mirror of
https://github.com/moparisthebest/SickRage
synced 2024-08-13 16:53:54 -04:00
74 lines
2.2 KiB
Python
74 lines
2.2 KiB
Python
# -*- coding: utf-8 -*-
|
|
'''
|
|
Database object store.
|
|
|
|
The shove psuedo-URL used for database object stores is the format used by
|
|
SQLAlchemy:
|
|
|
|
<driver>://<username>:<password>@<host>:<port>/<database>
|
|
|
|
<driver> is the database engine. The engines currently supported SQLAlchemy are
|
|
sqlite, mysql, postgres, oracle, mssql, and firebird.
|
|
<username> is the database account user name
|
|
<password> is the database accound password
|
|
<host> is the database location
|
|
<port> is the database port
|
|
<database> is the name of the specific database
|
|
|
|
For more information on specific databases see:
|
|
|
|
http://www.sqlalchemy.org/docs/dbengine.myt#dbengine_supported
|
|
'''
|
|
|
|
try:
|
|
from sqlalchemy import MetaData, Table, Column, String, Binary, select
|
|
from shove import BaseStore, DbBase
|
|
except ImportError, e:
|
|
raise ImportError('Requires SQLAlchemy >= 0.4')
|
|
|
|
|
|
class DbStore(BaseStore, DbBase):
|
|
|
|
'''Database cache backend.'''
|
|
|
|
def __init__(self, engine, **kw):
|
|
super(DbStore, self).__init__(engine, **kw)
|
|
# Get tablename
|
|
tablename = kw.get('tablename', 'store')
|
|
# Bind metadata
|
|
self._metadata = MetaData(engine)
|
|
# Make store table
|
|
self._store = Table(tablename, self._metadata,
|
|
Column('key', String(255), primary_key=True, nullable=False),
|
|
Column('value', Binary, nullable=False),
|
|
)
|
|
# Create store table if it does not exist
|
|
if not self._store.exists():
|
|
self._store.create()
|
|
|
|
def __getitem__(self, key):
|
|
row = select(
|
|
[self._store.c.value], self._store.c.key == key,
|
|
).execute().fetchone()
|
|
if row is not None:
|
|
return self.loads(str(row.value))
|
|
raise KeyError(key)
|
|
|
|
def __setitem__(self, k, v):
|
|
v, store = self.dumps(v), self._store
|
|
# Update database if key already present
|
|
if k in self:
|
|
store.update(store.c.key == k).execute(value=v)
|
|
# Insert new key if key not present
|
|
else:
|
|
store.insert().execute(key=k, value=v)
|
|
|
|
def keys(self):
|
|
'''Returns a list of keys in the store.'''
|
|
return list(i[0] for i in select(
|
|
[self._store.c.key]
|
|
).execute().fetchall())
|
|
|
|
|
|
__all__ = ['DbStore']
|