[izpack-devel] Single Installer Instance

[Bartz, Klaus]

Hi,
first, on Windows IzPack is able to detect a allready installed product.
See CheckedHelloPanel. But you mean the detection of just running more
than one installer, I think. On a system where we can use a thing like
the registry it is simple.
On Windows you can search for a regkey which was created under HKCU in
the constructor of the calling panel, Little bit difficult to guarantee
removing, but not the biggest problem.
Other Applications as Eclipse or MSI can store a "semaphore"-file in its
own path area. IzPack has no own subtree.
May be we can use a common existent path to create a "semaphore"-file,
but this will be difficult. Until now it is not in the IzPack core.
 
Cheers
 
Klaus

	-----Original Message-----
	From: izpack-devel-bounces at lists.berlios.de
[mailto:izpack-devel-bounces at lists.berlios.de] On Behalf Of Jeff Gordon
	Sent: Wednesday, January 30, 2008 12:28 AM
	To: izpack-devel at lists.berlios.de
	Subject: Re: [izpack-devel] Single Installer Instance
	
	
	I haven't done this with Java.  I know Eclipse and some other
applications do this, but was wondering if there was an easy way to
implement it.  My experience has been that each Java application blindly
launches in a new JVM with no way to check in an OS neutral way whether
an instance of the same application is already running.
	
	
	On Jan 28, 2008 11:11 PM, Julien Ponge <julien.ponge at gmail.com>
wrote:
	

		> Sorry for not searching old message on this, but I've
got an immediate
		> request to make each installer not allow a second
instance to start (such as
		> an impatient user on a slow machine trying to start
the installer again).
		> Has any work ever been done on this?  Seems like good
default behavior to
		> me.
		
		
		Good idea, just make sure it checks on the installation
instance and
		not just "another IzPack is launched".
		
		Cheers
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