def on_patch(self, req, resp, project_id, queue_name, claim_id):
LOG.debug(
_(u'Claim Item PATCH - claim: %(claim_id)s, '
u'queue: %(queue_name)s, project:%(project_id)s') % {
'queue_name': queue_name,
'project_id': project_id,
'claim_id': claim_id
})
# Read claim metadata (e.g., TTL) and raise appropriate
# HTTP errors as needed.
metadata, = wsgi_utils.filter_stream(req.stream, req.content_length,
CLAIM_PATCH_SPEC)
try:
self._validate.claim_updating(metadata)
self.claim_controller.update(queue_name,
claim_id=claim_id,
metadata=metadata,
project=project_id)
resp.status = falcon.HTTP_204
except validation.ValidationFailed as ex:
LOG.debug(ex)
raise wsgi_errors.HTTPBadRequestAPI(six.text_type(ex))
except storage_errors.DoesNotExist as ex:
LOG.debug(ex)
raise falcon.HTTPNotFound()
except Exception as ex:
LOG.exception(ex)
description = _(u'Claim could not be updated.')
raise wsgi_errors.HTTPServiceUnavailable(description)
def _get_by_id(self, base_path, project_id, queue_name, ids):
"""Returns one or more messages from the queue by ID."""
try:
self._validate.message_listing(limit=len(ids))
messages = self.message_controller.bulk_get(queue_name,
message_ids=ids,
project=project_id)
except validation.ValidationFailed as ex:
LOG.debug(ex)
raise wsgi_errors.HTTPBadRequestAPI(six.text_type(ex))
except Exception as ex:
LOG.exception(ex)
description = _(u'Message could not be retrieved.')
raise wsgi_errors.HTTPServiceUnavailable(description)
# Prepare response
messages = list(messages)
if not messages:
return None
base_path += '/'
for each_message in messages:
each_message['href'] = base_path + each_message['id']
del each_message['id']
return messages
def _get(self, req, project_id, queue_name):
client_uuid = wsgi_utils.get_client_uuid(req)
kwargs = {}
# NOTE(kgriffs): This syntax ensures that
# we don't clobber default values with None.
req.get_param('marker', store=kwargs)
req.get_param_as_int('limit', store=kwargs)
req.get_param_as_bool('echo', store=kwargs)
req.get_param_as_bool('include_claimed', store=kwargs)
try:
self._validate.message_listing(**kwargs)
results = self.message_controller.list(queue_name,
project=project_id,
client_uuid=client_uuid,
**kwargs)
# Buffer messages
cursor = next(results)
messages = list(cursor)
except validation.ValidationFailed as ex:
LOG.debug(ex)
raise wsgi_errors.HTTPBadRequestAPI(six.text_type(ex))
except storage_errors.DoesNotExist as ex:
LOG.debug(ex)
raise falcon.HTTPNotFound()
except Exception as ex:
LOG.exception(ex)
description = _(u'Messages could not be listed.')
raise wsgi_errors.HTTPServiceUnavailable(description)
if not messages:
messages = []
else:
# Found some messages, so prepare the response
kwargs['marker'] = next(results)
for each_message in messages:
each_message['href'] = req.path + '/' + each_message['id']
del each_message['id']
return {
'messages':
messages,
'links': [{
'rel': 'next',
'href': req.path + falcon.to_query_str(kwargs)
}]
}
def on_post(self, req, resp, project_id, queue_name):
LOG.debug(
_(u'Claims collection POST - queue: %(queue)s, '
u'project: %(project)s'), {
'queue': queue_name,
'project': project_id
})
# Check for an explicit limit on the # of messages to claim
limit = req.get_param_as_int('limit')
claim_options = {} if limit is None else {'limit': limit}
# Read claim metadata (e.g., TTL) and raise appropriate
# HTTP errors as needed.
metadata, = wsgi_utils.filter_stream(req.stream, req.content_length,
CLAIM_POST_SPEC)
# Claim some messages
try:
self._validate.claim_creation(metadata, limit=limit)
cid, msgs = self.claim_controller.create(queue_name,
metadata=metadata,
project=project_id,
**claim_options)
# Buffer claimed messages
# TODO(kgriffs): optimize, along with serialization (below)
resp_msgs = list(msgs)
except validation.ValidationFailed as ex:
LOG.debug(ex)
raise wsgi_errors.HTTPBadRequestAPI(six.text_type(ex))
except Exception as ex:
LOG.exception(ex)
description = _(u'Claim could not be created.')
raise wsgi_errors.HTTPServiceUnavailable(description)
# Serialize claimed messages, if any. This logic assumes
# the storage driver returned well-formed messages.
if len(resp_msgs) != 0:
for msg in resp_msgs:
msg['href'] = _msg_uri_from_claim(
req.path.rpartition('/')[0], msg['id'], cid)
del msg['id']
resp.location = req.path + '/' + cid
resp.body = utils.to_json(resp_msgs)
resp.status = falcon.HTTP_201
else:
resp.status = falcon.HTTP_204
def on_put(self, req, resp, project_id, queue_name):
LOG.debug(
_(u'Queue metadata PUT - queue: %(queue)s, '
u'project: %(project)s'), {
'queue': queue_name,
'project': project_id
})
try:
# Place JSON size restriction before parsing
self._validate.queue_metadata_length(req.content_length)
except validation.ValidationFailed as ex:
LOG.debug(ex)
raise wsgi_errors.HTTPBadRequestAPI(six.text_type(ex))
# Deserialize queue metadata
metadata, = wsgi_utils.filter_stream(req.stream,
req.content_length,
spec=None)
try:
self.queue_ctrl.set_metadata(queue_name,
metadata=metadata,
project=project_id)
except validation.ValidationFailed as ex:
LOG.debug(ex)
raise wsgi_errors.HTTPBadRequestAPI(six.text_type(ex))
except storage_errors.QueueDoesNotExist:
raise falcon.HTTPNotFound()
except Exception as ex:
LOG.exception(ex)
description = _(u'Metadata could not be updated.')
