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  • Can I require a large donation ($499) in order for a company to receive an extended version of my open source project? [closed]

    - by Damian
    I want to make my project open source but some of its more advanced features are targeted to companies so I would like to require a donation before I send the source code to the donating company. It will be something like that: "If you want to use the extended features of XXXXXXX, please make a donation of $499 and you will receive the source code and the jar with the extended features. You will also receive personalized support by email." Is it legal and acceptable to do something like that? Can the companies donate an amount like that to an open source project? I mean, is it easy for them in terms of their accounting, tax, etc. to donate $499 dollars to an open source project. I know it is not a matter whether they will have money or not but more of a paying procedure matter.

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  • How successful is GPL in reaching its goals?

    - by StasM
    There are, broadly, two types of FOSS licenses when it relates to commercial usage of the code - let's say the GPL-type and the BSD-type. The first is, broadly, restrictive about commercial usage (by usage I also mean modification and redistribution, as well as creating derived works, etc.) of the code under the license, and the second is much more permissive. As I understand, the idea behind GPL-type licenses is to encourage people to abandon the proprietary software model and instead convert to the FOSS code, and the license is the instrument to entice them to do so - i.e. "you can use this nice software, but only if you agree to come to our camp and play by our rules". What I want to ask is - was this strategy successful so far? I.e. are there any major achievements in the form of some big project going from closed to open because of GPL or some software being developed in the open only because GPL made it so? How big is the impact of this strategy - compared, say, to the world where everybody would have BSD-type licenses or release all open-source code under public domain? Note that I am not asking if FOSS model is successful - this is beyond question. What I am asking is if the specific way of enticing people to convert from proprietary to FOSS used by GPL-type and not used by BSD-type licenses was successful. I also don't ask about the merits of GPL itself as the license - just about the fact of its effectiveness.

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  • Automatically delete files after they expire

    - by Auxiliary
    I've got this idea for some time and I was wondering if anyone has seen such a feature/app in any operating system and if you haven't, what do you think about it. Where do you think I should begin? The idea is simple. I think we all have those files that are made and probably used for a few days and then are left on our disk and we never delete them or even check to see if we need them again. It'd be cool if you could right click on a file and click on "Expire in.. 3 days" for example. And the file gets deleted after 3 days. I have a great need for this and maybe some people will find it useful. I was thinking of writing a script and use the Nautilus Action project in GNOME for a start.

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  • Computer keeps locking me out

    - by me32
    When I'm away from my computer (Windows XP) for more than ~30 minutes, I get locked out, and have to press Ctrl+Alt+Delete to login. I've checked the screensaver settings, and it's not set to lock the screen. Does anyone know what else could be causing this? Thanks

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  • How to achieve syncronization in loadbalanced multiserver environment

    - by Anoop
    Hi, I have to create a .net web application which would run on more than one front end server which are load balanced. Now I have to use some third party api which is not thread safe so only one thread should call the API at a time so I have to some use syncronization machanism like lock or mutex which provide syncronisation within the process and across the process in machine.Now will lock or mutex work in loadbalanced multiserver environment correctly? If not then is there any mechanism using which I can syncronise all the threads in all the machines??

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  • [C#] Lock a file and avoid readings while it's writing

    - by vtortola
    Hi, My web application returns a file from the filesystem. These files are dynamic, so I have no way to know the names o how many of them will there be. When this file doesn't exist, the application creates it from the database. I want to avoid that two different threads recreate the same file at the same time, or that a thread try to return the file while other thread is creating it. So I want to lock a file till its recreation is complete, if other thread try to access it ... it will have to wait the file be unlocked. I've been reading about FileStream.Lock, but I have to know the file length and it won't prevent that other thread try to read the file, so it doesn't work for my particular case. I've been reading also about FileAccess.None, but it will throw an exception (which exception type?) if other thread/process try to access the file... so I should develop a "try again while is faulting" ... and I don't like too much that approach, although maybe there is not a better way. How could I archieve this? Kind regards.

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  • How to Lock a file and avoid readings while it's writing

    - by vtortola
    My web application returns a file from the filesystem. These files are dynamic, so I have no way to know the names o how many of them will there be. When this file doesn't exist, the application creates it from the database. I want to avoid that two different threads recreate the same file at the same time, or that a thread try to return the file while other thread is creating it. So I want to lock a file till its recreation is complete, if other thread try to access it ... it will have to wait the file be unlocked. I've been reading about FileStream.Lock, but I have to know the file length and it won't prevent that other thread try to read the file, so it doesn't work for my particular case. I've been reading also about FileAccess.None, but it will throw an exception (which exception type?) if other thread/process try to access the file... so I should develop a "try again while is faulting" ... and I don't like too much that approach, although maybe there is not a better way.

