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102 lines
3.4 KiB
102 lines
3.4 KiB
# vim: tabstop=4 shiftwidth=4 softtabstop=4 |
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# |
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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 urllib2 |
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import json |
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import logging |
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from heat.common import exception |
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from heat.engine.resources import Resource |
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from heat.db import api as db_api |
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from heat.engine import parser |
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logger = logging.getLogger(__file__) |
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(PROP_TEMPLATE_URL, |
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PROP_TIMEOUT_MINS, |
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PROP_PARAMETERS) = ('TemplateURL', 'TimeoutInMinutes', 'Parameters') |
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class Stack(Resource): |
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properties_schema = {PROP_TEMPLATE_URL: {'Type': 'String', |
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'Required': True}, |
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PROP_TIMEOUT_MINS: {'Type': 'Number'}, |
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PROP_PARAMETERS: {'Type': 'Map'}} |
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def __init__(self, name, json_snippet, stack): |
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Resource.__init__(self, name, json_snippet, stack) |
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self._nested = None |
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def _params(self): |
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p = self.stack.resolve_runtime_data(self.properties[PROP_PARAMETERS]) |
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return p |
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def nested(self): |
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if self._nested is None and self.instance_id is not None: |
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self._nested = parser.Stack.load(self.stack.context, |
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self.instance_id) |
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if self._nested is None: |
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raise exception.NotFound('Nested stack not found in DB') |
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return self._nested |
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def create_with_template(self, child_template): |
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''' |
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Handle the creation of the nested stack from a given JSON template. |
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''' |
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template = parser.Template(child_template) |
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params = parser.Parameters(self.name, template, self._params()) |
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self._nested = parser.Stack(self.stack.context, |
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self.name, |
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template, |
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params) |
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nested_id = self._nested.store(self.stack) |
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self.instance_id_set(nested_id) |
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self._nested.create() |
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def handle_create(self): |
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response = urllib2.urlopen(self.properties[PROP_TEMPLATE_URL]) |
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template = json.load(response) |
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self.create_with_template(template) |
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def handle_delete(self): |
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try: |
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stack = self.nested() |
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except exception.NotFound: |
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logger.info("Stack not found to delete") |
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else: |
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if stack is not None: |
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stack.delete() |
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def FnGetAtt(self, key): |
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if not key.startswith('Outputs.'): |
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raise exception.InvalidTemplateAttribute(resource=self.name, |
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key=key) |
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prefix, dot, op = key.partition('.') |
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stack = self.nested() |
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if stack is None: |
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# This seems like a hack, to get past validation |
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return '' |
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if op not in stack.outputs: |
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raise exception.InvalidTemplateAttribute(resource=self.name, |
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key=key) |
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return stack.output(op)
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