Search Results

Search found 9718 results on 389 pages for 'classes'.

Page 302/389 | < Previous Page | 298 299 300 301 302 303 304 305 306 307 308 309  | Next Page >

• VS2008 DataSet Wizard doesn't match tables for updating

  - by James H

  Hi all, first question ever on this site. I've been having a real stubborn problem using Visual Studio 2008 and I'm hoping someone has figured this out before. I have 2 libraries and 1 project that use strongly typed datasets (MSSQL backend) that I generated using the "Configure DataSet with Wizard" option on in Data Sources. I've had them working just fine for awhile and I've written a lot of code in the non-designer file for the row classes. I've also specified a lot of custom queries using the dataset designer. This is all work I can't afford to loose. I've recently made some changes to re-organize my libraries which included changing the names of the libraries themselves. I also changed the connection string to point to a different database which is a development copy (same exact schema). Problem is now when I open up "Configure DataSet with Wizard" to pickup a new column I've added to one of the tables it no longer matches the tables correctly in the wizard. The wizard displays all of the tables in the database and none of them have check boxes next to them (ie: are not part of this dataset). Below those it shows all of the tables again but with red Xs and these are checked. Basically meaning that Visual Studio sees all of the tables it currently has in the DataSet and sees all of the tables in the database, but believes they are no longer the same and thus do not match! I've had this same thing happen quite awhile back and I think I just re-built the xsd from scratch and manually copied the code over and then had to redefine all of the custom queries I built in the dataset designer. That's not a good solution. I'm looking for 2 answers: 1. What causes this to happen and how to prevent it. 2. How do I fix this so that the wizard once again believes the tables in its xsd are the same tables that are in the database (yes, they have the exact same names still). Thanks.

  Read the article

• Naming convention for non-virtual and abstract methods

  - by eagle

  I frequently find myself creating classes which use this form (A): abstract class Animal { public void Walk() { // TODO: do something before walking // custom logic implemented by each subclass WalkInternal(); // TODO: do something after walking } protected abstract void WalkInternal(); } class Dog : Animal { protected override void WalkInternal() { // TODO: walk with 4 legs } } class Bird : Animal { protected override void WalkInternal() { // TODO: walk with 2 legs } } Rather than this form (B): abstract class Animal { public abstract void Walk(); } class Dog : Animal { public override void Walk() { // TODO: do something before walking // custom logic implemented by each subclass // TODO: walk with 4 legs // TODO: do something after walking } } class Bird : Animal { public override void Walk() { // TODO: do something before walking // custom logic implemented by each subclass // TODO: walk with 2 legs // TODO: do something after walking } } As you can see, the nice thing about form A is that every time you implement a subclass, you don't need to remember to include the initialization and finalization logic. This is much less error prone than form B. What's a standard convention for naming these methods? I like naming the public method Walk since then I can call Dog.Walk() which looks better than something like Dog.WalkExternal(). However, I don't like my solution of adding the suffix "Internal" for the protected method. I'm looking for a more standardized name. Btw, is there a name for this design pattern?

  Read the article

• Design considerations for temporarily transforming a player into an animal in a role playing game

  - by mikedev

  I am working on a role playing game for fun and to practice design patterns. I would like players to be able to transform themselves into different animals. For example, a Druid might be able to shape shift into a cheetah. Right now I'm planning on using the decorator pattern to do this but my question is - how do I make it so that when a druid is in the cheetah form, they can only access skills for the cheetah? In other words, they should not be able to access their normal Druid skills. Using the decorator pattern it appears that even in the cheetah form my druid will be able to access their normal druid skills. class Druid : Character { // many cool druid skills and spells void LightHeal(Character target) { } } abstract class CharacterDecorator : Character { Character DecoratedCharacter; } class CheetahForm : CharacterDecorator { Character DecoratedCharacter; public CheetahForm(Character decoratedCharacter) { DecoratedCharacter= decoratedCharacter; } // many cool cheetah related skills void CheetahRun() { // let player move very fast } } now using the classes Druid myDruid = new Druid(); myDruid.LightHeal(myDruid); // casting light heal here is fine myDruid = new CheetahForm(myDruid); myDruid.LightHeal(myDruid); // casting here should not be allowed Hmmmm...now that I think about it, will myDruid be unable to us the Druid class spells/skills unless the class is down-casted? But even if that's the case, is there a better way to ensure that myDruid at this point is locked out from all Druid related spells/skills until it is cast back to a Druid (since currently it's in CheetahForm)

  Read the article

• Factory Pattern: Determining concrete factory class instantiation?

