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• Grails beginner problem "Failed to invoke Servlet 2.5"

  - by A Lion

  I'm trying to get Groovy on Grails set up on a Snow Leopard machine. I followed all the grails.com install directions and am trying to start the application from Grails: A Quick-Start Guide by Dave Klein. I ran grails create-app TekDays with no apparent problems and was able to cd to the TekDays folder, but when I try to run grails run-app I get the following: Welcome to Grails 1.3.1 - http://grails.org/ Licensed under Apache Standard License 2.0 Grails home is set to: /grails Base Directory: /apps/TekDays Resolving dependencies... Dependencies resolved in 4469ms. Running script /grails/scripts/RunApp.groovy Environment set to development [delete] Deleting directory /Users/name/.grails/1.3.1/projects/TekDays/tomcat Running Grails application.. 2010-05-24 21:42:39,559 [main] ERROR context.GrailsContextLoader - Error executing bootstraps: Failed to invoke Servlet 2.5 getContextPath method java.lang.IllegalStateException: Failed to invoke Servlet 2.5 getContextPath method at org.grails.tomcat.TomcatServer.start(TomcatServer.groovy:164) at grails.web.container.EmbeddableServer$start.call(Unknown Source) at _GrailsRun_groovy$_run_closure5_closure12.doCall(_GrailsRun_groovy:159) at _GrailsRun_groovy$_run_closure5_closure12.doCall(_GrailsRun_groovy) at _GrailsSettings_groovy$_run_closure10.doCall(_GrailsSettings_groovy:282) at _GrailsSettings_groovy$_run_closure10.call(_GrailsSettings_groovy) at _GrailsRun_groovy$_run_closure5.doCall(_GrailsRun_groovy:150) at _GrailsRun_groovy$_run_closure5.call(_GrailsRun_groovy) at _GrailsRun_groovy.runInline(_GrailsRun_groovy:116) at _GrailsRun_groovy.this$4$runInline(_GrailsRun_groovy) at _GrailsRun_groovy$_run_closure1.doCall(_GrailsRun_groovy:59) at RunApp$_run_closure1.doCall(RunApp.groovy:33) at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381) at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415) at gant.Gant$_dispatch_closure7.doCall(Gant.groovy) at gant.Gant.withBuildListeners(Gant.groovy:427) at gant.Gant.this$2$withBuildListeners(Gant.groovy) at gant.Gant$this$2$withBuildListeners.callCurrent(Unknown Source) at gant.Gant.dispatch(Gant.groovy:415) at gant.Gant.this$2$dispatch(Gant.groovy) at gant.Gant.invokeMethod(Gant.groovy) at gant.Gant.executeTargets(Gant.groovy:590) at gant.Gant.executeTargets(Gant.groovy:589) Caused by: java.lang.NoSuchMethodException: javax.servlet.ServletContext.getContextPath() at java.lang.Class.getMethod(Class.java:1605) ... 23 more I've googled every derivative of "Failed to invoke Servlet 2.5" that I can think of, but have thus far been unable to find anything that helps me understand, yet alone resolve, the error. Any advice to help me resolve this would be very much appreciated!

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• Jar not found when executing class

  - by Simon

  Hi there, I'm working through the ANTLR book and there are many examples that should be easy to compile using the command line. Some information to get te problem: antlr-3.2.jar contains the ANTLR classes. I added the antlr-3.2.jar to the CLASSPATH environment variable (Windows 7) and when compiling the classes with javac everything works fine. This is what i execute to compile my program: javac Test.java ExprLexer.java ExprParser.java Test.java contains my main()-method whereas ExprLexer and ExprParser are generated by ANTLR. All three classes use classes contained in the antlr-3.2.jar. But so far so good. As I just said, compiling works fine. It's when I try to execute the Test.class that I get trouble. This is what I type: java -cp ./ Test When executing this, the interpreter tells me that he can't find the ANTLR-classes contained in the antlr-3.2.jar, altough I added an entry in the CLASSPATH variable. E:\simone\Programmierung\Language Processing Tools\ANTLR\Book Samples and Exercises\Exercise\1\output\Test.java Exception in thread "main" java.lang.NoClassDefFoundError: org/antlr/runtime/Cha rStream Caused by: java.lang.ClassNotFoundException: org.antlr.runtime.CharStream at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) Could not find the main class: Test. Program will exit. I'm using Windows 7 and Java 1.6_20. Can someone tell what is going on? Why will the interpreter not look in the jar-Archive I specified in the CLASSPATH? I found some kind of workaroud. I copied the antlr-3.2.jar into the directory where the Test.class is located and then executed: java -cp ./;antlr-3.2.jar Test This worked out. But I don't want to type the jar-Archive everytime I execute my test programs. Is there a possibility to tell the interpreter that he should automatically look into the archive?

