* Copyright (c) Huawei Technologies Co., Ltd. 2025-2025. All rights reserved.
* ubs-engine is licensed under Mulan PSL v2.
* You can use this software according to the terms and conditions of the Mulan PSL v2.
* You may obtain a copy of Mulan PSL v2 at:
* http://license.coscl.org.cn/MulanPSL2
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PSL v2 for more details.
*/
#ifndef UBSE_STORAGE_H
#define UBSE_STORAGE_H
#include <functional>
#include <vector>
#include "ubse_def.h"
namespace ubse::storage {
struct KV {
std::string key;
uint8_t* value = nullptr;
uint32_t valueLen = 0;
bool operator>(const KV& other) const
{
return key > other.key;
}
};
using UbseStorageDealDataFunc =
std::function<void(const std::string& keyPrefix, const std::string& key, const UbseByteBuffer& buff, void* ctx)>;
* @brief 向数据库中插入数据
* @param keyPrefix[in]: key前缀
* @param key[in]: 数据键
* @param data[in]: 数据值
* @return 成功返回0, 失败返回非0
*/
uint32_t UbseStoragePutData(const std::string& keyPrefix, const std::string& key, UbseByteBuffer* data);
* @brief 从数据库中查询数据
* @param keyPrefix[in]: key前缀
* @param key[in]: 数据键
* @param ctx[out]: 上下文指针
* @param func[in]: 数据处理函数,函数调用完后,代表单条数据处理完成,数据内存被释放
* @return UbseResult, 成功返回0, 失败返回非0
*/
uint32_t UbseStorageQueryData(const std::string& keyPrefix, const std::string& key, void* ctx,
UbseStorageDealDataFunc func);
* @brief 从数据库中删除数据
* @param keyPrefix[in]: key前缀
* @param key[in]: 数据键
* @return UbseResult, 成功返回0, 失败返回非0
*/
uint32_t UbseStorageDeleteData(const std::string& keyPrefix, const std::string& key);
* @brief 列出指定前缀的key列表
* @param keyPrefix[in]: key前缀
* @param keys[out]: 匹配的key列表(不含前缀)
* @return 成功返回0, 失败返回非0
*/
uint32_t UbseStorageListKeys(const std::string& keyPrefix, std::vector<std::string>& keys);
}
#endif