| // 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 <brpc/nshead_service.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'"); |
| DEFINE_int32(max_concurrency, 0, "Limit of request processing in parallel"); |
| |
| // Adapt your own nshead-based protocol to use brpc |
| class MyNsheadProtocol : public brpc::NsheadService { |
| public: |
| void ProcessNsheadRequest(const brpc::Server&, |
| brpc::Controller* cntl, |
| const brpc::NsheadMessage& request, |
| brpc::NsheadMessage* response, |
| brpc::NsheadClosure* 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); |
| |
| if (cntl->Failed()) { |
| // NOTE: You can send back a response containing error information |
| // back to client instead of closing the connection. |
| cntl->CloseConnection("Close connection due to previous error"); |
| return; |
| } |
| *response = request; // Just echo the request to client |
| } |
| }; |
| |
| 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; |
| brpc::ServerOptions options; |
| options.nshead_service = new MyNsheadProtocol; |
| options.idle_timeout_sec = FLAGS_idle_timeout_s; |
| options.max_concurrency = FLAGS_max_concurrency; |
| |
| // Start the server. |
| 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; |
| } |