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• JDBC connection for a background thread being closed accessing in Websphere

  - by ferrari fan

  Hi, I have an application running in Websphere Portal Server inside of Websphere Application Server 6.0 (WAS). In this application for one particular functionality that takes a long time to complete, I am firing a new thread that performs this action. This new thread opens a new Session from Hibernate and starts performing DB transactions with it. Sometimes (haven't been able to see a pattern), the transactions inside the thread work fine and the process completes successfully. Other times however I get the errors below: org.hibernate.exception.GenericJDBCException: could not load an entity: [OBJECT NAME#218294] ... Caused by: com.ibm.websphere.ce.cm.ObjectClosedException: DSRA9110E: Connection is closed. Method cleanup failed while trying to execute method cleanup on ManagedConnection WSRdbManagedConnectionImpl@642aa0d8 from resource jdbc/MyJDBCDataSource. Caught exception: com.ibm.ws.exception.WsException: DSRA0080E: An exception was received by the Data Store Adapter. See original exception message: Cannot call 'cleanup' on a ManagedConnection while it is still in a transaction.. How can I stop this from happening? Why does it seem that WAS wants to kill my connections even though they're not done. Is there a way I can stop WAS from attempting to close this particular connection? Thanks

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• VB.NET error: Microsoft.ACE.OLEDB.12.0 provider is not registered [RESOLVED]

  - by Azim

  I have a Visual Studio 2008 solution with two projects (a Word-Template project and a VB.Net console application for testing). Both projects reference a database project which opens a connection to an MS-Access 2007 database file and have references to System.Data.OleDb. In the database project I have a function which retrieves a data table as follows private class AdminDatabase ' stores the connection string which is set in the New() method dim strAdminConnection as string public sub New() ... adminName = dlgopen.FileName conAdminDB = New OleDbConnection conAdminDB.ConnectionString = "Data Source='" + adminName + "';" + _ "Provider=Microsoft.ACE.OLEDB.12.0" ' store the connection string in strAdminConnection strAdminConnection = conAdminDB.ConnectionString.ToString() My.Settings.SetUserOverride("AdminConnectionString", strAdminConnection) ... End Sub ' retrieves data from the database Public Function getDataTable(ByVal sqlStatement As String) As DataTable Dim ds As New DataSet Dim dt As New DataTable Dim da As New OleDbDataAdapter Dim localCon As New OleDbConnection localCon.ConnectionString = strAdminConnection Using localCon Dim command As OleDbCommand = localCon.CreateCommand() command.CommandText = sqlStatement localCon.Open() da.SelectCommand = command da.Fill(dt) getDataTable = dt End Using End Function End Class When I call this function from my Word 2007 Template project everything works fine; no errors. But when I run it from the console application it throws the following exception ex = {"The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine."} Both projects have the same reference and the console application did work when I first wrote it (a while ago) but now it has stopped work. I must be missing something but I don't know what. Any ideas? Thanks Azim

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• Rails add a param to the end of a search query

  - by bob

  Hello, I am trying to implement a sort on the returned results of a search with rails. Filter by: 'recent' % | 'lowest_price' % | 'highest_price' % here are my links. I would like to add a filter to the end of my search query. So for example, I submit a search and I get back results and in my url I have http://localhost:3000/junks?search=handbag&condition=&category=&main_submit=Go! I would then like the user to be able to click one of the above links and have the page come back with a new query (i have this set up in the controller like such) con_id = params[:condition] if params[:category].nil? || params[:category].empty? cat_id = params[:category] results = Junk.search params[:search], :with => { :category_id => cat_id, :condition_id => con_id } case params[:filter] when "lowest_price" @junks = results.lowest_price.paginate :page => params[:page], :per_page => 12 when "highest_price" @junks = results.highest_price.paginate :page => params[:page], :per_page => 12 else @junks = results.paginate :page => params[:page], :per_page => 12 end else I would like the user to be able to click on of the above links and append a filter param to the end of the search query so that my controller can pick it up and call the correct database queries as seen in the case statement above. I'm guessing the url will look like this http://localhost:3000/junks?search=handbag&condition=&category=&main_submit=Go!&filter="lowest_price" How can I do this? Is there a better way?

