76 lines
2.5 KiB
Python
76 lines
2.5 KiB
Python
#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import six
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from heat.engine.resources import signal_responder
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from heat.engine.resources import wait_condition as wc_base
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from heat.engine import support
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class WaitConditionHandle(wc_base.BaseWaitConditionHandle):
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'''
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the main point of this class is to :
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have no dependencies (so the instance can reference it)
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generate a unique url (to be returned in the reference)
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then the cfn-signal will use this url to post to and
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WaitCondition will poll it to see if has been written to.
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'''
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support_status = support.SupportStatus(version='2014.1')
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METADATA_KEYS = (
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DATA, REASON, STATUS, UNIQUE_ID
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) = (
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'Data', 'Reason', 'Status', 'UniqueId'
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)
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def handle_create(self):
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super(WaitConditionHandle, self).handle_create()
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self.resource_id_set(self._get_user_id())
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def FnGetRefId(self):
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'''
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Override the default resource FnGetRefId so we return the signed URL
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'''
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if self.resource_id:
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wc = signal_responder.WAITCONDITION
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return six.text_type(self._get_ec2_signed_url(signal_type=wc))
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else:
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return six.text_type(self.name)
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def metadata_update(self, new_metadata=None):
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"""DEPRECATED. Should use handle_signal instead."""
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self.handle_signal(details=new_metadata)
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def handle_signal(self, details=None):
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'''
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Validate and update the resource metadata
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metadata must use the following format:
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{
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"Status" : "Status (must be SUCCESS or FAILURE)",
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"UniqueId" : "Some ID, should be unique for Count>1",
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"Data" : "Arbitrary Data",
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"Reason" : "Reason String"
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}
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'''
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if details is None:
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return
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return super(WaitConditionHandle, self).handle_signal(details)
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def resource_mapping():
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return {
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'AWS::CloudFormation::WaitConditionHandle': WaitConditionHandle,
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}
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