101 lines
3.8 KiB
Python
101 lines
3.8 KiB
Python
# 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 nova.db import api as db
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from nova.objects import base
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from nova.objects import fields
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@base.NovaObjectRegistry.register
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class VolumeUsage(base.NovaPersistentObject, base.NovaObject):
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# Version 1.0: Initial version
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VERSION = '1.0'
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fields = {
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'id': fields.IntegerField(read_only=True),
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'volume_id': fields.UUIDField(),
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'instance_uuid': fields.UUIDField(nullable=True),
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'project_id': fields.StringField(nullable=True),
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'user_id': fields.StringField(nullable=True),
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'availability_zone': fields.StringField(nullable=True),
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'tot_last_refreshed': fields.DateTimeField(nullable=True,
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read_only=True),
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'tot_reads': fields.IntegerField(read_only=True),
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'tot_read_bytes': fields.IntegerField(read_only=True),
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'tot_writes': fields.IntegerField(read_only=True),
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'tot_write_bytes': fields.IntegerField(read_only=True),
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'curr_last_refreshed': fields.DateTimeField(nullable=True,
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read_only=True),
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'curr_reads': fields.IntegerField(),
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'curr_read_bytes': fields.IntegerField(),
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'curr_writes': fields.IntegerField(),
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'curr_write_bytes': fields.IntegerField()
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}
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@property
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def last_refreshed(self):
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if self.tot_last_refreshed and self.curr_last_refreshed:
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return max(self.tot_last_refreshed, self.curr_last_refreshed)
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elif self.tot_last_refreshed:
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return self.tot_last_refreshed
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else:
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# curr_last_refreshed must be set
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return self.curr_last_refreshed
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@property
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def reads(self):
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return self.tot_reads + self.curr_reads
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@property
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def read_bytes(self):
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return self.tot_read_bytes + self.curr_read_bytes
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@property
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def writes(self):
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return self.tot_writes + self.curr_writes
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@property
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def write_bytes(self):
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return self.tot_write_bytes + self.curr_write_bytes
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@staticmethod
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def _from_db_object(context, vol_usage, db_vol_usage):
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for field in vol_usage.fields:
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setattr(vol_usage, field, db_vol_usage[field])
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vol_usage._context = context
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vol_usage.obj_reset_changes()
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return vol_usage
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@base.remotable
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def save(self, update_totals=False):
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db_vol_usage = db.vol_usage_update(
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self._context, self.volume_id, self.curr_reads,
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self.curr_read_bytes, self.curr_writes, self.curr_write_bytes,
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self.instance_uuid, self.project_id, self.user_id,
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self.availability_zone, update_totals=update_totals)
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self._from_db_object(self._context, self, db_vol_usage)
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def to_dict(self):
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return {
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'volume_id': self.volume_id,
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'tenant_id': self.project_id,
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'user_id': self.user_id,
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'availability_zone': self.availability_zone,
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'instance_id': self.instance_uuid,
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'last_refreshed': str(
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self.last_refreshed) if self.last_refreshed else '',
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'reads': self.reads,
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'read_bytes': self.read_bytes,
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'writes': self.writes,
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'write_bytes': self.write_bytes
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}
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