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• MATLAB Builder NE crash apppool on IIS 7.5

  - by Alkersan

  Im developing a web user interface for MATLAB functions with ASP.NET. Ive started with studying demos and stucked with such problem. I created a MyComponent.dll assembly with deploytool from MATLAB 2010a, target framework - 3.5. This component has one function GetKnot() which returns a figure. function df = getKnot() f = figure('Visible', 'off'); knot; df = webfigure(f); close(f); end Then I made simple webapp in visual studio 2008 sp1, with only one page Default.aspx. I added references to MWArray.dll, WebFiguresService.dll and MyComponent.dll. The codeBehind is: using System; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using MyComponent; using MathWorks.MATLAB.NET.WebFigures; namespace MATLAB_WebApplication { public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { var myComponentClass = new MyComponentClass(); var x = myComponentClass.getKnot(); //WebFigureControl1.WebFigure = new WebFigure(); } } } When I run this page on Visual Studio`s Development web server - everything is fine, figure works. But when I`m trying to deploy webfigure on my local iis 7.5 which runs on Win7 x32 - iis app pool crashes. There is an entry in System Event Log "A process serving application pool 'Classic .NET AppPool' suffered a fatal communication error with the Windows Process Activation Service. The process id was '3676'. The data field contains the error number 6D000780". This happens when MyComponent is instantiating. What I could forget when moved to IIS? Other examples, like magic square console application, runs perfect, and every matlab component instantiating, but not in IIS environment.

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• Maven WTP webapp with maven-eclipse-plugin but without m2eclipse

  - by chrsk

  I use the eclipse:eclipse goal to generate an Eclipse Project environment. The deployment works fine. The goal creates the var classpath entries for all needed dependencies. With m2eclipse there was the Maven Container which defines an export folder which was WEB-INF/lib for me. But i don't want to rely on m2eclipse so i don't want to use it anymore. the class path entries which are generated by eclipse:eclipse goal don't have such a export folder. While booting the servlet container with WTP it publishes all resources and classes except the libraries to the context. Whats missing to publish the needed libs, or isn't that possible without m2eclipse integration? IDE Configuration Eclipse 3.5 JEE Galileo Maven 2 m2eclipse The maven-eclipse-plugin configuration <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-eclipse-plugin</artifactId> <version>2.8</version> <configuration> <projectNameTemplate>opensaga-[artifactId]</projectNameTemplate> <useProjectReferences>false</useProjectReferences> <downloadSources>false</downloadSources> <downloadJavadocs>false</downloadJavadocs> <wtpmanifest>true</wtpmanifest> <wtpversion>2.0</wtpversion> <wtpapplicationxml>true</wtpapplicationxml> <wtpContextName>opensaga-[artifactId]</wtpContextName> <additionalProjectFacets> <jst.java>5.0</jst.java> <jst.web>2.3</jst.web> </additionalProjectFacets> </configuration> </plugin>

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• Authlogic and functional tests - Authlogic::Session::Activation::NotActivatedError: You must activat

  - by adam

  Im getting the errors below despite following the documentation. In test_helper.rb ENV["RAILS_ENV"] = "test" require File.expand_path(File.dirname(__FILE__) + "/../config/environment") require "authlogic/test_case" require 'test_help' require 'shoulda' require File.dirname(__FILE__) + "/factories" In my functional test require 'test_helper' class SentencesControllerTest < ActionController::TestCase setup do :activate_authlogic end context "logged in" do setup do @user = Factory(:user) UserSession.create(@user.id) end context "on GET to :new" do setup do get :new end should "present form with text field" do assert_select('form#new_sentence') do assert_select('textarea#sentence_text') end end end end #context logged in. end in environments.rb config.gem "authlogic" Im not sure why it isnt working. Can anyone help out on this? Authlogic::Session::Activation::NotActivatedError: You must activate the Authlogic::Session::Base.controller with a controller object before creating objects authlogic (2.1.3) lib/authlogic/session/activation.rb:47:in `initialize' authlogic (2.1.3) lib/authlogic/session/klass.rb:64:in `initialize' authlogic (2.1.3) lib/authlogic/session/scopes.rb:79:in `initialize' authlogic (2.1.3) lib/authlogic/session/existence.rb:29:in `new' authlogic (2.1.3) lib/authlogic/session/existence.rb:29:in `create' test/functional/sentences_controller_test.rb:11:in `__bind_1270172858_922804' shoulda (2.10.3) lib/shoulda/context.rb:380:in `call' shoulda (2.10.3) lib/shoulda/context.rb:380:in `run_current_setup_blocks' shoulda (2.10.3) lib/shoulda/context.rb:379:in `each' shoulda (2.10.3) lib/shoulda/context.rb:379:in `run_current_setup_blocks' shoulda (2.10.3) lib/shoulda/context.rb:371:in `run_all_setup_blocks' shoulda (2.10.3) lib/shoulda/context.rb:375:in `run_parent_setup_blocks' shoulda (2.10.3) lib/shoulda/context.rb:359:in `test: logged in on GET to :new should present form with text field. ' /opt/rubymine/rb/testing/patch/testunit/test/unit/ui/testrunnermediator.rb:36:in `run_suite' /opt/rubymine/rb/testing/patch/testunit/test/unit/ui/teamcity/testrunner.rb:215:in `start_mediator' /opt/rubymine/rb/testing/patch/testunit/test/unit/ui/teamcity/testrunner.rb:191:in `start'

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• htaccess redirect http to https on a magento site

