration by authoring custom schema etc and how to setup some authentication infrastructure to protect the data.

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  • Solved::MessageQueue.BeginReceive() null ref error - c#

    - by ltech
    Have a windows service that listens to a msmq. In the OnStart method is have this protected override void OnStart(string[] args) { try { _queue = new MessageQueue(_qPath);//this part works as i had logging before and afer this call //Add MSMQ Event _queue.ReceiveCompleted += new ReceiveCompletedEventHandler(queue_ReceiveCompleted);//this part works as i had logging before and afer this call _queue.BeginReceive();//This is where it is failing - get a null reference exception } catch(Exception ex) { EventLogger.LogEvent(EventSource, EventLogType, "OnStart" + _lineFeed + ex.InnerException.ToString() + _lineFeed + ex.Message.ToString()); } } where private MessageQueue _queue = null; This works on my machine but when deployed to a windows 2003 server and running as Network service account, it fails Exception recvd: Service cannot be started. System.NullReferenceException: Object reference not set to an instance of an object. at MYService.Service.OnStart(String[] args) at System.ServiceProcess.ServiceBase.ServiceQueuedMainCallback(Object state) Solved: Turned out that the Q that i set up, I had to explicitly add Network Service account to it under security tab

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  • Corporate Wiki Organization - Technical Documentation

    - by Dave Jarvis
    Corporations have documents describing various aspects of their technical systems, including: Custom Applications Custom Development Frameworks Third Party Applications Accounting Bug Tracking Network Management How To Guides User Manuals Software Tools Web Browsers Development IDEs Graphics GIMP xv Text Editing File Transfer ncFTP WinSCP Hardware Servers Web Database Exchange File Network Devices Printers What other items are missing from the list, and how would you organize it? (For example, would Software Tools make more sense under Third Party Applications?) Try to think about where you, a software developer, would expect to find the information by browsing (not searching). A few constraints: The structure should not go beyond three levels deep. Avoid the word "and" in favour of two different categories. Keep the structure general: it should appy as broadly as possible. Target audience is primarily technical.

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  • .NET Impersonate not working!

    - by Jagd
    I have a webpage that allows a user to upload a file to a network share. When I run the webpage locally (within VS 2008) and try to upload the file, it works! However, when I deploy the website to the webserver and try to upload the file through the webpage, it doesn't work! The error being returned to me on the webserver says "Access to the path '\05prd1\emp\test.txt' is denied. So, obviously, this is a permissions issue. The network share is configured to allow full access both to me (NT authentication) and to the NETWORK SERVICE (which is .NET's default account and what we have set in our IIS application pool as the default user for this website). I have tried this with and without authentication, and neither one works on the webserver, yet both ways works on my local machine. The code that does the file upload is below. Please note that the code below includes impersonation, but like I said above, I've tried it with and without impersonation and it's made no difference. if (fuCourses.PostedFile != null && fuCourses.PostedFile.ContentLength > 0) { System.Security.Principal.WindowsImpersonationContext impCtx; impCtx = ((System.Security.Principal.WindowsIdentity)User.Identity).Impersonate(); try { lblMsg.Visible = true; // The courses file to be uploaded HttpPostedFile file = fuCourses.PostedFile; string fName = file.FileName; string uploadPath = "\\\\05prd1\\emp\\"; // Get the file name if (fName.Contains("\\")) { fName = fName.Substring( fName.LastIndexOf("\\") + 1); } // Delete the courses file if it is already on \\05prd1\emp FileInfo fi = new FileInfo(uploadPath + fName); if (fi != null && fi.Exists) { fi.Delete(); } // Open new file stream on \\05prd1\emp and read bytes into it from file upload FileStream fs = File.Create(uploadPath + fName, file.ContentLength); using (Stream stream = file.InputStream) { byte[] b = new byte[4096]; int read; while ((read = stream.Read(b, 0, b.Length)) > 0) { fs.Write(b, 0, read); } } fs.Close(); lblMsg.Text = "File Successfully Uploaded"; lblMsg.ForeColor = System.Drawing.Color.Green; } catch (Exception ex) { lblMsg.Text = ex.Message; lblMsg.ForeColor = System.Drawing.Color.Red; } finally { impCtx.Undo(); } } Any help on this would be very appreciated!

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  • How to pass ctor args in Activator.CreateInstance?

