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• Notifying view controller when subview touch events occur.

  - by Nebs

  I have a UIViewController whose view has a custom subview. This custom subview needs to track touch events and report swipe gestures. Currently I put touchesBegan, touchesMoved, touchesEnded and touchesCancelled in the subview class. With some extra logic I am able to get swipe gestures and call my handleRightSwipe and handleLeftSwipe methods. So now when I swipe within the subview it calls its local swipe handling methods. This all works fine. But what I really need is for the handleRightSwipe and handleLeftSwipe methods to be in the view controller. I could leave them in the subview class but then I'd have to bring in all the logic and data as well and that kind of breaks the MVC idea. So my question is is there a clean way to handle this? Essentially I want to keep my touch event methods in the subview so that they only trigger for that specific view. But I also want the view controller to be informed when these touch events (or in this case swipe gestures) occur. Any ideas? Thanks.

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• Improve XPath efficiency for repeated, parameterized queries

  - by Chris Allan

  Hi, I am repeatedly performing the following XPath query (though parameterized by 'keywordText') around 40,000 times: String query = SystemGlobal.YAHOO_KEYWORDSSUBNODE + "/" + SystemGlobal.YAHOO_KEYWORDNODE + "[" + SystemGlobal.YAHOO_ATTRKEYPHRASE + "='" + keywordText + "']"; CachedXPathAPI cachedXPathAPI = new CachedXPathAPI(); NodeIterator nl = cachedXPathAPI.selectNodeIterator(doc.getElementsByTagName(SystemGlobal.YAHOO_KEYWORDSROOT).item(0), query); Node n; if ((n = nl.nextNode()) != null) { keyword.setKeywordId(Long.parseLong(cachedXPathAPI.selectSingleNode(n, SystemGlobal.YAHOO_ATTRKEYID).getTextContent())); keyword.setKeyPhrase(cachedXPathAPI.selectSingleNode(n, SystemGlobal.YAHOO_ATTRKEYPHRASE).getTextContent()); keyword.setStatus(mapStatus(cachedXPathAPI.selectSingleNode(n, SystemGlobal.YAHOO_ATTRSTATUS).getTextContent())); keyword.setCampaignId(Long.parseLong(cachedXPathAPI.selectSingleNode(n, "../../" + SystemGlobal.YAHOO_ATTRCAMPAIGNID).getTextContent())); keyword.setAdGroupId(Long.parseLong(cachedXPathAPI.selectSingleNode(n, "../" + SystemGlobal.YAHOO_ATTRADGROUPID).getTextContent())); On the first run of the script, all 40,000 runs of this piece of code will have nl.nextNode() == null, and everything runs quite quickly. However, on the following runs, when nl.nextNode() != null, then things slow down a lot - this takes around an additional 40min to run (whereas the first run takes maybe 1 minute). Oh, and the doc is constructed like so: InputSource in = new InputSource(new FileInputStream(filename)); DocumentBuilderFactory dfactory = DocumentBuilderFactory.newInstance(); dfactory.setNamespaceAware(true); doc = dfactory.newDocumentBuilder().parse(in); I tried including the following lines reportEvaluator = new XPathEvaluatorImpl(reportDoc); reportResolver = reportEvaluator.createNSResolver(reportDoc); and rather creating a NodeIterator, instead creating an XPathResult: XPathResult result = (XPathResult)reportEvaluator.evaluate(query, doc.getElementsByTagName(SystemGlobal.YAHOO_KEYWORDSROOT).item(0), reportResolver, XPathResult.UNORDERED_NODE_ITERATOR_TYPE, null); however this ran even slower Is there a way in which I can speed up the running of this script? I have seen references to precompiled queries, though I haven't seen many actual details. Also, as seen in the code, I am using CachedXPathAPI, though the benefit for this case is not so great. Any help is much appreciated! Chris Allan

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• Need help regarding one LALR(1) parsing.

