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@ -31,26 +31,38 @@ |
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* |
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*/ |
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#include <algorithm> |
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#include <cassert> |
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#include <cctype> |
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#include <cstring> |
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#include <map> |
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#include <ostream> |
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#include <sstream> |
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#include <vector> |
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#include "src/compiler/generator_helpers.h" |
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#include "src/compiler/python_generator.h" |
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#include <google/protobuf/io/printer.h> |
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#include <google/protobuf/io/zero_copy_stream_impl_lite.h> |
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#include <google/protobuf/descriptor.pb.h> |
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#include <google/protobuf/descriptor.h> |
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using grpc_generator::StringReplace; |
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using grpc_generator::StripProto; |
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using google::protobuf::Descriptor; |
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using google::protobuf::FileDescriptor; |
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using google::protobuf::ServiceDescriptor; |
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using google::protobuf::MethodDescriptor; |
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using google::protobuf::ServiceDescriptor; |
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using google::protobuf::io::Printer; |
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using google::protobuf::io::StringOutputStream; |
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using std::initializer_list; |
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using std::make_pair; |
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using std::map; |
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using std::pair; |
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using std::replace; |
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using std::string; |
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using std::strlen; |
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using std::vector; |
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namespace grpc_python_generator { |
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namespace { |
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@ -99,62 +111,81 @@ class IndentScope { |
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// END FORMATTING BOILERPLATE //
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////////////////////////////////
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void PrintService(const ServiceDescriptor* service, |
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bool PrintServicer(const ServiceDescriptor* service, |
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Printer* out) { |
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string doc = "<fill me in later!>"; |
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map<string, string> dict = ListToDict({ |
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"Service", service->name(), |
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"Documentation", doc, |
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}); |
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out->Print(dict, "class $Service$Service(object):\n"); |
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out->Print(dict, "class EarlyAdopter$Service$Servicer(object):\n"); |
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{ |
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IndentScope raii_class_indent(out); |
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out->Print(dict, "\"\"\"$Documentation$\"\"\"\n"); |
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out->Print("def __init__(self):\n"); |
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out->Print("__metaclass__ = abc.ABCMeta\n"); |
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for (int i = 0; i < service->method_count(); ++i) { |
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auto meth = service->method(i); |
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string arg_name = meth->client_streaming() ? |
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"request_iterator" : "request"; |
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out->Print("@abc.abstractmethod\n"); |
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out->Print("def $Method$(self, $ArgName$, context):\n", |
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"Method", meth->name(), "ArgName", arg_name); |
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{ |
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IndentScope raii_method_indent(out); |
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out->Print("pass\n"); |
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out->Print("raise NotImplementedError()\n"); |
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} |
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} |
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} |
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return true; |
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} |
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void PrintServicer(const ServiceDescriptor* service, |
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Printer* out) { |
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bool PrintServer(const ServiceDescriptor* service, Printer* out) { |
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string doc = "<fill me in later!>"; |
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map<string, string> dict = ListToDict({ |
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"Service", service->name(), |
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"Documentation", doc, |
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}); |
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out->Print(dict, "class $Service$Servicer(object):\n"); |
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out->Print(dict, "class EarlyAdopter$Service$Server(object):\n"); |
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{ |
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IndentScope raii_class_indent(out); |
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out->Print(dict, "\"\"\"$Documentation$\"\"\"\n"); |
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for (int i = 0; i < service->method_count(); ++i) { |
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auto meth = service->method(i); |
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out->Print("def $Method$(self, arg):\n", "Method", meth->name()); |
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out->Print("__metaclass__ = abc.ABCMeta\n"); |
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out->Print("@abc.abstractmethod\n"); |
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out->Print("def start(self):\n"); |
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{ |
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IndentScope raii_method_indent(out); |
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out->Print("raise NotImplementedError()\n"); |
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} |
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out->Print("@abc.abstractmethod\n"); |
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out->Print("def stop(self):\n"); |
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{ |
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IndentScope raii_method_indent(out); |
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out->Print("raise NotImplementedError()\n"); |
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} |
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} |
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return true; |
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} |
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void PrintStub(const ServiceDescriptor* service, |
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bool PrintStub(const ServiceDescriptor* service, |
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Printer* out) { |
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string doc = "<fill me in later!>"; |
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map<string, string> dict = ListToDict({ |
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"Service", service->name(), |
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"Documentation", doc, |
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}); |
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out->Print(dict, "class $Service$Stub(object):\n"); |
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out->Print(dict, "class EarlyAdopter$Service$Stub(object):\n"); |
