Source code for heat.engine.clients.os.zaqar

#
#    Licensed under the Apache License, Version 2.0 (the "License"); you may
#    not use this file except in compliance with the License. You may obtain
#    a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
#    License for the specific language governing permissions and limitations
#    under the License.

import six

from oslo_log import log as logging
from zaqarclient.queues.v2 import client as zaqarclient
from zaqarclient.transport import errors as zaqar_errors

from heat.common.i18n import _
from heat.common.i18n import _LE
from heat.engine.clients import client_plugin
from heat.engine import constraints

LOG = logging.getLogger(__name__)

CLIENT_NAME = 'zaqar'


[docs]class ZaqarClientPlugin(client_plugin.ClientPlugin): exceptions_module = zaqar_errors service_types = [MESSAGING] = ['messaging'] DEFAULT_TTL = 3600 def _create(self): return zaqarclient.Client(version=2, session=self.context.keystone_session)
[docs] def create_for_tenant(self, tenant_id, token): con = self.context if token is None: LOG.error(_LE("Zaqar connection failed, no auth_token!")) return None opts = { 'os_auth_token': token, 'os_auth_url': con.auth_url, 'os_project_id': tenant_id, 'os_service_type': self.MESSAGING, } auth_opts = {'backend': 'keystone', 'options': opts} conf = {'auth_opts': auth_opts} endpoint = self.url_for(service_type=self.MESSAGING) return zaqarclient.Client(url=endpoint, conf=conf, version=2)
[docs] def create_from_signed_url(self, project_id, paths, expires, methods, signature): opts = { 'paths': paths, 'expires': expires, 'methods': methods, 'signature': signature, 'os_project_id': project_id, } auth_opts = {'backend': 'signed-url', 'options': opts} conf = {'auth_opts': auth_opts} endpoint = self.url_for(service_type=self.MESSAGING) return zaqarclient.Client(url=endpoint, conf=conf, version=2)
[docs] def is_not_found(self, ex): return isinstance(ex, zaqar_errors.ResourceNotFound)
[docs] def get_queue(self, queue_name): if not isinstance(queue_name, six.string_types): raise TypeError(_('Queue name must be a string')) if not (0 < len(queue_name) <= 64): raise ValueError(_('Queue name length must be 1-64')) # Queues are created automatically starting with v1.1 of the Zaqar API, # so any queue name is valid for the purposes of constraint validation. return queue_name
[docs]class ZaqarEventSink(object): def __init__(self, target, ttl=None): self._target = target self._ttl = ttl
[docs] def consume(self, context, event): zaqar_plugin = context.clients.client_plugin('zaqar') zaqar = zaqar_plugin.client() queue = zaqar.queue(self._target, auto_create=False) ttl = self._ttl if self._ttl is not None else zaqar_plugin.DEFAULT_TTL queue.post({'body': event, 'ttl': ttl})
[docs]class QueueConstraint(constraints.BaseCustomConstraint): resource_client_name = CLIENT_NAME resource_getter_name = 'get_queue'