  - by joesalvator

  I have a magento site and i need to have it redirect to https, i have the cert installed but i am not sure how to mod the htaccess file? here is a copy of the root htaccess file thanks # uncomment these lines for CGI mode make sure to specify the correct cgi php binary file name it might be /cgi-bin/php-cgi Action php5-cgi /cgi-bin/php5-cgi AddHandler php5-cgi .php # GoDaddy specific options Options -MultiViews you might also need to add this line to php.ini cgi.fix_pathinfo = 1 if it still doesn't work, rename php.ini to php5.ini # this line is specific for 1and1 hosting #AddType x-mapp-php5 .php #AddHandler x-mapp-php5 .php # default index file DirectoryIndex index.php # adjust memory limit php_value memory_limit 64M php_value memory_limit 128M php_value max_execution_time 18000 # disable magic quotes for php request vars php_flag magic_quotes_gpc off # disable automatic session start before autoload was initialized php_flag session.auto_start off # enable resulting html compression #php_flag zlib.output_compression on # disable user agent verification to not break multiple image upload php_flag suhosin.session.cryptua off # turn off compatibility with PHP4 when dealing with objects php_flag zend.ze1_compatibility_mode Off # disable POST processing to not break multiple image upload SecFilterEngine Off SecFilterScanPOST Off # # Insert filter on all content ###SetOutputFilter DEFLATE # Insert filter on selected content types only #AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript # Netscape 4.x has some problems... #BrowserMatch ^Mozilla/4 gzip-only-text/html # Netscape 4.06-4.08 have some more problems #BrowserMatch ^Mozilla/4\.0[678] no-gzip # MSIE masquerades as Netscape, but it is fine #BrowserMatch \bMSIE !no-gzip !gzip-only-text/html # Don't compress images #SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png)$ no-gzip dont-vary # Make sure proxies don't deliver the wrong content #Header append Vary User-Agent env=!dont-vary # make HTTPS env vars available for CGI mode SSLOptions StdEnvVars # enable rewrites Options +FollowSymLinks RewriteEngine on # you can put here your magento root folder path relative to web root #RewriteBase /magento/ # workaround for HTTP authorization in CGI environment RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}] # always send 404 on missing files in these folders RewriteCond %{REQUEST_URI} !^/(media|skin|js)/ # never rewrite for existing files, directories and links RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_FILENAME} !-l # rewrite everything else to index.php RewriteRule .* index.php [L] # Prevent character encoding issues from server overrides If you still have problems, use the second line instead AddDefaultCharset Off #AddDefaultCharset UTF-8 # s ExpiresDefault "access plus 1 year" # By default allow all access Order allow,deny Allow from all

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• Setting up an efficient and effective development process

  - by christopher-mccann

  I am in the midst of setting up the development environment (PHP/MySQL) for my start-up. We use three sets of servers: LIVE - the servers which provide the actual application TEST - providing a testing version before it is actually released DEV - the development servers The development servers run SVN with each developer checking out their local copy. At the end of each day completed fixes are checked in and then we use Hudson to automate our build process and then transfer it over to TEST. We then check the application still functions correctly using a tester and then if everything is fine move it to LIVE. I am happy with this process but I do have two questions: How would you recommend we do local testing - as each developer adds new pages or changes functionality I want them to be able to test what they are doing. Would you just setup local Apache and a local database and have them test locally on their own machine? How would you recommend dealing with data layer changes? Is there anything else you would recommend doing to really make our development process as easy and efficient as possible? Thanks in advance

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• Rails: Single Table Inheritance and models subdirectories

  - by Chris

  I have a card-game application which makes use of Single Table Inheritance. I have a class Card, and a database table cards with column type, and a number of subclasses of Card (including class Foo < Card and class Bar < Card, for the sake of argument). As it happens, Foo is a card from the original printing of the game, which Bar is a card from an expansion. In an attempt to rationalise my models, I have created a directory structure like so: app/ + models/ + card.rb + base_game/ + foo.rb + expansion/ + bar.rb And modified environment.rb to contain: Rails::Initializer.run do |config| config.load_paths += Dir["#{RAILS_ROOT}/app/models/**"] end However, when my reads a card from the database, Rails throws the following exception: ActiveRecord::SubclassNotFound (The single-table inheritance mechanism failed to locate the subclass: 'Foo'. This error is raised because the column 'type' is reserved for storing the class in case of inheritance. Please rename this column if you didn't intend it to be used for storing the inheritance class or overwrite Card.inheritance_column to use another column for that information.) Is it possible to make this work, or am I doomed to a flat directory structure?

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• Remove appearance of TextField in droidText : Android

  - by AnujAroshA

  I am trying to create a PDF using droidText library. There I want to place some text content in the middle of the page but align to left. I was unable to do with Paragraph class and setAlignment() method. So I have decided to use TextField class. Below is the code I have used, Document document = new Document(PageSize.A4); try { PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(android.os.Environment.getExternalStorageDirectory() + java.io.File.separator + "TextFields.pdf")); document.open(); TextField tf = new TextField(writer, new Rectangle(100, 300, 200, 350), "Content"); tf.setText("This is the content of text field"); tf.setAlignment(Element.ALIGN_CENTER); tf.setOptions(TextField.MULTILINE | TextField.REQUIRED); PdfFormField field = tf.getTextField(); writer.addAnnotation(field); } catch (DocumentException de) { System.err.println(de.getMessage()); } catch (IOException ioe) { System.err.println(ioe.getMessage()); } document.close(); Code works perfect, but the out put PDF file that I am getting has this TextField which can be editable and also change the font appearance when I am click on the TextField. I don't want that in to my final PDF. How can I remove that attribute? If it is not possible, is there any other way I can position some text in a PDF file using droidText library in Android?

