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grpc/src/compiler/cpp_generator.cc

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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.
*
*/
#include <map>
#include "src/compiler/cpp_generator.h"
#include <sstream>
namespace grpc_cpp_generator {
namespace {
template <class T>
grpc::string as_string(T x) {
std::ostringstream out;
out << x;
return out.str();
}
inline bool ClientOnlyStreaming(const grpc_generator::Method *method) {
return method->ClientStreaming() && !method->ServerStreaming();
}
inline bool ServerOnlyStreaming(const grpc_generator::Method *method) {
return !method->ClientStreaming() && method->ServerStreaming();
}
grpc::string FilenameIdentifier(const grpc::string &filename) {
grpc::string result;
for (unsigned i = 0; i < filename.size(); i++) {
char c = filename[i];
if (isalnum(c)) {
result.push_back(c);
} else {
static char hex[] = "0123456789abcdef";
result.push_back('_');
result.push_back(hex[(c >> 4) & 0xf]);
result.push_back(hex[c & 0xf]);
}
}
return result;
}
} // namespace
template <class T, size_t N>
T *array_end(T (&array)[N]) {
return array + N;
}
void PrintIncludes(grpc_generator::Printer *printer,
const std::vector<grpc::string> &headers,
const Parameters &params) {
std::map<grpc::string, grpc::string> vars;
vars["l"] = params.use_system_headers ? '<' : '"';
vars["r"] = params.use_system_headers ? '>' : '"';
auto &s = params.grpc_search_path;
if (!s.empty()) {
vars["l"] += s;
if (s[s.size() - 1] != '/') {
vars["l"] += '/';
}
}
for (auto i = headers.begin(); i != headers.end(); i++) {
vars["h"] = *i;
printer->Print(vars, "#include $l$$h$$r$\n");
}
}
grpc::string GetHeaderPrologue(grpc_generator::File *file,
const Parameters & /*params*/) {
grpc::string output;
{
// Scope the output stream so it closes and finalizes output to the string.
auto printer = file->CreatePrinter(&output);
std::map<grpc::string, grpc::string> vars;
vars["filename"] = file->filename();
vars["filename_identifier"] = FilenameIdentifier(file->filename());
vars["filename_base"] = file->filename_without_ext();
vars["message_header_ext"] = kCppGeneratorMessageHeaderExt;
printer->Print(vars, "// Generated by the gRPC C++ plugin.\n");
printer->Print(vars,
"// If you make any local change, they will be lost.\n");
printer->Print(vars, "// source: $filename$\n");
grpc::string leading_comments = file->GetLeadingComments("//");
if (!leading_comments.empty()) {
printer->Print(vars, "// Original file comments:\n");
printer->Print(leading_comments.c_str());
}
printer->Print(vars, "#ifndef GRPC_$filename_identifier$__INCLUDED\n");
printer->Print(vars, "#define GRPC_$filename_identifier$__INCLUDED\n");
printer->Print(vars, "\n");
printer->Print(vars, "#include \"$filename_base$$message_header_ext$\"\n");
printer->Print(vars, file->additional_headers().c_str());
printer->Print(vars, "\n");
}
return output;
}
grpc::string GetHeaderIncludes(grpc_generator::File *file,
const Parameters &params) {
grpc::string output;
{
// Scope the output stream so it closes and finalizes output to the string.
auto printer = file->CreatePrinter(&output);
std::map<grpc::string, grpc::string> vars;
static const char *headers_strs[] = {
"grpc++/impl/codegen/async_stream.h",
"grpc++/impl/codegen/async_unary_call.h",
"grpc++/impl/codegen/method_handler_impl.h",
"grpc++/impl/codegen/proto_utils.h",
"grpc++/impl/codegen/rpc_method.h",
"grpc++/impl/codegen/service_type.h",
"grpc++/impl/codegen/status.h",
"grpc++/impl/codegen/stub_options.h",
"grpc++/impl/codegen/sync_stream.h"};
std::vector<grpc::string> headers(headers_strs, array_end(headers_strs));
PrintIncludes(printer.get(), headers, params);
printer->Print(vars, "\n");
printer->Print(vars, "namespace grpc {\n");
printer->Print(vars, "class CompletionQueue;\n");
printer->Print(vars, "class Channel;\n");
printer->Print(vars, "class RpcService;\n");
printer->Print(vars, "class ServerCompletionQueue;\n");
printer->Print(vars, "class ServerContext;\n");
printer->Print(vars, "} // namespace grpc\n\n");
if (!file->package().empty()) {
std::vector<grpc::string> parts = file->package_parts();
for (auto part = parts.begin(); part != parts.end(); part++) {
vars["part"] = *part;
printer->Print(vars, "namespace $part$ {\n");
}
printer->Print(vars, "\n");
}
}
return output;
}
void PrintHeaderClientMethodInterfaces(
grpc_generator::Printer *printer, const grpc_generator::Method *method,
std::map<grpc::string, grpc::string> *vars, bool is_public) {
(*vars)["Method"] = method->name();
(*vars)["Request"] = method->input_type_name();
(*vars)["Response"] = method->output_type_name();
struct {
grpc::string prefix;
grpc::string method_params; // extra arguments to method
grpc::string raw_args; // extra arguments to raw version of method
} async_prefixes[] = {{"Async", ", void* tag", ", tag"},
{"PrepareAsync", "", ""}};
if (is_public) {
if (method->NoStreaming()) {
printer->Print(
*vars,
"virtual ::grpc::Status $Method$(::grpc::ClientContext* context, "
"const $Request$& request, $Response$* response) = 0;\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
printer->Print(
*vars,
"std::unique_ptr< "
"::grpc::ClientAsyncResponseReaderInterface< $Response$>> "
"$AsyncPrefix$$Method$(::grpc::ClientContext* context, "
"const $Request$& request, "
"::grpc::CompletionQueue* cq) {\n");
printer->Indent();
printer->Print(
*vars,
"return std::unique_ptr< "
"::grpc::ClientAsyncResponseReaderInterface< $Response$>>("
"$AsyncPrefix$$Method$Raw(context, request, cq));\n");
printer->Outdent();
printer->Print("}\n");
}
} else if (ClientOnlyStreaming(method)) {
printer->Print(
*vars,
"std::unique_ptr< ::grpc::ClientWriterInterface< $Request$>>"
" $Method$("
"::grpc::ClientContext* context, $Response$* response) {\n");
printer->Indent();
printer->Print(
*vars,
"return std::unique_ptr< ::grpc::ClientWriterInterface< $Request$>>"
"($Method$Raw(context, response));\n");
printer->Outdent();
printer->Print("}\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
(*vars)["AsyncRawArgs"] = async_prefix.raw_args;
printer->Print(
*vars,
"std::unique_ptr< ::grpc::ClientAsyncWriterInterface< $Request$>>"
" $AsyncPrefix$$Method$(::grpc::ClientContext* context, "
"$Response$* "
"response, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
printer->Indent();
printer->Print(*vars,
"return std::unique_ptr< "
"::grpc::ClientAsyncWriterInterface< $Request$>>("
"$AsyncPrefix$$Method$Raw(context, response, "
"cq$AsyncRawArgs$));\n");
printer->Outdent();
printer->Print("}\n");
}
} else if (ServerOnlyStreaming(method)) {
printer->Print(
*vars,
"std::unique_ptr< ::grpc::ClientReaderInterface< $Response$>>"
" $Method$(::grpc::ClientContext* context, const $Request$& request)"
" {\n");
printer->Indent();
printer->Print(
*vars,
"return std::unique_ptr< ::grpc::ClientReaderInterface< $Response$>>"
