hexencode identifiers in lower char for w3c propagation (#985)

pnerg · pnerg · commit af4c45d19ef0 · 2021-04-07T18:00:08.000+02:00
diff --git a/core/kamon-core/src/main/scala/kamon/trace/SpanPropagation.scala b/core/kamon-core/src/main/scala/kamon/trace/SpanPropagation.scala
@@ -102,7 +102,7 @@ object W3CTraceContext {
   def encodeTraceParent(parent: Span): String = {
     def idToHex(identifier: Identifier, length: Int): String = {
       val leftPad = (string: String) => "0" * (length - string.length) + string
-      leftPad(identifier.bytes.map("%02X" format _).mkString)
+      leftPad(identifier.bytes.map("%02x" format _).mkString)
     }
 
     val samplingDecision = if (parent.trace.samplingDecision == SamplingDecision.Sample) "01" else "00"

Original file line number	Diff line number	Diff line change
`@@ -102,7 +102,7 @@ object W3CTraceContext {`
`102`	`102`	`def encodeTraceParent(parent: Span): String = {`
`103`	`103`	`def idToHex(identifier: Identifier, length: Int): String = {`
`104`	`104`	`val leftPad = (string: String) => "0" * (length - string.length) + string`
`105`		`- leftPad(identifier.bytes.map("%02X" format _).mkString)`
	`105`	`+ leftPad(identifier.bytes.map("%02x" format _).mkString)`
`106`	`106`	`}`
`107`	`107`
`108`	`108`	`val samplingDecision = if (parent.trace.samplingDecision == SamplingDecision.Sample) "01" else "00"`