feat grpc: use utils::StringLiteral for gRPC service and method names

Tests: протестировано CI
commit_hash:f4dbd3a19d20c4a99175ec34a7c52033f803277c

Author: apolukhin

grpc/include/userver/ugrpc/impl/static_service_metadata.hpp

@@ -4,6 +4,7 @@
 #include <string_view>
 
 #include <userver/utils/span.hpp>
+#include <userver/utils/string_literal.hpp>
 
 #include <userver/ugrpc/impl/rpc_type.hpp>
 
@@ -13,13 +14,13 @@ namespace ugrpc::impl {
 
 /// Descriptor of an RPC method
 struct MethodDescriptor final {
-    std::string_view method_full_name;
-    RpcType method_type;
+    utils::StringLiteral method_full_name;
+    RpcType method_type{RpcType::kUnary};
 };
 
 /// Per-gRPC-service statically generated data
 struct StaticServiceMetadata final {
-    std::string_view service_full_name;
+    utils::StringLiteral service_full_name;
     utils::span<const MethodDescriptor> methods;
 };
 
@@ -32,13 +33,14 @@ constexpr std::size_t GetMethodsCount(const StaticServiceMetadata& metadata) noe
     return metadata.methods.size();
 }
 
-constexpr std::string_view GetMethodFullName(const StaticServiceMetadata& metadata, std::size_t method_id) {
+constexpr utils::StringLiteral GetMethodFullName(const StaticServiceMetadata& metadata, std::size_t method_id) {
     return metadata.methods[method_id].method_full_name;
 }
 
-constexpr std::string_view GetMethodName(const StaticServiceMetadata& metadata, std::size_t method_id) {
-    auto method_full_name = GetMethodFullName(metadata, method_id);
-    return method_full_name.substr(metadata.service_full_name.size() + 1);
+constexpr utils::StringLiteral GetMethodName(const StaticServiceMetadata& metadata, std::size_t method_id) {
+    auto result = ugrpc::impl::GetMethodFullName(metadata, method_id);
+    result.remove_prefix(metadata.service_full_name.size() + 1);
+    return result;
 }
 
 constexpr RpcType GetMethodType(const StaticServiceMetadata& metadata, std::size_t method_id) {

grpc/include/userver/ugrpc/server/impl/service_worker_impl.hpp

@@ -76,9 +76,9 @@ struct MethodData final {
     typename CallTraits::ServiceBase& service;
     const typename CallTraits::ServiceMethod service_method;
 
-    std::string_view call_name{GetMethodFullName(service_data.metadata, method_id)};
+    utils::StringLiteral call_name{ugrpc::impl::GetMethodFullName(service_data.metadata, method_id)};
     // Remove name of the service and slash
-    std::string_view method_name{GetMethodName(service_data.metadata, method_id)};
+    utils::StringLiteral method_name{ugrpc::impl::GetMethodName(service_data.metadata, method_id)};
     ugrpc::impl::MethodStatistics& statistics{service_data.service_statistics.GetMethodStatistics(method_id)};
 };
 

grpc/src/ugrpc/server/impl/generic_service_worker.cpp

@@ -12,10 +12,10 @@ namespace ugrpc::server::impl {
 
 namespace {
 
-constexpr std::string_view kGenericServiceFullNameFake = "Generic";
+constexpr utils::StringLiteral kGenericServiceFullNameFake = "Generic";
 
 constexpr std::array kGenericMethodsFake = {ugrpc::impl::MethodDescriptor{
-    /*method_full_name*/ "Generic/Generic",
+    /*method_full_name*/ utils::StringLiteral{"Generic/Generic"},
     /*method_type*/ ugrpc::impl::RpcType::kBidiStreaming,
 }};