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  • Multiple .NET processes memory footprint

    - by mr.b
    I am developing an application suite that consists of several applications which user can run as needed (they can run all at the same time, or only several..). My concern is in physical memory footprint of each process, as shown in task manager. I am aware that Framework does memory management behind the curtains in terms that it devotes parts of memory for certain things that are not directly related to my application. The question. Does .NET Framework has some way of minimizing memory footprint of processes it runs when there are several processes running at the same time? (Noobish guess ahead) Like, if System.dll is already loaded by one process, does framework load it for each process, or it has some way of sharing it between processes? I am in no way striving to write as small (resource-wise) apps as possible (if I were, I probably wouldn't be using .NET Framework in the first place), but if there's something I can do something about over-using resources, I'd like to know about it.

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  • Python threads all executing on a single core

    - by Rob Lourens
    I have a Python program that spawns many threads, runs 4 at a time, and each performs an expensive operation. Pseudocode: for object in list: t = Thread(target=process, args=(object)) # if fewer than 4 threads are currently running, t.start(). Otherwise, add t to queue But when the program is run, Activity Monitor in OS X shows that 1 of the 4 logical cores is at 100% and the others are at nearly 0. Obviously I can't force the OS to do anything but I've never had to pay attention to performance in multi-threaded code like this before so I was wondering if I'm just missing or misunderstanding something. Thanks.

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  • Good way to make Authentication and Authorization information available between application layers

    - by DutrowLLC
    I have a web application running on Google App Engine (GAE) for JAVA. I'm authenticating the client at the Servlet layer but would like to make the client information available to my business and data layers without having to pass the client object through the arguments of every single function. I'm considering setting up a "session" type object using ThreadLocal. That way any function can just say something like: CurrentUser.getRoles(); Is this a good way to do this or is there something else that is a more accepted solution? Thanks!

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  • Core Data deleteObject: sets attributes to nil

    - by SG1
    I am implementing an undo/redo mechanism in my app. This works fine for lots of cases. However, I can't undo past deleteObject:. the object is correctly saved in the undo queue, and I get it back and reinsterted into the Core Data stack just fine when calling undo. The problem is that all it's attributes are getting set to nil when I delete it. I have an entity "Canvas" with a to-many relationship called "graphics" to a "Graphic" entity, which has its inverse set to "canvas". Deleting a Graphic, then inserting it back, doesn't work. Here's the code (the redo method is basically the same): - (void)deleteGraphic:(id)aGraphic { //NSLog(@"undo drawing"); //Prepare the undo/redo [self.undoManager beginUndoGrouping]; [self.undoManager setActionName:@"Delete Graphic"]; [[self.detailItem valueForKey:@"graphics"] removeObject:aGraphic]; [[self managedObjectContext] deleteObject:aGraphic]; //End undo/redo [self.undoManager registerUndoWithTarget:self selector:@selector(insertGraphic:) object:aGraphic]; [self.undoManager endUndoGrouping]; NSLog(@"graphics are %@", [self sortedGraphics]); //Update drawing [self.quartzView setNeedsDisplay]; } and here's the wierdness: Before delete: graphics are ( <NSManagedObject: 0x1cc3f0> (entity: Graphic; id: 0x1c05f0 <x-coredata:///Graphic/t840FE8AD-F2E7-4214-822F-7994FF93D4754> ; data: { canvas = 0x162b70 <x-coredata://A919979E-75AD-474D-9561-E0E8F3388718/Canvas/p20>; content = <62706c69 73743030 d4010203 04050609 0a582476 65727369 6f6e5424 746f7059 24617263 68697665 7258246f 626a6563 7473>; frameRect = nil; label = nil; order = 1; path = "(...not nil..)"; traits = "(...not nil..)"; type = Path; }) After redo: graphics are ( <NSManagedObject: 0x1cc3f0> (entity: Graphic; id: 0x1c05f0 <x-coredata:///Graphic/t840FE8AD-F2E7-4214-822F-7994FF93D4754> ; data: { canvas = nil; content = nil; frameRect = nil; label = nil; order = 0; path = nil; traits = nil; type = nil; }), You can see it's the same object, just totally bleached by Core Data. The relationship delete rouls apparently have nothing to do with it as I've set them to "No Action" in a test.