  - by AppleGrew

  I am trying to parse a context-free language, called Context Free Art. I have created its parser in Javascript using a YACC-like JS LALR(1) parser generator JSCC. Take the example of following CFA (Context Free Art) code. This code is a valid CFA. startshape A rule A { CIRCLE { s 1} } Notice the A and s in above. s is a command to scale the CIRCLE, but A is just a name of this rule. In the language's grammar I have set s as token SCALE and A comes under token STRING (I have a regular expression to match string and it is at the bottom of of all tokens). This works fine, but in the below case it breaks. startshape s rule s { CIRCLE { s 1} } This too is a perfectly valid code, but since my parser marks s after rule as SCALE token so it errors out saying that it was expecting STRING. Now my question is, if there is any way to re-write the production rules of the parser to account for this? The related production rule is:- rule: RULE STRING '{' buncha_replacements '}' [* rule(%2, 1) *] | RULE STRING RATIONAL '{' buncha_replacements '}' [* rule(%2, 1*%3) *] ; One simple solution I can think of is create a copy of above rule with STRING replaced by SCALE, but this is just one of the many similar rules which would need such fixing. Furthermore there are many other terminals which can get matched to STRING. So that means way too many rules!

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• solr JOIN query

  - by Sfairas

  I need to run a JOIN query on a solr index. I've got two xmls that I have indexed, person.xml and subject.xml. Person: <doc> <field name="id">P39126</field> <field name="family">Smith</field> <field name="given">John</field> <field name="subject">S1276</field> <field name="subject">S1312</field> </doc> Subject: <doc> <field name="id">S1276</field> <field name="topic">Abnormalities, Human</field> </doc> I need to only display information from the person doc but each query should match fields in both person and subject. In the case the query matches only the subject doc I need to display all docs from the person that have a matching id. Is this possible to do without running two seperate queries? Something like a JOIN query would do the job. Any help?

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• Complex Types, ModelBinders and Interfaces

  - by Kieron

  Hi, I've a scenario where I need to bind to an interface - in order to create the correct type, I've got a custom model binder that knows how to create the correct concrete type (which can differ). However, the type created never has the fields correctly filled in. I know I'm missing something blindingly simple here, but can anyone tell me why or at least what I need to do for the model binder to carry on it's work and bind the properties? public class ProductModelBinder : DefaultModelBinder { override public object BindModel (ControllerContext controllerContext, ModelBindingContext bindingContext) { if (bindingContext.ModelType == typeof (IProduct)) { var content = GetProduct (bindingContext); return content; } var result = base.BindModel (controllerContext, bindingContext); return result; } IProduct GetProduct (ModelBindingContext bindingContext) { var idProvider = bindingContext.ValueProvider.GetValue ("Id"); var id = (Guid)idProvider.ConvertTo (typeof (Guid)); var repository = RepositoryFactory.GetRepository<IProductRepository> (); var product = repository.Get (id); return product; } } The Model in my case is a complex type that has an IProduct property, and it's those values I need filled in. Model: [ProductBinder] public class Edit : IProductModel { public Guid Id { get; set; } public byte[] Version { get; set; } public IProduct Product { get; set; } }

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• problems with scrolling a java TextArea

  - by Jonathan

  All, I am running into an issue using JTextArea and JScrollPane. For some reason the scroll pane appears to not recognize the last line in the document, and will only scroll down to the line before it. The scroll bar does not even change to a state where I can slide it until the lines in the document are two greater than the number of lines the textArea shows (it should happen as soon as it is one greater). Has anyone run into this before? What would be a good solution (I want to avoid having to add an extra 'blank' line to the end of the document, which I would have to remove every time I add a new line)? Here is how I instantiate the TextArea and ScrollPane: JFrame frame = new JFrame("Java Chat Program"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Container pane = frame.getContentPane(); if (!(pane.getLayout() instanceof BorderLayout)) { System.err.println("Error: UI Container does not implement BorderLayout."); System.exit(-1); } textArea = new JTextArea(); textArea.setPreferredSize(new Dimension(500, 100)); textArea.setEditable(false); textArea.setLineWrap(true); textArea.setWrapStyleWord(true); JScrollPane scroller = new JScrollPane(textArea); scroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS); pane.add(scroller, BorderLayout.CENTER); Here is the method I use to add a new line to textArea: public void println(String a) { textArea.append(" "+a+"\n"); textArea.setCaretPosition(textArea.getDocument().getLength()); } Thanks for your help, Jonathan EDIT: Also, as a side note, with the current code I have to manually scroll down. I assumed that setCaretPosition(doc.getLength()) in the println(line) method would automatically set the page to the bottom after a line is entered... Should that be the case, or do I need to do something differently?

