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Ensure initialization is thread safe

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Kovid Goyal 2022-05-02 08:11:06 +05:30
parent 958625f660
commit 368bba0ac3
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1 changed files with 22 additions and 15 deletions
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15
src/calibre/db/fts/connect.py
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@ -3,15 +3,17 @@
# License: GPL v3 Copyright: 2022, Kovid Goyal <kovid at kovidgoyal.net>
import builtins, apsw
import apsw
import builtins
import hashlib
import os
import sys
from contextlib import suppress
from threading import Lock
from calibre.utils.date import EPOCH, utcnow
from calibre.db import FTSQueryError
from calibre.db.annotations import unicode_normalize
from calibre.utils.date import EPOCH, utcnow
from .pool import Pool
from .schema_upgrade import SchemaUpgrade
@ -32,18 +34,24 @@ class FTS:
def __init__(self, dbref):
self.dbref = dbref
self.pool = Pool(dbref)
self.init_lock = Lock()
def initialize(self, conn):
needs_dirty = False
with self.init_lock:
if conn.fts_dbpath is None:
main_db_path = os.path.abspath(conn.db_filename('main'))
dbpath = os.path.join(os.path.dirname(main_db_path), 'full-text-search.db')
conn.execute(f'ATTACH DATABASE "{dbpath}" AS fts_db')
SchemaUpgrade(conn)
conn.fts_dbpath = dbpath
conn.execute('UPDATE fts_db.dirtied_formats SET in_progress=FALSE WHERE in_progress=TRUE')
num_dirty = conn.get('''SELECT COUNT(*) from fts_db.dirtied_formats''')[0][0]
if not num_dirty:
num_indexed = conn.get('''SELECT COUNT(*) from fts_db.books_text''')[0][0]
if not num_indexed:
needs_dirty = True
conn.fts_dbpath = dbpath
if needs_dirty:
self.dirty_existing()
def get_connection(self):
@ -51,7 +59,6 @@ class FTS:
if db is None:
raise RuntimeError('db has been garbage collected')
ans = db.backend.get_connection()
if ans.fts_dbpath is None:
self.initialize(ans)
return ans