[CONFIGURATION] File configuration - metric aggregation model

sdk/include/opentelemetry/sdk/configuration/aggregation_configuration.h

@@ -0,0 +1,32 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+class AggregationConfigurationVisitor;
+
+// YAML-SCHEMA: schema/meter_provider.json
+// YAML-NODE: aggregation
+class AggregationConfiguration
+{
+public:
+  AggregationConfiguration()                                                 = default;
+  AggregationConfiguration(AggregationConfiguration &&)                      = default;
+  AggregationConfiguration(const AggregationConfiguration &)                 = default;
+  AggregationConfiguration &operator=(AggregationConfiguration &&)           = default;
+  AggregationConfiguration &operator=(const AggregationConfiguration &other) = default;
+  virtual ~AggregationConfiguration()                                        = default;
+
+  virtual void Accept(AggregationConfigurationVisitor *visitor) const = 0;
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/aggregation_configuration_visitor.h

@@ -0,0 +1,44 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+class Base2ExponentialBucketHistogramAggregationConfiguration;
+class DefaultAggregationConfiguration;
+class DropAggregationConfiguration;
+class ExplicitBucketHistogramAggregationConfiguration;
+class LastValueAggregationConfiguration;
+class SumAggregationConfiguration;
+
+class AggregationConfigurationVisitor
+{
+public:
+  AggregationConfigurationVisitor()                                              = default;
+  AggregationConfigurationVisitor(AggregationConfigurationVisitor &&)            = default;
+  AggregationConfigurationVisitor(const AggregationConfigurationVisitor &)       = default;
+  AggregationConfigurationVisitor &operator=(AggregationConfigurationVisitor &&) = default;
+  AggregationConfigurationVisitor &operator=(const AggregationConfigurationVisitor &other) =
+      default;
+  virtual ~AggregationConfigurationVisitor() = default;
+
+  virtual void VisitBase2ExponentialBucketHistogram(
+      const Base2ExponentialBucketHistogramAggregationConfiguration *model) = 0;
+  virtual void VisitDefault(const DefaultAggregationConfiguration *model)   = 0;
+  virtual void VisitDrop(const DropAggregationConfiguration *model)         = 0;
+  virtual void VisitExplicitBucketHistogram(
+      const ExplicitBucketHistogramAggregationConfiguration *model)           = 0;
+  virtual void VisitLastValue(const LastValueAggregationConfiguration *model) = 0;
+  virtual void VisitSum(const SumAggregationConfiguration *model)             = 0;
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/base2_exponential_bucket_histogram_aggregation_configuration.h

@@ -0,0 +1,33 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "opentelemetry/sdk/configuration/aggregation_configuration.h"
+#include "opentelemetry/sdk/configuration/aggregation_configuration_visitor.h"
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+// YAML-SCHEMA: schema/meter_provider.json
+// YAML-NODE: base2_exponential_bucket_histogram
+class Base2ExponentialBucketHistogramAggregationConfiguration : public AggregationConfiguration
+{
+public:
+  void Accept(AggregationConfigurationVisitor *visitor) const override
+  {
+    visitor->VisitBase2ExponentialBucketHistogram(this);
+  }
+
+  std::size_t max_scale{0};
+  std::size_t max_size{0};
+  bool record_min_max{false};
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/default_aggregation_configuration.h

@@ -0,0 +1,29 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "opentelemetry/sdk/configuration/aggregation_configuration.h"
+#include "opentelemetry/sdk/configuration/aggregation_configuration_visitor.h"
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+// YAML-SCHEMA: schema/meter_provider.json
+// YAML-NODE: default
+class DefaultAggregationConfiguration : public AggregationConfiguration
+{
+public:
+  void Accept(AggregationConfigurationVisitor *visitor) const override
+  {
+    visitor->VisitDefault(this);
+  }
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/default_histogram_aggregation.h

@@ -0,0 +1,24 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include <cstdint>
+
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+enum enum_default_histogram_aggregation : std::uint8_t
+{
+  explicit_bucket_histogram,
+  base2_exponential_bucket_histogram
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/drop_aggregation_configuration.h

@@ -0,0 +1,26 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "opentelemetry/sdk/configuration/aggregation_configuration.h"
+#include "opentelemetry/sdk/configuration/aggregation_configuration_visitor.h"
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+// YAML-SCHEMA: schema/meter_provider.json
+// YAML-NODE: drop
+class DropAggregationConfiguration : public AggregationConfiguration
+{
+public:
+  void Accept(AggregationConfigurationVisitor *visitor) const override { visitor->VisitDrop(this); }
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/explicit_bucket_histogram_aggregation_configuration.h

@@ -0,0 +1,34 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include <vector>
+
+#include "opentelemetry/sdk/configuration/aggregation_configuration.h"
+#include "opentelemetry/sdk/configuration/aggregation_configuration_visitor.h"
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+// YAML-SCHEMA: schema/meter_provider.json
+// YAML-NODE: explicit_bucket_histogram
+class ExplicitBucketHistogramAggregationConfiguration : public AggregationConfiguration
+{
+public:
+  void Accept(AggregationConfigurationVisitor *visitor) const override
+  {
+    visitor->VisitExplicitBucketHistogram(this);
+  }
+
+  std::vector<double> boundaries;
+  bool record_min_max{false};
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/instrument_type.h

