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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.
*/
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kStorage
#include "mongo/platform/basic.h"
#include "mongo/db/storage/biggie/biggie_kv_engine.h"
#include <memory>
#include "mongo/db/index/index_descriptor.h"
#include "mongo/db/snapshot_window_options.h"
#include "mongo/db/storage/biggie/biggie_recovery_unit.h"
#include "mongo/db/storage/key_string.h"
#include "mongo/db/storage/record_store.h"
#include "mongo/db/storage/sorted_data_interface.h"
namespace mongo {
namespace biggie {
mongo::RecoveryUnit* KVEngine::newRecoveryUnit() {
return new RecoveryUnit(this, nullptr);
}
void KVEngine::setCachePressureForTest(int pressure) {
// TODO : implement.
}
Status KVEngine::createRecordStore(OperationContext* opCtx,
StringData ns,
StringData ident,
const CollectionOptions& options) {
_idents[ident.toString()] = true;
return Status::OK();
}
std::unique_ptr<mongo::RecordStore> KVEngine::makeTemporaryRecordStore(OperationContext* opCtx,
StringData ident) {
std::unique_ptr<mongo::RecordStore> recordStore =
std::make_unique<RecordStore>("", ident, false);
_idents[ident.toString()] = true;
return recordStore;
};
std::unique_ptr<mongo::RecordStore> KVEngine::getRecordStore(OperationContext* opCtx,
StringData ns,
StringData ident,
const CollectionOptions& options) {
std::unique_ptr<mongo::RecordStore> recordStore;
if (options.capped) {
if (NamespaceString::oplog(ns))
_visibilityManager = std::make_unique<VisibilityManager>();
recordStore = std::make_unique<RecordStore>(
ns,
ident,
options.capped,
options.cappedSize ? options.cappedSize : kDefaultCappedSizeBytes,
options.cappedMaxDocs ? options.cappedMaxDocs : -1,
/*cappedCallback*/ nullptr,
_visibilityManager.get());
} else {
recordStore = std::make_unique<RecordStore>(ns, ident, options.capped);
}
_idents[ident.toString()] = true;
return recordStore;
}
bool KVEngine::trySwapMaster(StringStore& newMaster, uint64_t version) {
stdx::lock_guard<Latch> lock(_masterLock);
invariant(!newMaster.hasBranch() && !_master.hasBranch());
if (_masterVersion != version)
return false;
_master = newMaster;
_masterVersion++;
return true;
}
Status KVEngine::createSortedDataInterface(OperationContext* opCtx,
const CollectionOptions& collOptions,
StringData ident,
const IndexDescriptor* desc) {
_idents[ident.toString()] = false;
return Status::OK(); // I don't think we actually need to do anything here
}
std::unique_ptr<mongo::SortedDataInterface> KVEngine::getSortedDataInterface(
OperationContext* opCtx, StringData ident, const IndexDescriptor* desc) {
_idents[ident.toString()] = false;
return std::make_unique<SortedDataInterface>(opCtx, ident, desc);
}
Status KVEngine::dropIdent(OperationContext* opCtx, mongo::RecoveryUnit* ru, StringData ident) {
Status dropStatus = Status::OK();
if (_idents.count(ident.toString()) > 0) {
// Check if the ident is a RecordStore or a SortedDataInterface then call the corresponding
// truncate. A true value in the map means it is a RecordStore, false a SortedDataInterface.
if (_idents[ident.toString()] == true) { // ident is RecordStore.
CollectionOptions s;
auto rs = getRecordStore(/*unused*/ opCtx, ""_sd, ident, s);
dropStatus =
checked_cast<RecordStore*>(rs.get())->truncateWithoutUpdatingCount(ru).getStatus();
} else { // ident is SortedDataInterface.
auto sdi =
std::make_unique<SortedDataInterface>(Ordering::make(BSONObj()), true, ident);
dropStatus = sdi->truncate(ru);
}
_idents.erase(ident.toString());
}
return dropStatus;
}
class EmptyRecordCursor final : public SeekableRecordCursor {
public:
boost::optional<Record> next() final {
return {};
}
boost::optional<Record> seekExact(const RecordId& id) final {
return {};
}
void save() final {}
bool restore() final {
return true;
}
void detachFromOperationContext() final {}
void reattachToOperationContext(OperationContext* opCtx) final {}
};
} // namespace biggie
} // namespace mongo
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