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• java.lang.ClassNotFoundException

  - by user341493

  Hey everyone, I have a java project that I'm working on which was working until a few days ago. I'm not sure what I did to my Eclipse set-up to hose it but now I'm getting a java.lang.ClassNotFoundException when I try to run some code that accesses the google finance api. I've built a small test application that uses the google finance api on its own and that seems to work. So, I think this is a project specific problem. Any help would be greatly appreciated. Here's the stack trace: `ptolemy.kernel.util.IllegalActionException: in .RandomSearch.manager Because: com/google/common/collect/Maps at ptolemy.actor.Manager.execute(Manager.java:472) at ptolemy.actor.Manager.run(Manager.java:1119) at ptolemy.actor.Manager$3.run(Manager.java:1160) Caused by: java.lang.NoClassDefFoundError: com/google/common/collect/Maps at com.google.gdata.wireformats.AltRegistry.(AltRegistry.java:118) at com.google.gdata.wireformats.AltRegistry.(AltRegistry.java:100) at com.google.gdata.client.Service.(Service.java:546) at AtomicBroadcast.GoogleFinance.GooglePortfolioReader.fire(GooglePortfolioReader.java:108) at ptolemy.domains.de.kernel.DEDirector.fire(DEDirector.java:568) at ptolemy.actor.CompositeActor.fire(CompositeActor.java:458) at ptolemy.actor.Manager.iterate(Manager.java:714) at ptolemy.actor.Manager.execute(Manager.java:349) ... 2 more Caused by: java.lang.ClassNotFoundException: com.google.common.collect.Maps at java.net.URLClassLoader$1.run(URLClassLoader.java:217) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:205) at java.lang.ClassLoader.loadClass(ClassLoader.java:319) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294) at java.lang.ClassLoader.loadClass(ClassLoader.java:264) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:332) ... 10 more Caused by: java.lang.NoClassDefFoundError: com/google/common/collect/Maps at com.google.gdata.wireformats.AltRegistry.(AltRegistry.java:118) at com.google.gdata.wireformats.AltRegistry.(AltRegistry.java:100) at com.google.gdata.client.Service.(Service.java:546) at AtomicBroadcast.GoogleFinance.GooglePortfolioReader.fire(GooglePortfolioReader.java:108) at ptolemy.domains.de.kernel.DEDirector.fire(DEDirector.java:568) at ptolemy.actor.CompositeActor.fire(CompositeActor.java:458) at ptolemy.actor.Manager.iterate(Manager.java:714) at ptolemy.actor.Manager.execute(Manager.java:349) at ptolemy.actor.Manager.run(Manager.java:1119) at ptolemy.actor.Manager$3.run(Manager.java:1160) Caused by: java.lang.ClassNotFoundException: com.google.common.collect.Maps at java.net.URLClassLoader$1.run(URLClassLoader.java:217) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:205) at java.lang.ClassLoader.loadClass(ClassLoader.java:319) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294) at java.lang.ClassLoader.loadClass(ClassLoader.java:264) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:332) ... 10 more`

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• How to exploit Diffie-hellman to perform a man in the middle attack

  - by jfisk

  Im doing a project where Alice and Bob send each other messages using the Diffie-Hellman key-exchange. What is throwing me for a loop is how to incorporate the certificate they are using in this so i can obtain their secret messages. From what I understand about MIM attakcs, the MIM acts as an imposter as seen on this diagram: Below are the details for my project. I understand that they both have g and p agreed upon before communicating, but how would I be able to implement this with they both having a certificate to verify their signatures? Alice prepares ?signA(NA, Bob), pkA, certA? where signA is the digital signature algorithm used by Alice, “Bob” is Bob’s name, pkA is the public-key of Alice which equals gx mod p encoded according to X.509 for a fixed g, p as specified in the Diffie-Hellman key- exchange and certA is the certificate of Alice that contains Alice’s public-key that verifies the signature; Finally, NA is a nonce (random string) that is 8 bytes long. Bob checks Alice's signature, and response with ?signB{NA,NB,Alice},pkB,certB?. Alice gets the message she checks her nonce NA and calculates the joint key based on pkA, pkB according to the Diffie-Hellman key exchange. Then Alice submits the message ?signA{NA,NB,Bob},EK(MA),certA? to Bob and Bobrespondswith?SignB{NA,NB,Alice},EK(MB),certB?. where MA and MB are their corresponding secret messages.