"($Method$Raw(context, request));\n");
printer->Outdent();
printer->Print("}\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
(*vars)["AsyncRawArgs"] = async_prefix.raw_args;
printer->Print(
*vars,
"std::unique_ptr< ::grpc::ClientAsyncReaderInterface< $Response$>> "
"$AsyncPrefix$$Method$("
"::grpc::ClientContext* context, const $Request$& request, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
printer->Indent();
printer->Print(
*vars,
"return std::unique_ptr< "
"::grpc::ClientAsyncReaderInterface< $Response$>>("
"$AsyncPrefix$$Method$Raw(context, request, cq$AsyncRawArgs$));\n");
printer->Outdent();
printer->Print("}\n");
}
} else if (method->BidiStreaming()) {
printer->Print(*vars,
"std::unique_ptr< ::grpc::ClientReaderWriterInterface< "
"$Request$, $Response$>> "
"$Method$(::grpc::ClientContext* context) {\n");
printer->Indent();
printer->Print(
*vars,
"return std::unique_ptr< "
"::grpc::ClientReaderWriterInterface< $Request$, $Response$>>("
"$Method$Raw(context));\n");
printer->Outdent();
printer->Print("}\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
(*vars)["AsyncRawArgs"] = async_prefix.raw_args;
printer->Print(
*vars,
"std::unique_ptr< "
"::grpc::ClientAsyncReaderWriterInterface< $Request$, $Response$>> "
"$AsyncPrefix$$Method$(::grpc::ClientContext* context, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
printer->Indent();
printer->Print(
*vars,
"return std::unique_ptr< "
"::grpc::ClientAsyncReaderWriterInterface< $Request$, $Response$>>("
"$AsyncPrefix$$Method$Raw(context, cq$AsyncRawArgs$));\n");
printer->Outdent();
printer->Print("}\n");
}
}
} else {
if (method->NoStreaming()) {
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
printer->Print(
*vars,
"virtual ::grpc::ClientAsyncResponseReaderInterface< $Response$>* "
"$AsyncPrefix$$Method$Raw(::grpc::ClientContext* context, "
"const $Request$& request, "
"::grpc::CompletionQueue* cq) = 0;\n");
}
} else if (ClientOnlyStreaming(method)) {
printer->Print(
*vars,
"virtual ::grpc::ClientWriterInterface< $Request$>*"
" $Method$Raw("
"::grpc::ClientContext* context, $Response$* response) = 0;\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
printer->Print(
*vars,
"virtual ::grpc::ClientAsyncWriterInterface< $Request$>*"
" $AsyncPrefix$$Method$Raw(::grpc::ClientContext* context, "
"$Response$* response, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$) = 0;\n");
}
} else if (ServerOnlyStreaming(method)) {
printer->Print(
*vars,
"virtual ::grpc::ClientReaderInterface< $Response$>* $Method$Raw("
"::grpc::ClientContext* context, const $Request$& request) = 0;\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
printer->Print(
*vars,
"virtual ::grpc::ClientAsyncReaderInterface< $Response$>* "
"$AsyncPrefix$$Method$Raw("
"::grpc::ClientContext* context, const $Request$& request, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$) = 0;\n");
}
} else if (method->BidiStreaming()) {
printer->Print(*vars,
"virtual ::grpc::ClientReaderWriterInterface< $Request$, "
"$Response$>* "
"$Method$Raw(::grpc::ClientContext* context) = 0;\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
printer->Print(
*vars,
"virtual ::grpc::ClientAsyncReaderWriterInterface< "
"$Request$, $Response$>* "
"$AsyncPrefix$$Method$Raw(::grpc::ClientContext* context, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$) = 0;\n");
}
}
}
}
void PrintHeaderClientMethod(grpc_generator::Printer *printer,
const grpc_generator::Method *method,
std::map<grpc::string, grpc::string> *vars,
bool is_public) {
(*vars)["Method"] = method->name();
(*vars)["Request"] = method->input_type_name();
(*vars)["Response"] = method->output_type_name();
struct {
grpc::string prefix;
grpc::string method_params; // extra arguments to method
grpc::string raw_args; // extra arguments to raw version of method
} async_prefixes[] = {{"Async", ", void* tag", ", tag"},
{"PrepareAsync", "", ""}};
if (is_public) {
if (method->NoStreaming()) {
printer->Print(
*vars,
"::grpc::Status $Method$(::grpc::ClientContext* context, "
"const $Request$& request, $Response$* response) override;\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
printer->Print(
*vars,
"std::unique_ptr< ::grpc::ClientAsyncResponseReader< $Response$>> "
"$AsyncPrefix$$Method$(::grpc::ClientContext* context, "
"const $Request$& request, "
"::grpc::CompletionQueue* cq) {\n");
printer->Indent();
printer->Print(*vars,
"return std::unique_ptr< "
"::grpc::ClientAsyncResponseReader< $Response$>>("
"$AsyncPrefix$$Method$Raw(context, request, cq));\n");
printer->Outdent();
printer->Print("}\n");
}
} else if (ClientOnlyStreaming(method)) {
printer->Print(
*vars,
"std::unique_ptr< ::grpc::ClientWriter< $Request$>>"
" $Method$("
"::grpc::ClientContext* context, $Response$* response) {\n");
printer->Indent();
printer->Print(*vars,
"return std::unique_ptr< ::grpc::ClientWriter< $Request$>>"
"($Method$Raw(context, response));\n");
printer->Outdent();
printer->Print("}\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
(*vars)["AsyncRawArgs"] = async_prefix.raw_args;
printer->Print(*vars,
"std::unique_ptr< ::grpc::ClientAsyncWriter< $Request$>>"
" $AsyncPrefix$$Method$(::grpc::ClientContext* context, "
"$Response$* response, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
printer->Indent();
printer->Print(
*vars,
"return std::unique_ptr< ::grpc::ClientAsyncWriter< $Request$>>("
"$AsyncPrefix$$Method$Raw(context, response, "
"cq$AsyncRawArgs$));\n");
printer->Outdent();
printer->Print("}\n");
}
} else if (ServerOnlyStreaming(method)) {
printer->Print(
*vars,
"std::unique_ptr< ::grpc::ClientReader< $Response$>>"
" $Method$(::grpc::ClientContext* context, const $Request$& request)"
" {\n");
printer->Indent();
printer->Print(
*vars,
"return std::unique_ptr< ::grpc::ClientReader< $Response$>>"
"($Method$Raw(context, request));\n");
printer->Outdent();
printer->Print("}\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
(*vars)["AsyncRawArgs"] = async_prefix.raw_args;
printer->Print(
*vars,
"std::unique_ptr< ::grpc::ClientAsyncReader< $Response$>> "
"$AsyncPrefix$$Method$("
"::grpc::ClientContext* context, const $Request$& request, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
printer->Indent();
printer->Print(
*vars,
"return std::unique_ptr< ::grpc::ClientAsyncReader< $Response$>>("
"$AsyncPrefix$$Method$Raw(context, request, cq$AsyncRawArgs$));\n");
printer->Outdent();
printer->Print("}\n");
}
} else if (method->BidiStreaming()) {
printer->Print(
*vars,
"std::unique_ptr< ::grpc::ClientReaderWriter< $Request$, $Response$>>"
" $Method$(::grpc::ClientContext* context) {\n");
printer->Indent();
printer->Print(*vars,
"return std::unique_ptr< "
"::grpc::ClientReaderWriter< $Request$, $Response$>>("
"$Method$Raw(context));\n");
printer->Outdent();
printer->Print("}\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
