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Search found 1137 results on 46 pages for 'optimistic locking'.

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  • Keeping files private on the internet (.htaccess password or software/php/wordpress password)

    - by jiewmeng
    I was asked a while ago to setup a server such that only authenticated users can access files. It was like a test server for clients to view WIP sites. More recently, I want to do something similar for some of my files. Tho they are not very confidential, I wish that I am the only one viewing it. I thought of doing the same, Create a robots.txt User-agent: * Disallow: / Setup some password protection, .htpasswd seems like a very ugly way to do it. It will prompt me even when I log into FTP. I wonder if software method like password protected posts in Wordpress will do the trick of locking out the public and hiding content from Search Engines? Or some self made PHP script will do the trick?

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  • Screen will not lock automatically 12.10

    - by swalker2001
    Since upgrading to 12.10 I cannot get my screen to lock automatically. I am using GDM at home and LightDM at work and neither will lock automatically. However, when I issue CTRL + ALT + L on either system, the screen will lock as it should. It is set to turn the display off after 5 minutes and lock screen when screen turns off. Require Password is set also. Display turns off after 5 minutes but no locking occurs. I am using Unity with Compiz on both systems. Not sure what other things might be involved.

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  • Commands to run when Connecting HDMI

    - by yurividal
    Everytime I connect my pc to my tv using my HDMI cable (to watch my movies), I have to manually go to: 1- Monitors, to select "mirror" screen to HDMI 2- Sound, to select the HDMI as default sound output 3- Screen Off an Lock, to avoid screen locking while watching a video. Is there a way I can automate this? Or at least write a script with commands that will do this. (I could manually run a script every time I connect my HDMI, and then run annother one to undo the changes later) How can I do these actions from a Command Line?

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  • how to find 3g modem signal strength with out AT commands?

    - by neckTwi
    when i try to find signal strength of my modem using AT+CSQ, the usb device is locked by the network manager. To find the signal strength with AT+CSQ i have to first disable network connection using #nmcli nm wwan off to unlock the device inode /dev/ttyUSBX. Is there any nmcli option to get signal strength or any other option? EDIT The gdbus object for NetworkManager don't have any method like getSignalStrength. Network manager is locking device file preventing to use AT commands. nm-applet was able to display signal strength in system tray. so there should be a way to get signal strength form network manager! nmcli is command line counter part of nm-applet. Can i get signal strength using nmcli? nothing about signal strength is mentioned in its man pages.

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  • System locks up at login after latest update on 12.04

    - by RCD
    For starters, I am a noob when it comes to Ubuntu and Linux...but I am hopeful that I have the "light" and the error of my past MS ways :) ..... After a recent update last week from 12.04 to 12.04.1 my system now locks up at the login screen. Before the update the system would run but must admit it ran EXTREMELY slow. I have installed 12.04 on a Dell P4 2.4 Ghz, 2 GB DDR Ram, 80 GB IDE HD and an integrated Intel 3D Extreme Graphics. Any ideas on why now the system locking up at login screen? Appreciate any ideas and/or tips Thanks

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  • C++ compiler structures such as Virtual method Table etc

    - by Roger
    I am aware of the C++ Virtual Table which allows dynamic dispatch for doing things at runtime (although if I am honest I am not completely sure of the full list of things it achieves). I am wondering what other "low level" aspects of C++ are there, which one doesnt usually come across when learning the C++ language? Things like: -How is multithreading and locking on objects performed? -Overloading/overwriting functions -Generics Are there other "structures", similar to the vtable, which assist with these types of things on a lower level? (and if anyone can help with what the VTable actually does it would be most appreciated!)

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  • hotkeys do not work sometimes in ubuntu 12.04

    - by stepank
    I use Ubuntu 12.04 with Unity 2D and I've stumbled upon this issue: sometimes shortcut keys stop working in some windows. For instance, I have these windows opened usually: Google Chrome, Terminal, Skype, Pidgin. Sometimes everything is OK and shortcuts work no matter what window I hit them from, however, hotkeys hit from Skype (more often) or Pidgin (less often) do not work, but they still work from Terminal or Google Chrome. Moreover, not all hotkeys are affected, the problem holds only for locking the computer (Ctrl + Alt + L) and other custom shortcuts like executing some command or launching a program (I used zenity --entry with [Super | Ctrl] + [some letter: K, N, etc] for testing). Does anyone have a clue what is causing the problem and how to fix it?