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• marquee text view in android

  - by raqz

  i tried various combinations as answered here in SO...but i am still not able to get the text to marquee... combination 1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:id="@+id/organizationText" android:layout_height="38px" android:gravity="center_horizontal" android:textColor="#0099CC" android:layout_gravity="center" android:textSize="08pt" android:layout_width="wrap_content" android:maxLines="1" android:ellipsize="marquee" android:fadingEdge="horizontal" android:marqueeRepeatLimit="marquee_forever" android:scrollHorizontally="true" android:focusable="true" android:focusableInTouchMode="true" /> </RelativeLayout> orgText.setSelected(true); orgText.setEllipsize(TruncateAt.MARQUEE); orgText.setText(organization); I tried without using setSelected but it still doesnt work. any help would be appreciated... also, this entire view is a part of Linear layout.

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• nHibernate Domain Model and Mapping Files in Separate Projects

  - by Blake Blackwell

  Is there a way to separate out the domain objects and mapping files into two separate projects? I would like to create one project called MyCompany.MyProduct.Core that contains my domain model, and another project that is called MyCompany.MYProduct.Data.Oracle that contains my Oracle data mappings. However, when I try to unit test this I get the following error message: Named query 'GetClients' not found. Here is my mapping file: <hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="MyCompany.MyProduct.Core" namespace="MyCompany.MyProduct.Core" > <class name="MyCompany.MyProduct.Core.Client" table="MY_CLIENT" lazy="false"> <id name="ClientId" column="ClientId"></id> <property name="ClientName" column="ClientName" /> <loader query-ref="GetClients"/> </class> <sql-query name="GetClients" callable="true"> <return class="Client" /> call procedure MyPackage.GetClients(:int_SummitGroupId) </sql-query> </hibernate-mapping> Here is my unit test: try { var cfg = new Configuration(); cfg.Configure(); cfg.AddAssembly( typeof( Client ).Assembly ); ISessionFactory sessionFactory = cfg.BuildSessionFactory(); IStatelessSession session = sessionFactory.OpenStatelessSession(); IQuery query = session.GetNamedQuery( "GetClients" ); query.SetParameter( "int_SummitGroupId", 3173 ); IList<Client> clients = query.List<Client>(); Assert.AreNotEqual( 0, clients.Count ); } catch( Exception ex ) { throw ex; } I think I may be improperly referencing the assembly, because if I do put the domain model object in the MyComapny.MyProduct.Data.Oracle class it works. Only when I separate out in to two projects do I run into this problem.

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• function's return address is different from its supposed value, buffer overflow,

  - by ultrajohn

  Good day everyone! I’m trying to understand how buffer overflow works. I’m doing this for my project in a computer security course I’m taking. Right now, I’m in the process of determining the address of the function’s return address which I’m supposed to change to perform a buffer overflow attack. I’ve written a simple program based from an example I’ve read in the internet. What this program does is it creates an integer pointer that will be made to point to the address of the function return address in the stack. To do this, (granted I understand how a function/program variables get organized in the stack), I add 8 to the buffer variable’ address and set it as the value of ret. I’m not doing anything here that would change the address contained in the location of func’s return address. here's the program: Output of the program when gets excecuted: As you can see, I’m printing the address of the variables buffer and ret. I’ve added an additional statement printing the value of the ret variable (supposed location of func return address, so this should print the address of the next instruction which will get executed after func returns from execution). Here is the dump which shows the supposed address of the instruction to be executed after func returns. (Underlined in green) As you can see, that value is way different from the value printed contained in the variable ret. My question is, why are they different? (of course in the assumption that what I’ve done are all right). Else, what have I done wrong? Is my understanding of the program’s runtime stack wrong? Please, help me understand this. My project is due nextweek and I’ve barely touched it yet. I’m sorry if I’m being demanding, I badly need your help.

