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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 <memory>
#include "mongo/db/storage/journal_listener.h"
#include "mongo/db/storage/kv/kv_engine.h"
#include "mongo/db/storage/mobile/mobile_options.h"
#include "mongo/db/storage/mobile/mobile_session_pool.h"
#include "mongo/stdx/mutex.h"
#include "mongo/util/periodic_runner.h"
#include "mongo/util/string_map.h"
namespace mongo {
class JournalListener;
class MobileKVEngine : public KVEngine {
public:
MobileKVEngine(const std::string& path,
const embedded::MobileOptions& options,
ServiceContext* serviceContext);
RecoveryUnit* newRecoveryUnit() override;
Status createRecordStore(OperationContext* opCtx,
StringData ns,
StringData ident,
const CollectionOptions& options) override;
std::unique_ptr<RecordStore> getRecordStore(OperationContext* opCtx,
StringData ns,
StringData ident,
const CollectionOptions& options) override;
std::unique_ptr<RecordStore> makeTemporaryRecordStore(OperationContext* opCtx,
StringData ident) override;
Status createSortedDataInterface(OperationContext* opCtx,
const CollectionOptions& collOptions,
StringData ident,
const IndexDescriptor* desc) override;
std::unique_ptr<SortedDataInterface> getSortedDataInterface(
OperationContext* opCtx, StringData ident, const IndexDescriptor* desc) override;
Status beginBackup(OperationContext* opCtx) override {
return Status::OK();
}
void endBackup(OperationContext* opCtx) override {}
Status dropIdent(OperationContext* opCtx, StringData ident) override;
bool supportsDocLocking() const override {
return false;
}
bool supportsDBLocking() const override {
return false;
}
bool supportsCappedCollections() const override {
return false;
}
bool supportsDirectoryPerDB() const override {
return false;
}
bool isDurable() const override {
return true;
}
/**
* Flush is a no-op since SQLite transactions are durable by default after each commit.
*/
int flushAllFiles(OperationContext* opCtx, bool sync) override {
return 0;
}
bool isEphemeral() const override {
return false;
}
int64_t getIdentSize(OperationContext* opCtx, StringData ident) override;
Status repairIdent(OperationContext* opCtx, StringData ident) override {
return Status::OK();
}
void cleanShutdown() override;
bool hasIdent(OperationContext* opCtx, StringData ident) const override;
std::vector<std::string> getAllIdents(OperationContext* opCtx) const override;
void setJournalListener(JournalListener* jl) override {
stdx::unique_lock<stdx::mutex> lk(_mutex);
_journalListener = jl;
}
virtual Timestamp getAllDurableTimestamp() const override {
MONGO_UNREACHABLE;
}
virtual Timestamp getOldestOpenReadTimestamp() const override {
return Timestamp();
}
boost::optional<Timestamp> getOplogNeededForCrashRecovery() const final {
return boost::none;
}
private:
void maybeVacuum(Client* client, Date_t deadline);
mutable stdx::mutex _mutex;
void _initDBPath(const std::string& path);
std::int32_t _setSQLitePragma(const std::string& pragma, sqlite3* session);
std::unique_ptr<MobileSessionPool> _sessionPool;
// Notified when we write as everything is considered "journalled" since repl depends on it.
JournalListener* _journalListener = &NoOpJournalListener::instance;
std::string _path;
embedded::MobileOptions _options;
PeriodicJobAnchor _vacuumJob;
};
} // namespace mongo
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