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OpenStack Study: limits.py**** CubicPower OpenStack Study ****
# Copyright 2010-2011 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. import datetime from nova.openstack.common import timeutils
**** CubicPower OpenStack Study **** class ViewBuilder(object): """OpenStack API base limits view builder."""
**** CubicPower OpenStack Study **** def build(self, rate_limits, absolute_limits): rate_limits = self._build_rate_limits(rate_limits) absolute_limits = self._build_absolute_limits(absolute_limits) output = { "limits": { "rate": rate_limits, "absolute": absolute_limits, }, } return output
**** CubicPower OpenStack Study **** def _build_absolute_limits(self, absolute_limits): """Builder for absolute limits absolute_limits should be given as a dict of limits. For example: {"ram": 512, "gigabytes": 1024}. """ limit_names = { "ram": ["maxTotalRAMSize"], "instances": ["maxTotalInstances"], "cores": ["maxTotalCores"], "key_pairs": ["maxTotalKeypairs"], "floating_ips": ["maxTotalFloatingIps"], "metadata_items": ["maxServerMeta", "maxImageMeta"], "injected_files": ["maxPersonality"], "injected_file_content_bytes": ["maxPersonalitySize"], "security_groups": ["maxSecurityGroups"], "security_group_rules": ["maxSecurityGroupRules"], } limits = {} for name, value in absolute_limits.iteritems(): if name in limit_names and value is not None: for name in limit_names[name]: limits[name] = value return limits
**** CubicPower OpenStack Study **** def _build_rate_limits(self, rate_limits): limits = [] for rate_limit in rate_limits: _rate_limit_key = None _rate_limit = self._build_rate_limit(rate_limit) # check for existing key for limit in limits: if (limit["uri"] == rate_limit["URI"] and limit["regex"] == rate_limit["regex"]): _rate_limit_key = limit break # ensure we have a key if we didn't find one if not _rate_limit_key: _rate_limit_key = { "uri": rate_limit["URI"], "regex": rate_limit["regex"], "limit": [], } limits.append(_rate_limit_key) _rate_limit_key["limit"].append(_rate_limit) return limits
**** CubicPower OpenStack Study **** def _build_rate_limit(self, rate_limit): _get_utc = datetime.datetime.utcfromtimestamp next_avail = _get_utc(rate_limit["resetTime"]) return { "verb": rate_limit["verb"], "value": rate_limit["value"], "remaining": int(rate_limit["remaining"]), "unit": rate_limit["unit"], "next-available": timeutils.isotime(at=next_avail), }
**** CubicPower OpenStack Study **** class ViewBuilderV3(ViewBuilder):
**** CubicPower OpenStack Study **** def build(self, rate_limits): rate_limits = self._build_rate_limits(rate_limits) return {"limits": {"rate": rate_limits}}
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