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  • Add folder name to beginning of filename - getting multiple renames

    - by Flibble Wibble
    I've used dbenham's excellent response to the question of how to add the folder name to the beginning of a filename in a cmd script. @echo off pushd "Folder" for /d %%D in (*) do ( for %%F in ("%%~D\*") do ( for %%P in ("%%F\..") do ( ren "%%F" "%%~nxP_%%~nxF" ) ) ) popd What I'm finding is that seemingly randomly (though it probably isn't) sometimes the script will run through several child folders and rename correctly but then it gets to a folder where it gets stuck in a loop and starts adding the folder name repeatedly to the file inside. I have 90,000 files in 300 folders to rename this weekend. Any chance you can guess the cause? PS: Is there a maximum number of files that are acceptable in each folder?

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  • Is it possible to re-create the Windows 8.1 install image after the upgrade

    - by rossmcm
    I have downloaded and installed the Windows 8.1 upgrade from the Windows store. The hardware was a 64-bit Toshiba P50 laptop. I need to upgrade a second P50 and wish to do so without another 3.6Gb download (I tried the instructions here but never got the chance to create the installation media, nor was I asked for a product key). I saw mention on superuser of creating USB rescue media after installation and using that to clone the upgrade onto another machine. Is this likely to be a viable option?

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  • Odd Language In a BIOS Message

    - by Josh
    So I started up my laptop today and was greeted with the following message (not a direct quote): The type of the AC adapter cannot be determined. This may interfere with your computer's performance. Try unplugging the AC adapter and then plugging it back in, thanks. The problem was that I hadn't fully secured the plug into the back of the computer. However, I was a little taken aback when a message from BIOS said, "thanks." Is this normal? Any chance the message was illegitimate (virus)?

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  • Remote I/O costs with a Content Delivery Network

    - by x711Li
    As far as I know, the time complexity of scanning a directory and the amount of files in said directory are correlated due to I/O costs. Would the administrative costs of placing the files in a hashed directory tree for uploading/downloading files through a CDN API be worth it for the added efficiency? For instance, given a filename foo.mp3, the MD5 hash for this is 10ebb1120767e9de166e0f5905077cb1. Thus, storing foo.mp3 in ./10/eb/foo.mp3 would allow for less files per directory (assuming MD5 generates patterns with in Base36, this allows for 36^2 root directories with 36^2 subdirectories each and little chance of hash collision) Considering the directories themselves are not loaded, would the I/O costs of directory scanning still exist with direct uploading/downloading?

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  • Windows 7 automatically install usb driver

    - by Dan
    I have tried to install usb driver for Samsung arndale on Windows 7. Now it has two entries in Device Manager. I can not uninstall the one with question mark. If I uninstall both of them, when I plug in the hardware, Windows 7 will automatically install both of the entries when the circuit pulg in. I don't get the chance to choose the right driver. When I try to update the wrong driver, it says found the driver but can not install it.

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  • set chars to uppercase between parenthesis

    - by emzap79
    let's assume in vim I have following lines: all what (strong) people have to do is pushing (heavy) weights over (and over) again in order to gain muscles and I need to convert words inside parenthesis to uppercase, what is the most convenient way to do so? How do I tell vim it needs to select everything to the first (!) closing parenthesis? So far I came up with :%s/\s(.*)\s/\U&/g unfortunately this will uppercase everything between 'strong' and 'heavy' which is not what I want. Any chance to tell vim it should select the chars to the next closing bracket only? (sorry for the silly example, couldn't think of something more sophisticated... or at least vim related... huh)

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  • Ubuntu Lucid (10.04) subpixel font rendering crashes Xorg

    - by user36066
    Hi everyone... I really don't know how to solve this on my own so I thought giving this site a chance. After upgrading to Lucid I ran into some problems. With some experimenting I came to a conclusion that if I enable subpixel smoothing on fonts the moment I start any other application not native to GTK+ (wine, openoffice, wxWidgets, ...) my X server crashes the same moment. At first this seemed like something went wrong during installation. To cut the long story short, after 3 clean installations and whole bunch of experimenting the same thing happens all over again. Strange thing is... if I configure any other font smoothing besides subpixel, everything works like it should. Any thoughs?

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  • How to get the CentOS 5.6 alsa drivers which will really work with one shot, without any internet.

    - by 89899.3K
    I have one chance to install this in my server on site. Server that i am running is CentOS 5.6 (Dell R310, RAID1) where i need to install alsa-sound driver so that anything related to audio recording from rtsp is working (rail station/rail passing video recording including audio, where audio is not working). Unfortunately i do not have any kind of internet in that odd none human location so yum will not work for me. I need a offline way to install alsa drivers including missing dependencies if arise. What and where i can download this to my usb or cd? so that i can successfully install it (like mission complete). Thanks

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  • How to block a website completely?

    - by user37076
    I want to block some sites(e.g. youtube,news sites ), because I have a problem with procrastination and I find these websites affect my productivity very much. I used to block them by adding them to HOSTS file. However, gradually every time I want to take a break, I open the hosts file and comment my block again. Is there any way I can block the websites and cannot (at least a little bit hard, e.g. I have to reboot my pc) unblock them. I have no access to the router or any firewall, besides the ones on my computer. I just want to FORCE myself to work without any chance to procrastinate.

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  • Ultrabooks and projectors: is there any connectivity issue due to low power on video output? [closed]

    - by sergey
    I need to buy a new laptop for my wife. She travels a lot and I was thinking about an ultrabook (1.5-2 kg). However she says that ultrabooks have problems connecting to projectors. At least some of her colleagues could not connect their ultrabooks to projectors due to “low output issues”. She is in-company consultant and trainer and for her “be able to connect to any client projector” requirement is must. Thus my doubts are: Is this problem well known? Is there any chance to assure connectivity to projector (by checking some specification before buy, etc)?

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  • Is it possible to access internet on smart-phone through usb (no wi-fi) using Laptop as the modem?

    - by Prahlad Yeri
    One of my relatives has a nokia 5235 smartphone. It is good, but the only limitation is - there is no wifi. bluetooth & usb are the only connectivity options. His laptop has an unlimited broadband but no support for bluetooth, so basically usb is the only method by which he can connect the mobile with laptop. Now, he can do a file-transfer between these two devices, but by any chance, is there a way by which we can share the Laptop's internet connection through usb to the smart-phone? So, bascially its like this: Broadband-modem = Laptop =usb= smart-phone -(want to use internet here) Are there any software or utilities available to achieve this ?

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  • how to recover data from my disk - I accidentally copied with dd an iso on it

    - by sijoune
    I wanted to create a bootable usb from an iso image and i accidentally put as the output of the dd, instead of my usb drive, one of my hard disks. The iso was 3,3 GB and my disk is 1TB! And it was almost full. Can i at least restore the data that has not been overwritten? Right now i can't even mount it. I get this error: Error mounting /dev/sdd1 at /media/main/UDF Volume: Command-line `mount -t "udf" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,iocharset=utf8,umask=0077" "/dev/sdd1" "/media/main/UDF Volume"' exited with non-zero exit status 32: mount: wrong fs type, bad option, bad superblock on /dev/sdd1, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so Also since i know which filesystem my disk used if i reformat it to this filesystem is there any chance i can mount it and retrieve the rest of the files?

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  • How to avoid specifying full path in sudoers file?

