Java Management Extensions (JMX)

The Java Management Extensions (JMX) API is a standard API for management and monitoring of resources such as applications, devices, services, and the Java virtual machine. The JMX technology was developed through the Java Community Process (JCP) as Java Specification Request (JSR) 3, Java Management Extensions, and JSR 160, JMX Remote API.
Typical uses of the JMX technology include:

Consulting and changing application configuration

Accumulating statistics about application behavior and making them available

Notifying of state changes and erroneous conditions.

The JMX API includes remote access, so a remote management program can interact with a running application for these purposes.

Overview

Overview - This overview provides an introduction to the JMX technology.

API Specification

API Reference - Online documentation for all JMX packages, classes and members of the agent and instrumentation RI, as generated by the Javadoc tool.

Tutorials and Programming Guides

Tutorial - This tutorial presents some examples of the features of the JMX technology.
Examples - The JMX reference implementation contains code examples for different areas of JMX operation.

In addition to the above examples, once you have installed the Java Development Kit (JDK) 6, a sample application that demonstrates a real-life implementation of the JMX API can be found in the following directory:
JDK_HOME/sample/jmx/jmx-scandir
In the path above, JDK_HOME is the directory in which the JDK software is installed. The jmx-scandir example is an advanced example, which presents advanced concepts of the JMX API in a real-world scenario.

API Enhancements

API Enhancements in Java SE 6 - A list of JMX API changes between the J2SE 5.0 and Java SE 6 releases.

More Information

JMX home page - The page for news, downloads, blogs and other information about the JMX specification.
JMX 1.4 Specification (PDF)
JMX Tracing - Traces in the JMX implementation are based on the Java SE logging capability.
JSR 3 - The JCP page for the JMX API.
JSR 160 - The JCP page for the JMX Remote API.
Java SE Monitoring and Management documentation