raise wsgi_errors.HTTPServiceUnavailable(description)
resp.status = falcon.HTTP_204
resp.location = req.path
def on_get(self, req, resp, project_id):
LOG.debug(u'Queue collection GET - project: %(project)s',
{'project': project_id})
kwargs = {}
# NOTE(kgriffs): This syntax ensures that
# we don't clobber default values with None.
req.get_param('marker', store=kwargs)
req.get_param_as_int('limit', store=kwargs)
req.get_param_as_bool('detailed', store=kwargs)
try:
self._validate.queue_listing(**kwargs)
results = self.queue_controller.list(project=project_id, **kwargs)
except validation.ValidationFailed as ex:
LOG.debug(ex)
raise wsgi_errors.HTTPBadRequestAPI(six.text_type(ex))
except Exception as ex:
LOG.exception(ex)
description = _(u'Queues could not be listed.')
raise wsgi_errors.HTTPServiceUnavailable(description)
# Buffer list of queues
queues = list(next(results))
# Check for an empty list
if len(queues) == 0:
resp.status = falcon.HTTP_204
return
# Got some. Prepare the response.
kwargs['marker'] = next(results)
for each_queue in queues:
each_queue['href'] = req.path + '/' + each_queue['name']
response_body = {
'queues': queues,
'links': [
{
'rel': 'next',
'href': req.path + falcon.to_query_str(kwargs)
}
]
}
resp.content_location = req.relative_uri
resp.body = utils.to_json(response_body)
def get_client_uuid(req):
"""Read a required Client-ID from a request.
:param req: A falcon.Request object
:raises: HTTPBadRequest if the Client-ID header is missing or
does not represent a valid UUID
:returns: A UUID object
"""
try:
return uuid.UUID(req.get_header('Client-ID', required=True))
except ValueError:
description = _(u'Malformed hexadecimal UUID.')
raise errors.HTTPBadRequestAPI(description)
def on_delete(self, req, resp, project_id, queue_name):
# NOTE(zyuan): Attempt to delete the whole message collection
# (without an "ids" parameter) is not allowed
ids = req.get_param_as_list('ids', required=True)
try:
self._validate.message_listing(limit=len(ids))
self.message_controller.bulk_delete(queue_name,
message_ids=ids,
project=project_id)
except validation.ValidationFailed as ex:
LOG.debug(ex)
raise wsgi_errors.HTTPBadRequestAPI(six.text_type(ex))
except Exception as ex:
LOG.exception(ex)
description = _(u'Messages could not be deleted.')
raise wsgi_errors.HTTPServiceUnavailable(description)
resp.status = falcon.HTTP_204
def on_delete(self, req, resp, project_id, queue_name):
LOG.debug(
u'Messages collection DELETE - queue: %(queue)s, '
u'project: %(project)s', {
'queue': queue_name,
'project': project_id
})
ids = req.get_param_as_list('ids')
pop_limit = req.get_param_as_int('pop')
try:
self._validate.message_deletion(ids, pop_limit)
except validation.ValidationFailed as ex:
LOG.debug(ex)
raise wsgi_errors.HTTPBadRequestAPI(six.text_type(ex))
if ids:
resp.status = self._delete_messages_by_id(queue_name, ids,
project_id)
elif pop_limit:
resp.status, resp.body = self._pop_messages(
queue_name, project_id, pop_limit)
def on_post(self, req, resp, project_id, queue_name):
LOG.debug(
_(u'Messages collection POST - queue: %(queue)s, '
u'project: %(project)s'), {
'queue': queue_name,
'project': project_id
})
client_uuid = wsgi_utils.get_client_uuid(req)
try:
# Place JSON size restriction before parsing
self._validate.message_length(req.content_length)
except validation.ValidationFailed as ex:
LOG.debug(ex)
raise wsgi_errors.HTTPBadRequestAPI(six.text_type(ex))
# Pull out just the fields we care about
messages = wsgi_utils.filter_stream(req.stream,
req.content_length,
MESSAGE_POST_SPEC,
doctype=wsgi_utils.JSONArray)
# Enqueue the messages
partial = False
try:
self._validate.message_posting(messages)
message_ids = self.message_controller.post(queue_name,
messages=messages,
project=project_id,
client_uuid=client_uuid)
except validation.ValidationFailed as ex:
LOG.debug(ex)
raise wsgi_errors.HTTPBadRequestAPI(six.text_type(ex))
except storage_errors.DoesNotExist as ex:
LOG.debug(ex)
raise falcon.HTTPNotFound()
except storage_errors.MessageConflict as ex:
LOG.exception(ex)
partial = True
message_ids = ex.succeeded_ids
if not message_ids:
# TODO(kgriffs): Include error code that is different
# from the code used in the generic case, below.
description = _(u'No messages could be enqueued.')
raise wsgi_errors.HTTPServiceUnavailable(description)
except Exception as ex:
LOG.exception(ex)
description = _(u'Messages could not be enqueued.')
raise wsgi_errors.HTTPServiceUnavailable(description)
# Prepare the response
ids_value = ','.join(message_ids)
resp.location = req.path + '?ids=' + ids_value
hrefs = [req.path + '/' + id for id in message_ids]
body = {'resources': hrefs, 'partial': partial}
resp.body = utils.to_json(body)
resp.status = falcon.HTTP_201