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{ |
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IndentScope raii_class_indent(out); |
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out->Print(dict, "\"\"\"$Documentation$\"\"\"\n"); |
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out->Print("__metaclass__ = abc.ABCMeta\n"); |
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for (int i = 0; i < service->method_count(); ++i) { |
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const MethodDescriptor* meth = service->method(i); |
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auto methdict = ListToDict({"Method", meth->name()}); |
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out->Print(methdict, "def $Method$(self, arg):\n"); |
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string arg_name = meth->client_streaming() ? |
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"request_iterator" : "request"; |
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auto methdict = ListToDict({"Method", meth->name(), "ArgName", arg_name}); |
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out->Print("@abc.abstractmethod\n"); |
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out->Print(methdict, "def $Method$(self, $ArgName$):\n"); |
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{ |
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IndentScope raii_method_indent(out); |
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out->Print("raise NotImplementedError()\n"); |
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@ -162,169 +193,195 @@ void PrintStub(const ServiceDescriptor* service, |
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out->Print(methdict, "$Method$.async = None\n"); |
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} |
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} |
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return true; |
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} |
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void PrintStubImpl(const ServiceDescriptor* service, |
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Printer* out) { |
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map<string, string> dict = ListToDict({ |
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"Service", service->name(), |
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}); |
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out->Print(dict, "class _$Service$Stub($Service$Stub):\n"); |
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{ |
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IndentScope raii_class_indent(out); |
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out->Print("def __init__(self, face_stub, default_timeout):\n"); |
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{ |
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IndentScope raii_method_indent(out); |
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out->Print("self._face_stub = face_stub\n" |
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"self._default_timeout = default_timeout\n" |
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"stub_self = self\n"); |
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// TODO(protobuf team): Export `ModuleName` from protobuf's
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// `src/google/protobuf/compiler/python/python_generator.cc` file.
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string ModuleName(const string& filename) { |
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string basename = StripProto(filename); |
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basename = StringReplace(basename, "-", "_"); |
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basename = StringReplace(basename, "/", "."); |
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return basename + "_pb2"; |
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} |
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bool GetModuleAndMessagePath(const Descriptor* type, |
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pair<string, string>* out) { |
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const Descriptor* path_elem_type = type; |
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vector<const Descriptor*> message_path; |
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do { |
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message_path.push_back(path_elem_type); |
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path_elem_type = path_elem_type->containing_type(); |
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} while (path_elem_type != nullptr); |
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string file_name = type->file()->name(); |
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static const int proto_suffix_length = strlen(".proto"); |
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if (!(file_name.size() > static_cast<size_t>(proto_suffix_length) && |
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file_name.find_last_of(".proto") == file_name.size() - 1)) { |
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return false; |
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} |
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string module = ModuleName(file_name); |
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string message_type; |
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for (auto path_iter = message_path.rbegin(); |
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path_iter != message_path.rend(); ++path_iter) { |
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message_type += (*path_iter)->name() + "."; |
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} |
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// no pop_back prior to C++11
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message_type.resize(message_type.size() - 1); |
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*out = make_pair(module, message_type); |
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return true; |
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} |
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bool PrintServerFactory(const ServiceDescriptor* service, Printer* out) { |
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out->Print("def early_adopter_create_$Service$_server(servicer, port, " |
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"root_certificates, key_chain_pairs):\n", |
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"Service", service->name()); |
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{ |
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IndentScope raii_create_server_indent(out); |
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map<string, pair<string, string>> method_to_module_and_message; |
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out->Print("method_implementations = {\n"); |
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for (int i = 0; i < service->method_count(); ++i) { |
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IndentScope raii_implementations_indent(out); |
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const MethodDescriptor* meth = service->method(i); |
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bool server_streaming = meth->server_streaming(); |
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bool client_streaming = meth->client_streaming(); |
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std::string blocking_call, future_call; |
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if (server_streaming) { |
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if (client_streaming) { |
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blocking_call = "stub_self._face_stub.inline_stream_in_stream_out"; |
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future_call = blocking_call; |
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} else { |
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blocking_call = "stub_self._face_stub.inline_value_in_stream_out"; |
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future_call = blocking_call; |
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} |
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} else { |
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if (client_streaming) { |
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blocking_call = "stub_self._face_stub.blocking_stream_in_value_out"; |
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future_call = "stub_self._face_stub.future_stream_in_value_out"; |
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} else { |
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blocking_call = "stub_self._face_stub.blocking_value_in_value_out"; |
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future_call = "stub_self._face_stub.future_value_in_value_out"; |
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} |
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} |
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// TODO(atash): use the solution described at
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// http://stackoverflow.com/a/2982 to bind 'async' attribute
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// functions to def'd functions instead of using callable attributes.