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• Using the MVVM Light Toolkit to make Blendable applications

  - by Dave

  A while ago, I posted a question regarding switching between a Blend-authored GUI and a Visual Studio-authored one. I got it to work okay by adding my Blend project to my VS2008 project and then changing the Startup Application and recompiling. This would result in two applications that had completely different GUIs, yet used the exact same ViewModel and Model code. I was pretty happy with that. Now that I've learned about the Laurent Bugnion's MVVM Light Toolkit, I would really like to leverage his efforts to make this process of supporting multiple GUIs for the same backend code possible. The question is, does the toolkit facilate this, or am I stuck doing it my previous way? I've watched his video from MIX10 and have read some of the articles about it online. However, I've yet to see something that indicates that there is a clean way to allow a user to either dynamically switch GUIs on the fly by loading a different DLL. There are MVVM templates for VS2008 and Blend 3, but am I supposed to create both types of projects for my application and then reference specific files from my VS2008 solution? UPDATE I re-read some information on Laurent's site, and seemed to have forgotten that the whole point of the template was to allow the same solution to be opened in VS2008 and Blend. So anyhow, with this new perspective it looks like the templates are actually intended to use a single GUI, most likely designed entirely in Blend (with the convenience of debugging through VS2008), and then be able to use two different ViewModels -- one for design-time, and one for runtime. So it seems to me like the answer to my question is that I want to use a combination of my previous solution, along with the MVVM Light Toolkit. The former will allow me to make multiple, distinct GUIs around my core code, while the latter will make designing fancy GUIs in Blend easier with the usage of a design-time ViewModel. Can anyone comment on this?

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• How can I get the correct DisplayMetrics from an AppWidget in Android?

  - by Gary

  I need to determine the screen density at runtime in an Android AppWidget. I've set up an HDPI emulator device (avd). If set up a regular executable project, and insert this code into the onCreate method: DisplayMetrics dm = getResources().getDisplayMetrics(); Log.d("MyTag", "screen density " + dm.densityDpi); This outputs "screen density 240" as expected. However, if I set up an AppWidget project, and insert this code into the onUpdate method: DisplayMetrics dm = context.getResources().getDisplayMetrics(); Log.d("MyTag", "screen density " + dm.densityDpi); This outputs "screen density 160". I noticed, hooking up the debugger, that the mDefaultDisplay member of the Resources object here is null in the AppWidget case. Similarly, if I get a resource at runtime using the Resources object obtained from context.getResources() in the AppWidget, it returns the wrong resource based on screen density. For instance, I have a 60x60px drawable for mdpi, and an 80x80 drawable for hdpi. If I get this Drawable object using context.getResources().getDrawable(...), it returns the 60x60 version. Is there any way to correctly deal with resources at runtime from the context of an AppWidget? Thanks!

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• How to use Struts2-jQuery Plugin with sitemesh

  - by fayway

  Hi I have this error when I try to include the tag (http://code.google.com/p/struts2-jquery/wiki/HeadTag) in a sitemesh decorator main.jsp (decorator) <%@ taglib uri="http://www.opensymphony.com/sitemesh/decorator" prefix="decorator" %> <%@ taglib prefix="s" uri="/struts-tags"%> <%@ taglib prefix="sj" uri="/struts-jquery-tags"%> <!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"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>My Project- <decorator:title /></title> <sj:head compressed="false" jqueryui="true"></sj:head> </head> <body> <!-- head --> .... Tomcat Error exception java.lang.RuntimeException: org.apache.jasper.JasperException: An exception occurred processing JSP page /decorators/main.jsp at line 11 8: <head> 9: <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> 10: <title>My Project- <decorator:title /></title> 11: <sj:head compressed="false" jqueryui="true"></sj:head> 12: </head> 13: <body> 14: <!-- head --> Stacktrace: com.opensymphony.sitemesh.webapp.decorator.BaseWebAppDecorator.render(BaseWebAppDecorator.java:39) com.opensymphony.sitemesh.webapp.SiteMeshFilter.doFilter(SiteMeshFilter.java:84) Please any idea ? Thanks in advance

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• php -i | find "extension_dir" don't take effect after modified its value

  - by tunpishuang

  i wanna using curl in php script and run it in command line mode. here is the script <?php //enable_dl("php_curl.dll"); $ch = curl_init(); $options=array( CURLOPT_URL=>"http://test.com/wp-content/themes/bluefocus/images/desc_img.jpg", CURLOPT_BINARYTRANSFER=>true, CURLOPT_VERBOSE=>true ); curl_setopt_array($ch,$options); $data = curl_exec($ch); $fp=fopen("test.jpg","w"); fwrite($fp,$data); curl_close($ch); ?> i run it in cmd with command php -i test.php the error message: D:\project>php get.php Fatal error: Call to undefined function curl_init() in D:\project\gals_curl_batch_download\get.php on line 3 phpinfo() in the webpage output shows curl has been enabled cURL support enabled cURL Information libcurl/7.19.4 OpenSSL/0.9.8k zlib/1.2.3 and here is the strange thing phpinfo() int the webpage output show, infact extension enabled in php.ini can be run in web page. the exact directory of the extension is under ./ext extension_dir ./ext ./ext but php -i | find "extension_dir" always show this and can't be modified with in php.ini file extension_dir => C:\php5 => C:\php5 restarted apache serveral times, keeps the same error. so i wonder why the value of extension_dir can't be modified. thx in advance.