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• Can I copy the CollapsiblePanelExtender in jQuery as one method?

  - by Matthew Jones

  I am beginning the process of moving away from the AjaxControlToolkit and toward jQuery. What I want to do is have one function that duplicates the functionality of the CollapsiblePanelExtender. For a particular set of hyperlink and div, the code looks like this: $('#nameHyperLink').click(function() { var div = $('#nameDiv'); var link = $('#nameHyperLink'); if (div.css('display') == 'none') { link.text('Hide Data'); div.show(400); } else { link.text('Show Data'); div.hide(400); } }); What I really want to do is only have to write this function once, then use it for many (approx 40) instances throughout my website. Ideally what I want is this: function showHidePanel(divID,linkID,showText,hideText){ var div = $(divID); var link = $(linkID); if (div.css('display') == 'none') { link.text('Hide Data'); div.show(400); } else { link.text('Show Data'); div.hide(400); } }); I would then call this function from every HyperLink involved using OnClientClick. Is there a way to do this?

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• SSIS Intermittent variable error: The system cannot find the file specified

  - by Ben

  Our SSIS pacakges a structured as one Control package and many child packages (about 30) that are invoked from the control package. The child packages are invoked with Execute Package Task. There is one Execute Package Task per child package. Each Execute Package Task uses File Connection Manager to specify path to the child package dtsx file. There is one File Connection Manager per child package. Each File Connection Manager has an expression defined for ConnectionString property. This expression looks like this: @[Template::FolderPackages]+"MyPackage.dtsx", the file name is different for each package. The variable (FolderPackages) is specified in the SSIS package configuration file. The error that is generated during run time is "Error 0x80070002 while loading package file "MyPackage.dtsx". The system cannot find the file specified." The package that fails is different from run to run and sometimes no packages fail at all. This is when run on exactly the same environment/data etc. I ran FileMon during this error and found out that when the error happens SSIS tries to read the dtsx file from a wrong place, namely from system32. I checked that this is identical to what would happen if @[Template::FolderPackages] variable were empty, but because the very same variable is used for every child package and works for some but doesn't work sometimes for others, I have no expalnation to this fact. Anything obvious, or time to raise a support call with Microsoft?

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• Create System.Data.Linq.Table in Code for Testing

  - by S. DePouw

  I have an adapter class for Linq-to-Sql: public interface IAdapter : IDisposable { Table<Data.User> Activities { get; } } Data.User is an object defined by Linq-to-Sql pointing to the User table in persistence. The implementation for this is as follows: public class Adapter : IAdapter { private readonly SecretDataContext _context = new SecretDataContext(); public void Dispose() { _context.Dispose(); } public Table<Data.User> Users { get { return _context.Users; } } } This makes mocking the persistence layer easy in unit testing, as I can just return whatever collection of data I want for Users (Rhino.Mocks): Expect.Call(_adapter.Users).Return(users); The problem is that I cannot create the object 'users' since the constructors are not accessible and the class Table is sealed. One option I tried is to just make IAdapter return IEnumerable or IQueryable, but the problem there is that I then do not have access to the methods ITable provides (e.g. InsertOnSubmit()). Is there a way I can create the fake Table in the unit test scenario so that I may be a happy TDD developer?

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• UDK SettingsScene variable

  - by Ricket

  I am in the process of porting a script from UT3 to UDK. The script is for class ZOUIFrontEnd_MainMenu extends UTUIFrontEnd_MainMenu. I'm getting the following compiler error: C:\UDK\UDK-2010-03\Development\Src\FixIt\Classes\ZOUIFrontEnd_MainMenu.uc(18) : Error, Bad or missing expression in Call to 'OpenSceneByName', parameter 1 The referenced line is as follows: OpenSceneByName(SettingsScene); Okay, so I figured the OpenSceneByName function changed in UDK. Tracing the path of inheritance all the way up to UDKUIScene.uc, I found the definition: function UIScene OpenSceneByName(string SceneToOpen, bool bSkipAnimation=false, optional delegate<OnSceneActivated> SceneDelegate=None) Assuming SettingsScene is a string, everything looks fine, right? So I figured I would find SettingsScene to make sure it's a string. Well doing a search for "SettingsScene" in all files turned up only one other line; UTGameReplicationInfo.uc line 334: UTPC.OpenUIScene(class'UTUIFrontEnd_MainMenu'.default.SettingsScene); But UTUIFrontEnd_MainMenu doesn't have a SettingsScene variable in it! Just to check, I changed my line of code to match: OpenSceneByName(class'UTUIFrontEnd_MainMenu'.default.SettingsScene); And indeed, I get the following compile error now: C:\UDK\UDK-2010-03\Development\Src\FixIt\Classes\ZOUIFrontEnd_MainMenu.uc(18) : Error, Unknown Property 'SettingsScene' in 'Class UTGame.UTUIFrontEnd_MainMenu' How does UTGameReplicationInfo.uc successfully compile? Where is the SettingsScene variable?

