Suppose you have exposed some mbeans using JMX. You can connect to the JMX service like this:
java -jar jmxterm.jar --url $service_url
service_url is the URL of the JMX service, which you can usually find out in the logs when starting up your service. In my case, working in a Camel container, it looks like this:
Next you need to find the bean you want to manipulate, you can search for available beans with the
beans command. To narrow down the list, it is helpful to specify the domain of the bean, for example:
beans -d net.sf.ehcache
Next, to do something with the bean you need to select it with the
bean command, for example:
bean -d net.sf.ehcache $bean
bean is the full name of the bean as you found previously with the
beans command. It’s pretty long, so you definitely want to copy & paste rather than typing.
You can put this commands in text file and run them non-interactively like this:
java -jar jmxterm.jar --url $service_url -i /path/to/my-jmx.script
You can get jmxterm from here, with good documentation:
If you need a GUI tool, VisualVM (the official tool by Sun) is fantastic.
I actually blogged about that a while back: