/usr/lib/python2.7/dist-packages/kombu/message.py is in python-kombu 3.0.7-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 | """
kombu.transport.message
=======================
Message class.
"""
from __future__ import absolute_import
from .compression import decompress
from .exceptions import MessageStateError
from .five import text_t
from .serialization import loads
ACK_STATES = frozenset(['ACK', 'REJECTED', 'REQUEUED'])
class Message(object):
"""Base class for received messages."""
__slots__ = ('_state', 'channel', 'delivery_tag',
'content_type', 'content_encoding',
'delivery_info', 'headers', 'properties',
'body', '_decoded_cache', 'accept', '__dict__')
MessageStateError = MessageStateError
def __init__(self, channel, body=None, delivery_tag=None,
content_type=None, content_encoding=None, delivery_info={},
properties=None, headers=None, postencode=None,
accept=None, **kwargs):
self.channel = channel
self.delivery_tag = delivery_tag
self.content_type = content_type
self.content_encoding = content_encoding
self.delivery_info = delivery_info
self.headers = headers or {}
self.properties = properties or {}
self._decoded_cache = None
self._state = 'RECEIVED'
self.accept = accept
try:
body = decompress(body, self.headers['compression'])
except KeyError:
pass
if postencode and isinstance(body, text_t):
body = body.encode(postencode)
self.body = body
def ack(self):
"""Acknowledge this message as being processed.,
This will remove the message from the queue.
:raises MessageStateError: If the message has already been
acknowledged/requeued/rejected.
"""
if self.channel.no_ack_consumers is not None:
try:
consumer_tag = self.delivery_info['consumer_tag']
except KeyError:
pass
else:
if consumer_tag in self.channel.no_ack_consumers:
return
if self.acknowledged:
raise self.MessageStateError(
'Message already acknowledged with state: {0._state}'.format(
self))
self.channel.basic_ack(self.delivery_tag)
self._state = 'ACK'
def ack_log_error(self, logger, errors):
try:
self.ack()
except errors as exc:
logger.critical("Couldn't ack %r, reason:%r",
self.delivery_tag, exc, exc_info=True)
def reject_log_error(self, logger, errors, requeue=False):
try:
self.reject(requeue=requeue)
except errors as exc:
logger.critical("Couldn't reject %r, reason: %r",
self.delivery_tag, exc, exc_info=True)
def reject(self, requeue=False):
"""Reject this message.
The message will be discarded by the server.
:raises MessageStateError: If the message has already been
acknowledged/requeued/rejected.
"""
if self.acknowledged:
raise self.MessageStateError(
'Message already acknowledged with state: {0._state}'.format(
self))
self.channel.basic_reject(self.delivery_tag, requeue=requeue)
self._state = 'REJECTED'
def requeue(self):
"""Reject this message and put it back on the queue.
You must not use this method as a means of selecting messages
to process.
:raises MessageStateError: If the message has already been
acknowledged/requeued/rejected.
"""
if self.acknowledged:
raise self.MessageStateError(
'Message already acknowledged with state: {0._state}'.format(
self))
self.channel.basic_reject(self.delivery_tag, requeue=True)
self._state = 'REQUEUED'
def decode(self):
"""Deserialize the message body, returning the original
python structure sent by the publisher."""
return loads(self.body, self.content_type,
self.content_encoding, accept=self.accept)
@property
def acknowledged(self):
"""Set to true if the message has been acknowledged."""
return self._state in ACK_STATES
@property
def payload(self):
"""The decoded message body."""
if not self._decoded_cache:
self._decoded_cache = self.decode()
return self._decoded_cache
|