pool.hpp

// Copyright 2015 MongoDB 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.

#pragma once

#include <functional>
#include <memory>

#include <bsoncxx/stdx/optional.hpp>
#include <mongocxx/options/ssl.hpp>
#include <mongocxx/stdx.hpp>
#include <mongocxx/uri.hpp>

#include <mongocxx/config/prelude.hpp>

namespace mongocxx {
MONGOCXX_INLINE_NAMESPACE_BEGIN

class client;

class MONGOCXX_API pool {
   public:
    pool(const uri& mongodb_uri = mongocxx::uri(),
         stdx::optional<options::ssl> ssl_options = stdx::nullopt);

    ~pool();

    using entry = std::unique_ptr<client, std::function<void(client*)>>;

    entry acquire();

    stdx::optional<entry> try_acquire();

   private:
    MONGOCXX_PRIVATE void _release(client* client);

    class MONGOCXX_PRIVATE impl;
    const std::unique_ptr<impl> _impl;
};

MONGOCXX_INLINE_NAMESPACE_END
}  // namespace mongocxx

#include <mongocxx/config/postlude.hpp>