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auto methdict = ListToDict({ |
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string meth_type = |
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string(meth->client_streaming() ? "stream" : "unary") + |
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string(meth->server_streaming() ? "_stream" : "_unary") + "_inline"; |
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out->Print("\"$Method$\": utilities.$Type$(servicer.$Method$),\n", |
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"Method", meth->name(), |
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"BlockingCall", blocking_call, |
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"FutureCall", future_call |
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}); |
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out->Print(methdict, "class $Method$(object):\n"); |
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{ |
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IndentScope raii_callable_indent(out); |
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out->Print("def __call__(self, arg):\n"); |
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{ |
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IndentScope raii_callable_call_indent(out); |
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out->Print(methdict, |
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"return $BlockingCall$(\"$Method$\", arg, " |
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"stub_self._default_timeout)\n"); |
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} |
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out->Print("def async(self, arg):\n"); |
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{ |
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IndentScope raii_callable_async_indent(out); |
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out->Print(methdict, |
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"return $FutureCall$(\"$Method$\", arg, " |
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"stub_self._default_timeout)\n"); |
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} |
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} |
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out->Print(methdict, "self.$Method$ = $Method$()\n"); |
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} |
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} |
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} |
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"Type", meth_type); |
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// Maintain information on the input type of the service method for later
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// use in constructing the service assembly's activated fore link.
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const Descriptor* input_type = meth->input_type(); |
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pair<string, string> module_and_message; |
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if (!GetModuleAndMessagePath(input_type, &module_and_message)) { |
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return false; |
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} |
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method_to_module_and_message.insert( |
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make_pair(meth->name(), module_and_message)); |
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} |
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out->Print("}\n"); |
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// Ensure that we've imported all of the relevant messages.
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for (auto& meth_vals : method_to_module_and_message) { |
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out->Print("import $Module$\n", |
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"Module", meth_vals.second.first); |
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} |
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out->Print("request_deserializers = {\n"); |
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for (auto& meth_vals : method_to_module_and_message) { |
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IndentScope raii_serializers_indent(out); |
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string full_input_type_path = meth_vals.second.first + "." + |
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meth_vals.second.second; |
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out->Print("\"$Method$\": $Type$.FromString,\n", |
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"Method", meth_vals.first, |
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"Type", full_input_type_path); |
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} |
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out->Print("}\n"); |
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out->Print("response_serializers = {\n"); |
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for (auto& meth_vals : method_to_module_and_message) { |
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IndentScope raii_serializers_indent(out); |
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out->Print("\"$Method$\": lambda x: x.SerializeToString(),\n", |
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"Method", meth_vals.first); |
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} |
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out->Print("}\n"); |
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out->Print("link = fore.activated_fore_link(port, request_deserializers, " |
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"response_serializers, root_certificates, key_chain_pairs)\n"); |
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out->Print("return implementations.assemble_service(" |
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"method_implementations, link)\n"); |
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} |
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return true; |
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} |
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void PrintStubGenerators(const ServiceDescriptor* service, Printer* out) { |
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bool PrintStubFactory(const ServiceDescriptor* service, Printer* out) { |
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map<string, string> dict = ListToDict({ |
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"Service", service->name(), |
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}); |
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// Write out a generator of linked pairs of Server/Stub
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out->Print(dict, "def mock_$Service$(servicer, default_timeout):\n"); |
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out->Print(dict, "def early_adopter_create_$Service$_stub(host, port):\n"); |