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• Can I convert an ASCII MD5 hashed password into a Unicode MD5 hashed password?

  - by Jimmy Moo Moo

  Hello, I'm looking for help to convert an ASCII MD5 hashed password into a Unicode MD5 hashed password? For example, I'll use the string "password" . When it's converted to an ascii byte array, I get a base64 encoded hash of X03MO1qnZdYdgyfeuILPmQ== When it's converted into a unicode byte array, I get a base64 encoded hash of sIHb6F4ew//D1OfQInQAzQ== All my passwords are stored in an md5 hash that was applied to an ascii byte array, but I'm trying to migrate my application's user data to a system that stores password in an md5 hash that is applied a unicode byte array. In case it's not clear, with the following C#code: var passwordBytes = Encoding.ASCII.GetBytes("password"); var hashAlgorithm = HashAlgorithm.Create("MD5"); var hashBytes = hashAlgorithm.ComputeHash(passwordBytes); My current system uses this, but the system I'm moving to has a diff first time. It usese Encoding.Unicode.GetBytes. Does anybody know how I can convert my passwords? From X03MO1qnZdYdgyfeuILPmQ== into sIHb6F4ew//D1OfQInQAzQ== I'm guessing the answer is that I can't.. the encoding is being done before the hashing, but I thought I'd inquire the bright minds of stackoverflow and see if anybody has a way.

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• NSURL URLWithString: raises exception

  - by Stephen Darlington

  In short, [NSURL URLWithString:] appears to be raising an exception. According to the documentation "If the string was malformed, returns nil." There is no mention of an exception being raised under any circumstance. In addition to this, I am both encoding the URL and checking for nil before converting the string to a URL. Can anyone offer any advice as to which exception it could be or what other error checking I should be doing before converting the URL? In case you're interested in the details, the calling code looks like this: NSString* tmpText = [newUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; if (tmpText == nil) { // error handling } else { NSURL* tmpURL = [NSURL URLWithString:tmpText]; And this is a section from the crash report download from iTunes Connect: 8 libobjc.A.dylib 0x300c1f84 objc_exception_throw 9 CoreFoundation 0x3029a598 +[NSException raise:format:arguments:] 10 CoreFoundation 0x3029a538 +[NSException raise:format:] 11 Foundation 0x30696dde -[NSURL initWithString:relativeToURL:] 12 Foundation 0x30696cd8 +[NSURL URLWithString:relativeToURL:] 13 Foundation 0x30696cae +[NSURL URLWithString:] 14 Yummy 0x000146ca -[DeliciousPostCell setUrl:] + 46 It seems that the URL was in a "bad" format somehow but that should really be returning a nil not an exception. I have never seen the exception being raised myself so I can't use XCode to trap the code and see what's happening. And the user(s) that experienced the problem never contacted me directly so I can't ask for more details. Any suggestions greatly appreciated. Update (14/7/2009): Seems like such a hack, but I added an exception block around the suspect line. I also raised a Radar bug report (#7031551) suggesting that the code should match the documentation.

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• Sort multiple columns while using a bindingsource or bindinglist

  - by JF

  Hi everyone. I have a problem I am trying to fix and it's sorting a DataGridView on multiple columns. I have read that this option is not a feature built-in the DataGridView and I have to implement it. I have found multiple solutions, but none quite got to do the work. I'm also quite a newbie in C# and I don't know much of the .Net library. I have also read on the MSDN site for info on different classes that might be of use, but no success. Now, let's get to the point. I have a DataGridView, with a BindingList (originally, a BindingSource) that I want to sort, but by multiple keys. My DataGrid has 9 columns and the user should be able to sort on any column. For example, let's say my Datagrid has 3 columns, named : Index, ID, Name. The user wants to sort by Name, implicitly, the next order would be Index and then ID. So, in case 2 names are identical, Index should be the next sort option. Any ideas how this can be made?

