Joerg Hoh created SLING-10967:
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Summary: Improve Gauge support in metrics
Key: SLING-10967
URL: https://issues.apache.org/jira/browse/SLING-10967
Project: Sling
Issue Type: Improvement
Components: Commons
Affects Versions: Commons Metrics 1.2.8
Reporter: Joerg Hoh
Currently Sling Metrics only support Gauges via the whiteboard approach (see
SLING-5966).
To leverage gauges you have to register a gauge instance by yourself using the
OSGI Framework API and also its whole livecycle. The Sling MetricsService
should be able to handle this for you as well like it does for the other metric
types (e.g. counter).
I propose to extend the MetricsService by a new method:
{code}
Gauge<T> registerGauge (String name, Supplier<T> supplier);
{code}
which registers a Gauge which on every request to {{getValue()}} calls the
provided supplier. In most cases the returned Gauge object is not used, but it
is returned for consistency with other methods of the MetricsService.
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