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Kovid Goyal 2010-09-25 23:35:12 -06:00
parent 2d406112a4
commit 04ccd041e9
3 changed files with 13 additions and 9 deletions
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3
src/calibre/gui2/library/models.py
View File

@ -156,8 +156,7 @@ class BooksModel(QAbstractTableModel): # {{{
self.cover_cache.stop() self.cover_cache.stop()
self.cover_cache = CoverCache(db, FunctionDispatcher(self.db.cover)) self.cover_cache = CoverCache(db, FunctionDispatcher(self.db.cover))
self.cover_cache.start() self.cover_cache.start()
self.metadata_backup = MetadataBackup(db, self.metadata_backup = MetadataBackup(db)
self.db.dump_metadata)
self.metadata_backup.start() self.metadata_backup.start()
def refresh_cover(event, ids): def refresh_cover(event, ids):
if event == 'cover' and self.cover_cache is not None: if event == 'cover' and self.cover_cache is not None:

13
src/calibre/library/caches.py
View File

@ -22,12 +22,17 @@ from calibre.ebooks.metadata import title_sort
from calibre import fit_image, prints from calibre import fit_image, prints
class MetadataBackup(Thread): # {{{ class MetadataBackup(Thread): # {{{
'''
Continuously backup changed metadata into OPF files
in the book directory. This class runs in its own
thread and makes sure that the actual file write happens in the
GUI thread to prevent Windows' file locking from causing problems.
'''
def __init__(self, db, dump_func): def __init__(self, db):
Thread.__init__(self) Thread.__init__(self)
self.daemon = True self.daemon = True
self.db = db self.db = db
self.dump_func = dump_func
self.keep_running = True self.keep_running = True
from calibre.gui2 import FunctionDispatcher from calibre.gui2 import FunctionDispatcher
self.do_write = FunctionDispatcher(self.write) self.do_write = FunctionDispatcher(self.write)
@ -47,7 +52,7 @@ class MetadataBackup(Thread): # {{{
dump = [] dump = []
try: try:
self.dump_func([id_], dump_queue=dump) self.db.dump_metadata([id_], dump_to=dump)
except: except:
prints('Failed to get backup metadata for id:', id_, 'once') prints('Failed to get backup metadata for id:', id_, 'once')
import traceback import traceback
@ -55,7 +60,7 @@ class MetadataBackup(Thread): # {{{
time.sleep(2) time.sleep(2)
dump = [] dump = []
try: try:
self.dump_func([id_], dump_queue=dump) self.db.dump_metadata([id_], dump_to=dump)
except: except:
prints('Failed to get backup metadata for id:', id_, 'again, giving up') prints('Failed to get backup metadata for id:', id_, 'again, giving up')
traceback.print_exc() traceback.print_exc()

6
src/calibre/library/database2.py
View File

@ -567,7 +567,7 @@ class LibraryDatabase2(LibraryDatabase, SchemaUpgrade, CustomColumns):
return self.field_metadata[key] return self.field_metadata[key]
def dump_metadata(self, book_ids=None, remove_from_dirtied=True, def dump_metadata(self, book_ids=None, remove_from_dirtied=True,
commit=True, dump_queue=None): commit=True, dump_to=None):
'Write metadata for each record to an individual OPF file' 'Write metadata for each record to an individual OPF file'
if book_ids is None: if book_ids is None:
book_ids = [x[0] for x in self.conn.get( book_ids = [x[0] for x in self.conn.get(
@ -583,11 +583,11 @@ class LibraryDatabase2(LibraryDatabase, SchemaUpgrade, CustomColumns):
raw = metadata_to_opf(mi) raw = metadata_to_opf(mi)
path = os.path.join(self.abspath(book_id, index_is_id=True), path = os.path.join(self.abspath(book_id, index_is_id=True),
'metadata.opf') 'metadata.opf')
if dump_queue is None: if dump_to is None:
with open(path, 'wb') as f: with open(path, 'wb') as f:
f.write(raw) f.write(raw)
else: else:
dump_queue.append((path, raw)) dump_to.append((path, raw))
if remove_from_dirtied: if remove_from_dirtied:
self.conn.execute('DELETE FROM metadata_dirtied WHERE book=?', self.conn.execute('DELETE FROM metadata_dirtied WHERE book=?',
(book_id,)) (book_id,))