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• HTML5 video (mp4 and ogv) problems in Safari and Firefox - but Chrome is all good

  - by qryss

  Hi folks, I have the following code: <video width="640" height="360" controls id="video-player" poster="/movies/poster.png"> <source src="/movies/640x360.m4v" type='video/mp4; codecs="avc1.42E01E, mp4a.40.2"'> <source src="/movies/640x360.ogv" type='video/ogg; codecs="theora, vorbis"'> </video> I'm using Rails (Mongrel in development and Mongrel+Apache in production). Chrome (Mac and Win) can play either file (tested by one then the other source tags) whether locally or from my production servers. Safari (Mac and Win) can play the mp4 file fine locally but not from production. Firefox 3.6 won't play the video in either OS. I just get a grey cross in the middle of the video player area. I've made sure that both Mongrel and Apache in each case have the right MIME types set. From Chrome's results I know there is nothing inherently wrong with my video files or the way the files are being asked for or delivered. Anyone got any clues? Or even a clue as to how to diagnose the problem? For Firefox I looked at https://developer.mozilla.org/En/Using_audio_and_video_in_Firefox where it refers to an 'error' event and an 'error' attribute. It seems the 'error' event is thrown pretty well straightaway and at that time there is no error attribute. Very helpful... :( Help enormously appreciated! Thanks in advance... Chris

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• ExtJS: dynamically ajust layout after adding/removing some form fields

  - by Sergei Stolyarov

  I have form layout with some TextField elements and one HtmlEditor element. Some TextField elements are "hideable", i.e. could be hid or showed. After hiding/showing elements HtmlEditor instance break layout — there appear empty space or element doesn't end at the window border. Is it possible to tell to HtmlEditor instance use all remaining available space? Even in case when some elements are hidden/showed. I've tried to use anchor property, but it works well until some element removed from the layout. Updated Here is a sample code: var htmlEditor = new Ext.form.HtmlEditor({ anchor: '100% -54', hideLabel: true }); var fp = new Ext.form.FormPanel({ items: [{xtype: 'textfield', fieldLabel: 'zzz', mode: 'local'}, {xtype: 'textfield', fieldLabel: 'nnn', id: 'id-one', mode: 'local'}, htmlEditor] }); var w = new Ext.Window({layout: 'fit', height: 400, width: 600, tbar: [{text: 'click', handler: function() { // hide element Ext.getCmp('id-one').getEl().up('.x-form-item').setDisplayed(false); w.doLayout(); } }], items: fp }); w.show(); Execute, click toolbar button "click", one field should disappear, then look at empty space below htmleditor.

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• PHPUnit installed but class PHPUnit_TestCase not found

  - by Greg K

  Talk about falling at the first hurdle. My test script: <?php require_once('PHPUnit/Framework.php'); class TransferResponseTest extends PHPUnit_TestCase { ... } Running my test case: $ phpunit TransferResponseTest Fatal error: Class 'PHPUnit_TestCase' not found in /Volumes/Data/greg/code/syndicate/tests/TransferResponseTest.php on line 5 $ php -i | grep include_path include_path => .:/usr/lib/php => .:/usr/lib/php $ ls -l /usr/lib/php/PHPUnit/ total 8 drwxr-xr-x 16 root wheel 544 27 Mar 19:03 Extensions drwxr-xr-x 28 root wheel 952 27 Mar 19:03 Framework -rw-r--r-- 1 root wheel 3193 27 Mar 19:03 Framework.php drwxr-xr-x 8 root wheel 272 27 Mar 19:03 Runner drwxr-xr-x 5 root wheel 170 27 Mar 19:03 TextUI drwxr-xr-x 32 root wheel 1088 27 Mar 19:03 Util I copied /etc/php.ini-default to /etc/php.ini and explicitly specified the include path as /usr/lib/php/ with an end / but still no success. $ php -i | grep include_path include_path => .:/usr/lib/php/ => .:/usr/lib/php/ $ phpunit TransferResponseTest.php PHP Fatal error: Class 'PHPUnit_TestCase' not found in /Volumes/Data/greg/code/syndicate/tests/TransferResponseTest.php on line 5 $ phpunit --version PHPUnit 3.4.11 by Sebastian Bergmann. Any ideas?

