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  • How to call a wpf singleton service within a wpf singleton service without hanging?

    - by Michael Hedgpeth
    I have two services, one that calls another. Both are marked as singletons as follows: [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode = ConcurrencyMode.Multiple)] public class Service : IService And I set these up with a ServiceHost as follows: ServiceHost serviceHost = new ServiceHost(singletonElement); serviceHost.Open(); When the parent service tries to call the child service on the same machine, the parent service hangs, waiting for the child service. I'm already considering moving away from the singleton model, but is there anything wrong with my approach? Is there an explanation for this behavior and a way out of it?

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  • smarter character replacement using ruby gsub and regexp

    - by agriciuc
    Hi guys! I'm trying to create permalink like behavior for some article titles and i don't want to add a new db field for permalink. So i decided to write a helper that will convert my article title from: "O "focoasa" a pornit cruciada, împotriva barbatilor zgârciti" to "o-focoasa-a-pornit-cruciada-impotriva-barbatilor-zgarciti". While i figured out how to replace spaces with hyphens and remove other special characters (other than -) using: title.gsub(/\s/, "-").gsub(/[^\w-]/, '').downcase I am wondering if there is any other way to replace a character with a specific other character from only one .gsub method call, so I won't have to chain title.gsub("a", "a") methods for all the UTF-8 special characters of my localization. I was thinking of building a hash with all the special characters and their counterparts but I haven't figured out yet how to use variables with regexps. What I was looking for is something like: title.gsub(/\s/, "-").gsub(*replace character goes here*).gsub(/[^\w-]/, '').downcase Thanks!

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  • Bloomberg APIv3 returning Slow Consumer Warnings!

    - by Marcus
    I made a program in c# based on the example "SubscriptionWithEventHandlerExample" of API 3.2.9.0. After subscribing to about 500 securities for realtime data, I receive some ADMIN event warnings claiming SlowConsumerWarning and SlowConsumerWarningCleared. I read somewhere that it introduces some delay, until I process all events. The problem is that in my code I only receive callbacks from bloomberg. The event queue isn´t even in my program! Some things that I tried: 1) raise the queue limit, setting MaxEventQueueSize in the session options (seems to have no effect) 2) see if I get any timeout event (no, I don't get any) 3) create multiple sessions and subscribing 50 securities in each (now I get multiple warnings, one for each thread) Is there something that I can do or this behavior is out of my scope?

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  • C# Linq Entity Conversion Error on Nonexistent Value?

    - by Ryan
    While trying to query some data using the Linq Entity Framework I'm receiving the following exception: {"Conversion failed when converting the varchar value '3208,7' to data type int."} The thing that is confusing is that this value does not even exist in the view I am querying from. It does exist in the table the view is based on, however. The query I'm running is the following: return context.vb_audit_department .Where(x => x.department_id == department_id && x.version_id == version_id) .GroupBy(x => new { x.action_date, x.change_type, x.user_ntid, x.label }) .Select(x => new { action_date = x.Key.action_date, change_type = x.Key.change_type, user_ntid = x.Key.user_ntid, label = x.Key.label, count = x.Count(), items = x }) .OrderByDescending(x => x.action_date) .Skip(startRowIndex) .Take(maximumRows) .ToList(); Can somebody explain why LINQ queries the underlying table instead of the actual view, and if there is any way around this behavior?

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  • pdf errors with php, apache2

    - by julio
    Hi-- I'm seeing some strange behavior from some dynamically generated PDFs using the TCPDF library in PHP. Standard lamp stack-- however, if you try to open the PDF from Windows with Acrobat Reader, it gives an error that the "file is damaged and could not be repaired". From Mac, Linux, etc. the file works fine, and opens fine. It also opens fine in Google Docs-- so clearly the PDF itself is ok. Is it possible that the mime type (application/pdf) is causing problems in Windows? Thanks

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  • Passing unknown classes to String Streams in C++

    - by Sqeaky
    I am using a template function and I am passing and I may be sending instances of a variety of classes to a string stream. What can I do to make sure this continues to work? Let me be more specific where do I define the behavior for this? Is there some member that should be on each class being sent to the string stream, should I in some enhance or extend the existing String stream (I was thinking building a class that inherits from sstream and overloads the << operator to handle all the possible classes)? I had trouble even finding documentation on this, so even links to more resources would be helpful.

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  • Why is Magento 1.4 including javascript files by filesystem path?

