[SDK] TracerProvider should own TracerContext, not share it

CHANGELOG.md

@@ -24,7 +24,10 @@ Increment the:
 * [SDK] MeterProvider should own MeterContext, not share it
   [#2218](https://github.com/open-telemetry/opentelemetry-cpp/pull/2218)
 
-Important changes:
+* [SDK] TracerProvider should own TracerContext, not share it
+  [#2221](https://github.com/open-telemetry/opentelemetry-cpp/pull/2221)
+
+Breaking changes:
 
 * [REMOVAL] Remove the jaeger exporter
   [#2031](https://github.com/open-telemetry/opentelemetry-cpp/pull/2031)
@@ -37,6 +40,14 @@ Important changes:
     `MeterContext`, instead of a `shared_ptr`.
   * Please adjust SDK configuration code accordingly.
 
+* [SDK] TracerProvider should own TracerContext, not share it
+  [#2221](https://github.com/open-telemetry/opentelemetry-cpp/pull/2221)
+  * The `TracerProvider` constructor now takes a `unique_ptr` on
+    `TracerContext`, instead of a `shared_ptr`.
+  * The `LoggerProvider` constructor now takes a `unique_ptr` on
+    `LoggerContext`, instead of a `shared_ptr`.
+  * Please adjust SDK configuration code accordingly.
+
 ## [1.9.1] 2023-05-26
 
 * [DEPRECATION] Drop C++11 support

examples/grpc/tracer_common.h

@@ -80,10 +80,10 @@ void InitTracer()
   std::vector<std::unique_ptr<opentelemetry::sdk::trace::SpanProcessor>> processors;
   processors.push_back(std::move(processor));
   // Default is an always-on sampler.
-  std::shared_ptr<opentelemetry::sdk::trace::TracerContext> context =
+  std::unique_ptr<opentelemetry::sdk::trace::TracerContext> context =
       opentelemetry::sdk::trace::TracerContextFactory::Create(std::move(processors));
   std::shared_ptr<opentelemetry::trace::TracerProvider> provider =
-      opentelemetry::sdk::trace::TracerProviderFactory::Create(context);
+      opentelemetry::sdk::trace::TracerProviderFactory::Create(std::move(context));
   // Set the global trace provider
   opentelemetry::trace::Provider::SetTracerProvider(provider);
 

examples/http/tracer_common.h

@@ -70,10 +70,10 @@ void InitTracer()
   std::vector<std::unique_ptr<opentelemetry::sdk::trace::SpanProcessor>> processors;
   processors.push_back(std::move(processor));
   // Default is an always-on sampler.
-  std::shared_ptr<opentelemetry::sdk::trace::TracerContext> context =
+  std::unique_ptr<opentelemetry::sdk::trace::TracerContext> context =
       opentelemetry::sdk::trace::TracerContextFactory::Create(std::move(processors));
   std::shared_ptr<opentelemetry::trace::TracerProvider> provider =
-      opentelemetry::sdk::trace::TracerProviderFactory::Create(context);
+      opentelemetry::sdk::trace::TracerProviderFactory::Create(std::move(context));
   // Set the global trace provider
   opentelemetry::trace::Provider::SetTracerProvider(provider);
 

ext/test/w3c_tracecontext_test/main.cc

@@ -55,9 +55,10 @@ void initTracer()
       new trace_sdk::SimpleSpanProcessor(std::move(exporter)));
   std::vector<std::unique_ptr<trace_sdk::SpanProcessor>> processors;
   processors.push_back(std::move(processor));
-  auto context = std::make_shared<trace_sdk::TracerContext>(std::move(processors));
-  auto provider =
-      nostd::shared_ptr<trace_api::TracerProvider>(new trace_sdk::TracerProvider(context));
+  auto context = std::unique_ptr<trace_sdk::TracerContext>(
+      new trace_sdk::TracerContext(std::move(processors)));
+  auto provider = nostd::shared_ptr<trace_api::TracerProvider>(
+      new trace_sdk::TracerProvider(std::move(context)));
   // Set the global trace provider
   trace_api::Provider::SetTracerProvider(provider);
 }

sdk/include/opentelemetry/sdk/logs/logger_context.h

@@ -9,6 +9,7 @@
 #  include <memory>
 #  include <vector>
 
+#  include "opentelemetry/sdk/logs/processor.h"
 #  include "opentelemetry/sdk/resource/resource.h"
 #  include "opentelemetry/version.h"
 