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  • How to find out which process actually locks your dll when SharePoint Solution deployment failed

    - by ybbest
    When your SharePoint Solution package include third party or external dlls , you will often see your solution fail to deploy due to the locking of the dlls. Today I will show you how to find which process locks your dlls using Process Explorer. 1. Here is an example that your solution fails to deploy due to dll being locked. 2. Start the explorer by double click the procexp.exe 3. From the find tab click Find Handle or DLL 4.Type the your dll name and click Search 5. I can see all the processes that use my dlls at the moment, it looks like the iis , visual studio and SharePoint timer services might be the trouble. From my experience , it could be Visual studio. 6. Close visual studio and redeploy my solution, it works like charm. Re-search the dll, you can see Visual studio is not in the results.

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  • Ubuntu 12.04 freezing on startup

    - by Frank
    Have been looking everywhere to find a solution to this problem but have yet to find a solution. I am running 64 bit 12.04 LTS on a AMD C-50 Dual core 6 gigs ram AMD Ratheon HD 6250. The problem I am experiencing is when ubuntu gets to the wallpaper screen it will sometimes freeze soon after the the image appears or shortly there after gnome loads locking up keyboard and mouse. When I try to log in via the console the same thing happens (this is as ubuntu is loading). At the moment the system is set to auto login previously it was set to ask for password but it did the same thing. Switching to from lightdm to gdm did nothing to alleviate the issue. I have never had so many issues with ubuntu I have to say 12.04 is the most buggy version yet.

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  • how to serialize function depending on what instance of object calls it, if same instance call in a thread then do serialize else not

    - by LondonDreams
    I have a function which fetches and updates some record from db and I am trying to make sure each if the function is called by same instance of object(same Or different thread) then function should behave synchronized else its a call from different object instance function need not to be synchronized. I have tried it use a lock per client. That is, instead of synchronizing the method directly using explicit locking through lock objects using Map. function is like :- getAndUpdateMyHitCount(myObjId){ //go to db and get unique record by myObjId //fetch value , increment , save update } And this function may get call is same thread by different Or same object instance But as fetching and matching from Map is slow , Is there other optimized way to do this ? Found similar at this Question but dont feel that is optimized

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  • System crashed while upgrading, now unable to recover. Please help

    - by longloop
    Yesterday while upgrading from 11.4 to 11.10, due to power cut my system crashed. Ubuntu is unable to boot. While booting I get two options in grub, one is for recovery mode and the other is for normal ubuntu booting (and others are also thr for mem check and booting to windows). When I try to boot it normally, it pauses booting while displaying ' Checking battery statues' . Though i am not using a laptop, I am on a desktop. And In recovery mode the menu has 4 options - resume boot, fsck , remount and root ( to goto shell prompt) . If I go to shell and type ' apt-get dist upgrade' , it shows - W: not using locking for read only lock file /var/lib/dpkg/lock E:unable to write to /var/cache/apt E:The package lists or status files could not be parsed or opened. Please instruct me to recover from this situation.

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  • Python: Random is barely random at all?

    - by orokusaki
    I did this to test the randomness of randint: >>> from random import randint >>> >>> uniques = [] >>> for i in range(4500): # You can see I optimistic. ... x = randint(500, 5000) ... if x in uniques: ... raise Exception('We duped ' + str(x) + ' at iteration number ' + str(i)) ... uniques.append(x) ... Traceback (most recent call last): File "(stdin)", line 4, in (module) Exception: 'We duped 4061 at iteration number 67 I tried about 10 times more and the best result I got was 121 iterations before a repeater. Is this the best sort of result you can get from the standard library?

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  • .NET Reactor - How to Protect 64-bit Assemblies

    - by Cocowalla
    I have build 64-bit (x64) versions of some assemblies and am trying to obfuscate them with .NET Reactor, which claims to have 64-bit support. However, even if I disable all protection and locking options .NET Reactor is always producing 32-bit assemblies! Does anyone know how to get .NET Reactor to produce 64-bit assemblies?

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  • How to secure a WCF service using NetNamedPipesBinding so that it can only be called by the current

    - by Samuel Jack
    I'm using a WCF service with the NetNamedPipesBinding to communicate between two AppDomains in my process. How do I secure the service so that it is not accessible to other users on the same machine? I have already taken the precaution of using a GUID in the Endpoint Address, so there's a little security through obscurity, but I'm looking for a way of locking the service down using ACL or something similar.

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  • .net thread safety

    - by george9170
    Why is locking a type considered very bad? For example, lock(typeof(DateTime)) I understand that static methods of any class in .net is considered thread safe, and that instance members are not. So it isn't necessary to lock DateTime while you are using it. The book I am reading doesn't explain why it is bad it just says it is. Any explanation will be great.

