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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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 <functional>
#include "mongo/db/service_context.h"
#include "mongo/executor/egress_tag_closer.h"
#include "mongo/platform/mutex.h"
#include "mongo/stdx/unordered_set.h"
#include "mongo/transport/session.h"
#include "mongo/util/net/hostandport.h"
namespace mongo {
namespace executor {
/**
* Manager for some number of EgressTagClosers, controlling dispatching to the managed resources.
*
* The idea is that you own some semi-global EgressTagCloserManager which owns a bunch of TagClosers
* (which register themselves with it) and then interact exclusively with the manager.
*/
class EgressTagCloserManager {
public:
EgressTagCloserManager() = default;
static EgressTagCloserManager& get(ServiceContext* svc);
void add(EgressTagCloser* etc);
void remove(EgressTagCloser* etc);
void dropConnections(transport::Session::TagMask tags);
void dropConnections(const HostAndPort& hostAndPort);
void mutateTags(
const HostAndPort& hostAndPort,
const std::function<transport::Session::TagMask(transport::Session::TagMask)>& mutateFunc);
private:
Mutex _mutex = MONGO_MAKE_LATCH("EgressTagCloserManager::_mutex");
stdx::unordered_set<EgressTagCloser*> _egressTagClosers;
};
} // namespace executor
} // namespace mongo
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