metrics-jetty9 (Jetty 9.3 and higher) modules provides a set of instrumented equivalents of Jetty classes:
Connector implementations are simple, instrumented subclasses of the Jetty connector types
which measure connection duration, the rate of accepted connections, connections, disconnections,
and the total number of active connections.
InstrumentedQueuedThreadPool is a
QueuedThreadPool subclass which measures the ratio of idle
threads to working threads as well as the absolute number of threads (idle and otherwise).
InstrumentedHandler is a
Handler decorator which measures a wide range of HTTP behavior:
dispatch times, requests, resumes, suspends, expires, the number of active, suspected, and
dispatched requests, as well as meters of responses with
5xx status codes. It even has gauges for the ratios of
5xx response rates to
overall response rates. Finally, it includes meters for requests by the HTTP method: