Robert, I see the problem and I believe there is a simple solution. Abstractly, the object serialization test is composed of two parts, a serialization part and a deserilization part. In principle, performing each part of the test entirely in a single object loaded by different classloaders should do the trick.
I am attaching here a very simple setup which illustrates the point. HTH, Ceki --- Robert Bushman <[EMAIL PROTECTED]> wrote: > Good pointer on the dual classLoaders, and I'm > stuck again. > > > First I tried just calling > ObjectInputStream.readObject(), > and it threw: > java.lang.ClassNotFoundException: > org.apache.log4j.spi.LoggingEvent > > This is because ObjectInputStream doesn't know > to use JarClassLoader, and log4j.jar is no longer > in my classpath. > > > Next I tried dynamically loading ObjectInputStream > using > the same JarClassLoader that has a reference to the > new log4j.jar. On calling ois.readObject() I still > get: > java.lang.ClassNotFoundException: > org.apache.log4j.spi.LoggingEvent > > This is because JarClassLoader is still delegating > the > loading to the root ClassLoader > (java.io.ObjectInputStream > is not in log4j.jar), which leaves ObjectInputStream > with a reference to root ClassLoader, instead of > the JarClassLoader. > > > So I altered JarClassLoader to also look in rt.jar > (the Sun jar that includes all the stock packages). > This should leave ObjectInputStream with a reference > to the JarClassLoader as it's ClassLoader. > This fails before JarClassLoader can even return > the O.I.S. Class definition. It throws: > java.lang.SecurityException: Prohibited package > name: java.io > > Which is the same problem as when I first started on > this with java.io.LoggingEventInputStream > > > Once again I feel I have reached an impasse. Any > ideas? > > > BTW, I already tried LoggingEvent.readObject( > ObjectInputStream ), > which throws: > java.io.NotActiveException: defaultReadObject > at java.io.ObjectInputStream.readFields > > Presumeably because ObjectInputStream does something > to initialize the stream before it calls > targetClass.readObject(). > > > ------------------------------------------------------------------- > Who owns your data? > Proprietary protocols and file formats are > dangerous. > ------------------------------------------------------------------- > > > > -- > To unsubscribe, e-mail: > <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: > <mailto:[EMAIL PROTECTED]> > __________________________________________________ Do You Yahoo!? Yahoo! GeoCities - quick and easy web site hosting, just $8.95/month. http://geocities.yahoo.com/ps/info1
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