58 lines
2.1 KiB
Python
58 lines
2.1 KiB
Python
# Copyright 2016 Mirantis, Inc.
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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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from nailgun import utils
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from nailgun.utils.uniondict import UnionDict
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class TransactionContext(object):
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def __init__(self, new_state, old_state=None, **kwargs):
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"""Wrapper around current and previous state of a transaction
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:param new_state: new state of cluster
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{node_id: <deployment info>, ...}
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:param old_state: old state of cluster per task name or None
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{task_id: {node_id: <deployment info>, ...}, ...}
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"""
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self.new = new_state
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self.old = old_state or {}
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self.options = kwargs
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def get_new_data(self, node_id):
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return UnionDict(self.new['common'],
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self.new['nodes'][node_id])
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def get_old_data(self, node_id, task_id):
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node_info = utils.get_in(self.old, task_id, 'nodes', node_id)
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if not node_info:
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return {}
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return UnionDict(self.old[task_id]['common'], node_info)
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def get_new_node_data(self, node_id):
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"""Return part of transaction context, related to node.
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This part of the context contain only small amount of
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node attributes.
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"""
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return self.new['nodes'][node_id]
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def get_new_common_data(self):
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"""Return common part of transaction context.
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This part of context doesn't contain any attributes,
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related to selected node and it's the same for all
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nodes in the cluster.
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"""
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return self.new['common']
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