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  • Unresponsive UI when using BeginInvoke

    - by Kazoom
    Bckground I have a networked application written in C#. my server program has a UI and several communication threads, that read from tcp sockets and display messages on controller UI. Communication with each client is done through a seprate thread. When i recieve some stream of messages from one client , the thread for that client writes on UI, which is a richtextbox on a Form. I call SetTextHelper(string text) method of the form. which looks like this private delegate void MyTextUpdateHandler(string text); public void SetTextHelper(string text) { BeginInvoke(new MyTextUpdateHandler(SetText), new object[] { text }); } public setText(string text) { richtext.Text= text; } Question - If i use BeginInvoke my UI is entirely unresponsive when i m writing large stream of data to UI - Invoke solves that problem, but i read that for multi threaded environment where many thereads are sharing same resource Invoke can lead to deadlocks I share the common ichtextbox between around 16 threads - What would be a good desing for my situation?

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  • Help debugging Apache, Passenger and Rails problem

    - by Matt Dressel
    We have an environment running that uses Apache, Passenger and rails. The system is handling most request normally, yet certain requests do not make it to the rails application. For instance, a request to /books is successful, but /books/1 hits apache and passenger, but does not even make it to rails. We set the apache log level to debug and the passenger log level to 3 so that we could monitor all incoming requests. We could see each request coming through and even the /books/1 request is being handled by passenger. But it never gets to rails. Is there any way to determine where the request goes between Passenger and rails or where debugging information might live? Has anyone ever seen any problems with passenger spawning or queuing? We have spawning set to conservative. Also, we have had some permission/ownership problems in the past, so I am not ruling this out yet. Thanks in advance

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  • supply inputs to python unittests

    - by zubin71
    I`m relatively new to the concept of unit-testing and have very little experience in the same. I have been looking at lots of articles on how to write unit-tests; however, I still have difficulty in writing tests where conditions like the following arise:- Test user Input. Test input read from a file. Test input read from an environment variable. Itd be great if someone could show me how to approach the above mentioned scenarios; itd still be awesome if you could point me to a few docs/articles/blog posts which I could read.

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  • Writing a simple batch file to setup a variable?

    - by Sam
    I want to write a simple batch file where i want to setup a environment variable based on the machine architecture. It is as below: set ARCH=%PROCESSOR_ARCHITECTURE% echo %ARCH% if %ARCH%==x86 ( set JAVA_ROOT=C:\Progra~1\Java\j2re1.4.2_13 ) else ( set JAVA_ROOT=C:\Progra~2\Java\j2re1.4.2_13 ) echo JAVA_ROOT is %JAVA_ROOT% On 64-bit machine where the architecture is 'AMD64' the JAVA_ROOT will be displayed as 'C:\Progra~2\Java\j2re1.4.2_13' at the echo statement. But when i run an application that uses this file, the first value of JAVA_ROOT would be picked up 'C:\Progra~1\Java\j2re1.4.2_13'. I don't have any idea why it goes in the 'if' part even though i am running this on 64-bit Windows7. When i echoed the

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  • Efficient implementation of threads in the given scenario

    - by shadeMe
    I've got a winforms application that is set up in the following manner: 2 buttons, a textbox, a collection K, function X and another function, Y. Function X parses a large database and enumerates some of its data in the global collection. Button 1 calls function X. Function Y walks through the above collection and prints out the data in the textbox. Button 2 calls function Y. I'd like to call function X through a worker thread in such a way that: The form remains responsive to user input. This comes intrinsically from the use of a separate thread. There is never more than a single instance of function X running at any point in time. K can be accessed by both functions at all times. What would be the most efficient implementation of the above environment ?

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  • Laravel 4 - Using multiple paginators on one page

    - by Fry Farnsworth
    I've been googling for this question but can't find any good answers. I found that there is a method called setPageName() for the paginator but it only works when used like Paginator::setPageName('page'). I looked up the paginator in the Laravel API (http://laravel.com/api/class-Illuminate.Pagination.Environment.html) and the method is a public function just like setBaseUrl which I am currently using like $albums->setBaseUrl('/album/'); for instance I want to have a Photo paginator (?photoPage=n) and a Comment paginator (?commentPage=n). Is there any way that I can use two paginators that use different page names in the URL on one page, or at least call the setPageName() method like setBaseUrl()?

