I wonder if any tomcat guys have any insight they could share with us...
> -----Original Message----- > From: Noel J. Bergman [mailto:[EMAIL PROTECTED] > Sent: 01 August 2003 20:02 > To: James-Dev Mailing List > Cc: Ted Neward; Jeroen Frijters > Subject: JDK 1.4.2 and class loading > > > Apparently, there has been a subtle change in JDK 1.4.2. Either > intentional > or accidental, but the URL: > > file://path/jarfile.jar > > does not appear to work under JDK 1.4.2, at least on Windows (the platform > where this was noticed and tested today). Instead, the following URL does > work: > > jar:file:path/jarfile.jar!/ > > Which means that the code in o.a.j.transport.Loader would change: > > - jarlist.add(new URL("file://" + baseDirectory + "/SAR-INF/lib/" + > flist[i] )); > + jarlist.add(new URL("jar:file:" + baseDirectory + "/SAR-INF/lib/" + > flist[i] + "!/")); > > This behavior is noted at > http://forum.java.sun.com/thread.jsp?forum=26&thread=408858&tstart > =0&trange= > 15. Does anyone have any additional information on this issue? I'm not > spotting anything in the docs, release notes or javadocs. > > Two related questions. Does anyone have any thoughts on the use of > > new URLClassLoader(URL[]) vs URLClassLoader.newInstance(URL[]) > > Most examples use the latter form. There are is a code difference related > to package security and exported packages. The current Java v1.4.2 > documentation > (http://java.sun.com/j2se/1.4.2/docs/guide/extensions/spec.html) don't go > into it, but there is some information on exported packages in a > cached copy > of some docs from an older beta > (http://kavosh.irost.net/books/jdk1.2beta3/docs/guide/extensions/s pec.html). This probably doesn't effect our use AT THE MOMENT, but I'm surprised to see the the operations aren't synonyms. Also, we've ran into some cases where: classLoader.loadClass(className); fails, whereas: Class.forName(className, true, classLoader) works. The best analysis I have found on the subject so far is Ted Neward's paper at http://www.javageeks.com/Papers/ClassForName/index.html, but he doesn't really go too far into the details of WHY the latter behaves differently, other than acknowledging that it does. --- Noel --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