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  • Passing a SAFEARRAY from C# to COM

    - by SlavaGu
    I use 3rd party COM to find faces in a picture. One of the methods has the following signature, from SDK: long FindMultipleFaces( IUnknown* pIDibImage, VARIANTARG* FacePositionArray ); Parameters: pIDibImage[in] - The image to search. FacePositionArray[out]- The array of FacePosition2 objects into which face information is placed. This array is in a safe array (VARIANT) of type VT_UNKNOWN. The size of the array dictates the maximum number of faces for which to search. which translates into the following C# method signature (from metadata): int FindMultipleFaces(object pIDibImage, ref object pIFacePositions); Being optimistic I call it the following way but get an exception that the memory is corrupt. The exception is thrown only when a face is present in the image. FacePosition2[] facePositions = new FacePosition2[10]; object positions = facePositions; int faceCount = FaceLocator.FindMultipleFaces(dibImage, ref positions); What's the right way to pass SAFEARRAY to unmanaged code?

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  • RESTlet startup initialization deprecated?

    - by Chris Kaminski
    I'm trying to use the restlet.org library to build a RESTful web interface, and I've noticed that unlike it's servlet counterpart, it has no complement to GenericServlet.init(). Short of building another servlet to do my startup logic, is there any built-in way to avoid building my database factories and the like on the first request (and all the commensurate locking I'll have to do to avoid multiple initializations)?

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  • How we can lock a table using PHP / Drupal

    - by Kamal Challa
    Hi iam developing a module in Drupal, which needs to have a locking machanism, When one user operating on form submission other should nt take action, How do i can achieve this in php/drupal iam using mysql database with MyISAM/INNODB Please help me Thanks in advance Kamal

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  • What are jQuery best practices regarding Ajax convenience methods and error handling?

    - by JonathanHayward
    Let's suppose, for an example, that I want to partly clone Gmail's interface with jQuery Ajax and implement periodic auto-saving as well as sending. And in particular, let us suppose that I care about error handling, expecting network and other errors, and instead of just being optimistic I want sensible handling of different errors. If I use the "low-level" feature of $.ajax() then it's clear how to specify an error callback, but the convenience methods of $.get(), $.post(), and .load() do not allow an error callback to be specified. What are the best practices for pessimistic error handling? Is it by registering a .ajaxError() with certain wrapped sets, or an introspection-style global error handler in $.ajaxSetup()? What would the relevant portions of code look like to initiate an autosave so that a "could not autosave" type warning is displayed if an attempted autosave fails, and perhaps a message that is customized to the type of error? Thanks,

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  • Linq2SQL using Update StoredProcedure

    - by PeterTheNiceGuy
    We use queries generated by Linq for data retrieval but for INSERT and UPDATE we do not allow generated SQL, but restrict to the use of stored procedures. I connected the Update and the Insert behaviour in the DBML to the stored procedures. The procedures are called, the data gets inserted/updated = all if fine, except in the case of optimistic concurrency. If a record was changed between retrieval and update, the update should fail. When Linq generates the Update statement itself, it throws a ChangeConflictException as expected, but using the stored procedure no Exception is thrown. Thanks a lot for any help on this!

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  • How do I use SVN effectively?

    - by Tim Rogers
    I have an SVN repository that I've set up on my VPS, and I know all the basics (update, commit), but I don't know what all the other options mean. I am running TortoiseSVN on Windows (which is great!) and can see all these features like branching, locking, merging and patching! What do all these things mean? Is there anywhere with a good guide about how all the little bits and pieces in SVN work? Thanks, Tim

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  • Thread safety in Singleton

    - by Robert
    I understand that double locking in Java is broken, so what are the best ways to make Singletons Thread Safe in Java? The first thing that springs to my mind is: class Singleton{ private static Singleton instance; private Singleton(){} public static synchronized Singleton getInstance(){ if(instance == null) instance = new Singleton(); return instance; } } Does this work? if so, is it the best way (I guess that depends on circumstances, so stating when a particular technique is best, would be useful)

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  • .htaccess query string with static page

    - by Wes
    So, unfortunately im using vBulletin with Kohana and my integration is getting a bit complicated locking vBulletin out. Doing some rewrites, this in particular RewriteCond %{QUERY_STRING} ^do=(editprofile|editoptions)$ RewriteRule ^forum/profile.php$ /user_profile/edit/ [R=301,L] Comes back with /user_profile/edit/?do=editprofile where I need /user_profile/edit/ Cheers, Wes

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