    - by thames
    I need a performance enhanced Activator.CreateInstance() and came across this article by Miron Abramson that uses a factory to create the instance in IL and then cache it. (I've included code below from Miron Abramson's site in case it somehow disappears). I'm new to IL Emit code and anything beyond Activator.CreateInstance() for instantiating a class and any help would be much appreciative. My problem is that I need to create an instance of an object that takes a ctor with a parameter. I see there is a way to pass in the Type of the parameter, but is there a way to pass in the value of the ctor parameter as well? If possible, I would like to use a method similar to CreateObjectFactory<T>(params object[] constructorParams) as some objects I want to instantiate may have more than 1 ctor param. // Source: http://mironabramson.com/blog/post/2008/08/Fast-version-of-the-ActivatorCreateInstance-method-using-IL.aspx public static class FastObjectFactory { private static readonly Hashtable creatorCache = Hashtable.Synchronized(new Hashtable()); private readonly static Type coType = typeof(CreateObject); public delegate object CreateObject(); /// /// Create an object that will used as a 'factory' to the specified type T /// public static CreateObject CreateObjectFactory() where T : class { Type t = typeof(T); FastObjectFactory.CreateObject c = creatorCache[t] as FastObjectFactory.CreateObject; if (c == null) { lock (creatorCache.SyncRoot) { c = creatorCache[t] as FastObjectFactory.CreateObject; if (c != null) { return c; } DynamicMethod dynMethod = new DynamicMethod("DM$OBJ_FACTORY_" + t.Name, typeof(object), null, t); ILGenerator ilGen = dynMethod.GetILGenerator(); ilGen.Emit(OpCodes.Newobj, t.GetConstructor(Type.EmptyTypes)); ilGen.Emit(OpCodes.Ret); c = (CreateObject)dynMethod.CreateDelegate(coType); creatorCache.Add(t, c); } } return c; } } Update to Miron's code from commentor on his post 2010-01-11 public static class FastObjectFactory2<T> where T : class, new() { public static Func<T> CreateObject { get; private set; } static FastObjectFactory2() { Type objType = typeof(T); var dynMethod = new DynamicMethod("DM$OBJ_FACTORY_" + objType.Name, objType, null, objType); ILGenerator ilGen = dynMethod.GetILGenerator(); ilGen.Emit(OpCodes.Newobj, objType.GetConstructor(Type.EmptyTypes)); ilGen.Emit(OpCodes.Ret); CreateObject = (Func<T>) dynMethod.CreateDelegate(typeof(Func<T>)); } }

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  • How is IObservable<double>.Average supposed to work?

    - by Dan Tao
    Update Looks like Jon Skeet was right (big surprise!) and the issue was with my assumption about the Average extension providing a continuous average (it doesn't). For the behavior I'm after, I wrote a simple ContinuousAverage extension method, the implementation of which I am including here for the benefit of others who may want something similar: public static class ObservableExtensions { private class ContinuousAverager { private double _mean; private long _count; public ContinuousAverager() { _mean = 0.0; _count = 0L; } // undecided whether this method needs to be made thread-safe or not // seems that ought to be the responsibility of the IObservable (?) public double Add(double value) { double delta = value - _mean; _mean += (delta / (double)(++_count)); return _mean; } } public static IObservable<double> ContinousAverage(this IObservable<double> source) { var averager = new ContinuousAverager(); return source.Select(x => averager.Add(x)); } } I'm thinking of going ahead and doing something like the above for the other obvious candidates as well -- so, ContinuousCount, ContinuousSum, ContinuousMin, ContinuousMax ... perhaps ContinuousVariance and ContinuousStandardDeviation as well? Any thoughts on that? Original Question I use Rx Extensions a little bit here and there, and feel I've got the basic ideas down. Now here's something odd: I was under the impression that if I wrote this: var ticks = Observable.FromEvent<QuoteEventArgs>(MarketDataProvider, "MarketTick"); var bids = ticks .Where(e => e.EventArgs.Quote.HasBid) .Select(e => e.EventArgs.Quote.Bid); var bidsSubscription = bids.Subscribe( b => Console.WriteLine("Bid: {0}", b) ); var avgOfBids = bids.Average(); var avgOfBidsSubscription = avgOfBids.Subscribe( b => Console.WriteLine("Avg Bid: {0}", b) ); I would get two IObservable<double> objects (bids and avgOfBids); one would basically be a stream of all the market bids from my MarketDataProvider, the other would be a stream of the average of these bids. So something like this: Bid Avg Bid 1 1 2 1.5 1 1.33 2 1.5 It seems that my avgOfBids object isn't doing anything. What am I missing? I think I've probably misunderstood what Average is actually supposed to do. (This also seems to be the case for all of the aggregate-like extension methods on IObservable<T> -- e.g., Max, Count, etc.)