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• classpath error when executing a jar by ant

  - by changed

  Hi I am trying to execute a jar file created using ant. But i am not able to find out why libraries are not available while executing jar. I am trying to load derby embedded database driver but some how i am not getting derby.jar in classpath. Error that i am getting is [java] Unable to load the JDBC driver org.apache.derby.jdbc.EmbeddedDriver [java] Please check your CLASSPATH. [java] java.lang.ClassNotFoundExcepApplication Started [java] tion: org.apache.derby.jdbc.EmbeddedDriver [java] at java.net.URLClassLoader$1.run(URLClassLoader.java:200) a <path id="jar.classpath"> <fileset dir="${lib.dir}" includes="*.jar" /> </path> <path id="compiled-src.jar.classpath"> <path refid="jar.classpath" /> <pathelement location="${build.classes.dir}" /> </path> <target name="jar" depends="compile-src" description="Create Jar"> <mkdir dir="${dist.dir}" /> <manifestclasspath property="lib.list" jarfile="${dist.dir}/"> <classpath refid="jar.classpath" /> </manifestclasspath> <jar destfile="${dist.dir}/${ant.project.name}.jar" basedir="${build.classes.dir}" > <manifest> <attribute name="Main-Class" value="${main-class}" /> <attribute name="Class-Path" value="${lib.list}" /> </manifest> </jar> </target> <target name="run" depends="jar" description="Run application from jar"> <java jar="${dist.dir}/${ant.project.name}.jar" fork="true" /> </target>

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• Netbeans and EOF

  - by sqlnoob

  Hey there, Java, ANTLR and Netbeans newbie here. I have installed a jdk and netbeans. I started a new project on netbeans 6.8 and i have added the antlr-3.2.jar as a library. I also created a lexer and parser class using AntlrWorks. These classes are named ExprParser.java and ExprLexer.java. I copied them into a directory named path-to-netbeans-project/src/parsers. I have a main file: package javaapplication2; import org.antlr.runtime.*; import parsers.*; public class Main { public static void main(String[] args) throws Exception{ ANTLRInputStream input = new ANTLRInputStream(System.in); ExprLexer lexer = new ExprLexer(input); CommonTokenStream tokens = new CommonTokenStream(lexer); ExprParser parser = new ExprParser(tokens); parser.prog(); } } The application builds fine. The book I'm reading says I should run the program and type in some stuff and then press Ctrl+Z (I'm on windows) to send EOF to the console. Problem is that nothing happens when I press Ctrl+z in the netbeans console. When I run from the command line, ctrl+z works fine. This is probably WAY too much information, but I can't figure it out. Sorry. Probably not a good idea to learn 3 new technologies at once.

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• FluentNHibernate Overrides: UseOverridesFromAssemblyOf non-generic version

  - by ThiagoAlves

  Hi, I have a repository class that inherits from a generic implementation: public namespace RepositoryImplementation { public class PersonRepository : Web.Generics.GenericNHibernateRepository<Person> } The generic repository implementation uses Fluent NHibernate conventions. They're working fine. One of those conventions is that all properties are not nullable. Now I need to define that specific properties may be nullable outside the conventions. Fluent NHibernate has an interesting override mechanism: public namespace RepositoryImplementation { public class PersonMappingOverride : IAutoMappingOverride<Person> { public void Override(FluentNHibernate.Automapping.AutoMapping<Funcionario> mapping) { mapping.Map(x => x.PhoneNumber).Nullable(); } } } Now I need to register the override class into Fluent NHibernate. I have the following code in the Web.Generics.GenericNHibernateRepository generic class: AutoMap.AssemblyOf<Person>() .Where(type => type.Namespace == "Entities") .UseOverridesFromAssemblyOf<PersonMappingOverride>(); The problem is: UseOverridesFromAssemblyOf is a generic method, and I can't do something like that: .UseOverridesFromAssemblyOf<PersonMappingOverride>(); Because that would cause a circular reference. I don't want the generic repository to know the either repository or the mapping override class, because they vary from project to project. I see another solution: in the GenericNHibernateRepository class I can do this.GetType() and get the repository implementation type (e.g.: PersonRepository). However I can't call UseOverridesFromAssemblyOf() passing a type. Is there another way to configure overrides in FluentNHibernate? If not, how could I call UseOverridesFromAssemblyOf<T> without making the generic repository depend upon the repository implementation or the mapping override class? (Source: http://wiki.fluentnhibernate.org/Auto_mapping#Overrides)

