151 lines
4.8 KiB
Python
151 lines
4.8 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 oslo_log import log as logging
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from oslo_serialization import jsonutils
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from oslo_utils import timeutils
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import six
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from heat.common.i18n import _
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from heat.common.i18n import _LI
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from heat.engine import attributes
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from heat.engine import constraints
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from heat.engine import properties
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from heat.engine import resource
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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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LOG = logging.getLogger(__name__)
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class HeatWaitCondition(resource.Resource):
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support_status = support.SupportStatus(version='2014.2')
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PROPERTIES = (
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HANDLE, TIMEOUT, COUNT,
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) = (
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'handle', 'timeout', 'count',
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)
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ATTRIBUTES = (
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DATA,
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) = (
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'data',
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)
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properties_schema = {
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HANDLE: properties.Schema(
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properties.Schema.STRING,
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_('A reference to the wait condition handle used to signal this '
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'wait condition.'),
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required=True
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),
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TIMEOUT: properties.Schema(
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properties.Schema.NUMBER,
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_('The number of seconds to wait for the correct number of '
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'signals to arrive.'),
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required=True,
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constraints=[
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constraints.Range(1, 43200),
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]
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),
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COUNT: properties.Schema(
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properties.Schema.INTEGER,
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_('The number of success signals that must be received before '
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'the stack creation process continues.'),
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constraints=[
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constraints.Range(min=1),
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],
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default=1,
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update_allowed=True
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),
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}
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attributes_schema = {
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DATA: attributes.Schema(
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_('JSON serialized dict containing data associated with wait '
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'condition signals sent to the handle.'),
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cache_mode=attributes.Schema.CACHE_NONE
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),
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}
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def __init__(self, name, definition, stack):
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super(HeatWaitCondition, self).__init__(name, definition, stack)
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def _get_handle_resource(self):
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return self.stack.resource_by_refid(self.properties[self.HANDLE])
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def _wait(self, handle, started_at, timeout_in):
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if timeutils.is_older_than(started_at, timeout_in):
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exc = wc_base.WaitConditionTimeout(self, handle)
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LOG.info(_LI('%(name)s Timed out (%(timeout)s)'),
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{'name': str(self), 'timeout': str(exc)})
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raise exc
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handle_status = handle.get_status()
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if any(s != handle.STATUS_SUCCESS for s in handle_status):
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failure = wc_base.WaitConditionFailure(self, handle)
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LOG.info(_LI('%(name)s Failed (%(failure)s)'),
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{'name': str(self), 'failure': str(failure)})
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raise failure
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if len(handle_status) >= self.properties[self.COUNT]:
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LOG.info(_LI("%s Succeeded"), str(self))
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return True
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return False
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def handle_create(self):
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handle = self._get_handle_resource()
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started_at = timeutils.utcnow()
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return handle, started_at, float(self.properties[self.TIMEOUT])
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def check_create_complete(self, data):
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return self._wait(*data)
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def handle_update(self, json_snippet, tmpl_diff, prop_diff):
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if prop_diff:
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self.properties = json_snippet.properties(self.properties_schema,
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self.context)
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handle = self._get_handle_resource()
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started_at = timeutils.utcnow()
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return handle, started_at, float(self.properties[self.TIMEOUT])
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def check_update_complete(self, data):
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return self._wait(*data)
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def handle_delete(self):
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handle = self._get_handle_resource()
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if handle:
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handle.metadata_set({})
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def _resolve_attribute(self, key):
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handle = self._get_handle_resource()
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if key == self.DATA:
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meta = handle.metadata_get(refresh=True)
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res = {k: meta[k][handle.DATA] for k in meta}
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LOG.debug('%(name)s.GetAtt(%(key)s) == %(res)s'
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% {'name': self.name,
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'key': key,
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'res': res})
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return six.text_type(jsonutils.dumps(res))
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def resource_mapping():
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return {
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'OS::Heat::WaitCondition': HeatWaitCondition,
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}
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