11c1b62052
Since i18n.install() is deprecated, remove it from heat codes and import i18n._() to where it needed. blueprint oslo-i18n Change-Id: Icefada18b5a33112b425cd90d31d3a6a5f06188a
121 lines
4.4 KiB
Python
121 lines
4.4 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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from requests import exceptions
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from heat.common import exception
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from heat.common.i18n import _
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from heat.common import template_format
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from heat.common import urlfetch
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from heat.engine import attributes
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from heat.engine import properties
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from heat.engine import stack_resource
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class NestedStack(stack_resource.StackResource):
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'''
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A Resource representing a child stack to allow composition of templates.
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'''
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PROPERTIES = (
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TEMPLATE_URL, TIMEOUT_IN_MINS, PARAMETERS,
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) = (
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'TemplateURL', 'TimeoutInMinutes', 'Parameters',
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)
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properties_schema = {
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TEMPLATE_URL: properties.Schema(
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properties.Schema.STRING,
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_('The URL of a template that specifies the stack to be created '
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'as a resource.'),
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required=True,
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update_allowed=True
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),
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TIMEOUT_IN_MINS: properties.Schema(
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properties.Schema.NUMBER,
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_('The length of time, in minutes, to wait for the nested stack '
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'creation.'),
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update_allowed=True
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),
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PARAMETERS: properties.Schema(
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properties.Schema.MAP,
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_('The set of parameters passed to this nested stack.'),
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update_allowed=True
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),
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}
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def child_template(self):
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try:
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template_data = urlfetch.get(self.properties[self.TEMPLATE_URL])
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except (exceptions.RequestException, IOError) as r_exc:
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raise ValueError(_("Could not fetch remote template '%(url)s': "
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"%(exc)s") %
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{'url': self.properties[self.TEMPLATE_URL],
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'exc': str(r_exc)})
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return template_format.parse(template_data)
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def child_params(self):
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return self.properties[self.PARAMETERS]
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def handle_adopt(self, resource_data=None):
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return self._create_with_template(resource_adopt_data=resource_data)
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def handle_create(self):
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return self._create_with_template()
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def _create_with_template(self, resource_adopt_data=None):
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template = self.child_template()
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return self.create_with_template(template,
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self.child_params(),
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self.properties[self.TIMEOUT_IN_MINS],
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adopt_data=resource_adopt_data)
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def handle_delete(self):
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return self.delete_nested()
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def FnGetAtt(self, key, *path):
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if key and not key.startswith('Outputs.'):
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raise exception.InvalidTemplateAttribute(resource=self.name,
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key=key)
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attribute = self.get_output(key.partition('.')[-1])
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return attributes.select_from_attribute(attribute, path)
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def FnGetRefId(self):
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return self.nested().identifier().arn()
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def handle_update(self, json_snippet, tmpl_diff, prop_diff):
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# Nested stack template may be changed even if the prop_diff is empty.
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self.properties = json_snippet.properties(self.properties_schema,
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self.context)
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try:
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template_data = urlfetch.get(self.properties[self.TEMPLATE_URL])
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except (exceptions.RequestException, IOError) as r_exc:
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raise ValueError(_("Could not fetch remote template '%(url)s': "
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"%(exc)s") %
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{'url': self.properties[self.TEMPLATE_URL],
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'exc': str(r_exc)})
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template = template_format.parse(template_data)
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return self.update_with_template(template,
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self.properties[self.PARAMETERS],
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self.properties[self.TIMEOUT_IN_MINS])
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def resource_mapping():
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return {
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'AWS::CloudFormation::Stack': NestedStack,
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}
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