mirror of
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96 lines
2.7 KiB
Python
96 lines
2.7 KiB
Python
"""
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# Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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from typing import Optional, List
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from redis.typing import Number
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import redis
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from packaging import version
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import re
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LUA_SCRIPT_LPOP = """
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local key = KEYS[1]
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local count = tonumber(ARGV[1])
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local elements = redis.call('LRANGE', key, 0, count - 1)
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local elementsCount = #elements
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if elementsCount > 0 then
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redis.call('LTRIM', key, count, -1)
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end
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return elements
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"""
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class AdaptedRedis(redis.Redis):
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"""
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AdaptedRedis class: Adapt to different versions of Redis
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"""
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def __init__(self, **kwargs):
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super().__init__(**kwargs)
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self._old_version = False
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self._parse_version()
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self._warm_up()
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def _parse_version(self):
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"""
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parse version
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"""
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server_info = self.info(section='server')
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version_string = server_info['redis_version']
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match = re.search(r'^(\d+\.\d+\.\d+)', version_string)
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if match:
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redis_version = match.group(1)
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else:
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redis_version = "0.0.0"
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current_version = version.parse(redis_version)
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target_version = version.parse("6.2.28")
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if current_version <= target_version:
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self._old_version = True
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self.version = redis_version
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def _warm_up(self):
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"""
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preload some lua scripts
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"""
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if self._old_version:
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self._lpop = self.register_script(LUA_SCRIPT_LPOP)
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def lpop(self, name: str, count: Optional[int] = None):
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"""
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similar to redis lpop
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"""
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if self._old_version and count is not None:
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return self._lpop(keys=[name], args=[count])
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return super().lpop(name, count)
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def blpop(self, keys: List, timeout: Optional[Number] = 0):
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"""
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similar to redis blpop
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"""
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if self._old_version:
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if timeout > 0 and timeout < 1:
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timeout = 1
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timeout = int(timeout)
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return super().blpop(keys=keys, timeout=timeout)
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if timeout > 0 and timeout < 0.01:
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timeout = 0.01
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return super().blpop(keys=keys, timeout=timeout) |