Re: [Proxool-developer] Bug 673073

[Martin C. <mus...@us...>]

On Tue, 2003-02-04 at 10:36, Bas Cancrinus wrote:
> Bill Horsman wrote:
> > We have not found any robust way of determining when the application has
> > ended.  Any suggestions are welcome. 
> 
> Runtime.addShutdownHook() is the key (JRE 1.3+). Shutdown hooks are 
> always executed by the VM, no matter how it exits. The only drawback is 
> an extra permission when the app is forked:
> 
> permission java.lang.RuntimePermission "shutdownHooks";
> 
> According to the discussions at the JDC it is never guaranteed that the 
> VM executes finalize(), whereas it is for shutdown hooks - I confirm 
> this by my own practice.

A few notes:

1- Not all VM implementations apparently support the shutdownHook
properly. I do not have any solid evidence to this available, but this
is what I know I've read in places before.

2- http://java.sun.com/j2se/1.4.1/docs/guide/lang/hook-design.html
Is a good place to look at.

3- Perhaps for versions -1.3 to use this Runtime.runFinalizersOnExit

Martin