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author | Kseniya Tomskikh <ktomskikh@driver.xyz> | 2018-10-17 17:02:58 +0800 |
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committer | Kseniya Tomskikh <ktomskikh@driver.xyz> | 2018-10-17 17:02:58 +0800 |
commit | 95c3aeecd7e6ad04ce8d216c09e779f5ca38aa6a (patch) | |
tree | dfc94f20d00c84f9dde120f065bfc9298bdff0dc /core-rest/src/main/scala/xyz/driver/core/rest/headers | |
parent | f5d0b038457ed9d01687f0949e22e08a6b116066 (diff) | |
parent | a43556851bf986b81351fc9f1ae5ba51bf21dc47 (diff) | |
download | driver-core-kseniya/typized-id.tar.gz driver-core-kseniya/typized-id.tar.bz2 driver-core-kseniya/typized-id.zip |
Merge branch 'master' into kseniya/typized-idkseniya/typized-id
Diffstat (limited to 'core-rest/src/main/scala/xyz/driver/core/rest/headers')
-rw-r--r-- | core-rest/src/main/scala/xyz/driver/core/rest/headers/Traceparent.scala | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/core-rest/src/main/scala/xyz/driver/core/rest/headers/Traceparent.scala b/core-rest/src/main/scala/xyz/driver/core/rest/headers/Traceparent.scala new file mode 100644 index 0000000..866476d --- /dev/null +++ b/core-rest/src/main/scala/xyz/driver/core/rest/headers/Traceparent.scala @@ -0,0 +1,33 @@ +package xyz.driver.core +package rest +package headers + +import akka.http.scaladsl.model.headers.{ModeledCustomHeader, ModeledCustomHeaderCompanion} +import xyz.driver.core.reporting.SpanContext + +import scala.util.Try + +/** Encapsulates a trace context in an HTTP header for propagation across services. + * + * This implementation corresponds to the W3C editor's draft specification (as of 2018-08-28) + * https://w3c.github.io/distributed-tracing/report-trace-context.html. The 'flags' field is + * ignored. + */ +final case class Traceparent(spanContext: SpanContext) extends ModeledCustomHeader[Traceparent] { + override def renderInRequests = true + override def renderInResponses = true + override val companion: Traceparent.type = Traceparent + override def value: String = f"01-${spanContext.traceId}-${spanContext.spanId}-00" +} +object Traceparent extends ModeledCustomHeaderCompanion[Traceparent] { + override val name = "traceparent" + override def parse(value: String) = Try { + val Array(version, traceId, spanId, _) = value.split("-") + require( + version == "01", + s"Found unsupported version '$version' in traceparent header. Only version '01' is supported.") + new Traceparent( + new SpanContext(traceId, spanId) + ) + } +} |