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• Encrypting using RSA via COM Interop = "The requested operation requires delegation to be enabled on

  - by Mr AH

  Hi Guys, So i've got this little static method in a .Net class which takes a string, uses some stored public key and returns the encrypted version of that key. This is basically so some user entered data can be saved an encrypted, then retrieved and decrypted at a later date. Pretty basic stuff and the unit test works fine. However, part of the application is in classic ASP. This then uses some COM visible version of the class to go off and invoke the method on the real class and return the same string to the COM client (classic ASP). I use this kind of stuff all the time, but in this case we have a major problem. As the method is doing something with RSA keys and has to access certain machine information to do so, we get the error: "The requested operation requires delegation to be enabled on the machine. I've searched around a lot, but can't really understand what this means. I assume I am getting this error on the COM but not the UT because the UT runs as me (Administrator) and classic ASP as IWAM. Anyone know what I need to do to enable IWAM to do this? Or indeed if this is the real problem here?

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• WPF - Dynamic tooltip

  - by Al Mackenzie

  I have a class ToolTipProvider which has a method string GetToolTip(UIElement element) which will return a specific tooltip for the UIElement specified, based on various factors including properties of the UIElement itself and also looking up into documentation which can be changed dynamically. It will also probably run in a thread so when the form first fires up the tooltips will be something like the visual studio 'Document cache is still being constructed', then populated in the background. I want to allow this to be used in any wpf form with the minimum effort for the developer. Essentially I want to insert an ObjectDataProvider resource into the Window.Resources to wrap my ToolTipProvider object, then I think I need to create a tooltip (called e.g. MyToolTipProvider) in the resources which references that ObjectDataProvider, then on any element which requires this tooltip functionality it would just be a case of ToolTip="{StaticResource MyToolTipProvider}" however I can't work out a) how to bind the actual elemnt itself to the MethodParameters of the objectdataprovider, or b) how to force it to call the method each time the tooltip is opened. Any ideas/pointers on the general pattern I need? Not looking for complete solution, just any ideas from those more experienced

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• How to right-justify icon in a JLabel?

  - by geoffreyzheng

  For a JLabel with icon, if you setHorizontalTextPosition(SwingConstants.LEADING), the icon is painted right after text, no matter how wide the label is. This is particularly bad for a list, as the icons would be all over the place depending on how long the text is for each item. I traced the code and it seems to be that in SwingUtilities#layoutCompoundLabelImpl, text width is simply set to SwingUtilities2.stringWidth(c, fm, text), and icon x is set to follow text without considering label width. Here is the simplest case: import java.awt.*; import javax.swing.*; public class TestJLabelIcon { public static void main(String args[]) { EventQueue.invokeLater(new Runnable() { public void run() { JLabel c = new JLabel("abc"); c.setHorizontalTextPosition(SwingConstants.LEADING); c.setHorizontalAlignment(SwingConstants.LEADING); c.setIcon(UIManager.getIcon("FileChooser.detailsViewIcon")); c.setBorder(BorderFactory.createLineBorder(Color.RED)); JFrame frame = new JFrame(); frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); frame.getContentPane().add(c); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } } You can see that label always fills the frame but icon stays put. You'll get the mirror problem if you set both arguments to TRAILING. I know I can override the UI, or use a JPanel, etc. I just wonder if I'm missing something simple in JLabel. If not, it seems like a Java bug. FYI this is jdk1.6.0_06 on Windows XP.

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• Ruby String accent error: More than meet the eyes

  - by Fabiano PS

  I'm having a real trouble to get accents right, and I believe this may happen to most Latin languages, in my case, portuguese I have a string that come as parameter and I must get the first letter and upcase it! That should be trivial in ruby, but here is the catch: s1 = 'alow'; s1.size #=> 4 s2 = 'álow'; s2.size #=> 5 s1[0,1] #=> "a" s2[0,1] #=> "\303" s1[0,1].upcase #=> 'A' s2[0,1].upcase #=> '\303' !!! s1[0,1].upcase + s1[1,100] #=> "Alow" OK s2[0,1].upcase + s2[1,100] #=> "álow" NOT OK I'd like to make it generic, Any help? [EDIT] I found that Rails Strings can be cast to Multibytes as seen in class ../active_support/core_ext/string/multibyte.rb, just using: s2.mb_chars[0,1].upcase.to_s #=> "Á" Still, @nsdk approach is easier to use =)

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• WCF: Per-Call and Per-Session services...need convincing that Per-Call is worthwhile