  - by Chris

  I'm trying to learn patterns and I'm stuck on determining how or where a Factory Pattern determines what class to instanciate. If I have a Application that calls the factory and sends it, say, an xml config file to determine what type of action to take, where does that logic for interpreting the config file happen? THE FACTORY using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace myNamespace { public abstract class SourceFactory { abstract public UploadSource getUploadSource(); } public class TextSourceFactory : SourceFactory { public override UploadSource getUploadSource() { return new TextUploadSource(); } } public class XmlSourceFacotry : SourceFactory { public override UploadSource getUploadSource() { return new XmlUploadSource(); } } public class SqlSourceFactory : SourceFactory { public override UploadSource getUploadSource() { return new SqlUploadSource(); } } } THE CLASSES using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace myNamespace { public abstract class UploadSource { abstract public void Execute(); } public class TextUploadSource : UploadSource { public override void Execute() { Console.WriteLine("You executed a text upload source"); } } public class XmlUploadSource : UploadSource { public override void Execute() { Console.WriteLine("You executed an XML upload source"); } } public class SqlUploadSource : UploadSource { public override void Execute() { Console.WriteLine("You executed a SQL upload source"); } } }

  Read the article

• MS Access form_current() firing multiple times

  - by Eric G

  I have a form with two subforms (on separate tab pages). It's an MDB project in Access 2003. When it initially opens, Form_Current on the active subform fires once, as it should. But when you move to another record (ie. from the main form), it fires Form_Current on the active subform 4 times. Then subsequent record-moves result in Form_Current firing 2 times. This is a pain, because the subforms have a lot of fields that get moved and/or hidden and so it jumps around for every Form_Current, not to mention being slow. I am opening the form with a filter via DoCmd.OpenForm (actually it sends the filter in via OpenArgs). FilterOn is only set once, in Form_Open on the main form, never in the subforms. Form_Current is not called explicitly anywhere else in the code. When I look at the call stack when Form_Current fires moving the first time, it looks like: my_subform.Form_Current [<Debug Window>] my_subform.Form_Current So it seems like something in Form_Current is triggering another Form_Current event. But only on the first record move. The code in Form_Current is somewhat complex, involving custom classes and event callbacks, but generally does not touch the table data. The only thing I can think might be triggering a Form_Current is that it checks OldValue on form controls - could this be causing it? Or anything else come to mind? Thanks. Eric

  Read the article

• Memory Leak question

  - by franz

  I am having a memory leak issue with the following code. As much as I can tell I don't see why the problem persists but it still does not release when called. I am detecting the problem in instruments and the following code is keeping its "cards" classes alive even when it should had released them. Any help welcome. ... ... -(id)initDeckWithCardsPicked: (NSMutableArray*)cardsPicked andColors:(NSMutableArray*)cardColors { self = [self init]; if (self != nil) { int count = [cardsPicked count]; for (int i=0; i<count; i++) { int cardNum = [[cardsPicked objectAtIndex:i] integerValue]; Card * card = [[MemoryCard alloc] initWithSerialNumber:cardNum position: CGPointZero color:[cardColors objectAtIndex:i]]; [_cards addObject: card]; [card release]; } } return self; } - (id) init { self = [super init]; if (self != nil) { self.bounds = (CGRect){{0,0},[Card cardSize]}; self.cornerRadius = 8; self.backgroundColor = kAlmostInvisibleWhiteColor; self.borderColor = kHighlightColor; self.cards = [NSMutableArray array]; } return self; } ... ...

