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• chat application: pubsubhubbub vs xmpp

  - by sofia

  I'm unsure on the best stack to build a chat application. Currently I'm thinking of two main options: facebook tornado cons: does not use the main chat protocol xmpp but pubsubhubbub pros: i really like its simplicity for development (webserver + webframework); pubsubhubbub also seems simpler as a protocol than xmpp; and i know python xmpp + bosch, punjab, ejabberd cons: don't know erlang; overall seems a bit harder to develop pros: uses xmpp protocol The chat app will need to have the following: Private messages Public rooms Private rooms Chat history for rooms (not forever, just the last n messages) html embedding url to chat room Both options seem scalable so that's not really my worry (we're thinking of running the app in amazon's ec2 as well). I know there's a project that builds a xmpp server using tornado but it's not ready for production use and our deadline isn't that big. Basically my main worry is ease of development vs somehow regretting later using pubsubhubbub to develop a chat app but I read somewhere that PubSubHubbub might eventually replace XMPP as REST replaced SOAP - so what do you think?

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• How to get the Ansinerator library to work?

  - by konzepz

  I'm trying to get the Ansinerator library to work my on my localhost, but something's amiss. I'm receiving the following errors: Notice: Undefined index: hash in ansi.php on line 23 Notice: Undefined index: aml in ansi.php on line 37 Notice: Undefined variable: PNG_DESTRUCT in ansi.php on line 119 Notice: Undefined offset: -1 in ansi.php on line 362 Notice: Trying to get property of non-object in ansi.php on line 362 Notice: Undefined variable: links in ansi.php on line 459 Notice: Trying to get property of non-object in ansi.php on line 677 Notice: Undefined variable: links in ansi.php on line 459 Notice: Undefined variable: map_link in ansi.php on line 687 Any idea where am I going wrong with this one? I've installed the php-gd library, restarted the server, and while runs perfectly on production server, localhost will refuse. Ideas? Thank you.

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• How do I put a custom version of node/add form in a view using customfield in drupal 6?

  - by niedakh

  Hi, I'm trying to add a pre-filled 'add reply' form to a view of nodes. Reply is a content-type (reply) with certain fields that need to be prefilled based on what is in the view. This way a user can see only the selected fields from the node/add/reply. At the moment I'm building the forms manually - copy the form from node/add, do some modifications using php & views customfield, but I would like to be able to just push default values to some fields and hide some others and then make drupal render it with all the javascript glory like date select etc. Can this be done?

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• Convert Microsoft Visio Drawing (vsd) to PDF automatically

  - by nhinkle

  An open-source project I am working on uses Visio drawings for documentation, which are checked into source control. For those working on the project who don't own Visio, we have been converting the vsd files to PDFs so that they can still view them. It's not too difficult to save a copy as a PDF when making changes to the documentation, but we would like an automated way to do this conversion, so that we can set it up as a pre-checkin script in the SVN client. If anybody knows of a way to do this, either using something built-in to Visio, or with an outside script or command line tool, we would appreciate it. Edit: Thanks to the suggestion below, I have found the Visio Viewer 2010. This will be helpful for our contributors using Windows. We would still like to have the ability to create PDFs though, as there are readers available on every major operating system, and our contributors will not be using only Windows.

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• Hierarchy based aggregation

  - by Ganapathy Subramaniam

  I have a hierarchy table in SQL Server 2005 which contains employees - managers - department - location - state. Sample table for hierarchy table: ID Name ParentID Type 1 PA NULL 0 (group) 2 Pittsburgh 1 1 (subgroup) 3 Accounts 2 1 4 Alex 3 2 (employee) 5 Robin 3 2 6 HR 2 1 7 Robert 6 2 Second one is fact table which contains employee salary details ID and Salary. Sample data for fact table: ID Salary 4 6000 5 5000 7 4000 Is there any good to way to display the hierarchy from hierarchy table with aggregated sum of salary based on employees. Expected result is like Name Salary PA 15000 (Pittsburgh + others(if any)) Pittusburgh 15000 (Accounts + HR) Accounts 11000 (Alex + Robin) Alex 6000 (direct values) Robin 5000 HR 4000 Robert 4000 In my production environment, hierarchy table may contain 23000+ rows and fact table may contain 300,000+ rows. So, I thought of providing any level of groupid to the query to retrieve just its children and its corresponding aggregated value. Any better solution?

