Re: Help with JSR 77 Performance Monitoring Implementation

[Christopher M. Cardona]

Hi Lasantha,

Good to know you’re interested in this work. The more help we get, the 
merrier. The general steps for adding J2EE managed object statistics are:

1. Find the J2EE managed object class and modify the 
isStatisticsProvider() method to return true.
2. Have the J2EE managed object class implement StatisticsProvider 
interface and provide an implementation for the method: Stats 
getStats(). This should return an instance of the matching Stats 
interface (e.g., ServletStats) for the J2EE managed object.

Note that a major part of this work is finding the right J2EE managed 
object and adding a way to gather the statistics needed if it’s not yet 
provided. So far that’s where we need a lot of help. We need to know how 
to get the needed statistics. Best case is if the J2EE managed object is 
already gathering the needed data and all we need to do is expose it. 
Otherwise, we need to add that functionality.

I hope this can get you started. ;-)

Best wishes,
chris

Lasantha Ranaweera wrote:
Hi Chris,

I would like to contribute to this work in the Geronimo too ;-) .

Went through the JSR. Saw Jetty implementation is already available 
there even though it is commented in the source code. I hope to start 
from Tomcat side.

Any help would be appriciated.

Thanks,
Lasantha Ranaweera

Christopher M. Cardona wrote:
CORRECTION: The 'Implementing Class' column was modified to 
'StatisticsProvider Class' column. This column lists the classes that 
implement the StatisticsProvider interface which defines a method to 
return a specific managed object Stats.

Christopher M. Cardona wrote:
I’m currently looking on how to implement JSR 77 Stats interfaces 
(GERONIMO-2517) and I've created a wiki page to keep track of the 
progress: 
http://cwiki.apache.org/confluence/display/GMOxDEV/JSR+77+Performance+Monitoring+%28Stats+Interfaces%29 


This page lists the Stats interface required by each managed object 
type including the methods to be implemented. The ‘Implementing 
Class’ column is the specific Class that would implement the 
corresponding Stats interface and this is where I need some input 
from you guys. Implementing these interfaces might involve source 
modification of other projects that Geronimo uses (e.g. Openejb, 
ActiveMQ, Jetty, Tomcat, etc.) and it would really help if domain 
experts on these projects provide suggestions and info on how and 
where to implement the said interfaces. It would also help to bring 
up possible issues when implementing the said interfaces. Please 
feel free to modify the wiki page for corrections or additions.

Here’s a list of Stats interfaces that we can implement and support 
in Geronimo:

1. EJBStats
2. SessionBeanStats
3. StatelessSessionBeanStats
4. StatefulSessionBeanStats
5. MessageDrivenBeanStats**
6. EntityBeanStats
7. ServletStats
8. JCAStats
9. JCAConnectionStats
10. JCAConnectionPoolStats
11. JTAStats
12. JDBCStats
13. JDBCConnectionStats
14. JDBCConnectionPoolStats
15. JMSStats
16. JMSConnectionStats
17. JMSSessionStats
18. JMSEndpointStats
19. JMSProducerStats
20. JMSConsumerStats
21. JavaMailStats
22. URLStats
23. JVMStats (Already implemented)

Thanks,
chris