  Read the article

• How to get around the event bubble using jQuery's: .live()

  - by Nick

  Hi there. Here is the code in question: $(".navItems>ul>li").live('click', function(){ var selectorID = $(this).attr('id'); $(".infoList").slideUp('fast', function(){ switchTabInfo(selectorID); }); function switchTabInfo(selectorID){ var actionID = selectorID.substring(4); actionID = "#" + actionID; $(actionID).slideDown(); } So in short i have a these .infoList classes with id names tied to back to the nav li id. That lists item's id might be nav_testsHistory for example. With all the content boxes hidden by class name this javascript makes a pleasing slide up, down effect. But the third content box flickers as will the second one after a third box push. It slides up and down a second unnecessary time. If I add an alert like this: $(".navItems>ul>li").live('click', function(){ var selectorID = $(this).attr('id'); $(".infoList").slideUp('fast', function(){ switchTabInfo(selectorID); alert('bubble'); }); The alert fires 3 times?! So my research took to reading about the event bubble. What I cannot find is how to check if it has been fired. I have not tried setting an input val and doing a tf test around the nested slider action. Cause that's crude. More info, all the code above is in a function, which is in an init() function, which is called on document ready. That's the only js file besides jquery 1.3.2. What do you guys think?

  Read the article

• EF4 and multiple abstract levels

  - by Cedric

  I need to use inheritance with EF4 and the TPH model created from DB. I created a new projet to test simples classes. There is my class model: There is my table in SQL SERVER 2008 : VEHICLE ID : int PK Owner : varchar(50) Consumption : float FirstCirculationDate : date Type : varchar(50) Discriminator : varchar(10) I added a condition in my EDMX on the Discriminator field to differentiate the Scooter, Car, Motorbike and Bike entities. MotorizedVehicle and Vehicle are Abstract. But when I compile, this error appears : Error 3032: Problem in mapping fragments starting at lines 78, 85:EntityTypes EF4InheritanceModel.Scooter, EF4InheritanceModel.Motorbike, EF4InheritanceModel.Car, EF4InheritanceModel.Bike are being mapped to the same rows in table Vehicle. Mapping conditions can be used to distinguish the rows that these types are mapped to. Edit : To Ladislav : I try it and error change to become it for all of my entities : Error 3034: Problem in mapping fragments starting at lines 72, 86:An entity is mapped to different rows within the same table. Ensure these two mapping fragments do not map two groups of entities with overlapping keys to two distinct groups of rows. To Henk (with Ladislay suggestion) : There are all of mappings details : What's wrong ? Thanks

  Read the article

• How can I include additional markup within a 'Content' inner property within an ASP.Net WebControl?

  - by GenericTypeTea

  I've searched the site and I cannot find a solution for my problem, so apologies if it's already been answered (I'm sure someone must have asked this before). I have written a jQuery Popup window that I've packaged up as a WebControl and IScriptControl. The last step is to be able to write the markup within the tags of my control. I've used the InnerProperty attribute a few times, but only for including lists of strongly typed classes. Here's my property on the WebControl: [PersistenceMode(PersistenceMode.InnerProperty)] [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] public something??? Content { get { if (_content == null) { _content = new something???(); } return _content; } } private something??? _content; Here's the HTML Markup of what I'm after: <ctr:WebPopup runat="server" ID="win_Test" Hidden="false" Width="100px" Height="100px" Modal="true" WindowCaption="Test Window" CssClass="window"> <Content> <div style="display:none;"> <asp:Button runat="server" ID="Button1" OnClick="Button1_Click" /> </div> <%--Etc--%> <%--Etc--%> </Content> </ctr:WebPopup> Unfortunately I don't know what type my Content property should be. I basically need to replicate the UpdatePanel's ContentTemplate. EDIT: So the following allows a Template container to be automatically created, but no controls show up, what's wrong with what I'm doing? [PersistenceMode(PersistenceMode.InnerProperty)] [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] public ITemplate Content { get { return _content; } set { _content = value; } } private ITemplate _content;

