From aa93757d615d805a9b6c30541055601b0df22951 Mon Sep 17 00:00:00 2001
From: Ivan Topolnjak <ivantopo@gmail.com>
Date: Mon, 14 Mar 2016 21:59:02 +0100
Subject: introduce selective instrumentation for akka actors.

---
 kamon-core/src/main/scala/kamon/ModuleLoader.scala          | 2 ++
 kamon-core/src/main/scala/kamon/metric/EntityRecorder.scala | 6 ++++++
 kamon-core/src/main/scala/kamon/util/Timestamp.scala        | 6 ++++++
 3 files changed, 14 insertions(+)

(limited to 'kamon-core')

diff --git a/kamon-core/src/main/scala/kamon/ModuleLoader.scala b/kamon-core/src/main/scala/kamon/ModuleLoader.scala
index a89af19e..55874a33 100644
--- a/kamon-core/src/main/scala/kamon/ModuleLoader.scala
+++ b/kamon-core/src/main/scala/kamon/ModuleLoader.scala
@@ -46,6 +46,8 @@ private[kamon] class ModuleLoaderExtension(system: ExtendedActorSystem) extends
         case th: Throwable ⇒ log.error(s"Failed to auto start the [$name] module.", th)
       }
 
+    case other =>
+
   }
 
   // When AspectJ is present the kamon.supervisor.AspectJPresent aspect will make this return true.
diff --git a/kamon-core/src/main/scala/kamon/metric/EntityRecorder.scala b/kamon-core/src/main/scala/kamon/metric/EntityRecorder.scala
index 15e20d1a..e1e89b79 100644
--- a/kamon-core/src/main/scala/kamon/metric/EntityRecorder.scala
+++ b/kamon-core/src/main/scala/kamon/metric/EntityRecorder.scala
@@ -34,6 +34,12 @@ trait EntityRecorderFactory[T <: EntityRecorder] {
   def createRecorder(instrumentFactory: InstrumentFactory): T
 }
 
+abstract class EntityRecorderFactoryCompanion[T <: EntityRecorder](val category: String, builder: (InstrumentFactory) => T)
+    extends EntityRecorderFactory[T] {
+
+  def createRecorder(instrumentFactory: InstrumentFactory): T = builder(instrumentFactory)
+}
+
 object EntityRecorderFactory {
   def apply[T <: EntityRecorder](entityCategory: String, factory: InstrumentFactory ⇒ T): EntityRecorderFactory[T] =
     new EntityRecorderFactory[T] {
diff --git a/kamon-core/src/main/scala/kamon/util/Timestamp.scala b/kamon-core/src/main/scala/kamon/util/Timestamp.scala
index eadc6690..5a192304 100644
--- a/kamon-core/src/main/scala/kamon/util/Timestamp.scala
+++ b/kamon-core/src/main/scala/kamon/util/Timestamp.scala
@@ -59,6 +59,8 @@ object MilliTimestamp {
  *  timestamp in nanoseconds.
  */
 class NanoTimestamp(val nanos: Long) extends AnyVal {
+  def -(that: NanoTimestamp) = new NanoTimestamp(nanos - that.nanos)
+  def +(that: NanoTimestamp) = new NanoTimestamp(nanos + that.nanos)
   override def toString: String = String.valueOf(nanos) + ".nanos"
 }
 
@@ -70,6 +72,8 @@ object NanoTimestamp {
  *  Number of nanoseconds between a arbitrary origin timestamp provided by the JVM via System.nanoTime()
  */
 class RelativeNanoTimestamp(val nanos: Long) extends AnyVal {
+  def -(that: RelativeNanoTimestamp) = new RelativeNanoTimestamp(nanos - that.nanos)
+  def +(that: RelativeNanoTimestamp) = new RelativeNanoTimestamp(nanos + that.nanos)
   override def toString: String = String.valueOf(nanos) + ".nanos"
 
   def toMilliTimestamp: MilliTimestamp =
@@ -77,6 +81,8 @@ class RelativeNanoTimestamp(val nanos: Long) extends AnyVal {
 }
 
 object RelativeNanoTimestamp {
+  val zero = new RelativeNanoTimestamp(0L)
+
   def now: RelativeNanoTimestamp = new RelativeNanoTimestamp(System.nanoTime())
   def relativeTo(milliTimestamp: MilliTimestamp): RelativeNanoTimestamp =
     new RelativeNanoTimestamp(now.nanos - (MilliTimestamp.now.millis - milliTimestamp.millis) * 1000000)
-- 
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