Trait-based initialization and other utilities

Adds the concept of a 'platform', a centralized place in which
environment-specific information will be managed, and provides common
initialization logic for most "standard" apps.

As part of the common initialization, other parts of core have also
been reworked:

- HTTP-related unmarshallers and path matchers have been factored out
  from core.json to a new core.rest.directives package (core.json
  extends those unmarshallers and matchers for backwards
  compatibility)

- CORS handling has also been moved to a dedicated utility trait

- Some custom headers have been moved from raw headers to typed ones
  in core.rest.headers

- The concept of a "reporter" has been introduced. A reporter is a
  context-aware combination of tracing and logging. It is intended to
  issue diagnostic messages that can be traced across service
  boundaries.

Closes #192
Closes #195

1 files changed, 4 insertions, 1 deletions

diff --git a/src/main/scala/xyz/driver/core/rest/package.scala b/src/main/scala/xyz/driver/core/rest/package.scala
index c778b62..104261a 100644
--- a/src/main/scala/xyz/driver/core/rest/package.scala
+++ b/src/main/scala/xyz/driver/core/rest/package.scala
@@ -22,6 +22,8 @@ import scala.util.Try
 
 trait Service
 
+object Service
+
 trait HttpClient {
   def makeRequest(request: HttpRequest): Future[HttpResponse]
 }
@@ -117,7 +119,8 @@ object `package` {
       "X-Content-Type-Options",
       "Strict-Transport-Security",
       AuthProvider.SetAuthenticationTokenHeader,
-      AuthProvider.SetPermissionsTokenHeader
+      AuthProvider.SetPermissionsTokenHeader,
+      "Traceparent"
     )
 
   def allowOrigin(originHeader: Option[Origin]): `Access-Control-Allow-Origin` =