    - by s g
    I am trying to add a NOPASSWD entry for sudotest.sh (or any script/binary that requires sudo) in my /etc/sudoers file (on Ubuntu 12.04 LTS server), but in order to make it work, I must specify the full path. The following entry works just fine: %jenkins ALL=(ALL)NOPASSWD:/home/vts_share/test/sudotest.sh The problem is that the script might move to a different directory. This seems like a great chance to use the * wildcard in the path (i.e. /*/sudotest.sh) so that my script could be in any directory but the manual states that wildcards will not match the / character when used in a path. I've confirmed that it doesn't work. I know that I can use the word ALL in place of my script, but this means there is no password prompt for any commands which seems unsafe. How do I solve this?

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  • How to know if a server is physical or virtual? [duplicate]

    - by tachomi
    This question already has an answer here: is there anyway to know if your supposedly fully dedicated server is really a virtually resource-shared machine? [duplicate] 5 answers How can I know if my provider is giving me a dedicated physical server or if I'm getting virtual servers? The provider is from an other country so I don't have the chance to go and see the servers by myself, all of them have linux and they're managed by SSH. All the hire has been done by internet or phone. Are there any commands, dirs to analyze or a way to get this info? They of course tell me that the servers are physical, but when they make some support or hardware/software upgrade or that kind of stuff doesn't take a long. For example, when I ask for a new one with specific requirements at the end they give me more infrastructure than the one I asked for. Of course no one gives extra things without an extra price. Hope I have hinted

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  • Access violation when accessing a COM object from .Net

    - by Groo
    Dear Sirs, I am sorry if the post is too long, but I would be happy if someone would at least point read the bolded titles, and point me in the right direction. I am having this problem for couple of days, but was unable to found the answer on the net. These are the things I have found out so far. 1. "Access violation" exception crushes my managed application My C# WinForms app sometimes closes with an "Access violation" exception ("Attempted to read or write protected memory"), right in the moment when selecting a TabPage in a windows form TabControl. From the stack trace (try/catch around Application.Run) I can see that the exception happens at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg), called inside UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData). -- Message: Attempted to read or write protected memory. This is often an indication that other memory is corrupt. -- Stack trace: at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg) at System.Windows.Forms.Application.ComponentManager .System.Windows.Forms.UnsafeNativeMethods .IMsoComponentManager.FPushMessageLoop (Int32 dwComponentID, Int32 reason, Int32 pvLoopData) at System.Windows.Forms.Application.ThreadContext .RunMessageLoopInner(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.ThreadContext .RunMessageLoop(Int32 reason, ApplicationContext context) at System.Windows.Forms.Application.Run(ApplicationContext context) at MyApp.Program.Main() 2. The faulting module seems to be a COM object (ChartFX Client Server 6.2) Using WinDbg (with SoS loaded), I caught it on the unmanaged side, inside ChartFX.ClientServer.Core.dll (that's a COM charting component we are using): (ca84.c98c): Access violation - code c0000005 (first chance) First chance exceptions are reported before any exception handling. This exception may be expected and handled. eax=00000000 ebx=06e67c38 ecx=06e67c38 edx=000018c6 esi=06e7df30 edi=317a9e80 eip=31666110 esp=0015e040 ebp=0015e08c iopl=0 nv up ei pl zr na pe nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246 ChartFX_ClientServer_Core!Ordinal5507+0x97b7: 31666110 8a404d mov al,byte ptr [eax+4Dh] ds:0023:0000004d=?? [edit:] I also wasn't able to get the unmamanged stack details from WinDbg (it said "Stack unwind info not available"): 0:000 kP ChildEBP RetAddr WARNING: Stack unwind information not available. Following frames may be wrong. 0015e08c 3166288b ChartFX_ClientServer_Core!Ordinal5507+0x97b7 0015e394 3165a921 ChartFX_ClientServer_Core!Ordinal5507+0x5f32 0015e480 31678685 ChartFX_ClientServer_Core!Ordinal5496+0x26a 0015e568 3167bef4 ChartFX_ClientServer_Core!Ordinal5492+0x975 0015e668 316a356b ChartFX_ClientServer_Core!Ordinal5492+0x41e4 0015e77c 31709496 ChartFX_ClientServer_Core!Ordinal443+0x5745 0015e7d0 31707f70 ChartFX_ClientServer_Core!Ordinal2584+0x3cdc 0015e7f8 3170817d ChartFX_ClientServer_Core!Ordinal2584+0x27b6 0015e81c 3162fd76 ChartFX_ClientServer_Core!Ordinal2584+0x29c3 0015e86c 7719f8d2 ChartFX_ClientServer_Core!Ordinal899+0x6b6 0015e898 7719f794 USER32!GetMessageW+0x93 0015e910 771a06f6 USER32!GetWindowLongW+0x115 0015e940 771a069c USER32!CallWindowProcW+0x75 0015e960 747fcef4 USER32!CallWindowProcW+0x1b 0015e97c 747fd073 comctl32!Ordinal377+0x5c 0015e9e0 747fd027 comctl32!DefSubclassProc+0x92 0015ea04 747fd4e6 comctl32!DefSubclassProc+0x46 0015ea20 747fd073 comctl32!DefSubclassProc+0x505 0015ea84 747fd118 comctl32!DefSubclassProc+0x92 0015eae4 7719f8d2 comctl32!DefSubclassProc+0x137 3. Bug is not easy to reproduce (although it can be provoked usually in less than 5 min.) I have several Chart instances in several TabPages, and this usually happens while I am switching the tabs. I still don't know how to reproduce it, besides switching those tabs for several minutes before it happens, so I cannot use our source control to reliably find the build which didn't have this problem. I am accessing the charts through the managed AxChart wrapper class (derived from AxHost), which was created by VS designer automatically. 4. What should be my next step? If someone could point me to the next step I should do to find the actual cause, I would be very grateful. Experimenting (removing and returning code) does not do much good, because I don't know how to reproduce it, so it would take large amounts of time on each iteration just to convince myself that the bug is still there. I have found that people often suggest something like "switching compiler optimizations", but since the exception is not thrown deterministically, I don't want to simply rearrange some bytes and hope that it never returns. Thanks a lot in advance! Best regards, Groo

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  • How can I read this IIS error log?

