126 lines
5.6 KiB
Python
126 lines
5.6 KiB
Python
"""
|
|
Copyright 2016 Platform9 Systems Inc.(http://www.platform9.com)
|
|
|
|
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 sqlalchemy.pool import QueuePool
|
|
from sqlalchemy import create_engine, text
|
|
from sqlalchemy import Table, Column, Integer, String, MetaData, DateTime
|
|
import logging, functools
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
def db_connect(transaction=False):
|
|
"""
|
|
Generates a decorator that get connection from a pool and returns
|
|
it to the pool when the internal function is done
|
|
:param transaction bool: should this function create and end transaction.
|
|
"""
|
|
|
|
def _db_connect(fun):
|
|
if hasattr(fun, '__name__'):
|
|
fun.__name__ = 'method_decorator(%s)' % fun.__name__
|
|
else:
|
|
fun.__name__ = 'method_decorator(%s)' % fun.__class__.__name__
|
|
|
|
@functools.wraps(fun)
|
|
def newfun(self, *args, **kwargs):
|
|
conn = self.engine.connect()
|
|
if transaction:
|
|
trans = conn.begin()
|
|
try:
|
|
ret = fun(self, conn, *args, **kwargs)
|
|
if transaction:
|
|
trans.commit()
|
|
return ret
|
|
except Exception as e:
|
|
if transaction:
|
|
trans.rollback()
|
|
logger.exception("Error during transaction ")
|
|
raise
|
|
finally:
|
|
conn.close()
|
|
|
|
return newfun
|
|
|
|
return _db_connect
|
|
|
|
|
|
class DbPersistence:
|
|
def __init__(self, db_conn_string):
|
|
self.engine = create_engine(db_conn_string, poolclass=QueuePool)
|
|
self.metadata = MetaData(bind=self.engine)
|
|
self.tenant_lease = Table('tenant_lease', self.metadata, autoload=True)
|
|
self.instance_lease = Table('instance_lease', self.metadata, autoload=True)
|
|
|
|
@db_connect(transaction=False)
|
|
def get_all_tenant_leases(self, conn):
|
|
return conn.execute(self.tenant_lease.select()).fetchall()
|
|
|
|
@db_connect(transaction=False)
|
|
def get_tenant_lease(self, conn, tenant_uuid):
|
|
return conn.execute(self.tenant_lease.select(self.tenant_lease.c.tenant_uuid == tenant_uuid)).first()
|
|
|
|
@db_connect(transaction=True)
|
|
def add_tenant_lease(self, conn, tenant_uuid, expiry_mins, created_by, created_at):
|
|
logger.debug("Adding tenant lease %s %d %s %s", tenant_uuid, expiry_mins, str(created_at), created_by)
|
|
conn.execute(self.tenant_lease.insert(), tenant_uuid=tenant_uuid, expiry_mins=expiry_mins,
|
|
created_at=created_at, created_by=created_by)
|
|
|
|
@db_connect(transaction=True)
|
|
def update_tenant_lease(self, conn, tenant_uuid, expiry_mins, updated_by, updated_at):
|
|
logger.debug("Updating tenant lease %s %d %s %s", tenant_uuid, expiry_mins, str(updated_at), updated_by)
|
|
conn.execute(self.tenant_lease.update().\
|
|
where(self.tenant_lease.c.tenant_uuid == tenant_uuid).\
|
|
values(expiry_mins=expiry_mins,
|
|
updated_at=updated_at, updated_by=updated_by))
|
|
|
|
@db_connect(transaction=True)
|
|
def delete_tenant_lease(self, conn, tenant_uuid):
|
|
# Should we just soft delete ?
|
|
logger.debug("Deleting tenant lease %s", tenant_uuid)
|
|
conn.execute(self.tenant_lease.delete().where(tenant_uuid == tenant_uuid))
|
|
conn.execute(self.instance_lease.delete().where(tenant_uuid == tenant_uuid))
|
|
|
|
@db_connect(transaction=False)
|
|
def get_instance_leases_by_tenant(self, conn, tenant_uuid):
|
|
return conn.execute(self.instance_lease.select(\
|
|
self.instance_lease.c.tenant_uuid == tenant_uuid)).fetchall()
|
|
|
|
@db_connect(transaction=False)
|
|
def get_instance_lease(self, conn, instance_uuid):
|
|
return conn.execute(self.instance_lease.select((\
|
|
self.instance_lease.c.instance_uuid == instance_uuid))).first()
|
|
|
|
@db_connect(transaction=True)
|
|
def add_instance_lease(self, conn, instance_uuid, tenant_uuid, expiry, created_by, created_at):
|
|
logger.debug("Adding instance lease %s %s %s %s", instance_uuid, tenant_uuid, expiry, created_by)
|
|
conn.execute(self.instance_lease.insert(), instance_uuid=instance_uuid, tenant_uuid=tenant_uuid,
|
|
expiry=expiry,
|
|
created_at=created_at, created_by=created_by)
|
|
|
|
@db_connect(transaction=True)
|
|
def update_instance_lease(self, conn, instance_uuid, tenant_uuid, expiry, updated_by, updated_at):
|
|
logger.debug("Updating instance lease %s %s %s %s", instance_uuid, tenant_uuid, expiry, updated_by)
|
|
conn.execute(self.instance_lease.update().\
|
|
where(self.instance_lease.c.instance_uuid == instance_uuid).\
|
|
values(tenant_uuid=tenant_uuid, expiry=expiry,
|
|
updated_at=updated_at, updated_by=updated_by))
|
|
|
|
@db_connect(transaction=True)
|
|
def delete_instance_leases(self, conn, instance_uuids):
|
|
# Delete 10 at a time, should we soft delete
|
|
logger.debug("Deleting instance leases %s", str(instance_uuids))
|
|
conn.execute(self.instance_lease.delete().where(self.instance_lease.c.instance_uuid.in_(instance_uuids)))
|