(*vars)["AsyncRawArgs"] = async_prefix.raw_args;
printer->Print(*vars,
"std::unique_ptr< ::grpc::ClientAsyncReaderWriter< "
"$Request$, $Response$>> "
"$AsyncPrefix$$Method$(::grpc::ClientContext* context, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
printer->Indent();
printer->Print(
*vars,
"return std::unique_ptr< "
"::grpc::ClientAsyncReaderWriter< $Request$, $Response$>>("
"$AsyncPrefix$$Method$Raw(context, cq$AsyncRawArgs$));\n");
printer->Outdent();
printer->Print("}\n");
}
}
} else {
if (method->NoStreaming()) {
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
printer->Print(
*vars,
"::grpc::ClientAsyncResponseReader< $Response$>* "
"$AsyncPrefix$$Method$Raw(::grpc::ClientContext* context, "
"const $Request$& request, "
"::grpc::CompletionQueue* cq) override;\n");
}
} else if (ClientOnlyStreaming(method)) {
printer->Print(*vars,
"::grpc::ClientWriter< $Request$>* $Method$Raw("
"::grpc::ClientContext* context, $Response$* response) "
"override;\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
(*vars)["AsyncRawArgs"] = async_prefix.raw_args;
printer->Print(
*vars,
"::grpc::ClientAsyncWriter< $Request$>* $AsyncPrefix$$Method$Raw("
"::grpc::ClientContext* context, $Response$* response, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$) override;\n");
}
} else if (ServerOnlyStreaming(method)) {
printer->Print(*vars,
"::grpc::ClientReader< $Response$>* $Method$Raw("
"::grpc::ClientContext* context, const $Request$& request)"
" override;\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
(*vars)["AsyncRawArgs"] = async_prefix.raw_args;
printer->Print(
*vars,
"::grpc::ClientAsyncReader< $Response$>* $AsyncPrefix$$Method$Raw("
"::grpc::ClientContext* context, const $Request$& request, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$) override;\n");
}
} else if (method->BidiStreaming()) {
printer->Print(*vars,
"::grpc::ClientReaderWriter< $Request$, $Response$>* "
"$Method$Raw(::grpc::ClientContext* context) override;\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
(*vars)["AsyncRawArgs"] = async_prefix.raw_args;
printer->Print(
*vars,
"::grpc::ClientAsyncReaderWriter< $Request$, $Response$>* "
"$AsyncPrefix$$Method$Raw(::grpc::ClientContext* context, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$) override;\n");
}
}
}
}
void PrintHeaderClientMethodData(grpc_generator::Printer *printer,
const grpc_generator::Method *method,
std::map<grpc::string, grpc::string> *vars) {
(*vars)["Method"] = method->name();
printer->Print(*vars, "const ::grpc::RpcMethod rpcmethod_$Method$_;\n");
}
void PrintHeaderServerMethodSync(grpc_generator::Printer *printer,
const grpc_generator::Method *method,
std::map<grpc::string, grpc::string> *vars) {
(*vars)["Method"] = method->name();
(*vars)["Request"] = method->input_type_name();
(*vars)["Response"] = method->output_type_name();
printer->Print(method->GetLeadingComments("//").c_str());
if (method->NoStreaming()) {
printer->Print(*vars,
"virtual ::grpc::Status $Method$("
"::grpc::ServerContext* context, const $Request$* request, "
"$Response$* response);\n");
} else if (ClientOnlyStreaming(method)) {
printer->Print(*vars,
"virtual ::grpc::Status $Method$("
"::grpc::ServerContext* context, "
"::grpc::ServerReader< $Request$>* reader, "
"$Response$* response);\n");
} else if (ServerOnlyStreaming(method)) {
printer->Print(*vars,
"virtual ::grpc::Status $Method$("
"::grpc::ServerContext* context, const $Request$* request, "
"::grpc::ServerWriter< $Response$>* writer);\n");
} else if (method->BidiStreaming()) {
printer->Print(
*vars,
"virtual ::grpc::Status $Method$("
"::grpc::ServerContext* context, "
"::grpc::ServerReaderWriter< $Response$, $Request$>* stream);"
"\n");
}
printer->Print(method->GetTrailingComments("//").c_str());
}
void PrintHeaderServerMethodAsync(grpc_generator::Printer *printer,
const grpc_generator::Method *method,
std::map<grpc::string, grpc::string> *vars) {
(*vars)["Method"] = method->name();
(*vars)["Request"] = method->input_type_name();
(*vars)["Response"] = method->output_type_name();
printer->Print(*vars, "template <class BaseClass>\n");
printer->Print(*vars,
"class WithAsyncMethod_$Method$ : public BaseClass {\n");
printer->Print(
" private:\n"
" void BaseClassMustBeDerivedFromService(const Service *service) {}\n");
printer->Print(" public:\n");
printer->Indent();
printer->Print(*vars,
"WithAsyncMethod_$Method$() {\n"
" ::grpc::Service::MarkMethodAsync($Idx$);\n"
"}\n");
printer->Print(*vars,
"~WithAsyncMethod_$Method$() override {\n"
" BaseClassMustBeDerivedFromService(this);\n"
"}\n");
if (method->NoStreaming()) {
printer->Print(
*vars,
"// disable synchronous version of this method\n"
"::grpc::Status $Method$("
"::grpc::ServerContext* context, const $Request$* request, "
"$Response$* response) final override {\n"
" abort();\n"
" return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
"}\n");
printer->Print(
*vars,
"void Request$Method$("
"::grpc::ServerContext* context, $Request$* request, "
"::grpc::ServerAsyncResponseWriter< $Response$>* response, "
"::grpc::CompletionQueue* new_call_cq, "
"::grpc::ServerCompletionQueue* notification_cq, void *tag) {\n");
printer->Print(*vars,
" ::grpc::Service::RequestAsyncUnary($Idx$, context, "
"request, response, new_call_cq, notification_cq, tag);\n");
printer->Print("}\n");
} else if (ClientOnlyStreaming(method)) {
printer->Print(
*vars,
"// disable synchronous version of this method\n"
"::grpc::Status $Method$("
"::grpc::ServerContext* context, "
"::grpc::ServerReader< $Request$>* reader, "
"$Response$* response) final override {\n"
" abort();\n"
" return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
"}\n");
printer->Print(
*vars,
"void Request$Method$("
"::grpc::ServerContext* context, "
"::grpc::ServerAsyncReader< $Response$, $Request$>* reader, "
"::grpc::CompletionQueue* new_call_cq, "
"::grpc::ServerCompletionQueue* notification_cq, void *tag) {\n");
printer->Print(*vars,
" ::grpc::Service::RequestAsyncClientStreaming($Idx$, "
"context, reader, new_call_cq, notification_cq, tag);\n");
printer->Print("}\n");
} else if (ServerOnlyStreaming(method)) {
printer->Print(
*vars,
"// disable synchronous version of this method\n"
"::grpc::Status $Method$("
"::grpc::ServerContext* context, const $Request$* request, "
"::grpc::ServerWriter< $Response$>* writer) final override "
"{\n"
" abort();\n"
" return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
"}\n");
printer->Print(
*vars,
"void Request$Method$("
"::grpc::ServerContext* context, $Request$* request, "
"::grpc::ServerAsyncWriter< $Response$>* writer, "
"::grpc::CompletionQueue* new_call_cq, "
"::grpc::ServerCompletionQueue* notification_cq, void *tag) {\n");
printer->Print(
*vars,
" ::grpc::Service::RequestAsyncServerStreaming($Idx$, "
"context, request, writer, new_call_cq, notification_cq, tag);\n");
printer->Print("}\n");
