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zio · May 20, 2023 · f871fb7 · f871fb7
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diff --git a/docs/opentelemetry-example.md b/docs/opentelemetry-example.md
@@ -3,7 +3,7 @@ id: opentelemetry-example
 title: "OpenTelemetry Example"
 ---
 
-You can find the source code [here](https://github.com/zio/zio-telemetry/tree/series/2.x/opentracing-example).
+You can find the source code [here](https://github.com/zio/zio-telemetry/tree/series/2.x/opentelemtry-example).
 
 For an explanation in more detail, check the [OpenTracing Example](opentracing-example.md).
 

diff --git a/docs/opentelemetry-instrumentation-example.md b/docs/opentelemetry-instrumentation-example.md
@@ -3,6 +3,8 @@ id: opentelemetry-instrumentation-example
 title: "OpenTelemetry Automatic Instrumentation Example"
 ---
 
+You can find the source code [here](https://github.com/zio/zio-telemetry/tree/series/2.x/opentelemetry-instrumentation-example).
+
 Firstly, download OpenTelemetry JVM agent JAR:
 ```bash
 OTEL_AGENT_PATH=$(cs fetch --classpath "io.opentelemetry.javaagent:opentelemetry-javaagent:latest.release")

diff --git a/docs/opentelemetry.md b/docs/opentelemetry.md
@@ -66,19 +66,22 @@ import zio._
   ZIO.serviceWithZIO[Baggage] { baggage => 
     val carrier = OutgoingContextCarrier.default()
 
-    for {
+    val upstream = for {
       // add new key/value into the baggage of current tracing context
       _ <- baggage.set("zio", "telemetry")
       // import current baggage data into carrier so it can be used by downstream consumer
       _ <- baggage.inject(BaggagePropagator.default, carrier)
     } yield ()
 
-    for {
+    val downstream = for {
       // extract current baggage data from the carrier
       _    <- baggage.extract(BaggagePropagator.default, IncomingContextCarrier.default(carrier.kernel))  
       // get value from the extracted baggage
       data <- baggage.get("zio")
     } yield data
+
+    upstream *> downstream
+
   }.provide(Baggage.live, ContextStorage.fiberRef)
 ```
 
@@ -99,9 +102,15 @@ ZIO.serviceWithZIO[Tracing] { tracing =>
   val propagator = TraceContextPropagator.default
   val kernel     = mutable.Map().empty
 
-  tracing.inject(propagator, OutgoingContextCarrier.default(kernel)) @@ root("span of upstream service") *>
+  val upstream =
+    tracing.inject(propagator, OutgoingContextCarrier.default(kernel)) @@ root("span of upstream service")
+
+  val downstream =
     extractSpan(propagator, IncomingContextCarrier.default(kernel), "span of downstream service")
-}
+
+  upstream *> downstream
+
+}.provide(Tracing.live, ContextStorage.fiberRef, JaegerTracer.live)
 ```
 
 ### Usage with OpenTelemetry automatic instrumentation
@@ -115,7 +124,7 @@ Since [version 1.25.0](https://github.com/open-telemetry/opentelemetry-java-inst
 OpenTelemetry JVM agent supports ZIO.
 
 To enable interoperability between automatic instrumentation and `zio-opentelemetry`, `Tracing` has to be created
-using `ContextStorage` backed by OpenTelemetry's `Context`.
+using `ContextStorage` backed by OpenTelemetry's `Context` and `Tracer` provided by globally registered `TracerProvider`.
 
 ```scala
 import zio.telemetry.opentelemetry.tracing.Tracing
@@ -132,7 +141,7 @@ val app =
     ZIO.logInfo("Hello") @@ root("root span", SpanKind.INTERNAL, errorMapper)
   }.provide(
     Tracing.live,
-    ContextStorage.openTelemetryContext, // <<<
-    JaegerTracer.live
+    ContextStorage.openTelemetryContext, // <<< ContextStorage
+    ZLayer.fromZIO(ZIO.attempt(GlobalOpenTelemetry.getTracer("hello"))) // <<< Tracer
   )
 ```
diff --git a/...xample/src/main/scala/zio/telemetry/opentelemetry/instrumentation/example/ClientApp.scala b/...xample/src/main/scala/zio/telemetry/opentelemetry/instrumentation/example/ClientApp.scala
@@ -5,11 +5,13 @@ import zio.config.magnolia.descriptor
 import zio.config.typesafe.TypesafeConfig
 import zio.telemetry.opentelemetry.instrumentation.example.config.AppConfig
 import zio._
+import zio.config.ReadError
 import zio.telemetry.opentelemetry.instrumentation.example.http.HttpClient
 
 object ClientApp extends ZIOAppDefault {
 
-  private val configLayer = TypesafeConfig.fromResourcePath(descriptor[AppConfig])
+  private val configLayer: Layer[ReadError[String], AppConfig] =
+    TypesafeConfig.fromResourcePath(descriptor[AppConfig])
 
   private val httpBackendLayer: TaskLayer[Backend] =
     ZLayer.scoped {

diff --git a/...xample/src/main/scala/zio/telemetry/opentelemetry/instrumentation/example/ServerApp.scala b/...xample/src/main/scala/zio/telemetry/opentelemetry/instrumentation/example/ServerApp.scala
@@ -1,7 +1,9 @@
 package zio.telemetry.opentelemetry.instrumentation.example
 
 import io.opentelemetry.api.GlobalOpenTelemetry
+import io.opentelemetry.api.trace.Tracer
 import zio._
+import zio.config.ReadError
 import zio.config.typesafe.TypesafeConfig
 import zio.config.magnolia._
 import zio.telemetry.opentelemetry.context.ContextStorage
@@ -11,10 +13,13 @@ import zio.telemetry.opentelemetry.tracing.Tracing
 
 object ServerApp extends ZIOAppDefault {
 
-  private val configLayer = TypesafeConfig.fromResourcePath(descriptor[AppConfig])
+  private val configLayer: Layer[ReadError[String], AppConfig] =
+    TypesafeConfig.fromResourcePath(descriptor[AppConfig])
 
-  private val globalTracerLayer =
-    ZLayer.succeed(GlobalOpenTelemetry.getTracer("zio.telemetry.opentelemetry.instrumentation.example.ServerApp"))
+  private val globalTracerLayer: TaskLayer[Tracer] =
+    ZLayer.fromZIO(
+      ZIO.attempt(GlobalOpenTelemetry.getTracer("zio.telemetry.opentelemetry.instrumentation.example.ServerApp"))
+    )
 
   override def run: Task[ExitCode] =
     ZIO

diff --git a/project/Dependencies.scala b/project/Dependencies.scala
@@ -92,10 +92,7 @@ object Dependencies {
   )
 
   lazy val opentelemetryInstrumentationExample = example ++ Seq(
-    Orgs.softwaremillSttpClient3 %% "zio"                           % ExampleVersions.sttp3,
-    Orgs.opentelemetry            % "opentelemetry-exporter-jaeger" % Versions.opentelemetry,
-    Orgs.opentelemetry            % "opentelemetry-sdk"             % Versions.opentelemetry,
-    Orgs.grpc                     % "grpc-netty-shaded"             % ExampleVersions.grpcNetty
+    Orgs.softwaremillSttpClient3 %% "zio" % ExampleVersions.sttp3
   )
 
 }