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From Apache Wiki <>
Subject [Commons Wiki] Update of "Monitoring" by nicolasDeLoof
Date Wed, 23 Jan 2008 16:20:43 GMT
Dear Wiki user,

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The following page has been changed by nicolasDeLoof:

New page:
'''Monitoring''' design document

commons-monitoring defines a limited set of classes (interface) for application instrumentation

 * '''Monitor''' is used to specify a monitored resource (with very large sense), defined
by a Key. The key itslef is a composite of a name, a category (technical application layering)
and subsystem (fonctionnal)

 * '''Repository''' to get or create monitors

 * '''StatValue''' to handle application state. It supports some basic statisticals. Derived
interface '''Gauge''' and '''Counter''' provide more specific methods.

A monitor handle a set of values, identified by roles Strings. Some default roles are defined
for ''PERFORMANCES'' and multi-thread ''CONCURRENCY''.

TODO explain period-based monitoring like "per 5 minutes values" used to build monitoring

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