"""Exceptions used by amqp"""
# Copyright (C) 2007-2008 Barry Pederson <bp@barryp.org>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
from __future__ import absolute_import
from struct import pack, unpack
__all__ = [
'AMQPError',
'ConnectionError', 'ChannelError',
'RecoverableConnectionError', 'IrrecoverableConnectionError',
'RecoverableChannelError', 'IrrecoverableChannelError',
'ConsumerCancelled', 'ContentTooLarge', 'NoConsumers',
'ConnectionForced', 'InvalidPath', 'AccessRefused', 'NotFound',
'ResourceLocked', 'PreconditionFailed', 'FrameError', 'FrameSyntaxError',
'InvalidCommand', 'ChannelNotOpen', 'UnexpectedFrame', 'ResourceError',
'NotConfirmed', 'NotAllowed', 'AMQPNotImplementedError', 'InternalError',
]
class AMQPError(Exception):
code = 0
def __init__(self, reply_text=None, method_sig=None,
method_name=None, reply_code=None):
self.message = reply_text
self.reply_code = reply_code or self.code
self.reply_text = reply_text
self.method_sig = method_sig
self.method_name = method_name or ''
if method_sig and not self.method_name:
self.method_name = METHOD_NAME_MAP.get(method_sig, '')
Exception.__init__(self, reply_code,
reply_text, method_sig, self.method_name)
def __str__(self):
if self.method:
return '{0.method}: ({0.reply_code}) {0.reply_text}'.format(self)
return self.reply_text or '<AMQPError: unknown error>'
@property
def method(self):
return self.method_name or self.method_sig
class ConnectionError(AMQPError):
pass
class ChannelError(AMQPError):
pass
class RecoverableChannelError(ChannelError):
pass
class IrrecoverableChannelError(ChannelError):
pass
class RecoverableConnectionError(ConnectionError):
pass
class IrrecoverableConnectionError(ConnectionError):
pass
class Blocked(RecoverableConnectionError):
pass
class ConsumerCancelled(RecoverableConnectionError):
pass
class ContentTooLarge(RecoverableChannelError):
code = 311
class NoConsumers(RecoverableChannelError):
code = 313
class ConnectionForced(RecoverableConnectionError):
code = 320
class InvalidPath(IrrecoverableConnectionError):
code = 402
class AccessRefused(IrrecoverableChannelError):
code = 403
class NotFound(IrrecoverableChannelError):
code = 404
class NotConfirmed(RecoverableConnectionError):
pass
class ResourceLocked(RecoverableChannelError):
code = 405
class PreconditionFailed(IrrecoverableChannelError):
code = 406
class FrameError(IrrecoverableConnectionError):
code = 501
class FrameSyntaxError(IrrecoverableConnectionError):
code = 502
class InvalidCommand(IrrecoverableConnectionError):
code = 503
class ChannelNotOpen(IrrecoverableConnectionError):
code = 504
class UnexpectedFrame(IrrecoverableConnectionError):
code = 505
class ResourceError(RecoverableConnectionError):
code = 506
class NotAllowed(IrrecoverableConnectionError):
code = 530
class AMQPNotImplementedError(IrrecoverableConnectionError):
code = 540
class InternalError(IrrecoverableConnectionError):
code = 541
ERROR_MAP = {
311: ContentTooLarge,
313: NoConsumers,
320: ConnectionForced,
402: InvalidPath,
403: AccessRefused,
404: NotFound,
405: ResourceLocked,
406: PreconditionFailed,
501: FrameError,
502: FrameSyntaxError,
503: InvalidCommand,
504: ChannelNotOpen,
505: UnexpectedFrame,
506: ResourceError,
530: NotAllowed,
540: AMQPNotImplementedError,
541: InternalError,
}
def error_for_code(code, text, method, default):
try:
return ERROR_MAP[code](text, method, reply_code=code)
except KeyError:
return default(text, method, reply_code=code)
def raise_for_code(code, text, method, default):
raise error_for_code(code, text, method, default)
METHOD_NAME_MAP = {
(10, 10): 'Connection.start',
(10, 11): 'Connection.start_ok',
(10, 20): 'Connection.secure',
(10, 21): 'Connection.secure_ok',
(10, 30): 'Connection.tune',
(10, 31): 'Connection.tune_ok',
(10, 40): 'Connection.open',
(10, 41): 'Connection.open_ok',
(10, 50): 'Connection.close',
(10, 51): 'Connection.close_ok',
(20, 10): 'Channel.open',
(20, 11): 'Channel.open_ok',
(20, 20): 'Channel.flow',
(20, 21): 'Channel.flow_ok',
(20, 40): 'Channel.close',
(20, 41): 'Channel.close_ok',
(30, 10): 'Access.request',
(30, 11): 'Access.request_ok',
(40, 10): 'Exchange.declare',
(40, 11): 'Exchange.declare_ok',
(40, 20): 'Exchange.delete',
(40, 21): 'Exchange.delete_ok',
(40, 30): 'Exchange.bind',
(40, 31): 'Exchange.bind_ok',
(40, 40): 'Exchange.unbind',
(40, 41): 'Exchange.unbind_ok',
(50, 10): 'Queue.declare',
(50, 11): 'Queue.declare_ok',
(50, 20): 'Queue.bind',
(50, 21): 'Queue.bind_ok',
(50, 30): 'Queue.purge',
(50, 31): 'Queue.purge_ok',
(50, 40): 'Queue.delete',
(50, 41): 'Queue.delete_ok',
(50, 50): 'Queue.unbind',
(50, 51): 'Queue.unbind_ok',
(60, 10): 'Basic.qos',
(60, 11): 'Basic.qos_ok',
(60, 20): 'Basic.consume',
(60, 21): 'Basic.consume_ok',
(60, 30): 'Basic.cancel',
(60, 31): 'Basic.cancel_ok',
(60, 40): 'Basic.publish',
(60, 50): 'Basic.return',
(60, 60): 'Basic.deliver',
(60, 70): 'Basic.get',
(60, 71): 'Basic.get_ok',
(60, 72): 'Basic.get_empty',
(60, 80): 'Basic.ack',
(60, 90): 'Basic.reject',
(60, 100): 'Basic.recover_async',
(60, 110): 'Basic.recover',
(60, 111): 'Basic.recover_ok',
(60, 120): 'Basic.nack',
(90, 10): 'Tx.select',
(90, 11): 'Tx.select_ok',
(90, 20): 'Tx.commit',
(90, 21): 'Tx.commit_ok',
(90, 30): 'Tx.rollback',
(90, 31): 'Tx.rollback_ok',
(85, 10): 'Confirm.select',
(85, 11): 'Confirm.select_ok',
}
for _method_id, _method_name in list(METHOD_NAME_MAP.items()):
METHOD_NAME_MAP[unpack('>I', pack('>HH', *_method_id))[0]] = _method_name