LCOV - code coverage report
Current view: top level - include/daemon/backend/metadata - metadata_backend.hpp (source / functions) Hit Total Coverage
Test: coverage.info Lines: 28 31 90.3 %
Date: 2024-04-23 00:09:24 Functions: 10 11 90.9 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*
       2             :   Copyright 2018-2024, Barcelona Supercomputing Center (BSC), Spain
       3             :   Copyright 2015-2024, Johannes Gutenberg Universitaet Mainz, Germany
       4             : 
       5             :   This software was partially supported by the
       6             :   EC H2020 funded project NEXTGenIO (Project ID: 671951, www.nextgenio.eu).
       7             : 
       8             :   This software was partially supported by the
       9             :   ADA-FS project under the SPPEXA project funded by the DFG.
      10             : 
      11             :   This file is part of GekkoFS.
      12             : 
      13             :   GekkoFS is free software: you can redistribute it and/or modify
      14             :   it under the terms of the GNU General Public License as published by
      15             :   the Free Software Foundation, either version 3 of the License, or
      16             :   (at your option) any later version.
      17             : 
      18             :   GekkoFS is distributed in the hope that it will be useful,
      19             :   but WITHOUT ANY WARRANTY; without even the implied warranty of
      20             :   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      21             :   GNU General Public License for more details.
      22             : 
      23             :   You should have received a copy of the GNU General Public License
      24             :   along with GekkoFS.  If not, see <https://www.gnu.org/licenses/>.
      25             : 
      26             :   SPDX-License-Identifier: GPL-3.0-or-later
      27             : */
      28             : 
      29             : #ifndef GEKKOFS_METADATA_BACKEND_HPP
      30             : #define GEKKOFS_METADATA_BACKEND_HPP
      31             : 
      32             : #include <memory>
      33             : #include <spdlog/spdlog.h>
      34             : #include <daemon/backend/exceptions.hpp>
      35             : #include <tuple>
      36             : 
      37             : namespace gkfs::metadata {
      38             : 
      39             : 
      40          33 : class AbstractMetadataBackend {
      41             : public:
      42             :     virtual ~AbstractMetadataBackend() = default;
      43             : 
      44             :     virtual std::string
      45             :     get(const std::string& key) const = 0;
      46             : 
      47             :     virtual void
      48             :     put(const std::string& key, const std::string& val) = 0;
      49             : 
      50             :     virtual void
      51             :     put_no_exist(const std::string& key, const std::string& val) = 0;
      52             : 
      53             :     virtual void
      54             :     remove(const std::string& key) = 0;
      55             : 
      56             :     virtual bool
      57             :     exists(const std::string& key) = 0;
      58             : 
      59             :     virtual void
      60             :     update(const std::string& old_key, const std::string& new_key,
      61             :            const std::string& val) = 0;
      62             : 
      63             :     virtual off_t
      64             :     increase_size(const std::string& key, size_t size, off_t offset,
      65             :                   bool append) = 0;
      66             : 
      67             :     virtual void
      68             :     decrease_size(const std::string& key, size_t size) = 0;
      69             : 
      70             :     virtual std::vector<std::pair<std::string, bool>>
      71             :     get_dirents(const std::string& dir) const = 0;
      72             : 
      73             :     virtual std::vector<std::tuple<std::string, bool, size_t, time_t>>
      74             :     get_dirents_extended(const std::string& dir) const = 0;
      75             : 
      76             :     virtual void
      77             :     iterate_all() const = 0;
      78             : };
      79             : 
      80             : template <typename T>
      81          33 : class MetadataBackend : public AbstractMetadataBackend {
      82             : private:
      83             :     std::string path;
      84             :     std::shared_ptr<spdlog::logger> log_;
      85             : 
      86             : public:
      87             :     std::string
      88        1403 :     get(const std::string& key) const {
      89        1403 :         return static_cast<T const&>(*this).get_impl(key);
      90             :     }
      91             : 
      92             :     void
      93        1097 :     put(const std::string& key, const std::string& val) {
      94        1097 :         static_cast<T&>(*this).put_impl(key, val);
      95        1097 :     }
      96             : 
      97             :     void
      98        1100 :     put_no_exist(const std::string& key, const std::string& val) {
      99        1100 :         static_cast<T&>(*this).put_no_exist_impl(key, val);
     100        1097 :     }
     101             : 
     102             :     void
     103           8 :     remove(const std::string& key) {
     104           8 :         static_cast<T&>(*this).remove_impl(key);
     105           8 :     }
     106             : 
     107             :     bool
     108        1100 :     exists(const std::string& key) {
     109        1100 :         return static_cast<T&>(*this).exists_impl(key);
     110             :     }
     111             : 
     112             :     void
     113          31 :     update(const std::string& old_key, const std::string& new_key,
     114             :            const std::string& val) {
     115          31 :         static_cast<T&>(*this).update_impl(old_key, new_key, val);
     116          31 :     }
     117             : 
     118             :     off_t
     119          41 :     increase_size(const std::string& key, size_t size, off_t offset,
     120             :                   bool append) {
     121          41 :         return static_cast<T&>(*this).increase_size_impl(key, size, offset,
     122          41 :                                                          append);
     123             :     }
     124             : 
     125             :     void
     126           3 :     decrease_size(const std::string& key, size_t size) {
     127           3 :         static_cast<T&>(*this).decrease_size_impl(key, size);
     128           3 :     }
     129             : 
     130             :     std::vector<std::pair<std::string, bool>>
     131          25 :     get_dirents(const std::string& dir) const {
     132          25 :         return static_cast<T const&>(*this).get_dirents_impl(dir);
     133             :     }
     134             : 
     135             :     std::vector<std::tuple<std::string, bool, size_t, time_t>>
     136           4 :     get_dirents_extended(const std::string& dir) const {
     137           4 :         return static_cast<T const&>(*this).get_dirents_extended_impl(dir);
     138             :     }
     139             : 
     140             :     void
     141           0 :     iterate_all() const {
     142           0 :         static_cast<T const&>(*this).iterate_all_impl();
     143           0 :     }
     144             : };
     145             : 
     146             : } // namespace gkfs::metadata
     147             : 
     148             : #endif // GEKKOFS_METADATA_BACKEND_HPP

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