Jstjohn/google stackdriver trace (#64)v1.0.1

Add app-level tracing to driver-core (https://www.pivotaltracker.com/story/show/151100422)

1 files changed, 17 insertions, 0 deletions

diff --git a/src/main/scala/xyz/driver/core/trace/ServiceTracer.scala b/src/main/scala/xyz/driver/core/trace/ServiceTracer.scala
new file mode 100644
index 0000000..25562cd
--- /dev/null
+++ b/src/main/scala/xyz/driver/core/trace/ServiceTracer.scala
@@ -0,0 +1,17 @@
+package xyz.driver.core.trace
+
+import akka.http.scaladsl.model.HttpRequest
+import akka.http.scaladsl.model.headers.RawHeader
+
+trait CanMakeHeader {
+  def header: RawHeader
+}
+
+trait ServiceTracer {
+
+  type TracerSpanPayload <: CanMakeHeader
+
+  def startSpan(httpRequest: HttpRequest): TracerSpanPayload
+
+  def endSpan(span: TracerSpanPayload): Unit
+}