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- // 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"
- DEFINE_bool(echo_attachment, true, "Echo attachment as well");
- DEFINE_int32(port, 8000, "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
- // Notice that implementing brpc::Describable grants the ability to put
- // additional information in /status.
- namespace example {
- class EchoServiceImpl : public EchoService {
- public:
- EchoServiceImpl() {};
- virtual ~EchoServiceImpl() {};
- virtual void Echo(google::protobuf::RpcController* cntl_base,
- 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);
- 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.
- // You should also noticed that these logs are different from what
- // we wrote in other projects: they use << instead of printf-style
- // functions. But don't worry, these logs are fully compatible with
- // comlog. You can mix them with comlog or ullog functions freely.
- // The noflush prevents the log from being flushed immediately.
- LOG(INFO) << "Received request[log_id=" << cntl->log_id()
- << "] from " << cntl->remote_side()
- << " to " << cntl->local_side() << noflush;
- LOG(INFO) << ": " << request->message() << noflush;
- if (!cntl->request_attachment().empty()) {
- LOG(INFO) << " (attached=" << cntl->request_attachment() << ")" << noflush;
- }
- LOG(INFO);
- // 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_echo_attachment) {
- // Set attachment which is wired to network directly instead of
- // being serialized into protobuf messages.
- cntl->response_attachment().append(cntl->request_attachment());
- }
- }
- };
- } // namespace example
- int main(int argc, char* argv[]) {
- // Parse gflags. We recommend you to use gflags as well.
- google::ParseCommandLineFlags(&argc, &argv, true);
- // Generally you only need one Server.
- brpc::Server server;
- // Instance of your service.
- 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.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;
- }
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