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  • WP7 silverlight custom control using popup

    - by Miloud B.
    Hi guys, I'm creating a custom datepicker, I have a textbox, once clicked it opens a calendar within a popup. What I want to do is change the size of the popup so it shows my whole calendar, but I can't manage to change it..., I've tried using Height, Width, MinHeight, MinWidth... but it doesn't work, the popup keep showing with a fixed size. The thing is that my popup's parent property isn't evaluated since it has expression issues (according to debugger), so I'm sure my popup's parent isn't the main screen( say layout grid). How can I for example make my popup open within a specific context ? This part of my code isn't XAML, it's C# code only and it looks like: using System; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Ink; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; using System.Windows.Controls.Primitives; namespace CalendarBranch.components { public class wpDatePicker:TextBox { private CalendarPopup calendar; private Popup popup; public wpDatePicker() { this.calendar = new CalendarPopup(); this.popup = new Popup(); this.popup.Child = this.calendar; this.popup.Margin = new Thickness(0); this.MouseLeftButtonUp += new MouseButtonEventHandler(wpDatePicker_MouseLeftButtonUp); this.calendar.onDateSelect += new EventHandler(onDateSelected); this.IsReadOnly = true; } protected void wpDatePicker_MouseLeftButtonUp(object sender, MouseButtonEventArgs e) { this.popup.Height = this.calendar.Height; this.popup.Width = this.calendar.Width; this.popup.HorizontalAlignment = HorizontalAlignment.Center; this.popup.VerticalAlignment = VerticalAlignment.Center; this.popup.HorizontalOffset = 0; this.popup.VerticalOffset = 0; this.popup.MinHeight = this.calendar.Height; this.popup.MinWidth = this.calendar.Width; this.popup.IsOpen = true; } private void onDateSelected(Object sender, EventArgs ea) { this.Text = this.calendar.SelectedValue.ToShortDateString(); this.popup.IsOpen = false; } } } PS: the class Calendar is simply a UserControl that contains a grid with multiple columns, HyperLinkButtons and TextBlocks, so nothing special. Thank you in advance guys ;) Cheers Miloud B.

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  • VB.net Net after load event?

    - by themaninthesuitcase
    I need some way of knowing when a form has finished loading. My reasoning is I have a 2nd form that is loaded when this form loads. The code for this is called from form1.load. Form2 is currently being displayed behind form1 as I am guessing form1 calls an activate or similar at the end of the load so any Activate, BringToFront etc calls on from2 are over ridden. If you look at the code below I have tried adding frmAllocationSearch.Activate, frmAllocationSearch.BringToFront and Me.SendToBack after the call to ShowAlloactionSearchDialog() but these are all wasted as something is happening after the load event is fired to bring Me to the front. Code is: Private Sub Allocation_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load ShowAlloactionSearchDialog() End Sub Private Sub ShowAlloactionSearchDialog() If frmAllocationSearch Is Nothing OrElse frmAllocationSearch.IsDisposed Then frmAllocationSearch = New AllocationSearch frmAllocationSearch.MdiParent = Me.MdiParent frmAllocationSearch.Info = Me.Info frmAllocationSearch.Top = Me.Top frmAllocationSearch.Left = Me.Left + Me.Width - frmAllocationSearch.Width frmAllocationSearch.AllocationWindow = Me frmAllocationSearch.Show() Else If frmAllocationSearch.WindowState = FormWindowState.Minimized Then frmAllocationSearch.WindowState = FormWindowState.Normal frmAllocationSearch.Activate() End If End Sub

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  • Hibernate + Spring : cascade deletion ignoring non-nullable constraints