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  • JPopupMenu getParent() returning a null?

    - by Zenzen
    Ok so I'm working on an Eclipse plugin based on the JGraph example. The problem is I can't really get the "save" method to work, here's how the program works in short: - I have a DiagramEditor class with an init() method, where I create a GraphEditor object and call the createFrame() methord of that object. - GraphEditor extends the BasicGraphEditor (which extends JPanel), the createFrame() method returns a JFrame and has a line "frame.setJMenuBar(menuBar)" - the "menuBar" is an object variable, which is initialized in the BasicGraphEditor. Till here everything is cool, the problem is with the action listener which is supposed to save a file. To get the graph I need to get the GraphEditor component, so I do a Component component = (Component) e.getSource() whitch is the ActionEvent passed to that action listener and at that stage is the JMenuItem "save", then I get the parent which is the JPopupMenu, then I want to get that JPopupMenu's parent which should be the GraphEdiotor, but instead I get a null. Any idea why? Here's some source code: DiagramEditor.java: @Override public void init(IEditorSite site, IEditorInput input) throws PartInitException { setSite(site); setInput(input); this.diagram = ((DiagramEditorInput)input).getDiagram(); setPartName(this.diagram.getName()); gEditor = new GraphEditor(); gEditor.createFrame().setVisible(true); } BasicGraphEditor.java: public JFrame createFrame() { JFrame frame = new JFrame(); frame.getContentPane().add(this); frame.setJMenuBar(menuBar); //frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(870, 640); return frame; } In the constructor: menuBar = new JMenuBar(); menu = new JMenu("File"); menu.setMnemonic(KeyEvent.VK_F); menuBar.add(menu); JMenuItem openMenuItem = new JMenuItem("Open", KeyEvent.VK_O); // ADD FILE OPENING //openMenuItem.addActionListener(menuListener); menu.add(openMenuItem); JMenuItem saveMenuItem = new JMenuItem("Save", new ImageIcon("/images/save.gif")); saveMenuItem.setMnemonic(KeyEvent.VK_S); saveMenuItem.addActionListener( new SaveAction(false) ); menu.add(saveMenuItem); // menu.add(new SaveAction(false)); JMenuItem saveMenuItemAs = new JMenuItem("SaveAs", new ImageIcon("/images/saveas.gif")); //saveMenuItemAs.setMnemonic(KeyEvent.VK_S); saveMenuItemAs.addActionListener( new SaveAction(true) ); menu.add(saveMenuItemAs); //menu.add(new SaveAction(true)); JMenuItem closeMenuItem = new JMenuItem("Close", KeyEvent.VK_C); closeMenuItem.addActionListener( new ActionListener() { public void actionPerformed(ActionEvent e) { System.exit(0); } } ); menu.add(closeMenuItem);

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  • Ruby &&= edge case

    - by Alan O'Donnell
    Bit of an edge case, but any idea why &&= would behave this way? I'm using 1.9.2. obj = Object.new obj.instance_eval {@bar &&= @bar} # => nil, expected obj.instance_variables # => [], so obj has no @bar instance variable obj.instance_eval {@bar = @bar && @bar} # ostensibly the same as @bar &&= @bar obj.instance_variables # => [:@bar] # why would this version initialize @bar? For comparison, ||= initializes the instance variable to nil, as I'd expect: obj = Object.new obj.instance_eval {@foo ||= @foo} obj.instance_variables # => [:@foo], where @foo is set to nil Thanks!

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  • How to instanciate a class when its property members are not of primitive types?

    - by Richard77
    Hello, 1) Let's say I've a class MyDataInfo public class MyDataInfo { public int MyDataInfoID { get; set; } public string Name { get; set; } } For the purpose of the fuctionality I'm after, I've created another class (MyData) whose property members are of MyDataInfo type. 2) Here's myData public class MyData { public MyDataInfo Prop1 { get; set; } public MyDataInfo Prop2 { get; set; } } 3) And, here's my action method public ActionResult MyAction() { MyData myObject = new MyData(); return View(myObject); } 4) Finally, this in my View template (which is strongly typed and inherits from MyData) <% = Html.Encode (Model.Prop1.Name)%> <% = Html.Encode (Model.Prop2.Name)%> Unfortunately, I got an error "Object not set to an instance of an object." Am I missing something or is there a different way of obtaining the same result? Thanks for helping

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  • How would I UPDATE these table entries with SQL?

