pytorch

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/**
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 * Copyright (c) 2016-present, Facebook, Inc.
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *     http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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// This binary provides an easy way to open a zeromq server and feeds data to
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// clients connect to it. It uses the Caffe2 db as the backend, thus allowing
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// one to convert any db-compliant storage to a zeromq service.
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#include "caffe2/core/db.h"
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#include "caffe2/core/init.h"
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#include "caffe2/core/logging.h"
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#include "caffe2/utils/zmq_helper.h"
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C10_DEFINE_string(server, "tcp://*:5555", "The server address.");
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C10_DEFINE_string(input_db, "", "The input db.");
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C10_DEFINE_string(input_db_type, "", "The input db type.");
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int main(int argc, char** argv) {
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  caffe2::GlobalInit(&argc, &argv);
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  LOG(INFO) << "Opening DB...";
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  auto in_db = caffe2::db::CreateDB(
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      FLAGS_input_db_type, FLAGS_input_db, caffe2::db::READ);
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  CAFFE_ENFORCE(
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      in_db,
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      "Cannot load input db " + FLAGS_input_db + " of expected type " +
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          FLAGS_input_db_type);
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  auto cursor = in_db->NewCursor();
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  LOG(INFO) << "DB opened.";
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  LOG(INFO) << "Starting ZeroMQ server...";
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  //  Socket to talk to clients
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  caffe2::ZmqSocket sender(ZMQ_PUSH);
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  sender.Bind(FLAGS_server);
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  LOG(INFO) << "Server created at " << FLAGS_server;
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  while (1) {
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    VLOG(1) << "Sending " << cursor->key();
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    sender.SendTillSuccess(cursor->key(), ZMQ_SNDMORE);
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    sender.SendTillSuccess(cursor->value(), 0);
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    cursor->Next();
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    if (!cursor->Valid()) {
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      cursor->SeekToFirst();
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    }
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  }
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  // We do not do an elegant quit since this binary is going to be terminated by
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  // control+C.
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  return 0;
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}
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