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• Nested URLs and Rewrite rules in Apache2

  - by Radha Krishna. S.

  Hi, I need some help with rewrite rules and nested URLs. I am using TikiWiki for my website and am in the process of setting up SE friendly URLs for my projects. Specifically, I have the following rewrite rule for www.example.com/projects to point to a page that lists out all the projects hosted in example. RewriteRule ^Projects$ articles?type=Project [L] This works fine. Now, I would like to point www.example.com/projects/project1 to point to a specific project. I have this rewrite rule RewriteRule ^(Projects/Project1)$ tiki-read_article.php?articleId=6 This works, but partially. The content is all rendered as text but the theme - images/ css etc all go for a toss - the page is completely in text. I understand that this happens 'cause the relative paths in the theme/ css/ images all refer to Projects as the base folder instead of the root of the website. I don't want to touch the CMS portion - change the theme/ css/ image paths in the files, more for reasons of upgradability. Can someone help me understand and write a rule so that the above nested URL works? Regards, Radha

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• Hudson plugin, Java error "... disagree on InnerClasses attribute"

  - by StackedCrooked

  I am trying to be able to step through the code of a Hudson plugin called SVNPublisher. I checked out the code for SVNPublisher, used Netbeans to open the project, and clicked "Debug Main project". This results in a Firefox window opening address http://localhost:8080 which shows the Hudson main page. Clicking the "New Job" link results in an error page: HTTP ERROR: 500 jar:file:/home/francis/svn/svnpublisher/target/work/webapp/WEB-INF/lib/hudson-core-1.319.jar!/lib/hudson/newFromList/form.jelly:43:47: <j:forEach> hudson.scm.SubversionTagAction and hudson.scm.SubversionTagAction$DescriptorImpl disagree on InnerClasses attribute RequestURI=/newJob Caused by: org.apache.commons.jelly.JellyTagException: jar:file:/home/francis/svn/svnpublisher/target/work/webapp/WEB-INF/lib/hudson-core-1.319.jar!/lib/hudson/newFromList/form.jelly:43:47: hudson.scm.SubversionTagAction and hudson.scm.SubversionTagAction$DescriptorImpl disagree on InnerClasses attribute at org.apache.commons.jelly.impl.TagScript.handleException(TagScript.java:713) at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:282) at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:95) ... I am very new to Hudson and not very experienced with Java so I'm pretty much clueless on the meaning of this error. Can anyone help?

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• Disable Flex CSS type selector warning?

  - by davr

  I'm building a somewhat large Flex project that includes several modules (a single Flex project that produces multiple SWFs) Right now, I have a single css file, being loaded in the main SWF tag: <s:Application ... > <fx:Style source="css/main.css" /> ... </s:Application> In the CSS file: /* CSS file */ @namespace s "library://ns.adobe.com/flex/spark"; s|Panel { skinClass: ClassReference("com.skins.DefaultPanelSkin"); } s|Button { skinClass: ClassReference("com.skins.DefaultButtonSkin"); } The CSS file is not referenced anywhere else. I have currently 6 modules (plus the main SWF, a total of 7 SWFs). I've noticed that the number of warnings is correlated to the number of modules...every time I add a module, I get more warnings. Right now, I get 6 warnings for every entry in the CSS file, so: CSS type selectors are not supported in components: 'Panel' CSS type selectors are not supported in components: 'Panel' CSS type selectors are not supported in components: 'Panel' CSS type selectors are not supported in components: 'Panel' CSS type selectors are not supported in components: 'Panel' CSS type selectors are not supported in components: 'Panel' And repeat for Button, TextArea, etc etc. I have so many useless warnings, it is impossible to see if there are any valid ones. Is this warning caused by something I'm doing wrong? The styles are all being applied correctly and appears to work just the way I want at runtime. If I'm doing nothing wrong, can I tell the compiler to ignore this warning? NOTE: I've tried the -show-unused-type-selector-warnings=false compiler flag, and it does not work...that's for a similar but different warning.

