def __write_data(self, data) -> None:
self.__WRITE_LOCK.acquire()
self.__data = data
self.__modify_date = util.get_utcnow()
util.dbg_prnt(
f'[PssCache[{self.name}].__write_data] Stored {len(data)} bytes on {self.__modify_date}'
)
self.__WRITE_LOCK.release()
def get_raw_data(self) -> str:
util.dbg_prnt(f'+ PssCache[{self.name}].get_data()')
if self.__get_is_data_outdated():
util.dbg_prnt(f'[PssCache[{self.name}].get_data] Data is outdated')
self.update_data()
can_read = False
while not can_read:
can_read = not self.__get_write_requested()
if not can_read:
time.sleep(random.random())
self.__add_reader()
result = self.__read_data()
self.__remove_reader()
return result
def update_data(self, old_data=None) -> bool:
util.dbg_prnt(f'+ PssCache[{self.name}].update_data(old_data)')
util.dbg_prnt(
f'[PssCache[{self.name}].update_data] Fetch data from path: {self.__update_path}'
)
data = core.get_data_from_path(self.__update_path)
util.dbg_prnt(
f'[PssCache[{self.name}].update_data] Retrieved {len(data)} bytes')
data_changed = data != old_data
if data_changed:
self.__request_write()
can_write = False
while not can_write:
can_write = self.__get_reader_count() == 0
if not can_write:
time.sleep(random.random())
self.__write_data(data)
self.__finish_write()
return True
return False