Add Dropwizard like annotations

Add annotations like in Dropwizard

@Metered
@ExceptionMetered
@Counted
@Gauge
@CachedGauge
@Metric
@ResponseMetered

and Spring support for that

[paul-ovchinnikov]

Ok, let’s forget about DropWizard and its weird architecture. The main concern about micrometer that it’s a Pivotal project and a Spring Framework is the main project of Pivotal too. So why not to make micrometer more useful to integrate with Spring. Not as part of micrometer but as an additional bridge library ‘micrometer-spring’ for example. With annotations and BPP or static generator and blackjack. Annotations definitely make development easier and code cleaner. This issue the most discussed in micrometer project, but you just closed it. Maybe it is worth extending a little more attention to this issue and consider it up with your colleagues?

[jkschneider]

@gavlyukovskiy Is this easier than:

private AtomicInteger myGauge = Metrics.gauge("my.gauge", Tags.of("Tag", "Value"), new AtomicInteger(0));
private Counter myCounter = Metrics.counter("my.counter", Tags.of("Tag", "Value"));

??

The latter doesn’t require any AOP magic.