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• When does MSBuild set the $(ProjectName) property?

  - by bwerks

  I'm fairly new to MSBuild, and I've done some customization on a Wpf project file that I'm building both in VS2010 and TFS2010. I've customized the output path as follows: <OutputPath Condition=" '$(TeamBuildOutDir)' == '' ">$(SolutionDir)build\binaries\$(ProjectName)\$(Configuration)\$(Platform)</OutputPath> <OutputPath Condition=" '$(TeamBuildOutDir)' != '' ">$(TeamBuildOutDir)binaries\$(ProjectName)\$(Configuration)\$(Platform)</OutputPath> This allows me to build to a centralized binaries directory when building on the desktop, and allows TFS to find the binaries when CI builds are running. However, it seems that in both cases, the $(ProjectDir) property is evaluating to '' at buildtime, which creates strange results. Doing some debugging, it appears as if $(ProjectName) is set by the time BeforeBuild executes, but that my OutputPath property is evaluating it prior to that point. <ProjectNameUsedTooEarly Condition=" '$(ProjectName)' == '' ">true</ProjectNameUsedTooEarly> The preceeding property is in the same property group as my OutputPath property. In the BeforeBuild target, $(ProjectNameUsedTooEarly) evaluates to true, but $(ProjectName) evaluates to the project name as normal by that point. What can I do to ensure that $(ProjectName) has got a value when I use it? edit: I just used Attrice's MSBuild Sidekick to debug through my build file, and in the very first target available for breakpoint (_CheckForInvalidConfigurationAndPlatform) all the properties seem to be set already. ProjectName is already set correctly, but my OutputPath property has already been set using the blank value of ProjectName.

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• asp.net mvc json 2 times post to the controller

  - by mazhar kaunain baig

  function onTestComplete(content) { var url = '<%= Url.Action("JsonTest","Organization") %>'; $.post(url, null, function(data) { alert(data["name"]); alert(data["ee"]); }); } <% using (Ajax.BeginForm("JsonTest", new AjaxOptions() { HttpMethod = "POST", OnComplete = "onTestComplete" })) { %> <%= Html.TextBox("name") %><br /> <input type="submit" /> <% } % controller:` [HttpPost] public ActionResult JsonTest() { var data = new { name = "TestName",ee="aaa" }; return Json(data); }` Due to some reason When I click on the button (My Break point is in the controller jsontest method) The jsontest is called twice(that's the real problem).I want to call it once as usual,using Ajax.BeginForm( "", new AjaxOptions { HttpMethod = "POST", OnComplete = "onTestComplete" })) I am able to call it once but it doesn't post the values to the controller.

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• Which knowledge base/rule-based inference engine to choose for real time Runway incursion prevention

  - by Piligrim

  Hello, we are designing a project that would listen to dialog between airport controllers and pilots to prevent runway incursions (eg. one airplane is taking off while other is crossing the runway). Our professor wants us to use Jena for knowledge base (or anything else but it should be some sort of rule-based engine). Inference is not the main thing in Jena and there's not much documentation and examples of this. So we need an engine that would get messages from pilots as input and output possible risks of incursion or any other error in message protocol. It should be easy to write rules, and should be easy to provide engine with real time data. I image it something like this: A pilot sends a message that he lands on some runway, the system remembers that the runway is busy and no one should cross it If someone is given an instruction to cross this runway, the engine should fire a rule that something is wrong When the pilot sends a message that he left the runway and goes to the gate, the system clears the runway and lets other planes to use it. So is Jena, or prolog or any other rules engine suitable for this? I mean it is suitable, but do we really need to use it? I asked the prof. if we could just keep state of the runway and use some simple checks based on messages we receive and he said that it is not scalable and we need the knowledge base. Can someone give me any advise on which approach to use for this system? If you recommend k.b., then which one should we use? The project is written in java. Thank you.

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• Open source alternative to WebEx WebOffice?

  - by Dieseltime

  I have a client who has been using WebOffice (from WebEx) for a variety of tasks within their small organization. The problem is that they only really need a small subset of the features WebOffice provides (Contact list, Database, and Document Storage). They've asked me to develop a website focused on these three features with the rationalization that this should be more cost-effective, since they currently aren't using many of the features of WebOffice they pay for. What are some open-source alternatives that I could implement for them? Sharepoint sounds like it would be too bloated and Google Apps may not be as collaborative as they would like.

