| /** |
| * Copyright (c) 2016-present, Facebook, 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. |
| */ |
| |
| // This binary provides an easy way to open a zeromq server and feeds data to |
| // clients connect to it. It uses the Caffe2 db as the backend, thus allowing |
| // one to convert any db-compliant storage to a zeromq service. |
| |
| #include "caffe2/core/db.h" |
| #include "caffe2/core/init.h" |
| #include "caffe2/core/logging.h" |
| #include "caffe2/utils/zmq_helper.h" |
| |
| C10_DEFINE_string(server, "tcp://*:5555", "The server address."); |
| C10_DEFINE_string(input_db, "", "The input db."); |
| C10_DEFINE_string(input_db_type, "", "The input db type."); |
| |
| |
| int main(int argc, char** argv) { |
| caffe2::GlobalInit(&argc, &argv); |
| |
| LOG(INFO) << "Opening DB..."; |
| auto in_db = caffe2::db::CreateDB( |
| FLAGS_input_db_type, FLAGS_input_db, caffe2::db::READ); |
| CAFFE_ENFORCE( |
| in_db, |
| "Cannot load input db " + FLAGS_input_db + " of expected type " + |
| FLAGS_input_db_type); |
| auto cursor = in_db->NewCursor(); |
| LOG(INFO) << "DB opened."; |
| |
| LOG(INFO) << "Starting ZeroMQ server..."; |
| |
| // Socket to talk to clients |
| caffe2::ZmqSocket sender(ZMQ_PUSH); |
| sender.Bind(FLAGS_server); |
| LOG(INFO) << "Server created at " << FLAGS_server; |
| |
| while (1) { |
| VLOG(1) << "Sending " << cursor->key(); |
| sender.SendTillSuccess(cursor->key(), ZMQ_SNDMORE); |
| sender.SendTillSuccess(cursor->value(), 0); |
| cursor->Next(); |
| if (!cursor->Valid()) { |
| cursor->SeekToFirst(); |
| } |
| } |
| // We do not do an elegant quit since this binary is going to be terminated by |
| // control+C. |
| return 0; |
| } |