42 lines
1.5 KiB
Python
42 lines
1.5 KiB
Python
# Copyright 2011 Quanta Research Cambridge, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""A class to store the state of various persistent objects in the Nova
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cluster, e.g. instances, volumes. Use methods to query to state which than
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can be compared to the current state of the objects in Nova"""
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class State(object):
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def __init__(self, **kwargs):
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self._max_vms = kwargs.get('max_vms', 32)
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self._instances = {}
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self._volumes = {}
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# machine state methods
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def get_instances(self):
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"""return the instances dictionary that we believe are in cluster."""
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return self._instances
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def get_max_instances(self):
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"""return the maximum number of instances we can create."""
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return self._max_vms
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def set_instance_state(self, key, val):
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"""Store `val` in the dictionary indexed at `key`."""
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self._instances[key] = val
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def delete_instance_state(self, key):
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"""Delete state indexed at `key`."""
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del self._instances[key]
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