  Read the article

• GetEffectiveRightsFromAcl throws invalid acl error

  - by apoorv020

  I am trying to get the effective rights a user has on a file using interop in C#. Following is the code I am using : public static FileSystemRights GetFileEffectiveRights(string FileName, string UserName) { IntPtr pDacl, pZero = IntPtr.Zero; int Mask = 0; uint errorReturn = GetNamedSecurityInfo(FileName, SE_OBJECT_TYPE.SE_FILE_OBJECT, SECURITY_INFORMATION.Dacl , out pZero, out pZero, out pDacl, out pZero, out pZero); if (errorReturn != 0) { throw new Exception("Win error : " + errorReturn); } Program.TRUSTEE pTrustee = new TRUSTEE(); pTrustee.pMultipleTrustee = IntPtr.Zero; pTrustee.MultipleTrusteeOperation = (int)Program.MULTIPLE_TRUSTEE_OPERATION.NO_MULTIPLE_TRUSTEE; pTrustee.ptstrName = UserName; pTrustee.TrusteeForm = (int)Program.TRUSTEE_FORM.TRUSTEE_IS_NAME; pTrustee.TrusteeType = (int)Program.TRUSTEE_TYPE.TRUSTEE_IS_USER; errorReturn = GetEffectiveRightsFromAcl(pDacl, ref pTrustee, ref Mask); if (errorReturn != 0) { throw new Exception("Win error : " + errorReturn); } return (FileSystemRights)Mask; } This code works fine until I start modifying the ACL structure using the classes FileAccessRule and FileInfo, and then I start getting Windows Error 1336 : ERROR_INVALID_ACL. Same is the case if I debug the process call GetFileEffectiveRights once, pause the process,change the ACL through windows API, and resume and call GetFileEffectiveRights again(the 1st call succeeds but the second gives 1336.) What is going wrong?

  Read the article

• Holding value in collection

  - by Amit Ranjan

  I have a application which is on timesheet. I have total of 54 columns out of which 10 columns are visible rest invisible. First 3 columns are Project, MileStone and Classes. Rest are Sun- Sat work hrs. Now I have a column named 'taskid' as SunTaskID,MonTaskID and so on till SatTaskID for holding each days taskid. Now on the selection of SunHrs (Sunday's Work Hrs), i retrieve that days taskid and on the basis of task id i retrieve attachments which is displayed under a listbox. Now the problem is that since a day can have multiple attachments and a user can attach multiple attachments at time. He can enter values from grid to. Grid cells are editable. I am using BindingList(of TaskClass) in VB.Net for binding grid. I have total 54 properties n my task class. So i want to what property do i need to hod each days attachment and in what way. Earlier I tried Dictionary. But i was not aware of its usage as a property so i gave. Then prepared a separate class for attachment but, it was difficult to synchronize the existing attachments with taskid...

  Read the article

• Serializing MDI Winforms for persistency

  - by Serge

  Hello, basically my project is an MDI Winform application where a user can customize the interface by adding various controls and changing the layout. I would like to be able to save the state of the application for each user. I have done quite a bit of searching and found these: http://stackoverflow.com/questions/2076259/how-to-auto-save-and-auto-load-all-properties-in-winforms-c http://stackoverflow.com/questions/1669522/c-save-winform-or-controls-to-file Basically from what I understand, the best approach is to serialize the data to XML, however winform controls are not serializable, so I would have use surrogate classes: http://www.codeproject.com/KB/dotnet/Surrogate_Serialization.aspx Now, do I need to write a surrogate class for each of my controls? I would need to write some sort of a recursive algorithm to save all my controls, what is the best approach to do accomplish that? How would I then restore all the windows, should I use the memento design pattern for that? If I want to implement multiple users later, should I use Nhibernate to store all the object data in a database? I am still trying to wrap my head around the problem and if anyone has any experience or advice I would greatly appreciate it, thanks.

