move the AWS SDK context key/attribute initialization to a companion object

Author: ivantopo

instrumentation/kamon-aws-sdk/src/main/scala/kamon/instrumentation/aws/sdk/AwsSdkClientExecutionInterceptor.scala

@@ -28,7 +28,7 @@ import software.amazon.awssdk.core.interceptor.{Context, ExecutionAttribute, Exe
   * included in the "software/amazon/awssdk/global/handlers/execution.interceptors" file shipped with this module.
   */
 class AwsSdkClientExecutionInterceptor extends ExecutionInterceptor {
-  private val ClientSpanAttribute = new ExecutionAttribute[Span]("SdkClientSpan")
+  import AwsSdkClientExecutionInterceptor.ClientSpanAttribute
 
   override def afterMarshalling(context: Context.AfterMarshalling, executionAttributes: ExecutionAttributes): Unit = {
     val operationName = executionAttributes.getAttribute(SdkExecutionAttribute.OPERATION_NAME)
@@ -55,4 +55,8 @@ class AwsSdkClientExecutionInterceptor extends ExecutionInterceptor {
       kamonSpan.fail(context.exception()).finish()
     }
   }
+}
+
+object AwsSdkClientExecutionInterceptor {
+  private val ClientSpanAttribute = new ExecutionAttribute[Span]("SdkClientSpan")
 }

instrumentation/kamon-aws-sdk/src/main/scala/kamon/instrumentation/aws/sdk/AwsSdkRequestHandler.scala

@@ -29,7 +29,7 @@ import kamon.trace.Span
   * included in the "software/amazon/awssdk/global/handlers/execution.interceptors" file shipped with this module.
   */
 class AwsSdkRequestHandler extends RequestHandler2 {
-  val SpanContextKey = new HandlerContextKey[Span](classOf[Span].getName)
+  import AwsSdkRequestHandler.SpanContextKey
 
   override def beforeRequest(request: Request[_]): Unit = {
     val serviceName = request.getServiceName
@@ -66,4 +66,8 @@ class AwsSdkRequestHandler extends RequestHandler2 {
         .finish()
     }
   }
+}
+
+object AwsSdkRequestHandler {
+  private val SpanContextKey = new HandlerContextKey[Span](classOf[Span].getName)
 }