117 lines
4.8 KiB
Python
117 lines
4.8 KiB
Python
import datetime
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from sqlalchemy import Column, VARCHAR, CHAR, ForeignKey, DATETIME, UniqueConstraint, update, and_, delete, inspect
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy.engine import Engine
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from sqlalchemy.orm import sessionmaker
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Base = declarative_base()
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class Origin(Base):
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__tablename__ = "origin"
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origin_ref = Column(CHAR(length=36), primary_key=True, unique=True, index=True) # uuid4
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hostname = Column(VARCHAR(length=256), nullable=True)
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guest_driver_version = Column(VARCHAR(length=10), nullable=True)
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os_platform = Column(VARCHAR(length=256), nullable=True)
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os_version = Column(VARCHAR(length=256), nullable=True)
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def __repr__(self):
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return f'Origin(origin_ref={self.origin_ref}, hostname={self.hostname})'
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@staticmethod
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def create_statement(engine: Engine):
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from sqlalchemy.schema import CreateTable
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return CreateTable(Origin.__table__).compile(engine)
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@staticmethod
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def create_or_update(engine: Engine, origin: "Origin"):
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session = sessionmaker(autocommit=True, autoflush=True, bind=engine)()
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entity = session.query(Origin).filter(Origin.origin_ref == origin.origin_ref).first()
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print(entity)
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if entity is None:
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session.add(origin)
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else:
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values = dict(
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hostname=origin.hostname,
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guest_driver_version=origin.guest_driver_version,
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os_platform=origin.os_platform,
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os_version=origin.os_version,
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)
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session.execute(update(Origin).where(Origin.origin_ref == origin.origin_ref).values(**values))
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session.flush()
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session.close()
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class Lease(Base):
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__tablename__ = "lease"
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origin_ref = Column(CHAR(length=36), ForeignKey(Origin.origin_ref), primary_key=True, nullable=False, index=True) # uuid4
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lease_ref = Column(CHAR(length=36), primary_key=True, nullable=False, index=True) # uuid4
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lease_created = Column(DATETIME(), nullable=False)
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lease_expires = Column(DATETIME(), nullable=False)
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lease_updated = Column(DATETIME(), nullable=False)
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def __repr__(self):
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return f'Lease(origin_ref={self.origin_ref}, lease_ref={self.lease_ref}, expires={self.lease_expires})'
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@staticmethod
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def create_statement(engine: Engine):
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from sqlalchemy.schema import CreateTable
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return CreateTable(Lease.__table__).compile(engine)
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@staticmethod
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def create_or_update(engine: Engine, lease: "Lease"):
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session = sessionmaker(autocommit=True, autoflush=True, bind=engine)()
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entity = session.query(Lease).filter(and_(Lease.origin_ref == lease.origin_ref, Lease.lease_ref == lease.lease_ref)).first()
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if entity is None:
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if lease.lease_updated is None:
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lease.lease_updated = lease.lease_created
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session.add(lease)
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else:
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values = dict(lease_expires=lease.lease_expires, lease_updated=lease.lease_updated)
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session.execute(update(Lease).where(and_(Lease.origin_ref == lease.origin_ref, Lease.lease_ref == lease.lease_ref)).values(**values))
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session.flush()
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session.close()
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@staticmethod
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def find_by_origin_ref(engine: Engine, origin_ref: str) -> ["Lease"]:
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session = sessionmaker(autocommit=True, autoflush=True, bind=engine)()
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entities = session.query(Lease).filter(Lease.origin_ref == origin_ref).all()
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session.close()
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return entities
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@staticmethod
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def find_by_origin_ref_and_lease_ref(engine: Engine, origin_ref: str, lease_ref: str) -> "Lease":
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session = sessionmaker(autocommit=True, autoflush=True, bind=engine)()
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entity = session.query(Lease).filter(and_(Lease.origin_ref == origin_ref, Lease.lease_ref == lease_ref)).first()
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session.close()
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return entity
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@staticmethod
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def renew(engine: Engine, lease: "Lease", lease_expires: datetime.datetime, lease_updated: datetime.datetime):
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session = sessionmaker(autocommit=True, autoflush=True, bind=engine)()
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values = dict(lease_expires=lease.lease_expires, lease_updated=lease.lease_updated)
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session.execute(update(Lease).where(and_(Lease.origin_ref == lease.origin_ref, Lease.lease_ref == lease.lease_ref)).values(**values))
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session.close()
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@staticmethod
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def cleanup(engine: Engine, origin_ref: str) -> int:
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session = sessionmaker(autocommit=True, autoflush=True, bind=engine)()
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deletions = session.query(Lease).filter(Lease.origin_ref == origin_ref).delete()
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session.close()
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return deletions
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def init(engine: Engine):
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tables = [Origin, Lease]
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db = inspect(engine)
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session = sessionmaker(bind=engine)()
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for table in tables:
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if not db.dialect.has_table(engine.connect(), table.__tablename__):
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session.execute(str(table.create_statement(engine)))
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session.close()
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