113 lines
3.8 KiB
C++
113 lines
3.8 KiB
C++
/*
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* LMDB Abstraction Layer.
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* Copyright (C) 2023 Yury Gubich <blue@macaw.me>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LMDBAL_STORAGE_H
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#define LMDBAL_STORAGE_H
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#include "base.h"
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#include "serializer.h"
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namespace LMDBAL {
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class iStorage {
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friend class Base;
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protected:
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iStorage(const std::string& name, Base* parent);
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virtual ~iStorage();
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virtual int createTable(MDB_txn * transaction) = 0;
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virtual int drop(MDB_txn * transaction);
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bool isDBOpened() const;
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const std::string& dbName() const;
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void ensureOpened(const std::string& methodName) const;
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void throwDuplicateOrUnknown(int rc, TransactionID txn, const std::string& key) const;
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void throwNotFoundOrUnknown(int rc, TransactionID txn, const std::string& key) const;
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void throwUnknown(int rc, TransactionID txn) const;
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void throwUnknown(int rc) const;
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void throwDuplicate(const std::string& key) const;
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void throwNotFound(const std::string& key)const ;
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public:
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virtual void drop();
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virtual uint32_t count() const;
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TransactionID beginReadOnlyTransaction() const;
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TransactionID beginTransaction() const;
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void commitTransaction(TransactionID id) const;
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void abortTransaction(TransactionID id) const;
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protected:
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MDB_dbi dbi;
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Base* db;
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const std::string name;
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inline static const std::string dropMethodName = "drop";
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inline static const std::string countMethodName = "count";
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inline static const std::string addRecordMethodName = "addRecord";
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inline static const std::string forceRecordMethodName = "forceRecord";
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inline static const std::string changeRecordMethodName = "changeRecord";
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inline static const std::string removeRecordMethodName = "removeRecord";
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inline static const std::string checkRecordMethodName = "checkRecord";
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inline static const std::string getRecordMethodName = "getRecord";
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inline static const std::string readAllMethodName = "readAllRecord";
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inline static const std::string replaceAllMethodName = "replaceAll";
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inline static const std::string addRecordsMethodName = "addRecords";
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protected:
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template <class T>
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int makeTable(MDB_txn* transaction);
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template <class T>
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static std::string toString(const T& value);
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};
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template <class K, class V>
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class Storage : public iStorage {
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friend class Base;
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protected:
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Storage(const std::string& name, Base* parent);
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~Storage() override;
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public:
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using iStorage::drop;
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virtual void addRecord(const K& key, const V& value);
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virtual bool forceRecord(const K& key, const V& value); //returns true if there was addition, false if change
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virtual void changeRecord(const K& key, const V& value);
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virtual void removeRecord(const K& key);
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virtual bool checkRecord(const K& key) const; //checks if there is a record with given key
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virtual V getRecord(const K& key) const;
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virtual std::map<K, V> readAll() const;
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virtual void replaceAll(const std::map<K, V>& data);
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virtual uint32_t addRecords(const std::map<K, V>& data, bool overwrite = false);
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protected:
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Serializer<K>* keySerializer;
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Serializer<V>* valueSerializer;
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int createTable(MDB_txn* transaction) override;
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};
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}
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#include "storage.hpp"
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#endif //LMDBAL_STORAGE_H
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