brettwooldridge/HikariCP — pull request #154 by john-f-xoom (2014-10-01 15:19:32+00:00)
Title: #112: allow clients to provide an IMetricsTracker instance directly

...rather than having to specify a class name.

This eases wiring metrics with Spring for clients who wish to do so, without introducing any new dependencies within Hikari or committing to a specific metrics library in the API.