    - by E.Benoît
    Hello, I seem to be having one weird problem with some Hibernate data classes. In a very specific case, deleting an object should fail due to existing, non-nullable relations - however it does not. The strangest part is that a few other classes related to the same definition behave appropriately. I'm using HSQLDB 1.8.0.10, Hibernate 3.5.0 (final) and Spring 3.0.2. The Hibernate properties are set so that batch updates are disabled. The class whose instances are being deleted is: @Entity( name = "users.Credentials" ) @Table( name = "credentials" , schema = "users" ) public class Credentials extends ModelBase { private static final long serialVersionUID = 1L; /* Some basic fields here */ /** Administrator credentials, if any */ @OneToOne( mappedBy = "credentials" , fetch = FetchType.LAZY ) public AdminCredentials adminCredentials; /** Active account data */ @OneToOne( mappedBy = "credentials" , fetch = FetchType.LAZY ) public Account activeAccount; /* Some more reverse relations here */ } (ModelBase is a class that simply declares a Long field named "id" as being automatically generated) The Account class, which is one for which constraints work, looks like this: @Entity( name = "users.Account" ) @Table( name = "accounts" , schema = "users" ) public class Account extends ModelBase { private static final long serialVersionUID = 1L; /** Credentials the account is linked to */ @OneToOne( optional = false ) @JoinColumn( name = "credentials_id" , referencedColumnName = "id" , nullable = false , updatable = false ) public Credentials credentials; /* Some more fields here */ } And here is the AdminCredentials class, for which the constraints are ignored. @Entity( name = "admin.Credentials" ) @Table( name = "admin_credentials" , schema = "admin" ) public class AdminCredentials extends ModelBase { private static final long serialVersionUID = 1L; /** Credentials linked with an administrative account */ @OneToOne( optional = false ) @JoinColumn( name = "credentials_id" , referencedColumnName = "id" , nullable = false , updatable = false ) public Credentials credentials; /* Some more fields here */ } The code that attempts to delete the Credentials instances is: try { if ( account.validationKey != null ) { this.hTemplate.delete( account.validationKey ); } this.hTemplate.delete( account.languageSetting ); this.hTemplate.delete( account ); } catch ( DataIntegrityViolationException e ) { return false; } Where hTemplate is a HibernateTemplate instance provided by Spring, its flush mode having been set to EAGER. In the conditions shown above, the deletion will fail if there is an Account instance that refers to the Credentials instance being deleted, which is the expected behaviour. However, an AdminCredentials instance will be ignored, the deletion will succeed, leaving an invalid AdminCredentials instance behind (trying to refresh that instance causes an error because the Credentials instance no longer exists). I have tried moving the AdminCredentials table from the admin DB schema to the users DB schema. Strangely enough, a deletion-related error is then triggered, but not in the deletion code - it is triggered at the next query involving the table, seemingly ignoring the flush mode setting. I've been trying to understand this for hours and I must admit I'm just as clueless now as I was then.

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  • linker error in simple program: multiple definition of function

    - by BillyJean
    My function test is added to two different .cpp-files and the functions are private to their respective files as shown below test1.cpp #include <iostream> using namespace std; void test() { cout << "test" << endl; } test2.cpp #include <iostream> using namespace std; void test() { cout << "test" << endl; } main.cpp #include <iostream> using namespace std; int main() { return 0; } During linking I get the error multiple definition of test() - but how is that possible, considering that the two files have their own private scope!? I could understand it if I included the function prototype in each .cpp-files' corresponding header, but there is no such thing in this example.

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  • How do I refactor these two C# functions to abstrtact their logic from the specific class properties