} else if (method->BidiStreaming()) {
printer->Print(
*vars,
"// disable synchronous version of this method\n"
"::grpc::Status $Method$("
"::grpc::ServerContext* context, "
"::grpc::ServerReaderWriter< $Response$, $Request$>* stream) "
"final override {\n"
" abort();\n"
" return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
"}\n");
printer->Print(
*vars,
"void Request$Method$("
"::grpc::ServerContext* context, "
"::grpc::ServerAsyncReaderWriter< $Response$, $Request$>* stream, "
"::grpc::CompletionQueue* new_call_cq, "
"::grpc::ServerCompletionQueue* notification_cq, void *tag) {\n");
printer->Print(*vars,
" ::grpc::Service::RequestAsyncBidiStreaming($Idx$, "
"context, stream, new_call_cq, notification_cq, tag);\n");
printer->Print("}\n");
}
printer->Outdent();
printer->Print(*vars, "};\n");
}
void PrintHeaderServerMethodStreamedUnary(
grpc_generator::Printer *printer, const grpc_generator::Method *method,
std::map<grpc::string, grpc::string> *vars) {
(*vars)["Method"] = method->name();
(*vars)["Request"] = method->input_type_name();
(*vars)["Response"] = method->output_type_name();
if (method->NoStreaming()) {
printer->Print(*vars, "template <class BaseClass>\n");
printer->Print(*vars,
"class WithStreamedUnaryMethod_$Method$ : "
"public BaseClass {\n");
printer->Print(
" private:\n"
" void BaseClassMustBeDerivedFromService(const Service *service) "
"{}\n");
printer->Print(" public:\n");
printer->Indent();
printer->Print(*vars,
"WithStreamedUnaryMethod_$Method$() {\n"
" ::grpc::Service::MarkMethodStreamed($Idx$,\n"
" new ::grpc::StreamedUnaryHandler< $Request$, "
"$Response$>(std::bind"
"(&WithStreamedUnaryMethod_$Method$<BaseClass>::"
"Streamed$Method$, this, std::placeholders::_1, "
"std::placeholders::_2)));\n"
"}\n");
printer->Print(*vars,
"~WithStreamedUnaryMethod_$Method$() override {\n"
" BaseClassMustBeDerivedFromService(this);\n"
"}\n");
printer->Print(
*vars,
"// disable regular version of this method\n"
"::grpc::Status $Method$("
"::grpc::ServerContext* context, const $Request$* request, "
"$Response$* response) final override {\n"
" abort();\n"
" return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
"}\n");
printer->Print(*vars,
"// replace default version of method with streamed unary\n"
"virtual ::grpc::Status Streamed$Method$("
"::grpc::ServerContext* context, "
"::grpc::ServerUnaryStreamer< "
"$Request$,$Response$>* server_unary_streamer)"
" = 0;\n");
printer->Outdent();
printer->Print(*vars, "};\n");
}
}
void PrintHeaderServerMethodSplitStreaming(
grpc_generator::Printer *printer, const grpc_generator::Method *method,
std::map<grpc::string, grpc::string> *vars) {
(*vars)["Method"] = method->name();
(*vars)["Request"] = method->input_type_name();
(*vars)["Response"] = method->output_type_name();
if (ServerOnlyStreaming(method)) {
printer->Print(*vars, "template <class BaseClass>\n");
printer->Print(*vars,
"class WithSplitStreamingMethod_$Method$ : "
"public BaseClass {\n");
printer->Print(
" private:\n"
" void BaseClassMustBeDerivedFromService(const Service *service) "
"{}\n");
printer->Print(" public:\n");
printer->Indent();
printer->Print(*vars,
"WithSplitStreamingMethod_$Method$() {\n"
" ::grpc::Service::MarkMethodStreamed($Idx$,\n"
" new ::grpc::SplitServerStreamingHandler< $Request$, "
"$Response$>(std::bind"
"(&WithSplitStreamingMethod_$Method$<BaseClass>::"
"Streamed$Method$, this, std::placeholders::_1, "
"std::placeholders::_2)));\n"
"}\n");
printer->Print(*vars,
"~WithSplitStreamingMethod_$Method$() override {\n"
" BaseClassMustBeDerivedFromService(this);\n"
"}\n");
printer->Print(
*vars,
"// disable regular version of this method\n"
"::grpc::Status $Method$("
"::grpc::ServerContext* context, const $Request$* request, "
"::grpc::ServerWriter< $Response$>* writer) final override "
"{\n"
" abort();\n"
" return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
"}\n");
printer->Print(*vars,
"// replace default version of method with split streamed\n"
"virtual ::grpc::Status Streamed$Method$("
"::grpc::ServerContext* context, "
"::grpc::ServerSplitStreamer< "
"$Request$,$Response$>* server_split_streamer)"
" = 0;\n");
printer->Outdent();
printer->Print(*vars, "};\n");
}
}
void PrintHeaderServerMethodGeneric(
grpc_generator::Printer *printer, const grpc_generator::Method *method,
std::map<grpc::string, grpc::string> *vars) {
(*vars)["Method"] = method->name();
(*vars)["Request"] = method->input_type_name();
(*vars)["Response"] = method->output_type_name();
printer->Print(*vars, "template <class BaseClass>\n");
printer->Print(*vars,
"class WithGenericMethod_$Method$ : public BaseClass {\n");
printer->Print(
" private:\n"
" void BaseClassMustBeDerivedFromService(const Service *service) {}\n");
printer->Print(" public:\n");
printer->Indent();
printer->Print(*vars,
"WithGenericMethod_$Method$() {\n"
" ::grpc::Service::MarkMethodGeneric($Idx$);\n"
"}\n");
printer->Print(*vars,
"~WithGenericMethod_$Method$() override {\n"
" BaseClassMustBeDerivedFromService(this);\n"
"}\n");
if (method->NoStreaming()) {
printer->Print(
*vars,
"// disable synchronous version of this method\n"
"::grpc::Status $Method$("
"::grpc::ServerContext* context, const $Request$* request, "
"$Response$* response) final override {\n"
" abort();\n"
" return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
"}\n");
} else if (ClientOnlyStreaming(method)) {
printer->Print(
*vars,
"// disable synchronous version of this method\n"
"::grpc::Status $Method$("
"::grpc::ServerContext* context, "
"::grpc::ServerReader< $Request$>* reader, "
"$Response$* response) final override {\n"
" abort();\n"
" return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
"}\n");
} else if (ServerOnlyStreaming(method)) {
printer->Print(
*vars,
"// disable synchronous version of this method\n"
"::grpc::Status $Method$("
"::grpc::ServerContext* context, const $Request$* request, "
"::grpc::ServerWriter< $Response$>* writer) final override "
"{\n"
" abort();\n"
" return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
"}\n");
} else if (method->BidiStreaming()) {
printer->Print(
*vars,
"// disable synchronous version of this method\n"
"::grpc::Status $Method$("
"::grpc::ServerContext* context, "
"::grpc::ServerReaderWriter< $Response$, $Request$>* stream) "
"final override {\n"
" abort();\n"
" return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, \"\");\n"
"}\n");
}
printer->Outdent();
printer->Print(*vars, "};\n");
}
void PrintHeaderService(grpc_generator::Printer *printer,
const grpc_generator::Service *service,
std::map<grpc::string, grpc::string> *vars) {
(*vars)["Service"] = service->name();
printer->Print(service->GetLeadingComments("//").c_str());
printer->Print(*vars,
"class $Service$ final {\n"
" public:\n");
printer->Indent();
// Service metadata
printer->Print(*vars,
"static constexpr char const* service_full_name() {\n"