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• Namespaces combined with TFS / Source Control explanation

  - by Christian

  As an ISV company we slowly run into the "structure your code"-issue. We mainly develop using Visual Studio 2008 and 2010 RC. Languages c# and vb.net. We have our own Team Foundation Server and of course we use Source Control. When we started developing based on the .NET Framework, we also begun using Namespaces in a primitive way. With the time we 'became more mature', i mean we learned to use the namespaces and we structured the code more and more, but only in the solution scope. Now we have about 100 different projects and solutions in our Source Safe. We realized that many of our own classes are coded very redundant, i mean, a Write2Log, GetExtensionFromFilename or similar Function can be found between one and 20 times in all these projects and solutions. So my idea is: Creating one single kind of root folder in Source Control and start an own namespace-hierarchy-structure below this root, let's name it CompanyName. A Write2Log class would then be found in CompanyName.System.Logging. Whenever we create a new solution or project and we need a log function, we will 'namespace' that solution and place it accordingly somewhere below the CompanyName root folder. To have the logging functionality we then import (add) the existing project to the solution. Those 20+ projects/solutions with the write2log class can then be maintained in one single place. To my questions: - is that a good idea, the philosophy of namespaces and source control? - There must be a good book explaining the Namespaces combined with Source Control, yes? any hints/directions/tips? - how do you manage your 50+ projects?

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• rails + compass: advantages vs using haml + blueprint directly

  - by egarcia

  I've got some experience using haml (+sass) on rails projects. I recently started using them with blueprintcss - the only thing I did was transform blueprint.css into a sass file, and started coding from there. I even have a rails generator that includes all this by default. It seems that Compass does what I do, and other things. I'm trying to understand what those other things are - but the documentation/tutorials weren't very clear. These are my conclusions: Compass comes with built-in sass mixins that implement common CSS idioms, such as links with icons or horizontal lists. My solution doesn't provide anything like that. (1 point for Compass). Compass has several command-line options: you can create a rails project, but you can also "install" it on an existing rails project. A rails generator could be personalized to do the same thing, I guess. (Tie). Compass has two modes of working with blueprint: "basic" and "semantic" usage. I'm not clear about the differences between those. With my rails generator I only have one mode, but it seems enough. (Tie) Apparently, Compass is prepared to use other frameworks, besides blueprint (e.g. YUI). I could not find much documentation about this, and I'm not interested on it anyway - blueprint is ok for me (Tie). Compass' learning curve seems a bit stiff and the documentation seems sparse. Learning could be a bit difficult. On the other hand, I know the ins and outs of my own system and can use it right away. (1 point for my system). With this analysis, I'm hesitant to give Compass a try. Is my analysis correct? Are Am I missing any key points, or have I evaluated any of these points wrongly?

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• C# WPF XAML Problem with icon in GridViewColumn

  - by Alex

  I've created a ListView with a GridView component in it. Now trying to fill one of the cells with an icon (PNG) like in the code sample below (save_icon.png): <ListView.View> <GridView> <GridViewColumn Header="Date" Width="Auto" DisplayMemberBinding="{Binding Date}" /> <GridViewColumn Header="Time" Width="Auto" DisplayMemberBinding="{Binding Time}" /> <GridViewColumn Header="FriendlyName" Width="Auto" DisplayMemberBinding="{Binding FriendlyName}" /> <GridViewColumn Width="Auto"> <Image Source="save_icon.png" /> </GridViewColumn> </GridView> </ListView.View> Visual Studio gives me an error on the line, where i put the icon into the column (ERROR: "Error 35: The file save_icon.png is not part of the project or its 'Build Action' property is not set to 'Resource'.") I added the icon to the project as a resource and when i start the app, everything works (the icon appears at the right place). But the WPF designer window can't be reloaded and i'm not able to see changes in the designer, when i change the XAML code. Can somebody explain this error or am i doing something wrong? Thanks for every hint in advance!