@@ -17,7 +18,6 @@ namespace sdk
 {
 namespace logs
 {
-class LogRecordProcessor;
 
 /**
  * A class which stores the LoggerContext context.
@@ -40,10 +40,10 @@ class LoggerContext
                              opentelemetry::sdk::resource::Resource::Create({})) noexcept;
 
   /**
-   * Attaches a log processor to list of configured processors to this tracer context.
+   * Attaches a log processor to list of configured processors to this logger context.
    * Processor once attached can't be removed.
    * @param processor The new log processor for this tracer. This must not be
-   * a nullptr. Ownership is given to the `TracerContext`.
+   * a nullptr. Ownership is given to the `LoggerContext`.
    *
    * Note: This method is not thread safe.
    */

sdk/include/opentelemetry/sdk/logs/logger_provider.h

@@ -56,9 +56,9 @@ class LoggerProvider final : public opentelemetry::logs::LoggerProvider
 
   /**
    * Initialize a new logger provider with a specified context
-   * @param context The shared logger configuration/pipeline for this provider.
+   * @param context The owned logger configuration/pipeline for this provider.
    */
-  explicit LoggerProvider(std::shared_ptr<sdk::logs::LoggerContext> context) noexcept;
+  explicit LoggerProvider(std::unique_ptr<LoggerContext> context) noexcept;
 
   ~LoggerProvider() override;
 
@@ -106,7 +106,7 @@ class LoggerProvider final : public opentelemetry::logs::LoggerProvider
 private:
   // order of declaration is important here - loggers should destroy only after context.
   std::vector<std::shared_ptr<opentelemetry::sdk::logs::Logger>> loggers_;
-  std::shared_ptr<sdk::logs::LoggerContext> context_;
+  std::shared_ptr<LoggerContext> context_;
   std::mutex lock_;
 };
 }  // namespace logs

sdk/include/opentelemetry/sdk/logs/logger_provider_factory.h

@@ -64,7 +64,7 @@ class OPENTELEMETRY_EXPORT LoggerProviderFactory
    * Create a LoggerProvider.
    */
   static std::unique_ptr<opentelemetry::logs::LoggerProvider> Create(
-      std::shared_ptr<sdk::logs::LoggerContext> context);
+      std::unique_ptr<LoggerContext> context);
 };
 
 }  // namespace logs

sdk/include/opentelemetry/sdk/trace/tracer_provider.h

@@ -57,9 +57,9 @@ class TracerProvider final : public opentelemetry::trace::TracerProvider
 
   /**
    * Initialize a new tracer provider with a specified context
-   * @param context The shared tracer configuration/pipeline for this provider.
+   * @param context The owned tracer configuration/pipeline for this provider.
    */
-  explicit TracerProvider(std::shared_ptr<TracerContext> context) noexcept;
+  explicit TracerProvider(std::unique_ptr<TracerContext> context) noexcept;
 
   ~TracerProvider() override;
 

sdk/include/opentelemetry/sdk/trace/tracer_provider_factory.h

@@ -78,7 +78,7 @@ class OPENTELEMETRY_EXPORT TracerProviderFactory
   /* Create with a tracer context. */
 
   static std::unique_ptr<opentelemetry::trace::TracerProvider> Create(
-      std::shared_ptr<TracerContext> context);
+      std::unique_ptr<TracerContext> context);
 };
 
 }  // namespace trace

sdk/src/logs/logger_provider.cc

@@ -24,29 +24,27 @@ LoggerProvider::LoggerProvider(std::unique_ptr<LogRecordProcessor> &&processor,
 {
   std::vector<std::unique_ptr<LogRecordProcessor>> processors;
   processors.emplace_back(std::move(processor));
-  context_ = std::make_shared<sdk::logs::LoggerContext>(std::move(processors), std::move(resource));
+  context_ = std::make_shared<LoggerContext>(std::move(processors), std::move(resource));
   OTEL_INTERNAL_LOG_DEBUG("[LoggerProvider] LoggerProvider created.");
 }
 
