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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 <boost/optional.hpp>
#include "mongo/db/service_context.h"
#include "mongo/db/traffic_recorder_gen.h"
#include "mongo/platform/atomic_word.h"
#include "mongo/platform/mutex.h"
#include "mongo/rpc/message.h"
#include "mongo/transport/session.h"
namespace mongo {
/**
* A service context level global which captures packet capture through the transport layer if it is
* enabled. The service is intended to be turned on and off via startRecordingTrafficTraffic and
* stopRecordingTrafficTraffic.
*
* The recording can have one recording running at a time and the intention is that observe() blocks
* callers for the least amount of time possible.
*/
class TrafficRecorder {
public:
static TrafficRecorder& get(ServiceContext* svc);
TrafficRecorder();
~TrafficRecorder();
// Start and stop block until the associate operation has succeeded or failed
//
// On failure these methods throw
void start(const StartRecordingTraffic& options);
void stop();
void observe(const transport::SessionHandle& ts, Date_t now, const Message& message);
private:
class TrafficRecorderSSS;
class Recording;
std::shared_ptr<Recording> _getCurrentRecording() const;
AtomicWord<bool> _shouldRecord;
// The mutex only protects the last recording shared_ptr
mutable Mutex _mutex = MONGO_MAKE_LATCH("TrafficRecorder::_mutex");
std::shared_ptr<Recording> _recording;
};
} // namespace mongo
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