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  • Lucene.net create+lock errors in ASP.NET

    - by acidzombie24
    I have an issue with Lucene.net. It throws a lock exception. After poking around i notice these things. My code below works in an app bit when calling in Application_Start i get a NoSuchDirectoryException. Not closing the writer (as my code doesnt do below) i WILL get a LockObtainFailedException with the message Lock obtain timed out: SimpleFSLock@<FULL_PATH> from either app or asp.net These thread hinted when spawning threads they get less permissions then i do (but! my main thread has problems as well...) and one solution is to impersonate IIS. I am using visual studios 2010. I am not sure how full blown it is but my attempt to impersonate it failed. So my question is how do i have lucene create the directory and not throw an exception if dont close the writer for some reason (such as power going out)? http://stackoverflow.com/questions/2341163/why-is-my-lucene-index-getting-locked/2499285#2499285 http://stackoverflow.com/questions/1123517/lucene-net-and-i-o-threading-issue/1123981#1123981 static IndexWriter writer = null; static void lucene_init() { bool create = false; string dirname = "LuceneIndex_z"; if (System.IO.Directory.Exists(dirname) == false) create = true; var directory = FSDirectory.GetDirectory(dirname); var analyzer = new StandardAnalyzer(); writer = new IndexWriter(directory, analyzer, create); }

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  • Lucene.net create+lock errors in ASP.NET

    - by acidzombie24
    I have an issue with Lucene.net. It throws a lock exception. After poking around i notice these things. My code below works in an app bit when calling in Application_Start i get a NoSuchDirectoryException. Not closing the writer (as my code doesnt do below) i WILL get a LockObtainFailedException with the message Lock obtain timed out: SimpleFSLock@<FULL_PATH> from either app or asp.net These thread hinted when spawning threads they get less permissions then i do (but! my main thread has problems as well...) and one solution is to impersonate IIS. I am using visual studios 2010. I am not sure how full blown it is but my attempt to impersonate it failed. So my question is how do i have lucene create the directory and not throw an exception if dont close the writer for some reason (such as power going out)? http://stackoverflow.com/questions/2341163/why-is-my-lucene-index-getting-locked/2499285#2499285 http://stackoverflow.com/questions/1123517/lucene-net-and-i-o-threading-issue/1123981#1123981 static IndexWriter writer = null; static void lucene_init() { bool create = false; //I now use a full path. I still get NoSuchDirectoryException //string dirname = "LuceneIndex_z"; if (System.IO.Directory.Exists(dirname) == false) create = true; var directory = FSDirectory.GetDirectory(dirname); var analyzer = new StandardAnalyzer(); writer = new IndexWriter(directory, analyzer, create); }

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  • OpenGL Calls Lock/Freeze

    - by Necrolis
    I am using some dell workstations(running WinXP Pro SP 2 & DeepFreeze) for development, but something was recenlty loaded onto these machines that prevents any opengl call(the call locks) from completing(and I know the code works as I have tested it on 'clean' machines, I also tested with simple opengl apps generated by dev-cpp, which will also lock on the dell machines). I have tried to debug my own apps to see where exactly the gl calls freeze, but there is some global system hook on ZwQueryInformationProcess that messes up calls to ZwQueryInformationThread(used by ExitThread), preventing me from debugging at all(it causes the debugger, OllyDBG, to go into an access violation reporting loop or the program to crash if the exception is passed along). the hook: ntdll.ZwQueryInformationProcess 7C90D7E0 B8 9A000000 MOV EAX,9A 7C90D7E5 BA 0003FE7F MOV EDX,7FFE0300 7C90D7EA FF12 CALL DWORD PTR DS:[EDX] 7C90D7EC - E9 0F28448D JMP 09D50000 7C90D7F1 9B WAIT 7C90D7F2 0000 ADD BYTE PTR DS:[EAX],AL 7C90D7F4 00BA 0003FE7F ADD BYTE PTR DS:[EDX+7FFE0300],BH 7C90D7FA FF12 CALL DWORD PTR DS:[EDX] 7C90D7FC C2 1400 RETN 14 7C90D7FF 90 NOP ntdll.ZwQueryInformationToken 7C90D800 B8 9C000000 MOV EAX,9C the messed up function + call: ntdll.ZwQueryInformationThread 7C90D7F0 8D9B 000000BA LEA EBX,DWORD PTR DS:[EBX+BA000000] 7C90D7F6 0003 ADD BYTE PTR DS:[EBX],AL 7C90D7F8 FE ??? ; Unknown command 7C90D7F9 7F FF JG SHORT ntdll.7C90D7FA 7C90D7FB 12C2 ADC AL,DL 7C90D7FD 14 00 ADC AL,0 7C90D7FF 90 NOP ntdll.ZwQueryInformationToken 7C90D800 B8 9C000000 MOV EAX,9C So firstly, anyone know what if anything would lead to OpenGL calls cause an infinite lock,and if there are any ways around it? and what would be creating such a hook in kernal memory ? Update: After some more fiddling, I have discovered a few more kernal hooks, a lot of them are used to nullify data returned by system information calls(such as the remote debugging port), I also managed to find out the what ever is doing this is using madchook.dll(by madshi) to do this, this dll is also injected into every running process(these seem to be some anti debugging code). Also, on the OpenGL side, it seems Direct X is fine/unaffected(I ran one of the DX 9 demo's without problems), so could one of these kernal hooks somehow affect OpenGL?