    - by ObligatoryMoniker
    I have two functions whose underlying logic is the same but in one case it sets one property value on a class and in another case it sets a different one. How can I rewrite the following two functions to abstract away as much of the algorithm as possible so that I can make changes in logic in a single place? SetBillingAddress private void SetBillingAddress(OrderAddress newBillingAddress) { BasketHelper basketHelper = new BasketHelper(SiteConstants.BasketName); OrderAddress oldBillingAddress = basketHelper.Basket.Addresses[basketHelper.BillingAddressID]; bool NewBillingAddressIsNotOldBillingAddress = ((oldBillingAddress == null) || (newBillingAddress.OrderAddressId != oldBillingAddress.OrderAddressId)); bool BillingAddressHasBeenPreviouslySet = (oldBillingAddress != null); bool BillingAddressIsNotSameAsShippingAddress = (basketHelper.ShippingAddressID != basketHelper.BillingAddressID); bool NewBillingAddressIsNotShippingAddress = (newBillingAddress.OrderAddressId != basketHelper.ShippingAddressID); if (NewBillingAddressIsNotOldBillingAddress && BillingAddressHasBeenPreviouslySet && BillingAddressIsNotSameAsShippingAddress) { basketHelper.Basket.Addresses.Remove(oldBillingAddress); } if (NewBillingAddressIsNotOldBillingAddress && NewBillingAddressIsNotShippingAddress) { basketHelper.Basket.Addresses.Add(newBillingAddress); } basketHelper.BillingAddressID = newBillingAddress.OrderAddressId; basketHelper.Basket.Save(); } And here is the second one: SetShippingAddress private void SetBillingAddress(OrderAddress newShippingAddress) { BasketHelper basketHelper = new BasketHelper(SiteConstants.BasketName); OrderAddress oldShippingAddress = basketHelper.Basket.Addresses[basketHelper.ShippingAddressID]; bool NewShippingAddressIsNotOldShippingAddress = ((oldShippingAddress == null) || (newShippingAddress.OrderAddressId != oldShippingAddress.OrderAddressId)); bool ShippingAddressHasBeenPreviouslySet = (oldShippingAddress != null); bool ShippingAddressIsNotSameAsBillingAddress = (basketHelper.ShippingAddressID != basketHelper.BillingAddressID); bool NewShippingAddressIsNotBillingAddress = (newShippingAddress.OrderAddressId != basketHelper.BillingAddressID); if (NewShippingAddressIsNotOldShippingAddress && ShippingAddressHasBeenPreviouslySet && ShippingAddressIsNotSameAsBillingAddress) { basketHelper.Basket.Addresses.Remove(oldShippingAddress); } if (NewShippingAddressIsNotOldShippingAddress && NewShippingAddressIsNotBillingAddress) { basketHelper.Basket.Addresses.Add(newShippingAddress); } basketHelper.ShippingAddressID = newShippingAddress.OrderAddressId; basketHelper.Basket.Save(); } My initial thought was that if I could pass a class's property by refernce then I could rewrite the previous functions into something like private void SetPurchaseOrderAddress(OrderAddress newAddress, ref String CurrentChangingAddressIDProperty) and then call this function and pass in either basketHelper.BillingAddressID or basketHelper.ShippingAddressID as CurrentChangingAddressIDProperty but since I can't pass C# properties by reference I am not sure what to do with this code to be able to reuse the logic in both places. Thanks for any insight you can give me.

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  • Careers in Computer Security? [closed]

    - by Joey Green
    I have the opportunity to go back for MSCS and the closest college's main research is in computer security and forensics. I've always been interested in computer networks and security but I have no interest whatsoever to run cables or add users to the network( which is what the network people do where I currently work ). I wanted to know how may I find out the types of day to day task a computer security expert does? I don't mean the jobs you find on dice or indeed. I'm talking about the type of careers that start out at the NSA or DIA. Also, I'm wondering what the pay is like for these types of fields? Thanks to all that reply.

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  • Visual Studio - 'Browse UDDI Servers' -> 404 ?

    - by southof40
    Hi - I have a ASP.Net application which implements a web service. Within the ASP.Net application there's a test script which consumes the web service and it all works etc. I have built a .NET console application and want to 'Add a Web Reference' so that the console app can consume the web service provided by the ASP.NET application. When I use the 'Browse UDDI Servers on the local network' to do that any plausible URL I use results in a 404. I'm guessing I need to do something to my ASP.Net application so that it acts as an UDDI server ? Does anyone know what ? Update I just wanted to clarify something - I'm not desperate to use UDDI it just seems that's the only option in my circumstances which are : I'm actually doing this for another developer who is used to using Visual Studio to do this stuff The other developers system will need to run on another machine within the same network.

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  • How can I limit access to a particular class to one caller at a time in an ASMX web service?

    - by MusiGenesis
    I have a web service method in which I create a particular type of object, use it for a few seconds, and then dispose it. Because of problems arising from multiple threads creating and using instances of this class at the same time, I need to restrict the method so that only one caller at a time ever has one of these objects. To do this, I am creating a private static object: private static object _lock = new object(); ... and then inside the web service method I do this around the critical code: lock (_lock) { using (DangerousObject do = new DangerousObject()) { do.MakeABigMess(); do.CleanItUp(); } } I'm not sure this is working, though. Do I have this right? Will this code ensure that only one instance of DangerousObject is instantiated and in use at a time? Or does each caller get their own copy of _lock, rendering my code here laughable?

