def put(self, data):
if data is None:
return
key = self.__get_pks_str_by_data(data)
logger.LOG_DEBUG('put key:%s', key)
logger.LOG_DEBUG('put data:%s', str(data))
import time
logger.LOG_DEBUG('time now:%d', time.time())
self._cache.set(key, (data, int(time.time())))
def delete(self, data):
if data is None:
return
key = self.__get_pks_str_by_data(data)
logger.LOG_DEBUG('delete key:%s', key)
self._cache.pop(key)
def commit(db):
assert db
try:
yield db
db.commit()
logger.LOG_DEBUG("数据库连接[{id}]已经提交.".format(id=id(db)))
except:
db.rollback()
logger.LOG_TRACE("数据库连接[{id}]已经回滚.".format(id=id(db)))
raise
def find_one(self, **pks):
cache_data = None
try:
cache_data = self.cache_table.get(**pks)
except Exception as e:
logger.LOG_WARNING('读取缓存数据时异常:%s', str(e))
if cache_data is not None:
logger.LOG_DEBUG('find data in[%s]:%s', self.cache_table._name,
str(cache_data))
return cache_data
db_data = self._db_dao.find_one(**pks)
self.cache_table.put(db_data)
return db_data
def get(self, **pks):
pks_str = self.__get_pks_str(**pks)
logger.LOG_DEBUG('pks_str:%s cache name:%s', pks_str, self._name)
item = self._cache.get(pks_str)
if item is None:
logger.LOG_DEBUG('no data found.')
return None
data, stamp = item
logger.LOG_DEBUG('find data：%s', str(data))
logger.LOG_DEBUG('timestamp:%d', stamp)
import time
to_now_sec = int(time.time()) - int(stamp) # to_sec
logger.LOG_DEBUG('to_now_sec:%d', to_now_sec)
if to_now_sec > self._duration:
logger.LOG_DEBUG('data expired.')
return None
return data
def __getattr__(self, name):
"""这个方法在访问的attribute不存在的时候被调用
the __getattr__() method is actually a fallback method
that only gets called when an attribute is not found"""
logger.LOG_DEBUG('CacheDao中没有改属性:%s', name)
return getattr(self._db_dao, name)