    - by Josh
    I am in the process of testing a Magento 1.3 site using Magento 1.4. I am seeing very weird and inconsistent behavior. Instead of including the URL of my javascript files, Magento is creating tags with the full filesystem path of the js files, as so: <script type="text/javascript" src="/home/my_username/public_html/js/prototype/prototype.js"></script> I believe this is related to the new "Themes JavaScript and CSS files combined to one file" function. In fact, when I log into the admin and click "Flush JavaScript/CSS Cache", then the first page load is successful, and I see a single JS include similar to: <script type="text/javascript" src="/media/js/5b8cfac152fcb2a5f93ef9571d338c54.js"></script> But subsequent age loads load every single JS file, with the full path names. Which obviously isn't going to work. Anyone have any ideas on what could be wrong or how to fix this issue?

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  • msmq binding wcf

    - by pdiddy
    I have some messages in my queue. Now I notice that after 3 tries the service host faults. Is this a normal behavior? Where does the 3 times comes from? I thought it came from receiveRetryCount. But I set that one to 1. I got 20 messages in my queue waiting to be processed. The WCF operation that is responsible to process the message supports transaction so if it can't process the message it will throw so that the message stays in the queue. I didn't think that it would of Fault the ServiceHost after a number of retry, is this part documented somewhere? I'm running MSMQ service on my winxp machine. I'm more interested in documentation indicating that the service host will fault after a number of retry. Is this part true?

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  • IIS website is sending multiple content-type headers for zip files

    - by frankadelic
    We have a problem with an IIS5 server. When certain users/browsers click to download .zip files, binary gibberish text sometimes renders in the browser window. The desired behavior is for the file to either download or open with the associated zip application. Initially, we suspected that the wrong content-type header was set on the file. The IIS tech confirmed that .zip files were being served by IIS with the mime-type "application/x-zip-compressed". However, an inspection of the HTTP packets using Wireshark reveals that requests for zip files return two Content-Type headers. Content-Type: text/html; charset=UTF-8 Content-Type: application/x-zip-compressed Any idea why IIS is sending two content-type headers? This doesn't happen for regular HTML or images files. It does happen with ZIP and PDF. Is there a particular place we can ask the IIS tech to look? Or is there a configuration file we can examine?

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  • Is there a way to watch all COM activity on a computer?

    - by Fake Name
    I'm trying to deal with a piece of specialized hardware, that presents it's interface as a COM object, using win32com in Python. However, the documentation for how to actually set up the hardware through the COM object is sparse (it requires a significant amount of initialization), and entirely oriented at using a bunch of pre-built libraries for Visual Studio, which are not accessible through python. That said, is there any way to watch all local COM activity, so I can sort through the activity logs to try and figure out how the existing demo programs properly initialize the hardware, and replicate the behavior in my python script? Ideally, there would be something in the vein of wireshark for doing this. Note: I have very little (read: basically no) experience using COM, as my focus is mostly embedded hardware (and a little python dev on the side). However, I'm stuck with this particular device.

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  • Lexical and dynamic scoping in Mathematica: Local variables with Module, With, and Block

    - by dreeves
    The following code returns 14 as you'd expect: Block[{expr}, expr = 2 z; f[z_] = expr; f[7]] But if you change that Block to a Module then it returns 2*z. It seems to not matter what other variables besides expr you localize. I thought I understood Module, Block, and With in Mathematica but I can't explain the difference in behavior between Module and Block in this example. Related resources: Tutorial on Modularity and the Naming of Things from the Mathematica documentation Excerpt from a book by Paul R. Wellin, Richard J. Gaylord, and Samuel N. Kamin Explanation from Dave Withoff on the Mathematica newsgroup

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  • Modal View Controller with keyboard on landscape iPad changes location when dismissed

    - by Roi
    I present a modal view controller on my on my iPad with UIModalPresentationFormSheet presentation style and UIModalTransitionStyleCoverVertical transition style. The Modal View Controller contains a UIWebView with some TextFields on it. When the user taps one of the text fields the keyboard comes up. I have noticed that in landscape mode after the keyboard is shown, if I try to dismiss the modal view controller with animation the view changes its position from the center of the screen to the left side just before the animation starts.. This happens only if the keyboard is up and only in landscape mode on the iPad. If the user closes the modal view without pressing on any text field this doesn't happen. Anyone familiar with this strange behavior?

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  • how to write re-usable views in django?

