// 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 <gflags/gflags.h> #include <butil/logging.h> #include <brpc/server.h> #include "echo.pb.h" #include <brpc/stream.h> DEFINE_bool(send_attachment, true, "Carry attachment along with response"); DEFINE_int32(port, 8001, "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)"); class StreamReceiver : public brpc::StreamInputHandler { public: virtual int on_received_messages(brpc::StreamId id, butil::IOBuf *const messages[], size_t size) { LOG(INFO) << "Received from Stream=" << id << ": " << noflush; for (size_t i = 0; i < size; ++i) { LOG(INFO) << "msg[" << i << "]=" << *messages[i] << noflush; } LOG(INFO); return 0; } virtual void on_idle_timeout(brpc::StreamId id) { LOG(INFO) << "Stream=" << id << " has no data transmission for a while"; } virtual void on_closed(brpc::StreamId id) { LOG(INFO) << "Stream=" << id << " is closed"; } }; // Your implementation of example::EchoService class StreamingEchoService : public example::EchoService { public: StreamingEchoService() : _sd(brpc::INVALID_STREAM_ID) {}; virtual ~StreamingEchoService() { brpc::StreamClose(_sd); }; virtual void Echo(google::protobuf::RpcController* controller, 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*>(controller); brpc::StreamOptions stream_options; stream_options.handler = &_receiver; if (brpc::StreamAccept(&_sd, *cntl, &stream_options) != 0) { cntl->SetFailed("Fail to accept stream"); return; } response->set_message("Accepted stream"); } private: StreamReceiver _receiver; brpc::StreamId _sd; }; 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. StreamingEchoService 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; }