NonStop Servlets for JavaServer Pages (NSJSP) 6.1 System Administrator's Guide

NonStop Servlets for JavaServer Pages (NSJSP) 6.1 System Administrator’s Guide—596210-006
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MBeans in the NSJSP Container
This appendix describes NSJSP MBeans, how the MBeans are represented in the
NSJSP Manager application, and lists the MBeans that are commonly used in NSJSP.
This appendix addresses the following topics:

Prerequisites

Overview

Object Names and Attributes of MBeans

MBeans Representation in NSJSP Manager

Commonly Used MBeans in NSJSP
Prerequisites
To understand the concept of MBeans and how they are used to obtain information
about the servlet container components, you must be aware of the following:

Java Management Extensions (JMX) technology and how it can be used to
manage Java resources, such as, a Java application, a JDBC connection, or a
servlet.

NSJSP servlet container components, such as, Server, Service, Engine,
Connector, and Host. A knowledge of these components is required to understand
how these components are instrumented by MBeans.
For information on how JMX and MBeans facilitate the management of Java resources
deployed on a Java Virtual Machine (JVM), see
http://java.sun.com/javase/6/docs/technotes/guides/jmx/index.html
.
Overview
Starting with the NSJSP 6.0 release, NSJSP components (such as, Server, Connector,
Engine, Host, and Contexts) are instrumented by MBeans. Thus, the NSJSP
components can be managed using the JMX technology. You can use MBeans to
obtain information about the NSJSP components.
Note. NSJSP extensively uses dynamic MBeans. The dynamic MBeans allow NSJSP to
define the management interface at run time. NSJSP uses the mbeans-descriptors.xml
file to identify the MBean's management interface. Most of the MBeans have the management
interface defined at run time. While using the NSJSP Manager to view the MBean attribute,
some MBeans display the attributes, such as managedResource and modelerType, which
indicates that the resource is being managed by the MBean.