    - by CT
    I am working on an Asset Database problem. I enter assets into a database. Every object is an asset and has variables within the asset table. An object is also a type of asset. In this example the type is server. Here is the Query to retrieve all necessary data: SELECT asset.id ,asset.company ,asset.location ,asset.purchaseDate ,asset.purchaseOrder ,asset.value ,asset.type ,asset.notes ,server.manufacturer ,server.model ,server.serialNumber ,server.esc ,server.warranty ,server.user ,server.prevUser ,server.cpu ,server.memory ,server.hardDrive FROM asset LEFT JOIN server ON server.id = asset.id WHERE asset.id = '$id' How would I write a query to update an asset?

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  • .NET JAXB equivalent?

    - by Dan
    Is there an equivalent library for JAXB in .NET? I am trying to convert an XML I get to a .NET class. I have the XSD, but not sure how to convert the XML received into a concrete Class? I used the XSD tool to generate a class from the schema, but what I want to to convert the XML I receive on the fly to a object that I can work with in code. I've seen the thread here that deals with this, but my query is - I want the object created to contain the data that I receive in the XML (i.e. the field values must be populated).

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  • Do a database query on Textbox onblur event

    - by user279521
    I am using asp.net 3.5 with C#. I need to do a database lookup when a user enters ProductID in txtProductID. I guess doing javascript is out of the question since this will have to be server side call. I wrote this code in the page_load event of the webpage: protected void Page_Load(object sender, EventArgs e) { txtProductID.Attributes.Add("onblur", "LookupProduct()"); } protected void LookupUser() { //Lookup Product information on onBlur event; } I get an error message: Microsoft JScript runtime error: Object expected How can I resolve this ?

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  • playing video in custom size screen - view in iphone

    - by sagar
    OK. Some New Query Here. Suppose user taps on a button & video begins to play. Now when video plays, it always in full screen mode. But what do i need is explained below. Video should be played in a portrait mode. (but normally video is played in landscape mode ). How? Thanks in advance for sharing your knowledge with SO...

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  • Java mobile: Android or Blackberry?

    - by jpartogi
    Hi all, Most of the questions on SO has been too generic, comparing iPhone, Android and Blackberry all at once. I want to ask your experience between developing on Android and Blackberry. From your experience as Java programmer: Which platform do you enjoy developing on the most? Which API do you find is well written and fun to code? Which development platform that is fun to work with? Which platform do you find most stable and less issues with? Android or Blackberry? Any other noteworthy checklists to share to Java programmers that want to choose whether to develop on Android or Blackberry? Thank you for sharing your experience with us here.

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  • Mixed static and dynamic link on Mac OS

    - by barbaz
    I want to use gcc to produce a shared library, but i want to link some other libraries it depends on statically. Now to produce the "standard" dynamically linked output file i use gcc -dynamiclib *.o -lfoo -lbar -o outfile which would be gcc -shared *.o -lfoo -lbar -o outfile on for a binutils ld on a linux system. Now if i want libfoo and libbar to be linked statically, I can name the static libraries directly gcc -dynamiclib *.o /usr/lib/libfoo.a /usr/lib/libbar.a -o outfile however, that way i have to look for the library files myself. GNU binutils ld supports this: gcc -shared *.o -l:libfoo.a -l:libbar.a -o outfile but apple's ld doesnt. Is there a way to make apple's ld look for the static libraries himself? If not, is there another way that would avoid naming the exact location of the archives, e.g. producing an intermediate output file out of the object files requiring libfoo and libbar with the -static switch and linking that file together with the remaining objectfiles to create the dynamic object?

