resource.rb in opentelemetry-sdk-1.0.0.rc2

- old
+ new

@@ -29,11 +29,11 @@
 
             new(frozen_attributes)
           end
 
           def default
-            @default ||= create(Constants::SERVICE_RESOURCE[:name] => 'unknown_service').merge(process).merge(telemetry_sdk)
+            @default ||= create(Constants::SERVICE_RESOURCE[:name] => 'unknown_service').merge(process).merge(telemetry_sdk).merge(service_name_from_env)
           end
 
           def telemetry_sdk
             resource_attributes = {
               Constants::TELEMETRY_SDK_RESOURCE[:name] => 'opentelemetry',
@@ -61,9 +61,16 @@
               Constants::PROCESS_RUNTIME_RESOURCE[:version] => RUBY_VERSION,
               Constants::PROCESS_RUNTIME_RESOURCE[:description] => RUBY_DESCRIPTION
             }
 
             create(resource_attributes)
+          end
+
+          private
+
+          def service_name_from_env
+            service_name = ENV['OTEL_SERVICE_NAME']
+            create(Constants::SERVICE_RESOURCE[:name] => service_name) unless service_name.nil?
           end
         end
 
         # @api private
         # The constructor is private and only for use internally by the class.