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• Automated testing with Ruby on Rails - best practices

  - by randombits

  Curious, what are you folks doing in as far as automating your unit tests with ruby on rails? Do you create a script that run a rake job in cron and have it mail you results? a pre-commit hook in git? just manual invokation? I understand tests completely, but wondering what are best practices to catch errors before they happen. Let's take for granted that the tests themselves are flawless and work as they should. What's the next step to make sure they reach you with the potentially detrimental results at the right time?

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• Move asp.net website to subfolder/subdomain

  - by brz dot net

  What is the effective way to deploy an asp.net website in subfolder/subdomain? Actually I need to keep web.config in root directory and modify following things for this. Web.config Location tags Web.config authentication forms tag Web.sitemap Style.css Response.redirect/Server.transfer Image path Is there any way to avoid these changes? So my development work is not more different from production. Means I am expecting one place where applied changes are effective on whole site. No need to modify path on each page.

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• Visual Studio 2008 - App_webreferences and dynamic urls

  - by Patrick Hempton

  When you add a web service reference in VS 2008 Web site project, you get a new folder in App_webreferences. This contains a disco,wsdl and discomap file. Additionally, you get a key/value pair in the web.config which contains the endpoint URL. Within the disco,wsdl and discomap files, the URL is strewn about leaving many places to change the url as we move from dev/test/stage/production. Why is it that when I change the URL in the web.config and perform an update on the web reference, the old URL remains in all three of those files? Why does it not get updated? Has anyone figured out how to manage this? Any insight is appreciated.

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• How to include asp.net assets when using Team Build 2008

  - by bonskijr

  I am able to configure our Build Server (Team Build 2008) to build our asp.net application. I've done so via <ConfigurationToBuild Include="Debug|Mixed Platforms"> <FlavorToBuild>Debug</FlavorToBuild> <PlatformToBuild>Mixed Platforms</PlatformToBuild> </ConfigurationToBuild> Problem though, the asp.net assets(eg. script folders, imgs, etc.) are not copied to the deployment folder. Folder(_PublishedWebsites) only contains the binaries references of the app plus the pre-compiled web services. Is there a way to include said folders/files to the deployment folder? Thanks

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• Django-pyodbc SQL Server/freetds server connection problems on linux

  - by wizard

  Error: ('IM002', '[IM002] [unixODBC][Driver Manager]Data source name not found, and no default driver specified (0) (SQLDriverConnectW)') I'm migrating from developing on a windows development machine to Linux machine in production and I'm having issues with the freetds driver. As far as I can tell that error message means it can't find the driver. I can connect via the cli via sqsh and tsql. I've setup my settings.py as such. 'bc2db': { 'ENGINE': 'sql_server.pyodbc', 'NAME': 'DataTEST', 'USER': 'appuser', 'PASSWORD': 'PASS', 'HOST': 'bc2.domain.com', 'options': { 'driver': 'FreeTDS', } }, Does anyone have any SQL Server experience with django? do I have to use a dns? (how would I format that?)

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• Heap Dump Root Classes

  - by Adnan Memon

  We have production system going into infinite loop of full gc and memory drops form 8 gigs to like 1 MB in just 2 minutes. After taking heap dump it tells me there an is an array of java.lang.Object ([Ljava.lang.Object) with millions of java.lang.String objects having same String taking 99% of heap. But it doesn't tell me which class is referencing to this array so that I can fix it in the code. I took the heap dump using jmap tool on JDK 6 and used JProfiler, NetBeans, SAP Memory Analyzer and IBM Memory Analyzer but none of those tell me what is causing this huge array of objects?? ... like what class is referencing to it or contains it. Do I have to take a different dump with different config in order to get that info? ... Or anything else that can help me find out the culprit class causing this ... it will help a lot.

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• NHibernate 2.1.2 in medium trust.

  - by John

  I'm trying to configure nhibernate 2.1.2 to run in medium trust, without any luck. I have tried follwing the suggestions to run in medium trust and pre-generating the proxies. I then tried to remove all references to lazy loading setting the default-lazy="false" on all classes and bags. However this threw an exception asking me to configure the proxyfactory.factory_class None of these methds worked as they kept throwing generic security exceptions or throwing easying that libraries do not allow AllowPartiallyTrustedCallers. Am I using the wrong version of NHibernate if I want to run in medium trust? Is there a specific set of binaries, or source, which I should be using.