@@ -0,0 +1,30 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include <cstdint>
+
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+// YAML-SCHEMA: schema/meter_provider.json
+// YAML-NODE: InstrumentType
+enum class InstrumentType : std::uint8_t
+{
+  counter,
+  histogram,
+  observable_counter,
+  observable_gauge,
+  observable_up_down_counter,
+  up_down_counter
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/last_value_aggregation_configuration.h

@@ -0,0 +1,29 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "opentelemetry/sdk/configuration/aggregation_configuration.h"
+#include "opentelemetry/sdk/configuration/aggregation_configuration_visitor.h"
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+// YAML-SCHEMA: schema/meter_provider.json
+// YAML-NODE: last_value
+class LastValueAggregationConfiguration : public AggregationConfiguration
+{
+public:
+  void Accept(AggregationConfigurationVisitor *visitor) const override
+  {
+    visitor->VisitLastValue(this);
+  }
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/meter_provider_configuration.h

@@ -0,0 +1,32 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include <memory>
+#include <vector>
+
+#include "opentelemetry/sdk/configuration/metric_reader_configuration.h"
+#include "opentelemetry/sdk/configuration/view_configuration.h"
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+// YAML-SCHEMA: schema/meter_provider.json
+// YAML-NODE: MeterProvider
+class MeterProviderConfiguration
+{
+public:
+  std::vector<std::unique_ptr<MetricReaderConfiguration>> readers;
+  std::vector<std::unique_ptr<ViewConfiguration>> views;
+  // FIXME: exemplar_filter
+  // FIXME: meter_configurator
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/otlp_file_push_metric_exporter_configuration.h

@@ -29,8 +29,9 @@ class OtlpFilePushMetricExporterConfiguration : public PushMetricExporterConfigu
   }
 
   std::string output_stream;
-  enum_temporality_preference temporality_preference{cumulative};
-  enum_default_histogram_aggregation default_histogram_aggregation{explicit_bucket_histogram};
+  TemporalityPreference temporality_preference{TemporalityPreference::cumulative};
+  DefaultHistogramAggregation default_histogram_aggregation{
+      DefaultHistogramAggregation::explicit_bucket_histogram};
 };
 
 }  // namespace configuration

sdk/include/opentelemetry/sdk/configuration/otlp_grpc_push_metric_exporter_configuration.h

@@ -38,8 +38,9 @@ class OtlpGrpcPushMetricExporterConfiguration : public PushMetricExporterConfigu
   std::string compression;
   std::size_t timeout{0};
   bool insecure{false};
-  enum_temporality_preference temporality_preference{cumulative};
-  enum_default_histogram_aggregation default_histogram_aggregation{explicit_bucket_histogram};
+  TemporalityPreference temporality_preference{TemporalityPreference::cumulative};
+  DefaultHistogramAggregation default_histogram_aggregation{
+      DefaultHistogramAggregation::explicit_bucket_histogram};
 };
 
 }  // namespace configuration

sdk/include/opentelemetry/sdk/configuration/otlp_http_push_metric_exporter_configuration.h

@@ -38,9 +38,10 @@ class OtlpHttpPushMetricExporterConfiguration : public PushMetricExporterConfigu
   std::string headers_list;
   std::string compression;
   std::size_t timeout{0};
-  enum_otlp_http_encoding encoding{protobuf};
-  enum_temporality_preference temporality_preference{cumulative};
-  enum_default_histogram_aggregation default_histogram_aggregation{explicit_bucket_histogram};
+  OtlpHttpEncoding encoding{OtlpHttpEncoding::protobuf};
+  TemporalityPreference temporality_preference{TemporalityPreference::cumulative};
+  DefaultHistogramAggregation default_histogram_aggregation{
+      DefaultHistogramAggregation::explicit_bucket_histogram};
 };
 
 }  // namespace configuration

sdk/include/opentelemetry/sdk/configuration/sum_aggregation_configuration.h

@@ -0,0 +1,26 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "opentelemetry/sdk/configuration/aggregation_configuration.h"
+#include "opentelemetry/sdk/configuration/aggregation_configuration_visitor.h"
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+// YAML-SCHEMA: schema/meter_provider.json
+// YAML-NODE: sum
+class SumAggregationConfiguration : public AggregationConfiguration
+{
+public:
+  void Accept(AggregationConfigurationVisitor *visitor) const override { visitor->VisitSum(this); }
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/temporality_preference.h

@@ -13,7 +13,9 @@ namespace sdk
 namespace configuration
 {
 
-enum enum_temporality_preference : std::uint8_t
+// YAML-SCHEMA: schema/meter_provider.json
+// YAML-NODE: ExporterTemporalityPreference
+enum class TemporalityPreference : std::uint8_t
 {
   cumulative,
   delta,