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  • Using SQL dB column as a lock for concurrent operations in Entity Framework

    - by Sid
    We have a long running user operation that is handled by a pool of worker processes. Data input and output is from Azure SQL. The master Azure SQL table structure columns are approximated to [UserId, col1, col2, ... , col N, beingProcessed, lastTimeProcessed ] beingProcessed is boolean and lastTimeProcessed is DateTime. The logic in every worker role is: public void WorkerRoleMain() { while(true) { try { dbContext db = new dbContext(); // Read foreach (UserProfile user in db.UserProfile .Where(u => DateTime.UtcNow.Subtract(u.lastTimeProcessed) > TimeSpan.FromHours(24) & u.beingProcessed == false)) { user.beingProcessed = true; // Modify db.SaveChanges(); // Write // Do some long drawn processing here ... ... ... user.lastTimeProcessed = DateTime.UtcNow; user.beingProcessed = false; db.SaveChanges(); } } catch(Exception ex) { LogException(ex); Sleep(TimeSpan.FromMinutes(5)); } } // while () } With multiple workers processing as above (each with their own Entity Framework layer), in essence beingProcessed is being used a lock for MutEx purposes Question: How can I deal with concurrency issues on the beingProcessed "lock" itself based on the above load? I think read-modify-write operation on the beingProcessed needs to be atomic but I'm open to other strategies. Open to other code refinements too.

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  • JDBC transaction dead-lock solution required?

    - by user49767
    It's a scenario described my friend and challenged to find solution. He is using Oracle database and JDBC connection with read committed as transaction isolation level. In one of the transaction, he updates a record and executes selects statement and commits the transaction. when everything happening within single thread, things are fine. But when multiple requests are handled, dead-lock happens. Thread-A updates a record. Thread B updates another record. Thread-A issues select statement and waits for Thread-B's transaction to complete the commit operation. Thread-B issues select statement and waits for Thread-A's transaction to complete the commit operation. Now above causes dead-lock. Since they use command pattern, the base framework allows to issue commit only once (at the end of all the db operation), so they are unable to issue commit immediately after select statement. My argument was Thread-A supposed to select all the records which are committed and hence should not be issue. But he said that Thread-A will surely wait till Thread-B commits the record. is that true? What are all the ways, to avoid the above issue? is it possible to change isolation-level? (without changing underlying java framework) Little information about base framework, it is something similar to Struts action, their each and every request handled by one action, transaction begins before execution and commits after execution.

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  • MFC/CCriticalSection: Simple lock situation hangs

    - by raph.amiard
    I have to program a simple threaded program with MFC/C++ for a uni assignment. I have a simple scenario in wich i have a worked thread which executes a function along the lines of : UINT createSchedules(LPVOID param) { genProgThreadVal* v = (genProgThreadVal*) param; // v->searcherLock is of type CcriticalSection* while(1) { if(v->searcherLock->Lock()) { //do the stuff, access shared object , exit clause etc.. v->searcherLock->Unlock(); } } PostMessage(v->hwnd, WM_USER_THREAD_FINISHED , 0,0); delete v; return 0; } In my main UI class, i have a CListControl that i want to be able to access the shared object (of type std::List). Hence the locking stuff. So this CList has an handler function looking like this : void Ccreationprogramme::OnLvnItemchangedList5(NMHDR *pNMHDR, LRESULT *pResult) { LPNMLISTVIEW pNMLV = reinterpret_cast<LPNMLISTVIEW>(pNMHDR); if((pNMLV->uChanged & LVIF_STATE) && (pNMLV->uNewState & LVNI_SELECTED)) { searcherLock.Lock(); // do the stuff on shared object searcherLock.Unlock(); // do some more stuff } *pResult = 0; } The searcherLock in both function is the same object. The worker thread function is passed a pointer to the CCriticalSection object, which is a member of my dialog class. Everything works but, as soon as i do click on my list, and so triggers the handler function, the whole program hangs indefinitely.I tried using a Cmutex. I tried using a CSingleLock wrapping over the critical section object, and none of this has worked. What am i missing ?