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• Large Django application layout

  - by Rob Golding

  I am in a team developing a web-based university portal, which will be based on Django. We are still in the exploratory stages, and I am trying to find the best way to lay the project/development environment out. My initial idea is to develop the system as a Django "app", which contains sub-applications to separate out the different parts of the system. The reason I intended to make these "sub" applications is that they would not have any use outside the parent application whatsoever, so there would be little point in distributing them separately. We envisage that the portal will be installed in multiple locations (at different universities, for example) so the main app can be dropped into a number of Django projects to install it. We therefore have a different repository for each location's project, which is really just a settings.py file defining the installed portal applications, and a urls.py routing the urls to it. I have started to write some initial code, though, and I've come up against a problem. Some of the code that handles user authentication and profiles seems to be without a home. It doesn't conceptually belong in the portal application as it doesn't relate to the portal's functionality. It also, however, can't go in the project repository - as I would then be duplicating the code over each location's repository. If I then discovered a bug in this code, for example, I would have to manually replicate the fix over all of the location's project files. My idea for a fix is to make all the project repos a fork of a "master" location project, so that I can pull any changes from that master. I think this is messy though, and it means that I have one more repository to look after. I'm looking for a better way to achieve this project. Can anyone recommend a solution or a similar example I can take a look at? The problem seems to be that I am developing a Django project rather than just a Django application.

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• How do I resolve no swt-cocoa-3557 or swt-cocoa in swt.library.path, java.library.path or the jar fi

  - by ?????

  I can't get a swt application to work on Mac OSX Snow Leopard. Exception in thread "main" java.lang.UnsatisfiedLinkError: no swt-cocoa-3557 or swt-cocoa in swt.library.path, java.library.path or the jar file at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source) at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source) at org.eclipse.swt.internal.C.<clinit>(Unknown Source) at org.eclipse.swt.internal.cocoa.NSThread.isMainThread(Unknown Source) at org.eclipse.swt.graphics.Device.<init>(Unknown Source) at org.eclipse.swt.widgets.Display.<init>(Unknown Source) at org.eclipse.swt.widgets.Display.<init>(Unknown Source) at com.astrobetty.geotag.Hello.main(Hello.java:12) I have added -Dswt.library.path= and -Djava.library.path statements to the "VM arrguments" hand have also tried setting them as variables in the "environment" section of the Eclipse run configuration page. I've verified that my .jar file is at the path I specify. If I look inside the .jar, it seems to contain these libraries: 102 Feb 12 13:21 META-INF 183 Feb 12 13:21 external.xpt 37104 Nov 17 2009 libswt-awt-cocoa-3557.jnilib 287228 Nov 17 2009 libswt-cocoa-3557.jnilib 548252 Nov 17 2009 libswt-pi-cocoa-3557.jnilib 313420 Nov 17 2009 libswt-xulrunner-cocoa-3557.jnilib 136 May 23 22:19 org 13 Feb 12 13:21 version.txt Any ideas on how to get this to work? Is it possible at all?

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• Iterating arrays in a batch file

  - by dboarman-FissureStudios

  I am writing a batch file (I asked a question on SU) to iterate over terminal servers searching for a specific user. So, I got the basic start of what I'm trying to do. Enter a user name Iterate terminal servers Display servers where user is found (they can be found on multiple servers now and again depending on how the connection is lost) Display a menu of options Iterating terminal servers I have: for /f "tokens=1" %%Q in ('query termserver') do (set __TermServers.%%Q) Now, I am getting the error... Environment variable __TermServers.SERVER1 not defined ...for each of the terminal servers. This is really the only thing in my batch file at this point. Any idea on why this error is occurring? Obviously, the variable is not defined, but I understood the SET command to do just that. I'm also thinking that in order to continue working on the iteration (each terminal server), I will need to do something like: :Search for /f "tokens=1" %%Q in ('query termserver') do (call Process) goto Break :Process for /f "tokens=1" %%U in ('query user %%username%% /server:%%Q') do (set __UserConnection = %%C) goto Search However, there are 2 things that bug me about this: Is the %%Q value still alive when calling Process? When I goto Search, will the for-loop be starting over? I'm doing this with the tools I have at my disposal, so as much as I'd like to hear about PowerShell and other ways to do this, it would be futile. I have notepad and that's it. Note: I would continue this line of questions on SuperUser, except that it seems to be getting more into programming specifics.

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• WCF selfhosted service, installer class and netsh

  - by jeho

  I have a selfhosted WCF service application which I want to deploy by a msi installer package. The endpoint uses http port 8888. In order to startup the project under windows 2008 after installation I have to either run the program as administrator or have to edit the http settings with netsh: "netsh http add urlacl url=http://+:8888/ user=\Everyone" I want to edit the http settings from my installer class. Therefore I call the following method from the Install() method: public void ModifyHttpSettings() { string parameter = @"http add urlacl url=http://+:8888/ user=\Everyone"; System.Diagnostics.ProcessStartInfo psi = new System.Diagnostics.ProcessStartInfo("netsh", parameter); psi.Verb = "runas"; psi.RedirectStandardOutput = false; psi.CreateNoWindow = true; psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden; psi.UseShellExecute = false; System.Diagnostics.Process.Start(psi); } This method will work for english versions of windows, but not for localized versions (The group Everyone has different names in localized versions). I have also tried to use Environment.UserName to allow access at least for the current logged on user. But this does also not work, because the installer class is run by the msi service which runs under the user SYSTEM. Hence Enviroment.UserName returns SYSTEM and that is not what I want. Is there a way to grant access to all (or at least for the current logged on) user to my selfhosted WCF service from a msi installer class?

