[CONFIGURATION] File configuration - sampler model (#3468)

Author: marcalff

sdk/include/opentelemetry/sdk/configuration/always_off_sampler_configuration.h

@@ -0,0 +1,29 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "opentelemetry/sdk/configuration/sampler_configuration.h"
+#include "opentelemetry/sdk/configuration/sampler_configuration_visitor.h"
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+// YAML-SCHEMA: schema/tracer_provider.json
+// YAML-NODE: always_off
+class AlwaysOffSamplerConfiguration : public SamplerConfiguration
+{
+public:
+  void Accept(SamplerConfigurationVisitor *visitor) const override
+  {
+    visitor->VisitAlwaysOff(this);
+  }
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/always_on_sampler_configuration.h

@@ -0,0 +1,26 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "opentelemetry/sdk/configuration/sampler_configuration.h"
+#include "opentelemetry/sdk/configuration/sampler_configuration_visitor.h"
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+// YAML-SCHEMA: schema/tracer_provider.json
+// YAML-NODE: always_on
+class AlwaysOnSamplerConfiguration : public SamplerConfiguration
+{
+public:
+  void Accept(SamplerConfigurationVisitor *visitor) const override { visitor->VisitAlwaysOn(this); }
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/jaeger_remote_sampler_configuration.h

@@ -0,0 +1,36 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include <memory>
+#include <string>
+
+#include "opentelemetry/sdk/configuration/sampler_configuration.h"
+#include "opentelemetry/sdk/configuration/sampler_configuration_visitor.h"
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+// YAML-SCHEMA: schema/tracer_provider.json
+// YAML-NODE: jaeger_remote
+class JaegerRemoteSamplerConfiguration : public SamplerConfiguration
+{
+public:
+  void Accept(SamplerConfigurationVisitor *visitor) const override
+  {
+    visitor->VisitJaegerRemote(this);
+  }
+
+  std::string endpoint;
+  std::size_t interval{0};
+  std::unique_ptr<SamplerConfiguration> initial_sampler;
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/parent_based_sampler_configuration.h

@@ -0,0 +1,37 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include <memory>
+
+#include "opentelemetry/sdk/configuration/sampler_configuration.h"
+#include "opentelemetry/sdk/configuration/sampler_configuration_visitor.h"
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+// YAML-SCHEMA: schema/tracer_provider.json
+// YAML-NODE: parent_based
+class ParentBasedSamplerConfiguration : public SamplerConfiguration
+{
+public:
+  void Accept(SamplerConfigurationVisitor *visitor) const override
+  {
+    visitor->VisitParentBased(this);
+  }
+
+  std::unique_ptr<SamplerConfiguration> root;
+  std::unique_ptr<SamplerConfiguration> remote_parent_sampled;
+  std::unique_ptr<SamplerConfiguration> remote_parent_not_sampled;
+  std::unique_ptr<SamplerConfiguration> local_parent_sampled;
+  std::unique_ptr<SamplerConfiguration> local_parent_not_sampled;
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/sampler_configuration.h

@@ -0,0 +1,33 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+class SamplerConfigurationVisitor;
+
+// YAML-SCHEMA: schema/tracer_provider.json
+// YAML-NODE: Sampler
+class SamplerConfiguration
+{
+public:
+  SamplerConfiguration()                                             = default;
+  SamplerConfiguration(SamplerConfiguration &&)                      = default;
+  SamplerConfiguration(const SamplerConfiguration &)                 = default;
+  SamplerConfiguration &operator=(SamplerConfiguration &&)           = default;
+  SamplerConfiguration &operator=(const SamplerConfiguration &other) = default;
+  virtual ~SamplerConfiguration()                                    = default;
+
+  virtual void Accept(SamplerConfigurationVisitor *visitor) const = 0;
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/sampler_configuration_visitor.h

@@ -0,0 +1,41 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+class AlwaysOffSamplerConfiguration;
+class AlwaysOnSamplerConfiguration;
+class JaegerRemoteSamplerConfiguration;
+class ParentBasedSamplerConfiguration;
+class TraceIdRatioBasedSamplerConfiguration;
+class ExtensionSamplerConfiguration;
+
+class SamplerConfigurationVisitor
+{
+public:
+  SamplerConfigurationVisitor()                                                    = default;
+  SamplerConfigurationVisitor(SamplerConfigurationVisitor &&)                      = default;
+  SamplerConfigurationVisitor(const SamplerConfigurationVisitor &)                 = default;
+  SamplerConfigurationVisitor &operator=(SamplerConfigurationVisitor &&)           = default;
+  SamplerConfigurationVisitor &operator=(const SamplerConfigurationVisitor &other) = default;
+  virtual ~SamplerConfigurationVisitor()                                           = default;
+
+  virtual void VisitAlwaysOff(const AlwaysOffSamplerConfiguration *model)                 = 0;
+  virtual void VisitAlwaysOn(const AlwaysOnSamplerConfiguration *model)                   = 0;
+  virtual void VisitJaegerRemote(const JaegerRemoteSamplerConfiguration *model)           = 0;
+  virtual void VisitParentBased(const ParentBasedSamplerConfiguration *model)             = 0;
+  virtual void VisitTraceIdRatioBased(const TraceIdRatioBasedSamplerConfiguration *model) = 0;
+  virtual void VisitExtension(const ExtensionSamplerConfiguration *model)                 = 0;
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE

sdk/include/opentelemetry/sdk/configuration/trace_id_ratio_based_sampler_configuration.h

@@ -0,0 +1,31 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "opentelemetry/sdk/configuration/sampler_configuration.h"
+#include "opentelemetry/sdk/configuration/sampler_configuration_visitor.h"
+#include "opentelemetry/version.h"
+
+OPENTELEMETRY_BEGIN_NAMESPACE
+namespace sdk
+{
+namespace configuration
+{
+
+// YAML-SCHEMA: schema/tracer_provider.json
+// YAML-NODE: trace_id_ratio_based
+class TraceIdRatioBasedSamplerConfiguration : public SamplerConfiguration
+{
+public:
+  void Accept(SamplerConfigurationVisitor *visitor) const override
+  {
+    visitor->VisitTraceIdRatioBased(this);
+  }
+
+  double ratio{0.0};
+};
+
+}  // namespace configuration
+}  // namespace sdk
+OPENTELEMETRY_END_NAMESPACE