  - by mrlane

  Hello all. We are currently doing a review of our WCF service design and one thing that is bothering me is the decision between Per-Call and Per-Session services. I believe I understand the concept behind both, but I am not really seeing the advantage of Per-Call services. I understand that the motivation for using Per-Call services is that a WCF services only holds a servier object for the life of a call thereby restricting the time that an expensive resource is held by the service instance, but to me its much simpler to use the more OO like Per-Session model where your proxy object instance always corrisponds to the same server object instance and just handle any expensive resources manually. For example, say I have a CRUD Service with Add, Update, Delete, Select methods on it. This could be done as a Per-Call service with database connection (the "expensive resource") instanciated in the server object constructor. Alternately it could be a Per-Session service with a database connection instanciated and closed within each CRUD method exposed. To me it is no different resource wise and it makes the programming model simpler as the client can be assured that they always have the same server object for their proxies: any in-expensive state that there may be between calls is maintained and no extra parameters are needed on methods to identify what state data must be retrieved by the service when it is instanciating a new server object again (as in the case of Per-Call). Its just like using classes and objects, where the same resource management issues apply, but we dont create new object instances for each method call we have on an object! So what am I missing with the Per-Call model? Thanks

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• Aspnet_merge error has no detail

  - by dang57

  I have been attempting to add a Deployment Project to my web app. When I build it, I get a message "An error occurred when merging assemblies: Exception from HRESULT: 0x806D0004". There is no other detail, like ILMerge error, or Duplicate Name. I have "verbosity" set to "Diagnostic", and this is the output: Command: C:\Program Files\MSBuild\Microsoft\WebDeployment\v8.0\aspnet_merge.exe "\...XXX...\My Documents\Visual Studio 2005\Projects\XXX_deploy\Debug" -o XXX_deploy -debug -copyattrs The "AspNetMerge" task is using "aspnet_merge.exe" from "C:\Program Files\MSBuild\Microsoft\WebDeployment\v8.0\aspnet_merge.exe". Utility to merge precompiled ASP.NET assemblies. An error occurred when merging assemblies: Exception from HRESULT: 0x806D0004 C:\Program Files\MSBuild\Microsoft\WebDeployment\v8.0\Microsoft.WebDeployment.targets(474,9): error MSB6006: "aspnet_merge.exe" exited with code 1. Done executing task "AspNetMerge" -- FAILED. Done building target "AspNetMerge" in project "XXX_deploy.wdproj" -- FAILED. Done building project "XXX_deploy.wdproj" -- FAILED. Build FAILED. I have tried running the command via the Command prompt, but it does not give any additional information. I have also removed EVERYTHING from the project, including references, style sheets, forms, tableadapters. I still have a web.config, but deleted all app-specific lines. I added a single new form named Default. I have even tried renaming that form to DefaultX, just in case there was another Default out there. I still get the error. What else can I look for? I'm running VS 2005 v8.05. Thanks Dan

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• Sync Vs. Async Sockets Performance in C#

  - by Michael Covelli

  Everything that I read about sockets in .NET says that the asynchronous pattern gives better performance (especially with the new SocketAsyncEventArgs which saves on the allocation). I think this makes sense if we're talking about a server with many client connections where its not possible to allocate one thread per connection. Then I can see the advantage of using the ThreadPool threads and getting async callbacks on them. But in my app, I'm the client and I just need to listen to one server sending market tick data over one tcp connection. Right now, I create a single thread, set the priority to Highest, and call Socket.Receive() with it. My thread blocks on this call and wakes up once new data arrives. If I were to switch this to an async pattern so that I get a callback when there's new data, I see two issues The threadpool threads will have default priority so it seems they will be strictly worse than my own thread which has Highest priority. I'll still have to send everything through a single thread at some point. Say that I get N callbacks at almost the same time on N different threadpool threads notifying me that there's new data. The N byte arrays that they deliver can't be processed on the threadpool threads because there's no guarantee that they represent N unique market data messages because TCP is stream based. I'll have to lock and put the bytes into an array anyway and signal some other thread that can process what's in the array. So I'm not sure what having N threadpool threads is buying me. Am I thinking about this wrong? Is there a reason to use the Async patter in my specific case of one client connected to one server?

