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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 <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;
}