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• How to use Sprockets Rails plugin on Heroku?

  - by Kevin

  Hi, I just deployed my Rails app to Heroku, but the Javascripts that were using Sprockets plugin don't work. I understood that, because my Heroku app is read-only, Sprockets won't work. I've found this sprockets_on_heroku plugin that should do the work, but I don't really get how to use it : I added config.gem sprockets in config/environment.rb I added sprockets in my .gems file I pushed these on Heroku and Sprockets was successfully installed I locally ran script/plugin install git://github.com/jeffrydegrande/sprockets_on_heroku.git and the plugin was successfully installed Nothing changed on Heroku, so I tried to install the plugin on Heroku with heroku plugins:install git://github.com/jeffrydegrande/sprockets_on_heroku.git, which returned sprockets_on_heroku installedbut then, a heroku restartor a heroku pluginscommand would return this: ~/.heroku/plugins/sprockets_on_heroku/init.rb:1: uninitialized constant ActionController (NameError) from /opt/local/lib/ruby/gems/1.8/gems/heroku-1.8.3/bin/../lib/heroku/plugin.rb:25:in `load' from /opt/local/lib/ruby/gems/1.8/gems/heroku-1.8.3/bin/../lib/heroku/plugin.rb:25:in `load!' from /opt/local/lib/ruby/gems/1.8/gems/heroku-1.8.3/bin/../lib/heroku/plugin.rb:22:in `each' from /opt/local/lib/ruby/gems/1.8/gems/heroku-1.8.3/bin/../lib/heroku/plugin.rb:22:in `load!' from /opt/local/lib/ruby/gems/1.8/gems/heroku-1.8.3/bin/../lib/heroku/command.rb:14:in `run' from /opt/local/lib/ruby/gems/1.8/gems/heroku-1.8.3/bin/heroku:14 from /opt/local/bin/heroku:19:in `load' from /opt/local/bin/heroku:19 What should I do? Kevin

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• MySQL performance - 100Mb ethernet vs 1Gb ethernet

  - by Rob Penridge

  Hi All I've just started a new job and noticed that the analysts computers are connected to the network at 100Mbps. The ODBC queries we run against the MySQL server can easily return 500MB+ and it seems at times when the servers are under high load the DBAs kill low priority jobs as they are taking too long to run. My question is this... How much of this server time is spent executing the request, and how much time is spent returning the data to the client? Could the query speeds be improved by upgrading the network connections to 1Gbps? (Updated for the why): The database in question was built to accomodate reporting needs and contains massive amounts of data. We usually work with subsets of this data at a granular level in external applications such as SAS or Excel, hence the reason for the large amounts of data being transmitted. The queries are not poorly structured - they are very simple and the appropriate joins/indexes etc are being used. I've removed 'query' from the Title of the post as I realised this question is more to do with general MySQL performance rather than query related performance. I was kind of hoping that someone with a Gigabit connection may be able to actually quantify some results for me here by running a query that returns a decent amount of data, then they could limit their connection speed to 100Mb and rerun the same query. Hopefully this could be done in an environment where loads are reasonably stable so as not to skew the results. If ethernet speed can improve the situation I wanted some quantifiable results to help argue my case for upgrading the network connections. Thanks Rob

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• maven and lift using scala 2.8 : lift-mapper missing?

  - by Bjorn J

  Newbie question since I'm not up to speed using maven at all. I'm trying to use scala + lift using scala 2.8, environment is a win7 box if that matters. I create a basic project using: mvn archetype:generate -U -DarchetypeGroupId=net.liftweb -DarchetypeArtifactId=lift-archetype-basic -DarchetypeVersion=2.0-scala280-SNAPSHOT -DarchetypeRepository=http://scala-tools.org/repo-snapshots -DremoteRepositories=http://scala-tools.org/repo-snapshots -DgroupId=com.liftworkshop -DartifactId=todo -Dversion=1.0-SNAPSHOT So far so good, but then, I try to cd into my new project and do: mvn jetty:run I after quite a few downloads end up with a error like below: [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] Failed to resolve artifact. Missing: ---------- 1) net.liftweb:lift-mapper:jar:2.0-scala280-SNAPSHOT Try downloading the file manually from the project website. Then, install it using the command: mvn install:install-file -DgroupId=net.liftweb -DartifactId=lift-mapper -D version=2.0-scala280-SNAPSHOT -Dpackaging=jar -Dfile=/path/to/file Alternatively, if you host your own repository you can deploy the file there: mvn deploy:deploy-file -DgroupId=net.liftweb -DartifactId=lift-mapper -Dve rsion=2.0-scala280-SNAPSHOT -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -Dr epositoryId=[id] Path to dependency: 1) com.liftworkshop:todo:war:1.0-SNAPSHOT 2) net.liftweb:lift-mapper:jar:2.0-scala280-SNAPSHOT ---------- 1 required artifact is missing. for artifact: com.liftworkshop:todo:war:1.0-SNAPSHOT from the specified remote repositories: scala-tools.snapshots (http://scala-tools.org/repo-snapshots), scala-tools.releases (http://scala-tools.org/repo-releases), central (http://repo1.maven.org/maven2) Any ideas?

