How to invoke a java class during UCM 10gR3 startup ?

I am integrating AD4J (Application Diagnostic for Java) with UCM (Universal Content Management , earlier stellent) to monitor my UCM's JVM.
This is very simple configuration where I have to add java class (jamagent.jamrun) in my UCM's startup program. This class (jamagent.jamrun) is in zip file ad4jagent.zip which I have added in classpath via intradoc.cfg
JAVA_CLASSPATH_ad4j=$SHAREDDIR/classes/jamagent.zip
Issue now is that I am unable to find java [content_server_startup_class] so can't add class jamagent.jamrun .
As per my understanding : idcserver_start -> idcserver_ctr -> Launcher.sh -> Launcher (This launcher is executable)
I am unable to understand where or how can I invoke jamagent.jamrun class with my UCM startup ?

Java-code in a custom component could be triggering on a filter event that occurs during the startup of UCM, like extraAfterConfigInit. Would that be sufficient for loading yourAD4J?
Other than that, it is my understanding that every jar that you put in the classes folder of UCM is loaded on startup.
I hope this helps.
Regards,
Wim

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