  Read the article

• How to emulate "-lib foo.jar" from _within_ build.xml

  - by Thorbjørn Ravn Andersen

  By specifying "-lib foo.jar" to ant I get the behaviour that the classes in foo.jar is added to the ant classloader and are available for various tasks taking a class name argument. I'd like to be able to specify the same behaviour but only from inside build.xml (so we can do this on a vanilla ant). For taskdefs we have functioning code looking like: <taskdef resource="net/sf/antcontrib/antlib.xml" description="for/foreach tasks"> <classpath> <pathelement location="${active.workspace}/ant-contrib-1.X/lib/ant-contrib.jar" /> </classpath> </taskdef> where the definition is completely provided from the ant-contrib.jar listed. What is the equivalent mechanism for the "global" ant classpath? (I have thought out that this is the way to get <javac> use ecj-3.5.jar to compile with on a JRE - http://stackoverflow.com/questions/2364006/specifying-the-eclipse-compiler-completely-from-within-build-xml - in a way compatible with ant 1.7. Better suggestions are welcome :) EDIT: It appears that the about-to-be-released version 1.0 of ant4eclipse includes ecj. This does not answer the question, but may solve my basic problem.

  Read the article

• Is there any way to combine transparency and "ajax usability" with HTML templates

  - by Sam

  I'm using HTML_Template_Flexy in PHP but the question should apply to any language or template library. I am outputting a list of relatively complex objects. In the beginning I just iterated over a list of the objects and called a toHtml method on them. When I was about to have my layout designer look over the template I noticed that it was too opaque and that he would have ended up looking through and/or editing many additional php source files to see what really gets generated by the toHtml method. So I extracted most of the HTML strings in the php classes up to the template which made for one clear file where you can see the whole page structure at once. However this causes problems when you want to add an object to the list using javascript. Then I have to keep the old toHtml method and maintain both the main template and the html strings at the same time, so I can output just the HTML for a new object that should be added to the page. So I'm back to the idea of using smaller templates for the objects that make up the page, but I was wondering if there was some easy way of having my cake and eating it too by having one template that shows the whole page but also the mini-templates for smaller objects on the page. Edit: Yes, updating the page is not a problem at all. My concern is with having both maintainability and transparency of the template files. If I have one single template for the whole page, then I must maintain mini-templates of the objects that are shown on the page. If I just have the mini-templates and include them from the higher-level template it becomes more difficult to look at the top-level html and imagine what the end result will look like.

  Read the article

• Is this a good way to expose generic base class methods through an interface?

  - by Nate Heinrich

  I am trying to provide an interface to an abstract generic base class. I want to have a method exposed on the interface that consumes the generic type, but whose implementation is ultimately handled by the classes that inherit from my abstract generic base. However I don't want the subclasses to have to downcast to work with the generic type (as they already know what the type should be). Here is a simple version of the only way I can see to get it to work at the moment. public interface IFoo { void Process(Bar_base bar); } public abstract class FooBase<T> : IFoo where T : Bar_base { abstract void Process(T bar); // Explicit IFoo Implementation void IFoo.Process(Bar_base bar) { if (bar == null) throw new ArgumentNullException(); // Downcast here in base class (less for subclasses to worry about) T downcasted_bar = bar as T; if (downcasted_bar == null) { throw new InvalidOperationException( string.Format("Expected type '{0}', not type '{1}'", T.ToString(), bar.GetType().ToString()); } //Process downcasted object. Process(downcasted_bar); } } Then subclasses of FooBase would look like this... public class Foo_impl1 : FooBase<Bar_impl1> { void override Process(Bar_impl1 bar) { //No need to downcast here! } } Obviously this won't provide me compile time Type Checking, but I think it will get the job done... Questions: 1. Will this function as I think it will? 2. Is this the best way to do this? 3. What are the issues with doing it this way? 4. Can you suggest a different approach? Thanks!