" return \"$Package$$Service$\";\n"
"}\n");
// Client side
printer->Print(
"class StubInterface {\n"
" public:\n");
printer->Indent();
printer->Print("virtual ~StubInterface() {}\n");
for (int i = 0; i < service->method_count(); ++i) {
printer->Print(service->method(i)->GetLeadingComments("//").c_str());
PrintHeaderClientMethodInterfaces(printer, service->method(i).get(), vars,
true);
printer->Print(service->method(i)->GetTrailingComments("//").c_str());
}
printer->Outdent();
printer->Print("private:\n");
printer->Indent();
for (int i = 0; i < service->method_count(); ++i) {
PrintHeaderClientMethodInterfaces(printer, service->method(i).get(), vars,
false);
}
printer->Outdent();
printer->Print("};\n");
printer->Print(
"class Stub final : public StubInterface"
" {\n public:\n");
printer->Indent();
printer->Print(
"Stub(const std::shared_ptr< ::grpc::ChannelInterface>& channel);\n");
for (int i = 0; i < service->method_count(); ++i) {
PrintHeaderClientMethod(printer, service->method(i).get(), vars, true);
}
printer->Outdent();
printer->Print("\n private:\n");
printer->Indent();
printer->Print("std::shared_ptr< ::grpc::ChannelInterface> channel_;\n");
for (int i = 0; i < service->method_count(); ++i) {
PrintHeaderClientMethod(printer, service->method(i).get(), vars, false);
}
for (int i = 0; i < service->method_count(); ++i) {
PrintHeaderClientMethodData(printer, service->method(i).get(), vars);
}
printer->Outdent();
printer->Print("};\n");
printer->Print(
"static std::unique_ptr<Stub> NewStub(const std::shared_ptr< "
"::grpc::ChannelInterface>& channel, "
"const ::grpc::StubOptions& options = ::grpc::StubOptions());\n");
printer->Print("\n");
// Server side - base
printer->Print(
"class Service : public ::grpc::Service {\n"
" public:\n");
printer->Indent();
printer->Print("Service();\n");
printer->Print("virtual ~Service();\n");
for (int i = 0; i < service->method_count(); ++i) {
PrintHeaderServerMethodSync(printer, service->method(i).get(), vars);
}
printer->Outdent();
printer->Print("};\n");
// Server side - Asynchronous
for (int i = 0; i < service->method_count(); ++i) {
(*vars)["Idx"] = as_string(i);
PrintHeaderServerMethodAsync(printer, service->method(i).get(), vars);
}
printer->Print("typedef ");
for (int i = 0; i < service->method_count(); ++i) {
(*vars)["method_name"] = service->method(i).get()->name();
printer->Print(*vars, "WithAsyncMethod_$method_name$<");
}
printer->Print("Service");
for (int i = 0; i < service->method_count(); ++i) {
printer->Print(" >");
}
printer->Print(" AsyncService;\n");
// Server side - Generic
for (int i = 0; i < service->method_count(); ++i) {
(*vars)["Idx"] = as_string(i);
PrintHeaderServerMethodGeneric(printer, service->method(i).get(), vars);
}
// Server side - Streamed Unary
for (int i = 0; i < service->method_count(); ++i) {
(*vars)["Idx"] = as_string(i);
PrintHeaderServerMethodStreamedUnary(printer, service->method(i).get(),
vars);
}
printer->Print("typedef ");
for (int i = 0; i < service->method_count(); ++i) {
(*vars)["method_name"] = service->method(i).get()->name();
if (service->method(i)->NoStreaming()) {
printer->Print(*vars, "WithStreamedUnaryMethod_$method_name$<");
}
}
printer->Print("Service");
for (int i = 0; i < service->method_count(); ++i) {
if (service->method(i)->NoStreaming()) {
printer->Print(" >");
}
}
printer->Print(" StreamedUnaryService;\n");
// Server side - controlled server-side streaming
for (int i = 0; i < service->method_count(); ++i) {
(*vars)["Idx"] = as_string(i);
PrintHeaderServerMethodSplitStreaming(printer, service->method(i).get(),
vars);
}
printer->Print("typedef ");
for (int i = 0; i < service->method_count(); ++i) {
(*vars)["method_name"] = service->method(i).get()->name();
auto method = service->method(i);
if (ServerOnlyStreaming(method.get())) {
printer->Print(*vars, "WithSplitStreamingMethod_$method_name$<");
}
}
printer->Print("Service");
for (int i = 0; i < service->method_count(); ++i) {
auto method = service->method(i);
if (ServerOnlyStreaming(method.get())) {
printer->Print(" >");
}
}
printer->Print(" SplitStreamedService;\n");
// Server side - typedef for controlled both unary and server-side streaming
printer->Print("typedef ");
for (int i = 0; i < service->method_count(); ++i) {
(*vars)["method_name"] = service->method(i).get()->name();
auto method = service->method(i);
if (ServerOnlyStreaming(method.get())) {
printer->Print(*vars, "WithSplitStreamingMethod_$method_name$<");
}
if (service->method(i)->NoStreaming()) {
printer->Print(*vars, "WithStreamedUnaryMethod_$method_name$<");
}
}
printer->Print("Service");
for (int i = 0; i < service->method_count(); ++i) {
auto method = service->method(i);
if (service->method(i)->NoStreaming() ||
ServerOnlyStreaming(method.get())) {
printer->Print(" >");
}
}
printer->Print(" StreamedService;\n");
printer->Outdent();
printer->Print("};\n");
printer->Print(service->GetTrailingComments("//").c_str());
}
grpc::string GetHeaderServices(grpc_generator::File *file,
const Parameters &params) {
grpc::string output;
{
// Scope the output stream so it closes and finalizes output to the string.
auto printer = file->CreatePrinter(&output);
std::map<grpc::string, grpc::string> vars;
// Package string is empty or ends with a dot. It is used to fully qualify
// method names.
vars["Package"] = file->package();
if (!file->package().empty()) {
vars["Package"].append(".");
}
if (!params.services_namespace.empty()) {
vars["services_namespace"] = params.services_namespace;
printer->Print(vars, "\nnamespace $services_namespace$ {\n\n");
}
for (int i = 0; i < file->service_count(); ++i) {
PrintHeaderService(printer.get(), file->service(i).get(), &vars);
printer->Print("\n");
}
if (!params.services_namespace.empty()) {
printer->Print(vars, "} // namespace $services_namespace$\n\n");
}
}
return output;
}
grpc::string GetHeaderEpilogue(grpc_generator::File *file,
const Parameters & /*params*/) {
grpc::string output;
{
// Scope the output stream so it closes and finalizes output to the string.
auto printer = file->CreatePrinter(&output);
std::map<grpc::string, grpc::string> vars;
vars["filename"] = file->filename();
vars["filename_identifier"] = FilenameIdentifier(file->filename());
if (!file->package().empty()) {
std::vector<grpc::string> parts = file->package_parts();
for (auto part = parts.rbegin(); part != parts.rend(); part++) {
vars["part"] = *part;
printer->Print(vars, "} // namespace $part$\n");
}
printer->Print(vars, "\n");
}
printer->Print(vars, "\n");
printer->Print(vars, "#endif // GRPC_$filename_identifier$__INCLUDED\n");
printer->Print(file->GetTrailingComments("//").c_str());
}
return output;
}
grpc::string GetSourcePrologue(grpc_generator::File *file,
const Parameters & /*params*/) {
grpc::string output;
{
// Scope the output stream so it closes and finalizes output to the string.
