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/**
* Copyright (C) 2022-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 "mongo/platform/basic.h"
#include "mongo/db/catalog/derived_metadata_collection_controller.h"
#include "mongo/db/operation_context.h"
namespace mongo {
const auto getCollectionController =
SharedCollectionDecorations::declareDecoration<DerivedMetadataCollectionController>();
DerivedMetadataCollectionController& DerivedMetadataCollectionController::get(
const Collection* coll) {
return getCollectionController(coll->getSharedDecorations());
}
void DerivedMetadataCollectionController::registerDelta(DerivedMetadataDelta delta,
const Timestamp& commitTs) {
delta.timestamp = commitTs;
stdx::lock_guard lock(_queueMutex);
_deltaQueue.emplace(std::make_pair(commitTs, delta));
}
std::vector<DerivedMetadataDelta> DerivedMetadataCollectionController::fetchDeltasUpTo(
const Timestamp& timestamp) {
std::vector<DerivedMetadataDelta> requestedDeltas;
std::map<Timestamp, DerivedMetadataDelta>::iterator it;
for (it = _deltaQueue.begin(); it != _deltaQueue.end(); ++it) {
const auto& currTimestamp = it->first;
const auto& currDelta = it->second;
if (currTimestamp > timestamp) {
break;
}
requestedDeltas.push_back(currDelta);
}
// Erase the deltas up to the validTs.
stdx::lock_guard lock(_queueMutex);
_deltaQueue.erase(_deltaQueue.begin(), it);
return requestedDeltas;
}
} // namespace mongo
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