Hi Osvaldo,
As previous responses, you can use the default agent.
Regarding how to enable the agent:
Is jetty running as a standalone app or it is bundled with some specific appservers? I found various references in internet, to summary, I think you have the below options:
a) pass the wily javaagent argument when starting the Jetty server. For example:
java -javaagent:/<agent_home>/javaagent.jar -Dcom.wily.introscope.agentProfile=/<agent_home>/core/config/IntroscopeAgent.profile -jar start.jar
b) use the jetty startup configuration file, edit the start.ini file then add the following lines:
--exec
-javaagent:/<agent_home>/Agent.jar
c) Add the wily jvm arguments to the beginning of the jetty.sh file.
java -javaagent:/<agent_home>/Agent.jar -Dcom.wily.introscope.agentProfile=/<agent_home>/core/config/IntroscopeAgent.profile ...
I suggest you to review the documentation/manuals of your jetty version for exact steps how to configure any additional jvm options
I hope this helps,
Regards,
Sergio