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feat: Remove shelve picture cache

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- Remove shelve picture cache as it has had a fair number of historical
  issues.  Original issue for which it was added should be long
  resolved.  Additionally this allows additional consolidation of the
  various cache code and potentially dbs in the future.
- Remove all related preferences and related code for changing cache
  backend between sqlite and shelve.
This commit is contained in:
Andrew Senetar 2023-01-06 00:35:23 -06:00
parent 091cae0cc6
commit 83f5e80427
Signed by: arsenetar
GPG Key ID: C63300DCE48AB2F1
7 changed files with 4 additions and 174 deletions
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6
core/app.py
View File

@ -126,8 +126,6 @@ class DupeGuru(Broadcaster):
NAME = PROMPT_NAME = "dupeGuru"
PICTURE_CACHE_TYPE = "sqlite" # set to 'shelve' for a ShelveCache
def __init__(self, view, portable=False):
if view.get_default(DEBUG_MODE_PREFERENCE):
logging.getLogger().setLevel(logging.DEBUG)
@ -153,7 +151,6 @@ class DupeGuru(Broadcaster):
"clean_empty_dirs": False,
"ignore_hardlink_matches": False,
"copymove_dest_type": DestType.RELATIVE,
"picture_cache_type": self.PICTURE_CACHE_TYPE,
"include_exists_check": True,
"rehash_ignore_mtime": False,
}
@ -185,8 +182,7 @@ class DupeGuru(Broadcaster):
self.view.create_results_window()
def _get_picture_cache_path(self):
cache_type = self.options["picture_cache_type"]
cache_name = "cached_pictures.shelve" if cache_type == "shelve" else "cached_pictures.db"
cache_name = "cached_pictures.db"
return op.join(self.appdata, cache_name)
def _get_dupe_sort_key(self, dupe, get_group, key, delta):

141
core/pe/cache_shelve.py
View File

@ -1,141 +0,0 @@
# Copyright 2016 Virgil Dupras
#
# This software is licensed under the "GPLv3" License as described in the "LICENSE" file,
# which should be included with this package. The terms are also available at
# http://www.gnu.org/licenses/gpl-3.0.html
import os
import os.path as op
import shelve
import tempfile
from collections import namedtuple
from core.pe.cache import string_to_colors, colors_to_string
def wrap_path(path):
return f"path:{path}"
def unwrap_path(key):
return key[5:]
def wrap_id(path):
return f"id:{path}"
def unwrap_id(key):
return int(key[3:])
CacheRow = namedtuple("CacheRow", "id path blocks mtime")
class ShelveCache:
"""A class to cache picture blocks in a shelve backend."""
def __init__(self, db=None, readonly=False):
self.istmp = db is None
if self.istmp:
self.dtmp = tempfile.mkdtemp()
self.ftmp = db = op.join(self.dtmp, "tmpdb")
flag = "r" if readonly else "c"
self.shelve = shelve.open(db, flag)
self.maxid = self._compute_maxid()
def __contains__(self, key):
return wrap_path(key) in self.shelve
def __delitem__(self, key):
row = self.shelve[wrap_path(key)]
del self.shelve[wrap_path(key)]
del self.shelve[wrap_id(row.id)]
def __getitem__(self, key):
if isinstance(key, int):
skey = self.shelve[wrap_id(key)]
else:
skey = wrap_path(key)
return string_to_colors(self.shelve[skey].blocks)
def __iter__(self):
return (unwrap_path(k) for k in self.shelve if k.startswith("path:"))
def __len__(self):
return sum(1 for k in self.shelve if k.startswith("path:"))
def __setitem__(self, path_str, blocks):
blocks = colors_to_string(blocks)
if op.exists(path_str):
mtime = int(os.stat(path_str).st_mtime)
else:
mtime = 0
if path_str in self:
rowid = self.shelve[wrap_path(path_str)].id
else:
rowid = self._get_new_id()
row = CacheRow(rowid, path_str, blocks, mtime)
self.shelve[wrap_path(path_str)] = row
self.shelve[wrap_id(rowid)] = wrap_path(path_str)
def _compute_maxid(self):
return max((unwrap_id(k) for k in self.shelve if k.startswith("id:")), default=1)
def _get_new_id(self):
self.maxid += 1
return self.maxid
def clear(self):
self.shelve.clear()
def close(self):
if self.shelve is not None:
self.shelve.close()
if self.istmp:
os.remove(self.ftmp)
os.rmdir(self.dtmp)
self.shelve = None
def filter(self, func):
to_delete = [key for key in self if not func(key)]
for key in to_delete:
del self[key]
def get_id(self, path):
if path in self:
return self.shelve[wrap_path(path)].id
else:
raise ValueError(path)
def get_multiple(self, rowids):
for rowid in rowids:
try:
skey = self.shelve[wrap_id(rowid)]
except KeyError:
continue
yield (rowid, string_to_colors(self.shelve[skey].blocks))
def purge_outdated(self):
"""Go through the cache and purge outdated records.
A record is outdated if the picture doesn't exist or if its mtime is greater than the one in
the db.
"""
todelete = []
for path in self:
row = self.shelve[wrap_path(path)]
if row.mtime and op.exists(path):
picture_mtime = os.stat(path).st_mtime
if int(picture_mtime) <= row.mtime:
# not outdated
continue
todelete.append(path)
for path in todelete:
try:
del self[path]
except KeyError:
# I have no idea why a KeyError sometimes happen, but it does, as we can see in
# #402 and #439. I don't think it hurts to silently ignore the error, so that's
# what we do
pass