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• Multiple asynchronous method calls to method while in a loop

  - by ranabra

  I have spent a whole day trying various ways using 'AddOnPreRenderCompleteAsync' and 'RegisterAsyncTask' but no success so far. I succeeded making the call to the DB asynchronous using 'BeginExecuteReader' and 'EndExecuteReader' but that is missing the point. The asynch handling should not be the call to the DB which in my case is fast, it should be afterwards, during the 'while' loop, while calling an external web-service. I think the simplified pseudo code will explain best: (Note: the connection string is using 'MultipleActiveResultSets') "Select ID, UserName from MyTable" 'Open connection to DB ExecuteReader(); if (DR.HasRows) {     while (DR.Read())     {         'Call external web-service         'and get current Temperature of each UserName - DR["UserName"].ToString()         'Update my local DB         Update MyTable set Temperature = ValueFromWebService where UserName =                                       DR["UserName"]         CmdUpdate.ExecuteNonQuery();     }     'Close connection etc } Accessing the DB is fast. Getting the returned result from the external web-service is slow and that at least should be handled Asynchnously. If each call to the web service takes just 1 second, assuming I have only 100 users it will take minimum 100 seconds for the DB update to complete, which obviously is not an option. There eventually should be thousands of users (currently only 2). Currently everything works, just very synchnously :) Thoughts to myself: Maybe my way of approaching this is wrong? Maybe the entire process should be called Asynchnously Many thanx

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• Bash scripting problem

  - by komidore64

  I'm writing a bash script to sync my iTunes music directory to a directory on a removable hard drive. The script works fine when there is absolutely nothing in the folder on the external hard drive. Once all files have been copied to the external drive, then the script begins to act strange. Even though i just sync'd everything over, it proceeds to recopy certain files again. After the initial sync, it chooses the same files to resync each consecutive time the script is executed without any changes being made to the source directory. #!/bin/bash # shell script to sync music with gigabeat and/or firewire drive musicdir="/Users/komidore64/Music/iTunes/iTunes Media/Music" gigadir="/Volumes/GIGABEAT/music" # fwdir="/Volumes/" remove() { find "$1" \ ! \( -name "*.wav" \ -o -name "*.ogg" \ -o -name "*.flac" \ -o -name "*.aac" \ -o -name "*.mp3" \ -o -name "*.m4a" \ -o -name "*.wma" \ -o -name "*.m4p" \ -o -name "*.ape" \ -o -type d \) \ -exec rm -i {} \; } if [ $# == 0 ]; then echo "no device argument present" echo "specify '-g' for gigabeat" echo "or '-f' for firewire drive" else remove "$musicdir" while [ $1 ]; do case $1 in -g | --gigabeat ) rsync --archive --verbose --delete "$musicdir/" "$gigadir" ;; -f | --firewire ) rsync --archive --verbose --delete "$musicdir/" "$fwdir" esac shift done echo "music synced" fi

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• Links on SharePoint 2010 Master Page not changed based on Alternate Access Mappings

  - by victor_c

  We are creating a custom branded Master Page in SharePoint 2010. To make the page similar to a legacy page we have implemented an html based custom dropdown navigation menu we had in place directly on the Master Page (consisted of basic HTML elements ULs and LIs with A tags styled with a CSS class). I assumed the links from the basic HTML on the page would be subject to Alternate Access Mappings currently in place, but it seems to not be the case. On a test page opened in 3 different URLs (http://sharepoint2010, http://sharepoint2010.mydomain.com, https://sharepoint2010.mydomain.com) the links from a WIKI page are modified as I expected, but the links from the Custom Navigation Menu (plain HTML on the Master Page) are not modified. I can see where that would be useful... But is there a way that I can add links on the MasterPage in a way that SharePoint parses them first, making them subject to Alternate Access Mapping translation? I tried placing a link inside a SPLinkButton control, but it didn't achieve the desired behavior. e.g. <ul id="navmenu"> <li><SharePoint:SPLinkButton runat="server" NavigateUrl="http://sharepoint2010">sharepoint link</SharePoint:SPLinkButton></li> <li><a href="http://sharepoint2010">sharepoint2010</a></li> <li>test</li> </ul> When I access the page via https://sharepoint2010.mydomain.com the links above are still http://sharepoint2010 rather than https://sharepoint2010.mydomain.com Any thoughts? Thanks, Victor

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• Unit Testing.... a data provider ?

