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GetServiceNameFromDescriptor and CreateServiceMethodInformationSet in…
… separate unit msg/protobuf/client_protobuf_utils.h
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serialization/protobuf/protobuf/include/ecal/msg/protobuf/client_protobuf_utils.h
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| /* ========================= eCAL LICENSE ================================= | ||
| * | ||
| * Copyright (C) 2016 - 2025 Continental Corporation | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * | ||
| * ========================= eCAL LICENSE ================================= | ||
| */ | ||
|
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| /** | ||
| * @file client_protobuf_utils.h | ||
| * @brief eCAL client protobuf service utility functions | ||
| **/ | ||
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| #pragma once | ||
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| #include <ecal/service/client.h> | ||
| #include <ecal/msg/protobuf/ecal_proto_dyn.h> | ||
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| #include <google/protobuf/service.h> | ||
| #include <google/protobuf/descriptor.h> | ||
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| #include <stdexcept> | ||
| #include <string> | ||
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| namespace eCAL | ||
| { | ||
| namespace protobuf | ||
| { | ||
| /** | ||
| * @brief Retrieves the full service name from the Protobuf descriptor of the given type T. | ||
| * | ||
| * The service type T is expected to be generated by Protobuf and have | ||
| * a static method_descriptor or a protected GetDescriptor() method. | ||
| * | ||
| * @tparam T The Protobuf-generated service class. | ||
| * | ||
| * @return The full service name (e.g. "myproto.MyService"). | ||
| */ | ||
| template <typename T> | ||
| std::string GetServiceNameFromDescriptor() | ||
| { | ||
| struct U : T {}; // Temporary subclass to access protected GetDescriptor() | ||
| U temp_instance; | ||
| return temp_instance.GetDescriptor()->full_name(); | ||
| } | ||
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| /** | ||
| * @brief Creates a ServiceMethodInformationSetT for all methods in service type T, | ||
| * so that eCAL knows how to serialize/deserialize them (proto). | ||
| * | ||
| * @tparam T The Protobuf-generated service class. | ||
| * @return The set of method info for eCAL registration. | ||
| */ | ||
| template <typename T> | ||
| eCAL::ServiceMethodInformationSetT CreateServiceMethodInformationSet() | ||
| { | ||
| struct U : T {}; // Temporary subclass to access protected GetDescriptor() | ||
| U temp_instance; | ||
| const google::protobuf::ServiceDescriptor* service_descriptor = temp_instance.GetDescriptor(); | ||
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| if (service_descriptor == nullptr) | ||
| { | ||
| throw std::runtime_error("Failed to retrieve service descriptor."); | ||
| } | ||
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| ServiceMethodInformationSetT method_information_set; | ||
| CProtoDynDecoder dyn_decoder; | ||
| std::string error_s; | ||
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| for (int i = 0; i < service_descriptor->method_count(); ++i) | ||
| { | ||
| const google::protobuf::MethodDescriptor* method_descriptor = service_descriptor->method(i); | ||
| const std::string& method_name = method_descriptor->name(); | ||
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| const std::string& request_type_name = method_descriptor->input_type()->name(); | ||
| const std::string& response_type_name = method_descriptor->output_type()->name(); | ||
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| std::string request_type_descriptor; | ||
| std::string response_type_descriptor; | ||
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| dyn_decoder.GetServiceMessageDescFromType(service_descriptor, request_type_name, request_type_descriptor, error_s); | ||
| dyn_decoder.GetServiceMessageDescFromType(service_descriptor, response_type_name, response_type_descriptor, error_s); | ||
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| method_information_set.emplace(SServiceMethodInformation{ | ||
| method_name, | ||
| SDataTypeInformation{request_type_name, "proto", request_type_descriptor}, | ||
| SDataTypeInformation{response_type_name, "proto", response_type_descriptor} | ||
| }); | ||
| } | ||
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| return method_information_set; | ||
| } | ||
| } // namespace protobuf | ||
| } // namespace eCAL |
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