    - by rz
    These are the techniques that I use regularly to make my views reusable: take the template_name as an argument with a default take an optional extra_context which defaults to empty {} right before the template is rendered the context is updated with the extra_context for further re-usability, call any callable in extra_context.values() whenever the view deals with a queryset, there is a queryset argument with a default whenever the view needs a particular object from the ORM, it attempts to fetch it using any "id" parameter in several ways (e.g. as a slug, as a database id) (this may be a bad practice...) First, Should I add anything to my list? Should I remove anything from my list? The items accommodates a large number of cases. However, whenever an app extends a model of another in some way (e.g. adding a field or changing the behavior in some way) I end up writing my own views and only reusing the model. Is this normal?

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  • Drupal - no self-linking

    - by pygorex1
    So, I've added several pages to my Drupal install and linking to the pages using URL aliases via the Path module. So far so good - http://mydrupal/node/1 becomes http://mydrupal/about which is exactly what I'm looking for. Then I'm adding these links to the primary navigation and outputting the primary links via a custom theme (copy and paste the primary link code from the Chameleon theme). Here's the problem: when viewing http://mydrupal/about the page links to itself - that is the "About" link at http://mydrupal/about is still linking to http://mydrupal/about - the behavior I'm looking for is to have the "About" text display without a link. In summary: how do I prevent self-linking of pages when displaying the primary navigation?

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  • strange messages in log file @^@^@^@^@^@^@^@^@^@^@^@^@^@^@^....

    - by celalo
    Hello, I have a application server for network operations written with JAVA based on Apache Mina. Recently I encounter a strange behavior in my log files. I noticed that the log file is full of @^@^@^@^@^@^@^@^@^@^@^@^.... characters. I mean those unexpected characters are vast amount of as such the log file gets hundreds of GB in a couple of hours! I have no clue about this problem and it is almost impossible to google it. What could be the reason? Are those set of characters any familiar to anybody? I can give more details about the application if needed. Thanks in advance.

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  • Editable QTreeView with expandable cells

    - by serge
    Hi everyone, I tried to write an editable table based on QTreeView with wordwraped content in cells which in turn should expand in height (that whole text was visible) like usual cells in tables like in MSWord, but have met insuperable obstacles: first - i can't set fixed cell size. second - i can't make text display in cells wordwraped. For this i used void QTreeWidget::setItemWidget ( QTreeWidgetItem * item, int column, QWidget * widget ), but it works only for readonly solutions. And i haven't come up with any other idea. Can such behavior of QTreeView be realized? And how to solve those problems of mine? Thanks in advance Serge

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  • tableview - unrecognized selector sent to instance

    - by ct2k7
    Hi, I'v just got this error in my app. 2010-04-06 03:58:55.463 EasyPay DPS[6530:207] WARNING: Using legacy cell layout due to delegate implementation of tableView:accessoryTypeForRowWithIndexPath: in <NTItems: 0x397af90>. Please remove your implementation of this method and set the cell properties accessoryType and/or editingAccessoryType to move to the new cell layout behavior. This method will no longer be called in a future release. 2010-04-06 03:58:55.505 EasyPay DPS[6530:207] *** -[NTItems tableView]: unrecognized selector sent to instance 0x397af90 2010-04-06 03:58:55.515 EasyPay DPS[6530:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NTItems tableView]: unrecognized selector sent to instance 0x397af90' This error is extremely unuseful - where do I start in my code?

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  • how do i add two delegates to a ui element at run time?

    - by Michael Xu
    Hi everyone, im trying to implement some behaviors when a mapview element scrolls... by coding a delegate for the scrollview inside of a mapview. so, right now, i got a pointer to the scroll view used by the map view in my code. however, i wish to set the delegate of this scroll view inside the map view, but the issue is that the mapview already sets up a default delegate for this scroll view inside the map view. can i make my delegate implement all of the messages of the protocol, explicitly sending them to the mapview's default delegate while also implementing my own behaviors? how else can i go about adding my own delegate behavior, to an already existing default delegate....? thanks everyone, michael

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  • Is yield break equivalent to returning Enumerable<T>.Empty from a method returning IEnumerable<T>

    - by Mike Two
    These two methods appear to behave the same to me public IEnumerable<string> GetNothing() { return Enumerable.Empty<string>(); } public IEnumerable<string> GetLessThanNothing() { yield break; } I've profiled each in test scenarios and I don't see a meaningful difference in speed, but the yield break version is slightly faster. Are there any reasons to use one over the other? Is one easier to read than the other? Is there a behavior difference that would matter to a caller?