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• createSQLXML() AbstractMethodError (with DB2XADataSource?)

  - by Mike

  Environment: WASCE 2.0.0.4 (aka geronimo 2.1) db2jcc4.jar 4.3.85 (tried 4.8.x as well) tranql-connector-db2-xa 1.4 (tried 1.5 as well) SQLXML xml = c.createSQLXML(); Struggling with java.lang.AbstractMethodError: java/sql/ResultSet.getSQLXML(I)Ljava/sql/SQLXML; at [snip] at javax.servlet.http.HttpServlet.service(HttpServlet.java:693) at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.geronimo.tomcat.valve.DefaultSubjectValve.invoke(DefaultSubjectValve.java:56) at org.apache.geronimo.tomcat.GeronimoStandardContext$SystemMethodValve.invoke(GeronimoStandardContext.java:406) at org.apache.geronimo.tomcat.valve.GeronimoBeforeAfterValve.invoke(GeronimoBeforeAfterValve.java:47) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:555) at org.apache.geronimo.tomcat.valve.ThreadCleanerValve.invoke(ThreadCleanerValve.java:40) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) at java.lang.Thread.run(Thread.java:736) It happens the connection handle is acquired via JNDI only. Works fine with the connection handle is acquired the traditional way. I made sure it is not a jar/version/classloading issue. got hints?

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• Web-based clients vs thick/rich clients?

  - by rudolfv

  My company is a software solutions provider to a major telecommunications company. The environment is currently IBM WebSphere-based with front-end IBM Portal servers talking to a cluster of back-end WebSphere Application Servers providing EJB services. Some of the portlets use our own home-grown MVC-pattern and some are written in JSF. Recently we did a proof-of-concept rich/thick-client application that communicates directly with the EJB's on the back-end servers. It was written in NetBeans Platform and uses the WebSphere application client library to establish communication with the EJB's. The really painful bit was getting the client to use secure JAAS/SSL communications. But, after that was resolved, we've found that the rich client has a number of advantages over the web-based portal client applications we've become accustomed to: Enormous performance advantage (CORBA vs. HTTP, cut out the Portal Server middle man) Development is simplified and faster due to use of NetBeans' visual designer and Swing's generally robust architecture The debug cycle is shortened by not having to deploy your client application to a test server No mishmash of technologies as with web-based development (Struts, JSF, JQuery, HTML, JSTL etc., etc.) After enduring the pain of web-based development (even JSF) for a while now, I've come to the following conclusion: Rich clients aren't right for every situation, but when you're developing an in-house intranet-based solution, then you'd be crazy not to consider NetBeans Platform or Eclipse RCP. Any comments/experiences with rich clients vs. web clients?

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• Microsoft Ajax Control Toolkit vs. jQuery

  - by Juri

  Hi, we are currently developing a couple of custom asp.net server controls. Now we'd like to add some Ajax support to some of them. Now basically there would be two options Microsoft Ajax & Microsoft Ajax Control Toolkit jQuery I worked already with the Control Toolkit, writing a complete Extender and it was quite intuitive, once you understand the story behind. But I also like the simplicity of jQuery. So I'd like to hear some of you what you would like to go for (advantages/disadvantages of each of them), considering also that we're mainly dealing with Microsoft technologies. Would you go more for the toolkit or jQuery,...or both? //Edit: I just made some tests and I have to admit that at the moment I find the Toolkit better due to the integration. My purpose is mainly for using it on the server controls, so with the toolkit I have corresponding classes on the server-side where I can do something like CalendarExtender toolkitCalendarExtender = new CalendarExtender(); toolkitCalendarExtender.TargetControlID.... ... this.Controls.Add(toolkitCalendarExtender); This is really nice because in this way I don't have to deal with rendering predefined JavaScript which I construct somehow as string inside my custom server control. With jQuery I would have to do so (except for the toolkit Nicolas mentioned, but the support there is too weak for using it in a professional environment) Thanks a lot.

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• Help/Questions About New Team Foundation Server 2010 Installation

  - by user579218

  Hello. Before starting down the TFS2010 installation process, I have a few questions I'm hoping the community can help me with. We're planning on a single-server installation of TFS2010. Initially, we want version/source control and build services, but not reporting or SharePoint. We may add reporting and SharePoint capabilities later. Our environment will be Windows Server 2008 R2 (x64), SQL Server 2008 R2 (x64), Office 2010 (x86), Visual Studio 6 and 2010, and, of course, Team Foundation Server 2010. Can I install TFS2010 on a server that is on our domain? It's not a domain controller, it's just a member server on the domain. Should I install TFS2010 before or after putting the server on the domain? We have six developers that will be logging into their local development computers (which are also on the same domain) using their domain user accounts, do I add each domain user to the TFS2010 server's security groups? If so, which one(s)? Can I or should I use a domain user account as the TFS2010 service account? Or, should I just use Network Service? The TFS2010 install guide notes that none of the service accounts should belong to the Administrators security group, so which security group(s) are recommended for the service account(s)? We're planning on using a local instance of SQL Server 2008 R2 Standard with TFS2010, what service account should we use? Should we use the same domain account as TFS2010 or Local System or ?? The TFS2010 install guide isn't very specific on this. Since we're planning on this server being both the version/source control and build server, should we install our development environments (VS6, VS2010, Access2010) before installing TFS2010? Or does it matter? Thanks in advance for answering these questions.

