/usr/lib/python3/dist-packages/kombu/message.py is in python3-kombu 3.0.33-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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kombu.transport.message
=======================
Message class.
"""
from __future__ import absolute_import
import sys
from .compression import decompress
from .exceptions import MessageStateError
from .five import reraise, 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
errors = None
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.errors = [] if self.errors is None else self.errors
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
compression = self.headers.get('compression')
if not self.errors and compression:
try:
body = decompress(body, compression)
except Exception:
self.errors.append(sys.exc_info())
if not self.errors and postencode and isinstance(body, text_t):
try:
body = body.encode(postencode)
except Exception:
self.errors.append(sys.exc_info())
self.body = body
def _reraise_error(self, callback=None):
try:
reraise(*self.errors[0])
except Exception as exc:
if not callback:
raise
callback(self, exc)
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
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