auto printer = file->CreatePrinter(&output);
std::map<grpc::string, grpc::string> vars;
vars["filename"] = file->filename();
vars["filename_base"] = file->filename_without_ext();
vars["message_header_ext"] = kCppGeneratorMessageHeaderExt;
vars["service_header_ext"] = kCppGeneratorServiceHeaderExt;
printer->Print(vars, "// Generated by the gRPC C++ plugin.\n");
printer->Print(vars,
"// If you make any local change, they will be lost.\n");
printer->Print(vars, "// source: $filename$\n\n");
printer->Print(vars, "#include \"$filename_base$$message_header_ext$\"\n");
printer->Print(vars, "#include \"$filename_base$$service_header_ext$\"\n");
printer->Print(vars, "\n");
}
return output;
}
grpc::string GetSourceIncludes(grpc_generator::File *file,
const Parameters &params) {
grpc::string output;
{
// Scope the output stream so it closes and finalizes output to the string.
auto printer = file->CreatePrinter(&output);
std::map<grpc::string, grpc::string> vars;
static const char *headers_strs[] = {
"grpc++/impl/codegen/async_stream.h",
"grpc++/impl/codegen/async_unary_call.h",
"grpc++/impl/codegen/channel_interface.h",
"grpc++/impl/codegen/client_unary_call.h",
"grpc++/impl/codegen/method_handler_impl.h",
"grpc++/impl/codegen/rpc_service_method.h",
"grpc++/impl/codegen/service_type.h",
"grpc++/impl/codegen/sync_stream.h"};
std::vector<grpc::string> headers(headers_strs, array_end(headers_strs));
PrintIncludes(printer.get(), headers, params);
if (!file->package().empty()) {
std::vector<grpc::string> parts = file->package_parts();
for (auto part = parts.begin(); part != parts.end(); part++) {
vars["part"] = *part;
printer->Print(vars, "namespace $part$ {\n");
}
}
printer->Print(vars, "\n");
}
return output;
}
void PrintSourceClientMethod(grpc_generator::Printer *printer,
const grpc_generator::Method *method,
std::map<grpc::string, grpc::string> *vars) {
(*vars)["Method"] = method->name();
(*vars)["Request"] = method->input_type_name();
(*vars)["Response"] = method->output_type_name();
struct {
grpc::string prefix;
grpc::string start; // bool literal expressed as string
grpc::string method_params; // extra arguments to method
grpc::string create_args; // extra arguments to creator
} async_prefixes[] = {{"Async", "true", ", void* tag", ", tag"},
{"PrepareAsync", "false", "", ", nullptr"}};
if (method->NoStreaming()) {
printer->Print(*vars,
"::grpc::Status $ns$$Service$::Stub::$Method$("
"::grpc::ClientContext* context, "
"const $Request$& request, $Response$* response) {\n");
printer->Print(*vars,
" return ::grpc::BlockingUnaryCall(channel_.get(), "
"rpcmethod_$Method$_, "
"context, request, response);\n"
"}\n\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncStart"] = async_prefix.start;
printer->Print(*vars,
"::grpc::ClientAsyncResponseReader< $Response$>* "
"$ns$$Service$::Stub::$AsyncPrefix$$Method$Raw(::grpc::"
"ClientContext* context, "
"const $Request$& request, "
"::grpc::CompletionQueue* cq) {\n");
printer->Print(*vars,
" return "
"::grpc::ClientAsyncResponseReader< $Response$>::Create("
"channel_.get(), cq, "
"rpcmethod_$Method$_, "
"context, request, $AsyncStart$);\n"
"}\n\n");
}
} else if (ClientOnlyStreaming(method)) {
printer->Print(*vars,
"::grpc::ClientWriter< $Request$>* "
"$ns$$Service$::Stub::$Method$Raw("
"::grpc::ClientContext* context, $Response$* response) {\n");
printer->Print(*vars,
" return new ::grpc::ClientWriter< $Request$>("
"channel_.get(), "
"rpcmethod_$Method$_, "
"context, response);\n"
"}\n\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncStart"] = async_prefix.start;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
(*vars)["AsyncCreateArgs"] = async_prefix.create_args;
printer->Print(*vars,
"::grpc::ClientAsyncWriter< $Request$>* "
"$ns$$Service$::Stub::$AsyncPrefix$$Method$Raw("
"::grpc::ClientContext* context, $Response$* response, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
printer->Print(*vars,
" return ::grpc::ClientAsyncWriter< $Request$>::Create("
"channel_.get(), cq, "
"rpcmethod_$Method$_, "
"context, response, $AsyncStart$$AsyncCreateArgs$);\n"
"}\n\n");
}
} else if (ServerOnlyStreaming(method)) {
printer->Print(
*vars,
"::grpc::ClientReader< $Response$>* "
"$ns$$Service$::Stub::$Method$Raw("
"::grpc::ClientContext* context, const $Request$& request) {\n");
printer->Print(*vars,
" return new ::grpc::ClientReader< $Response$>("
"channel_.get(), "
"rpcmethod_$Method$_, "
"context, request);\n"
"}\n\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncStart"] = async_prefix.start;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
(*vars)["AsyncCreateArgs"] = async_prefix.create_args;
printer->Print(
*vars,
"::grpc::ClientAsyncReader< $Response$>* "
"$ns$$Service$::Stub::$AsyncPrefix$$Method$Raw("
"::grpc::ClientContext* context, const $Request$& request, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
printer->Print(*vars,
" return ::grpc::ClientAsyncReader< $Response$>::Create("
"channel_.get(), cq, "
"rpcmethod_$Method$_, "
"context, request, $AsyncStart$$AsyncCreateArgs$);\n"
"}\n\n");
}
} else if (method->BidiStreaming()) {
printer->Print(
*vars,
"::grpc::ClientReaderWriter< $Request$, $Response$>* "
"$ns$$Service$::Stub::$Method$Raw(::grpc::ClientContext* context) {\n");
printer->Print(*vars,
" return new ::grpc::ClientReaderWriter< "
"$Request$, $Response$>("
"channel_.get(), "
"rpcmethod_$Method$_, "
"context);\n"
"}\n\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncStart"] = async_prefix.start;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
(*vars)["AsyncCreateArgs"] = async_prefix.create_args;
printer->Print(*vars,
"::grpc::ClientAsyncReaderWriter< $Request$, $Response$>* "
"$ns$$Service$::Stub::$AsyncPrefix$$Method$Raw(::grpc::"
"ClientContext* context, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$) {\n");
printer->Print(
*vars,
" return "
"::grpc::ClientAsyncReaderWriter< $Request$, $Response$>::Create("
"channel_.get(), cq, "
"rpcmethod_$Method$_, "
"context, $AsyncStart$$AsyncCreateArgs$);\n"
"}\n\n");
}
}
}
void PrintSourceServerMethod(grpc_generator::Printer *printer,
const grpc_generator::Method *method,
std::map<grpc::string, grpc::string> *vars) {
(*vars)["Method"] = method->name();
