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• dns queries not using nscd for caching

  - by xenoterracide

  I'm trying to use nscd (Nameservices Cache Daemon) to cache dns locally so I can stop using bind to do it. I've gotten it started and ntpd seems to attempt to use it. But everything else for hosts seems to ignore it. e.g if I do dig apache.org 3 times none of them will hit the cache. I'm viewing the cache stats using nscd -g to determine whether it's been used. I've also turned the debug log level up to see if I can see it hitting and the queries don't even hit nscd. nsswitch.conf # Begin /etc/nsswitch.conf passwd: files group: files shadow: files publickey: files hosts: cache files dns networks: files protocols: files services: files ethers: files rpc: files netgroup: files # End /etc/nsswitch.confenter code here nscd.conf # # /etc/nscd.conf # # An example Name Service Cache config file. This file is needed by nscd. # # Legal entries are: # # logfile <file> # debug-level <level> # threads <initial #threads to use> # max-threads <maximum #threads to use> # server-user <user to run server as instead of root> # server-user is ignored if nscd is started with -S parameters # stat-user <user who is allowed to request statistics> # reload-count unlimited|<number> # paranoia <yes|no> # restart-interval <time in seconds> # # enable-cache <service> <yes|no> # positive-time-to-live <service> <time in seconds> # negative-time-to-live <service> <time in seconds> # suggested-size <service> <prime number> # check-files <service> <yes|no> # persistent <service> <yes|no> # shared <service> <yes|no> # max-db-size <service> <number bytes> # auto-propagate <service> <yes|no> # # Currently supported cache names (services): passwd, group, hosts, services # logfile /var/log/nscd.log threads 4 max-threads 32 server-user nobody # stat-user somebody debug-level 9 # reload-count 5 paranoia no # restart-interval 3600 enable-cache passwd yes positive-time-to-live passwd 600 negative-time-to-live passwd 20 suggested-size passwd 211 check-files passwd yes persistent passwd yes shared passwd yes max-db-size passwd 33554432 auto-propagate passwd yes enable-cache group yes positive-time-to-live group 3600 negative-time-to-live group 60 suggested-size group 211 check-files group yes persistent group yes shared group yes max-db-size group 33554432 auto-propagate group yes enable-cache hosts yes positive-time-to-live hosts 3600 negative-time-to-live hosts 20 suggested-size hosts 211 check-files hosts yes persistent hosts yes shared hosts yes max-db-size hosts 33554432 enable-cache services yes positive-time-to-live services 28800 negative-time-to-live services 20 suggested-size services 211 check-files services yes persistent services yes shared services yes max-db-size services 33554432 resolv.conf # Generated by dhcpcd from eth0 nameserver 127.0.0.1 domain westell.com nameserver 192.168.1.1 nameserver 208.67.222.222 nameserver 208.67.220.220 as kind of a side note I'm using archlinux.

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• Dump an arbitrary object To Html String

  - by Michael Freidgeim

  For debugging purposes me and my collegue wanted to dump details of the arbitrary object, and created function that uses LINQPad Dump functionality (thanks to http://stackoverflow.com/a/6035014/52277 and original http://linqpad.uservoice.com/forums/18302-linqpad-feature-suggestions/suggestions/447166-make-dump-extension-method-available-in-visual-s discussion)    public static string DumpToHtmlString<T>(this T objectToSerialize)        {            string strHTML = "";            try            {                var writer = LINQPad.Util.CreateXhtmlWriter(true);                writer.Write(objectToSerialize);                strHTML = writer.ToString();            }            catch (Exception exc)            {                Debug.Assert(false, "Investigate why ?" + exc);            }            return strHTML;        }You will need to add the linqpad executable as a reference in your project.TO DO similar in plain text ,look at https://github.com/ServiceStack/ServiceStack.Text StringExtensions , e.g. JsonSerializer/CsvSerializer or http://objectdumper.codeplex.com/

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• How to boot XBMC 10.1 ISO on USB via grub?

  - by Shi

  I am trying to boot the XBMC Live image (http://xbmc.org/download/) as ISO from USB via grub 1.98. I have a Kubuntu 11.04 image there as well already and it works using the following configuration: menuentry "Kubuntu 11.04 64bit" { loopback loop /boot/iso/kubuntu-11.04-desktop-amd64.iso linux (loop)/casper/vmlinuz boot=casper iso-scan/filename=/boot/iso/kubuntu-11.04-desktop-amd64.iso noeject noprompt initrd (loop)/casper/initrd.gz } However, if I try to boot XBMC in an analogue way, I always get an error "Unable to find a medium containing a live file system". I found different approaches to install XBMC, but they all are about installing the distribution on USB, or using grub4dos, or unetbootin. I already found out that XBMC 10.1 is based on Ubuntu 10.04.2 LTS, so I tried those settings - even though they are quite similar to Kubuntu 11.04. Finally, the ISO contains a grub configuration as well in boot/grub/grub.cfg, but even with those parameters, I get the error above. My current configuration is the following one: menuentry "xbmc 10.1" { loopback loop /boot/iso/xbmc-10.1-live.iso linux (loop)/live/vmlinuz video=vesafb boot=live iso-scan/filename=/boot/iso/xbmc-10.1-live.iso xbmc=autostart,nodiskmount splash quiet loglevel=0 persistent quickreboot quickusbmodules notimezone noaccessibility noapparmor noaptcdrom noautologin noxautologin noconsolekeyboard nofastboot nognomepanel nohosts nokpersonalizer nolanguageselector nolocales nonetworking nopowermanagement noprogramcrashes nojockey nosudo noupdatenotifier nouser nopolkitconf noxautoconfig noxscreensaver nopreseed union=aufs initrd (loop)/live/initrd.img } Any more ideas or any more information I should supply?

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• Read Song Title/Artist from a live audio stream with Silverlight 4?

  - by Brent Pabst

  I have a SL4 project that is successfully streaming a great sounding WMA audio stream from a remote location. All of the MediaElement actions are straight forward. What I want to do is read the attributes that are passed as text along with the Audio stream. For instance the encoder of the stream embeds the title of the stream, the title of the song playing and the name of the artist for the current song. How would I pick this out using Silverlight 4 and then display it in a Label to the user? It sure would be easier than writing a bunch of web services to do the same thing. Windows Media Player and WinAmp all get the information I am just not seeing it in the MediaElement object collection.

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• Lucene: Question of score caculation with PrefixQuery

  - by Keven

  Hi, I meet some problem with the score caculation with a PrefixQuery. To change score of each document, when add document into index, I have used setBoost to change the boost of the document. Then I create PrefixQuery to search, but the result have not been changed according to the boost. It seems setBoost totally doesn't work for a PrefixQuery. Please check my code below: @Test public void testNormsDocBoost() throws Exception { Directory dir = new RAMDirectory(); IndexWriter writer = new IndexWriter(dir, new StandardAnalyzer(Version.LUCENE_CURRENT), true, IndexWriter.MaxFieldLength.LIMITED); Document doc1 = new Document(); Field f1 = new Field("contents", "common1", Field.Store.YES, Field.Index.ANALYZED); doc1.add(f1); doc1.setBoost(100); writer.addDocument(doc1); Document doc2 = new Document(); Field f2 = new Field("contents", "common2", Field.Store.YES, Field.Index.ANALYZED); doc2.add(f2); doc2.setBoost(200); writer.addDocument(doc2); Document doc3 = new Document(); Field f3 = new Field("contents", "common3", Field.Store.YES, Field.Index.ANALYZED); doc3.add(f3); doc3.setBoost(300); writer.addDocument(doc3); writer.close(); IndexReader reader = IndexReader.open(dir); IndexSearcher searcher = new IndexSearcher(reader); TopDocs docs = searcher.search(new PrefixQuery(new Term("contents", "common")), 10); for (ScoreDoc doc : docs.scoreDocs) { System.out.println("docid : " + doc.doc + " score : " + doc.score + " " + searcher.doc(doc.doc).get("contents")); } } The output is : docid : 0 score : 1.0 common1 docid : 1 score : 1.0 common2 docid : 2 score : 1.0 common3

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• C# WebClient only downloads partial html

  - by H4mm3rHead

  Hi, I am working on some scraping app, i wanted to try to get it to work but ran into a problem. I have replaced the original scraping destination in the below code with googles webpage, just for testing. It seems that my download doesnt get everything, i note that the body and the html tags are missing their close tags. How do i get it to download everything? Whats wrong with my sample code: string filename = "test.html"; WebClient client = new WebClient(); string searchTerm = HttpUtility.UrlEncode(textBox2.Text); client.QueryString.Add("q", searchTerm); client.QueryString.Add("hl", "en"); string data = client.DownloadString("http://www.google.com/search"); StreamWriter writer = new StreamWriter(filename, false, Encoding.Unicode); writer.Write(data); writer.Flush(); writer.Close();

