/**
 * Copyright (C) 2018 MongoDB Inc.
 *
 * This program is free software: you can redistribute it and/or  modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * As a special exception, the copyright holders give permission to link the
 * code of portions of this program with the OpenSSL library under certain
 * conditions as described in each individual source file and distribute
 * linked combinations including the program with the OpenSSL library. You
 * must comply with the GNU Affero General Public License in all respects
 * for all of the code used other than as permitted herein. If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so. If you do not
 * wish to do so, delete this exception statement from your version. If you
 * delete this exception statement from all source files in the program,
 * then also delete it in the license file.
 */

#pragma once

#include "mongo/stdx/functional.h"
#include "mongo/transport/session.h"
#include "mongo/util/net/hostandport.h"

namespace mongo {
namespace executor {

/**
 * Thin interface for types that can mutateTags called on them and then later be dropped or not
 * based on those tags.  Largely to support upgrade/downgrade scenarios with hosts we should now no
 * longer talk to.
 */
class EgressTagCloser {
public:
    virtual ~EgressTagCloser() {}

    virtual void dropConnections(transport::Session::TagMask tags) = 0;

    virtual void mutateTags(const HostAndPort& hostAndPort,
                            const stdx::function<transport::Session::TagMask(
                                transport::Session::TagMask)>& mutateFunc) = 0;

protected:
    EgressTagCloser() {}
};

}  // namespace executor
}  // namespace mongo