async def lset(self, key: str, index: int, value: bytes):
async with self._key_lock.acquire(key):
key_meta = await KeyMeta.find_meta(key, self)
if key_meta and key_meta.key_type != KeyTypeEnum.LIST:
raise ValueError(f'key {key} type is not LIST')
async with ListCommand(key, key_meta, self) as command:
await command.set(index, value)
async def lindex(self, key: str, index: int):
async with self._key_lock.acquire(key):
key_meta = await KeyMeta.find_meta(key, self)
if key_meta and key_meta.key_type != KeyTypeEnum.LIST:
raise ValueError(f'key {key} type is not LIST')
if not key_meta:
raise ValueError(f'key {key} not exists')
async with ListCommand(key, key_meta, self) as command:
value = await command.index_of(index)
return value
async def lpush(self, key: str, value: bytes):
async with self._key_lock.acquire(key):
key_meta = await KeyMeta.find_meta(key, self)
if key_meta and key_meta.key_type != KeyTypeEnum.LIST:
raise ValueError(f'key {key} type is not LIST')
if not key_meta:
key_meta = KeyMeta()
key_meta.key = key
key_meta.key_type = KeyTypeEnum.LIST
async with ListCommand(key, key_meta, self) as command:
await command.insert(0, value)
async def delete_key(self, key: str):
async with self._key_lock.acquire(key):
key_meta = await KeyMeta.find_meta(key, self)
if not key_meta:
return False
if key_meta.key_type == KeyTypeEnum.LIST:
async with ListCommand(key, key_meta, self) as command:
await command.deconstruct()
return True
elif key_meta.key_type == KeyTypeEnum.ORDER_LIST:
async with SkipListCommand(key, key_meta, self) as command:
await command.deconstruct()
elif key_meta.key_type == KeyTypeEnum.ORDER_LIST_SET:
async with SkipListCommand(key, key_meta, self) as command:
await command.deconstruct()
elif key_meta.key_type == KeyTypeEnum.ORDER_LIST_ZSET:
async with SkipListCommand(key, key_meta, self) as command:
await command.deconstruct()
else:
return False