JMX: Difference between revisions

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===Thread Monitoring and Management===
===Thread Monitoring and Management===


====ThreadMXBean====
* [[ThreadMXBean Platform MBean]]
 
{{External|http://docs.oracle.com/javase/8/docs/api/java/lang/management/ThreadMXBean.html}}
 
Represents the management interface for the thread system of the Java virtual machine. It is accessible under the "java.lang:type=Threading" JMX ObjectName.
 
Metrics:
 
* <span id="ThreadCount"></span>'''ThreadCount''' - the current number of live threads including both daemon and non-daemon threads.


===O/S Information===
===O/S Information===

Revision as of 14:29, 3 May 2017

External

Internal

Overview

Subjects

Concepts

MXBean

An MXBean is a kind of MBean. For more details see

http://docs.oracle.com/javase/7/docs/api/javax/management/MXBean.html#mxbean-def

Open Type

http://docs.oracle.com/javase/7/docs/api/javax/management/openmbean/OpenType.html

The Platform MBean Server

The platform MBean server is an MBean server that is built into the JVM. It can be accessed and shared by all managed components that are running in that JVM. It can be retrieved with java.lang.management.ManagementFactory.getPlatformMBeanServer(). The platform MBean server was introduced in Java 5. javax.management.MBeanServerFactory can be used to create a different MBean server, or look up an already existing MBean server (that is not the platform server).

For a code example of how to look up the platform MBean server and how to register an arbitrary MBean to it, see

https://github.com/NovaOrdis/playground/blob/master/http/http-server/src/main/java/io/novaordis/playground/http/server/Main.java

Platform MXBeans

A platform managed object is an JMX MXBean deployed on a JVM's platform MBean server. Platform MXBeans expose monitoring and management capabilities for components of the Java platform.

Platform MXBeans only use a set of basic data types, so a JMX management application and the platform MBeanServer can interoperate without requiring classes for MXBean specific data types. The data types being transmitted between the management client and the JMX server are open types and this allows interoperation across versions.

Common platform MXBeans:

Memory Monitoring and Management

Thread Monitoring and Management

O/S Information

Other Monitoring and Management Components