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• Session variables with Cucumber Stories

  - by Matthew Savage

  I am working on some Cucumber stories for a 'sign up' application which has a number of steps. Rather then writing a Huuuuuuuge story to cover all the steps at once, which would be bad, I'd rather work through each action in the controller like a regular user. My problem here is that I am storing the account ID which is created in the first step as a session variable, so when step 2, step 3 etc are visited the existing registration data is loaded. I'm aware of being able to access controller.session[..] within RSpec specifications however when I try to do this in Cucumber stories it fails with the following error (and, I've also read somewhere this is an anti-pattern etc...): Using controller.session[:whatever] or session[:whatever] You have a nil object when you didn't expect it! The error occurred while evaluating nil.session (NoMethodError) Using session(:whatever) wrong number of arguments (1 for 0) (ArgumentError) So, it seems accession the session store isn't really possible. What I'm wondering is if it might be possible to (and I guess which would be best..): Mock out the session store etc Have a method within the controller and stub that out (e.g. get_registration which assigns an instance variable...) I've looked through the RSpec book (well, skimmed) and had a look through WebRat etc, but I haven't really found an answer to my problem... To clarify a bit more, the signup process is more like a state machine - e.g. the user progresses through four steps before the registration is complete - hence 'logging in' isn't really an option (it breaks the model of how the site works)... In my spec for the controller I was able to stub out the call to the method which loads the model based on the session var - but I'm not sure if the 'antipattern' line also applies to stubs as well as mocks? Thanks!

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• Having problem dynamically invoking unmanaged VB COM dll from c#?

  - by Ramesh Vel

  I have a problem calling unmanaged VB COM dll from c#. This is dynamic invocation using loadLibrary and GetProcAddress. I can successfully loaded the dll using loadLibrary , but the GetProcAddress always return 0. It wasnt log any error msg and nothing. it just returns 0. below the sample code VB COM VERSION 1.0 CLASS BEGIN MultiUse = -1 Persistable = 0 DataBindingBehavior = 0 DataSourceBehavior = 0 MTSTransactionMode = 0 END Attribute VB_Name = "Sample" Attribute VB_GlobalNameSpace = False Attribute VB_Creatable = True Attribute VB_PredeclaredId = False Attribute VB_Exposed = True Option Explicit Private Attribute1 As String Private Sub Class_Initialize() Attribute1 = "test" End Sub Public Sub TestSub() End Sub Public Function testFunction() As String testFunction = "default.html" End Function Public Function SetData(XML As String) As String SetData = Date + Time End Function c# code static class UnManagedInvoker { [DllImport("kernel32.dll")] private static extern IntPtr LoadLibrary([MarshalAs(UnmanagedType.LPStr)] string dllToLoad); [DllImport("kernel32.dll")] private static extern IntPtr GetProcAddress(IntPtr hModule, [MarshalAs(UnmanagedType.LPStr)] string procedureName); [DllImport("kernel32.dll")] private static extern bool FreeLibrary(IntPtr hModule); [UnmanagedFunctionPointer(CallingConvention.Cdecl)] public delegate string MethodToInvoke(string sdata); public static string InvokeUnmanagedDll(string dllPath, string methodName) { IntPtr DIedDll = LoadLibrary(dllPath); IntPtr AddressOfFunction = GetProcAddress(DIedDll, methodName); MethodToInvoke MI = (MethodToInvoke)Marshal.GetDelegateForFunctionPointer(AddressOfFunction, typeof(MethodToInvoke)); string data = MI("ssdasda"); FreeLibrary(DIedDll); return data; } } And the calling code string res = UnManagedInvoker.InvokeUnmanagedDll("xx.dll","SetData"); Can someone help me out.. Update: I can successfully call the methods if the component is registered. using the below code Type Med = Type.GetTypeFromCLSID(new Guid("089DD8B0-E12B-439B-B52C-007CA72C93D0")); object MedObj = Activator.CreateInstance(Med); object[] parameter = new object[1]; parameter[0] = "asdasd"; var ss = Med.InvokeMember("SetData", System.Reflection.BindingFlags.InvokeMethod, null, MedObj, parameter); is there a way if the dll not registered.?