    - by Victor Rodrigues
    I'm using Debug Diagnostic Tool, trying to understand why around 5% of the requests that are sent to my webservice just crash, without necessarily throw any error inside my application. One of the errors this tool took is below. Can anyone here understand exactly what could be happening? Thanks! [6/17/2010 5:32:58 PM] First chance exception - 0xe0434f4d caused by thread with system id 1736 [6/17/2010 5:32:58 PM] Stack Trace ChildEBP RetAddr Args to Child WARNING: Stack unwind information not available. Following frames may be wrong. 1c5bec58 79ef2bbc e0434f4d 00000001 00000001 kernel32!RaiseException+0x3c 1c5becb8 79fccf80 0a6d4998 00000000 00000000 mscorwks!GetMetaDataInternalInterface+0x84a9 1c5bed7c 656cab0e 0a6d4788 1c5bed98 65221345 mscorwks!StrongNameErrorInfo+0x103dc 1c5bed88 65221345 0a6cefb0 1c5bedf8 1c5bee08 System_Data_ni+0x57ab0e 1c5bee0c 79e7e1f3 1c147158 1c147158 0a6d0710 System_Data_ni+0xd1345 1c5bee24 79f7c770 0a6d0710 1c147158 026f25a8 mscorwks!DllUnregisterServerInternal+0x21d7 1c5beee8 79e71b4c 0a6cd9b8 0a6cd994 026f409c mscorwks!CorExitProcess+0x28f9a 1c5bef00 79e821b9 1c5befd8 00000002 1c5befa0 mscorwks+0x1b4c 1c5bef80 79e96531 1c5befd8 00000002 1c5befa0 mscorwks!DllUnregisterServerInternal+0x619d 1c5bf0c8 79e96564 1c531688 1c5bf228 1c5bf120 mscorwks!CoUninitializeEE+0x2ead 1c5bf0e4 79e96582 1c531688 1c5bf228 1c5bf120 mscorwks!CoUninitializeEE+0x2ee0 1c5bf0fc 79f87a83 1c5bf120 1c5bf2e0 79fa6a6b mscorwks!CoUninitializeEE+0x2efe 1c5bf2ec 79f87be2 00629d50 0a6cdae8 0a6d0e04 mscorwks!CorExitProcess+0x342ad 1c5bf3ac 792d5348 00629d90 00000086 1c5bf3c8 mscorwks!CorExitProcess+0x3440c 1c5bf3fc 792d50f6 00629d90 00000086 066a1ae0 mscorlib_ni+0x215348 1c5bf434 792d4fde 00000000 00000000 0a6cd944 mscorlib_ni+0x2150f6 1c5bf488 65e1098e 0a6cd944 00000000 00000000 mscorlib_ni+0x214fde 1c5bf4cc 65e10665 66082f99 0a6ca144 00000000 System_Web_Services_ni+0x13098e 1c5bf4fc 65e10ff7 026c1054 0a6ca168 0a6ace9c System_Web_Services_ni+0x130665 1c5bf510 6dde7666 1c5bf54c 660adb16 6ddd2c34 System_Web_Services_ni+0x130ff7 1c5bf518 660adb16 6ddd2c34 0a6ace8c 0a6c883c System_Web_Extensions_ni+0x1c7666 1c5bf54c 6608132c 1c5bf578 0a6c883c 00000000 System_Web_ni+0x18db16 1c5bf588 6608c5c3 1c5bf5b0 0a6abecc 0a6c8b4c System_Web_ni+0x16132c 1c5bf5dc 660808ac 0a6c8218 0a6abecc 026c0d48 System_Web_ni+0x16c5c3 1c5bf5f0 66083e1c 0a6c883c 026c1054 0a6c883c System_Web_ni+0x1608ac 1c5bf62c 66083ac3 026bc67c 0a6c8400 1c5bf6b0 System_Web_ni+0x163e1c 1c5bf63c 66082c5c 8984fdc8 79e7a6b8 1c5bf858 System_Web_ni+0x163ac3 1c5bf6b0 79f9811e 00000002 01b93b00 026cf6e4 System_Web_ni+0x162c5c 1c5bf768 79f9822b 0017a0d0 1c5bf970 1c5bf9e8 mscorwks!CorExitProcess+0x44948 1c5bf7c4 79f98691 0017a0d0 1c5bf970 1c5bf9e8 mscorwks!CorExitProcess+0x44a55 1c5bf9d0 6a2aa19b 00000001 01b93b00 00000000 mscorwks!CorExitProcess+0x44ebb 1c5bf9f0 6a2aa19b 023ad3f0 01b93b00 00000002 webengine!BufferPoolReleaseBuffer+0x1bb 1c5bfa28 79e72032 79e821f6 e5934469 0017a0d0 webengine!BufferPoolReleaseBuffer+0x1bb 00000000 00000000 00000000 00000000 00000000 mscorwks+0x2032 [6/17/2010 5:33:00 PM] First chance exception - 0xe0434f4d caused by thread with system id 3252 [6/17/2010 5:33:00 PM] Stack Trace ChildEBP RetAddr Args to Child WARNING: Stack unwind information not available. Following frames may be wrong. 01d0ecd8 79ef2bbc e0434f4d 00000001 00000001 kernel32!RaiseException+0x3c 01d0ed38 79fccf80 02748edc 00000000 00000000 mscorwks!GetMetaDataInternalInterface+0x84a9 01d0edfc 656cab0e 02748ccc 01d0ee18 65221345 mscorwks!StrongNameErrorInfo+0x103dc 01d0ee08 65221345 027434d0 01d0ee78 01d0ee88 System_Data_ni+0x57ab0e 01d0ee8c 79e7e1f3 1c147158 1c147158 02744c30 System_Data_ni+0xd1345 01d0eea4 79f7c770 02744c30 1c147158 026f25a8 mscorwks!DllUnregisterServerInternal+0x21d7 01d0ef68 79e71b4c 02741ed8 02741eb4 026f409c mscorwks!CorExitProcess+0x28f9a 01d0ef80 79e821b9 01d0f058 00000002 01d0f020 mscorwks+0x1b4c 01d0f000 79e96531 01d0f058 00000002 01d0f020 mscorwks!DllUnregisterServerInternal+0x619d 01d0f148 79e96564 1c531688 01d0f2a8 01d0f1a0 mscorwks!CoUninitializeEE+0x2ead 01d0f164 79e96582 1c531688 01d0f2a8 01d0f1a0 mscorwks!CoUninitializeEE+0x2ee0 01d0f17c 79f87a83 01d0f1a0 01d0f360 79fa6a6b mscorwks!CoUninitializeEE+0x2efe 01d0f36c 79f87be2 00629d50 02742008 02745324 mscorwks!CorExitProcess+0x342ad 01d0f42c 792d5348 00629d90 00000086 01d0f448 mscorwks!CorExitProcess+0x3440c 01d0f47c 792d50f6 00629d90 00000086 066a1ae0 mscorlib_ni+0x215348 01d0f4b4 792d4fde 00000000 00000000 02741e64 mscorlib_ni+0x2150f6 01d0f508 65e1098e 02741e64 00000000 00000000 mscorlib_ni+0x214fde 01d0f54c 65e10665 66082f99 0273e664 00000000 System_Web_Services_ni+0x13098e 01d0f57c 65e10ff7 026c1054 0273e688 0a6ace9c System_Web_Services_ni+0x130665 01d0f590 6dde7666 01d0f5cc 660adb16 6ddd2c34 System_Web_Services_ni+0x130ff7 01d0f598 660adb16 6ddd2c34 0a6ace8c 0272cce4 System_Web_Extensions_ni+0x1c7666 01d0f5cc 6608132c 01d0f5f8 0272cce4 00000000 System_Web_ni+0x18db16 01d0f608 6608c5c3 01d0f630 0a6abecc 0272cff4 System_Web_ni+0x16132c 01d0f65c 660808ac 0272c6c0 0a6abecc 026c0d48 System_Web_ni+0x16c5c3 01d0f670 66083e1c 0272cce4 026c1054 0272cce4 System_Web_ni+0x1608ac 01d0f6ac 66083ac3 026bc67c 0272c8a8 01d0f730 System_Web_ni+0x163e1c 01d0f6bc 66082c5c 8984fdc8 79e7a6b8 01d0f8d8 System_Web_ni+0x163ac3 01d0f730 79f9811e 00000002 01b93b00 026cf6e4 System_Web_ni+0x162c5c 01d0f7e8 79f9822b 000dcea8 01d0f9f0 01d0fa68 mscorwks!CorExitProcess+0x44948 01d0f844 79f98691 000dcea8 01d0f9f0 01d0fa68 mscorwks!CorExitProcess+0x44a55 01d0fa50 6a2aa19b 00000001 01b93b00 00000000 mscorwks!CorExitProcess+0x44ebb 01d0fa70 6a2aa19b 023ad3f0 01b93b00 00000002 webengine!BufferPoolReleaseBuffer+0x1bb 01d0fac8 79e79cba 79e79ccd 0000000d 00000000 webengine!BufferPoolReleaseBuffer+0x1bb 01d0facc 79e79ccd 0000000d 00000000 79ec3f4b mscorwks+0x9cba 01d0fad8 79ec3f4b 79e7c82c 79ec3f53 f818458d mscorwks+0x9ccd 00000000 00000000 00000000 00000000 00000000 mscorwks!CreateAssemblyNameObject+0x22f40 [6/17/2010 5:33:37 PM] Thread exited. Exiting thread system id - 2144. Exit code - 0x00000000

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  • What does this IIS error log mean?

