def _list(self, queue, project=None, marker=None,
limit=storage.DEFAULT_MESSAGES_PER_PAGE,
echo=False, client_uuid=None,
include_claimed=False, sort=1):
"""List messages in the queue, oldest first(ish)
Time ordering and message inclusion in lists are soft, there is no
global order and times are based on the UTC time of the zaqar-api
server that the message was created from.
Here be consistency dragons.
"""
if not self._queue_ctrl.exists(queue, project):
raise errors.QueueDoesNotExist(queue, project)
client = self._client
container = utils._message_container(queue, project)
query_string = None
if sort == -1:
query_string = 'reverse=on'
try:
_, objects = client.get_container(
container,
marker=marker,
# list 2x the objects because some listing items may have
# expired
limit=limit * 2,
query_string=query_string)
except swiftclient.ClientException as exc:
if exc.http_status == 404:
raise errors.QueueDoesNotExist(queue, project)
raise
def is_claimed(msg, headers):
if include_claimed or msg['claim_id'] is None:
return False
claim_obj = self.driver.claim_controller._get(
queue, msg['claim_id'], project)
return claim_obj is not None and claim_obj['ttl'] > 0
def is_echo(msg, headers):
if echo:
return False
return headers['x-object-meta-clientid'] == str(client_uuid)
filters = [
is_echo,
is_claimed,
]
marker = {}
get_object = functools.partial(client.get_object, container)
list_objects = functools.partial(client.get_container, container,
limit=limit * 2,
query_string=query_string)
yield utils._filter_messages(objects, filters, marker, get_object,
list_objects, limit=limit)
yield marker and marker['next']
def _list(self, queue, project=None, marker=None,
limit=storage.DEFAULT_MESSAGES_PER_PAGE,
echo=False, client_uuid=None,
include_claimed=False, include_delayed=False,
sort=1):
"""List messages in the queue, oldest first(ish)
Time ordering and message inclusion in lists are soft, there is no
global order and times are based on the UTC time of the zaqar-api
server that the message was created from.
Here be consistency dragons.
"""
if not self._queue_ctrl.exists(queue, project):
raise errors.QueueDoesNotExist(queue, project)
client = self._client
container = utils._message_container(queue, project)
query_string = None
if sort == -1:
query_string = 'reverse=on'
try:
_, objects = client.get_container(
container,
marker=marker,
# list 2x the objects because some listing items may have
# expired
limit=limit * 2,
query_string=query_string)
except swiftclient.ClientException as exc:
if exc.http_status == 404:
raise errors.QueueDoesNotExist(queue, project)
raise
def is_claimed(msg, headers):
if include_claimed or msg['claim_id'] is None:
return False
claim_obj = self.driver.claim_controller._get(
queue, msg['claim_id'], project)
return claim_obj is not None and claim_obj['ttl'] > 0
def is_delayed(msg, headers):
if include_delayed:
return False
now = timeutils.utcnow_ts()
return msg.get('delay_expires', 0) > now
def is_echo(msg, headers):
if echo:
return False
return headers['x-object-meta-clientid'] == str(client_uuid)
filters = [
is_echo,
is_claimed,
is_delayed,
]
marker = {}
get_object = functools.partial(client.get_object, container)
list_objects = functools.partial(client.get_container, container,
limit=limit * 2,
query_string=query_string)
yield utils._filter_messages(objects, filters, marker, get_object,
list_objects, limit=limit)
yield marker and marker['next']
