Support Forums: Message List - Andy Oliver: Versioning and Classloading in Java http://www.theserverside.com Most recent forum messages en Jive Forums Silver 5.5.30 (www.jivesoftware.com) Thu, 23 May 2013 12:42:09 -0400 Isolation is a completely othogonal concern http://www.theserverside.com/discussions/thread.tss?thread_id=40229 The system I mention would allow for...]]> Fri, 05 May 2006 04:13:35 -0400 Fri, 05 May 2006 04:13:35 -0400 Fri, 05 May 2006 04:13:35 -0400 May 5, 2006 p huber 0 Isolation is a completely othogonal concern: moreover... http://www.theserverside.com/discussions/thread.tss?thread_id=40229
 Moreover your example shows the problems which do derive from badly designed Library evolution.
 consider this...]]> Thu, 04 May 2006 17:01:45 -0400 Thu, 04 May 2006 17:01:45 -0400 Thu, 04 May 2006 17:01:45 -0400 May 4, 2006 Simone Avogadro 0 Class loading: terrible and confusing. Is it really necessary? http://www.theserverside.com/discussions/thread.tss?thread_id=40229 >Hi Steve,Yes, I believe this is the next layer of the onion. How do you bind objects whose classes have changed dynamically. Gemstone sounds interesting, I've heard good things about it too.Paul.
It is good - I had a...]]> Thu, 04 May 2006 12:28:44 -0400 Thu, 04 May 2006 12:28:44 -0400 Thu, 04 May 2006 12:28:44 -0400 May 4, 2006 Steve Zara 0 Class loading: terrible and confusing. Is it really necessary? http://www.theserverside.com/discussions/thread.tss?thread_id=40229
Classloading seems limiting and terrible. But as you dig down into it, and see what's really going on, you keep finding that each annoyance and limitation is there for a reason.
Yes, but is this just a...]]> Thu, 04 May 2006 11:25:59 -0400 Thu, 04 May 2006 11:25:59 -0400 Thu, 04 May 2006 11:25:59 -0400 May 4, 2006 Paul Beckford 1 Really naive solution http://www.theserverside.com/discussions/thread.tss?thread_id=40229 Thu, 04 May 2006 09:57:04 -0400 Thu, 04 May 2006 09:57:04 -0400 Thu, 04 May 2006 09:57:04 -0400 May 4, 2006 George Coller 0 Class loading: terrible and confusing. Is it really necessary? http://www.theserverside.com/discussions/thread.tss?thread_id=40229
Classloading seems limiting and terrible. But as you dig down into it, and see what's really going on, you keep finding that each annoyance and limitation is there for a reason.
Yes, but is this just a natural...]]> Thu, 04 May 2006 09:43:08 -0400 Thu, 04 May 2006 09:43:08 -0400 Thu, 04 May 2006 09:43:08 -0400 May 4, 2006 Steve Zara 2 Manifest versions http://www.theserverside.com/discussions/thread.tss?thread_id=40229 I agree that Java needs a formal versionsins sol'n, and I htink what theys tarted in the manifest is the right idea. They just need to finish it, or start anew but with the same spirit.
Or perhaps just use the existing OSGi...]]> Thu, 04 May 2006 09:27:50 -0400 Thu, 04 May 2006 09:27:50 -0400 Thu, 04 May 2006 09:27:50 -0400 May 4, 2006 Rickard Oberg 0 Manifest versions http://www.theserverside.com/discussions/thread.tss?thread_id=40229 Thu, 04 May 2006 09:15:34 -0400 Thu, 04 May 2006 09:15:34 -0400 Thu, 04 May 2006 09:15:34 -0400 May 4, 2006 Brian Sayatovic 1 Andy Oliver: Versioning and Classloading in Java http://www.theserverside.com/discussions/thread.tss?thread_id=40229 inform Andy Oliver.

Cheers
Alan Mehio
London, The City]]> Thu, 04 May 2006 07:59:33 -0400 Thu, 04 May 2006 07:59:33 -0400 Thu, 04 May 2006 07:59:33 -0400 May 4, 2006 Alan Mehio 0 Class loading: terrible and confusing. Is it really necessary? http://www.theserverside.com/discussions/thread.tss?thread_id=40229 Classloading seems limiting and terrible. But as you dig down into it, and see what's really going on, you keep finding that each annoyance and limitation is there for a reason.
Yes, but is this just a natural consequence of...]]> Thu, 04 May 2006 04:29:04 -0400 Thu, 04 May 2006 04:29:04 -0400 Thu, 04 May 2006 04:29:04 -0400 May 4, 2006 Paul Beckford 3 Andy Oliver: Versioning and Classloading in Java http://www.theserverside.com/discussions/thread.tss?thread_id=40229 Yes, ofcourse. For a given class-version you'd be sharing the same 'Class' object across all of the JVM and so its 'static' members as well.I don't see why this would be an issue? Infact, to have anything less is 'invalid' in my...]]> Wed, 03 May 2006 23:06:15 -0400 Wed, 03 May 2006 23:06:15 -0400 Wed, 03 May 2006 23:06:15 -0400 May 3, 2006 Jason Carreira 0 Wow, now that makes sense! http://www.theserverside.com/discussions/thread.tss?thread_id=40229 I remember a particularly bad problem we once had with Weblogic, where we wanted two "components" packaged as seperate ears to talk to each other.Well we spent weeks and couldn't get it to work. We ended up having to unpackage an...]]> Wed, 03 May 2006 20:47:26 -0400 Wed, 03 May 2006 20:47:26 -0400 Wed, 03 May 2006 20:47:26 -0400 May 3, 2006 Bob Lee 0 Wow, now that makes sense! http://www.theserverside.com/discussions/thread.tss?thread_id=40229 If you were truly confident in your knowledge, you wouldn't care what Bob said or how he said it. Frankly, I thought your original post was crap, but your follow-ups are almost starting to make me wonder if you do possibly have some previous...]]> Wed, 03 May 2006 20:03:07 -0400 Wed, 03 May 2006 20:03:07 -0400 Wed, 03 May 2006 20:03:07 -0400 May 3, 2006 Paul Beckford 1 Isolation is a completely othogonal concern http://www.theserverside.com/discussions/thread.tss?thread_id=40229 I believe Andy clearly outlined the problem:Instances of the same class definition loaded by different class-loaders (due to tier/module separation) are incompatible when passed between the tiers/modules. I believe this is a common...]]> Wed, 03 May 2006 19:46:34 -0400 Wed, 03 May 2006 19:46:34 -0400 Wed, 03 May 2006 19:46:34 -0400 May 3, 2006 Bob Lee 0 Class loading: terrible and confusing, yet necessary http://www.theserverside.com/discussions/thread.tss?thread_id=40229 Wed, 03 May 2006 18:29:32 -0400 Wed, 03 May 2006 18:29:32 -0400 Wed, 03 May 2006 18:29:32 -0400 May 3, 2006 Sony Mathew 0