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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 "mongo/s/sharding_task_executor_pool_controller.h"
#include "mongo/stdx/unordered_map.h"
#include "mongo/util/duration.h"
#include "mongo/util/histogram.h"
#include "mongo/util/net/hostandport.h"
namespace mongo {
namespace executor {
/**
* Histogram type to be used for tracking how long it took the connection pool to return a
* requested connection.
*/
class ConnectionWaitTimeHistogram
: public Histogram<Milliseconds, std::less<Milliseconds>, int64_t> {
public:
ConnectionWaitTimeHistogram();
ConnectionWaitTimeHistogram& operator+=(const ConnectionWaitTimeHistogram& other);
};
/**
* Holds connection information for a specific pool or remote host. These objects are maintained by
* a parent ConnectionPoolStats object and should not need to be created directly.
*/
struct ConnectionStatsPer {
ConnectionStatsPer(size_t nInUse,
size_t nAvailable,
size_t nLeased,
size_t nCreated,
size_t nRefreshing,
size_t nRefreshed,
size_t nWasNeverUsed,
size_t nWasUsedOnce,
Milliseconds nConnUsageTime);
ConnectionStatsPer();
ConnectionStatsPer& operator+=(const ConnectionStatsPer& other);
size_t inUse = 0u;
size_t available = 0u;
size_t leased = 0u;
size_t created = 0u;
size_t refreshing = 0u;
size_t refreshed = 0u;
size_t wasNeverUsed = 0u;
size_t wasUsedOnce = 0u;
Milliseconds connUsageTime{0};
ConnectionWaitTimeHistogram acquisitionWaitTimes{};
};
/**
* Aggregates connection information for the connPoolStats command. Connection pools should
* use the updateStatsForHost() method to append their host-specific information to this object.
* Total connection counts will then be updated accordingly.
*/
struct ConnectionPoolStats {
void updateStatsForHost(std::string pool, HostAndPort host, const ConnectionStatsPer& newStats);
// FTDC : Full Time Diagnostic Data Collection
void appendToBSON(mongo::BSONObjBuilder& result, bool forFTDC = false);
size_t totalInUse = 0u;
size_t totalAvailable = 0u;
size_t totalLeased = 0u;
size_t totalCreated = 0u;
size_t totalRefreshing = 0u;
size_t totalRefreshed = 0u;
size_t totalWasNeverUsed = 0u;
size_t totalWasUsedOnce = 0u;
Milliseconds totalConnUsageTime{0};
boost::optional<ShardingTaskExecutorPoolController::MatchingStrategy> strategy;
ConnectionWaitTimeHistogram acquisitionWaitTimes{};
using StatsByHost = std::map<HostAndPort, ConnectionStatsPer>;
struct PoolStats final : public ConnectionStatsPer {
StatsByHost statsByHost;
};
using StatsByPool = std::map<std::string, PoolStats>;
StatsByHost statsByHost;
StatsByPool statsByPool;
};
} // namespace executor
} // namespace mongo
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