    - by Victor Rodrigues
    I'm using Debug Diagnostic Tool, trying to understand why around 5% of the requests that are sent to my webservice just crash, without necessarily throw any error inside my application. One of the errors this tool took is below. Can anyone here understand exactly what could be happening? Thanks! [6/17/2010 5:32:58 PM] First chance exception - 0xe0434f4d caused by thread with system id 1736 [6/17/2010 5:32:58 PM] Stack Trace ChildEBP RetAddr Args to Child WARNING: Stack unwind information not available. Following frames may be wrong. 1c5bec58 79ef2bbc e0434f4d 00000001 00000001 kernel32!RaiseException+0x3c 1c5becb8 79fccf80 0a6d4998 00000000 00000000 mscorwks!GetMetaDataInternalInterface+0x84a9 1c5bed7c 656cab0e 0a6d4788 1c5bed98 65221345 mscorwks!StrongNameErrorInfo+0x103dc 1c5bed88 65221345 0a6cefb0 1c5bedf8 1c5bee08 System_Data_ni+0x57ab0e 1c5bee0c 79e7e1f3 1c147158 1c147158 0a6d0710 System_Data_ni+0xd1345 1c5bee24 79f7c770 0a6d0710 1c147158 026f25a8 mscorwks!DllUnregisterServerInternal+0x21d7 1c5beee8 79e71b4c 0a6cd9b8 0a6cd994 026f409c mscorwks!CorExitProcess+0x28f9a 1c5bef00 79e821b9 1c5befd8 00000002 1c5befa0 mscorwks+0x1b4c 1c5bef80 79e96531 1c5befd8 00000002 1c5befa0 mscorwks!DllUnregisterServerInternal+0x619d 1c5bf0c8 79e96564 1c531688 1c5bf228 1c5bf120 mscorwks!CoUninitializeEE+0x2ead 1c5bf0e4 79e96582 1c531688 1c5bf228 1c5bf120 mscorwks!CoUninitializeEE+0x2ee0 1c5bf0fc 79f87a83 1c5bf120 1c5bf2e0 79fa6a6b mscorwks!CoUninitializeEE+0x2efe 1c5bf2ec 79f87be2 00629d50 0a6cdae8 0a6d0e04 mscorwks!CorExitProcess+0x342ad 1c5bf3ac 792d5348 00629d90 00000086 1c5bf3c8 mscorwks!CorExitProcess+0x3440c 1c5bf3fc 792d50f6 00629d90 00000086 066a1ae0 mscorlib_ni+0x215348 1c5bf434 792d4fde 00000000 00000000 0a6cd944 mscorlib_ni+0x2150f6 1c5bf488 65e1098e 0a6cd944 00000000 00000000 mscorlib_ni+0x214fde 1c5bf4cc 65e10665 66082f99 0a6ca144 00000000 System_Web_Services_ni+0x13098e 1c5bf4fc 65e10ff7 026c1054 0a6ca168 0a6ace9c System_Web_Services_ni+0x130665 1c5bf510 6dde7666 1c5bf54c 660adb16 6ddd2c34 System_Web_Services_ni+0x130ff7 1c5bf518 660adb16 6ddd2c34 0a6ace8c 0a6c883c System_Web_Extensions_ni+0x1c7666 1c5bf54c 6608132c 1c5bf578 0a6c883c 00000000 System_Web_ni+0x18db16 1c5bf588 6608c5c3 1c5bf5b0 0a6abecc 0a6c8b4c System_Web_ni+0x16132c 1c5bf5dc 660808ac 0a6c8218 0a6abecc 026c0d48 System_Web_ni+0x16c5c3 1c5bf5f0 66083e1c 0a6c883c 026c1054 0a6c883c System_Web_ni+0x1608ac 1c5bf62c 66083ac3 026bc67c 0a6c8400 1c5bf6b0 System_Web_ni+0x163e1c 1c5bf63c 66082c5c 8984fdc8 79e7a6b8 1c5bf858 System_Web_ni+0x163ac3 1c5bf6b0 79f9811e 00000002 01b93b00 026cf6e4 System_Web_ni+0x162c5c 1c5bf768 79f9822b 0017a0d0 1c5bf970 1c5bf9e8 mscorwks!CorExitProcess+0x44948 1c5bf7c4 79f98691 0017a0d0 1c5bf970 1c5bf9e8 mscorwks!CorExitProcess+0x44a55 1c5bf9d0 6a2aa19b 00000001 01b93b00 00000000 mscorwks!CorExitProcess+0x44ebb 1c5bf9f0 6a2aa19b 023ad3f0 01b93b00 00000002 webengine!BufferPoolReleaseBuffer+0x1bb 1c5bfa28 79e72032 79e821f6 e5934469 0017a0d0 webengine!BufferPoolReleaseBuffer+0x1bb 00000000 00000000 00000000 00000000 00000000 mscorwks+0x2032 [6/17/2010 5:33:00 PM] First chance exception - 0xe0434f4d caused by thread with system id 3252 [6/17/2010 5:33:00 PM] Stack Trace ChildEBP RetAddr Args to Child WARNING: Stack unwind information not available. Following frames may be wrong. 01d0ecd8 79ef2bbc e0434f4d 00000001 00000001 kernel32!RaiseException+0x3c 01d0ed38 79fccf80 02748edc 00000000 00000000 mscorwks!GetMetaDataInternalInterface+0x84a9 01d0edfc 656cab0e 02748ccc 01d0ee18 65221345 mscorwks!StrongNameErrorInfo+0x103dc 01d0ee08 65221345 027434d0 01d0ee78 01d0ee88 System_Data_ni+0x57ab0e 01d0ee8c 79e7e1f3 1c147158 1c147158 02744c30 System_Data_ni+0xd1345 01d0eea4 79f7c770 02744c30 1c147158 026f25a8 mscorwks!DllUnregisterServerInternal+0x21d7 01d0ef68 79e71b4c 02741ed8 02741eb4 026f409c mscorwks!CorExitProcess+0x28f9a 01d0ef80 79e821b9 01d0f058 00000002 01d0f020 mscorwks+0x1b4c 01d0f000 79e96531 01d0f058 00000002 01d0f020 mscorwks!DllUnregisterServerInternal+0x619d 01d0f148 79e96564 1c531688 01d0f2a8 01d0f1a0 mscorwks!CoUninitializeEE+0x2ead 01d0f164 79e96582 1c531688 01d0f2a8 01d0f1a0 mscorwks!CoUninitializeEE+0x2ee0 01d0f17c 79f87a83 01d0f1a0 01d0f360 79fa6a6b mscorwks!CoUninitializeEE+0x2efe 01d0f36c 79f87be2 00629d50 02742008 02745324 mscorwks!CorExitProcess+0x342ad 01d0f42c 792d5348 00629d90 00000086 01d0f448 mscorwks!CorExitProcess+0x3440c 01d0f47c 792d50f6 00629d90 00000086 066a1ae0 mscorlib_ni+0x215348 01d0f4b4 792d4fde 00000000 00000000 02741e64 mscorlib_ni+0x2150f6 01d0f508 65e1098e 02741e64 00000000 00000000 mscorlib_ni+0x214fde 01d0f54c 65e10665 66082f99 0273e664 00000000 System_Web_Services_ni+0x13098e 01d0f57c 65e10ff7 026c1054 0273e688 0a6ace9c System_Web_Services_ni+0x130665 01d0f590 6dde7666 01d0f5cc 660adb16 6ddd2c34 System_Web_Services_ni+0x130ff7 01d0f598 660adb16 6ddd2c34 0a6ace8c 0272cce4 System_Web_Extensions_ni+0x1c7666 01d0f5cc 6608132c 01d0f5f8 0272cce4 00000000 System_Web_ni+0x18db16 01d0f608 6608c5c3 01d0f630 0a6abecc 0272cff4 System_Web_ni+0x16132c 01d0f65c 660808ac 0272c6c0 0a6abecc 026c0d48 System_Web_ni+0x16c5c3 01d0f670 66083e1c 0272cce4 026c1054 0272cce4 System_Web_ni+0x1608ac 01d0f6ac 66083ac3 026bc67c 0272c8a8 01d0f730 System_Web_ni+0x163e1c 01d0f6bc 66082c5c 8984fdc8 79e7a6b8 01d0f8d8 System_Web_ni+0x163ac3 01d0f730 79f9811e 00000002 01b93b00 026cf6e4 System_Web_ni+0x162c5c 01d0f7e8 79f9822b 000dcea8 01d0f9f0 01d0fa68 mscorwks!CorExitProcess+0x44948 01d0f844 79f98691 000dcea8 01d0f9f0 01d0fa68 mscorwks!CorExitProcess+0x44a55 01d0fa50 6a2aa19b 00000001 01b93b00 00000000 mscorwks!CorExitProcess+0x44ebb 01d0fa70 6a2aa19b 023ad3f0 01b93b00 00000002 webengine!BufferPoolReleaseBuffer+0x1bb 01d0fac8 79e79cba 79e79ccd 0000000d 00000000 webengine!BufferPoolReleaseBuffer+0x1bb 01d0facc 79e79ccd 0000000d 00000000 79ec3f4b mscorwks+0x9cba 01d0fad8 79ec3f4b 79e7c82c 79ec3f53 f818458d mscorwks+0x9ccd 00000000 00000000 00000000 00000000 00000000 mscorwks!CreateAssemblyNameObject+0x22f40 [6/17/2010 5:33:37 PM] Thread exited. Exiting thread system id - 2144. Exit code - 0x00000000