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  • How to make SVN ignore a folder?

    - by pg
    I want to make SVN ignore everything that is in my wordpress directory. It bring me nothing but headaches because of auto updates to plugins etc. When I... svn propedit svn:ignore ./blog It tells me... svn: None of the environment variables SVN_EDITOR, VISUAL or EDITOR is set, and no 'editor-cmd' run-time configuration option was found So I... [phil@sessions www]$ export SVN_EDITOR=emacs [phil@sessions www]$ svn propedit svn:ignore ./blog But I don't know what to put in here to make it ignore.

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  • Best tools to parse reports

    - by Andy Schaefer
    I have a report that I need to parse/scrape for loading into an alternate or query-able data store. The report looks like something akin to: this. My gut is that PERL would do a decent job, but I have several different permutations of the report and I don't really want to make a script around each form. This report is a pretty stock type report, and I have seen where Monarch Pro can parse these types of reports, but I have had a difficult time finding alternatives to how these could be parsed since I'm looking to do this working primarily in a Linux environment. Any suggestions?

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  • .Net programming on a Apple computer

    - by VoodooChild
    Hello, I really would like to write an app or apps for iPhone / iPad. I've never done this so far because most of my work has been in windows environment. I recently got an i7 with windows 7 and love it, and this is what I am using to do development on currently. I would love to try out writing a simple App on a mac for either an iPhone or iPad. The question I had was are there any developers using a macbook to do windows based programming as well as writing apps? And what is their setups like? (example: using bootcamp) Most importantly, is it recommended based on the experience they had doing so? any problems / performance issue? These are the concerns I have to address before justifying spending time and money on this. Thanks, Voodoo

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  • what is the best setting for using lighttpd on 8G ram?

    - by user299415
    I have running 8GB ram and 8 x Xeon 3361 system! What is the best setting for running simultaneous connection! What is the maximum? Is setting like this correct? server.max-keep-alive-requests = 0 server.max-keep-alive-idle = 10 server.max-read-idle = 60 server.max-write-idle = 60 server.event-handler = "linux-sysepoll" server.max-fds = 2048 fastcgi.server = ( ".php" = ( "localhost" = ( "socket" = "/tmp/php-fastcgi.socket", "bin-path" = "/usr/bin/php-cgi", "max-procs" = 20, "bin-environment" = ( "PHP_FCGI_CHILDREN" = "40", "PHP_FCGI_MAX_REQUESTS" = "800" ), "broken-scriptfilename" = "enable" ) ) ) please help me!

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  • Single windows service to provide access to cached data?

    - by Matthias
    I need a solution where I have a single windows service providing access to cached data to various consumers: To an MVC web application, a .Net Assembly (COM interop) used within an classic ASP page, other windows services, a windows forms application. So the data must be accessible from various processes. The data being cached is read-only. For now, all processes are located on the same machine. The environment is .net framework 3.5 and c#. My question is, how can multiple appdomains/processes retrieve cached data from a single windows service?

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  • Add Attribute (System.Attribute variety) to .aspx page - not the code-behind

    - by Macho Matt
    I am creating a custom Attribute (extending System.Attribute). I know I can put it on another class easily enough by doing the following. [MattsAttribute] public class SomeClassWhichIsACodeBehind { However, I need to be able to test this attribute easily, and putting it in the code-behind would cause a lot of extra effort to get it deployed to an environment which would respond to the behavior of attribute. What I would like to do: declaratively apply this attribute to the .aspx page itself (which is really just another class that inherits from the code-behind). Is this possible? If so, what is the proper syntax for doing this?

