Run a single instance of jar

It is possible to run multiple instances of a jar executable. Is it possible that only a single instance of the jar runs? If I use a exe wrapper like JSmooth or Launch4J, the exe can be made to run as a single instance. But since there are no such wrappers for linux, I need a way to restrict the jar to a single instance.

I'm not coder, sure maybe I missed lots of ..., but with ZOO what I tried, I'm (still) more satisfied with the combination Db (aplications tier) plus SingleInstanceController (GUI response), one for them (on program crashes) always d.i.e.d.
heavens I have got (I think that) your example from OldGoodSunForum about that (classes RunOnceUserSocket + Interlock)
Edit:
++ someone once wrote a book about ...
Edited by: mKorbel on 20.4.2011 0:55

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Siebel Instance Strategy – Single Instance or Multiple Instances – Advantag

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4joey1 wrote:
Some of peers state that RAC mostly a High Availability solution to enable continuity should one instance fail.I would like to know if db performance would improve on RAC as load balancing between 2 or more instances occurs in a RAC setup.RAC also provides scalability - as you have additional servers and database instances to deal with the workload. It is not a mere high availability and redundancy architecture.
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How to specify a single instance app?

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Have you tried setting LSMultipleInstancesProhibited in Info.plist? This key is usually used to prevent the app from launching in another user's session, but I think it also prevents multiple instances in the same session.
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I try to follow the steps 1-3, as it shows. After it downloads, after step 2, a dialog box pops up saying “Open Executable File? Then it says it may contain viruses or malicious code and to be careful when opening file. So I click OK, then step 3 occurs, file name lists as: install_flashplayer11x32_mssd_aih(2).exe. So then I hit “Run”. Then another dialog box pops up titling “UI_FlashPlayerInstaller”, and it says “Only a single instance of this application can run”, “OK”. I’ve checked to see if there is another version installed, but I don’t see any. I am operating a Windows 32 Bit, FireFox,

Download the full installer from this FAQ http://forums.adobe.com/thread/909550
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Why I can't install adobe keep getting: "only a single instance of this application can run"?

Hello, Can someone help me with Adobe Flash Player installation ?
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I have opened the task manager and try to end the processes related to Adobe manually by selecting 'End Process' and then try to install it, but nothing happened.
I've tried 'clean boot' but neither worked.I downloaded the 'Adobe unistaller' from the official page and the 'latest version of flash player' but it doesn't work!.
I've also went on the Adobe website and it said this error message was due to the flash application but I deleted all of those files to and still nothing.
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If you haven't done so already, reboot your computer, then re-run the installer you downloaded.

Not able to install Adobe 17x32.Getting message only a single instance of this application can run

Sir,I can't install Adobe 17X32.I have Win 7 system.All previous versions have been uninstalled and yet I am getting a message--ONLY A SINGLE INSTANCE OF THIS APPLICATION CAN RUN.How do I remedy the situation?
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Message was edited by: Maria Vargas
Removed personal email address, which should not be included in a public forum.

Hi Viraj,
Please try the offline installer posted at the bottom of the Installation problems | Flash Player | Windows page, in the 'Still having problems' section.
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The download link has moved since then: http://fpdownload.macromedia.com/pub/flashplayer/latest/help/install_flash_player.exe

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I had to uninstall Adobe Reader some months back and ever since have been unable to reinstall. I get through the first couple download steps, and click yes to "allow the following program to make changes to this computer", but then it all closes down and sometimes I get the "Only a single instance of this application can run" box pop up. I googled that error message and have spent hours trying every tip on how to resolve it on various message boards but nothing works and I really need to be able to open pdfs again. Thanks for any help you can provide.

If you are in Windows (which we don't know), you can try using this tool to first remove all traces of Reader from your computer:
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Then, you can download the full offline Reader installer from
http://get.adobe.com/reader/enterprise/
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"Only a single instance of this application can run" Have you seen this yet?

Hi -
Please excuse a newbie's ignorance - I've never posted to any forums before :-)
I am using Win7 Professional and IE9 on a well-spec'd HP PC (4GM Ram, dual core, lost of hard disk space etc).
I have successfully downloaded Adobe Reader (install_reader 10....exe @ 703kb) using Win7.
I cannot run this file (I have tried all I talk about here with Reader 9 and with Firefox; all the same errors noted below get repeated)
The error message is headed: "UI_ReaderInstaller" and the text in the message is "Only a single instance of thsi application can run"
The only option given is an "OK" button and leaves one having achieved nothing!
I have never had a previous version of Adobe reader on this PC; this is a first time install attempt.
If I search my PC for "UI_ReaderInstaller" it does not give any results!
Please might someone more competent that I help me out here? Maybe you've experienced this and found the solution? Please might you share your knowledge with me?
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Hi Ankit
Thanks for taking the troubel to reply. Sorry if I didn't give full information (I thought I had!)
I have successfully doenloaded the intsaller to my PC (see last post and "PScreen 1" enclosed
When I try to run it I get the error described in my last post (see "PScreen 2" enclosed).
I really need your help so thanks again
Highland D

I get this error message: only a single instance of this application can run

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Adobe Reader | Edit | Preferences | Security (Advanced)
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Chose Preferences from the Edit menu
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Hello,
What error, if any, is being displayed when you attempt to install Flash Player?
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Single instance app with native packaging

Is there any way to allow only one instance of the app to run with javafx2 native packaging? Like an attribute in the build.xml or something?
I'm using the .exe for windows and the .dmg for mac.
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There is no simple deployment build switch that I know of for achieving a single instance app.
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Perhaps you could use the SingleInstanceService:
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http://docs.oracle.com/javase/7/docs/technotes/guides/javaws/developersguide/examples.html#SingleInstanceService "SingleInstanceService"
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You could write out a lock file when the app starts.
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On windows you could read and write the lock value value from the registry.
To get rid of the OS specific stuff surrounding this, perhaps this kind of lock logic could be implemented using the Java Preferences API:
http://docs.oracle.com/javase/7/docs/technotes/guides/preferences/index.html
Intellij Idea is open source and and seems to have this kind of functionality, so you could check how they do it.

Run a single instance of jar

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