Module java.management

# Package javax.management.loading

package javax.management.loading

Provides the classes which implement advanced dynamic loading. See the chapter Advanced Dynamic Loading in the JMX Specification.

An MBean that is of a subclass of `ClassLoader` can be used as a class loader to create other MBeans via the method `MBeanServer.createMBean(String, ObjectName, ObjectName, Object[], String[])`, and to instantiate arbitrary objects via the method `MBeanServer.instantiate(String, ObjectName, Object[], String[])`. The `MLet` class is an example of such an MBean. It is a `URLClassLoader`, so the list of URLs to load classes from can be configured.

Additionally, an `MLet` can read a configuration file that specifies a set of MBeans to be registered in the same MBean Server as the `MLet`.

Every MBean Server has a class loader repository containing all MBeans registered in that MBean Server that are of a subclass of `ClassLoader`. The class loader repository is used by the forms of the `createMBean` and `instantiate` methods in the `MBeanServer` interface that do not have an explicit loader parameter. It is also used by the `MLet` class when it does not find a class in its own set of URLs.

If an MBean implements the interface `PrivateClassLoader`, then it is not added to the class loader repository. The class `PrivateMLet` is a subclass of `MLet` that implements `PrivateClassLoader`.

Since:
  1.5
See Also:
  - JMX Specification, version 1.4

Related Packages
Package
Description
javax.management
Provides the core classes for the Java Management Extensions.
Class
Description
ClassLoaderRepository
Instances of this interface are used to keep the list of ClassLoaders registered in an MBean Server.
DefaultLoaderRepository
Deprecated.
Use `MBeanServer.getClassLoaderRepository()` instead.
MLet
Allows you to instantiate and register one or several MBeans in the MBean server coming from a remote URL.
MLetContent
This class represents the contents of the `MLET` tag.
MLetMBean
Exposes the remote management interface of the MLet MBean.
PrivateClassLoader
Marker interface indicating that a ClassLoader should not be added to the `ClassLoaderRepository`.
PrivateMLet
An MLet that is not added to the `ClassLoaderRepository`.