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  • Finding efficient overlapped entries in a SQL table

    - by Laoneo
    What is the most efficient way to find all entries which do overlap with others in the same table? Every entry has a start and end date. For example I have the following database setup: CREATE TABLE DEMO ( DEMO_ID int IDENTITY , START date NOT NULL , END date NOT NULL }; INSERT INTO DEMO (DEMO_ID, START, END) VALUES (1, '20100201', '20100205'); INSERT INTO DEMO (DEMO_ID, START, END) VALUES (2, '20100202', '20100204'); INSERT INTO DEMO (DEMO_ID, START, END) VALUES (3, '20100204', '20100208'); INSERT INTO DEMO (DEMO_ID, START, END) VALUES (4, '20100206', '20100211'); My query looks as follow: SELECT DISTINCT * FROM DEMO A, DEMO B WHERE A.DEMO_ID != B.DEMO_ID AND A.START < B.END AND B.START < A.END The problem is when my demo table has for example 20'000 rows the query takes too long. My environment is MS SQL Server 2008. Thanks for any more efficient solution

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  • a question about flex preloaders

    - by dubbeat
    Hi, I'm moving to a pure as3 environment into flex and I have a question about preloaders. For one of my apps in particular when the swf loaded I would add a screen with an animated preloader. Then at a particular point in my code when I know all of my xml has been parsed, UI built and all initiliztion done I dispatch a "done" event which removes the preloader. How can I achieve this is flex? I've only ever really seen flex preloaders that are percentage based which I believe represent the actual loading of the swf itself?

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  • Couchbase (ex. membase) solution to dump all keys in a bucket

    - by j99
    I was googling around and found various python + tap solutions that should enable me to dump all keys from a bucket but none of them worked for me. I have a bucket at port 11230 and I need to get a dump of all keys in order to fill them into sphinx search engine. If I execute: # python /opt/couchbase/lib/python/tap_example.py 127.0.0.1:11230 I get the following output: info: New bin connection from None error: uncaptured python exception, closing channel <tap.TapConnection connected at 0x7f5d287184d0> (<type 'exceptions.AssertionError'>: [/usr/lib/python2.6/asyncore.py|read|78] [/usr/lib/python2.6/asyncore.py|handle_read_event|428] [/opt/couchbase/lib/python/mc_bin_server.py|handle_read|325]) this error is the same even if I try some other host or port. I also tried many other python scripts that I found on forums and groups but all of them produced the same error. My primary development environment includes PHP & Perl on Debian linux box but I will take any solution that would just dump all the keys into plain text file. Thank you for any help!

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  • Script.PostDeployment.sql not executing in CI build VS 2010

    - by Suirtimed
    I have a database project in VS 2010 (SQL 2008). The local Deploy Solution action works and executes all of the SQL in the Script.PostDeployment.sql file. When I check changes in, the Build Definition for the continuous integration server executes. The database is deployed into the CI environment, but the PostDeployment script doesn't get executed. I wasn't able to find anything specific to this particular scenario. I also expect I'll need to provide additional information unless this is a trivial problem that I missed somewhere. Additional Information: The build is executing vsdbcmd.exe to deploy. The deployment manifest references the PostDeployment.sql file and it's present in the path with the rest of the files. Here is a reference to a thread on social.msdn.microsoft.com regarding this problem.

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  • Why does derivative trading position always require C++ knowledge?

    - by Jeffrey
    I’ve never worked in trading environment before and I was curious to see that few of the trading houses seem to use C# but most of them do heavily rely on C++. Why is it? Is it because C++ is better performance wise? Is it because of legacy code base? Is it because cross platform issue? What about dynamic languages (ruby, python)? Are they too slow for this kind of work in terms of performance? Updated: If realibility and performance are important would "Erlang" be the "next big thing" in trading platform?

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  • How do I save a file generated by an OS X Dashboard Widget?

    - by Weston C
    I've got a web app that I'm porting to an OS X Dashboard widget. The web app generates some data on the client side using JavaScript, and then, when the user wants to save it, sends it to a server-side script which relays the data back with the Content-disposition: attachment; HTTP header, triggering a save-file dialog in most browsers. I've tried duplicating this in the Dashboard environment. The Widget simply disappears. I don't know, but I suspect that it may be actually navigating to the unfamiliar content. So, how do I trigger a "save file dialog" -- or, failing that, use any method at all to save the data the Widget generates as a file?

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  • How do you do masked password entry on windows using character overwriting?

    - by Erick
    Currently I am using this implementation to hide user input during password entry: void setEcho(bool enable) { HANDLE hStdin = GetStdHandle(STD_INPUT_HANDLE); DWORD mode; GetConsoleMode(hStdin, &mode); if(enable) { mode |= ENABLE_ECHO_INPUT; } else { mode &= ~ENABLE_ECHO_INPUT; } SetConsoleMode(hStdin, mode); } The user needs to be able to have positive feed back that text entry is being made. What techniques are available in a Win32 environment using C++?