  - by TomTom

  Given problem: I like unit tests. I develop connectivity software to external systems that pretty much and often use a C++ library The return of this systems is nonndeterministic. Data is received while running, but making sure it is all correctly interpreted is hard. How can I test this properly? I can run a unit test that does a connect. Sadly, it will then process a life data stream. I can say I run the test for 30 or 60 seconds before disconnecting, but getting code ccoverage is impossible - I simply dont even comeclose to get all code paths EVERY ONCE PER DAY (error code paths are rarely run). I also can not really assert every result. Depending on the time of the day we talk of 20.000 data callbacks per second - all of which are not relly determined good enough to validate each of them for consistency. Mocking? Well, that would leave me testing an empty shell of myself because the code handling the events basically is the to be tested case, and in many cases we talk here of a COMPLEX c level structure - hard to have mocking frameworks that integrate from Csharp to C++ Anyone any idea? I am short on giving up using unit tests for this part of the application.

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• Win32: What is the status of chunked encoding support in WinHttpReadData?

  - by Cheeso

  The documentation for WinHttpReadData says, regarding HTTP's chunked transfer coding: Starting in Windows Vista and Windows Server 2008, WinHttp enables applications to perform chunked transfer encoding on data sent to the server. When the Transfer-Encoding header is present on the WinHttp response, WinHttpReadData strips the chunking information before giving the data to the application. Can anyone decipher this? Q1 First, this text is on the page for WinHttpReadData, which is used to ... read data within an HTTP client application, specifically the response data. So what does it mean when it says Starting in Windows Vista and Windows Server 2008, WinHttp enables applications to perform chunked transfer encoding on data sent to the server. The WinHttpReadData function isn't used with data being sent to the server. It is used when reading data from the server. Consulting the doc for the WinHttpWriteData function, which is used to send data to the server as part of an HTTP request, there is no mention of the chunked transfer capability. Q2 Supposing that I figure out just what the newish chunked transfer support amounts to, how do I get that support? It says that it is new on Vista and WS2008. What happens if I write an app that runs on WS2003, and uses WinHttpReadData and it encounters a chunked response, or WinHttpWriteData, and it wants to send a chunked request? Between the lines, is this documentation saying that I need to link against the Vista-era Windows SDK, or later, in order to get the capability to do chunked encoding? Or is it really impossible on WS2003?, in other words it is the case that the app doing chunked transfer using this library must run on the OS specified? This might read like a rant, but it's not. I truly want to know.

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• Cannot see named Silverlight control in code

  - by Alexandra

  In my first few hours with Silverlight 3, as an avid WPF user, I am greatly disappointed at the many things it doesn't support. This seems like an odd issue to me and it's so generic that I cannot find anything online about it. I have the following XAML: <controls:TabControl x:Name="workspacesTabControl" Grid.Row="1" Background="AntiqueWhite" ItemsSource="{Binding Workspaces, ElementName=_root}"/> However, I cannot see the workspacesTabControl in code-behind. I thought maybe IntelliSense is just being mean and tried to go ahead and compile it anyway, but got an error: Error 1 The name 'workspacesTabControl' does not exist in the current context How do I access controls in code-behind? EDIT: I realized I've pasted the wrong error - I have two controls inside the UserControl called workspacesTabControl and menuStrip. I cannot get to either one of them by their name in the code-behind. Just in case, here is the XAML for the menuStrip: <controls:TreeView Grid.ColumnSpan="2" Height="100" x:Name="menuStrip" ItemContainerStyle="{StaticResource MenuStripStyle}" ItemsSource="{Binding Menu, ElementName=_root}"/> EDIT AGAIN: I'm not sure if this is helpful, but I've taken a look at the InitializeComponent() code and here's what I saw: [System.Diagnostics.DebuggerNonUserCodeAttribute()] public void InitializeComponent() { if (_contentLoaded) { return; } _contentLoaded = true; System.Windows.Application.LoadComponent(this, new System.Uri("/SapphireApplication;component/SapphireMain.xaml", System.UriKind.Relative)); } It seems that it simply loads the XAML when it runs (not before or during compilation) so the menuStrip and workspacesTabControl names don't actually get registered anywhere (as they usually are in WPF/win Forms). Could that attribute be a problem? And where do I get rid of this requirement for all the future UserControls I make?

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