Actual number of bean instances in the pool

[cari34]

hi guys,
I was wandering if there is a way to
get at runtime the
actual number of EJB instances in the pool ?

Imagine I have an EJB client
that wants to know the
number of bean instances present
in the pool at a given time.

Does anybody have any tips ar tricks how this
information could be gotten?

Thank you
Cari

[juha]

Look at the jboss.j2ee:jndiName=xxx,plugin=pool,service=EJB MBean.

[cari34]

Hi Juha,
thank you for your reply.
Sorry, I cannot understand what you mean.
Please, could you explain further.

thank you very much.
Carri.

[cvandyck]

What Juha is saying is that there is an MBean for each of your entity beans that supports the reporting that you are needing.

MBean is short for Management Bean, and is part of the JMX (Java Management Extensions) specification.

You can read more about JMX here:

http://java.sun.com/products/jmx/overview.html

And in the JBoss documentation.

You can access these beans at runtime, although I don't have the code handy to show you.

Also, once you have JBoss up and running, go to

http://localhost:8080/jmx-console (assuming you are running on port 8080), and you'll see links like the one Juha posted. There's an MBean for each entity you deploy for which the MBean will report the ReadyCount, PooledCount, etc. You can access that information through this web interface as well as in your code.

HTH

[cari34]

Hi HTH,
Thank you for your reply.
Just for information, I use stateless session beans.

Thank you.
Cari

[cvandyck]

Hi Cari,

No problem, you will be able to find this information not only for entity beans, but also stateless session beans. I'm sorry if my post was misleading in that regard.

Collin

ps. HTH == Hope This Helps :)