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• __spin_lock while writing the bytes in NSOutputStream

  - by Mohammed Sadiq

  HI all, I have a issue that when I try to write some bytes in the outputstream, I am getting the bad access. The code is as follows : int writtenBytes = [_os write:[packetInBytes bytes] maxLength:lengthOfPacket]; where the "packetInBytes" points to NSData and "lengthOfPacket" corresponds to the data length, and _os represents the NSOutputStream. The call stack from the debugger is as follows : 0 0xffff0269 in __spin_lock 1 0x302a6098 in CFSocketDisableCallBacks 2 0x003b46d0 in SocketStream::write 3 0x302402c3 in CFWriteStreamWrite 4 0x0001b423 in -[Writer write:] at Writer.m:96 5 0x0001b5ef in -[Writer run] at Writer.m:111 6 0x3050a79d in -[NSThread main] 7 0x3050a338 in NSThread__main 8 0x91a27fe1 in _pthread_start 9 0x91a27e66 in thread_start** I am not getting this issue always. I get this issue execute my code for some 5 or more times ... I have checked all the params that i pass to the write function have its values and not nil. Any help would be greatly appreciated Best Regards, MOhammed Sadiq.

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• NoSuchMethodError in Java using XStream

  - by Brad Germain

  I'm trying to save a database into a file using XStream and then open it again later using XStream and deserialize it back into the objects it was in previously. The database consists of an arraylist of tables, which consists of an arraylist of a data class where the data class contains an arraylist of objects. I'm basically trying to create an sql compiler. I'm currently getting a java.lang.NoSuchMethodError because of the last line in the load method. Here's what I have: Save Method public void save(Database DB){ File file = new File(DB.getName().toUpperCase() + ".xml"); //Test sample DB.createTable("TBL1(character(a));"); DB.tables.getTable("TBL1").rows.add(new DataList()); DB.tables.getTable("TBL1").rows.getRow(0).add(10); XStream xstream = new XStream(); //Database xstream.alias("Database", Database.class); //Tables xstream.alias("Table", Table.class); //Rows xstream.alias("Row", DataList.class); //Data //xstream.alias("Data", Object.class); //String xml = xstream.toXML(DB); Writer writer = null; try { writer = new FileWriter(file); writer.write(xstream.toXML(DB)); writer.close(); } catch (IOException e) { e.printStackTrace(); } } Load Method public void Load(String dbName){ XStream xstream = new XStream(); BufferedReader br; StringBuffer buff = null; try { br = new BufferedReader(new FileReader(dbName + ".xml")); buff = new StringBuffer(); String line; while((line = br.readLine()) != null){ buff.append(line); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } database = (Database)xstream.fromXML(buff.toString()); }

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• Flash: Should I always use socket policy file servers or can I live somehow without daemons?

  - by WoppyCold

  That is for working with flash sockets (for irc clients).

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• Which are the GNU Emacs modes/extensions you can't live without?

  - by Baishampayan Ghose

  I have been using GNU Emacs for as long as I can remember. The Emacs modes I use regularly are: Tramp Template Color-theme Python VCS SLIME Paredit Uniquify RCIRC Org Which ones do you use?

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• How do I read live camera data on the iPhone (like Microsoft Tag Reader)?

  - by Bill

  While the user is still in UIImagePickerController, I'd like to be able to get a UIImage representation of the image in the camera, make some changes to the image, and then display the altered image instead of the image coming directly from the camera. How can I do this? I tried setting a timer and calling takePicture, but calling it seemed to have no effect. The documentation says: Calling this method while an image is being captured has no effect. You must wait until the associated delegate object receives an imagePickerController:didFinishPickingMediaWithInfo: message before you can capture another picture. So how can I do this? I know that it's possible, since apps like Tag Reader are able to detect when something specific rolls in front of the camera. Thanks!

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• How to upgrade self-hosted wordpress and it's plugins of live site without facing any trouble?

  - by jitendra

  I have to upgrade a running wordpress site's wordpress CMS and some installed plugins.and some plugins which i want to upgrade has been modified before to achieve something. http://is.gd/b5j9h How to upgrade Wordpress to latest without loosing anything, any post, comments? What precautions should i take? How should i take backup of all things? Should i take backup of database also? How to upgraded modified plugins without loosing functionality?