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  • algorithm q: Fuzzy matching of structured data

    - by user86432
    I have a fairly small corpus of structured records sitting in a database. Given a tiny fraction of the information contained in a single record, submitted via a web form (so structured in the same way as the table schema), (let us call it the test record) I need to quickly draw up a list of the records that are the most likely matches for the test record, as well as provide a confidence estimate of how closely the search terms match a record. The primary purpose of this search is to discover whether someone is attempting to input a record that is duplicate to one in the corpus. There is a reasonable chance that the test record will be a dupe, and a reasonable chance the test record will not be a dupe. The records are about 12000 bytes wide and the total count of records is about 150,000. There are 110 columns in the table schema and 95% of searches will be on the top 5% most commonly searched columns. The data is stuff like names, addresses, telephone numbers, and other industry specific numbers. In both the corpus and the test record it is entered by hand and is semistructured within an individual field. You might at first blush say "weight the columns by hand and match word tokens within them", but it's not so easy. I thought so too: if I get a telephone number I thought that would indicate a perfect match. The problem is that there isn't a single field in the form whose token frequency does not vary by orders of magnitude. A telephone number might appear 100 times in the corpus or 1 time in the corpus. The same goes for any other field. This makes weighting at the field level impractical. I need a more fine-grained approach to get decent matching. My initial plan was to create a hash of hashes, top level being the fieldname. Then I would select all of the information from the corpus for a given field, attempt to clean up the data contained in it, and tokenize the sanitized data, hashing the tokens at the second level, with the tokens as keys and frequency as value. I would use the frequency count as a weight: the higher the frequency of a token in the reference corpus, the less weight I attach to that token if it is found in the test record. My first question is for the statisticians in the room: how would I use the frequency as a weight? Is there a precise mathematical relationship between n, the number of records, f(t), the frequency with which a token t appeared in the corpus, the probability o that a record is an original and not a duplicate, and the probability p that the test record is really a record x given the test and x contain the same t in the same field? How about the relationship for multiple token matches across multiple fields? Since I sincerely doubt that there is, is there anything that gets me close but is better than a completely arbitrary hack full of magic factors? Barring that, has anyone got a way to do this? I'm especially keen on other suggestions that do not involve maintaining another table in the database, such as a token frequency lookup table :). This is my first post on StackOverflow, thanks in advance for any replies you may see fit to give.

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  • What language/framework (technology) to use for website (flash games portal)

    - by cripox
    Hello, I know there are a lot of similar questions on the net, but because I am a newbie in web development I didn't find the solution for my specific problem. I am planing on creating a flash games portal from scratch. It is a big chance that there will be big traffic from the beginning (millions of pageviews). I want to reduce the server costs as much as possible but in the same time to not be tide to an expensive contract as there is a chance that the project will not be as successfully as I want and in that case the money would be very little. The question is : what technology to use? I don't know any web dev technology yet so it doesn't matter what I will learn. My web dev experience is a little php 8 years ago, and from then I programmed in C++ / Java- game and mobile development. I like Java and C syntax and language very much and I tend to dislike dynamic typing or non robust scripting (like php)- but I can get along if these are the best choices. The candidates are now: - Grails (my best for now) Ruby on Rails Cake PHP Other technologies (Google App Engine, Python/Django etc...) I was considering at first using pure C and compiling the web app in the server- just to squeeze more from the servers, but soon I understand that this is overkill. Next my eyes came on Ruby - as there is a lot of buzz for it's easiness of use. Next I discovered Grails and looked at Java because it is said that it is "faster". But I don't know what this "Faster" really means on my needs, so here comes the first question: 1) What will be my biggest consumption on the server, other than bandwidth, for a lot of flash content requests? Is it memory? I heard that Java needs a lot of memory, but is faster. Is it CPU? I am planning to take some daily VPS.NET nodes at first, to see if there is a demand, and if the "spike" is permanent to move to a dedicated server (serverloft.com has some good offers), else to remain with less nodes. I was also considering developing in Google App Engine- cheap or free hosting to use at first - so I can test my assumption- and also very easy to use (no need for sys administration) but the costs became high if used more ( 3 million games played / month .. x mb/ each). And the issue with Google is that it looks me in this technology. My other concern is scalability (not only for traffic/users, but as adding functionality) My plans are to release a functional site in just 4 weeks (just the basics frontend and some quick basic backend - so I can be able to modify some things and add games manually) - but then to raise it and add more things to it. I am planning to take a little different approach than other portals so I need to write it from scratch (a script will not do). 2) Will Grails take much more resources than RoR or Php server wise? I heard that making it on Java stack will be hardware expensive and is overkill if you don't make a bank application. My application will not be very complex (I hope and i will try to) but will have a lot of traffic. I also took in account using CDN for files, but the cheapest CDN found was 5c/GB (vps.net) and the cost per gb on serverloft (http://www.serverloft.com/dedizierte-server/server-details.php?products=4) is only 1.79 cents/GB and comes with the other resources either. I am new to this domain (web). I am learning the ropes and searching on the web for ~half of year but don't have any really practical experience, so I know that I must have some naive thinking and other issues that i don't know from now, so please give me any advice you want regarding anything, not just the specific questions asked. And thank you so much for such great community!

