115 lines
2.8 KiB
Python
115 lines
2.8 KiB
Python
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from typing import Optional, Sequence # noqa
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__all__ = [
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'RedisError',
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'ProtocolError',
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'ReplyError',
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'MaxClientsError',
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'AuthError',
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'PipelineError',
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'MultiExecError',
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'WatchVariableError',
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'ChannelClosedError',
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'ConnectionClosedError',
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'ConnectionForcedCloseError',
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'PoolClosedError',
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'MasterNotFoundError',
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'SlaveNotFoundError',
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'ReadOnlyError',
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]
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class RedisError(Exception):
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"""Base exception class for aioredis exceptions."""
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class ProtocolError(RedisError):
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"""Raised when protocol error occurs."""
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class ReplyError(RedisError):
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"""Raised for redis error replies (-ERR)."""
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MATCH_REPLY = None # type: Optional[Sequence[str]]
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def __new__(cls, msg, *args):
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for klass in cls.__subclasses__():
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if msg and klass.MATCH_REPLY and msg.startswith(klass.MATCH_REPLY):
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return klass(msg, *args)
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return super().__new__(cls, msg, *args)
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class MaxClientsError(ReplyError):
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"""Raised for redis server when the maximum number of client has been
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reached."""
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MATCH_REPLY = "ERR max number of clients reached"
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class AuthError(ReplyError):
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"""Raised when authentication errors occurs."""
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MATCH_REPLY = (
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"NOAUTH ",
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"ERR invalid password",
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"ERR Client sent AUTH, but no password is set",
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)
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class BusyGroupError(ReplyError):
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"""Raised if Consumer Group name already exists."""
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MATCH_REPLY = "BUSYGROUP Consumer Group name already exists"
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class PipelineError(RedisError):
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"""Raised if command within pipeline raised error."""
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def __init__(self, errors):
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super().__init__('{} errors:'.format(self.__class__.__name__), errors)
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class MultiExecError(PipelineError):
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"""Raised if command within MULTI/EXEC block caused error."""
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class WatchVariableError(MultiExecError):
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"""Raised if watched variable changed (EXEC returns None)."""
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class ChannelClosedError(RedisError):
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"""Raised when Pub/Sub channel is unsubscribed and messages queue is empty.
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"""
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class ReadOnlyError(RedisError):
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"""Raised from slave when read-only mode is enabled"""
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class MasterNotFoundError(RedisError):
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"""Raised for sentinel master not found error."""
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class SlaveNotFoundError(RedisError):
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"""Raised for sentinel slave not found error."""
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class MasterReplyError(RedisError):
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"""Raised by sentinel client for master error replies."""
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class SlaveReplyError(RedisError):
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"""Raised by sentinel client for slave error replies."""
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class ConnectionClosedError(RedisError):
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"""Raised if connection to server was closed."""
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class ConnectionForcedCloseError(ConnectionClosedError):
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"""Raised if connection was closed with .close() method."""
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class PoolClosedError(RedisError):
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"""Raised if pool is closed."""
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