jdk/src/java.management/share/classes/javax/management/loading/package.html
author uvangapally
Tue, 01 Aug 2017 10:33:47 +0530
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permissions -rw-r--r--
8181895: javax management docs contain links to technotes Summary: Edited links to point to Alternate paths Reviewed-by: rriggs Contributed-by: ujwal.vangapally@oracle.com
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<html>
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<head>
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<title>javax.management.loading package</title>
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<!--
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Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved.
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DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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This code is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License version 2 only, as
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published by the Free Software Foundation.  Oracle designates this
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particular file as subject to the "Classpath" exception as provided
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by Oracle in the LICENSE file that accompanied this code.
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This code is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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version 2 for more details (a copy is included in the LICENSE file that
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accompanied this code).
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You should have received a copy of the GNU General Public License version
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2 along with this work; if not, write to the Free Software Foundation,
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Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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or visit www.oracle.com if you need additional information or have any
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questions.
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-->
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</head>
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<body bgcolor="white">
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      <p>Provides the classes which implement advanced dynamic
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	loading.  See the chapter <em>Advanced Dynamic Loading</em> in
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	the <a href="#spec">JMX Specification</a>.</p>
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      <p>An MBean that is of a subclass of {@link
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	java.lang.ClassLoader} can be used as a class loader to create
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	other MBeans via the method {@link
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	javax.management.MBeanServer#createMBean(String, ObjectName,
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	ObjectName, Object[], String[])}, and to instantiate arbitrary
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	objects via the method {@link
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	javax.management.MBeanServer#instantiate(String, ObjectName,
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	Object[], String[])}.  The {@link
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	javax.management.loading.MLet MLet} class is an example of
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	such an MBean.  It is a {@link java.net.URLClassLoader
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	URLClassLoader}, so the list of URLs to load classes from can
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	be configured.</p>
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      <p>Additionally, an <code>MLet</code> can read a configuration
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	file that specifies a set of MBeans to be registered in the same
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	MBean Server as the <code>MLet</code>.</p>
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      <p>Every MBean Server has a <em>class loader repository</em>
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	containing all MBeans registered in that MBean Server that
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	are of a subclass of {@link java.lang.ClassLoader}.  The class
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	loader repository is used by the forms of the
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	<code>createMBean</code> and <code>instantiate</code> methods
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	in the {@link javax.management.MBeanServer MBeanServer}
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	interface that do not have an explicit loader parameter.  It
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	is also used by the <code>MLet</code> class when it does not
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	find a class in its own set of URLs.</p>
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      <p>If an MBean implements the interface {@link
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	javax.management.loading.PrivateClassLoader PrivateClassLoader},
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	then it is not added to the class loader repository.  The class
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	{@link javax.management.loading.PrivateMLet PrivateMLet} is a
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	subclass of <code>MLet</code> that implements
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	<code>PrivateClassLoader</code>.</p>
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    <p id="spec">
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    @see <a href="https://jcp.org/aboutJava/communityprocess/mrel/jsr160/index2.html">
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      JMX Specification, version 1.4</a>
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      @since 1.5
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</BODY>
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</HTML>