Expose formatted service name as a const fn

tonic-build/src/server.rs

@@ -358,10 +358,14 @@ fn generate_named(
     service_name: &str,
 ) -> TokenStream {
     let service_name = syn::LitStr::new(service_name, proc_macro2::Span::call_site());
+    let name_doc = generate_doc_comment(" Generated gRPC service name");
 
     quote! {
+        #name_doc
+        pub const SERVICE_NAME: &'static str = #service_name;
+
         impl<T: #server_trait> tonic::server::NamedService for #server_service<T> {
-            const NAME: &'static str = #service_name;
+            const NAME: &'static str = SERVICE_NAME;
         }
     }
 }

tonic-health/src/generated/grpc_health_v1.rs

@@ -439,7 +439,9 @@ pub mod health_server {
             }
         }
     }
+    /// Generated gRPC service name
+    pub const SERVICE_NAME: &'static str = "grpc.health.v1.Health";
     impl<T: Health> tonic::server::NamedService for HealthServer<T> {
-        const NAME: &'static str = "grpc.health.v1.Health";
+        const NAME: &'static str = SERVICE_NAME;
     }
 }

tonic-reflection/src/generated/grpc_reflection_v1.rs

@@ -448,7 +448,9 @@ pub mod server_reflection_server {
             }
         }
     }
+    /// Generated gRPC service name
+    pub const SERVICE_NAME: &'static str = "grpc.reflection.v1.ServerReflection";
     impl<T: ServerReflection> tonic::server::NamedService for ServerReflectionServer<T> {
-        const NAME: &'static str = "grpc.reflection.v1.ServerReflection";
+        const NAME: &'static str = SERVICE_NAME;
     }
 }

tonic-reflection/src/generated/grpc_reflection_v1alpha.rs

@@ -448,7 +448,9 @@ pub mod server_reflection_server {
             }
         }
     }
+    /// Generated gRPC service name
+    pub const SERVICE_NAME: &'static str = "grpc.reflection.v1alpha.ServerReflection";
     impl<T: ServerReflection> tonic::server::NamedService for ServerReflectionServer<T> {
-        const NAME: &'static str = "grpc.reflection.v1alpha.ServerReflection";
+        const NAME: &'static str = SERVICE_NAME;
     }
 }