From 4547940d0671b528f2ace782466af94150cb7902 Mon Sep 17 00:00:00 2001 From: Nathaniel Manista Date: Mon, 13 Jun 2016 20:14:18 +0000 Subject: Python GA code generation --- src/compiler/python_generator.cc | 148 ++++++++++++++++++++++++++++++++++++++- src/compiler/python_generator.h | 1 + src/compiler/python_plugin.cc | 1 + 3 files changed, 148 insertions(+), 2 deletions(-) (limited to 'src/compiler') diff --git a/src/compiler/python_generator.cc b/src/compiler/python_generator.cc index cd5ddd8832..15cda474cc 100644 --- a/src/compiler/python_generator.cc +++ b/src/compiler/python_generator.cc @@ -342,7 +342,7 @@ bool PrintBetaServerFactory(const grpc::string& package_qualified_service_name, out->Print("}\n"); out->Print("method_implementations = {\n"); for (auto name_and_implementation_constructor = - method_implementation_constructors.begin(); + method_implementation_constructors.begin(); name_and_implementation_constructor != method_implementation_constructors.end(); name_and_implementation_constructor++) { @@ -457,8 +457,149 @@ bool PrintBetaStubFactory(const grpc::string& package_qualified_service_name, return true; } +bool PrintStub(const grpc::string& package_qualified_service_name, + const ServiceDescriptor* service, Printer* out) { + out->Print("\n\n"); + out->Print("class $Service$Stub(object):\n", "Service", service->name()); + { + IndentScope raii_class_indent(out); + PrintAllComments(service, out); + out->Print("\n"); + out->Print("def __init__(self, channel):\n"); + { + IndentScope raii_init_indent(out); + out->Print("\"\"\"Constructor.\n"); + out->Print("\n"); + out->Print("Args:\n"); + { + IndentScope raii_args_indent(out); + out->Print("channel: A grpc.Channel.\n"); + } + out->Print("\"\"\"\n"); + for (int i = 0; i < service->method_count(); ++i) { + auto method = service->method(i); + auto multi_callable_constructor = + grpc::string(method->client_streaming() ? "stream" : "unary") + + "_" + + grpc::string(method->server_streaming() ? "stream" : "unary"); + grpc::string request_module_and_class; + if (!GetModuleAndMessagePath(method->input_type(), service, + &request_module_and_class)) { + return false; + } + grpc::string response_module_and_class; + if (!GetModuleAndMessagePath(method->output_type(), service, + &response_module_and_class)) { + return false; + } + out->Print("self.$Method$ = channel.$MultiCallableConstructor$(\n", + "Method", method->name(), + "MultiCallableConstructor", multi_callable_constructor); + { + IndentScope raii_first_attribute_indent(out); + IndentScope raii_second_attribute_indent(out); + out->Print( + "'/$PackageQualifiedService$/$Method$',\n", + "PackageQualifiedService", package_qualified_service_name, + "Method", method->name()); + out->Print( + "request_serializer=$RequestModuleAndClass$.SerializeToString,\n", + "RequestModuleAndClass", request_module_and_class); + out->Print( + "response_deserializer=$ResponseModuleAndClass$.FromString,\n", + "ResponseModuleAndClass", response_module_and_class); + out->Print(")\n"); + } + } + } + } + return true; +} + +bool PrintServicer(const ServiceDescriptor* service, Printer* out) { + out->Print("\n\n"); + out->Print("class $Service$Servicer(object):\n", "Service", service->name()); + { + IndentScope raii_class_indent(out); + PrintAllComments(service, out); + for (int i = 0; i < service->method_count(); ++i) { + auto method = service->method(i); + grpc::string arg_name = method->client_streaming() ? + "request_iterator" : "request"; + out->Print("\n"); + out->Print("def $Method$(self, $ArgName$, context):\n", + "Method", method->name(), "ArgName", arg_name); + { + IndentScope raii_method_indent(out); + PrintAllComments(method, out); + out->Print("context.set_code(grpc.StatusCode.UNIMPLEMENTED)\n"); + out->Print("context.set_details('Method not implemented!')\n"); + out->Print("raise NotImplementedError('Method not implemented!')