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   <title>JMX - foundation of JBoss infrastructure</title><link rel="stylesheet" href="styles.css" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/styles.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets Vimages/callouts/"><link rel="home" href="index.html" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/index.html" title="JBoss 3.0 Documentation"><link rel="up" href="ch12.html" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/ch12.html" title="Chapter 12. Container architecture - design notes"><link rel="previous" href="ch12s04.html" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/ch12s04.html" title="Client Objects"><link rel="next" href="ch12s21.html" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/ch12s21.html" title="ContainerInvoker - Container entry point"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><table border="0" cellpadding="0" cellspacing="0" height="65"><tr height="65"><td rowspan="2"><img src="jboss.gif" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/jboss.gif" border="0"></td><td rowspan="2" background="gbar.gif" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/gbar.gif" width="100%" align="right" valign="top"><a href="index.html" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/index.html"><img src="doc.gif" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/doc.gif" border="0"></a><a href="ch12.html" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/ch12.html"><img src="toc.gif" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/toc.gif" border="0"></a><a href="ch12s04.html" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/ch12s04.html"><img src="prev.gif" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/prev.gif" border="0"></a><a href="ch12s21.html" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/ch12s21.html"><img src="next.gif" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/next.gif" border="0"></a></td></tr><tr></tr></table><div class="section"><a name="design.jmx"></a><div class="titlepage"><div><h2 class="title" style="clear: both"><a name="design.jmx"></a>JMX - foundation of JBoss infrastructure</h2></div></div><div class="section"><a name="d0e8053"></a><div class="titlepage"><div><h3 class="title"><a name="d0e8053"></a>Introduction</h3></div></div><p>JMX technology represents a standard coherent framework for
instrumentation and management of Java
technology-based resources. JMX defines a management architecture, APIs, and
management services all
under a single umbrella specification. On top of this specification promises
hooks into existing management
systems.</p></div><div class="section"><a name="d0e8058"></a><div class="titlepage"><div><h3 class="title"><a name="d0e8058"></a>JMX core components</h3></div></div><p>MBeanServer is core JMX abstraction, a component which provides
services for manipulating MBeans. All
management operations performed on MBeans are done through MBeanServer
interface. MBeanServer
contains the necessary methods for the creation, registration, and deletion of
MBeans as well as the access
methods for registered MBeans. This is the core component of the JMX
infrastructure.</p><p>MBean is a "regular" Java component volunteering to be instrumented.
Every MBean component which is
added to the MBeanServer becomes manageable: its attributes and operations
become remotely accessible
through the connectors/adaptors connected to that MBeanServer. A Java object
cannot be registered in
the MBeanServer unless it is a JMX compliant MBean.</p></div><div class="section"><a name="d0e8065"></a><div class="titlepage"><div><h3 class="title"><a name="d0e8065"></a>JBoss and JMX</h3></div></div><p>MBeanServer in Jboss architecture plays a role of microkernel
aggregator component. All other managable
MBeans components are plugged into MBeanServer. The kernel in that sense is
only an aggregator, and not
a source of actual functionality. The functionality is provided by MBeans and
infact all major JBoss
components, are managable MBeans interconnected through MBeanServer. The
managibility is provied by
MBeanServer which instuments registered MBeans.</p><p>The modular architecture of JBoss , provided by JMX foundation
moves all dependency checking from
compile time to run-time enviroment. The rigourous runtime depedencies
check mechanism, in the form
of JBoss' DependencyManager component, enforces dependencies between different
resources and services.</p><p>It is important to notice that "management dependencies" are
something independent of the managed
blocks but dependent on the context of a particular deployment/environment. In
any case, the dependencies
are runtime oriented and the external management of them (JMX) is the way
to go.</p></div></div><table border="0" cellpadding="0" cellspacing="0" height="65"><tr height="65"><td rowspan="2"><img src="gbar.gif" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/gbar.gif" width="432" height="79"></td><td rowspan="2" background="gbar.gif" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/gbar.gif" width="100%" align="right" valign="top"><a href="index.html" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/index.html"><img src="doc.gif" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/doc.gif" border="0"></a><a href="ch12.html" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/ch12.html"><img src="toc.gif" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/toc.gif" border="0"></a><a href="ch12s04.html" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/ch12s04.html"><img src="prev.gif" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/prev.gif" border="0"></a><a href="ch12s21.html" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/ch12s21.html"><img src="next.gif" tppabs="http://www.huihoo.org/jboss/online_manual/3.0/next.gif" border="0"></a></td></tr><tr></tr></table></body></html>
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