Lesson 35 - Get Compute Auth Token Working
This commit is contained in:
Norman Lansing
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/**
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* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
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* SPDX-License-Identifier: Apache-2.0.
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*/
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#pragma once
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#include <aws/core/monitoring/HttpClientMetrics.h>
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#include <aws/core/utils/logging/LogMacros.h>
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#include <smithy/Smithy_EXPORTS.h>
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#include <smithy/tracing/Meter.h>
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#include <functional>
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#include <chrono>
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#include <utility>
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namespace smithy {
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namespace components {
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namespace tracing {
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/**
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* A utility class for common tracing activities.
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*/
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class SMITHY_API TracingUtils {
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public:
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TracingUtils() = default;
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static const char COUNT_METRIC_TYPE[];
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static const char MICROSECOND_METRIC_TYPE[];
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static const char BYTES_PER_SECOND_METRIC_TYPE[];
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static const char SMITHY_CLIENT_DURATION_METRIC[];
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static const char SMITHY_CLIENT_ENDPOINT_RESOLUTION_METRIC[];
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static const char SMITHY_CLIENT_DESERIALIZATION_METRIC[];
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static const char SMITHY_CLIENT_SIGNING_METRIC[];
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static const char SMITHY_CLIENT_SERIALIZATION_METRIC[];
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static const char SMITHY_CLIENT_SERVICE_CALL_METRIC[];
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static const char SMITHY_CLIENT_SERVICE_BACKOFF_DELAY_METRIC[];
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static const char SMITHY_CLIENT_SERVICE_ATTEMPTS_METRIC[];
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static const char SMITHY_METHOD_AWS_VALUE[];
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static const char SMITHY_SERVICE_DIMENSION[];
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static const char SMITHY_METHOD_DIMENSION[];
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static const char SMITHY_SYSTEM_DIMENSION[];
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static const char SMITHY_METRICS_DNS_DURATION[];
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static const char SMITHY_METRICS_CONNECT_DURATION[];
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static const char SMITHY_METRICS_SSL_DURATION[];
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static const char SMITHY_METRICS_DOWNLOAD_SPEED_METRIC[];
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static const char SMITHY_METRICS_UPLOAD_SPEED_METRIC[];
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static const char SMITHY_METRICS_UNKNOWN_METRIC[];
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/**
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* Will run a function and emit the duration of that function in millisecond timing to the
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* meter provided as a Histogram metrics. Will return the result af the function.
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* @tparam T The type that is being returned from the function.
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* @param func A function that returns T.
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* @param metricName The name of the metric that is being captured by the function.
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* @param meter The meter making the measurement.
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* @param attributes The attributes or dimensions associate with this measurement.
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* @param description The description of the measurement.
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* @return the result of func.
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*/
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template<typename T>
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static T MakeCallWithTiming(std::function<T()> func,
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const Aws::String &metricName,
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const Meter &meter,
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Aws::Map<Aws::String, Aws::String>&& attributes,
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const Aws::String &description = "")
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{
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auto before = std::chrono::steady_clock::now();
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auto returnValue = func();
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auto after = std::chrono::steady_clock::now();
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auto duration = std::chrono::duration_cast<std::chrono::microseconds>(after - before).count();
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auto histogram = meter.CreateHistogram(metricName, MICROSECOND_METRIC_TYPE, description);
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if (!histogram) {
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AWS_LOG_ERROR("TracingUtil", "Failed to create histogram");
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return {};
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}
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histogram->record((double) duration, std::forward<Aws::Map<Aws::String, Aws::String>>(attributes));
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return returnValue;
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}
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/**
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* Will run a function and emit the duration of that function in millisecond timing to the
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* meter provided as a Histogram metrics.
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* @param func a function that does not return anything but will be measured.
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* @param metricName The name of the metric that is being captured by the function.
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* @param meter The meter making the measurement.
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* @param attributes The attributes or dimensions associate with this measurement.
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* @param description The description of the measurement.