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{ |
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IndentScope raii_mock_indent(out); |
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out->Print("value_in_value_out = {}\n" |
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"value_in_stream_out = {}\n" |
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"stream_in_value_out = {}\n" |
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"stream_in_stream_out = {}\n"); |
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IndentScope raii_create_server_indent(out); |
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map<string, pair<string, string>> method_to_module_and_message; |
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out->Print("method_implementations = {\n"); |
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for (int i = 0; i < service->method_count(); ++i) { |
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IndentScope raii_implementations_indent(out); |
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const MethodDescriptor* meth = service->method(i); |
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std::string super_interface, meth_dict; |
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bool server_streaming = meth->server_streaming(); |
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bool client_streaming = meth->client_streaming(); |
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if (server_streaming) { |
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if (client_streaming) { |
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super_interface = "InlineStreamInStreamOutMethod"; |
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meth_dict = "stream_in_stream_out"; |
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} else { |
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super_interface = "InlineValueInStreamOutMethod"; |
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meth_dict = "value_in_stream_out"; |
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} |
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} else { |
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if (client_streaming) { |
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super_interface = "InlineStreamInValueOutMethod"; |
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meth_dict = "stream_in_value_out"; |
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} else { |
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super_interface = "InlineValueInValueOutMethod"; |
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meth_dict = "value_in_value_out"; |
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} |
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} |
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map<string, string> methdict = ListToDict({ |
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string meth_type = |
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string(meth->client_streaming() ? "stream" : "unary") + |
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string(meth->server_streaming() ? "_stream" : "_unary") + "_inline"; |
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// TODO(atash): once the expected input to assemble_dynamic_inline_stub is
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// cleaned up, change this to the expected argument's dictionary values.
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out->Print("\"$Method$\": utilities.$Type$(None),\n", |
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"Method", meth->name(), |
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"SuperInterface", super_interface, |
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"MethodDict", meth_dict |
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}); |
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out->Print( |
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methdict, "class $Method$(_face_interfaces.$SuperInterface$):\n"); |
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{ |
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IndentScope raii_inline_class_indent(out); |
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out->Print("def service(self, request, context):\n"); |
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{ |
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IndentScope raii_inline_class_fn_indent(out); |
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out->Print(methdict, "return servicer.$Method$(request)\n"); |
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} |
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} |
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out->Print(methdict, "$MethodDict$['$Method$'] = $Method$()\n"); |
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} |
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out->Print( |
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"face_linked_pair = _face_testing.server_and_stub(default_timeout," |
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"inline_value_in_value_out_methods=value_in_value_out," |
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"inline_value_in_stream_out_methods=value_in_stream_out," |
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"inline_stream_in_value_out_methods=stream_in_value_out," |
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"inline_stream_in_stream_out_methods=stream_in_stream_out)\n"); |
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out->Print("class LinkedPair(object):\n"); |
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{ |
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IndentScope raii_linked_pair(out); |
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out->Print("def __init__(self, server, stub):\n"); |
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{ |
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IndentScope raii_linked_pair_init(out); |
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out->Print("self.server = server\n" |
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"self.stub = stub\n"); |
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} |
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} |
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out->Print( |
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dict, |
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"stub = _$Service$Stub(face_linked_pair.stub, default_timeout)\n"); |
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out->Print("return LinkedPair(None, stub)\n"); |
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"Type", meth_type); |
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// Maintain information on the input type of the service method for later
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// use in constructing the service assembly's activated fore link.