10
core/pe/matchblock.py
View File

@ -16,6 +16,7 @@ from hscommon.jobprogress import job
from core.engine import Match
from core.pe.block import avgdiff, DifferentBlockCountError, NoBlocksError
from core.pe.cache_sqlite import SqliteCache
# OPTIMIZATION NOTES:
# The bottleneck of the matching phase is CPU, which is why we use multiprocessing. However, another
@ -50,14 +51,7 @@ except Exception:
def get_cache(cache_path, readonly=False):
if cache_path.endswith("shelve"):
from core.pe.cache_shelve import ShelveCache
return ShelveCache(cache_path, readonly=readonly)
else:
from core.pe.cache_sqlite import SqliteCache
return SqliteCache(cache_path, readonly=readonly)
return SqliteCache(cache_path, readonly=readonly)
def prepare_pictures(pictures, cache_path, with_dimensions, j=job.nulljob):

6
core/tests/cache_test.py
View File

@ -12,7 +12,6 @@ from hscommon.testutil import eq_
try:
from core.pe.cache import colors_to_string, string_to_colors
from core.pe.cache_sqlite import SqliteCache
from core.pe.cache_shelve import ShelveCache
except ImportError:
skip("Can't import the cache module, probably hasn't been compiled.")
@ -133,11 +132,6 @@ class TestCaseSqliteCache(BaseTestCaseCache):
eq_(c["foo"], [(1, 2, 3)])
class TestCaseShelveCache(BaseTestCaseCache):
def get_cache(self, dbname=None):
return ShelveCache(dbname)
class TestCaseCacheSQLEscape:
def get_cache(self):
return SqliteCache()

1
qt/app.py
View File

@ -192,7 +192,6 @@ class DupeGuru(QObject):
scanned_tags.add("year")
self.model.options["scanned_tags"] = scanned_tags
self.model.options["match_scaled"] = self.prefs.match_scaled
self.model.options["picture_cache_type"] = self.prefs.picture_cache_type
self.model.options["include_exists_check"] = self.prefs.include_exists_check
self.model.options["rehash_ignore_mtime"] = self.prefs.rehash_ignore_mtime

11
qt/pe/preferences_dialog.py
View File

@ -4,11 +4,9 @@
# which should be included with this package. The terms are also available at
# http://www.gnu.org/licenses/gpl-3.0.html
from PyQt5.QtWidgets import QFormLayout
from PyQt5.QtCore import Qt
from hscommon.trans import trget
from hscommon.plat import ISLINUX
from qt.radio_box import RadioBox
from core.scanner import ScanType
from core.app import AppMode
@ -35,11 +33,6 @@ class PreferencesDialog(PreferencesDialogBase):
)
self.widgetsVLayout.addWidget(self.ignoreHardlinkMatches)
self.cacheTypeRadio = RadioBox(self, items=["Sqlite", "Shelve"], spread=False)
cache_form = QFormLayout()
cache_form.setLabelAlignment(Qt.AlignLeft)
cache_form.addRow(tr("Picture cache mode:"), self.cacheTypeRadio)
self.widgetsVLayout.addLayout(cache_form)
self._setupBottomPart()
def _setupDisplayPage(self):
@ -64,7 +57,6 @@ show scrollbars to span the view around"
def _load(self, prefs, setchecked, section):
setchecked(self.matchScaledBox, prefs.match_scaled)
self.cacheTypeRadio.selected_index = 1 if prefs.picture_cache_type == "shelve" else 0
# Update UI state based on selected scan type
scan_type = prefs.get_scan_type(AppMode.PICTURE)
@ -75,6 +67,5 @@ show scrollbars to span the view around"
def _save(self, prefs, ischecked):
prefs.match_scaled = ischecked(self.matchScaledBox)
prefs.picture_cache_type = "shelve" if self.cacheTypeRadio.selected_index == 1 else "sqlite"
prefs.details_dialog_override_theme_icons = ischecked(self.details_dialog_override_theme_icons)
prefs.details_dialog_viewers_show_scrollbars = ischecked(self.details_dialog_viewers_show_scrollbars)

3
qt/preferences.py
View File

@ -225,7 +225,6 @@ class Preferences(PreferencesBase):
self.scan_tag_genre = get("ScanTagGenre", self.scan_tag_genre)
self.scan_tag_year = get("ScanTagYear", self.scan_tag_year)
self.match_scaled = get("MatchScaled", self.match_scaled)
self.picture_cache_type = get("PictureCacheType", self.picture_cache_type)
def reset(self):
self.filter_hardness = 95
@ -278,7 +277,6 @@ class Preferences(PreferencesBase):
self.scan_tag_genre = False
self.scan_tag_year = False
self.match_scaled = False
self.picture_cache_type = "sqlite"
def _save_values(self, settings):
set_ = self.set_value
@ -332,7 +330,6 @@ class Preferences(PreferencesBase):
set_("ScanTagGenre", self.scan_tag_genre)
set_("ScanTagYear", self.scan_tag_year)
set_("MatchScaled", self.match_scaled)
set_("PictureCacheType", self.picture_cache_type)
# scan_type is special because we save it immediately when we set it.
def get_scan_type(self, app_mode):