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• C: Running Unix configure file in Windows

  - by Shiftbit

  I would like to port a few applications that I use on Linux to Windows. In particular I have been working on wdiff. A program that compares the differences word by word of two files. Currently I have been able to successfully compile the program on windows through Cygwin. However, I would like to run the program natively on Windows similar to the Project: UnixUtils. How would I go about porting unix utilities on a windows environment? My possible guess it to manually create the ./configure file so that I can create a proper makefile. Am I on the right track? Has anyone had experience porting GNU software to windows? Update: I've compiled it on Code::Blocks and I get two errors: wdiff.c|226|error: `SIGPIPE' undeclared (first use in this function) readpipe.c:71: undefined reference to `_pipe' readpipe.c:74: undefined reference to `_fork This is a linux signal that is not supported by windows... equvilancy? wdiff.c|1198|error: `PRODUCT' undeclared (first use in this function)| this is in the configure.in file... hardcode would probably be the fastest solution... Outcome: MSYS took care of the configure problems, however MinGW couldnt solve the posix issues. I attempt to utilize pthreads as recommended by mrjoltcola. However, after several hours I couldnt get it to compile nor link using the provided libraries. I think if this had worked it would have been the solution I was after. Special mention to Michael Madsen for MSYS.

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• Deployed Qt5 Application Doesn't Print or Show Print Dialog

  - by MustacheMcLimey

  I'm experiencing Qt4 to Qt5 troubles. In my application when the user clicks the print button two things should happen, one is that a PDF gets written to disk (which still works fine in the new version, so I know that some of the printing functions are working properly) and the other is that a QPrintDialog should exec() and then send to a connected printer. I see the dialog when I launch from my development machine. The application launches on the deployed machine, but the QPrintDialog never shows and the document never prints. I am including print support. QT += core gui network webkitwidgets widgets printsupport I have been using Process Explorer to see what DLLs the application uses on my development machine, and I believe that everything is present. My application bundle includes: {myAppPath}\MyApp[MyApp.exe, Qt5PrintSupport.dll, ...] {myAppPath}\plugins\printsupport\windowsprintersupport.dll {myAppPath}\plugins\imageformats[ qgif.dll, qico.dll,qjpeg.dll, qmng.dll, qtga.dll, qtiff.dll, qwbmp.dll ] The following is the relevant code snippet: void PrintableForm::printFile() { //Writes the PDF to disk in every environment pdfCopy(); //Paper Copy only works on my dev machine QPrinter paperPrinter; QPrintDialog printDialog(&paperPrinter,this); if( printDialog.exec() == QDialog::Accepted ) { view->print(&paperPrinter); } this->accept(); } My first thought is that the relevant DLLs are not being found come print time, and that means that my application file system is incorrect, but I have not found anything that shows me a different file structure. Am I on the right track or is there something else wrong with this setup?

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• PyDev and Django: PyDev breaking Django shell?

  - by Rosarch

  I've set up a new project, and populated it with simple models. (Essentially I'm following the tut.) When I run python manage.py shell on the command line, it works fine: >python manage.py shell Python 2.6.4 (r264:75708, Oct 26 2009, 08:23:19) [MSC v.1500 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. (InteractiveConsole) >>> from mysite.myapp.models import School >>> School.objects.all() [] Works great. Then, I try to do the same thing in Eclipse (using a Django project that is composed of the same files.) Right click on mysite project Django Shell with Django environment This is the output from the PyDev Console: >>> import sys; print('%s %s' % (sys.executable or sys.platform, sys.version)) C:\Python26\python.exe 2.6.4 (r264:75708, Oct 26 2009, 08:23:19) [MSC v.1500 32 bit (Intel)] >>> >>> from django.core import management;import mysite.settings as settings;management.setup_environ(settings) 'path\\to\\mysite' >>> from mysite.myapp.models import School >>> School.objects.all() Traceback (most recent call last): File "<console>", line 1, in <module> File "C:\Python26\lib\site-packages\django\db\models\query.py", line 68, in __repr__ data = list(self[:REPR_OUTPUT_SIZE + 1]) File "C:\Python26\lib\site-packages\django\db\models\query.py", line 83, in __len__ self._result_cache.extend(list(self._iter)) File "C:\Python26\lib\site-packages\django\db\models\query.py", line 238, in iterator for row in self.query.results_iter(): File "C:\Python26\lib\site-packages\django\db\models\sql\query.py", line 287, in results_iter for rows in self.execute_sql(MULTI): File "C:\Python26\lib\site-packages\django\db\models\sql\query.py", line 2368, in execute_sql cursor = self.connection.cursor() File "C:\Python26\lib\site-packages\django\db\backends\__init__.py", line 81, in cursor cursor = self._cursor() File "C:\Python26\lib\site-packages\django\db\backends\sqlite3\base.py", line 170, in _cursor self.connection = Database.connect(**kwargs) OperationalError: unable to open database file What am I doing wrong here?

