! newrelic: major refactor of the newrelic reporter

Most notable changes:
  - The agent connection setup is separated from the actual metrics reporting,
    this will be important in the near future when we start sending errors too.
  - The metrics subscriptions are delayed until the connection to the agent is
    established.
  - The Tick metrics buffer is only created if necessary.
  - Introduced the kamon.newrelic.max-initialize-retries and initialize-retry-delay
    settings.
  - External service calls via HTTP clients are reported as external services.

1 files changed, 9 insertions, 4 deletions

diff --git a/kamon-newrelic/src/main/resources/reference.conf b/kamon-newrelic/src/main/resources/reference.conf
index 059420f9..c86e64ae 100644
--- a/kamon-newrelic/src/main/resources/reference.conf
+++ b/kamon-newrelic/src/main/resources/reference.conf
@@ -4,17 +4,22 @@
 
 kamon {
   newrelic {
+
+    # General ApdexT that applies to all Trace metrics reported.
     apdexT = 1 second
 
+    # The application name that will be shown in the New Relic dashboard.
     app-name = "Kamon[Development]"
-    license-key = e7d350b14228f3d28f35bc3140df2c3e565ea5d5
 
-    # delay between connection attempts to NewRelic collector
-    retry-delay = 30 seconds
+    # Your New Relic license key.
+    license-key = e7d350b14228f3d28f35bc3140df2c3e565ea5d5
 
     # attempts to send pending metrics in the next tick,
     # combining the current metrics plus the pending, after max-retry, deletes all pending metrics
-    max-retry = 3
+    max-initialize-retries = 3
+
+    # delay between connection attempts to NewRelic collector
+    initialize-retry-delay = 30 seconds
   }
 }