CODEWITHSUNDEEP
javaweb-applicationsjbossjmx
codingbear
codingbear

Reputation: 15063

Getting Active Session counts with JMX (Java Management Extensions) API

I'm trying to use JMX API to get active session counts for a web application.

  1. Is it possible to use JMX API to get this kind of information?
  2. If yes, how reliable would it be?
  3. Any example code on how to get this done?

I've been reading JMX tutorial and documentation, but they are giving me the overview of what the technology is. I just can't pinpoint to what I need, yet.

Upvotes: 6

Views: 38489

Answers (5)

Mateu
Mateu

Reputation: 2698

ObjectName name = new ObjectName("Catalina:type=Manager,path=/NAME_OF_APP,host=localhost"); 
ManagementFactory.getPlatformMBeanServer().getAttribute(name, "activeSessions");

Upvotes: 3

user294943
user294943

Reputation:

The answer given by skaffman is quite helpful, but I would amend that JBoss is able to give you the sessions per webapp by looking for:

host=localhost,path=/your_webapp_context,type=Manager

(replace your_webapp_context with the context of the webapp you are interested in...)

Upvotes: 0

skaffman
skaffman

Reputation: 403451

JBoss already exposes the active session count via JMX, but only across the whole server, not per webapp. If you only have one webapp being used, then that should be OK for you.

Go the JMX console on port 8080, and look for the entry called host=localhost,path=/,type=Manager. Inside that you'll find a entry for active session count.

Upvotes: 1

digitalsanctum
digitalsanctum

Reputation: 3299

You can accomplish this by using something like JConsole or JVisualVM once you configure your app server to expose a JMX port. You don't mention which app server you're using but for Tomcat, it's described here: http://tomcat.apache.org/tomcat-5.5-doc/monitoring.html. Once you connect with JConsole, Tomcat exposes an MBean which has session information but again it depends which container you use.

Upvotes: 5

John Doe
John Doe

Reputation: 867

To track the sessions you could use an HttpSessionListener . If you want to expose the active sessions via JMX, you could register a mbean and call it from other applications(see JMX documentation).

Upvotes: 2

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