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  • Accessing Linq data in telerik grid ItemCreated method

    - by Jack
    Not sure if the title of this question makes sense, but here's my problem: I have a telerik grid bound to a Linq data object, however, I limit the fields returned: <IQueryable>filter = data.Select(x => new {x.ID, x.Name, x.Age}); I would like to access these fields in the ItemCreated method of the grid: protected void rgPeople_ItemCreated(object sender, GridItemEventArgs e) { Telerik.Web.UI.GridDataItem item = (GridDataItem)e.Item; ?????? Person = (???????)e.Item.DataItem; } What do I declare ?????? as so that I can use: String ID = Person.ID; String Name = Person.Name; etc

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  • Grails / GORM, Disable First-level Cache

    - by Stephen Swensen
    Suppose I have the following Domain class mapping to a legacy table, utilizing read-only second-level cache, and having a transient field: class DomainObject { static def transients = ['userId'] Long id Long userId static mapping = { cache usage: 'read-only' table 'SOME_TABLE' } } I have a problem, references to DomainObject are being shared due to first-level caching, and thus transient fields are writing over each other. For example, def r1 = DomainObject.get(1) r1.userId = 22 def r2 = DomainObject.get(1) r2.userId = 34 assert r1.userId == 34 That is, r1 and r2 are references to the same instance. This is undesirable, I would like to cache the table data without sharing references. Any ideas? [Edit] Understanding the situation better now, I believe my question boils down to the following: Is there anyway to disable first level cache for a specific domain class while still using second level cache?

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  • KRL and Yahoo Local Search

    - by Randall Bohn
    I'm trying to use Yahoo Local Search in a Kynetx Application. ruleset avogadro { meta { name "yahoo-local-ruleset" description "use results from Yahoo local search" author "randall bohn" key yahoo_local "get-your-own-key" } dispatch { domain "example.com"} global { datasource local:XML <- "http://local.yahooapis.com/LocalSearchService/V3/localsearch"; } rule add_list { select when pageview ".*" setting () pre { ds = datasource:local("?appid=#{keys:yahoo_local()}&query=pizza&zip=#{zip}&results=5"); rs = ds.pick("$..Result"); } append("body","<ul id='my_list'></ul>"); always { set ent:pizza rs; } } rule add_results { select when pageview ".*" setting () foreach ent:pizza setting pizza pre { title = pizza.pick("$..Title"); } append("#my_list", "<li>#{title}</li>"); } } The list I wind up with is . [object Object] and 'title' has {'$t' => 'Pizza Shop 1'} I can't figure out how to get just the title.

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  • flash player embedded in asp page which is opened in webbrowser control in .NET access through windo

    - by Prit
    I am develoing a windows application in C#.NET. In one of my winform I have added a WebBrowser control. In this webbrowser control I have opened an asp page from my local website. Now in this webpage there is one flash object which is used to play swf files. Now my question is can I access this control from my winform? If so then how? can u create a handler for that flash object?

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  • How do I do automatic data serialization of data objects in Haskell

    - by Adam Gent
    One of the huge benefits in languages that have some sort of reflection/introspecition is that objects can be automatically constructed from a variety of sources. For example in Java I can use the same objects for persisting to a db (with Hibernate) serializing to XML (with JAXB) or serializing to JSON (json-lib). You can do the same in Ruby and Python also usually following some simple rules for properties or annotations for Java. Thus I don't need lots "Domain Transfer Objects". I can concentrate on the domain I am working in. It seems in very strict FP like Haskell and Ocaml this is not possible. Particularly Haskell. The only thing I have seen is doing some sort of preprocessing or meta-programming (ocaml). Is it just accepted that you have to do all the transformations from the bottom upwards? In other words you have to do lot of boring work to turn a data type in haskell into JSON/XML/DB Row object and back again into a data object.

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  • I am deploying a Silverlight APPlication that calls a WCF Service

