Support for @Timed in any Spring-managed bean

As of v1.0.0-rc.7 @Timed put on a method of an arbitrary Spring-managed bean is silently ignored. It would be useful to be able to generate metrics for any kind of beans (e.g. Services with non-RestTemplate remote system calls) without writing a custom AOP logic.

[jkschneider]

The TimedAspect aspect now exists in micrometer-core, but will not be autoconfigured in Spring Boot 2 or micrometer-spring-legacy. We can revisit application of @Timed via AOP or a BPP in Boot 2.1, depending on how the community reacts to the feature.

To configure manually:

@Configuration
@EnableAspectJAutoProxy
public class AutoTimingConfiguration {
   @Bean
   public TimedAspect timedAspect(MeterRegistry registry) {
      return new TimedAspect(registry);
   }
}

[ben-manes]

Is there a reason why AspectJ was used instead of AOP Alliance? Both are supported by Spring, but only AOP Alliance is by Guice. Spring Transactions uses AOP Alliance (TransactionInterceptor), making it easy to leverage in Guice w/o Spring IoC.