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OpenStack Study: all_hosts_filter.py

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# Copyright (c) 2011-2012 OpenStack Foundation

# All Rights Reserved.

#

# Licensed under the Apache License, Version 2.0 (the "License"); you may

# not use this file except in compliance with the License. You may obtain

# a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT

# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the

# License for the specific language governing permissions and limitations

# under the License.

from nova.scheduler import filters

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class AllHostsFilter(filters.BaseHostFilter):

"""NOOP host filter. Returns all hosts."""

# list of hosts doesn't change within a request

run_filter_once_per_request = True

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    def host_passes(self, host_state, filter_properties):

        return True