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• Assigning outcome of another JSTL tag as value of one JSTL tag

  - by NoozNooz42

  I've got this, which is working: <c:choose> <c:when test="${sometest}"> Hello, world! </c:when> <c:otherwise> <fmt:message key="${page.title}" /> </c:otherwise> </c:choose> And I want to change it to this: <c:choose> <c:when test="${sometest}"> <c:set var="somevar" scope="page" value="Hello, world!"/> </c:when> <c:otherwise> <c:set var="somevar" scope="page" value="<fmt:message key="${page.title}">" </c:otherwise> </c:choose But of course the following line ain't correct: <c:set var="somevar" scope="page" value="<fmt:message key="${page.title}">" How can I assign to the somevar variable the string resulting from a call to fmt:message?

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• Spaces and backslashes in Visual Studio build events

  - by gencha

  I have an application that is supposed to aid my project in terms of pre- and post-build event handling. I'm using ndesk.options for command line argument parsing. Which gave me weird results when my project path contains spaces. I thought this was the fault of ndesk.options but I guess my own application is to blame. I call my application as a post-built event like so: build.exe --in="$(ProjectDir)" --out="c:\out\" A simple foreach over args[] displays the following: --in=c:\my project" --out=c:\out" What happened is that the last " in each parameter was treated as if it was escaped. Thus the trailing backslash was removed. And the whole thing is treated as a single argument. Now I thought I was being smart by simply escaping the first " as well, like so: build.exe --in=\"$(ProjectDir)" --out=\"c:\out\" In that case the resulting args[] look like this: --path="c:\my project" --out="c:\out" The trailing backslash in the parameters is still swallowed and the first parameter is now split up. Passing this args[] to ndesk.options will then yield wrong results. How should the right command line look so that the correct elements end up in the correct args[] slots? Alternatively, how is one supposed to parse command line arguments like these with or without ndesk.options? Any suggestion is welcome. Thanks in advance

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• no statement parsed and wrong number or types of arguments - cfstoredproc

  - by Travis

  I have an Oracle procedure - editBacklog which I'm calling from a CFM page via cfstoredproc. After several changes to the procedure I started getting ORA-06550: line 1, column 7: PLS-00306: wrong number or types of arguments in call to 'EDITBACKLOG'. I've gotten this before and found that if I changed the name of the procedure it starts working again. I changed the name to editBacklog2 and it worked as I expected it to. I changed the name back to editBacklog and got the same error. I changed the name back to editBacklog2 again and started getting ORA-01003: no statement parsed. NOTHING has changed at this point except for the names. I changed the name yet again to editBacklog3 and it works as expected. As of right now editBacklog = ORA-06550 editBacklog2 = ORA-01003 editBacklog3 = works (kinda) This whole thing started when I was trying to fix an ORA-01821: date format not recognized error. I fear when I start changing things I'll start getting the same lame behavior described above. Either Oracle or CF is messing with me and I'll end up liking one of them less because of it. I assume it's probably cfstoredproc caching metadata or something but neither google, livedocs, or OTN have much to say about my situation. I'm not the SA or DBA. Anyone have any ideas?