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• Practical size limitations for RDBMS

  - by grenade

  I am working on a project that must store very large datasets and associated reference data. I have never come across a project that required tables quite this large. I have proved that at least one development environment cannot cope at the database tier with the processing required by the complex queries against views that the application layer generates (views with multiple inner and outer joins, grouping, summing and averaging against tables with 90 million rows). The RDBMS that I have tested against is DB2 on AIX. The dev environment that failed was loaded with 1/20th of the volume that will be processed in production. I am assured that the production hardware is superior to the dev and staging hardware but I just don't believe that it will cope with the sheer volume of data and complexity of queries. Before the dev environment failed, it was taking in excess of 5 minutes to return a small dataset (several hundred rows) that was produced by a complex query (many joins, lots of grouping, summing and averaging) against the large tables. My gut feeling is that the db architecture must change so that the aggregations currently provided by the views are performed as part of an off-peak batch process. Now for my question. I am assured by people who claim to have experience of this sort of thing (which I do not) that my fears are unfounded. Are they? Can a modern RDBMS (SQL Server 2008, Oracle, DB2) cope with the volume and complexity I have described (given an appropriate amount of hardware) or are we in the realm of technologies like Google's BigTable? I'm hoping for answers from folks who have actually had to work with this sort of volume at a non-theoretical level.

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• Check for modification failure in content Integration using VisualSVN Server and Cruisecontrol.net

  - by harun123

  I am using CruiseControl.net for continous integration. I've created a repository for my project using VisualSvn server (uses Windows Authentication). Both the servers are hosted in the same system (Os-Microsoft Windows Server 2003 sp2). When i force build the project using CruiseControl.net "Failed task(s): Svn: CheckForModifications" is shown as the message. When i checked the build report, it says as follows: BUILD EXCEPTION Error Message: ThoughtWorks.CruiseControl.Core.CruiseControlException: Source control operation failed: svn: OPTIONS of 'https://sp-ci.sbsnetwork.local:8443/svn/IntranetPortal/Source': **Server certificate verification failed: issuer is not trusted** (https://sp-ci.sbsnetwork.local:8443). Process command: C:\Program Files\VisualSVN Server\bin\svn.exe log **sameUrlAbove** -r "{2010-04-29T08:35:26Z}:{2010-04-29T09:04:02Z}" --verbose --xml --username ccnetadmin --password cruise --non-interactive --no-auth-cache at ThoughtWorks.CruiseControl.Core.Sourcecontrol.ProcessSourceControl.Execute(ProcessInfo processInfo) at ThoughtWorks.CruiseControl.Core.Sourcecontrol.Svn.GetModifications (IIntegrationResult from, IIntegrationResult to) at ThoughtWorks.CruiseControl.Core.Sourcecontrol.QuietPeriod.GetModifications(ISourceControl sourceControl, IIntegrationResult lastBuild, IIntegrationResult thisBuild) at ThoughtWorks.CruiseControl.Core.IntegrationRunner.GetModifications(IIntegrationResult from, IIntegrationResult to) at ThoughtWorks.CruiseControl.Core.IntegrationRunner.Integrate(IntegrationRequest request) My SourceControl node in the ccnet.config is as shown below: <sourcecontrol type="svn"> <executable>C:\Program Files\VisualSVN Server\bin\svn.exe</executable> <trunkUrl> check out url </trunkUrl> <workingDirectory> C:\ProjectWorkingDirectories\IntranetPortal\Source </workingDirectory> <username> ccnetadmin </username> <password> cruise </password> </sourcecontrol> Can any one suggest how to avoid this error?

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• How can I connect to server using SSL(secure socket layer) on .NET Compact Framework

  - by net

  Hello. I want to change .NET framework v3.5 to .NET compact framework v3.5. But I can't change SSL Stream class to compact framework version. For resolving this problem, I already read some article and msdn library. http://blogs.msdn.com/cgarcia/archive/2009/08/21/enable-ssl-for-managed-socket-on-windows-mobile.aspx http://blogs.msdn.com/cgarcia/archive/2009/08/22/getting-a-managed-socket-to-talk-ssl.aspx http://msdn.microsoft.com/en-us/library/aa916117.aspx but I got an error that is "Unkown error 0x0ffffff", when invoking 'socket.connect(endPoint)' method based on thease article. In order to find the proper method, I try to use TcpClient class. but i can't solve this problem. When I try to connect to server on .NET compact framework, TcpClient class didn't work(Smart Device project and windows ce). As you can see below, I've got the error. In other hand, this code is work on .NET framework(C# console project). I can't understand why this socket can not access to server. Thanks for reading my question.

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