  Read the article

• help with Firefox extension

  - by Johnny Grass

  I'm writing a Firefox extension that creates a socket server which will output the active tab's URL when a client makes a connection to it. I have the following code in my javascript file: var serverSocket; function startServer() { var listener = { onSocketAccepted : function(socket, transport) { try { var outputString = gBrowser.currentURI.spec + "\n"; var stream = transport.openOutputStream(0,0,0); stream.write(outputString,outputString.length); stream.close(); } catch(ex2){ dump("::"+ex2); } }, onStopListening : function(socket, status){} }; try { serverSocket = Components.classes["@mozilla.org/network/server-socket;1"] .createInstance(Components.interfaces.nsIServerSocket); serverSocket.init(7055,true,-1); serverSocket.asyncListen(listener); } catch(ex){ dump(ex); } document.getElementById("status").value = "Started"; } startServer(); As it is, it works for multiple tabs in a single window. If I open multiple windows, it ignores the additional windows. I think it is creating a server socket for each window, but since they are using the same port, the additional sockets fail to initialize. I need it to create a server socket when the browser launches and continue running when I close the windows (Mac OS X). As it is, when I close a window but Firefox remains running, the socket closes and I have to restart firefox to get it up an running. How do I go about that?

  Read the article

• Swig: No Constructor defined

  - by wheaties

  I added %allowexcept to my *.i file when building a Python <-- C++ bridge using Swig. Then I removed that preprocessing directive. Now I can't get the Python produced code to recognize the constructor of a C++ class. Here's the class file: #include <exception> class Swig_Foo{ public: Swig_Foo(){} virtual ~Swig_Foo(){} virtual getInt() =0; virtual throwException() { throw std::exception(); } }; And here's the code Swig produces from it: class Swig_Foo: __swig_setmethods__ = {} __setattr__ = lambda self, name, value: _swig_setattr(self, Swig_Foo, name, value) __swig_getmethods__ = {} __getattr__ = lambda self, name: _swig_getattr(self, Swig_Foo, name) def __init__(self): raise AttributeError, "No constructor defined" __repr__ = _swig_repr __swig_destroy__ = _foo.delete_Swig_Foo __del__ = lambda self : None; def getInt(*args): return apply(_foo.Swig_Foo_getInt, args) def throwOut(*args): return apply(_foo.Swig_Foo_throwOut, args) Swig_Foo_swigregister = _foo.Swig_Foo_swigregister Swig_Foo_swigregister(Swig_Foo) The problem is the def __init__self): raise AttributeError, "No constructor defined" portion. It never did this before I added the %allowexception and now that I've removed it, I can't get it to create a real constructor. All the other classes have actual constructors. Quite baffled. Anyone know how I can get it to stop doing this?

  Read the article

• Using wildcards in prepared statement - MySQLi

  - by Michael Irwin

  Hi! I'm trying to run the following query, and I'm having trouble with the wildcard. function getStudents() { global $db; $users = array(); $query = $db->prepare("SELECT id, adminRights FROM users WHERE classes LIKE ? && adminRights='student'"); $query->bind_param('s', '%' . $this->className . '%'); $query->execute(); $query->bind_result($uid, $adminRights); while ($query->fetch()) { if (isset($adminRights[$this->className]) && $adminRights[$this->className] == 'student') $users[] = $uid; } $query->close(); return $users; } I'm getting an error that states: Cannot pass parameter 2 by reference. The reason I need to use the wildcard is because the column's data contains serialized arrays. I guess, if there's an easier way to handle this, what could I do? Thanks in advance!

  Read the article

• Python pixel manipulation library

  - by silinter

  So I'm going through the beginning stages of producing a game in Python, and I'm looking for a library that is able to manipulate pixels and blit them relatively fast. My first thought was pygame, as it deals in pure 2D surfaces, but it only allows pixel access through pygame.get_at(), pygame.set_at() and pygame.get_buffer(), all of which lock the surface each time they're called, making them slow to use. I can also use the PixelArray and surfarray classes, but they are locked for the duration of their lifetimes, and the only way to blit them to a surface is to either copy the pixels to a new surface, or use surfarray.blit_array, which requires creating a subsurface of the screen and blitting it to that, if the array is smaller than the screen (if it's bigger I can just use a slice of the array, which is no problem). I don't have much experience with PyOpenGL or Pyglet, but I'm wondering if there is a faster library for doing pixel manipulation in, or if there is a faster method, in Pygame, for doing pixel manupilation. I did some work with SDL and OpenGL in C, and I do like the idea of adding vertex/fragment shaders to my program. My program will chiefly be dealing in loading images and writing/reading to/from surfaces.

