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// ephemeral_for_test_engine.h
/**
* Copyright (C) 2014 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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/stdx/mutex.h"
#include "mongo/util/string_map.h"
namespace mongo {
class JournalListener;
class EphemeralForTestEngine : public KVEngine {
public:
virtual RecoveryUnit* newRecoveryUnit();
virtual Status createRecordStore(OperationContext* opCtx,
StringData ns,
StringData ident,
const CollectionOptions& options);
virtual std::unique_ptr<RecordStore> getRecordStore(OperationContext* opCtx,
StringData ns,
StringData ident,
const CollectionOptions& options);
virtual Status createSortedDataInterface(OperationContext* opCtx,
StringData ident,
const IndexDescriptor* desc);
virtual SortedDataInterface* getSortedDataInterface(OperationContext* opCtx,
StringData ident,
const IndexDescriptor* desc);
virtual Status beginBackup(OperationContext* opCtx) {
return Status::OK();
}
virtual void endBackup(OperationContext* opCtx) {}
virtual Status dropIdent(OperationContext* opCtx, StringData ident);
virtual bool supportsDocLocking() const {
return false;
}
virtual bool supportsDirectoryPerDB() const {
return false;
}
/**
* Data stored in memory is not durable.
*/
virtual bool isDurable() const {
return false;
}
virtual bool isEphemeral() const {
return true;
}
virtual int64_t getIdentSize(OperationContext* opCtx, StringData ident);
virtual Status repairIdent(OperationContext* opCtx, StringData ident) {
return Status::OK();
}
virtual void cleanShutdown(){};
virtual bool hasIdent(OperationContext* opCtx, StringData ident) const {
return _dataMap.find(ident) != _dataMap.end();
;
}
std::vector<std::string> getAllIdents(OperationContext* opCtx) const;
void setJournalListener(JournalListener* jl) final {
stdx::unique_lock<stdx::mutex> lk(_mutex);
_journalListener = jl;
}
virtual Timestamp getAllCommittedTimestamp() const override {
MONGO_UNREACHABLE;
}
private:
typedef StringMap<std::shared_ptr<void>> DataMap;
mutable stdx::mutex _mutex;
DataMap _dataMap; // All actual data is owned in here
// Notified when we write as everything is considered "journalled" since repl depends on it.
JournalListener* _journalListener = &NoOpJournalListener::instance;
};
}
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