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• Use the Django ORM in a standalone script (again)

  - by Rishabh Manocha

  I'm trying to use the Django ORM in some standalone screen scraping scripts. I know this question has been asked before, but I'm unable to figure out a good solution for my particular problem. I have a Django project with defined models. What I would like to do is use these models and the ORM in my scraping script. My directory structure is something like this: project scrape #scraping scripts ... test.py web django_project settings.py ... #Django files I tried doing the following in project/scrape/test.py: print os.path.join(os.path.abspath('..'), 'web', 'django_project') sys.path.append(os.path.join(os.path.abspath('..'), 'web', 'django_project')) print sys.path print "-------" os.environ['DJANGO_SETTINGS_MODULE'] = 'django_project.settings' #print os.environ from django_project.myapp.models import MyModel print MyModel.objects.count() However, I get an ImportError when I try to run test.py: Traceback (most recent call last): File "test.py", line 12, in <module> from django_project.myapp.models import MyModel ImportError: No module named django_project.myapp.models One solution I found around this problem is to create a symbolic link to ../web/govcheck in the scrape folder: :scrape rmanocha$ ln -s ../web/govcheck ./govcheck With this, I can then run test.py just fine. However, this seems like a hack, and more importantly, is not very portable (I will have to create this symbolic link everywhere I run this code). So, I was wondering if anyone has any better solutions for my problem?

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• Generic wrapper for System.Web.Caching.Cache functions

  - by David Neale

  I've created a generic wrapper for using the Cache object: public class Cache<T> where T : class { public Cache Cache {get;set;} public CachedKeys Key {get;set;} public Cache(Cache cache, CachedKeys key){ Cache = cache; Key = key; } public void AddToCache(T obj){ Cache.Add(Key.ToString(), obj, null, DateTime.Now.AddMinutes(5), System.Web.Caching.Cache.NoSlidingExpiration, System.Web.Caching.CacheItemPriority.Normal, null); } public bool TryGetFromCache(out T cachedData) { cachedData = Cache[Key.ToString()] as T; return cachedData != null; } public void RemoveFromCache() { Cache.Remove(Key.ToString()); } } The CachedKeys enumeration is just a list of keys that can be used to cache data. The trouble is, to call it is quite convuluted: var cache = new Cache<MyObject>(Page.Cache, CachedKeys.MyKey); MyObject myObject = null; if(!cache.TryGetFromCache(out myObject)){ //get data... cache.AddToCache(data); //add to cache return data; } return myObject; I only store one instance of each of my objects in the cache. Therefore, is there any way that I can create an extension method that accepts the type of object to Cache and uses (via Reflection) its Name as the cache key? public static Cache<T> GetCache(this Cache cache, Type cacheType){ Cache<cacheType> Cache = new Cache<cacheType>(cache, cacheType.Name); } Of course, there's two errors here: Extension methods must be defined in a non-generic static class The type or namespace name 'cacheType' could not be found This is clearly not the right approach but I thought I'd show my working. Could somebody guide me in the right direction?

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• Executing a modified expression

  - by Sam

  I found this brief demo: http://msdn.microsoft.com/en-us/library/bb546136.aspx Which discusses modifying an expression. However the code starts with a Expression<Func<string, bool>> and ends up with a Expression so it's not complete. How do I take that expression and make it typed as Expression<Func<string,bool>> again? All the examples I have have found on executing an expression all involve dynamically created expressions which is not what this case has. Here the original expression is defined at compile time. And the code I want to write to do this won't know much about the expression, ideally as little as possible. I definately can't see how I would know what "Paramaters" to pass to Expression.LambdaExpression... In my particular case I want to search for any references to a particular propery of type A and swap them out with a reference to a property of type B then pass the expression to a call to IEnumerable.Where. ie. p=>p.Name == "Sam" where P is Foo1 becomes p=>p.FirstName == "Sam" where p is Foo2

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• Fancybox "close" hangs/delays in IE7/8