    - by Rico
    It Runs It Loads but when it calls the service I get An exception occurred during the operation, making the result invalid. Check InnerException for exception details. at System.ComponentModel.AsyncCompletedEventArgs.RaiseExceptionIfNecessary() at SalesSimplicityPO_SL.POSvc.GetPurchaseOrdersCompletedEventArgs.get_Result() at SalesSimplicityPO_SL.About.mySvc_GetPurchaseOrdersCompleted(Object sender, GetPurchaseOrdersCompletedEventArgs e) at SalesSimplicityPO_SL.POSvc.POSvcClient.OnGetPurchaseOrdersCompleted(Object state) What is the problem does anyone know? I load and call my web service like.. BasicHttpBinding binding = new BasicHttpBinding(); EndpointAddress address = new EndpointAddress(new Uri("http://localhost/POSystem/POSvc.svc")); POSvc.POSvcClient mySvc = new POSvc.POSvcClient(binding, address); mySvc.InsertPOCompleted += new EventHandler<SalesSimplicityPO_SL.POSvc.InsertPOCompletedEventArgs>(mySvc_InsertPOCompleted); mySvc.InsertPOAsync(InitialsTextBox.Text.ToString(), DescTextBox.Text.ToString(), ClientTextBox.Text.ToString()); Works great in debug.... What am i Doing to get this error?

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  • Get All Users in an Active Directory Group

    - by Matt Hanson
    I'm using the following code sample to get a list of all users in a specified AD group (in this case, all users in the "Domain Users" group). My listed code works great, with one exception: it won't return users who have their primary group set to "Domain Users". How can I get a list of all users in the group, including those who have it set as their primary group? Private Sub GetUsers() Dim groupSearcher As New DirectorySearcher Dim groupSearchRoot As New DirectoryEntry("LDAP://OU=Users,DC=domain,DC=com") With groupSearcher .SearchRoot = groupSearchRoot .Filter = "(&(ObjectClass=Group)(CN=Domain Users))" End With Dim members As Object members = groupSearcher.FindOne.GetDirectoryEntry.Invoke("Members", Nothing) For Each member As Object In CType(members, IEnumerable) Console.WriteLine(New DirectoryEntry(member).Name.Remove(0, 3)) Next End Sub

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  • Calling function dynamically by using Reflection

    - by Alaa'
    Hi, I'm generating dll files contain code like the following example : // using System; using System.Collections; using System.Xml; using System.IO; using System.Windows.Forms; namespace CSharpScripter { public class TestClass : CSharpScripter.Command { private int i=1; private int j=2; public int k=3; public TestClass6() { } public void display (int i,int j,int k) { string a = null; a= k.ToString(); string a1 = null; a1= this.i.ToString(); string a2 = null; a2= j.ToString(); MessageBox.Show(" working! "+ "k="+ a +" i="+a1 + " j="+ a2); } public void setValues(int i,int j,int k1) { this.i=i; this.j=j; k=k1; } // I'm compiling the pervious code, then I execute an object from the dll file. So, in the second part of the code ( Executing part), I'm just calling the execute function, It contains a call for a function, I named here: display. For that I need to set values in the declaration by a setValue function. I want it to been called dynamically (setValues ), which has declaration like : public void(Parameter[] parameters) { //some code block here } For this situation I used Reflection. // Type objectType = testClass.GetType(); MethodInfo members = objectType.GetMethod("setValues"); ParameterInfo[] parameters = members.GetParameters(); For) int t = 0; t < parameters.Length; t++) { If (parameters[t]. ParameterType == typeof()) { object value = this.textBox2.Text; parameters.SetValue)Convert.ChangeType(value,parameters[t].ParameterType), t); } } // But it throws an casting error" Object cannot be stored in an array of this type." at last line, in first parameter for (setValue) methode. What is the problem here? And How I can call the method Dynamically after the previous code, by( Invoke) or is there a better way? Thanks.

