add telemetry provider configuration

Author: xinsong-cui

runtime/auth/aws-signing-default/api/aws-signing-default.api

@@ -1,4 +1,11 @@
+public final class aws/smithy/kotlin/runtime/auth/awssigning/DefaultAwsSignerBuilder {
+	public fun <init> ()V
+	public final fun build ()Laws/smithy/kotlin/runtime/auth/awssigning/AwsSigner;
+	public final fun withTelemetryProvider (Laws/smithy/kotlin/runtime/telemetry/TelemetryProvider;)Laws/smithy/kotlin/runtime/auth/awssigning/DefaultAwsSignerBuilder;
+}
+
 public final class aws/smithy/kotlin/runtime/auth/awssigning/DefaultAwsSignerKt {
+	public static final fun defaultAwsSigner (Lkotlin/jvm/functions/Function1;)Laws/smithy/kotlin/runtime/auth/awssigning/AwsSigner;
 	public static final fun getDefaultAwsSigner ()Laws/smithy/kotlin/runtime/auth/awssigning/AwsSigner;
 }
 

runtime/auth/aws-signing-default/common/src/aws/smithy/kotlin/runtime/auth/awssigning/DefaultAwsSigner.kt

@@ -4,22 +4,46 @@
  */
 package aws.smithy.kotlin.runtime.auth.awssigning
 
+import aws.smithy.kotlin.runtime.ExperimentalApi
 import aws.smithy.kotlin.runtime.http.Headers
 import aws.smithy.kotlin.runtime.http.request.HttpRequest
+import aws.smithy.kotlin.runtime.telemetry.TelemetryProvider
 import aws.smithy.kotlin.runtime.telemetry.logging.logger
 import aws.smithy.kotlin.runtime.time.TimestampFormat
 import kotlin.coroutines.coroutineContext
 
 /** The default implementation of [AwsSigner] */
 public val DefaultAwsSigner: AwsSigner = DefaultAwsSignerImpl()
 
+public fun defaultAwsSigner(block: DefaultAwsSignerBuilder.() -> Unit): AwsSigner = DefaultAwsSignerBuilder().apply(block).build()
+
+/**
+ * Builder class allows customers to configure telemetry provider for observability when using the signer as a standalone component.
+ **/
+public class DefaultAwsSignerBuilder {
+    private var telemetryProvider: TelemetryProvider? = null
+
+    public fun withTelemetryProvider(provider: TelemetryProvider) : DefaultAwsSignerBuilder = apply {
+        this.telemetryProvider = provider
+    }
+
+    public fun build(): AwsSigner {
+        return DefaultAwsSignerImpl(
+            telemetryProvider = telemetryProvider,
+        )
+    }
+}
+
+@OptIn(ExperimentalApi::class)
 internal class DefaultAwsSignerImpl(
     private val canonicalizer: Canonicalizer = Canonicalizer.Default,
     private val signatureCalculator: SignatureCalculator = SignatureCalculator.Default,
     private val requestMutator: RequestMutator = RequestMutator.Default,
+    private val telemetryProvider: TelemetryProvider? = null,
 ) : AwsSigner {
     override suspend fun sign(request: HttpRequest, config: AwsSigningConfig): AwsSigningResult<HttpRequest> {
-        val logger = coroutineContext.logger<DefaultAwsSignerImpl>()
+        val logger = telemetryProvider?.loggerProvider?.getOrCreateLogger("DefaultAwsSigner")
+            ?: coroutineContext.logger<DefaultAwsSignerImpl>()
 
         // TODO: implement SigV4a
         if (config.algorithm != AwsSigningAlgorithm.SIGV4) {
@@ -52,7 +76,8 @@ internal class DefaultAwsSignerImpl(
         prevSignature: ByteArray,
         config: AwsSigningConfig,
     ): AwsSigningResult<Unit> {
-        val logger = coroutineContext.logger<DefaultAwsSignerImpl>()
+        val logger = telemetryProvider?.loggerProvider?.getOrCreateLogger("DefaultAwsSigner")
+            ?: coroutineContext.logger<DefaultAwsSignerImpl>()
 
         val stringToSign = signatureCalculator.chunkStringToSign(chunkBody, prevSignature, config)
         logger.trace { "Chunk string to sign:\n$stringToSign" }
@@ -70,7 +95,8 @@ internal class DefaultAwsSignerImpl(
         prevSignature: ByteArray,
         config: AwsSigningConfig,
     ): AwsSigningResult<Unit> {
-        val logger = coroutineContext.logger<DefaultAwsSignerImpl>()
+        val logger = telemetryProvider?.loggerProvider?.getOrCreateLogger("DefaultAwsSigner")
+            ?: coroutineContext.logger<DefaultAwsSignerImpl>()
 
         // FIXME - can we share canonicalization code more than we are..., also this reduce is inefficient.
         // canonicalize the headers