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*/
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static void MakeCallWithTiming(std::function<void(void)> func,
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Aws::String metricName,
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const Meter &meter,
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Aws::Map<Aws::String, Aws::String>&& attributes,
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Aws::String description = "")
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{
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auto before = std::chrono::steady_clock::now();
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func();
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auto after = std::chrono::steady_clock::now();
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auto duration = std::chrono::duration_cast<std::chrono::microseconds>(after - before).count();
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auto histogram = meter.CreateHistogram(std::move(metricName), MICROSECOND_METRIC_TYPE, std::move(description));
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if (!histogram) {
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AWS_LOG_ERROR("TracingUtil", "Failed to create histogram");
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return;
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}
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histogram->record((double) duration, std::forward<Aws::Map<Aws::String, Aws::String>>(attributes));
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}
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/**
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* Emits http metrics to a specified meter.
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* @param metrics A http metrics collection that we will emit.
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* @param meter The meter used for metrics emissions.
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* @param attributes The attributes or dimensions associate with this measurement.
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* @param description The description of the measurement.
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*/
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static void EmitCoreHttpMetrics(const Aws::Monitoring::HttpClientMetricsCollection &metrics,
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const Meter &meter,
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Aws::Map<Aws::String, Aws::String>&& attributes,
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Aws::String description = "")
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{
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for (auto const &entry: metrics) {
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auto smithyMetric = ConvertCoreMetricToSmithy(entry.first);
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if (smithyMetric.first != SMITHY_METRICS_UNKNOWN_METRIC) {
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auto histogram = meter.CreateHistogram(std::move(smithyMetric.first),
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smithyMetric.second,
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std::move(description));
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if (!histogram) {
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AWS_LOG_ERROR("TracingUtil", "Failed to create histogram");
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}
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histogram->record((double) entry.second, attributes);
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}
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}
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}
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/**
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* Converts the string Representation of a Core metric to a smithy metric.
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* @param name the metric name.
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* @return A tuple of metric name to measurement unit.
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*/
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static std::pair<Aws::String, Aws::String> ConvertCoreMetricToSmithy(const Aws::String &name) {
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//TODO: Make static map, Aws::Map cannot be made static with a customer memory manager as of the moment.
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Aws::Map<int, std::pair<Aws::String, Aws::String>> metricsTypeToName =
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{
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std::pair<int, std::pair<Aws::String, Aws::String>>(
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static_cast<int>(Aws::Monitoring::HttpClientMetricsType::DnsLatency),
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std::make_pair(SMITHY_METRICS_DNS_DURATION, MICROSECOND_METRIC_TYPE)),
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std::pair<int, std::pair<Aws::String, Aws::String>>(
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static_cast<int>(Aws::Monitoring::HttpClientMetricsType::ConnectLatency),
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std::make_pair(SMITHY_METRICS_CONNECT_DURATION, MICROSECOND_METRIC_TYPE)),
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std::pair<int, std::pair<Aws::String, Aws::String>>(
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static_cast<int>(Aws::Monitoring::HttpClientMetricsType::SslLatency),
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std::make_pair(SMITHY_METRICS_SSL_DURATION, MICROSECOND_METRIC_TYPE)),
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std::pair<int, std::pair<Aws::String, Aws::String>>(
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static_cast<int>(Aws::Monitoring::HttpClientMetricsType::DownloadSpeed),
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std::make_pair(SMITHY_METRICS_DOWNLOAD_SPEED_METRIC, BYTES_PER_SECOND_METRIC_TYPE)),
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std::pair<int, std::pair<Aws::String, Aws::String>>(
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static_cast<int>(Aws::Monitoring::HttpClientMetricsType::UploadSpeed),
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std::make_pair(SMITHY_METRICS_UPLOAD_SPEED_METRIC, BYTES_PER_SECOND_METRIC_TYPE)),
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};
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auto metricType = Aws::Monitoring::GetHttpClientMetricTypeByName(name);
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auto it = metricsTypeToName.find(static_cast<int>(metricType));
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if (it == metricsTypeToName.end()) {
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return std::make_pair(SMITHY_METRICS_UNKNOWN_METRIC, "unknown");
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}
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return it->second;
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}
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};
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}
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}
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}
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