  - by Kerri

  I'm having an issue with IE7/8 only on a development site: when closing the Fancybox, there is a major delay, sometimes about ten seconds or so, sometimes much longer (like a minute). Some things that might be relevant: • Using fancybox 1.3.1 • Works perfectly on all other browsers (FF, Safari, Opera, Chrome) • The loaded iframe contains a flash "virtual tour" • There are no errors reported in IE's Dev Toolbar or in DebugBar • The fancybox renders perfectly in IE, and after it has closed, there is not a problem loading it again. The closing seems to be the only issue. (That, and that it crashed the client's browser once, but I'm inclined to believe that had more to do with the content of the iframe than fancybox). I changed the link to the iFrame to something simpler (google), and it closed with no problem. So it does seem to have something to do with a conflict with the content of the iframe. The call: $("a#tourbox").fancybox({ "width": 750, "height" : 575, "autoScale": false, "type": "iframe" }); The HTML: <a id="tourbox" href="http://tour.circlepix.com/tour.htm?id=670335"><img src="sites/all/themes/removed/images/banquets-vtour.jpg" alt="Virtual Tour" /></a> Here's a link to the page with the problem: http://s93571.gridserver.com/banquets Click on the "Go to 360° Virtual Tour" image. Here's the page it loads: http://tour.circlepix.com/tour.htm?id=670335 I'd greatly appreciate any clues or ideas of what might be the issue. I couldn't find any other discussions with a similar problem. Thanks for any insights!

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• Detecting which MCUs to connect on an incoming conference

  - by Fábio Batista

  Hello, SO. I'm working with the OCS UCCAPI, developing a custom OCS client. I'm currently having a hard time detecting what "kind" of Conference my client is being invited to. Using the Office Communicator client, I can start "IM conferences" (by inviting more than 1 person and selecting "start a IM conversation") or "video conferences" (by selecting more than 1 person and selecting "start a video call"). The Office Communicator client, on the invitees' end, starts correctly the appropriate session (just IM, just Video or IM+Video). However, when receiving the conference invite on my custom client, there's no data about the kind of session I'm being invited. I need this information, in order to make a decision whether or not to connect to the AV MCU and capture/show video. I've tried already: When handling _IUccSessionManagerEvents.OnIncomingSession, parse the RemoteSessionDescription property on the UccIncomingInvitationEvent object: no luck, the only data about the conference modality is an element on the XML about the IM being enabled or not (<im available="true"> or <im available="false">), but nothing about the session having video available or not. When handling _IUccConferenceSessionEvents.OnEnter, check the Media property on the UccConferenceSession. Don't work, all media types are present (MESSAGE, AUDIO, VIDEO, DATA e TELEPHONY), regardless of the type of conference I'm being invited. Also when handling _IUccConferenceSessionEvents.OnEnter, check the Entities collection on the UccConferenceView object, to check which MCUs are enabled for this conference. Don't work either, all MUCs are listed as available (IM, AV, DATA and CONTROL), regardless of the type of conference I'm being invited. I'm running out of ideas. Some references I'm using: http://msdn.microsoft.com/en-us/library/bb664307.aspx http://msdn.microsoft.com/en-us/library/dd170830.aspx Thanks a lot.

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• Java Classpath Issues with Webservices(CXF) and Jboss

  - by JohnC

  I am using CXF(which autogenerates my webservices in my pom.xml from my wsdl) with JBoss(eclipse ide), and I am having some trouble accessing the webservice from my web application. I found this resource: http://blog.progs.be/?p=92 but I am having a really hard time using WSDL_LOCATION = cl.getResource( "my/progam/pack/wsdl/myService.wsdl" ); to work properly in my code. I have my wsdls located in src/main/wsdl and have added the following line to the .classpath file: classpathentry kind="src" path="src/main/wsdl" I also created the folders my,program,pack,wsdl and dropped my wsdls into that location, so it is accessible. However, the classloader.getResource call always returns null no matter what. When I specify getResource( "/wsdl/myService.wsdl" ) it does not return null, but I believe it looks at the full file path and not what I need (considering part of the URL contains the path to the wsdl file all the way through the jboss server directory and includes the WEB-INF dir. Is my .classpath file set up incorrectly or am I missing something else? if the WSDL Location is not correct it always throws a ClassCast Exception like so: java.lang.ClassCastException: org.apache.cxf.jaxws.ServiceImpl at javax.xml.ws.Service.(Service.java:81)

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• Post Loading ads - using appendChild to move an IFRAME with text link ads