\n"); + } + } + } + return true; +} + +bool PrintAddServicerToServer(const grpc::string& package_qualified_service_name, + const ServiceDescriptor* service, Printer* out) { + out->Print("\n\n"); + out->Print("def add_$Service$Servicer_to_server(servicer, server):\n", + "Service", service->name()); + { + IndentScope raii_class_indent(out); + out->Print("rpc_method_handlers = {\n"); + { + IndentScope raii_dict_first_indent(out); + IndentScope raii_dict_second_indent(out); + for (int i = 0; i < service->method_count(); ++i) { + auto method = service->method(i); + auto method_handler_constructor = + grpc::string(method->client_streaming() ? "stream" : "unary") + + "_" + + grpc::string(method->server_streaming() ? "stream" : "unary") + + "_rpc_method_handler"; + grpc::string request_module_and_class; + if (!GetModuleAndMessagePath(method->input_type(), service, + &request_module_and_class)) { + return false; + } + grpc::string response_module_and_class; + if (!GetModuleAndMessagePath(method->output_type(), service, + &response_module_and_class)) { + return false; + } + out->Print("'$Method$': grpc.$MethodHandlerConstructor$(\n", + "Method", method->name(), + "MethodHandlerConstructor", method_handler_constructor); + { + IndentScope raii_call_first_indent(out); + IndentScope raii_call_second_indent(out); + out->Print("servicer.$Method$,\n", "Method", method->name()); + out->Print("request_deserializer=$RequestModuleAndClass$.FromString,\n", + "RequestModuleAndClass", request_module_and_class); + out->Print("response_serializer=$ResponseModuleAndClass$.SerializeToString,\n", + "ResponseModuleAndClass", response_module_and_class); + } + out->Print("),\n"); + } + } + out->Print("}\n"); + out->Print("generic_handler = grpc.method_handlers_generic_handler(\n"); + { + IndentScope raii_call_first_indent(out); + IndentScope raii_call_second_indent(out); + out->Print("'$PackageQualifiedServiceName$', rpc_method_handlers)\n", + "PackageQualifiedServiceName", package_qualified_service_name); + } + out->Print("server.add_generic_rpc_handlers((generic_handler,))\n"); + } + return true; +} + bool PrintPreamble(const FileDescriptor* file, const GeneratorConfiguration& config, Printer* out) { + out->Print("import $Package$\n", "Package", config.grpc_package_root); out->Print("from $Package$ import implementations as beta_implementations\n", "Package", config.beta_package_root); out->Print("from $Package$ import interfaces as beta_interfaces\n", @@ -487,7 +628,10 @@ pair GetServices(const FileDescriptor* file, for (int i = 0; i < file->service_count(); ++i) { auto service = file->service(i); auto package_qualified_service_name = package + service->name(); - if (!(PrintBetaServicer(service, &out) && + if (!(PrintStub(package_qualified_service_name, service, &out) && + PrintServicer(service, &out) && + PrintAddServicerToServer(package_qualified_service_name, service, &out) && + PrintBetaServicer(service, &out) && PrintBetaStub(service, &out) && PrintBetaServerFactory(package_qualified_service_name, service, &out) && PrintBetaStubFactory(package_qualified_service_name, service, &out))) { diff --git a/src/compiler/python_generator.h b/src/compiler/python_generator.h index e56b6790ef..fc51b48dae 100644 --- a/src/compiler/python_generator.h +++ b/src/compiler/python_generator.h @@ -43,6 +43,7 @@ namespace grpc_python_generator { // Data pertaining to configuration of the generator with respect to anything // that may be used internally at Google. struct GeneratorConfiguration { + grpc::string grpc_package_root; grpc::string beta_package_root; }; diff --git a/src/compiler/python_plugin.cc b/src/compiler/python_plugin.cc index 92a07b2f80..fc76ee5ec6 100644 --- a/src/compiler/python_plugin.cc +++ b/src/compiler/python_plugin.cc @@ -38,6 +38,7 @@ int main(int argc, char* argv[]) { grpc_python_generator::GeneratorConfiguration config; + config.grpc_package_root = "grpc"; config.beta_package_root = "grpc.beta"; grpc_python_generator::PythonGrpcGenerator generator(config); return grpc::protobuf::compiler::PluginMain(argc, argv, &generator); -- cgit v1.2.3