The Java API can be used to create new realms and connect realms together through importation of specific packages.
The core of the classworlds infrastructure is
the
ClassWorld
class. An application must create a ClassWorld instance.
It is advisable to store the instance as a singleton or some other
handy location.
Once a ClassWorld is created, realms within it
can be created. These realms effectively only allow loading
of the core JVM classes.
In order to make each ClassRealm useful, constituent
must be added to that each can provide certain classes.
Now, links between the various realms need to be created to allow classes loaded from one to be available to classes loaded in another.
The container implementation can then be loaded from it's realm and used.
Ideally, the container itself would be responsible for creating
a ClassRealm for each component that's loaded, and
importing the component contract interfaces into the component's
ClassRealm and using loadClass(..)
to gain entry into the sandboxed component realm.