Fix missing ObservedTimestamp.

Signed-off-by: owent <admin@owent.net>

sdk/src/logs/logger.cc

@@ -40,6 +40,9 @@ nostd::unique_ptr<opentelemetry::logs::LogRecord> Logger::CreateLogRecord() noex
   }
 
   auto recordable = context_->GetProcessor().MakeRecordable();
+
+  recordable->SetObservedTimestamp(std::chrono::system_clock::now());
+
   if (include_trace_context_ &&
       opentelemetry::context::RuntimeContext::GetCurrent().HasKey(opentelemetry::trace::kSpanKey))
   {

sdk/test/logs/logger_sdk_test.cc

@@ -3,6 +3,7 @@
 
 #ifdef ENABLE_LOGS_PREVIEW
 
+#  include <chrono>
 #  include <string>
 
 #  include "opentelemetry/nostd/string_view.h"
@@ -43,7 +44,16 @@ class MockLogRecordable final : public opentelemetry::sdk::logs::Recordable
 public:
   void SetTimestamp(opentelemetry::common::SystemTimestamp) noexcept override {}
 
-  void SetObservedTimestamp(opentelemetry::common::SystemTimestamp) noexcept override {}
+  void SetObservedTimestamp(
+      opentelemetry::common::SystemTimestamp observed_timestamp) noexcept override
+  {
+    observed_timestamp_ = observed_timestamp;
+  }
+
+  const opentelemetry::common::SystemTimestamp &GetObservedTimestamp() const noexcept
+  {
+    return observed_timestamp_;
+  }
 
   opentelemetry::logs::Severity GetSeverity() const noexcept { return severity_; }
 
@@ -138,6 +148,8 @@ class MockLogRecordable final : public opentelemetry::sdk::logs::Recordable
   opentelemetry::trace::TraceFlags trace_flags_;
   std::string event_name_;
   std::string event_domain_;
+  opentelemetry::common::SystemTimestamp observed_timestamp_ =
+      std::chrono::system_clock::from_time_t(0);
 };
 
 class MockProcessor final : public LogRecordProcessor
@@ -196,6 +208,8 @@ TEST(LoggerSDK, LogToAProcessor)
   }
   opentelemetry::trace::Scope trace_scope{include_span};
 
+  auto now = std::chrono::system_clock::now();
+
   auto sdk_logger = static_cast<opentelemetry::sdk::logs::Logger *>(logger.get());
   ASSERT_EQ(sdk_logger->GetInstrumentationScope().GetName(), "opentelelemtry_library");
   ASSERT_EQ(sdk_logger->GetInstrumentationScope().GetVersion(), "");
@@ -226,6 +240,10 @@ TEST(LoggerSDK, LogToAProcessor)
   std::string span_id_text_in_span{span_id_in_span, sizeof(span_id_in_span)};
   ASSERT_EQ(trace_id_text_in_logger, trace_id_text_in_span);
   ASSERT_EQ(span_id_text_in_logger, span_id_text_in_span);
+
+  ASSERT_GE(
+      static_cast<std::chrono::system_clock::time_point>(shared_recordable->GetObservedTimestamp()),
+      now);
 }
 
 TEST(LoggerSDK, EventLog)