// Licensed to the Apache Software Foundation (ASF) under one // or more contributor license agreements. See the NOTICE file // distributed with this work for additional information // regarding copyright ownership. The ASF licenses this file // to you 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 <gflags/gflags.h> #include <butil/logging.h> #include <brpc/server.h> #include "echo.pb.h" DEFINE_bool(send_attachment, true, "Carry attachment along with response"); DEFINE_int32(port, 8003, "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'"); DEFINE_int32(logoff_ms, 2000, "Maximum duration of server's LOGOFF state " "(waiting for client to close connection before server stops)"); // Your implementation of example::EchoService class EchoServiceImpl : public example::EchoService { public: EchoServiceImpl() {}; virtual ~EchoServiceImpl() {}; virtual void Echo(google::protobuf::RpcController* cntl_base, const example::EchoRequest* request, example::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); brpc::Controller* cntl = static_cast<brpc::Controller*>(cntl_base); // The purpose of following logs is to help you to understand // how clients interact with servers more intuitively. You should // remove these logs in performance-sensitive servers. LOG(INFO) << "Received request[log_id=" << cntl->log_id() << "] from " << cntl->remote_side() << ": " << request->message() << " (attached=" << cntl->request_attachment() << ")"; // Fill response. response->set_message(request->message()); // You can compress the response by setting Controller, but be aware // that compression may be costly, evaluate before turning on. // cntl->set_response_compress_type(brpc::COMPRESS_TYPE_GZIP); if (FLAGS_send_attachment) { // Set attachment which is wired to network directly instead of // being serialized into protobuf messages. cntl->response_attachment().append("bar"); } } }; int main(int argc, char* argv[]) { // Parse gflags. We recommend you to use gflags as well. GFLAGS_NS::ParseCommandLineFlags(&argc, &argv, true); // Generally you only need one Server. brpc::Server server; // Instance of your service. 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.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; }