On Mon, 25 Feb 2002 19:47, Jose Alberto Fernandez wrote: > From: "Peter Donald" <[EMAIL PROTECTED]> > > > On Mon, 25 Feb 2002 16:30, Conor MacNeill wrote: > > > > From: Peter Donald [mailto:[EMAIL PROTECTED] > > > > > > All of this is handled by the VM. Can you point out where the spec > > > deals with application resolution of optional packages? > > > > Hmm - I am fairly sure I answered this question last time ... > > > > It is ****NOT**** done by the JVM but needs to be implemented by > > container vendors. Avalon/Phoenix implements it, as does TC4 as does most > > newer servlet (and ejb?) containers because it is part of their spec. > > > > Look at they way that all the commons products now use it - even ant is > > following the spec now due to a recent contribution. Heres a basic > > reference > > > > http://java.sun.com/j2se/1.3/docs/guide/extensions/versioning.html > > > > Example dependency declaration > > > > Extension-List: javahelp > > javahelp-Extension-Name: javax.help > > javahelp-Specification-Version: 1.0 > > javahelp-Implementation-Version: 1.0.3 > > javahelp-Implementation-Vendor-Id: com.sun > > > > No location dependent information there. > > So, how does it work with Class-Path. You are proposing using Class-Path > don't you?
nope. "Class-Path:" manifest entries are another way of doing it but IMHO way too brittle because it requires very specific directory layout, colocation of jars and naming of jars. It is alos done by runtime and doesn't give any hooks to the container. > The stuff above is about the extension mechanism > which several people have mention here are evil and we should never ever > use etc, etc, etc. That would be the java.ext.dirs and I would be one of those people that say it is EVIL ;) > Are we changing out minds. > Can you post a proposal on how this libraries will work in the context of > ANT? Hmmm ... will do. Basically it consists of one jar declaring dependency like above. The container then decides how to satisfy the dependency. Myrmidon just chucks all the required jars into one ClassLoader but there are other alternative implementation strategies. Anyways I am flat out at work atm and wont have time to do it justice. Next monday is our deadline I believe (yaya!) so after that I will rework the docs I have for myrmidon and commit them. I believe they already cover many of these details. -- Cheers, Pete "The perfect way is only difficult for those who pick and choose. Do not like, do not dislike; all will then be clear. Make a hairbreadth difference and heaven and earth are set apart; if you want the truth to stand clear before you, never be for or against." - Bruce Lee -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