  - by Prem

  I have changed code around to basically load an add the bottom of the page in a hidden div and attached an onload event handler that called document.getElementById(xxx).appendChild() to take the hidden ad and move it into the right spot in my page. This works GREAT.. however when the ad is a text ad it AFTER i move the ad there is nothing in the rendered Iframe. I did tests to see what it looks like before i move it and sure enough the text links load in the IFRAME but the second i do the appendChild call to move the div that contains the ad i seem to loose the contents of the Iframe. Any ideas whats going on <div id="myad" style="display: none;"> GA_googleFillSlot("MyADSlotName"); </div> <script> window.onload = function() { // leader board document.getElementById('adplaceholder').appendChild(document.getElementById('myAd')); document.getElementById('myAd').style.display = ''; </script> UPDATE: I think what the problem here is that on text ads google writes to the iframe directly inserting the relevant text links where are on other ads it uses the iframe to just point to some src. seems like when i do the appendchild, if there is no "src" set for the iframe after the copy is done the iframe in the new location contains nothing... guess it does a reload on the src? Any way around this??

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• WPF UI Automation - AutomationElement.FindFirst fails when there are lots of elements

  - by Orion Edwards

  We've got some automated UI tests for our WPF app (.NET 4); these test use the UI Automation API's. We call AutomationElement.FindFirst to find a target element, and then interact with it. Example (pseudocode): var nameEquals = new PropertyCondition(AutomationElement.NameProperty, "OurAppWindow"); var appWindow = DesktopWindow.FindFirst(TreeScope.Children, nameEquals); // this succeeds var idEquals = new PropertyCondition(AutomationElement.AutomationIdProperty, "ControlId"); var someItem = appWindow.FindFirst(TreeScope.Descendants, idEquals); // this suceeds sometimes, and fails sometimes! The problem is, the appWindow.FindFirst will sometimes fail and return null, even when the element is present. I've written a helper function which walks the UI automation tree manually and prints it out, and the element with the correct ID is present in all cases. It seems to be related to how many other items are also being displayed in the window. If there are no other items then it always succeeds, but when there are many other complex UI elements being displayed alongside it, then the find fails. I can't find any documented element limit mentioned for any of the automation API's - is there some way around this? I'm thinking I might have to write my own implemententation of FindFirst which does the tree walk manually itself... As far as I can tell this should work, because my tree-printer utility function does exactly that, and it's ok, but it seems like this would be unnecessary and slow :-( Any help would be greatly appreciated

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• Proving f (f bool) = bool

  - by Marcus Whybrow

  How can I in coq, prove that a function f that accepts a bool true|false and returns a bool true|false (shown below), when applied twice to a single bool true|false would always return that same value true|false: (f:bool -> bool) For example the function f can only do 4 things, lets call the input of the function b: Always return true Always return false Return b (i.e. returns true if b is true vice versa) Return not b (i.e. returns false if b is true and vice vera) So if the function always returns true: f (f bool) = f true = true and if the function always return false we would get: f (f bool) = f false = false For the other cases lets assum the function returns not b f (f true) = f false = true f (f false) = f true = false In both possible input cases, we we always end up with with the original input. The same holds if we assume the function returns b. So how would you prove this in coq? Goal forall (f:bool -> bool) (b:bool), f (f b) = f b.

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• Perl XML SAX parser emulating XML::Simple record for record

  - by DVK

  Short Q summary: I am looking a fast XML parser (most likely a wrapper around some standard SAX parser) which will produce per-record data structure 100% identical to those produced by XML::Simple. Details: We have a large code infrastructure which depends on processing records one-by-one and expects the record to be a data structure in a format produced by XML::Simple since it always used XML::Simple since early Jurassic era. An example simple XML is: <root> <rec><f1>v1</f1><f2>v2</f2></rec> <rec><f1>v1b</f1><f2>v2b</f2></rec> <rec><f1>v1c</f1><f2>v2c</f2></rec> </root> And example rough code is: sub process_record { my ($obj, $record_hash) = @_; # do_stuff } my $records = XML::Simple->XMLin(@args)->{root}; foreach my $record (@$records) { $obj->process_record($record) }; As everyone knows XML::Simple is, well, simple. And more importantly, it is very slow and a memory hog - due to being a DOM parser and needing to build/store 100% of data in memory. So, it's not the best tool for parsing an XML file consisting of large amount of small records record-by-record. However, re-writing the entire code (which consist of large amount of "process_record"-like methods) to work with standard SAX parser seems like an big task not worth the resources, even at the cost of living with XML::Simple. What I'm looking for is an existing module which will probably be based on a SAX parser (or anything fast with small memory footprint) which can be used to produce $record hashrefs one by one based on the XML pictured above that can be passed to $obj->process_record($record) and be 100% identical to what XML::Simple's hashrefs would have been. I don't care much what the interface of the new module is - e.g whether I need to call next_record() or give it a callback coderef accepting a record.