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  • Rails Heroku Gemfile.lock error - push rejected (open source)

    - by KJ50
    I am trying to push my open source RoR application to Heroku but I'm having an issue making the initial push. I have read many similar questions, but none of those answers has helped to solve my problem. I have tried bundle update and bundle install various times. I also have tried removing and then re-committing my Gemfile.lock file, however I get this same error still... $ git push heroku master Counting objects: 5199, done. Compressing objects: 100% (3086/3086), done. Writing objects: 100% (5199/5199), 4.57 MiB | 131 KiB/s, done. Total 5199 (delta 3418), reused 3152 (delta 1962) -----> Removing .DS_Store files -----> Ruby app detected -----> Compiling Ruby/NoLockfile ! ! Gemfile.lock required. Please check it in. ! ! Push rejected, failed to compile Ruby app To [email protected]:frozen-springs-4725.git ! [remote rejected] master -> master (pre-receive hook declined) error: failed to push some refs to '[email protected]:frozen-springs-4725.git' Since my application uses MongoDB with MongoMapper, I suspect that I have some configuration incorrect. My code can be found here on Github (I'm currently working on the heroku branch). Feel free to clone our repository and try it yourself. If anyone has any insight which could help me resolve this issue I would be very thankful!

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  • Download Free PowerShell Quick Reference Guides from Microsoft

    - by Akemi Iwaya
    Are you just getting started with learning PowerShell or tired of looking up less frequently used commands? Then this terrific set of PowerShell quick reference guides from Microsoft is just what you need! The first guide focuses on commonly-used Windows PowerShell commands and is available in a single .doc format document. The other guides are available as a set (six files) in .pdf format and focus on: tips, shortcuts, and common operations in Windows PowerShell 3.0, Windows PowerShell Workflow, Windows PowerShell ISE, Windows PowerShell Web Access, Server Manager for Windows Server 2012, WinRM, WMI, and WS-Man. Keep in mind that you can select all the guides or just the ones you need to download for the PowerShell 3.0 set. Windows PowerShell Quick Reference [Microsoft] Windows PowerShell 3.0 and Server Manager Quick Reference Guides [Microsoft] [via The Windows Club here and here]     

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  • Free Oracle Special Edition eBook - Server Virtualization for Dummies

    - by Thanos
    Oracle has released a quick and easy-to-read guide on Oracle Virtualization. Now available is "Server Virtualization for Dummies," an Oracle Special Edition eBook. Need to virtualize, but not sure where to start? Virtualization should make things simpler, not more complex. To learn more about how Oracle’s server virtualization solutions can help you eliminate complexity, reduce costs, and respond rapidly to changing needs, download Server Virtualization for Dummies, an Oracle Special Edition eBook. Simply discover how virtualization can make things simpler, from server consolidation to application deployment. This eBook guides you through a range of server virtualization topics, including Why virtualization is critical to transforming today's IT to tomorrow's cloud computing environment. How different types of virtualization are suited to different business needs How application-driven virtualization dramatically accelerates application deployment Oracle Virtualization delivers the most complete and integrated solution for building, flexible IT infrastructures—beyond just server virtualization consolidation. Learn how Oracle Virtualization's unique application-driven approach and integrated management offering helps to accelerate enterprise application deployment and simplify management of data center from disk to apps. All our Customers, prospects, and partners are welcome to follow this link to download an exclusive copy of Server Virtualization for Dummies, Oracle Special Edition today.

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  • ‘Assassin’s Creed: Pirates’ now Available to Play In-Browser for Free

    - by Akemi Iwaya
    Are you ready to sail the high seas in search of treasure and adventure? All you need is a browser and the determination to be the ‘King of the Caribbean’ in ‘Assassin’s Creed: Pirates’, the latest in-browser game release from Microsoft! If you are curious as to how this game fits into the broader Assassin’s Creed Universe, here is the answer. From the blog post: Gameplay is based on the iOS “Assassin’s Creed Pirates” game, allowing you to be captain Alonzo Batilla, who is racing his ship through the Caribbean, evading mines and other hurdles, while searching for treasure. Keep in mind that the game is a demo at the moment, but still a lot of fun for any Assassin’s Creed fan! Play the demo and learn more about the game via the links below. Good luck and have fun! Play Assassin’s Creed: Pirates [Demo Homepage] Arrrrrr! ‘Assassin’s Creed Pirates’ – for the Web – now available ['The Fire Hose Blog' - Microsoft] [via The Windows Club]

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  • Does SCP lock the file it is transfering?

