Merge pull request #45 from kpavlov00/grpc-server-usability

feat grpc: switch to simplified service handlers interface

Author: kpavlov00

src/hello.cpp

@@ -8,8 +8,8 @@
 
 namespace pg_grpc_service_template {
 
-void Hello::SayHello(handlers::api::HelloServiceBase::SayHelloCall& call,
-                     handlers::api::HelloRequest&& request) {
+Hello::SayHelloResult Hello::SayHello(CallContext& /*context*/,
+                                      handlers::api::HelloRequest&& request) {
   auto name = request.name();
 
   auto user_type = UserType::kFirstTime;
@@ -31,7 +31,7 @@ void Hello::SayHello(handlers::api::HelloServiceBase::SayHelloCall& call,
   }
   handlers::api::HelloResponse response;
   response.set_text(pg_grpc_service_template::SayHelloTo(name, user_type));
-  call.Finish(response);
+  return response;
 }
 
 std::string SayHelloTo(std::string_view name, UserType type) {

src/hello.hpp

@@ -27,8 +27,8 @@ class Hello final : public handlers::api::HelloServiceBase::Component {
                 .GetCluster()),
         client_(component_context.FindComponent<HelloClient>()) {}
 
-  void SayHello(handlers::api::HelloServiceBase::SayHelloCall& call,
-                handlers::api::HelloRequest&& request);
+  SayHelloResult SayHello(CallContext& context,
+                          handlers::api::HelloRequest&& request);
 
  private:
   userver::storages::postgres::ClusterPtr pg_cluster_;