| // 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 <json2pb/pb_to_json.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'"); |
| |
| // 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); |
| |
| // optional: set a callback function which is called after response is sent |
| // and before cntl/req/res is destructed. |
| cntl->set_after_rpc_resp_fn(std::bind(&EchoServiceImpl::CallAfterRpc, |
| std::placeholders::_1, std::placeholders::_2, std::placeholders::_3)); |
| |
| // 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"); |
| } |
| } |
| |
| // optional |
| static void CallAfterRpc(brpc::Controller* cntl, |
| const google::protobuf::Message* req, |
| const google::protobuf::Message* res) { |
| // at this time res is already sent to client, but cntl/req/res is not destructed |
| std::string req_str; |
| std::string res_str; |
| json2pb::ProtoMessageToJson(*req, &req_str, NULL); |
| json2pb::ProtoMessageToJson(*res, &res_str, NULL); |
| LOG(INFO) << "req:" << req_str |
| << " res:" << res_str; |
| } |
| }; |
| |
| 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; |
| } |