127 lines
4.8 KiB
C++
127 lines
4.8 KiB
C++
// 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 <google/protobuf/descriptor.h>
|
|
#include <gflags/gflags.h>
|
|
#include <butil/logging.h>
|
|
#include <brpc/server.h>
|
|
#include <brpc/nshead_pb_service_adaptor.h>
|
|
#include "echo.pb.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'");
|
|
|
|
// Your implementation of example::EchoService
|
|
namespace example {
|
|
class EchoServiceImpl : public EchoService {
|
|
public:
|
|
EchoServiceImpl() {}
|
|
virtual ~EchoServiceImpl() {}
|
|
virtual void Echo(google::protobuf::RpcController*,
|
|
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);
|
|
|
|
// Echo response.
|
|
response->set_message(request->message());
|
|
}
|
|
};
|
|
} // namespace example
|
|
|
|
// Adapt your own nshead-based protocol to use pbrpc interface
|
|
class MyNsheadProtocol : public brpc::NsheadPbServiceAdaptor {
|
|
public:
|
|
void ParseNsheadMeta(
|
|
const brpc::Server&, const brpc::NsheadMessage&,
|
|
brpc::Controller*,
|
|
brpc::NsheadMeta* out_meta) const {
|
|
// Always use EchoService::Echo
|
|
const google::protobuf::ServiceDescriptor* svc =
|
|
example::EchoService::descriptor();
|
|
out_meta->set_full_method_name(svc->method(0)->full_name());
|
|
}
|
|
|
|
void ParseRequestFromIOBuf(const brpc::NsheadMeta&,
|
|
const brpc::NsheadMessage& raw_req,
|
|
brpc::Controller* cntl,
|
|
google::protobuf::Message* pb_req) const {
|
|
// `req' MUST be EchoRequest here since we have only one RPCMethod
|
|
example::EchoRequest* echo_req =
|
|
dynamic_cast<example::EchoRequest*>(pb_req);
|
|
if (!echo_req) {
|
|
cntl->SetFailed(brpc::EREQUEST, "Fail to parse request");
|
|
return;
|
|
}
|
|
echo_req->set_message(raw_req.body.to_string());
|
|
}
|
|
|
|
void SerializeResponseToIOBuf(
|
|
const brpc::NsheadMeta&, brpc::Controller* cntl,
|
|
const google::protobuf::Message* pb_res,
|
|
brpc::NsheadMessage* raw_res) const {
|
|
if (cntl->Failed()) {
|
|
// Can't send failure feedback in this protocol
|
|
cntl->CloseConnection("Close connection due to previous error");
|
|
return;
|
|
}
|
|
// `res' MUST be EchoResponse here since we have only one RPCMethod
|
|
const example::EchoResponse* echo_res =
|
|
dynamic_cast<const example::EchoResponse*>(pb_res);
|
|
if (!echo_res) {
|
|
cntl->CloseConnection("Close connection due to bad response");
|
|
return;
|
|
}
|
|
raw_res->body.append(echo_res->message());
|
|
}
|
|
};
|
|
|
|
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;
|
|
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.nshead_service = new MyNsheadProtocol; // the adaptor
|
|
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;
|
|
}
|