fix: replace magic number with SAMPLED constant

Author: nikhilmantri0902

exporter/otlp/lib/opentelemetry/exporter/otlp/exporter.rb

@@ -107,11 +107,11 @@ def shutdown(timeout: nil)
         # This follows the OTLP specification for span flags.
         def build_span_flags(parent_span_is_remote, base_flags)
           # Extract integer value from TraceFlags object if needed
-          if base_flags.is_a?(OpenTelemetry::Trace::TraceFlags)
-            base_flags_int = base_flags.instance_variable_get(:@flags)
-          else
-            base_flags_int = base_flags
-          end
+          base_flags_int = if base_flags.is_a?(OpenTelemetry::Trace::TraceFlags)
+                              base_flags.instance_variable_get(:@flags)
+                            else
+                              base_flags
+                            end
 
           has_remote_mask = Opentelemetry::Proto::Trace::V1::SpanFlags::SPAN_FLAGS_CONTEXT_HAS_IS_REMOTE_MASK
           is_remote_mask = Opentelemetry::Proto::Trace::V1::SpanFlags::SPAN_FLAGS_CONTEXT_IS_REMOTE_MASK

exporter/otlp/test/opentelemetry/exporter/otlp/exporter_test.rb

@@ -674,7 +674,7 @@
                       end_time_unix_nano: (end_timestamp.to_r * 1_000_000_000).to_i,
                       flags: (
                         Opentelemetry::Proto::Trace::V1::SpanFlags::SPAN_FLAGS_CONTEXT_HAS_IS_REMOTE_MASK |
-                        0x01
+                        OpenTelemetry::Trace::TraceFlags::SAMPLED.instance_variable_get(:@flags)
                       ),
                       status: Opentelemetry::Proto::Trace::V1::Status.new(
                         code: Opentelemetry::Proto::Trace::V1::Status::StatusCode::STATUS_CODE_OK
@@ -690,7 +690,7 @@
                       end_time_unix_nano: (end_timestamp.to_r * 1_000_000_000).to_i,
                       flags: (
                         Opentelemetry::Proto::Trace::V1::SpanFlags::SPAN_FLAGS_CONTEXT_HAS_IS_REMOTE_MASK |
-                        0x01
+                        OpenTelemetry::Trace::TraceFlags::SAMPLED.instance_variable_get(:@flags)
                       ),
                       status: Opentelemetry::Proto::Trace::V1::Status.new(
                         code: Opentelemetry::Proto::Trace::V1::Status::StatusCode::STATUS_CODE_UNSET
@@ -706,7 +706,7 @@
                       end_time_unix_nano: (end_timestamp.to_r * 1_000_000_000).to_i,
                       flags: (
                         Opentelemetry::Proto::Trace::V1::SpanFlags::SPAN_FLAGS_CONTEXT_HAS_IS_REMOTE_MASK |
-                        0x01
+                        OpenTelemetry::Trace::TraceFlags::SAMPLED.instance_variable_get(:@flags)
                       ),
                       status: Opentelemetry::Proto::Trace::V1::Status.new(
                         code: Opentelemetry::Proto::Trace::V1::Status::StatusCode::STATUS_CODE_UNSET
@@ -755,7 +755,7 @@
                           ],
                           flags: (
                             Opentelemetry::Proto::Trace::V1::SpanFlags::SPAN_FLAGS_CONTEXT_HAS_IS_REMOTE_MASK |
-                            0x01
+                            OpenTelemetry::Trace::TraceFlags::SAMPLED.instance_variable_get(:@flags)
                           )
                         )
                       ],
@@ -764,7 +764,7 @@
                       ),
                       flags: (
                         Opentelemetry::Proto::Trace::V1::SpanFlags::SPAN_FLAGS_CONTEXT_HAS_IS_REMOTE_MASK |
-                        0x01
+                        OpenTelemetry::Trace::TraceFlags::SAMPLED.instance_variable_get(:@flags)
                       )
                     )
                   ]
@@ -784,7 +784,7 @@
                       end_time_unix_nano: (end_timestamp.to_r * 1_000_000_000).to_i,
                       flags: (
                         Opentelemetry::Proto::Trace::V1::SpanFlags::SPAN_FLAGS_CONTEXT_HAS_IS_REMOTE_MASK |
-                        0x01
+                        OpenTelemetry::Trace::TraceFlags::SAMPLED.instance_variable_get(:@flags)
                       ),
                       status: Opentelemetry::Proto::Trace::V1::Status.new(
                         code: Opentelemetry::Proto::Trace::V1::Status::StatusCode::STATUS_CODE_UNSET