def filesystem_cache(self):
if self._filesystem_cache is None:
debug('Loading filesystem metadata...')
st = time.time()
from calibre.devices.mtp.filesystem_cache import FilesystemCache
ts = self.total_space()
all_storage = []
items = []
for storage_id, capacity in zip([self._main_id, self._carda_id,
self._cardb_id], ts):
if storage_id is None:
continue
name = _('Unknown')
for s in self.dev.data['storage']:
if s['id'] == storage_id:
name = s['name']
break
storage = {'id':storage_id, 'size':capacity, 'name':name,
'is_folder':True, 'can_delete':False, 'is_system':True}
self._currently_getting_sid = unicode(storage_id)
id_map = self.dev.get_filesystem(storage_id, partial(
self._filesystem_callback, {}))
for x in id_map.itervalues():
x['storage_id'] = storage_id
all_storage.append(storage)
items.append(id_map.itervalues())
self._filesystem_cache = FilesystemCache(all_storage, chain(*items))
debug('Filesystem metadata loaded in %g seconds (%d objects)'%(
time.time()-st, len(self._filesystem_cache)))
return self._filesystem_cache
def filesystem_cache(self):
if self._filesystem_cache is None:
st = time.time()
debug('Loading filesystem metadata...')
from calibre.devices.mtp.filesystem_cache import FilesystemCache
with self.lock:
storage, all_items, all_errs = [], [], []
for sid, capacity in zip(
[self._main_id, self._carda_id, self._cardb_id],
self.total_space()):
if sid is None:
continue
name = _('Unknown')
for x in self.dev.storage_info:
if x['id'] == sid:
name = x['name']
break
storage.append({
'id': sid,
'size': capacity,
'is_folder': True,
'name': name,
'can_delete': False,
'is_system': True
})
self._currently_getting_sid = str(sid)
items, errs = self.dev.get_filesystem(
sid, partial(self._filesystem_callback, {}))
all_items.extend(items), all_errs.extend(errs)
if not all_items and all_errs:
raise DeviceError(
'Failed to read filesystem from %s with errors: %s' %
(self.current_friendly_name,
self.format_errorstack(all_errs)))
if all_errs:
prints('There were some errors while getting the '
' filesystem from %s: %s' %
(self.current_friendly_name,
self.format_errorstack(all_errs)))
self._filesystem_cache = FilesystemCache(storage, all_items)
debug('Filesystem metadata loaded in %g seconds (%d objects)' %
(time.time() - st, len(self._filesystem_cache)))
return self._filesystem_cache
