// Copyright (c) 2016 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 <brpc/thrift_message.h> #include <brpc/channel.h> #include <brpc/thrift_service.h> #include "gen-cpp/echo_types.h" DEFINE_int32(port, 8019, "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 thrift-based protocol to use brpc class EchoServiceImpl : public brpc::ThriftService { public: EchoServiceImpl() { // Initialize the channel, NULL means using default options. brpc::ChannelOptions options; options.protocol = brpc::PROTOCOL_THRIFT; if (_channel.Init("0.0.0.0", FLAGS_port , &options) != 0) { LOG(ERROR) << "Fail to initialize channel"; } } void ProcessThriftFramedRequest(brpc::Controller* cntl, brpc::ThriftFramedMessage* req, brpc::ThriftFramedMessage* res, google::protobuf::Closure* done) override { // Dispatch calls to different methods if (cntl->thrift_method_name() == "Echo") { // Proxy request/response to RealEcho, note that as a proxy we // don't need to Cast the messages to native types. brpc::Controller cntl; brpc::ThriftStub stub(&_channel); // TODO: Following Cast<> drops data field from ProxyRequest which // does not recognize the field, should be debugged further. // LOG(INFO) << "req=" << *req->Cast<example::ProxyRequest>(); stub.CallMethod("RealEcho", &cntl, req, res, NULL); done->Run(); } else if (cntl->thrift_method_name() == "RealEcho") { return RealEcho(cntl, req->Cast<example::EchoRequest>(), res->Cast<example::EchoResponse>(), done); } else { cntl->SetFailed(brpc::ENOMETHOD, "Fail to find method=%s", cntl->thrift_method_name().c_str()); done->Run(); } } void RealEcho(brpc::Controller* cntl, const example::EchoRequest* req, example::EchoResponse* res, 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); res->data = req->data + " (RealEcho)"; } private: brpc::Channel _channel; }; int main(int argc, char* argv[]) { // Parse gflags. We recommend you to use gflags as well. google::ParseCommandLineFlags(&argc, &argv, true); brpc::Server server; brpc::ServerOptions options; options.thrift_service = new EchoServiceImpl; 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; }