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• GWT with spring security not working on app engine live server.

  - by bedanand

  I configured gwt with spring and spring security that works fine on local development server on google app engine. I deployed to the appspot but there it shows critical error when i see on the log. and on the browser side shows 500 server error. log error Uncaught exception from servlet javax.servlet.UnavailableException: Initialization failed. at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:200) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:168) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:123) at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:243) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5838) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5836) at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest(BlockingApplicationHandler.java:24) at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:398) at com.google.net.rpc.impl.Server$2.run(Server.java:852) at com.google.tracing.LocalTraceSpanRunnable.run(LocalTraceSpanRunnable.java:56) at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan(LocalTraceSpanBuilder.java:576) at com.google.net.rpc.impl.Server.startRpc(Server.java:807) at com.google.net.rpc.impl.Server.processRequest(Server.java:369) at com.google.net.rpc.impl.ServerConnection.messageReceived(ServerConnection.java:442) at com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java:319) at com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java:290) at com.google.net.async.Connection.handleReadEvent(Connection.java:474) at com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java:831) at com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:207) at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:103) at com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java:251) at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run(JavaRuntime.java:404) at java.lang.Thread.run(Unknown Source) web.xml <web-app> <servlet> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>*.rpc</url-pattern> </servlet-mapping> <filter> <filter-name>springSecurityFilterChain</filter-name> <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> </filter> <filter-mapping> <filter-name>springSecurityFilterChain</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- Default page to serve --> <welcome-file-list> <welcome-file>PushUrl.html</welcome-file> </welcome-file-list> </web-app> appengine-web.xml <application>pushurl</application> <version>1</version> <!-- Configure java.util.logging --> <system-properties> <property name="java.util.logging.config.file" value="WEB-INF/logging.properties"/> </system-properties> <sessions-enabled>true</sessions-enabled> applicationContext.xml <security:http auto-config="true"> <security:intercept-url pattern="/**/users.rpc" access="ROLE_USER"/> <security:intercept-url pattern="/**/categories.rpc" access="ROLE_ADMIN"/> <security:intercept-url pattern="/css/**" filters="none"/> <security:intercept-url pattern="/login.jsp*" filters="none"/> <security:form-login login-page='/login.jsp' /> </security:http> <security:authentication-manager> <security:authentication-provider> <security:user-service> <security:user name="jimi" password="jimi" authorities="ROLE_USER, ROLE_ADMIN" /> <security:user name="bob" password="bob" authorities="ROLE_USER" /> </security:user-service> </security:authentication-provider> </security:authentication-manager> dispatcher-servlet.xml <bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"> <property name="mappings"> <value> /**/users.rpc=userService /**/categories.rpc=categoryService </value> </property> </bean> <bean id="userController" class="com.beda.pushurl.server.GwtRpcController"> <property name="remoteService" ref="userService"> </property> </bean> <bean id="userService" class="com.beda.pushurl.server.UserServiceImpl" > <property name="userDAO" ref="myUserDAO"></property> </bean> <bean id="categoryService" class="com.beda.pushurl.server.CategoryServiceImpl"> <property name="categoryDAO" ref="myCategoryDAO"></property> </bean> <bean id="myUserDAO" class="com.beda.pushurl.server.dao.UserDAOImpl"> </bean> <bean id="myCategoryDAO" class="com.beda.pushurl.server.dao.CategoryDAOImpl"> </bean>

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• Overridden button control escaping content. How to stop it?

  - by RemotecUk

  Hi, I've got an ASP.Net button control that I have overridden to provide different functionality. the code looks as follows.. I'm overriding the Render method to surround the control with an <a>... /// <summary> /// Render Method /// </summary> /// <param name="writer"></param> protected override void Render(HtmlTextWriter writer) { base.CssClass = "euva-button-decorated"; writer.Write("<a class=\"euva-button\">"); base.Render(writer); writer.Write("</a>"); } When I check the generated source on the page, I find that where ASP.Net has injected its click handler it does the following... <a class="euva-button"><input type="submit" name="TestButton" value="Test Button" onclick="clickOnce(this);WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions(&quot;TestButton&quot;, &quot;&quot;, true, &quot;&quot;, &quot;&quot;, false, false))" id="TestButton" class="euva-button-decorated" /></a> ... it seems to be escaping the output for the double quotes which means that the browser cannot understand the javascript. How do I make the render method not escape the injected ASP.Net client click handler ?? Note I also have my own client click handler which is declared declaratively in the page mark-up.