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• Ruby through RVM fails

  - by TheLQ

  In constant battle to install Ruby 1.9.2 on an RPM system (OS is based off of CentOS), I'm trying again with RVM. So once I install it, I then try to use it: [root@quackwall ~]# rvm use 1.9.2 Using /usr/local/rvm/gems/ruby-1.9.2-p136 [root@quackwall ~]# ruby bash: ruby: command not found [root@quackwall ~]# which ruby /usr/bin/which: no ruby in (/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin) Now that's interesting; rvm info says something completely different: [root@quackwall bin]# rvm info ruby-1.9.2-p136: system: uname: "Linux quackwall.highwow.lan 2.6.18-194.8.1.v5 #1 SMP Thu Jul 15 01:14:04 EDT 2010 i686 i686 i386 GNU/Linux" bash: "/bin/bash => GNU bash, version 3.2.25(1)-release (i686-redhat-linux-gnu)" zsh: " => not installed" rvm: version: "rvm 1.2.2 by Wayne E. Seguin ([email protected]) [http://rvm.beginrescueend.com/]" ruby: interpreter: "ruby" version: "1.9.2p136" date: "2010-12-25" platform: "i686-linux" patchlevel: "2010-12-25 revision 30365" full_version: "ruby 1.9.2p136 (2010-12-25 revision 30365) [i686-linux]" homes: gem: "/usr/local/rvm/gems/ruby-1.9.2-p136" ruby: "/usr/local/rvm/rubies/ruby-1.9.2-p136" binaries: ruby: "/usr/local/rvm/rubies/ruby-1.9.2-p136/bin/ruby" irb: "/usr/local/rvm/rubies/ruby-1.9.2-p136/bin/irb" gem: "/usr/local/rvm/rubies/ruby-1.9.2-p136/bin/gem" rake: "/usr/local/rvm/gems/ruby-1.9.2-p136/bin/rake" environment: PATH: "/usr/local/rvm/gems/ruby-1.9.2-p136/bin:/usr/local/rvm/gems/ruby-1.9.2-p136@global/bin:/usr/local/rvm/rubies/ruby-1.9.2-p136/bin:bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin:/usr/local/rvm/bin" GEM_HOME: "/usr/local/rvm/gems/ruby-1.9.2-p136" GEM_PATH: "/usr/local/rvm/gems/ruby-1.9.2-p136:/usr/local/rvm/gems/ruby-1.9.2-p136@global" MY_RUBY_HOME: "/usr/local/rvm/rubies/ruby-1.9.2-p136" IRBRC: "/usr/local/rvm/rubies/ruby-1.9.2-p136/.irbrc" RUBYOPT: "" gemset: "" So I have RVM that says one thing and bash which says another. Any suggestions on how to get this working?

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• What is the worst programming language you ever worked with? [closed]

  - by Ludwig Weinzierl

  If you have an interesting story to share, please post an answer, but do not abuse this question for bashing a language. We are programmers, and our primary tool is the programming language we use. While there is a lot of discussion about the best one, I'd like to hear your stories about the worst programming languages you ever worked with and I'd like to know exactly what annoyed you. I'd like to collect this stories partly to avoid common pitfalls while designing a language (especially a DSL) and partly to avoid quirky languages in the future in general. This question is not subjective. If a language supports only single character identifiers (see my own answer) this is bad in a non-debatable way. EDIT Some people have raised concerns that this question attracts trolls. Wading through all your answers made one thing clear. The large majority of answers is appropriate, useful and well written. UPDATE 2009-07-01 19:15 GMT The language overview is now complete, covering 103 different languages from 102 answers. I decided to be lax about what counts as a programming language and included anything reasonable. Thank you David for your comments on this. Here are all programming languages covered so far (alphabetical order, linked with answer, new entries in bold): ABAP, all 20th century languages, all drag and drop languages, all proprietary languages, APF, APL (1), AS400, Authorware, Autohotkey, BancaStar, BASIC, Bourne Shell, Brainfuck, C++, Centura Team Developer, Cobol (1), Cold Fusion, Coldfusion, CRM114, Crystal Syntax, CSS, Dataflex 2.3, DB/c DX, dbase II, DCL, Delphi IDE, Doors DXL, DOS batch (1), Excel Macro language, FileMaker, FOCUS, Forth, FORTRAN, FORTRAN 77, HTML, Illustra web blade, Informix 4th Generation Language, Informix Universal Server web blade, INTERCAL, Java, JavaScript (1), JCL (1), karol, LabTalk, Labview, Lingo, LISP, Logo, LOLCODE, LotusScript, m4, Magic II, Makefiles, MapBasic, MaxScript, Meditech Magic, MEL, mIRC Script, MS Access, MUMPS, Oberon, object extensions to C, Objective-C, OPS5, Oz, Perl (1), PHP, PL/SQL, PowerDynamo, PROGRESS 4GL, prova, PS-FOCUS, Python, Regular Expressions, RPG, RPG II, Scheme, ScriptMaker, sendmail.conf, Smalltalk, Smalltalk , SNOBOL, SpeedScript, Sybase PowerBuilder, Symbian C++, System RPL, TCL, TECO, The Visual Software Environment, Tiny praat, TransCAD, troff, uBasic, VB6 (1), VBScript (1), VDF4, Vimscript, Visual Basic (1), Visual C++, Visual Foxpro, VSE, Webspeed, XSLT The answers covering 80386 assembler, VB6 and VBScript have been removed.

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