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  • OTN Developer Days - Calgary, Alberta March 18 & Atlanta, GA April 1

    - by dana.singleterry
    Discover a Faster Way to Develop Ajax -Enabled Application Based on Java and SOA Standards Get Hands-on with Oracle Jdeveloper, Oracle Application Developer Framework and Oracle Fusion Middleware 11g. You are invited to attend Oracle Technology Network (OTN) Developer Day, a free, hands-on workshop that will give you insight into how to create Ajax-enabled rich Web user interfaces and Java EE-based SOA services with ease. We'll introduce you to the development platform Oracle is using for its Fusion enterprise applications, and show you how to get up to speed with it. The workshop will get you started developing with the latest versions of Oracle JDeveloper and Oracle ADF 11g, including the Ajax-enabled ADF Faces rich client components. Thursday, March 18, 2010 8:00 a.m. - 5:00 p.m. Calgary Marriott hotel 110 9th Avenue, SE Calgary, Alberta T2G 5A6 Wednesday, April 1, 2010 8:00 a.m. - 5:00 p.m. Four Seasons Hotel Atlanta 75 Fourteenth Street Atlanta, Georgia 30309 This workshop is designed for developers, project managers, and architects. Whether you are currently using Java, traditional 4GL tools like Oracle Forms, PeopleTools, and Visual Basic, or just looking for a better development platform - this session is for you. Get explanation from Oracle experts, try your hands at actual development, and get a chance to win an Apple iPod Touch and Oracle prizes. Come see how Oracle can help you deliver cutting edge UIs and standard -based applications faster with the Oracle Fusion Development software stack. At this event you will: * Get to know the Oracle Fusion development architecture and strategy from Oracle's experts. * Learn the easy way to extend your existing development skill sets to incorporate new technologies and architectures that include Service-Oriented Architecture, Java EE, and Web 2.0 * Participate in hands-on labs and experience new technologies in a familiar and productive development environment with Oracle experts guidance. Click on the Register Now Calgary, Alberta to register for the Calgary event and click on the Register Now Atlanta, GA to register for the Atlanta FREE events. Don't miss your exclusive opportunity to network with your peers and discuss today's most vital application development topics with Oracle experts.

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  • SQLAuthority News – Spot the SQLAuthority Baby Contest – SQL Server Cheat Sheet

    - by pinaldave
    Last Year during the TechEd India 2009 SQL Server Cheat Sheets were instant hit. Yesterday when I announce that I am going to attend TechED India 2010 at Bangalore, I received many requests for the same. I have only 30 copies available at this moment.  I will print more copies of the same after this event. For the moment I am going to run quick content to win SQL Server Cheat Sheet during this event. The contest is very simple. My 7 months old daughter will join me in this trip. She will be staying with me in the same hotel where the event is organized. Here is the detail for contest: Contest: If you Spot SQLAuthority Baby, get one SQL Server Cheat Sheet. Rules: Every hour the first person to spot SQLAuthority Baby will get 1 SQL Server Cheat Sheet. If you spot her and the hourly SQL Server Cheat Sheet is given away, you still have chance to get a copy. Drop your business card or email address and we will contact you for your copy. SQLAuthority Baby is very easy to spot. Shaivi Dave If you are not attending this event and want copy, you can easily download the same from link below. Download SQL Server Cheat Sheet from here. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: MVP, Pinal Dave, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, SQLAuthority News, T SQL, Technology Tagged: SQL Cheat Sheet, TechEd, TechEdIn

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  • Mauritius Software Craftsmanship Community