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  • java spring and ftl

    - by bobby
    I defined a modelview object named "buttonpressed" in spring controller file and I need to access that modelview object in ftl(freemarker) file which is being returned as a view from a controller like abcd.java The abcd.java controller code is as below if (questionAnswer.getAnswerId() == 1045) { modelAndView.addObject("buttonPressed","You have been added in mailing list"); modelAndView.setViewName("enterCode_nextSteps"); } else { modelAndView.addObject("buttonPressed","Not added in the mailing list"); modelAndView.setViewName("enterCode_nextSteps"); } the below ajax function is working fine currently but I am not sure how to access this object called "buttonpressed" in this ajax function. I have written like the way mentioned below but when i am clicking the submit link its not calling "partner.do" and also throwing error saying #buttonPressed is undefind (but in the script below its working fine and calling "partner.do" and even posting data) So is that problem coming from javsscript code i mean due to incorrect use of "buttonPressed" or might be problem from spring controller abcd.java file. <div class="partnerOptInBox"> <div id="optInContent"> <form name="partnerOptIn"> <h4>Want the Latest</h4> <p class="pad10Top">${partnerOpt.translation}</p> <div class="pad10Top"> <input type="radio" name="questionAnswer['${partnerOpt.questionId}']" value="${partnerOpt.getAnswers()[0].answerId}" class="radioButton" /> <label for="questionAnswer['${partnerOpt.questionId}']" class="formLabel pad20Right">Yes</label> <input type="radio" name="questionAnswer['${partnerOpt.questionId}']" class="radioButton" value="${partnerOpt.getAnswers()[1].answerId}" /> <label for="questionAnswer['${partnerOpt.questionId}']" class="formLabel">No</label> </div> <div id="optInError" class="formError" style="display:none;">Oops... your request did not go through, please try again.</div> <div class="pad15Top"> <a href="javascript:submitOptIn();"><img src="images/theme/btn_opt_in_submit.gif"/></a> </div> </form> <script type="text/javascript"> function submitOptIn() { $('optInError').hide(); dataString = $('#partnerOptIn').serialize(); $.ajax({ data: dataString, url: "partnerOpt.do", timeout: 30000, type: "POST", success: function(html){ var newHtml = "<h4>Thank you</h4><p>We appreciate your time to respond to our request.</p>"; $('#optInContent').html(newHtml); }, */trying this code for sucess is throwing me an error /* <!-- buttonpressed function--> success: function(html){ $('#optInContent').html(${buttonPressed}); }, <!-- buttonpressed function--> error: function(){ $('#optInError').show(); } }); } </script>

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  • control panel date&time is considered while using "new date()" javascript function.

    - by Rupa
    Hi, I am getting a client date in javscript function using "new date()" object. But this object is considering the properties set for Date&Time control in the control panel of the system. For example, If I check the check box of Date&Time control of the system (control panel) "Automatically adjust clock for daylight saving changes", then I am getting the date(from javscript) according to the Daylight savings time and if I uncheck it, I am getting the date according to the standard time. What I need is to get the date from a Javscript function irrespective of the Date&Time control of the control panel. Thanks Rupa.

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  • Is it possible to create ICriteria/ICriterion from LINQ or HQL?

    - by adrin
    I am creating a method that can create filter understood by NHibernate (by filter i mean a set of ICriteria object for example) from my abstract filter object. public static IEnumerable<ICriterion> ToNhCriteria(this MyCriteria criteria) { // T4 generated function // lots of result.Add(Expression.Or(Expression.Eq(),Expression.Eq)) expression trees - hard to generate // Is there a way to generate HQL/Linq query here istead? } then i want to do something like session.CreateCriteria<Entity>().Add(myCriteria.ToNhCriteria()) to filter entities. The problem is that using Expression. methods (Expression.Or etc) is quite tedious (the method is generated and i have multiple or statements that have to be joined into an expression somehow). Is there a way to avoid using Expression.Or() and create ICrietrion / ICriteria using LINQ or HQL?

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  • Flex ; get the value of RadioButton inside a FormItem

    - by numediaweb
    Hi, I'm working on Flash Builder with latest flex SDK. I have a problem getting the value radioButton of the selceted radio button inside a form: <mx:Form id="form_new_contribution"> <mx:FormItem label="Contribution type" includeIn="project_contributions"> <mx:RadioButtonGroup id="myG" enabled="true" /> <mx:RadioButton id="subtitle" label="subtitle" groupName="{myG}" value="subtitle"/> <mx:RadioButton id="note" label="notes / chapters" groupName="{myG}" value="note"/> </mx:FormItem> </mx:Form> the function is: protected function button_add_new_clickHandler(event:MouseEvent):void{ Alert.show(myG.selectedValue.toString()); } I tried also: Alert.show(myG.selection.toString()); bothe codes show error: TypeError: Error #1009: Cannot access a property or method of a null object reference. and if It only works if I put : Alert.show(myG.toString()); it alerts : Object RadioButtonGroup thanx for any hints, and sorry for the long message :)

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