  Read the article

• Managing resource closure in a servlet container

  - by Steven Schlansker

  I'm using Tomcat as a servlet container, and have many WARs deployed. Many of the WARs share common base classes, which are replicated in each context due to the different classloaders, etc. How can I ensure resource cleanup on context destruction, without hooking each and every web.xml file to add context listeners? Ideally, I'd like something along the lines of class MyResourceHolder implements SomeListenerInterface { private SomeResource resource; { SomeContextThingie.registerDestructionListener(this); } public void onDestroy() { resource.close(); } } I could put something in each web.xml, but since there are potentially many WARs and only ones that actually initialize the resource need to clean it up, it seems more natural to register for cleanup when the resource is initialized rather than duplicating a lot of XML configuration and then maybe cleaning up. (In this particular case, I'm initiating an orderly shutdown of a SQL connection pool. But I see this being useful in many other situations as well...) I'm sure there's some blisteringly obvious solution out there, but my Google-fu is failing me right now. Thanks!

  Read the article

• Apache with JBOSS using AJP (mod_jk) giving spikes in thread count.

  - by Beginner

  We used Apache with JBOSS for hosting our Application, but we found some issues related to thread handling of mod_jk. Our website comes under low traffic websites and has maximum 200-300 concurrent users during our website's peak activity time. As the traffic grows (not in terms of concurrent users, but in terms of cumulative requests which came to our server), the server stopped serving requests for long, although it didn't crash but could not serve the request till 20 mins. The JBOSS server console showed that 350 thread were busy on both servers although there was enough free memory say, more than 1-1.5 GB (2 servers for JBOSS were used which were 64 bits, 4 GB RAM allocated for JBOSS) In order to check the problem we were using JBOSS and Apache Web Consoles, and we were seeing that the thread were showing in S state for as long as minutes although our pages take around 4-5 seconds to be served. We took the thread dump and found that the threads were mostly in WAITING state which means that they were waiting indefinitely. These threads were not of our Application Classes but of AJP 8009 port. Could somebody help me in this, as somebody else might also got this issue and solved it somehow. In case any more information is required then let me know. Also is mod_proxy better than using mod_jk, or there are some other problems with mod_proxy which can be fatal for me if I switch to mod__proxy? The versions I used are as follows: Apache 2.0.52 JBOSS: 4.2.2 MOD_JK: 1.2.20 JDK: 1.6 Operating System: RHEL 4 Thanks for the help.

  Read the article

• XML serialization of a collection in C#

  - by Archana R

  I have two classes as follows: public class Info { [XmlAttribute] public string language; public int version; public Book book; public Info() { } public Info(string l, int v, string author, int quantity, int price) { this.language = l; this.version = v; book = new Book(author, quantity, price); } } public class Book { [XmlAttribute] public string author; public int quantity; public int price; [XmlIgnore]public int total; public NameValueCollection nvcollection = new NameValueCollection(); public Book() { } public Book(string author, int quantity, int price) { this.author = author; this.quantity = quantity; this.price = price; total = quantity * price; nvcollection.Add(author, price.ToString()); } } I have created an ArrayList which adds the two instances of Info class as follows: FileStream fs = new FileStream("SerializedInfo.XML", FileMode.Create); List<Info> arrList = new List<Info>(); XmlSerializer xs = new XmlSerializer(typeof(List<Info>)); Info pObj = new Info("ABC", 3, "DEF", 2, 6); Info pObj1 = new Info("GHI", 4, "JKL", 2, 8); arrList.Add(pObj); arrList.Add(pObj1); xs.Serialize(fs, arrList); fs.Close(); But when I try to serialize, I get an exception as "There was an error reflecting type 'System.Collections.Generic.List`1[ConsoleApplicationSerialization.Info]'." Can anyone help me with it? Also, instead of namevaluecollection, which type of structure can i use?