 LoggerProvider::LoggerProvider(std::vector<std::unique_ptr<LogRecordProcessor>> &&processors,
                                opentelemetry::sdk::resource::Resource resource) noexcept
-    : context_{
-          std::make_shared<sdk::logs::LoggerContext>(std::move(processors), std::move(resource))}
+    : context_{std::make_shared<LoggerContext>(std::move(processors), std::move(resource))}
 {}
 
 LoggerProvider::LoggerProvider() noexcept
-    : context_{std::make_shared<sdk::logs::LoggerContext>(
-          std::vector<std::unique_ptr<LogRecordProcessor>>{})}
+    : context_{std::make_shared<LoggerContext>(std::vector<std::unique_ptr<LogRecordProcessor>>{})}
 {}
 
-LoggerProvider::LoggerProvider(std::shared_ptr<sdk::logs::LoggerContext> context) noexcept
-    : context_{context}
+LoggerProvider::LoggerProvider(std::unique_ptr<LoggerContext> context) noexcept
+    : context_(std::move(context))
 {}
 
 LoggerProvider::~LoggerProvider()
 {
   // Logger hold the shared pointer to the context. So we can not use destructor of LoggerContext to
-  // Shutdown and flush all pending recordables when we hasve more than one loggers.These
+  // Shutdown and flush all pending recordables when we have more than one loggers. These
   // recordables may use the raw pointer of instrumentation_scope_ in Logger
   if (context_)
   {

sdk/src/logs/logger_provider_factory.cc

@@ -4,6 +4,7 @@
 #ifdef ENABLE_LOGS_PREVIEW
 
 #  include "opentelemetry/sdk/logs/logger_provider_factory.h"
+#  include "opentelemetry/sdk/logs/logger_context.h"
 #  include "opentelemetry/sdk/logs/logger_provider.h"
 #  include "opentelemetry/sdk/resource/resource.h"
 
@@ -46,9 +47,10 @@ std::unique_ptr<opentelemetry::logs::LoggerProvider> LoggerProviderFactory::Crea
 }
 
 std::unique_ptr<opentelemetry::logs::LoggerProvider> LoggerProviderFactory::Create(
-    std::shared_ptr<sdk::logs::LoggerContext> context)
+    std::unique_ptr<LoggerContext> context)
 {
-  std::unique_ptr<opentelemetry::logs::LoggerProvider> provider(new LoggerProvider(context));
+  std::unique_ptr<opentelemetry::logs::LoggerProvider> provider(
+      new LoggerProvider(std::move(context)));
   return provider;
 }
 

sdk/src/trace/tracer_provider.cc

@@ -16,8 +16,8 @@ namespace trace
 namespace resource  = opentelemetry::sdk::resource;
 namespace trace_api = opentelemetry::trace;
 
-TracerProvider::TracerProvider(std::shared_ptr<sdk::trace::TracerContext> context) noexcept
-    : context_{context}
+TracerProvider::TracerProvider(std::unique_ptr<TracerContext> context) noexcept
+    : context_(std::move(context))
 {
   OTEL_INTERNAL_LOG_DEBUG("[TracerProvider] TracerProvider created.");
 }

sdk/src/trace/tracer_provider_factory.cc

@@ -5,6 +5,7 @@
 #include "opentelemetry/sdk/trace/processor.h"
 #include "opentelemetry/sdk/trace/random_id_generator_factory.h"
 #include "opentelemetry/sdk/trace/samplers/always_on_factory.h"
+#include "opentelemetry/sdk/trace/tracer_context.h"
 #include "opentelemetry/sdk/trace/tracer_provider.h"
 
 namespace trace_api = opentelemetry::trace;
@@ -87,9 +88,10 @@ std::unique_ptr<opentelemetry::trace::TracerProvider> TracerProviderFactory::Cre
 }
 
