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| <title>javax.management.loading package</title> |
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| |
| <p>Provides the classes which implement advanced dynamic |
| loading. See the chapter <em>Advanced Dynamic Loading</em> in |
| the <a href="#spec">JMX Specification</a>.</p> |
| |
| <p>An MBean that is of a subclass of {@link |
| java.lang.ClassLoader} can be used as a class loader to create |
| other MBeans via the method {@link |
| javax.management.MBeanServer#createMBean(String, ObjectName, |
| ObjectName, Object[], String[])}, and to instantiate arbitrary |
| objects via the method {@link |
| javax.management.MBeanServer#instantiate(String, ObjectName, |
| Object[], String[])}. The {@link |
| javax.management.loading.MLet MLet} class is an example of |
| such an MBean. It is a {@link java.net.URLClassLoader |
| URLClassLoader}, so the list of URLs to load classes from can |
| be configured.</p> |
| |
| <p>Additionally, an <code>MLet</code> can read a configuration |
| file that specifies a set of MBeans to be registered in the same |
| MBean Server as the <code>MLet</code>.</p> |
| |
| <p>Every MBean Server has a <em>class loader repository</em> |
| containing all MBeans registered in that MBean Server that |
| are of a subclass of {@link java.lang.ClassLoader}. The class |
| loader repository is used by the forms of the |
| <code>createMBean</code> and <code>instantiate</code> methods |
| in the {@link javax.management.MBeanServer MBeanServer} |
| interface that do not have an explicit loader parameter. It |
| is also used by the <code>MLet</code> class when it does not |
| find a class in its own set of URLs.</p> |
| |
| <p>If an MBean implements the interface {@link |
| javax.management.loading.PrivateClassLoader PrivateClassLoader}, |
| then it is not added to the class loader repository. The class |
| {@link javax.management.loading.PrivateMLet PrivateMLet} is a |
| subclass of <code>MLet</code> that implements |
| <code>PrivateClassLoader</code>.</p> |
| |
| <p id="spec"> |
| @see <a href="{@docRoot}/../technotes/guides/jmx/"> |
| Java Platform documentation on JMX technology</a>, |
| in particular the |
| <a href="{@docRoot}/../technotes/guides/jmx/JMX_1_4_specification.pdf"> |
| JMX Specification, version 1.4(pdf).</a> |
| |
| @since 1.5 |
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