2013/1/21 Peter Lavin <lav...@cs.tcd.ie>: > > Dear List, > > My web application needs to deserialize both classes and objects which are > sent to it. > > I'm using Base64 serialization, and when I transport full <name>.class file > to a service, I can deserialize it with no problem using > ObjectInputStream.readObject(). I also need to transport instances of > certain classes to the application but without having the benefit of having > the class loaded in the WebappClassLoader. Not surprisingly, deserializing > an instance of a class fails for ClassNotFoundException. > > My question: When I need to transport an instance of a class, I can easily > also transport the full class. This full class can be instantiated if > required. How could I load this class to the WebappClassLoader and have it > available there for when I need to call ois.readObject()? I want to load the > (full) class to the WebClassLoader to over come the ClassNotFoundException. >
The same as with any other ClassLoader: use the bytes and call ClassLoader.defineClass(..), then ClassLoader.resolveClass(..). There is an example in WebappClassLoader.clearReferencesJdbc() method (though resolveClass() is not called there, I do not know why - maybe it was just forgotten). > Env: > Tomcat 7.0.14 Known security issues: http://tomcat.apache.org/security-7.html > OSCentOS release 5.8 (Final) > java version 1.6.0 22 > OpenJDK Runtime Environment (IcedTea6 1.10.10) > (rhel-1.28.1.10.10.el5 8-x86 64) > OpenJDK 64-Bit Server VM (build 20.0-b11, mixed mode) > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