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• Examples of when to use PageAsyncTask (Asynchronous asp.net pages)

  - by Tony_Henrich

  From my understanding from reading about ASP.NET asynchronous pages, the method which executes when the asynchronous task begins ALWAYS EXECUTES between the prerender and the pre-render Complete events. So because the page's controls' events run between the page's load and prerender events, is it true that whatever the begin task handler (handler for BeginAsync below) produces, it can't be used in the controls' events? So for example, if the handler gets data from a database, the data can't be used in any of the controls' postback events? Would you bind data to a data control after prerender? PageAsyncTask pat = new PageAsyncTask(BeginAsync, EndAsync, null, null, true); this.RegisterAsyncTask(pat);

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• Change present working directory of a calling shell from a ruby script

  - by Erik Kastman

  I'm writing a simple ruby sandbox command-line utility to copy and unzip directories from a remote filesystem to a local scratch directory in order to unzip them and let users edit the files. I'm using Dir.mktmpdir as the default scratch directory, which gives a really ugly path (for example: /var/folders/zz/zzzivhrRnAmviuee+++1vE+++yo/-Tmp-/d20100311-70034-abz5zj) I'd like the last action of the copy-and-unzip script to cd the calling shell into the new scratch directory so people can access it easily, but I can't figure out how to change the PWD of the calling shell. One possibility is to have the utility print out the new path to stdout and then run the script as part of a subshell (i.e. cd $(sandbox my_dir) ), but I want to print out progress on the copy-and-unzipping since it can take up to 10 minutes, so this won't work. Should I just have it go to a pre-determined, easy-to-find scratch directory? Does anyone have a better suggestion? Thanks in advance for your help. -Erik

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• How do you include additional files using VS2010 web deployment packages?

  - by Jason

  I am testing out using the new web packaging functionality in visual studio 2010 and came across a situation where I use a pre-build event to copy required .dll's into my bin folder that my app relies on for API calls. They cannot be included as a reference since they are not COM dlls that can be used with interop. When I build my deployment package those files are excluded when I choose the option to only include the files required to run the app. Is there a way to configure the deployment settings to include these files? I have had no luck finding any good documentation on this.

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• Thrift and .NET - Is this is right combination?

  - by Vadi

  I've been evaluating various technologies for a Social Networking project. The Thrift kind of interested me to evaluate. The advantage I see using Thrift is I can even come with C++ services when the computation in any such business is huge and may not fits with .NET etc., Please suggest your comments. My Questions: Is the open-sourced one is production-ready? Is it the right stack for services layer to choose when the application (GUI) is primarily gets developed in ASP.NET and DB is SQL Server? Is there any other caveats

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• PHPExcel set specific headers for file format

  - by Asif

  Hi, While googling I found two different sets of headers that need to be set when outputting excel generated in different file format. for e.g. For Type "Excel5" headers are: header("Pragma: public"); header("Expires: 0"); header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); header("Content-Type: application/force-download"); header("Content-Type: application/octet-stream"); header("Content-Type: application/download");; header("Content-Disposition: attachment;filename=$filename"); header("Content-Transfer-Encoding: binary "); For Type "Excel2007" headers are: header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'); header('Content-Disposition: attachment;filename="myfile.xlsx"'); header('Cache-Control: max-age=0'); My question: is there need to set up different headers for each file type as there are other file types also CSV, HTML and PDF?

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• How to set target hosts in Fabric file

  - by ssc

  I want to use Fabric to deploy my web app code to development, staging and production servers. My fabfile: def deploy_2_dev(): deploy('dev') def deploy_2_staging(): deploy('staging') def deploy_2_prod(): deploy('prod') def deploy(server): print 'env.hosts:', env.hosts env.hosts = [server] print 'env.hosts:', env.hosts Sample output: host:folder user$ fab deploy_2_dev env.hosts: [] env.hosts: ['dev'] No hosts found. Please specify (single) host string for connection: When I create a set_hosts() task as shown in the Fabric docs, env.hosts is set properly. However, this is not a viable option, neither is a decorator. Passing hosts on the command line would ultimately result in some kind of shell script that calls the fabfile, I would prefer having one single tool do the job properly. It says in the Fabric docs that 'env.hosts is simply a Python list object'. From my observations, this is simply not true. Can anyone explain what is going on here ? How can I set the host to deploy to ?

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• Best tools to monitor Tomcat

  - by Pier Luigi

  Hi all, I'm searching free tools for monitor tomcat (traffic, memory usage, threads, requests, CPU, logs,...). I'm currently using lambdaprobe on Tomcat 5.5.x, but it seems that is no more developed (or not? the site lambdaprobe.org is always down for me...). Has someone good experiences to share? In lambdaprobe there are some info available only if tomcat is instrumented with JMX. Well, JMX is something of strange and mysterious for me. Is a good solution in a production server? It's worth to spend my (little) time to learn it?

