heat api : add waitcondition to cfn api

Add a new path to the CFN api, which implements CFN style waitcondition
notification - this means we can move away from the separate heat-metadata
service for this purpose, instead using the authenticated CFN API

blueprint metsrv-remove
Change-Id: I62cff7cb4c7a009fea2c8f62ea446d8d758f5429
Signed-off-by: Steven Hardy <shardy@redhat.com>
Steven Hardy 10 years ago
parent 38100845aa
commit 89714b36d4

@ -18,6 +18,7 @@ import routes
from webob import Request
from heat.api.cfn.v1 import stacks
from heat.api.cfn.v1 import waitcondition
from heat.common import wsgi
from heat.openstack.common import log as logging
@ -70,4 +71,13 @@ class API(wsgi.Router):
mapper.connect("/", controller=stacks_resource, action="index")
# Add controller which handles waitcondition notifications
# This is not part of the main CFN API spec, hence handle it
# separately via a different path
waitcondition_controller = waitcondition.create_resource(conf)
super(API, self).__init__(mapper)

@ -0,0 +1,71 @@
# vim: tabstop=4 shiftwidth=4 softtabstop=4
# 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 json
from webob.exc import Response
from heat.common import wsgi
from heat.common import context
from heat.engine import rpcapi as engine_rpcapi
from heat.openstack.common import rpc
def json_response(http_status, data):
"""Create a JSON response with a specific HTTP code."""
response = Response(json.dumps(data))
response.status = http_status
response.content_type = 'application/json'
return response
def json_error(http_status, message):
"""Create a JSON error response."""
body = {'error': message}
return json_response(http_status, body)
class WaitConditionController:
def __init__(self, options):
self.options = options
self.engine_rpcapi = engine_rpcapi.EngineAPI()
def update_waitcondition(self, req, body, stack_id, resource_name):
con = req.context
[error, metadata] = self.engine_rpcapi.metadata_update(con,
if error:
if error == 'stack':
return json_error(404,
'The stack "%s" does not exist.' % stack_id)
return json_error(404,
'The resource "%s" does not exist.' % resource_name)
return json_response(201, {
'resource': resource_name,
'metadata': body,
def create_resource(options):
Stacks resource factory method.
deserializer = wsgi.JSONRequestDeserializer()
serializer = wsgi.JSONResponseSerializer()
return wsgi.Resource(WaitConditionController(options), deserializer,