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# coding=utf-8 # # Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2023 All Rights Reserved # # Licensed under CLOUD LINUX LICENSE AGREEMENT # http://cloudlinux.com/docs/LICENSE.TXT # pylint: disable=abstract-method import enum from enum import IntEnum import sqlalchemy as sa from lvestats.orm.base import Base from lvestats.orm.const import LVE_STATS_2_TABLENAME_PREFIX, SERVER_ID_LENGTH class _EnumAsInteger(sa.types.TypeDecorator): # NOTE(vlebedev): Taken as-is from https://stackoverflow.com/a/38786737/3344105 """Column type for storing Python enums in a database INTEGER column. This will behave erratically if a database value does not correspond to a known enum value. """ impl = sa.types.SmallInteger # underlying database type def __init__(self, enum_type): super().__init__() self.enum_type = enum_type def process_bind_param(self, value, dialect): if isinstance(value, self.enum_type): return value.value raise ValueError( f'expected {self.enum_type.__name__} value, got {value.__class__.__name__}' ) def process_result_value(self, value, dialect): return self.enum_type(value) def copy(self, **kwargs): return _EnumAsInteger(self.enum_type) @enum.unique class BurstingEventType(IntEnum): STOPPED = 0 STARTED = 1 bursting_events_table = sa.Table( LVE_STATS_2_TABLENAME_PREFIX + 'bursting_events', Base.metadata, # 'server_id' is essential for proper functionality # when used with a central database for multiple servers sa.Column('server_id', sa.String(SERVER_ID_LENGTH), primary_key=True), sa.Column('lve_id', sa.BigInteger, primary_key=True), sa.Column( 'timestamp', sa.Integer, primary_key=True, index=True, comment='UNIX timestamp of the event (seconds precision)' ), sa.Column('event_type', _EnumAsInteger(BurstingEventType), nullable=False), )
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