[CONFIGURATION] File configuration - console metric exporter

CHANGELOG.md

@@ -32,6 +32,9 @@ Increment the:
 * [BUILD] Upgrade to opentelemetry-proto 1.8.0
   [#3730](https://github.com/open-telemetry/opentelemetry-cpp/pull/3730)
 
+* [CONFIGURATION] File configuration - console metric exporter
+  [#3734](https://github.com/open-telemetry/opentelemetry-cpp/pull/3734)
+
 New Features:
 
 * [CONFIGURATION] Implement declarative configuration (config.yaml)

exporters/ostream/src/console_push_metric_builder.cc

@@ -1,6 +1,7 @@
 // Copyright The OpenTelemetry Authors
 // SPDX-License-Identifier: Apache-2.0
 
+#include <iostream>
 #include <memory>
 #include <utility>
 
@@ -9,6 +10,8 @@
 #include "opentelemetry/sdk/configuration/console_push_metric_exporter_builder.h"
 #include "opentelemetry/sdk/configuration/console_push_metric_exporter_configuration.h"
 #include "opentelemetry/sdk/configuration/registry.h"
+#include "opentelemetry/sdk/configuration/temporality_preference.h"
+#include "opentelemetry/sdk/metrics/instruments.h"
 #include "opentelemetry/sdk/metrics/push_metric_exporter.h"
 #include "opentelemetry/version.h"
 
@@ -25,10 +28,23 @@ void ConsolePushMetricBuilder::Register(opentelemetry::sdk::configuration::Regis
 }
 
 std::unique_ptr<opentelemetry::sdk::metrics::PushMetricExporter> ConsolePushMetricBuilder::Build(
-    const opentelemetry::sdk::configuration::ConsolePushMetricExporterConfiguration * /* model */)
-    const
+    const opentelemetry::sdk::configuration::ConsolePushMetricExporterConfiguration *model) const
 {
-  return OStreamMetricExporterFactory::Create();
+  sdk::metrics::AggregationTemporality aggregation_temporality;
+
+  switch (model->temporality_preference)
+  {
+    case opentelemetry::sdk::configuration::TemporalityPreference::delta:
+      aggregation_temporality = sdk::metrics::AggregationTemporality::kDelta;
+      break;
+    case opentelemetry::sdk::configuration::TemporalityPreference::cumulative:
+    case opentelemetry::sdk::configuration::TemporalityPreference::low_memory:
+    default:
+      aggregation_temporality = sdk::metrics::AggregationTemporality::kCumulative;
+      break;
+  };
+
+  return OStreamMetricExporterFactory::Create(std::cout, aggregation_temporality);
 }
 
 }  // namespace metrics

install/test/src/test_exporters_ostream_builder.cc

@@ -19,7 +19,14 @@ TEST(ExportersOstreamBuilderInstall, ConsolePushMetricBuilder)
 {
   auto builder = std::make_unique<opentelemetry::exporter::metrics::ConsolePushMetricBuilder>();
   ASSERT_TRUE(builder != nullptr);
-  auto exporter = builder->Build(nullptr);
+
+  opentelemetry::sdk::configuration::ConsolePushMetricExporterConfiguration model;
+  model.temporality_preference =
+      opentelemetry::sdk::configuration::TemporalityPreference::cumulative;
+  model.default_histogram_aggregation =
+      opentelemetry::sdk::configuration::DefaultHistogramAggregation::explicit_bucket_histogram;
+
+  auto exporter = builder->Build(&model);
   ASSERT_TRUE(exporter != nullptr);
 }
 

sdk/include/opentelemetry/sdk/configuration/console_push_metric_exporter_configuration.h

@@ -3,9 +3,11 @@
 
 #pragma once
 
+#include "opentelemetry/sdk/configuration/default_histogram_aggregation.h"
 #include "opentelemetry/sdk/configuration/headers_configuration.h"
 #include "opentelemetry/sdk/configuration/push_metric_exporter_configuration.h"
 #include "opentelemetry/sdk/configuration/push_metric_exporter_configuration_visitor.h"
+#include "opentelemetry/sdk/configuration/temporality_preference.h"
 #include "opentelemetry/version.h"
 
 OPENTELEMETRY_BEGIN_NAMESPACE
@@ -14,15 +16,19 @@ namespace sdk
 namespace configuration
 {
 
-// YAML-SCHEMA: schema/common.json
-// YAML-NODE: Console
+// YAML-SCHEMA: schema/meter_provider.json
+// YAML-NODE: ConsoleMetricExporter
 class ConsolePushMetricExporterConfiguration : public PushMetricExporterConfiguration
 {
 public:
   void Accept(PushMetricExporterConfigurationVisitor *visitor) const override
   {
     visitor->VisitConsole(this);
   }
+
+  TemporalityPreference temporality_preference{TemporalityPreference::cumulative};
+  DefaultHistogramAggregation default_histogram_aggregation{
+      DefaultHistogramAggregation::explicit_bucket_histogram};
 };
 
 }  // namespace configuration

sdk/src/configuration/configuration_parser.cc

@@ -601,11 +601,17 @@ ConfigurationParser::ParseOtlpFilePushMetricExporterConfiguration(
 
 std::unique_ptr<ConsolePushMetricExporterConfiguration>
 ConfigurationParser::ParseConsolePushMetricExporterConfiguration(
-    const std::unique_ptr<DocumentNode> & /* node */) const
+    const std::unique_ptr<DocumentNode> &node) const
 {
   auto model = std::make_unique<ConsolePushMetricExporterConfiguration>();
 
-  // FIXME-CONFIG: https://github.com/open-telemetry/opentelemetry-configuration/issues/242
+  std::string temporality_preference = node->GetString("temporality_preference", "cumulative");
+  model->temporality_preference      = ParseTemporalityPreference(node, temporality_preference);
+
+  std::string default_histogram_aggregation =
+      node->GetString("default_histogram_aggregation", "explicit_bucket_histogram");
+  model->default_histogram_aggregation =
+      ParseDefaultHistogramAggregation(node, default_histogram_aggregation);
 
   return model;
 }