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• Using RJS to replace innerHTML with a real live instance variable.

  - by Steve Cotner

  I can't for the life of me get RJS to replace an element's innerHTML with an instance variable's attribute, i.e. something like @thing.name I'll show all the code (simplified from the actual project, but still complete), and I hope the solution will be forehead-slap obvious to someone... In RoR, I've made a simple page displaying a random Chinese character. This is a Word object with attributes chinese and english. Clicking on a link titled "What is this?" reveals the english attribute using RJS. Currently, it also hides the "What is this?" link and reveals a "Try Another?" link that just reloads the page, effectively starting over with a new random character. This is fine, but there are other elements on the page that make their own database queries, so I would like to load a new random character by an AJAX call, leaving the rest of the page alone. This has turned out to be harder than I expected: I have no trouble replacing the html using link_remote_to and page.replace_html, but I can't get it to display anything that includes an instance variable. I have a Word resource and a Page resource, which has a home page, where all this fun takes place. In the PagesController, I've made a couple ways to get random words. Either one works fine... Here's the code: class PagesController < ApplicationController def home all_words = Word.find(:all) @random_word = all_words.rand @random_words = Word.find(:all, :limit => 100, :order => 'rand()') @random_first = @random_words[1] end end As an aside, the SQL call with :limit => 100 is just in case I think of some way to cycle through those random words. Right now it's not useful. Also, the 'rand()' is MySQL specific, as far as I know. In the home page view (it's HAML), I have this: #character_box = render(:partial => "character", :object => @random_word) if @random_word #whatisthis = link_to_remote "? what is this?", :url => { :controller => 'words', :action => 'reveal_character' }, :html => { :title => "Click for the translation." } #tryanother.{:style => "display:none"} = link_to "try another?", root_path Note that the #'s in this case represent divs (with the given ids), not comments, because this is HAML. The "character" partial looks like this (it's erb, for no real reason): <div id="character"> <%= "#{@random_word.chinese}" } %> </div> <div id="revealed" style="display:none"> <ul> <li><span id="english"><%= "#{@random_word.english_name}" %></span></li> </ul> </div> The reveal_character.rjs file looks like this: page[:revealed].visual_effect :slide_down, :duration => '.2' page[:english].visual_effect :highlight, :startcolor => "#ffff00", :endcolor => "#ffffff", :duration => '2.5' page.delay(0.8) do page[:whatisthis].visual_effect :fade, :duration => '.3' page[:tryanother].visual_effect :appear end That all works perfectly fine. But if I try to turn link_to "try another?" into link_to_remote, and point it to an RJS template that replaces the "character" element with something new, it only works when I replace the innerHTML with static text. If I try to pass an instance variable in there, it never works. For instance, let's say I've defined a second random word under Pages#home... I'll add @random_second = @random_words[2] there. Then, in the home page view, I'll replace the "try another?" link (previously pointing to the root_path), with this: = link_to_remote "try another?", :url => { :controller => 'words', :action => 'second_character' }, :html => { :title => "Click for a new character." } I'll make that new RJS template, at app/views/words/second_character.rjs, and a simple test like this shows that it's working: page.replace_html("character", "hi") But if I change it to this: page.replace_html("character", "#{@random_second.english}") I get an error saying I fed it a nil object: ActionView::TemplateError (undefined method `english_name' for nil:NilClass) on line #1 of app/views/words/second_character.rjs: 1: page.replace_html("character", "#{@random_second.english}") Of course, actually instantiating @random_second, @random_third and so on ad infinitum would be ridiculous in a real app (I would eventually figure out some better way to keep grabbing a new random record without reloading the page), but the point is that I don't know how to get any instance variable to work here. This is not even approaching my ideal solution of rendering a partial that includes the object I specify, like this: page.replace_html 'character', :partial => 'new_character', :object => @random_second As I can't get an instance variable to work directly, I obviously cannot get it to work via a partial. I have tried various things like: :object => @random_second or :locals => { :random_second => @random_second } I've tried adding these all over the place -- in the link_to_remote options most obviously -- and studying what gets passed in the parameters, but to no avail. It's at this point that I realize I don't know what I'm doing. This is my first question here. I erred on the side of providing all necessary code, rather than being brief. Any help would be greatly appreciated.