(*vars)["Request"] = method->input_type_name();
(*vars)["Response"] = method->output_type_name();
if (method->NoStreaming()) {
printer->Print(*vars,
"::grpc::Status $ns$$Service$::Service::$Method$("
"::grpc::ServerContext* context, "
"const $Request$* request, $Response$* response) {\n");
printer->Print(" (void) context;\n");
printer->Print(" (void) request;\n");
printer->Print(" (void) response;\n");
printer->Print(
" return ::grpc::Status("
"::grpc::StatusCode::UNIMPLEMENTED, \"\");\n");
printer->Print("}\n\n");
} else if (ClientOnlyStreaming(method)) {
printer->Print(*vars,
"::grpc::Status $ns$$Service$::Service::$Method$("
"::grpc::ServerContext* context, "
"::grpc::ServerReader< $Request$>* reader, "
"$Response$* response) {\n");
printer->Print(" (void) context;\n");
printer->Print(" (void) reader;\n");
printer->Print(" (void) response;\n");
printer->Print(
" return ::grpc::Status("
"::grpc::StatusCode::UNIMPLEMENTED, \"\");\n");
printer->Print("}\n\n");
} else if (ServerOnlyStreaming(method)) {
printer->Print(*vars,
"::grpc::Status $ns$$Service$::Service::$Method$("
"::grpc::ServerContext* context, "
"const $Request$* request, "
"::grpc::ServerWriter< $Response$>* writer) {\n");
printer->Print(" (void) context;\n");
printer->Print(" (void) request;\n");
printer->Print(" (void) writer;\n");
printer->Print(
" return ::grpc::Status("
"::grpc::StatusCode::UNIMPLEMENTED, \"\");\n");
printer->Print("}\n\n");
} else if (method->BidiStreaming()) {
printer->Print(*vars,
"::grpc::Status $ns$$Service$::Service::$Method$("
"::grpc::ServerContext* context, "
"::grpc::ServerReaderWriter< $Response$, $Request$>* "
"stream) {\n");
printer->Print(" (void) context;\n");
printer->Print(" (void) stream;\n");
printer->Print(
" return ::grpc::Status("
"::grpc::StatusCode::UNIMPLEMENTED, \"\");\n");
printer->Print("}\n\n");
}
}
void PrintSourceService(grpc_generator::Printer *printer,
const grpc_generator::Service *service,
std::map<grpc::string, grpc::string> *vars) {
(*vars)["Service"] = service->name();
if (service->method_count() > 0) {
printer->Print(*vars,
"static const char* $prefix$$Service$_method_names[] = {\n");
for (int i = 0; i < service->method_count(); ++i) {
(*vars)["Method"] = service->method(i).get()->name();
printer->Print(*vars, " \"/$Package$$Service$/$Method$\",\n");
}
printer->Print(*vars, "};\n\n");
}
printer->Print(*vars,
"std::unique_ptr< $ns$$Service$::Stub> $ns$$Service$::NewStub("
"const std::shared_ptr< ::grpc::ChannelInterface>& channel, "
"const ::grpc::StubOptions& options) {\n"
" std::unique_ptr< $ns$$Service$::Stub> stub(new "
"$ns$$Service$::Stub(channel));\n"
" return stub;\n"
"}\n\n");
printer->Print(*vars,
"$ns$$Service$::Stub::Stub(const std::shared_ptr< "
"::grpc::ChannelInterface>& channel)\n");
printer->Indent();
printer->Print(": channel_(channel)");
for (int i = 0; i < service->method_count(); ++i) {
auto method = service->method(i);
(*vars)["Method"] = method->name();
(*vars)["Idx"] = as_string(i);
if (method->NoStreaming()) {
(*vars)["StreamingType"] = "NORMAL_RPC";
// NOTE: There is no reason to consider streamed-unary as a separate
// category here since this part is setting up the client-side stub
// and this appears as a NORMAL_RPC from the client-side.
} else if (ClientOnlyStreaming(method.get())) {
(*vars)["StreamingType"] = "CLIENT_STREAMING";
} else if (ServerOnlyStreaming(method.get())) {
(*vars)["StreamingType"] = "SERVER_STREAMING";
} else {
(*vars)["StreamingType"] = "BIDI_STREAMING";
}
printer->Print(*vars,
", rpcmethod_$Method$_("
"$prefix$$Service$_method_names[$Idx$], "
"::grpc::RpcMethod::$StreamingType$, "
"channel"
")\n");
}
printer->Print("{}\n\n");
printer->Outdent();
for (int i = 0; i < service->method_count(); ++i) {
(*vars)["Idx"] = as_string(i);
PrintSourceClientMethod(printer, service->method(i).get(), vars);
}
printer->Print(*vars, "$ns$$Service$::Service::Service() {\n");
printer->Indent();
for (int i = 0; i < service->method_count(); ++i) {
auto method = service->method(i);
(*vars)["Idx"] = as_string(i);
(*vars)["Method"] = method->name();
(*vars)["Request"] = method->input_type_name();
(*vars)["Response"] = method->output_type_name();
if (method->NoStreaming()) {
printer->Print(
*vars,
"AddMethod(new ::grpc::RpcServiceMethod(\n"
" $prefix$$Service$_method_names[$Idx$],\n"
" ::grpc::RpcMethod::NORMAL_RPC,\n"
" new ::grpc::RpcMethodHandler< $ns$$Service$::Service, "
"$Request$, "
"$Response$>(\n"
" std::mem_fn(&$ns$$Service$::Service::$Method$), this)));\n");
} else if (ClientOnlyStreaming(method.get())) {
printer->Print(
*vars,
"AddMethod(new ::grpc::RpcServiceMethod(\n"
" $prefix$$Service$_method_names[$Idx$],\n"
" ::grpc::RpcMethod::CLIENT_STREAMING,\n"
" new ::grpc::ClientStreamingHandler< "
"$ns$$Service$::Service, $Request$, $Response$>(\n"
" std::mem_fn(&$ns$$Service$::Service::$Method$), this)));\n");
} else if (ServerOnlyStreaming(method.get())) {
printer->Print(
*vars,
"AddMethod(new ::grpc::RpcServiceMethod(\n"
" $prefix$$Service$_method_names[$Idx$],\n"
" ::grpc::RpcMethod::SERVER_STREAMING,\n"
" new ::grpc::ServerStreamingHandler< "
"$ns$$Service$::Service, $Request$, $Response$>(\n"
" std::mem_fn(&$ns$$Service$::Service::$Method$), this)));\n");
} else if (method->BidiStreaming()) {
printer->Print(
*vars,
"AddMethod(new ::grpc::RpcServiceMethod(\n"
" $prefix$$Service$_method_names[$Idx$],\n"
" ::grpc::RpcMethod::BIDI_STREAMING,\n"
" new ::grpc::BidiStreamingHandler< "
"$ns$$Service$::Service, $Request$, $Response$>(\n"
" std::mem_fn(&$ns$$Service$::Service::$Method$), this)));\n");
}
}
printer->Outdent();
printer->Print(*vars, "}\n\n");
printer->Print(*vars,
"$ns$$Service$::Service::~Service() {\n"
"}\n\n");
for (int i = 0; i < service->method_count(); ++i) {
(*vars)["Idx"] = as_string(i);
PrintSourceServerMethod(printer, service->method(i).get(), vars);
}
}
grpc::string GetSourceServices(grpc_generator::File *file,
const Parameters &params) {
grpc::string output;
{
// Scope the output stream so it closes and finalizes output to the string.
auto printer = file->CreatePrinter(&output);
std::map<grpc::string, grpc::string> vars;
// Package string is empty or ends with a dot. It is used to fully qualify
// method names.
