Integrate Util::Quantization

adapters/rack/lib/opentelemetry/adapters/rack/adapter.rb

@@ -14,6 +14,7 @@ class Adapter < OpenTelemetry::Instrumentation::Adapter
           require_dependencies
 
           retain_middleware_names if config[:retain_middleware_names]
+          configure_default_quantization
 
           if (app = config[:application])
             app.use Middlewares::TracerMiddleware
@@ -32,6 +33,7 @@ class Adapter < OpenTelemetry::Instrumentation::Adapter
 
         def require_dependencies
           require_relative 'middlewares/tracer_middleware'
+          require_relative 'util/quantization'
         end
 
         MissingApplicationError = Class.new(StandardError)
@@ -57,6 +59,10 @@ def call(env)
                               next_middleware.instance_variable_get('@app')
           end
         end
+
+        def configure_default_quantization
+          config[:url_quantization] ||= ->(url) { Util::Quantization.url(url, config[:quantization_options]) }
+        end
       end
     end
   end

adapters/rack/test/opentelemetry/adapters/rack/middlewares/tracer_middleware_test.rb

@@ -9,6 +9,7 @@
 # require Adapter so .install method is found:
 require_relative '../../../../../lib/opentelemetry/adapters/rack'
 require_relative '../../../../../lib/opentelemetry/adapters/rack/adapter'
+require_relative '../../../../../lib/opentelemetry/adapters/rack/util/quantization'
 require_relative '../../../../../lib/opentelemetry/adapters/rack/middlewares/tracer_middleware'
 
 describe OpenTelemetry::Adapters::Rack::Middlewares::TracerMiddleware do
@@ -146,7 +147,7 @@
 
   describe 'config[:quantization]' do
     before do
-      Rack::MockRequest.new(rack_builder).get('/really_long_url', env)
+      Rack::MockRequest.new(rack_builder).get('/really_long_url?category_id=1&sort_by=asc#featured', env)
     end
 
     describe 'without quantization' do
@@ -165,6 +166,19 @@
       it 'mutates url according to url_quantization' do
         _(first_span.name).must_equal '/reall'
       end
+
+      describe 'with more complex quantization' do
+        let(:quantization_options) do
+          { query: { exclude: :all } }
+        end
+        let(:quantization_example) do
+          ->(url) { adapter_module::Util::Quantization.url(url, quantization_options) }
+        end
+
+        it 'mutates url' do
+          _(first_span.name).must_equal '/really_long_url'
+        end
+      end
     end
   end