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  • Why does my Eclipse crash all the time?

    - by Marcel
    Somehow stupid question, I have to admit - hope it won't cost me too many points. To make it clear: I would also be happy if you can help me find the reason for the crashes. I wouldn't expect a precise answer. However, I don't see why my Eclipse is crashing (freezing) all the time. Mostly when I save a file. For some reason, crashes seem to increase lately... I use Eclipse Helios (Version: 3.6.1) and java version "1.6.0_20" (OpenJDK Runtime Environment (IcedTea6 1.9.2) (6b20-1.9.2-0ubuntu2) OpenJDK 64-Bit Server VM (build 19.0-b09, mixed mode)) on Ubuntu 10.10 (64-Bit). Thank you!

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  • Unzip a folder which is programatically downloaded in Silverlight

    - by subbu
    Hi all, My requirement is this. I am programmatically downloading a folder from a remote server in zipped format using WebClient. This part is done. My folder will have only DLLs and EXEs. Can any one suggest an unzipping algorithim or libraries which can be used for unzipping? http://www.sharpgis.net/post/2009/04/21/REALLY-small-unzip-utility-for-Silverlight.aspx I tried out the method suggested in the above link. But my DLLs and EXEs are getting corrupted. Can any one help me out in this? My programming environment is VS2010 and Silverlight 4.0. Application is OOB and has Elevated Priv

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  • Is there a reasonable way to attach new path to PATH in bashrc?

    - by Ripley
    Guys I constantly need to attach new paths to the PATH environment variable in .bashrc, like below: export PATH=/usr/local/bin:$PATH Then to make it take effect, I always do 'source ~/.bashrc' or '. ~/.bashrc', while I found one shortcoming of doing so which make me uncomfortable. If I keep doing so, the PATH will getting longer and longer with many duplicated entries, for example in the previous command, if I source it twice, the value of PATH will be PATH=/usr/local/bin:/usr/local/bin:/usr/local/bin:$PATH(<-the original path). Is there a more decent way to attach new path to PATH in bashrc without making it ugly?

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  • JavaScript helper libraries? No DOM or AJAX stuff

    - by Melmacian
    As I'm writing JavaScript I'm always missing some fairly basic language features that JavaScript just don't have. So is there any library that would bring such features as trim, sprintf, str.endwith and etc. functions to JavaScript ? I just have written those functions too many times and I'm also tired of copy/pasting them from my old code. It would be nice to have some library which has those implemented and tested in one place. Note that I'm not talking about Ajax/DOM-libraries like jQuery or Dojo and such. I know that those libraries bring some of the features that I'm talking here, but not all. And I would like to have also an environment independent library so that same library could be used with server side JavaScript . Best library so far that I've found is php.js, but I don't like how it is polluting the global namespace. I'm also not too fond of how PHP-functions are named.

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  • BDD-testing using a UI driver (e.g. Selenium for a web-application)

    - by jonathanconway
    Can BDD (Behavior Driven Design) tests be implemented using a UI driver? For example, given a web application, instead of: Writing tests for the back-end, and then more tests in Javascript for the front-end Should I: Write the tests as Selenium macros, which simulate mouse-clicks, etc in the actual browser? The advantages I see in doing it this way are: The tests are written in one language, rather than several They're focussed on the UI, which gets developers thinking outside-in They run in the real execution environment (the browser), which allows us to Test different browsers Test different servers Get insight into real-world performance Thoughts?

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  • Is there a variable I could use to identify the project directory at the command line options in the

    - by J. Pablo Fernández
    In Visual Studio 2008 when you go to properties of a project (an ASP.NET MVC one at least) you have the option to run an external program. There are three parts for it: the path to the program, the command line options, the working directory. I need to pass the root of my web application as a command line argument. I don't want to hardcode the path in my machine in that directory. Is there some sort of (environment) variable I could use? Background: I'm trying to run UltiDev Cassini because VS' Cassini is 32bit only. I think this is the right way to run it, is it?

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