/*
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*
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* Copyright 2015 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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// Generates cpp gRPC service interface out of Protobuf IDL.
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//
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#include <memory>
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#include <sstream>
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#include "src/compiler/config.h"
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#include "src/compiler/cpp_generator.h"
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#include "src/compiler/generator_helpers.h"
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#include "src/compiler/protobuf_plugin.h"
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class CppGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
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public:
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CppGrpcGenerator() {}
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virtual ~CppGrpcGenerator() {}
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virtual bool Generate(const grpc::protobuf::FileDescriptor* file,
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const grpc::string& parameter,
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grpc::protobuf::compiler::GeneratorContext* context,
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grpc::string* error) const {
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if (file->options().cc_generic_services()) {
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*error =
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"cpp grpc proto compiler plugin does not work with generic "
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"services. To generate cpp grpc APIs, please set \""
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"cc_generic_service = false\".";
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return false;
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}
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grpc_cpp_generator::Parameters generator_parameters;
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generator_parameters.use_system_headers = true;
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generator_parameters.generate_mock_code = false;
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ProtoBufFile pbfile(file);
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if (!parameter.empty()) {
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std::vector<grpc::string> parameters_list =
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grpc_generator::tokenize(parameter, ",");
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for (auto parameter_string = parameters_list.begin();
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parameter_string != parameters_list.end(); parameter_string++) {
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std::vector<grpc::string> param =
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grpc_generator::tokenize(*parameter_string, "=");
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if (param[0] == "services_namespace") {
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generator_parameters.services_namespace = param[1];
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} else if (param[0] == "use_system_headers") {
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if (param[1] == "true") {
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generator_parameters.use_system_headers = true;
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} else if (param[1] == "false") {
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generator_parameters.use_system_headers = false;
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} else {
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*error = grpc::string("Invalid parameter: ") + *parameter_string;
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return false;
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}
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} else if (param[0] == "grpc_search_path") {
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generator_parameters.grpc_search_path = param[1];
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} else if (param[0] == "generate_mock_code") {
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if (param[1] == "true") {
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generator_parameters.generate_mock_code = true;
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} else if (param[1] != "false") {
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*error = grpc::string("Invalid parameter: ") + *parameter_string;
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return false;
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}
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} else if (param[0] == "gmock_search_path") {
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generator_parameters.gmock_search_path = param[1];
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} else if (param[0] == "additional_header_includes") {
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generator_parameters.additional_header_includes =
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grpc_generator::tokenize(param[1], ":");
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} else {
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*error = grpc::string("Unknown parameter: ") + *parameter_string;
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return false;
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}
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}
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}
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grpc::string file_name = grpc_generator::StripProto(file->name());
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grpc::string header_code =
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grpc_cpp_generator::GetHeaderPrologue(&pbfile, generator_parameters) +
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grpc_cpp_generator::GetHeaderIncludes(&pbfile, generator_parameters) +
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grpc_cpp_generator::GetHeaderServices(&pbfile, generator_parameters) +
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grpc_cpp_generator::GetHeaderEpilogue(&pbfile, generator_parameters);
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std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> header_output(
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context->Open(file_name + ".grpc.pb.h"));
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grpc::protobuf::io::CodedOutputStream header_coded_out(header_output.get());
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header_coded_out.WriteRaw(header_code.data(), header_code.size());
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grpc::string source_code =
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grpc_cpp_generator::GetSourcePrologue(&pbfile, generator_parameters) +
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grpc_cpp_generator::GetSourceIncludes(&pbfile, generator_parameters) +
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grpc_cpp_generator::GetSourceServices(&pbfile, generator_parameters) +
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grpc_cpp_generator::GetSourceEpilogue(&pbfile, generator_parameters);
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std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> source_output(
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context->Open(file_name + ".grpc.pb.cc"));
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grpc::protobuf::io::CodedOutputStream source_coded_out(source_output.get());
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source_coded_out.WriteRaw(source_code.data(), source_code.size());
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if (!generator_parameters.generate_mock_code) {
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return true;
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}
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grpc::string mock_code =
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grpc_cpp_generator::GetMockPrologue(&pbfile, generator_parameters) +
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grpc_cpp_generator::GetMockIncludes(&pbfile, generator_parameters) +
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grpc_cpp_generator::GetMockServices(&pbfile, generator_parameters) +
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grpc_cpp_generator::GetMockEpilogue(&pbfile, generator_parameters);
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std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> mock_output(
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context->Open(file_name + "_mock.grpc.pb.h"));
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grpc::protobuf::io::CodedOutputStream mock_coded_out(mock_output.get());
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mock_coded_out.WriteRaw(mock_code.data(), mock_code.size());
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return true;
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}
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private:
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// Insert the given code into the given file at the given insertion point.
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void Insert(grpc::protobuf::compiler::GeneratorContext* context,
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const grpc::string& filename, const grpc::string& insertion_point,
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const grpc::string& code) const {
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std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> output(
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context->OpenForInsert(filename, insertion_point));
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grpc::protobuf::io::CodedOutputStream coded_out(output.get());
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coded_out.WriteRaw(code.data(), code.size());
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}
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};
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int main(int argc, char* argv[]) {
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CppGrpcGenerator generator;
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return grpc::protobuf::compiler::PluginMain(argc, argv, &generator);
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}
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