🚀 go-pugleaf

Nathan Kirkham wrote:
> 
> We have designed a swish updating system that contacts our server and
> tests the clients machines jars to see if they are the latest versions.
> If they are not it downloads the latest versions.
> The problem is that the application classpath includes these jars
> (though we don't use them for the update bit).  JRE keeps a lock on the
> jars so we can't copy the new files on top.
> 
> Has anyone got a clue how to do this without having another application
> that just does the update.  Running it instead of the normal application
> would be confusing for our users.
> 
> Thanks
> 
> Nathan
> 
> --
> 
> ------------------------------------------
> Nathan Kirkham - nathan@result2k.u-net.com
> Java Programmer
> Result 2000 Plc http://www.result.co.uk

Hello Nathan,

 	Hmmm...Well I'm not sure how you'd get access to those jar files
directly, and since you don't want to have your user run another app,
maybe the jre would let them go if when you find out that there are new
jar files to download, it goes ahead and downloads them into an 'update'
directory, putting out a message like,"There are new and improved jar
files, but they won't be active until you restart the application," Then 
when the application exits, you can have it launch the other app, which
would then wait an appropriate ammount of time before it copied the
updated jar files from the 'update' directory to the directory they
belong in.  

   Now granted, that is anything but an elegant solution to this
problem, but it was one of the first things that popped into my head
<grin>

Anyone else got any ideas?
-Clint Brewer