vars["Package"] = file->package();
if (!file->package().empty()) {
vars["Package"].append(".");
}
if (!params.services_namespace.empty()) {
vars["ns"] = params.services_namespace + "::";
vars["prefix"] = params.services_namespace;
} else {
vars["ns"] = "";
vars["prefix"] = "";
}
for (int i = 0; i < file->service_count(); ++i) {
PrintSourceService(printer.get(), file->service(i).get(), &vars);
printer->Print("\n");
}
}
return output;
}
grpc::string GetSourceEpilogue(grpc_generator::File *file,
const Parameters & /*params*/) {
grpc::string temp;
if (!file->package().empty()) {
std::vector<grpc::string> parts = file->package_parts();
for (auto part = parts.begin(); part != parts.end(); part++) {
temp.append("} // namespace ");
temp.append(*part);
temp.append("\n");
}
temp.append("\n");
}
return temp;
}
// TODO(mmukhi): Make sure we need parameters or not.
grpc::string GetMockPrologue(grpc_generator::File *file,
const Parameters & /*params*/) {
grpc::string output;
{
// Scope the output stream so it closes and finalizes output to the string.
auto printer = file->CreatePrinter(&output);
std::map<grpc::string, grpc::string> vars;
vars["filename"] = file->filename();
vars["filename_base"] = file->filename_without_ext();
vars["message_header_ext"] = kCppGeneratorMessageHeaderExt;
vars["service_header_ext"] = kCppGeneratorServiceHeaderExt;
printer->Print(vars, "// Generated by the gRPC C++ plugin.\n");
printer->Print(vars,
"// If you make any local change, they will be lost.\n");
printer->Print(vars, "// source: $filename$\n\n");
printer->Print(vars, "#include \"$filename_base$$message_header_ext$\"\n");
printer->Print(vars, "#include \"$filename_base$$service_header_ext$\"\n");
printer->Print(vars, file->additional_headers().c_str());
printer->Print(vars, "\n");
}
return output;
}
// TODO(mmukhi): Add client-stream and completion-queue headers.
grpc::string GetMockIncludes(grpc_generator::File *file,
const Parameters &params) {
grpc::string output;
{
// Scope the output stream so it closes and finalizes output to the string.
auto printer = file->CreatePrinter(&output);
std::map<grpc::string, grpc::string> vars;
static const char *headers_strs[] = {
"grpc++/impl/codegen/async_stream.h",
"grpc++/impl/codegen/sync_stream.h", "gmock/gmock.h",
};
std::vector<grpc::string> headers(headers_strs, array_end(headers_strs));
PrintIncludes(printer.get(), headers, params);
if (!file->package().empty()) {
std::vector<grpc::string> parts = file->package_parts();
for (auto part = parts.begin(); part != parts.end(); part++) {
vars["part"] = *part;
printer->Print(vars, "namespace $part$ {\n");
}
}
printer->Print(vars, "\n");
}
return output;
}
void PrintMockClientMethods(grpc_generator::Printer *printer,
const grpc_generator::Method *method,
std::map<grpc::string, grpc::string> *vars) {
(*vars)["Method"] = method->name();
(*vars)["Request"] = method->input_type_name();
(*vars)["Response"] = method->output_type_name();
struct {
grpc::string prefix;
grpc::string method_params; // extra arguments to method
int extra_method_param_count;
} async_prefixes[] = {{"Async", ", void* tag", 1}, {"PrepareAsync", "", 0}};
if (method->NoStreaming()) {
printer->Print(
*vars,
"MOCK_METHOD3($Method$, ::grpc::Status(::grpc::ClientContext* context, "
"const $Request$& request, $Response$* response));\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
printer->Print(
*vars,
"MOCK_METHOD3($AsyncPrefix$$Method$Raw, "
"::grpc::ClientAsyncResponseReaderInterface< $Response$>*"
"(::grpc::ClientContext* context, const $Request$& request, "
"::grpc::CompletionQueue* cq));\n");
}
} else if (ClientOnlyStreaming(method)) {
printer->Print(
*vars,
"MOCK_METHOD2($Method$Raw, "
"::grpc::ClientWriterInterface< $Request$>*"
"(::grpc::ClientContext* context, $Response$* response));\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
(*vars)["MockArgs"] =
std::to_string(3 + async_prefix.extra_method_param_count);
printer->Print(*vars,
"MOCK_METHOD$MockArgs$($AsyncPrefix$$Method$Raw, "
"::grpc::ClientAsyncWriterInterface< $Request$>*"
"(::grpc::ClientContext* context, $Response$* response, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$));\n");
}
} else if (ServerOnlyStreaming(method)) {
printer->Print(
*vars,
"MOCK_METHOD2($Method$Raw, "
"::grpc::ClientReaderInterface< $Response$>*"
"(::grpc::ClientContext* context, const $Request$& request));\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
(*vars)["MockArgs"] =
std::to_string(3 + async_prefix.extra_method_param_count);
printer->Print(
*vars,
"MOCK_METHOD$MockArgs$($AsyncPrefix$$Method$Raw, "
"::grpc::ClientAsyncReaderInterface< $Response$>*"
"(::grpc::ClientContext* context, const $Request$& request, "
"::grpc::CompletionQueue* cq$AsyncMethodParams$));\n");
}
} else if (method->BidiStreaming()) {
printer->Print(
*vars,
"MOCK_METHOD1($Method$Raw, "
"::grpc::ClientReaderWriterInterface< $Request$, $Response$>*"
"(::grpc::ClientContext* context));\n");
for (auto async_prefix : async_prefixes) {
(*vars)["AsyncPrefix"] = async_prefix.prefix;
(*vars)["AsyncMethodParams"] = async_prefix.method_params;
(*vars)["MockArgs"] =
std::to_string(2 + async_prefix.extra_method_param_count);
printer->Print(
*vars,
"MOCK_METHOD$MockArgs$($AsyncPrefix$$Method$Raw, "
"::grpc::ClientAsyncReaderWriterInterface<$Request$, $Response$>*"
"(::grpc::ClientContext* context, ::grpc::CompletionQueue* cq"
"$AsyncMethodParams$));\n");
}
}
}
void PrintMockService(grpc_generator::Printer *printer,
const grpc_generator::Service *service,
std::map<grpc::string, grpc::string> *vars) {
(*vars)["Service"] = service->name();
printer->Print(*vars,
"class Mock$Service$Stub : public $Service$::StubInterface {\n"
" public:\n");
printer->Indent();
for (int i = 0; i < service->method_count(); ++i) {
PrintMockClientMethods(printer, service->method(i).get(), vars);
}
printer->Outdent();
printer->Print("};\n");
}
grpc::string GetMockServices(grpc_generator::File *file,
const Parameters &params) {
grpc::string output;
{
// Scope the output stream so it closes and finalizes output to the string.
auto printer = file->CreatePrinter(&output);
std::map<grpc::string, grpc::string> vars;
// Package string is empty or ends with a dot. It is used to fully qualify
// method names.
vars["Package"] = file->package();
if (!file->package().empty()) {
vars["Package"].append(".");
}
if (!params.services_namespace.empty()) {
vars["services_namespace"] = params.services_namespace;
printer->Print(vars, "\nnamespace $services_namespace$ {\n\n");
}
for (int i = 0; i < file->service_count(); i++) {
PrintMockService(printer.get(), file->service(i).get(), &vars);
printer->Print("\n");
}
if (!params.services_namespace.empty()) {
printer->Print(vars, "} // namespace $services_namespace$\n\n");
}
}
return output;
}
grpc::string GetMockEpilogue(grpc_generator::File *file,
const Parameters & /*params*/) {
grpc::string temp;
if (!file->package().empty()) {
std::vector<grpc::string> parts = file->package_parts();
for (auto part = parts.begin(); part != parts.end(); part++) {
temp.append("} // namespace ");
temp.append(*part);
temp.append("\n");
}
temp.append("\n");
}
return temp;
}
} // namespace grpc_cpp_generator