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• Google App Engine application instance recycling and response times...

  - by Konrad

  Hi, I posted this on GAE for Java group, but I hope to get some answers here quicker :) I decided to do some long-run performance tests on my application. I created some small client hitting app every 5-30 minutes and I run 3-5 of threads with such client. I noticed huge differenced in response times and started to investigate issue. I found reason very quick. I am experiencing same issues as described in following topics: Uneven response time between connection to server to first byte sent Application instances seem to be too aggressively recycled Getting 'Request was aborted after waiting too long to attempt to service your request.' after application idle I am using Springframework, it tkes around 18-20s to start app instance, which is causing response times to take from 1s (when requests hits running app - very rare) to 22s when fresh application is created. Is there any solution for this? I was thinking about creating most basic servlet performing critical tasks (serving API call) and leave UI as is. But then I would loose all benefits of Springframework. Is there any solution for this? After solving (hacking) numerous constrains of App Engine which I hit while developing my app that is the one I think will make me move out of App Engine... that's simply to much to all the time think how to win with GAE problems than how to solve my application problems... Any help? Regards Konrad

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• GWT: uiBinder-based widget cant be instanced second time

  - by Konoplianko

  Hi. I created a widget using GWT uiBinder. It works fine, till the moment when I want to instance it second time. After i call constructor second time it returns only raw description from XML and statements in constructor (rootElement.add( new HTML( "panel1" ), leftId );) are just don't work. It throws no error or warning. Please help Java class: public class DashboardLayout extends Composite { final String leftId = "boxLeft"; final String rightId = "boxRight"; interface DashboardLayoutUiBinder extends UiBinder<HTMLPanel, DashboardLayout> { } private static DashboardLayoutUiBinder ourUiBinder = GWT.create( DashboardLayoutUiBinder.class ); @UiField HTMLPanel htmlPanel; public DashboardLayout() { HTMLPanel rootElement = ourUiBinder.createAndBindUi( this ); this.initWidget( rootElement ); rootElement.add( new HTML( "panel1" ), leftId ); rootElement.add( new HTML( "panel2" ), rightId ); } } XML descriprion: <ui:UiBinder xmlns:ui='urn:ui:com.google.gwt.uibinder' xmlns:g='urn:import:com.google.gwt.user.client.ui' > <g:HTMLPanel ui:field="htmlPanel"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="40%" id="boxLeft" class="boxContextLeft"> </td> <td width="60%" id="boxRight" class="boxContextRight"> </td> </tr> </table> </g:HTMLPanel> </ui:UiBinder>

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• ez components and AWS PHP SDK makes ez components freak out

  - by David

  Hi, I try to work with ez Components and AWS PHP SDK at the same time. I have a file called resize.php which is just handling resizing images using the ez Components ImageTransition tools. I queue the image for resize in Amazon AWS SQS. If I load the AWS PHP SDK and ez Components in the same file, PHP always complains about not finding the ez Components classes. Code looks something like this: amazonSQS.php: require 'modules/resize.php'; require 'modules/aws/sdk.class.php'; $sqs = new AmazonSQS(); $response = $sqs->send_message($queue_url, $message); resize.php: function resize_image($filename) { $settings = new ezcImageConverterSettings( array( //new ezcImageHandlerSettings( 'GD', 'ezcImageGdHandler' ), new ezcImageHandlerSettings( 'ImageMagick', 'ezcImageImagemagickHandler' ), ) ); Error message: Fatal error: Class 'ezcImageConverterSettings' not found in /home/www.com/public_html/modules/resize.php on line 10 If I call resize.php from another PHP file which has AWS not included, it works fine. I load ezComponents like this: require 'ezc/Base/ezc_bootstrap.php'; It is installed as a PEAR package. Any idea someone?

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