// Copyright (c) 2014 Baidu, Inc. // // 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. // A server to receive EchoRequest and send back EchoResponse. #include <google/protobuf/descriptor.h> #include <gflags/gflags.h> #include <butil/logging.h> #include <brpc/server.h> #include <brpc/nshead_pb_service_adaptor.h> #include "echo.pb.h" DEFINE_int32(port, 8010, "TCP Port of this server"); DEFINE_int32(idle_timeout_s, -1, "Connection will be closed if there is no " "read/write operations during the last `idle_timeout_s'"); // Your implementation of example::EchoService namespace example { class EchoServiceImpl : public EchoService { public: EchoServiceImpl() {}; virtual ~EchoServiceImpl() {}; virtual void Echo(google::protobuf::RpcController*, const EchoRequest* request, EchoResponse* response, google::protobuf::Closure* done) { // This object helps you to call done->Run() in RAII style. If you need // to process the request asynchronously, pass done_guard.release(). brpc::ClosureGuard done_guard(done); // Echo response. response->set_message(request->message()); } }; } // namespace example // Adapt your own nshead-based protocol to use pbrpc interface class MyNsheadProtocol : public brpc::NsheadPbServiceAdaptor { public: void ParseNsheadMeta( const brpc::Server&, const brpc::NsheadMessage&, brpc::Controller*, brpc::NsheadMeta* out_meta) const { // Always use EchoService::Echo const google::protobuf::ServiceDescriptor* svc = example::EchoService::descriptor(); out_meta->set_full_method_name(svc->method(0)->full_name()); } void ParseRequestFromIOBuf(const brpc::NsheadMeta&, const brpc::NsheadMessage& raw_req, brpc::Controller* cntl, google::protobuf::Message* pb_req) const { // `req' MUST be EchoRequest here since we have only one RPCMethod example::EchoRequest* echo_req = dynamic_cast<example::EchoRequest*>(pb_req); if (!echo_req) { cntl->SetFailed(brpc::EREQUEST, "Fail to parse request"); return; } echo_req->set_message(raw_req.body.to_string()); } void SerializeResponseToIOBuf( const brpc::NsheadMeta&, brpc::Controller* cntl, const google::protobuf::Message* pb_res, brpc::NsheadMessage* raw_res) const { if (cntl->Failed()) { // Can't send failure feedback in this protocol cntl->CloseConnection("Close connection due to previous error"); return; } // `res' MUST be EchoResponse here since we have only one RPCMethod const example::EchoResponse* echo_res = dynamic_cast<const example::EchoResponse*>(pb_res); if (!echo_res) { cntl->CloseConnection("Close connection due to bad response"); return; } raw_res->body.append(echo_res->message()); } }; int main(int argc, char* argv[]) { // Parse gflags. We recommend you to use gflags as well. GFLAGS_NS::ParseCommandLineFlags(&argc, &argv, true); brpc::Server server; example::EchoServiceImpl echo_service_impl; // Add the service into server. Notice the second parameter, because the // service is put on stack, we don't want server to delete it, otherwise // use brpc::SERVER_OWNS_SERVICE. if (server.AddService(&echo_service_impl, brpc::SERVER_DOESNT_OWN_SERVICE) != 0) { LOG(ERROR) << "Fail to add service"; return -1; } // Start the server. brpc::ServerOptions options; options.nshead_service = new MyNsheadProtocol; // the adaptor options.idle_timeout_sec = FLAGS_idle_timeout_s; if (server.Start(FLAGS_port, &options) != 0) { LOG(ERROR) << "Fail to start EchoServer"; return -1; } // Wait until Ctrl-C is pressed, then Stop() and Join() the server. server.RunUntilAskedToQuit(); return 0; }