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const Descriptor* output_type = meth->output_type(); |
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pair<string, string> module_and_message; |
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if (!GetModuleAndMessagePath(output_type, &module_and_message)) { |
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return false; |
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} |
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|
method_to_module_and_message.insert( |
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|
make_pair(meth->name(), module_and_message)); |
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|
} |
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out->Print("}\n"); |
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|
// Ensure that we've imported all of the relevant messages.
|
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|
for (auto& meth_vals : method_to_module_and_message) { |
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|
out->Print("import $Module$\n", |
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|
|
"Module", meth_vals.second.first); |
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|
} |
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|
out->Print("response_deserializers = {\n"); |
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|
for (auto& meth_vals : method_to_module_and_message) { |
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|
|
IndentScope raii_serializers_indent(out); |
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|
|
|
string full_output_type_path = meth_vals.second.first + "." + |
|
|
|
|
meth_vals.second.second; |
|
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|
|
out->Print("\"$Method$\": $Type$.FromString,\n", |
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|
|
"Method", meth_vals.first, |
|
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|
|
"Type", full_output_type_path); |
|
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|
|
} |
|
|
|
|
out->Print("}\n"); |
|
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|
|
out->Print("request_serializers = {\n"); |
|
|
|
|
for (auto& meth_vals : method_to_module_and_message) { |
|
|
|
|
IndentScope raii_serializers_indent(out); |
|
|
|
|
out->Print("\"$Method$\": lambda x: x.SerializeToString(),\n", |
|
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|
|
"Method", meth_vals.first); |
|
|
|
|
} |
|
|
|
|
out->Print("}\n"); |
|
|
|
|
out->Print("link = rear.activated_rear_link(" |
|
|
|
|
"host, port, request_serializers, response_deserializers)\n"); |
|
|
|
|
out->Print("return implementations.assemble_dynamic_inline_stub(" |
|
|
|
|
"method_implementations, link)\n"); |
|
|
|
|
} |
|
|
|
|
return true; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
bool PrintPreamble(const FileDescriptor* file, Printer* out) { |
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|
|
out->Print("import abc\n"); |
|
|
|
|
out->Print("from grpc._adapter import fore\n"); |
|
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|
|
out->Print("from grpc._adapter import rear\n"); |
|
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|
|
out->Print("from grpc.framework.assembly import implementations\n"); |
|
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|
|
out->Print("from grpc.framework.assembly import utilities\n"); |
|
|
|
|
return true; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
} // namespace
|
|
|
|
|
|
|
|
|
|
string GetServices(const FileDescriptor* file) { |
|
|
|
|
pair<bool, string> GetServices(const FileDescriptor* file) { |
|
|
|
|
string output; |
|
|
|
|
{ |
|
|
|
|
// Scope the output stream so it closes and finalizes output to the string.
|
|
|
|
|
StringOutputStream output_stream(&output); |
|
|
|
|
Printer out(&output_stream, '$'); |
|
|
|
|
out.Print("from grpc.framework.face import demonstration as _face_testing\n"); |
|
|
|
|
out.Print("from grpc.framework.face import interfaces as _face_interfaces\n"); |
|
|
|
|
|
|
|
|
|
if (!PrintPreamble(file, &out)) { |
|
|
|
|
return make_pair(false, ""); |
|
|
|
|
} |
|
|
|
|
for (int i = 0; i < file->service_count(); ++i) { |
|
|
|
|
auto service = file->service(i); |
|
|
|
|
PrintService(service, &out); |
|
|
|
|
PrintServicer(service, &out); |
|
|
|
|
PrintStub(service, &out); |
|
|
|
|
PrintStubImpl(service, &out); |
|
|
|
|
PrintStubGenerators(service, &out); |
|
|
|
|
if (!(PrintServicer(service, &out) && |
|
|
|
|
PrintServer(service, &out) && |
|
|
|
|
PrintStub(service, &out) && |
|
|
|
|
PrintServerFactory(service, &out) && |
|
|
|
|
PrintStubFactory(service, &out))) { |
|
|
|
|
return make_pair(false, ""); |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
return output; |
|
|
|
|
return make_pair(true, std::move(output)); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
} // namespace grpc_python_generator
|
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|
|
Craig Tiller
10 years ago