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<p style="margin: 10px 0 0 0">I added a <tt>RatioGauge</tt> in the init which is based on the count exposed by the fetch and resolve <tt>Timer</tt> instances.</p>
<p style="margin: 10px 0 0 0">This exposed an issue. Some tests started failing since you can't register a metric under a name which already exists. So nominally I think that for components exposing internal metrics, they need to de-register all registered metrics as a part of their destroy() lifecycle.</p>
<p style="margin: 10px 0 0 0">That is based on the assumption that the metrics should only be tracked for the current instance of give class with a particular component ID. If on the other hand, one thinks that the metrics should survive all instances of the component for the ID (across Spring reloads, etc), then we shouldn't do this, although that does beg the question of how the metrics would ever get garbage collected in a long running system.</p>
<p style="margin: 10px 0 0 0">So at the moment I think removing on a destroy() is probably the right thing to do, but this is all very new, so I guess it's a discussion topic. </p>
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