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• How to use infinit live streams with JAVE library? (Java, ffmpeg)

  - by Ole Jak

  So I want to use JAVE to save mp3 radio stream to my File system. I have this code for file saving but what shall I do to save a stream (stop on timer for ex) File source = new File("source.wav"); File target = new File("target.mp3"); AudioAttributes audio = new AudioAttributes(); audio.setCodec("libmp3lame"); audio.setBitRate(new Integer(128000)); audio.setChannels(new Integer(2)); audio.setSamplingRate(new Integer(44100)); EncodingAttributes attrs = new EncodingAttributes(); attrs.setFormat("mp3"); attrs.setAudioAttributes(audio); Encoder encoder = new Encoder(); encoder.encode(source, target, attrs);

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• Groovy markupbuilder tags

  - by john renfrew

  Is there a way to modify the code from a previous answer import groovy.xml.MarkupBuilder def writer = new StringWriter() def builder = new MarkupBuilder(writer) def awaiting = ['one', 'two', 'three'] builder.html { ul { awaiting.each { li(it.toString()) } } } println writer.toString() so that if you add a tag instead that you send it - like builder.html{ tag{ awaiting.each{} } } return result could be 'ol' or 'ul' for example

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• Is it wrong to get feedback from Stack Overflow on a live system architecture?

  - by hal10001

  I am the technical director at a startup, and I will eventually be tasked with implementing a "real" system architecture when we hire more programmers. Right now our clients are small enough, and it is just me, so documented deployments, source control, unit tests and quality assurance servers are non-existent. Eventually I will need to devise a work-flow and architecture patterns for the majority of the work we will do (e-commerce). If I posted an architecture diagram, and asked for feedback, would that be a misuse of the Stack Overflow system? I don't want to get into that battle of "hey, don't ask us to do your job for you", but the reality is that any programmer who eventually moves into this realm will have to figure it out with feedback from other developers. HighScalability.com is what comes to mind when I think about this sorta thing in terms of the knowledge I need. So if this is not the right kind of forum for that, then any book recommendations or white papers you can recommend would be appreciated.

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• Why do I get error "prefix [..] is not defined" when I try to use my jsf custom tag?

  - by Roman

  I created a jsf custom tag (I'm not sure that it's correct, I could miss something easily, so I attached code below). Now I'm trying to use this tag but I get an error: error on line 28 at column 49: Namespace prefix gc on ganttchart is not defined So, here is the xhtml-page: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" xmlns:gc="http://myganttchart.org"> <body> <ui:composition template="/masterpage.xhtml"> <ui:define name="title">Gantt chart test</ui:define> <ui:define name="content"> <f:view> <gc:ganttchart width="300" height="100" rendered="true"/> ... </f:view> </ui:define> </ui:composition> </body> </html> And here is tld-file (it's placed in WEB-INF/): <taglib xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.1"> <tlib-version> 1.0 </tlib-version> <short-name> oext </short-name> <uri> http://myganttchart.org </uri> <tag> <name>ganttchart</name> <tag-class>usermanagement.support.ganttchart.GanttChartTag</tag-class> <body-content>empty</body-content> <attribute> <name>binding</name> <deferred-value> <type>javax.faces.component.UIComponent</type> </deferred-value> </attribute> ... </tag> </tablib> Here is a part of tag-class code: public class GanttChartTag extends UIComponentELTag { private ValueExpression width; private ValueExpression height; private ValueExpression styleClass; public String getComponentType () { return "org.myganttchart"; } public String getRendererType () { return null; } ... } Correspondent block from faces-config: <component> <component-type>org.myganttchart</component-type> <component-class>usermanagement.support.ganttchart.UIGanttChart</component-class> </component> And the last part if UIGanttChart: public class UIGanttChart extends UIOutput { public UIGanttChart() { setRendererType (null); } //some test code public void encodeBegin(FacesContext context) throws IOException { ResponseWriter writer = context.getResponseWriter (); writer.startElement("img", this); writer.writeAttribute("src", "no-img", "source"); writer.writeAttribute("width", getAttributes ().get ("width"), "width"); writer.writeAttribute("height", getAttributes ().get ("height"), "height"); writer.writeAttribute("class", ".someclass", "styleClass"); writer.endElement("img"); } } So, what did I miss?

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• C# How to perform a live xslt transformation on an in memory object?

