1. Overview

Java Management EXtension, used to manage resources (applications, services, device, etc) within your JVM locally (in-box) or remotely (out-of-box).

It is developed through JSR3 (JMX SPEC), JSR160 (extension for remote management).

2. Architecture

[MBean Server] Agent <—-> connector (various protocols) <—-> management application
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[resources] MBean (instrumentation)
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JVM (local or remote)

MBean (Managed Java object, similar to JavaBean) is registered to the Agent, and resources are wrapped within MBeans, which is called instrumentation in JMX SPEC.

Interfaces:

The management interface of an MBean consists of:

• Named and typed attributes that can be read and/or written
• Named and typed operations that can be invoked
• Typed notifications that can be emitted by the MBean

MBeans can be instantiated and registered by:

• Another MBean
• The agent itself
• A remote management application

 The operations available on MBeans include:

• Discovering the management interface of MBeans
• Reading and writing their attribute values
• Performing operations defined by the MBeans
• Getting notifications emitted by MBeans
• Querying MBeans based on their object name or their attribute values

Management applications do the management throw agent services that operates on MBeans.

3. Resources

1. Java Management Extensions (JMX)

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• JVM Structure Study Notes

Tags: agent, javabean, jmx