    There we go! I finally managed to push myself forward and pick up an old, actually too old, idea since I ever arrived here in Mauritius more than six years ago. I'm talking about a community for all kind of ICT connected people. In the past (back in Germany), I used to be involved in various community activities. For example, I was part of the Microsoft Community Leader/Influencer Program (CLIP) in Germany due to an FAQ on Visual FoxPro, actually Active FoxPro Pages (AFP) to be more precise. Then in 2003/2004 I addressed the responsible person of the dFPUG user group in Speyer in order to assist him in organising monthly user group meetings. Well, he handed over management completely, and attended our meetings regularly. Why did it take you so long? Well, I don't want to bother you with the details but short version is that I was too busy on either job (building up new companies) or private life (got married and we have two lovely children, eh 'monsters') or even both. But now is the time where I was starting to look for new fields given the fact that I gained some spare time. My businesses are up and running, the kids are in school, and I am finally in a position where I can commit myself again to community activities. And I love to do that! Why a new user group? Good question... And 'easy' to answer. Since back in 2007 I did my usual research, eh Google searches, to see whether there existing user groups in Mauritius and in which field of interest. And yes, there are! If I recall this correctly, then there are communities for PHP, Drupal, Python (just recently), Oracle, and Linux (which used to be even two). But... either they do not exist anymore, they are dormant, or there is only a low heart-beat, frankly speaking. And yes, I went to meetings of the Linux User Group Meta (Mauritius) back in 2010/2011 and just recently. I really like the setup and the way the LUGM is organised. It's just that I have a slightly different point of view on how a user group or community should organise itself and how to approach future members. Don't get me wrong, I'm not criticizing others doing a very good job, I'm only saying that I'd like to do it differently. The last meeting of the LUGM was awesome; read my feedback about it. Ok, so what's up with 'Mauritius Software Craftsmanship Community' or short: MSCC? As I've already written in my article on 'Communities - The importance of exchange and discussion' I think it is essential in a world of IT to stay 'connected' with a good number of other people in the same field. There is so much dynamic and every day's news that it is almost impossible to keep on track with all of them. The MSCC is going to provide a common platform to exchange experience and share knowledge between each other. You might be a newbie and want to know what to expect working as a software developer, or as a database administrator, or maybe as an IT systems administrator, or you're an experienced geek that loves to share your ideas or solutions that you implemented to solve a specific problem, or you're the business (or HR) guy that is looking for 'fresh' blood to enforce your existing team. Or... you're just interested and you'd like to communicate with like-minded people. Meetup of 26.06.2013 @ L'arabica: Of course there are laptops around. Free WiFi, power outlet, coffee, code and Linux in one go. The MSCC is technology-agnostic and spans an umbrella over any kind of technology. Simply because you can't ignore other technologies anymore in a connected IT world as we have. A front-end developer for iOS applications should have the chance to connect with a Python back-end coder and eventually with a DBA for MySQL or PostgreSQL and exchange their experience. Furthermore, I'm a huge fan of cross-platform development, and it is very pleasant to have pure Web developers - with all that HTML5, CSS3, JavaScript and JS libraries stuff - and passionate C# or Java coders at the same table. This diversity of knowledge can assist and boost your personal situation. And last but not least, there are projects and open positions 'flying' around... People might like to hear others opinion about an employer or get new impulses on how to tackle down an issue at their workspace, etc. This is about community. And that's how I see the MSCC in general - free of any limitations be it by programming language or technology. Having the chance to exchange experience and to discuss certain aspects of technology saves you time and money, and it's a pleasure to enjoy. Compared to dusty books and remote online resources. It's human! Organising meetups (meetings, get-together, gatherings - you name it!) As of writing this article, the MSCC is currently meeting every Wednesday for the weekly 'Code & Coffee' session at various locations (suggestions are welcome!) in Mauritius. This might change in the future eventually but especially at the beginning I think it is very important to create awareness in the Mauritian IT world. Yes, we are here! Come and join us! ;-) The MSCC's main online presence is located at Meetup.com because it allows me to handle the organisation of events and meeting appointments very easily, and any member can have a look who else is involved so that an exchange of contacts is given at any time. In combination with the other entities (G+ Communities, FB Pages or in Groups) I advertise and manage all future activities here: Mauritius Software Craftsmanship Community This is a community for those who care and are proud of what they do. For those developers, regardless how experienced they are, who want to improve and master their craft. This is a community for those who believe that being average is just not good enough. I know, there are not many 'craftsmen' yet but it's a start... Let's see how it looks like by the end of the year. There are free smartphone apps for Android and iOS from Meetup.com that allow you to keep track of meetings and to stay informed on latest updates. And last but not least, there is a Trello workspace to collect and share ideas and provide downloads of slides, etc. Trello is also available as free smartphone app. Sharing is caring! As mentioned, the #MSCC is present in various social media networks in order to cover as many people as possible here in Mauritius. Following is an overview of the current networks: Twitter - Latest updates and quickies Google+ - Community channel Facebook - Community Page LinkedIn - Community Group Trello - Collaboration workspace to share and develop ideas Hopefully, this covers the majority of computer-related people in Mauritius. Please spread the word about the #MSCC between your colleagues, your friends and other interested 'geeks'. Your future looks bright Running and participating in a user group or any kind of community usually provides quite a number of advantages for anyone. On the one side it is very joyful for me to organise appointments and get in touch with people that might be interested to present a little demo of their projects or their recent problems they had to tackle down, and on the other side there are lots of companies that have various support programs or sponsorships especially tailored for user groups. At the moment, I already have a couple of gimmicks that I would like to hand out in small contests or raffles during one of the upcoming meetings, and as said, companies provide all kind of goodies, books free of charge, or sometimes even licenses for communities. Meeting other software developers or IT guys also opens up your point of view on the local market and there might be interesting projects or job offers available, too. A community like the Mauritius Software Craftsmanship Community is great for freelancers, self-employed, students and of course employees. Meetings will be organised on a regular basis, and I'm open to all kind of suggestions from you. Please leave a comment here in blog or join the conversations in the above mentioned social networks. Let's get this community up and running, my fellow Mauritians! Recent updates The MSCC is now officially participating in the O'Reilly UK User Group programm and we are allowed to request review or recension copies of recent titles. Additionally, we have a discount code for any books or ebooks that you might like to order on shop.oreilly.com. More applications for user group sponsorship programms are pending and I'm looking forward to a couple of announcement very soon. And... we need some kind of 'corporate identity' - Over at the MSCC website there is a call for action (or better said a contest with prizes) to create a unique design for the MSCC. This would include a decent colour palette, a logo, graphical banners for Meetup, Google+, Facebook, LinkedIn, etc. and of course badges for our craftsmen to add to their personal blogs and websites. Please spread the word and contribute. Thanks!

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  • ATG Live Webcast Event - EBS 12 OAF Rich UI Enhancements

    - by Bill Sawyer
    The E-Business Suite Applications Technology Group (ATG) participates in several conferences a year, including Oracle OpenWorld in San Francisco and OAUG/Collaborate.   We announce new releases, roadmaps, updates, and other news at these events.  These events are exciting, drawing thousands of attendees, but it's clear that only a fraction of our EBS users are able to participate. We touch upon many of the same announcements here on this blog, but a blog article is necessarily different than an hour-long conference session.  We're very interested in offering more in-depth technical content and the chance to interact directly with senior ATG Development staff.  New ATG Live Webcast series -- free of charge As part of that initiative, I'm very pleased to announce that we're launching a new series of free ATG Live Webcasts jointly with Oracle University.  Our goal is to provide solid, authoritative coverage of some of the latest ATG technologies, broadcasting live from our development labs to you. Our first event is titled: The Latest E-Business Suite R12.x OA Framework Rich User Interface Enhancements This live one-hour webcast will offer a comprehensive review of the latest user interface enhancements and updates to OA Framework in EBS 12. Developers will get a detailed look at new features designed to enhance usability, offer more capabilities for personalization and extensions, and support the development and use of dashboards and web services. Topics will include new rich user interface (UI) capabilities such as: 

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  • Social Network Stalking

    - by David Dorf
    Think about this: By reading this blog, you and I are connected. We have this blog and its topics in common, so there's a chance we have other things in common as well. In any relationship there is a degree of trust and influence. If you trust me, at least in terms of particular subjects, then I have some influence over you. If I buy an iPad, then there's an opportunity for me to influence your possible purchase of an over-hyped tablet that you don't really need. So what could a retailer do with this? Retailers that have fans and followers should assume that the friends of those fans and followers are more susceptible to their marketing efforts. If I'm a fan of Apple, then Apple will be more successful marketing to my friends than marketing to random people. Intuitively that makes sense, at least to me. Companies like 33Across and Pursway are already putting this theory into practice, and achieving some interesting results. Jeff Jarvis, who by-the-way is speaking at CrossTalk this year, has been discussing the power of influencers in social networks. In his blog he rails against marketers and says "messages and influence aren't the future of marketing; conversations and relationships are." Valuable messages will be passed on because they are valuable, not because someone has the power to exert influence. True enough, but that won't stop the efforts underway to leverage social networks for more targeted advertising. From a business perspective, this sounds like a goldmine to me; on a personal level, it's a bit creepy.