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  • jQuery Cycle Plugin: How to preload first images with a loading background gif then fade in Cycle Sl

    - by Theo Ribeiro
    Hello all, I'm struggling with this, maybe some of you can help... I have a home page slideshow with large images at www.theoribeiro.com using jQuery Cycle plugin Images are large and sometimes with slow connections (but even in fast ones) the behavior of the slideshow start is pretty ugly, showing the image all of a sudden or half-loaded. I want to make sure that at least the 2 or 3 first images are loaded before the slideshow starts and meanwhile I want to run a loading animated gif, then I want to fade in the first image. I searched a lot on the internet and on the forums and tried loads of stuff with my limited knowledge of javascript and jQuery but could't come up with a solution. Any help would be greatly appreciated!!!

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  • Does anyone know how to create a message bubble with 2 buttons appears on top of an overlayitem for

    - by Zap
    I currently have implemented an overlayitem that shows an icon for geopoint on a map application in Android. When the icon is clicked, it brings up an AlertDialog from the onTap method below. I have the following questions: Does anyone know how to display a map message bubble directly above the icon overlayitem with 2 callout buttons one to the left of the title and one to the right of the bubble? Does anyone know how to make the overlayitem draggable so I can press and hold it and drag it across the map. I am trying to duplicate the draggable icon behavior that's available on the iPhone. If so, please share some sample code. Thanks protected boolean onTap(int index) { OverlayItem item = mOverlays.get(index); AlertDialog.Builder dialog = new AlertDialog.Builder(mContext); dialog.setTitle(item.getTitle()); dialog.setMessage(item.getSnippet()); dialog.show(); return true; }

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  • Assistance using respond_to to find the right actions to render PDF in ruby on rails

    - by Angela
    Hi, I am trying out Prince with the Princely plugin, which is supposed to format templates that have the .pdf into a PDF generator. Here is my controller: class TodoController < ApplicationController def show_date @date = Date.today @campaigns = Campaign.all @contacts = Contact.all @contacts.each do |contact| end respond_to do |format| format.html format.pdf do render :pdf => "filename", :stylesheets => ["application", "prince"], :layout => "pdf" end end end end I changed the routes.db to include the following: map.connect ':controller/:action.:format' map.todo "todo/today", :controller => "todo", :action => "show_date" My expected behavior is when I enter todo/today.pdf, it tries to execute show_date, but renders according to the princely plugin. Right now, it says cannot find action. What do I need to do to fix this?

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  • How to change eclipse plugin's default parent-first classloader policy to child-first classloader po

    - by deepthinker121
    Hi All, I want to change the behavior of eclipse's parent-first classloader policy to child-first classloader policy. The scenario would be : Plugin A has class C in dependent external jar. When the classloader of the jar looks for "META-INF" folder - it should find the META-INF folder of the jar and not the one found by its parent classloader - that is the plugin A's META-INF folder. So I want to change the classloader policy to 'child-first' rather than 'parent-first' Is it possible to do this by changing the plugin A's Manifest or plugin.xml?

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  • Google datastore stats

    - by Keyur
    I am querying the __Stat_Kind__ kind. It does not return me entities about kinds that currently exist in the datastore but it includes entities about kinds that I had deleted more than a week ago. I am not so much concerned about it returning me the non-existent kinds - the doc does mention this scenario after all. But I am concerned that it does not return me info about my current kinds. Is this a known issue or am I doing something wrong? To folks on the app engine team: Also, on the dev server neither __Stat_Kind__ nor __Stat_Total__ return any entities. Which means I need to deploy my app to appspot before I can test this behavior. It would be nice if the dev server did return some basic info. Thanks, Keyur

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  • Unbelievable: Cannot cast from class X to its super class

    - by Phuong Nguyen de ManCity fan
    I'm encountering a very weird problem with Spring (3.0.1.RELEASE), TestNG (5.11) and Maven Surefire (2.5). I have a test class that extends a Spring helper class for testNG so that test context can be loaded from an xml file (that contains some bean definitions). My project was imported into eclipse using m2eclipse (using Import Maven Project) The class run fine in Eclipse TestNG runner. However, it throws this exception with Maven Surefire Caused by: java.lang.ClassCastException: com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl cannot be cast to javax.xml.parsers.DocumentBuilderFactory at javax.xml.parsers.DocumentBuilderFactory.newInstance(DocumentBuilderFactory.java:123) at org.springframework.beans.factory.xml.DefaultDocumentLoader.createDocumentBuilderFactory(DefaultDocumentLoader.java:89) at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:70) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:388) I have eliminated all involved dependencies in my pom so that the two classes com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl and javax.xml.parsers.DocumentBuilderFactory are coming from JRE only (the rt.jar). So, it looks so unbelievable to me. I wonder if there is any mechanism in loading class that can explain for this behavior? Thanks.

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