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Options used to configure the tracing client.\n * @returns - An instance of {@link TracingClient}.\n */\nexport function createTracingClient(options: TracingClientOptions): TracingClient {\n const { namespace, packageName, packageVersion } = options;\n\n function startSpan<Options extends { tracingOptions?: OperationTracingOptions }>(\n name: string,\n operationOptions?: Options,\n spanOptions?: TracingSpanOptions,\n ): {\n span: TracingSpan;\n updatedOptions: OptionsWithTracingContext<Options>;\n } {\n const startSpanResult = getInstrumenter().startSpan(name, {\n ...spanOptions,\n packageName: packageName,\n packageVersion: packageVersion,\n tracingContext: operationOptions?.tracingOptions?.tracingContext,\n });\n let tracingContext = startSpanResult.tracingContext;\n const span = startSpanResult.span;\n if (!tracingContext.getValue(knownContextKeys.namespace)) {\n tracingContext = tracingContext.setValue(knownContextKeys.namespace, namespace);\n }\n span.setAttribute(\"az.namespace\", tracingContext.getValue(knownContextKeys.namespace));\n const updatedOptions: OptionsWithTracingContext<Options> = Object.assign({}, operationOptions, {\n tracingOptions: { ...operationOptions?.tracingOptions, tracingContext },\n });\n\n return {\n span,\n updatedOptions,\n };\n }\n\n async function withSpan<\n Options extends { tracingOptions?: OperationTracingOptions },\n Callback extends (\n updatedOptions: Options,\n span: Omit<TracingSpan, \"end\">,\n ) => ReturnType<Callback>,\n >(\n name: string,\n operationOptions: Options,\n callback: Callback,\n spanOptions?: TracingSpanOptions,\n ): Promise<Resolved<ReturnType<Callback>>> {\n const { span, updatedOptions } = startSpan(name, operationOptions, spanOptions);\n try {\n const result = await withContext(updatedOptions.tracingOptions.tracingContext, () =>\n Promise.resolve(callback(updatedOptions, span)),\n );\n span.setStatus({ status: \"success\" });\n return result as ReturnType<typeof withSpan>;\n } catch (err: any) {\n span.setStatus({ status: \"error\", error: err });\n throw err;\n } finally {\n span.end();\n }\n }\n\n function withContext<\n CallbackArgs extends unknown[],\n Callback extends (...args: CallbackArgs) => ReturnType<Callback>,\n >(\n context: TracingContext,\n callback: Callback,\n ...callbackArgs: CallbackArgs\n ): ReturnType<Callback> {\n return getInstrumenter().withContext(context, callback, ...callbackArgs);\n }\n\n /**\n * Parses a traceparent header value into a span identifier.\n *\n * @param traceparentHeader - The traceparent header to parse.\n * @returns An implementation-specific identifier for the span.\n */\n function parseTraceparentHeader(traceparentHeader: string): TracingContext | undefined {\n return getInstrumenter().parseTraceparentHeader(traceparentHeader);\n }\n\n /**\n * Creates a set of request headers to propagate tracing information to a backend.\n *\n * @param tracingContext - The context containing the span to serialize.\n * @returns The set of headers to add to a request.\n */\n function createRequestHeaders(tracingContext?: TracingContext): Record<string, string> {\n return getInstrumenter().createRequestHeaders(tracingContext);\n }\n\n return {\n startSpan,\n withSpan,\n withContext,\n parseTraceparentHeader,\n createRequestHeaders,\n };\n}\n"]}
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