1 files changed, 31 insertions, 0 deletions
diff --git a/kamon-core/src/main/resources/reference.conf b/kamon-core/src/main/resources/reference.conf
index cd8fa379..cc4da03e 100644
--- a/kamon-core/src/main/resources/reference.conf
+++ b/kamon-core/src/main/resources/reference.conf
@@ -107,6 +107,37 @@ kamon {
       # Probability of a span being sampled. Must be a value between 0 and 1.
       probability = 0.01
     }
+
+    # The IdentityProvider used to generate Trace and Span Identifiers in Kamon. There are two default implementations
+    # that ship with Kamon:
+    #   - kamon.trace.IdentityProvider.Default: Creates 8-byte identifiers for both Traces and Spans.
+    #   - kamon.trace.IdentityProvider.DoubleSizeTraceID: Creates 16-byte identifiers for Traces and 8-byte identifiers
+    #     for Spans.
+    #
+    # Any external implementation can be configured here, as long as it can be instantiated with a parameterless constructor.
+    identity-provider = "kamon.trace.IdentityProvider.Default"
+
+    # The SpanContextCodecs are used to encode/decode the SpanContext data into simple TextMaps, HTTP Headers or Binary
+    # carriers. The decision about which one to use is based on the kamon.trace.SpanContextCodec.Format instance passed
+    # to inject/extract calls.
+    #
+    # Any external implementation can be configured here, as long as it can be instantiated with a single parameter
+    # constructor that accepts a IdentityProvider.
+    span-context-codec {
+
+      # Encodes/Decodes the SpanContext data using a simple key/value pair. Since this is very rarely going to be used
+      # we default to using the same codec for HTTP Headers, as it is built on top of a TextMap.
+      text-map = "kamon.trace.SpanContextCodec.ExtendedB3"
+
+      # Encodes/Decodes the SpanContext into a TextMap with HTTP Header friendly, URLEncoded values. The default
+      # implementation follows the guidelines of B3 propagation. See more at https://github.com/openzipkin/b3-propagation.
+      http-headers = "kamon.trace.SpanContextCodec.ExtendedB3"
+
+      # Encodes/Decodes the SpanContext using a binary representation.
+      binary = "TODO"
+    }
+
+
   }
 
   util {