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#
# 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.
from heat.engine.resources import signal_responder
from heat.engine.resources import wait_condition as wc_base
from heat.engine import support
class WaitConditionHandle(wc_base.BaseWaitConditionHandle):
"""AWS WaitConditionHandle resource.
the main point of this class is to :
have no dependencies (so the instance can reference it)
generate a unique url (to be returned in the reference)
then the cfn-signal will use this url to post to and
WaitCondition will poll it to see if has been written to.
"""
support_status = support.SupportStatus(version='2014.1')
METADATA_KEYS = (
DATA, REASON, STATUS, UNIQUE_ID
) = (
'Data', 'Reason', 'Status', 'UniqueId'
)
def get_reference_id(self):
if self.resource_id:
wc = signal_responder.WAITCONDITION
return str(self._get_ec2_signed_url(signal_type=wc))
else:
return str(self.name)
def metadata_update(self, new_metadata=None):
"""DEPRECATED. Should use handle_signal instead."""
self.handle_signal(details=new_metadata)
def handle_signal(self, details=None):
"""Validate and update the resource metadata.
metadata must use the following format::
{
"Status" : "Status (must be SUCCESS or FAILURE)",
"UniqueId" : "Some ID, should be unique for Count>1",
"Data" : "Arbitrary Data",
"Reason" : "Reason String"
}
"""
if details is None:
return
return super(WaitConditionHandle, self).handle_signal(details)
def resource_mapping():
return {
'AWS::CloudFormation::WaitConditionHandle': WaitConditionHandle,
}
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