    - by thadon
    Have a situation where we have an application log sitting out on an AIX server. The log is being continually written to from the application, and we have users on Windows who want to view the file. What they've been doing is using WinSCP to transfer the file to their desktop and they open it using a text editor. What I think might be happening is scp is locking the file for the duration of the transfer, and the application ceases to be able to write to the file. The reason I believe this is the log file will stop growing at random points during the day. Is that what perhaps is going on?

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  • Free Webinar on Improving Your Customer Experience with Integrated Channels

    - by divya.malik
    Join Oracle's Regional VP of CRM On Demand- Justin Shriber, Selling Power Magazine's CEO, Gerhard Gschwandtner and IDC Research's Gerrard Murray in an interesting discussion on how to "Integrate Sales Channels to Maximize Revenue & Improve the Customer Experience". You will learn how to: - Build a unified revenue pipeline to shorten sales cycles - Deliver a personalized customer experience and maximize up-sell opportunities - Align sales across all interaction, including online, in person, and via mobile devices - Improve the quality of each and every customer interaction Don't miss the opportunity and register now

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  • What is the economic rationale behind programmers who work on a open source project (free) instead of a commercial project (not free)?

    - by Kim Jong Woo
    I can't understand why some people dedicate so much hour into a completely open source project without closing it and yielding greater profit from it. I don't think profiting from your code is evil, I think it's a great motivator. Why do some people feel that commercial software and generating money from it is bad? There seems to be this black and white thinking that open source = good, commercial = bad. I hardly find this convincing, and often commercial companies which are supported by sales produce very good results. An open source software in the same niche can't compete against the corporation. Of course, sometimes this is completely the other way around where private companies produce inferior product compared to open source counterparts. So help me understand, why do programmers open source their code when there is commercial prospects for it? Shouldn't the rational programmer or human being make every effort to capitalize on their opportunity cost? Working on a open source project for months when you could've spent the same number of hours at commidity wage or some other monetary compensation?

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  • How to Create Quality Photo Prints With Free Software

    - by Eric Z Goodnight
    Photoshop may be the professional standard for high quality photo prints, but that doesn’t mean you have to pay hundreds of dollars for printing software. Freeware program Google Picasa can create excellent quality photo prints that’ll only cost you a download. Picasa and other freeware graphics programs are hardly news to savvy geeks, although with a little patience, they can produce quality prints few could tell apart from thousand dollar graphics suites. Stay tuned for links to various graphics programs, and a simple how-to on getting the perfect print settings for your photos Latest Features How-To Geek ETC The Complete List of iPad Tips, Tricks, and Tutorials The 50 Best Registry Hacks that Make Windows Better The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor Deathwing the Destroyer – WoW Cataclysm Dragon Wallpaper Drag2Up Lets You Drag and Drop Files to the Web With Ease The Spam Police Parts 1 and 2 – Goodbye Spammers [Videos] Snow Angels Theme for Windows 7 Exploring the Jungle Ruins Wallpaper Protect Your Privacy When Browsing with Chrome and Iron Browser

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  • How to lock Windows7 from installing anything.

    - by Andy
    A family member continually needs me to reinstall his PC after it gets viruses and spyware. He claims that he never downloads anything but evidence suggests otherwise. Unless there is some way that watching 'videos' can get spyware on there. AFAIK the computer is kept up to date. Possible solutions? Make a login where its impossible for him to install anything. Windows 7 standard account doesn't appear to be enough. Is a standard account enough here? I tried this once before and he still seemed to get IE toolbars installed up the wazoo Somehow make an automated image where if he 'messes up' or even on log off the computer restores the whole drive image. Similar to what I've seen in Kinko's Something I've not thought of.... And I know you are all going to say 'stop fixing it you are an enabler'... yes I know but I'm not going to have another fight with my wife over helping her family... right now I'm doing this to keep her happy not the idiot with the 'video' addiction ;-) So the name of the game is minimizing my overhead.

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  • SCALE 8x: Free software legal issues

    <b>LWN.net:</b> "But in reality the FLOSS ecosystem relies on a complex legal framework in order to run smoothly and to stand up to proprietary software competition: the various software licenses, contribution agreements, copyright and other "intellectual property" law."

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