Hi, could you get around the singleton problem by placing the singleton object's class outside the classloader which get busted when reloading the changed servlets/jsps? You could move it up to the 'shared' or even 'common' classspace. Do I understand it right, that these class loaders are not being destroyed when TC is running? I'm not so deep into that matter, maybe I completely misunderstand something...
Mika ----- Original Message ----- From: "Kevin A. Burton" <[EMAIL PROTECTED]> To: "Tomcat Developers List" <[EMAIL PROTECTED]> Sent: Monday, November 26, 2001 8:52 AM Subject: Re: 4.0.1 ClassLoader breaks singletons on webapp reload. > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Jon Stevens <[EMAIL PROTECTED]> writes: > > > on 11/25/01 9:57 PM, "Remy Maucherat" <[EMAIL PROTECTED]> wrote: > > > > > Of course, there's a reason for this, as a selective reloading would be a > > > very complex thing to do. > > > > > > Remy > > > > More like damn near impossible. Once the previous classloader has been > > trashed, all objects which were created within it would then become invalid. > > > > Kevin, the right thing to do is to setup something like Turbine's Services > > which have a shutdown process which can be invoked when the servlets destroy() > > method is called in order to shutdown the singletons. > > Ah. Interesting. This technique would work but would require the 'restart' > (there's that word again) the whole application. > > ... at this point I think it might make sense just to restart Tomcat as shutting > down and restarting the app would take just as long as a full restart. > > It is a shame because there is a lot of potential in just reloading that one > class. > > > Sadly, I have to admit that the Turbine Services framework shutdown code is > > currently broken and has been for some time now...it needs to be re-written... > > Are you saying that the theory is broken or just Turbine's impl? > > Kevin > > - -- > Kevin A. Burton ( [EMAIL PROTECTED], [EMAIL PROTECTED], [EMAIL PROTECTED] ) > Location - San Francisco, CA, Cell - 415.595.9965 > Jabber - [EMAIL PROTECTED], Web - http://relativity.yi.org/ > > Windows 95 - A 32 bit extension to a 16 bit shell for a 8 bit operating system > designed for 4 bit computers by a 2 bit company that can't stand 1 bit of > competition. > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.0.6 (GNU/Linux) > Comment: Get my public key at: http://relativity.yi.org/pgpkey.txt > > iD8DBQE8AfRrAwM6xb2dfE0RAuB1AJ0aAkQbAp5lkmnUMOVJ0BG0Ipf6YwCghsRo > +avbgG+W5aqsXELI1RKaPcI= > =Aq5S > -----END PGP SIGNATURE----- > > -- > To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: <mailto:[EMAIL PROTECTED]> > -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
