// 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.

#pragma once

#include <boost/uuid/uuid.hpp>

#include <boost/uuid/uuid_generators.hpp>

#include <boost/uuid/uuid_io.hpp>

#include <mutex>

namespace doris {

class UUIDGenerator {

public:

    boost::uuids::uuid next_uuid() {

        std::lock_guard<std::mutex> lock(_uuid_gen_lock);

        return _boost_uuid_generator();

    }

    static UUIDGenerator* instance() {

        static UUIDGenerator generator;

        return &generator;

    }

private:

    boost::uuids::basic_random_generator<boost::mt19937> _boost_uuid_generator;

    std::mutex _uuid_gen_lock;

};

} // namespace doris