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• Django URL resolving infrastructure stops working

  - by btol45

  We recently launched a new Django-powered website, and we are experiencing the oddest bug: The site is running under Apache with mod_fastcgi. Everything works fine for a while, and then the URL tag and reverse() functionality stops working. Instead of returning the expected URL, they return "". We haven't noticed anything in Apache's log file; there are no errors being generated by Django. And (the kicker) the problem only occurs in production mode; we can't reproduce it when DEBUG=True. Any thoughts on where we should be looking for the problem?

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• Should we use Visual Studio 2010 for all SQL Server Database Development?

  - by Luke

  Our company currently has seven dedicated SQL Server 2008 servers each running an average of 10 databases. All databases have many stored procedures and UDFs that commonly reference other databases both on the same server and also across linked servers. We currently use SSMS for all database related administration and development but we have recently purchased Visual Studio 2010 primarily for ongoing C# WinForms and ASP.NET development. I have used VS2010 to perform schema comparisons when rolling out changes from a development server into production and I'm finding it great for this task. We would like to consider using VS2010 for all database development going forward but as far as I understand, we would have to set up ALL databases as projects because of the dependencies on linked servers etc. My question is, do you have any experience using VS2010 for database development in a similar environment? Is it easy to use in tandem with SSMS or is it a one way street once VS2010 projects have been set up for all databases? Can you make any recommendations/impart any experience with a similar scenario? Thanks, Luke

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• GAE, Python 2.5, Python 2.6 Side-by-side on windows

  - by Software Enthusiastic

  Hi On my development system, I have python 2.6, python 1.1 and GAE. I have three projects running on python 2.6 and django 1.1. And 1 project using GAE, Python 2.6 and django 1.1. I have heard that, my set-up for running GAE using python 2.6 may create some head scratching problems while deploying it on the production server, because GAE supports only python 2.5. And using 2.6 is not recommended. Can I develop GAE application using python 2.6? If not what should be the solution, I am using Window vista as my development system.

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• com.sun.management.OperatingSystemMXBean use in an OSGi bundle

  - by Paul Whelan

  I have some legacy code that was used to monitor my applications cpu,memory etc that I want to convert to a bundle. Now when i start this bundle its complaining Missing Constraint: Import-Package: com.sun.management; version="0.0.0" I had used the OperatingSystemMXBean to get access to stats on the JVM. My question is can I use this class inside an OSGI container and if so how? Or should I use some other way to monitor my application. I was making an RMI call to the application from a web frontend to get the nodes performance figures pre OSGi.

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• tptp/profiling of web-application within eclipse - no data collectors available

  - by AJ

  Hi, I have a problem with tptp/profiling within eclipse. Because at first I had some very strange problems, I downloaded the “TPTP all-in-one package” (tptp.runtime.allInOne.win32.win32.x86-TPTP-4.6.2.zip) and added the stuff I need (Jboss-Tools, etc.) I am using Windows XP SP3, Java 6u20, Eclipse 3.5.2.(, jboss-4.2.3.GA-jdk6) In "Profile Configurations"/Tab "Monitor" I got “IWAT0435E An error occurred when connecting to the host” and in the “Profile on Server” Window in the tab Monitor I got only “pre-JRE 1.5“ as choice. After disabling an enabling the IAC in “Preferences”/”Agent Controller” that IWAT...-problem was gone but now I don't get anything in the “Profile on Server”/”Monitor” tab, but it says “[Monitor] The launch requires at least one data collector to be selected.” any ideas?

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• ZFDataGrid table width

  - by emeraldjava

  I'm using zfdatagrid to display a table within a Zend app. How do i fix the width of the table? I can't find any setting in the grid.ini. public function displaytemptableAction() { $config = new Zend_Config_Ini(APPLICATION_PATH.'/grids/grid.ini', 'production'); $db = Zend_Registry::get("db"); $grid = Bvb_Grid::factory('Table',$config,$id=''); $grid->setSource(new Bvb_Grid_Source_Zend_Table(new Model_DbTable_TmpTeamRaceResult())); //CRUD Configuration $form = new Bvb_Grid_Form(); $form->setAdd(false)->setEdit(true)->setDelete(true); $grid->setForm($form); $grid->setPagination(0); $grid->setExport(array('xml','pdf')); $this->view->grid = $grid->deploy(); }

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