Instances of this interface are used to keep the list of ClassLoaders registered in an MBean Server. They provide the necessary methods to load classes using the registered ClassLoaders.
The first ClassLoader in a ClassLoaderRepository is
always the MBean Server's own ClassLoader.
When an MBean is registered in an MBean Server, if it is of a
subclass of java.lang.ClassLoader
and if it does not
implement the interface PrivateClassLoader
, it is added to
the end of the MBean Server's ClassLoaderRepository.
If it is subsequently unregistered from the MBean Server, it is
removed from the ClassLoaderRepository.
The order of MBeans in the ClassLoaderRepository is
significant. For any two MBeans X and Y in the
ClassLoaderRepository, X must appear before
Y if the registration of X was completed before
the registration of Y started. If X and
Y were registered concurrently, their order is
indeterminate. The registration of an MBean corresponds to the
call to MBeanServer#registerMBean
or one of the MBeanServer
.createMBean methods.
Load the given class name through the list of class loaders. Each ClassLoader in turn from the ClassLoaderRepository is asked to load the class via its method. If it successfully returns a Class object, that is the result of this method. If it throws a ClassNotFoundException , the search continues with the next ClassLoader. If it throws another exception, the exception is propagated from this method. If the end of the list is reached, a ClassNotFoundException is thrown.
Load the given class name through the list of class loaders,
stopping at the given one. Each ClassLoader in turn from the
ClassLoaderRepository is asked to load the class via its
method. If it successfully
returns a Class
object, that is the result of this
method. If it throws a ClassNotFoundException
, the
search continues with the next ClassLoader. If it throws
another exception, the exception is propagated from this
method. If the search reaches stop or the end of
the list, a ClassNotFoundException
is thrown.
Typically this method is called from the loadClass
method of
stop, to consult loaders that appear before it
in the ClassLoaderRepository. By stopping the
search as soon as stop is reached, a potential
deadlock with concurrent class loading is avoided.
Load the given class name through the list of class loaders,
excluding the given one. Each ClassLoader in turn from the
ClassLoaderRepository, except exclude, is asked to
load the class via its
method. If it successfully returns a Class
object,
that is the result of this method. If it throws a ClassNotFoundException
, the search continues with the next
ClassLoader. If it throws another exception, the exception is
propagated from this method. If the end of the list is
reached, a ClassNotFoundException
is thrown.
Be aware that if a ClassLoader in the ClassLoaderRepository calls this method from its loadClass method, it exposes itself to a deadlock if another ClassLoader in the ClassLoaderRepository does the same thing at the same time. The #loadClassBefore method is recommended to avoid the risk of deadlock.