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  • Provisioning api jpa

    - by user268515
    Hi i tried the following code Appsprovisioning.java public void calluser() throws AppsForYourDomainExceptiion IOException, { for(UserEntry userEntry : retrieveAllUsers().getEntries()) { m[x]= userEntry.getTitle().getPlainText(); x++; } try { for(int i=0;i<x;i++) { String sd=m[i]; stud greeting1 = new stud(sd); em.persist(greeting1); System.out.println("jk"); } } finally { em.close(); } public UserFeed retrieveAllUsers()throws ,ServiceException, IOException{ userService = new UserService("Myapplication"); userService.setUserCredentials("[email protected]","xxxxxxxx"); URL retrieveUrl = new URL("https://www.google.com/a/feeds/montfortperungudi.edu.in/user/2.0/"); UserFeed allUsers = new UserFeed(); UserFeed currentPage; Link nextLink; do { currentPage = userService.getFeed(retrieveUrl, UserFeed.class); allUsers.getEntries().addAll(currentPage.getEntries()); nextLink = currentPage.getLink(Link.Rel.NEXT, Link.Type.ATOM); if (nextLink != null) { retrieveUrl = new URL(nextLink.getHref()); } } while (nextLink != null); return allUsers; } } Servlet.java public class servlet extends HttpServlet { private static final long serialVersionUID = 1L; private static final Logger log = Logger.getLogger(servlet.class.getName()); // EntityManager em=null; AppsProvisioning aa=new AppsProvisioning(); public void doGet(HttpServletRequest req, HttpServletResponse resp)throws IOException { //em = EMFService.get().createEntityManager(); try { aa.calluser(); }catch(Exception e){ System.out.println("SEF "+e);} finally { // em.clear(); // em.close(); } } } Table Creation import javax.persistence.Entity; import javax.persistence.Id; @Entity(name="stud") public class stud { @Id private String fathername; public stud(String fathername) {// TODO Auto-generated constructor stub this.fathername=fathername; } public void setFathername(String fathername) { this.fathername = fathername; } public String getFathername() { return fathername; } } I cant able to store all the users in the table.. Its returning Session out error.

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  • UIAlertView crashing on undocumented method

    - by morticae
    Our app has been crashing with a frequency of roughly 1 in 1,500 launches due to a bug that is proving elusive. The relevant portion of the stack trace is included. It's being fired as a callback so I have no reference for where it's occurring in my own code. It looks like what's going on is there is a UIViewAnimationState object that is calling UIAlertView's private method (_popoutAnimationDidStop:finished:). Only problem is, it appears the UIAlertView has been dealloced by this point. I don't do anything weird with alert views. I throw them up, and I wait for user input. They are all shown before being released. Anyone encountered this? At this point, I'm leaning toward it being an Apple bug. Thread 0 Crashed: 0 libobjc.A.dylib 0x3138cec0 objc_msgSend + 24 1 UIKit 0x326258c4 -[UIAlertView(Private) _popoutAnimationDidStop:finished:] 2 UIKit 0x324fad70 -[UIViewAnimationState sendDelegateAnimationDidStop:finished:] 3 UIKit 0x324fac08 -[UIViewAnimationState animationDidStop:finished:] 4 QuartzCore 0x311db05c run_animation_cal lbacks

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  • Recursion in Unity and Dispose pattern implementation

    - by Budda
    My class is inherited from UnityContainer (from Unity 2.0), here is source code: public class UnityManager : UnityContainer { private UnityManager() { _context = new MyDataClassesDataContext(); // ... } protected override void Dispose(bool disposing) { if ( disposing ) { _context.Dispose(); } base.Dispose(disposing); } private readonly CMCoreDataClassesDataContext _context; } When Dispose method is called for the instance of UnityManager class it drop into recursion... Why? As far as I know base.Dispose should call the Dispose method of base class only... isn't it? Who call back the Dispose(bool) of UnityManager? How to prevent that? Thanks.

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  • Classes, constructor and pointer class members

    - by pocoa
    I'm a bit confused about the object references. Please check the examples below: class ListHandler { public: ListHandler(vector<int> &list); private: vector<int> list; } ListHandler::ListHandler(vector<int> &list) { this->list = list; } Here I would be wasting memory right? So the right one would be: class ListHandler { public: ListHandler(vector<int>* list); private: vector<int>* list; } ListHandler::ListHandler(vector<int>* list) { this->list = list; } ListHandler::~ListHandler() { delete list; }

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