  Read the article

• Unable to use .xjb file inside wsdlc ant task

  - by Govind

  Hi, I have a requirement of customize the default conversion provided by JAXB. For the xs:date type we need to show only the date part(removing the time). I have created an .xjb file and used the xjc command to generate the required classes. This is working perfectly and I got the desired results. Since in our project we create the web service jars using ant I tried to include it inside the wsdlc ant task I get the error as: dateFormatter.xjb is not a xsd config file. <target name="generate-service-from-wsdl" depends="validate-weblogic, clean"> <taskdef name="wsdlc" classname="weblogic.wsee.tools.anttasks.WsdlcTask" /> <wsdlc srcWsdl="${sourceWsdl}/My_Gateway.wsdl" verbose="on" destJwsDir="${targetDir}" destImplDir="${targetDir}/impl" packageName="${servicePackage}" > <xsdConfig dir="wsdls/xjb" includes="dateFormatter.xjb"/> </wsdlc> </target> I am using Weblogic 9.2 and tried the using Weblogic 10.3 jar using the binding tag instead of xsdConfig. But I get the same error. Please let me know where am I making the mistake and how to correct it. Thanks, Govind.

  Read the article

• Pulling info from database and dynamically adding them into different divs

  - by Matt Nathanson

  This may be a bit of a php n00b question but i've managed to get it working this far and I'm a little bit stuck. I'm pulling 12 images with descriptions out of a database. I want to insert them into a client rotator that has 3 sets of 4. They will be contained in divs called clientrotate1, clientrotate2, and clientrotate3 respectively. Inside each of those divs I want to have 4 images with classes thumb1, thumb2, thumb3, and thumb4 I am successful in having the images and descriptions pull into clientrotator 1. Where I get stuck is to how to dynamically add the 2nd and 3rd set of data into clientrotator2 and clientrotator3. Here is my function: public function DisplayClientRotator(){ $result = mysql_query( 'SELECT * FROM project ORDER BY id DESC LIMIT 12' ) or die("SELECT Error: ".mysql_error()); $iterator = 1; while ($row = mysql_fetch_assoc($result)) { echo "<div id='clientrotate1'>"; echo "<div class='thumb$iterator'>"; echo "<img style='width: 172px; height: 100px;' src=".$row['photo']." />"; echo "<div class='transbox'>"; echo "<div class='thumbtext'>"; echo $row['campaign']; echo "</div>"; echo "</div>"; echo "</div>"; echo "</div>"; $iterator++; } Any help or pointers int he right direction would be greatly appreciated! Thanks so much, Matt

  Read the article

• Should i use a trigger or Behaviors for this?

  - by Michael

  I have an abstract object called Applicant and two different types of objects that inherit from Applicant called Business and Individual. So I have three classes that look like this: public abstract class Applicant { ... } public class Individual : Applicant { ... } public class Business : Applicant { ... } Now in the DataGrid I want to show all the details of Applicant object. When you choose a row I want to show details of either the business or individual as a internal grid. Something like this <DataGrid> <DataGrid.Columns> <!--Show different columns --> </DataGrid.Columns> <DataGrid.RowDetailsTemplate> <!--Show if Individual --> <DataGrid> <DataGrid.Columns> <DataGridTextColumn Header="First Name" ... /> <DataGridTextColumn Header="Last Name" ... /> </DataGrid.Columns> </DataGrid> <!--Show if business --> <DataGrid> <DataGrid.Columns> <DataGridTextColumn Header="Business Name" ... /> <DataGridTextColumn Header="Tax id" ... /> </DataGrid.Columns> </DataGrid> </DataGrid.RowDetailsTemplate> </DataGrid> Now I'm not sure if I need to use a Triggers or Behaviors to accomplish this? Thanks for everyones help! FYI I'm using Silverlight 4.0 with Prism.

  Read the article

< Previous Page | 298 299 300 301 302 303 304 305 306 307 308 309  | Next Page >