Replacing Advice.class references with string construction.
This stops the JVM from loading the Advice classes which are used as templates for byte buddy and doesn't ever need to be run directly.
This eliminates ~130 class loads at start-up -- and saves 0.5MiB in metaspace
The problem was that on zulu8 loading OkHttp touches JFR which in turn
touches log manager - which would break things like JBOSS.
The fix is to delay installing agent (and writer) until log manager
things have settled down - in way similar to jmxfetch.
Unfortunately for 'main' agent this turns out to be more involved
because of classloader shenanigans.
This change is slightly breaking for existing hystrixCommand code since the resource name changes from run->execute and getFallback->fallback. The fallback span is also now a child of the execute span.
It turns out that Eclipse's OSGi implementation has two problems:
* It doesn't respect system properties by default
* It has tricky classloader implementation that loads bootstrap
classes from the classloader-has-delegation-to-bootstrap check but
doesn't load bootstrap classes from 'normal' code.
This should address second problem and make Eclipse's OSGi
implementation 'safe' by default.
dougqh
Nikolay Martynov
Tyler Benson
Laplie Anderson
Andrew Kent
Tyler Benson