 std::unique_ptr<trace_api::TracerProvider> TracerProviderFactory::Create(
-    std::shared_ptr<sdk::trace::TracerContext> context)
+    std::unique_ptr<TracerContext> context)
 {
-  std::unique_ptr<trace_api::TracerProvider> provider(new trace_sdk::TracerProvider(context));
+  std::unique_ptr<trace_api::TracerProvider> provider(
+      new trace_sdk::TracerProvider(std::move(context)));
   return provider;
 }
 

sdk/test/logs/logger_provider_sdk_test.cc

@@ -170,7 +170,8 @@ TEST(LoggerProviderSDK, Shutdown)
   std::vector<std::unique_ptr<LogRecordProcessor>> processors;
   processors.push_back(std::move(processor));
 
-  LoggerProvider lp(std::make_shared<LoggerContext>(std::move(processors)));
+  std::unique_ptr<LoggerContext> context(new LoggerContext(std::move(processors)));
+  LoggerProvider lp(std::move(context));
 
   EXPECT_TRUE(lp.Shutdown());
   EXPECT_TRUE(processor_ptr->IsShutdown());
@@ -185,7 +186,8 @@ TEST(LoggerProviderSDK, ForceFlush)
   std::vector<std::unique_ptr<LogRecordProcessor>> processors;
   processors.push_back(std::move(processor));
 
-  LoggerProvider lp(std::make_shared<LoggerContext>(std::move(processors)));
+  std::unique_ptr<LoggerContext> context(new LoggerContext(std::move(processors)));
+  LoggerProvider lp(std::move(context));
 
   EXPECT_TRUE(lp.ForceFlush());
 }

sdk/test/trace/tracer_provider_test.cc

@@ -20,7 +20,9 @@ TEST(TracerProvider, GetTracer)
   std::unique_ptr<SpanProcessor> processor(new SimpleSpanProcessor(nullptr));
   std::vector<std::unique_ptr<SpanProcessor>> processors;
   processors.push_back(std::move(processor));
-  TracerProvider tp1(std::make_shared<TracerContext>(std::move(processors), Resource::Create({})));
+  std::unique_ptr<TracerContext> context1(
+      new TracerContext(std::move(processors), Resource::Create({})));
+  TracerProvider tp1(std::move(context1));
   auto t1 = tp1.GetTracer("test");
   auto t2 = tp1.GetTracer("test");
   auto t3 = tp1.GetTracer("different", "1.0.0");
@@ -49,10 +51,11 @@ TEST(TracerProvider, GetTracer)
   std::unique_ptr<SpanProcessor> processor2(new SimpleSpanProcessor(nullptr));
   std::vector<std::unique_ptr<SpanProcessor>> processors2;
   processors2.push_back(std::move(processor2));
-  TracerProvider tp2(
-      std::make_shared<TracerContext>(std::move(processors2), Resource::Create({}),
-                                      std::unique_ptr<Sampler>(new AlwaysOffSampler()),
-                                      std::unique_ptr<IdGenerator>(new RandomIdGenerator)));
+  std::unique_ptr<TracerContext> context2(
+      new TracerContext(std::move(processors2), Resource::Create({}),
+                        std::unique_ptr<Sampler>(new AlwaysOffSampler()),
+                        std::unique_ptr<IdGenerator>(new RandomIdGenerator)));
+  TracerProvider tp2(std::move(context2));
 #ifdef OPENTELEMETRY_RTTI_ENABLED
   auto sdkTracer2 = dynamic_cast<Tracer *>(tp2.GetTracer("test").get());
 #else
@@ -81,7 +84,8 @@ TEST(TracerProvider, Shutdown)
   std::vector<std::unique_ptr<SpanProcessor>> processors;
   processors.push_back(std::move(processor));
 
-  TracerProvider tp1(std::make_shared<TracerContext>(std::move(processors)));
+  std::unique_ptr<TracerContext> context1(new TracerContext(std::move(processors)));
+  TracerProvider tp1(std::move(context1));
 
   EXPECT_TRUE(tp1.Shutdown());