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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
// Generates cpp gRPC service interface out of Protobuf IDL.
//
#include <memory>
#include "src/compiler/config.h"
#include "src/compiler/cpp_generator.h"
#include "src/compiler/cpp_generator_helpers.h"
class CppGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
public:
CppGrpcGenerator() {}
virtual ~CppGrpcGenerator() {}
virtual bool Generate(const grpc::protobuf::FileDescriptor *file,
const grpc::string ¶meter,
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;
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 {
*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(file, generator_parameters) +
grpc_cpp_generator::GetHeaderIncludes(file, generator_parameters) +
grpc_cpp_generator::GetHeaderServices(file, generator_parameters) +
grpc_cpp_generator::GetHeaderEpilogue(file, 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(file, generator_parameters) +
grpc_cpp_generator::GetSourceIncludes(file, generator_parameters) +
grpc_cpp_generator::GetSourceServices(file, generator_parameters) +
grpc_cpp_generator::GetSourceEpilogue(file, 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());
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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