  - by JL

  I have a function that takes 2 parameters : 1 = XML file, 2 = XSLT file, then performs a transformation and returns the resulting HTML. Here is the function: /// <summary> /// Will apply an XSLT style to any XML file and return the rendered HTML. /// </summary> /// <param name="xmlFileName"> /// The file name of the XML document. /// </param> /// <param name="xslFileName"> /// The file name of the XSL document. /// </param> /// <returns> /// The rendered HTML. /// </returns> public string TransformXml(string xmlFileName, string xslFileName) { var xtr = new XmlTextReader(xmlFileName) { WhitespaceHandling = WhitespaceHandling.None }; var xd = new XmlDocument(); xd.Load(xtr); var xslt = new System.Xml.Xsl.XslCompiledTransform(); xslt.Load(xslFileName); var stm = new MemoryStream(); xslt.Transform(xd, null, stm); stm.Position = 1; var sr = new StreamReader(stm); xtr.Close(); return sr.ReadToEnd(); } I want to change the function not to accept a file for the XML, but instead just an object. The object is exactly compatible with the xslt, if it was serialized to file. But I don't want to have to serialize it to a file first. So to recap : keep the xslt coming from a file, but the xml input should an object I pass and would like to generate the xml from without any file system interaction.

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• Trying to write a video file using OpenCV

  - by Ted pottel

  Hi , I’m trying to use OpenCV to write a video file. I have a simple program that loads frames from a video file then accepts to save them At first the cvCreateVideoWrite always return NULL. I got a answer from your group saying it returns separate images and to try to change the file name to test0001.png, this worked. But now the cvWriteFrame function always fails, the code is CString path; path="d:\\mice\\Test_Day26_2.avi"; CvCapture* capture = cvCaptureFromAVI(path); IplImage* img = 0; CvVideoWriter *writer = 0; int isColor = 1; int fps = 25; // or 30 int frameW = 640; // 744 for firewire cameras int frameH = 480; // 480 for firewire cameras writer=cvCreateVideoWriter("d:\\mice\\test0001.png",CV_FOURCC('P','I','M','1'), fps,cvSize(frameW,frameH),isColor); if (writer==0) MessageBox("could not open writter"); int nFrames = 50; for(int i=0;i<nFrames;i++){ if (!cvGrabFrame(capture)) MessageBox("could not grab frame"); img=cvRetrieveFrame(capture); // retrieve the captured frame if (img==0) MessageBox("could not retrive data"); if (!cvWriteFrame(writer,img) ) MessageBox("could not write frame"); } cvReleaseVideoWriter(&writer); Any help would be GREAT - Ted

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• Event Calandar using Silverlight Calendar Control

  - by Jinal Desai - LIVE

  I require event calendar by using silverlight Calendar control or custom control. In it I want to add events (multiple) based on particular data and display those events on that particular date inside the calendar itself. Is there any ready made control of solution exists??

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• Stop default hashtag behavior with jquery

  - by scatteredbomb

  I'm using the following code to append a hashtag to the end of a url. That way someone can copy that url and take them back to that page, with certain divs visable. $("a.live").click(function() { window.location.hash = 'live'; $("#live).slideDown(); }); In this example I have a div called 'live', that would slideDown when a link is clicked, and '#live' added to the url. Then I have code that checks the hash tags when the page is loaded to show the proper divs. My problem is, how do I prevent the browser from jumping to the 'live' div once it's called? I don't want the page to scroll down to the div, just want it opened and the hashtag appended so a person could copy it and come back to that page with that div showing. Any tips? Thank you!

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• How to store or share live data between PHP Requests?

  - by Devyn

  Hi, I want to start a project for facebook and the application will be like real-time multiplayer chess game. The problem I'm having is I have no idea how to store the data when a player moves one piece and update the new position in player2 browser. I'm gonna use PHP, MySQL for server side and jQuery for Client Rendering. The simplest idea is to store the data in XML or MySQL and re-generate the result to player2 browser. But I know that when thousand of players are playing, it will not be an efficient way. Since I don't have time to study new language for this project, I'm gonna have to stick with PHP. I'm not going to use flash either because I want my client side light-weight and flash-free. So is there any way that will solve my problems?

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• Youtube url in live feed on the Wall for my social network.

  - by saurabh gupta

  If anyone can help me with the Video wall posts on my site www.fameboxx.com, then i would really be greatful. Since youtube changed its design i could not post Videos using the URL from youtube. What am i suppose to do in this case. You can check the site www.fameboxx.com Please help.

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