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__all__ = [
'RedisError',
'ProtocolError',
'ReplyError',
'MaxClientsError',
'AuthError',
'PipelineError',
'MultiExecError',
'WatchVariableError',
'ChannelClosedError',
'ConnectionClosedError',
'ConnectionForcedCloseError',
'PoolClosedError',
'MasterNotFoundError',
'SlaveNotFoundError',
'ReadOnlyError',
]
class RedisError(Exception):
"""Base exception class for aioredis exceptions."""
class ProtocolError(RedisError):
"""Raised when protocol error occurs."""
class ReplyError(RedisError):
"""Raised for redis error replies (-ERR)."""
MATCH_REPLY = None
def __new__(cls, msg, *args):
for klass in cls.__subclasses__():
if msg and klass.MATCH_REPLY and msg.startswith(klass.MATCH_REPLY):
return klass(msg, *args)
return super().__new__(cls, msg, *args)
class MaxClientsError(ReplyError):
"""Raised for redis server when the maximum number of client has been
reached."""
MATCH_REPLY = "ERR max number of clients reached"
class AuthError(ReplyError):
"""Raised when authentication errors occurs."""
MATCH_REPLY = ("NOAUTH ", "ERR invalid password")
class PipelineError(RedisError):
"""Raised if command within pipeline raised error."""
def __init__(self, errors):
super().__init__('{} errors:'.format(self.__class__.__name__), errors)
class MultiExecError(PipelineError):
"""Raised if command within MULTI/EXEC block caused error."""
class WatchVariableError(MultiExecError):
"""Raised if watched variable changed (EXEC returns None)."""
class ChannelClosedError(RedisError):
"""Raised when Pub/Sub channel is unsubscribed and messages queue is empty.
"""
class ReadOnlyError(RedisError):
"""Raised from slave when read-only mode is enabled"""
class MasterNotFoundError(RedisError):
"""Raised for sentinel master not found error."""
class SlaveNotFoundError(RedisError):
"""Raised for sentinel slave not found error."""
class MasterReplyError(RedisError):
"""Raised by sentinel client for master error replies."""
class SlaveReplyError(RedisError):
"""Raised by sentinel client for slave error replies."""
class ConnectionClosedError(RedisError):
"""Raised if connection to server was closed."""
class ConnectionForcedCloseError(ConnectionClosedError):
"""Raised if connection was closed with .close() method."""
class PoolClosedError(RedisError):
"""Raised if pool is closed."""