| Provides MBean server references. There are no instances of
this class.
Since JMX 1.2 this class makes it possible to replace the default
MBeanServer implementation. This is done using the
javax.management.MBeanServerBuilder class.
The class of the initial MBeanServerBuilder to be
instantiated can be specified through the
javax.management.builder.initial system property.
The specified class must be a public subclass of
javax.management.MBeanServerBuilder , and must have a public
empty constructor.
By default, if no value for that property is specified, an instance of
javax.management.MBeanServerBuilder javax.management.MBeanServerBuilder is created. Otherwise, the MBeanServerFactory attempts to load the
specified class using
java.lang.Thread.getContextClassLoaderThread.currentThread().getContextClassLoader() , or if that is null,
java.lang.Class.forName(java.lang.String) Class.forName() . Then
it creates an initial instance of that Class using
java.lang.Class.newInstance . If any checked exception
is raised during this process (e.g.
java.lang.ClassNotFoundException ,
java.lang.InstantiationException ) the MBeanServerFactory
will propagate this exception from within a RuntimeException.
The javax.management.builder.initial system property is
consulted every time a new MBeanServer needs to be created, and the
class pointed to by that property is loaded. If that class is different
from that of the current MBeanServerBuilder, then a new MBeanServerBuilder
is created. Otherwise, the MBeanServerFactory may doCreate a new
MBeanServerBuilder or reuse the current one.
If the class pointed to by the property cannot be
loaded, or does not correspond to a valid subclass of MBeanServerBuilder
then an exception is propagated, and no MBeanServer can be created until
the javax.management.builder.initial system property is reset to
valid value.
The MBeanServerBuilder makes it possible to wrap the MBeanServers
returned by the default MBeanServerBuilder implementation, for the purpose
of e.g. adding an additional security layer.
author:
Young Yang | 