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/**
* Copyright (C) 2023-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.
*/
#include <algorithm>
#include "mongo/executor/connection_pool_controllers.h"
namespace mongo::executor {
namespace {
template <typename Map, typename Key>
auto& getOrInvariant(Map&& map, const Key& key) {
auto it = map.find(key);
invariant(it != map.end(), "Unable to find key in map");
return it->second;
}
} // namespace
void DynamicLimitController::init(executor::ConnectionPool* parent) {
ControllerInterface::init(parent);
}
void DynamicLimitController::addHost(PoolId id, const HostAndPort& host) {
stdx::lock_guard lk(_mutex);
auto ret = _poolData.insert({id, {host}});
using namespace fmt::literals;
invariant(
ret.second,
"ConnectionPool controller {} received a request to track host {} that was already being tracked."_format(
_name, host));
}
DynamicLimitController::HostGroupState DynamicLimitController::updateHost(PoolId id,
const HostState& stats) {
stdx::lock_guard lk(_mutex);
auto& data = getOrInvariant(_poolData, id);
data.target =
std::clamp(stats.requests + stats.active + stats.leased, _minLoader(), _maxLoader());
return {{data.host}, stats.health.isExpired};
}
void DynamicLimitController::removeHost(PoolId id) {
stdx::lock_guard lk(_mutex);
invariant(_poolData.erase(id));
}
ConnectionPool::ConnectionControls DynamicLimitController::getControls(PoolId id) {
stdx::lock_guard lk(_mutex);
return {getPoolOptions().maxConnecting, getOrInvariant(_poolData, id).target};
}
} // namespace mongo::executor
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