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/*
*
* Copyright 2015 gRPC authors.
*
* 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.
*
*/
// Generates cpp gRPC service interface out of Protobuf IDL.
//
#include <memory>
#include <sstream>
#include "src/compiler/config.h"
#include "src/compiler/cpp_generator.h"
#include "src/compiler/generator_helpers.h"
#include "src/compiler/protobuf_plugin.h"
class CppGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
public:
CppGrpcGenerator() {}
virtual ~CppGrpcGenerator() {}
virtual bool Generate(const grpc::protobuf::FileDescriptor* file,
const grpc::string& parameter,
grpc::protobuf::compiler::GeneratorContext* context,
grpc::string* error) const {
if (file->options().cc_generic_services()) {
*error =
"cpp grpc proto compiler plugin does not work with generic "
"services. To generate cpp grpc APIs, please set \""
"cc_generic_service = false\".";
return false;
}
grpc_cpp_generator::Parameters generator_parameters;
generator_parameters.use_system_headers = true;
generator_parameters.generate_mock_code = false;
ProtoBufFile pbfile(file);
if (!parameter.empty()) {
std::vector<grpc::string> parameters_list =
grpc_generator::tokenize(parameter, ",");
for (auto parameter_string = parameters_list.begin();
parameter_string != parameters_list.end(); parameter_string++) {
std::vector<grpc::string> param =
grpc_generator::tokenize(*parameter_string, "=");
if (param[0] == "services_namespace") {
generator_parameters.services_namespace = param[1];
} else if (param[0] == "use_system_headers") {
if (param[1] == "true") {
generator_parameters.use_system_headers = true;
} else if (param[1] == "false") {
generator_parameters.use_system_headers = false;
} else {
*error = grpc::string("Invalid parameter: ") + *parameter_string;
return false;
}
} else if (param[0] == "grpc_search_path") {
generator_parameters.grpc_search_path = param[1];
} else if (param[0] == "generate_mock_code") {
if (param[1] == "true") {
generator_parameters.generate_mock_code = true;
} else if (param[1] != "false") {
*error = grpc::string("Invalid parameter: ") + *parameter_string;
return false;
}
} else if (param[0] == "gmock_search_path") {
generator_parameters.gmock_search_path = param[1];
} else if (param[0] == "additional_header_includes") {
generator_parameters.additional_header_includes =
grpc_generator::tokenize(param[1], ":");
} else {
*error = grpc::string("Unknown parameter: ") + *parameter_string;
return false;
}
}
}
grpc::string file_name = grpc_generator::StripProto(file->name());
grpc::string header_code =
grpc_cpp_generator::GetHeaderPrologue(&pbfile, generator_parameters) +
grpc_cpp_generator::GetHeaderIncludes(&pbfile, generator_parameters) +
grpc_cpp_generator::GetHeaderServices(&pbfile, generator_parameters) +
grpc_cpp_generator::GetHeaderEpilogue(&pbfile, generator_parameters);
std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> header_output(
context->Open(file_name + ".grpc.pb.h"));
grpc::protobuf::io::CodedOutputStream header_coded_out(header_output.get());
header_coded_out.WriteRaw(header_code.data(), header_code.size());
grpc::string source_code =
grpc_cpp_generator::GetSourcePrologue(&pbfile, generator_parameters) +
grpc_cpp_generator::GetSourceIncludes(&pbfile, generator_parameters) +
grpc_cpp_generator::GetSourceServices(&pbfile, generator_parameters) +
grpc_cpp_generator::GetSourceEpilogue(&pbfile, generator_parameters);
std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> source_output(
context->Open(file_name + ".grpc.pb.cc"));
grpc::protobuf::io::CodedOutputStream source_coded_out(source_output.get());
source_coded_out.WriteRaw(source_code.data(), source_code.size());
if (!generator_parameters.generate_mock_code) {
return true;
}
grpc::string mock_code =
grpc_cpp_generator::GetMockPrologue(&pbfile, generator_parameters) +
grpc_cpp_generator::GetMockIncludes(&pbfile, generator_parameters) +
grpc_cpp_generator::GetMockServices(&pbfile, generator_parameters) +
grpc_cpp_generator::GetMockEpilogue(&pbfile, generator_parameters);
std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> mock_output(
context->Open(file_name + "_mock.grpc.pb.h"));
grpc::protobuf::io::CodedOutputStream mock_coded_out(mock_output.get());
mock_coded_out.WriteRaw(mock_code.data(), mock_code.size());
return true;
}
private:
// Insert the given code into the given file at the given insertion point.
void Insert(grpc::protobuf::compiler::GeneratorContext* context,
const grpc::string& filename, const grpc::string& insertion_point,
const grpc::string& code) const {
std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> output(
context->OpenForInsert(filename, insertion_point));
grpc::protobuf::io::CodedOutputStream coded_out(output.get());
coded_out.WriteRaw(code.data(), code.size());
}
};
int main(int argc, char* argv[]) {
CppGrpcGenerator generator;
return grpc::protobuf::compiler::PluginMain(argc, argv, &generator);
}
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