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  • Transactional Messaging in the Windows Azure Service Bus

    - by Alan Smith
    Introduction I’m currently working on broadening the content in the Windows Azure Service Bus Developer Guide. One of the features I have been looking at over the past week is the support for transactional messaging. When using the direct programming model and the WCF interface some, but not all, messaging operations can participate in transactions. This allows developers to improve the reliability of messaging systems. There are some limitations in the transactional model, transactions can only include one top level messaging entity (such as a queue or topic, subscriptions are no top level entities), and transactions cannot include other systems, such as databases. As the transaction model is currently not well documented I have had to figure out how things work through experimentation, with some help from the development team to confirm any questions I had. Hopefully I’ve got the content mostly correct, I will update the content in the e-book if I find any errors or improvements that can be made (any feedback would be very welcome). I’ve not had a chance to look into the code for transactions and asynchronous operations, maybe that would make a nice challenge lab for my Windows Azure Service Bus course. Transactional Messaging Messaging entities in the Windows Azure Service Bus provide support for participation in transactions. This allows developers to perform several messaging operations within a transactional scope, and ensure that all the actions are committed or, if there is a failure, none of the actions are committed. There are a number of scenarios where the use of transactions can increase the reliability of messaging systems. Using TransactionScope In .NET the TransactionScope class can be used to perform a series of actions in a transaction. The using declaration is typically used de define the scope of the transaction. Any transactional operations that are contained within the scope can be committed by calling the Complete method. If the Complete method is not called, any transactional methods in the scope will not commit.   // Create a transactional scope. using (TransactionScope scope = new TransactionScope()) {     // Do something.       // Do something else.       // Commit the transaction.     scope.Complete(); }     In order for methods to participate in the transaction, they must provide support for transactional operations. Database and message queue operations typically provide support for transactions. Transactions in Brokered Messaging Transaction support in Service Bus Brokered Messaging allows message operations to be performed within a transactional scope; however there are some limitations around what operations can be performed within the transaction. In the current release, only one top level messaging entity, such as a queue or topic can participate in a transaction, and the transaction cannot include any other transaction resource managers, making transactions spanning a messaging entity and a database not possible. When sending messages, the send operations can participate in a transaction allowing multiple messages to be sent within a transactional scope. This allows for “all or nothing” delivery of a series of messages to a single queue or topic. When receiving messages, messages that are received in the peek-lock receive mode can be completed, deadlettered or deferred within a transactional scope. In the current release the Abandon method will not participate in a transaction. The same restrictions of only one top level messaging entity applies here, so the Complete method can be called transitionally on messages received from the same queue, or messages received from one or more subscriptions in the same topic. Sending Multiple Messages in a Transaction A transactional scope can be used to send multiple messages to a queue or topic. This will ensure that all the messages will be enqueued or, if the transaction fails to commit, no messages will be enqueued.     An example of the code used to send 10 messages to a queue as a single transaction from a console application is shown below.   QueueClient queueClient = messagingFactory.CreateQueueClient(Queue1);   Console.Write("Sending");   // Create a transaction scope. using (TransactionScope scope = new TransactionScope()) {     for (int i = 0; i < 10; i++)     {         // Send a message         BrokeredMessage msg = new BrokeredMessage("Message: " + i);         queueClient.Send(msg);         Console.Write(".");     }     Console.WriteLine("Done!");     Console.WriteLine();       // Should we commit the transaction?     Console.WriteLine("Commit send 10 messages? (yes or no)");     string reply = Console.ReadLine();     if (reply.ToLower().Equals("yes"))     {         // Commit the transaction.         scope.Complete();     } } Console.WriteLine(); messagingFactory.Close();     The transaction scope is used to wrap the sending of 10 messages. Once the messages have been sent the user has the option to either commit the transaction or abandon the transaction. If the user enters “yes”, the Complete method is called on the scope, which will commit the transaction and result in the messages being enqueued. If the user enters anything other than “yes”, the transaction will not commit, and the messages will not be enqueued. Receiving Multiple Messages in a Transaction The receiving of multiple messages is another scenario where the use of transactions can improve reliability. When receiving a group of messages that are related together, maybe in the same message session, it is possible to receive the messages in the peek-lock receive mode, and then complete, defer, or deadletter the messages in one transaction. (In the current version of Service Bus, abandon is not transactional.)   The following code shows how this can be achieved. using (TransactionScope scope = new TransactionScope()) {       while (true)     {         // Receive a message.         BrokeredMessage msg = q1Client.Receive(TimeSpan.FromSeconds(1));         if (msg != null)         {             // Wrote message body and complete message.             string text = msg.GetBody<string>();             Console.WriteLine("Received: " + text);             msg.Complete();         }         else         {             break;         }     }     Console.WriteLine();       // Should we commit?     Console.WriteLine("Commit receive? (yes or no)");     string reply = Console.ReadLine();     if (reply.ToLower().Equals("yes"))     {         // Commit the transaction.         scope.Complete();     }     Console.WriteLine(); }     Note that if there are a large number of messages to be received, there will be a chance that the transaction may time out before it can be committed. It is possible to specify a longer timeout when the transaction is created, but It may be better to receive and commit smaller amounts of messages within the transaction. It is also possible to complete, defer, or deadletter messages received from more than one subscription, as long as all the subscriptions are contained in the same topic. As subscriptions are not top level messaging entities this scenarios will work. The following code shows how this can be achieved. try {     using (TransactionScope scope = new TransactionScope())     {         // Receive one message from each subscription.         BrokeredMessage msg1 = subscriptionClient1.Receive();         BrokeredMessage msg2 = subscriptionClient2.Receive();           // Complete the message receives.         msg1.Complete();         msg2.Complete();           Console.WriteLine("Msg1: " + msg1.GetBody<string>());         Console.WriteLine("Msg2: " + msg2.GetBody<string>());           // Commit the transaction.         scope.Complete();     } } catch (Exception ex) {     Console.WriteLine(ex.Message); }     Unsupported Scenarios The restriction of only one top level messaging entity being able to participate in a transaction makes some useful scenarios unsupported. As the Windows Azure Service Bus is under continuous development and new releases are expected to be frequent it is possible that this restriction may not be present in future releases. The first is the scenario where messages are to be routed to two different systems. The following code attempts to do this.   try {     // Create a transaction scope.     using (TransactionScope scope = new TransactionScope())     {         BrokeredMessage msg1 = new BrokeredMessage("Message1");         BrokeredMessage msg2 = new BrokeredMessage("Message2");           // Send a message to Queue1         Console.WriteLine("Sending Message1");         queue1Client.Send(msg1);           // Send a message to Queue2         Console.WriteLine("Sending Message2");         queue2Client.Send(msg2);           // Commit the transaction.         Console.WriteLine("Committing transaction...");         scope.Complete();     } } catch (Exception ex) {     Console.WriteLine(ex.Message); }     The results of running the code are shown below. When attempting to send a message to the second queue the following exception is thrown: No active Transaction was found for ID '35ad2495-ee8a-4956-bbad-eb4fedf4a96e:1'. The Transaction may have timed out or attempted to span multiple top-level entities such as Queue or Topic. The server Transaction timeout is: 00:01:00..TrackingId:947b8c4b-7754-4044-b91b-4a959c3f9192_3_3,TimeStamp:3/29/2012 7:47:32 AM.   Another scenario where transactional support could be useful is when forwarding messages from one queue to another queue. This would also involve more than one top level messaging entity, and is therefore not supported.   Another scenario that developers may wish to implement is performing transactions across messaging entities and other transactional systems, such as an on-premise database. In the current release this is not supported.   Workarounds for Unsupported Scenarios There are some techniques that developers can use to work around the one top level entity limitation of transactions. When sending two messages to two systems, topics and subscriptions can be used. If the same message is to be sent to two destinations then the subscriptions would have the default subscriptions, and the client would only send one message. If two different messages are to be sent, then filters on the subscriptions can route the messages to the appropriate destination. The client can then send the two messages to the topic in the same transaction.   In scenarios where a message needs to be received and then forwarded to another system within the same transaction topics and subscriptions can also be used. A message can be received from a subscription, and then sent to a topic within the same transaction. As a topic is a top level messaging entity, and a subscription is not, this scenario will work.

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