mirror of
https://github.com/moparisthebest/SickRage
synced 2024-11-17 23:05:11 -05:00
73 lines
2.1 KiB
Python
73 lines
2.1 KiB
Python
# -*- coding: utf-8 -*-
|
|
'''
|
|
Cassandra-based object store
|
|
|
|
The shove psuedo-URL for a cassandra-based store is:
|
|
|
|
cassandra://<host>:<port>/<keyspace>/<columnFamily>
|
|
'''
|
|
|
|
import urlparse
|
|
|
|
try:
|
|
import pycassa
|
|
except ImportError:
|
|
raise ImportError('This store requires the pycassa library')
|
|
|
|
from shove import BaseStore
|
|
|
|
|
|
class CassandraStore(BaseStore):
|
|
|
|
'''Cassandra based store'''
|
|
|
|
init = 'cassandra://'
|
|
|
|
def __init__(self, engine, **kw):
|
|
super(CassandraStore, self).__init__(engine, **kw)
|
|
spliturl = urlparse.urlsplit(engine)
|
|
_, keyspace, column_family = spliturl[2].split('/')
|
|
try:
|
|
self._pool = pycassa.connect(keyspace, [spliturl[1]])
|
|
self._store = pycassa.ColumnFamily(self._pool, column_family)
|
|
except pycassa.InvalidRequestException:
|
|
from pycassa.system_manager import SystemManager
|
|
system_manager = SystemManager(spliturl[1])
|
|
system_manager.create_keyspace(
|
|
keyspace,
|
|
pycassa.system_manager.SIMPLE_STRATEGY,
|
|
{'replication_factor': str(kw.get('replication', 1))}
|
|
)
|
|
system_manager.create_column_family(keyspace, column_family)
|
|
self._pool = pycassa.connect(keyspace, [spliturl[1]])
|
|
self._store = pycassa.ColumnFamily(self._pool, column_family)
|
|
|
|
def __getitem__(self, key):
|
|
try:
|
|
item = self._store.get(key).get(key)
|
|
if item is not None:
|
|
return self.loads(item)
|
|
raise KeyError(key)
|
|
except pycassa.NotFoundException:
|
|
raise KeyError(key)
|
|
|
|
def __setitem__(self, key, value):
|
|
self._store.insert(key, dict(key=self.dumps(value)))
|
|
|
|
def __delitem__(self, key):
|
|
# beware eventual consistency
|
|
try:
|
|
self._store.remove(key)
|
|
except pycassa.NotFoundException:
|
|
raise KeyError(key)
|
|
|
|
def clear(self):
|
|
# beware eventual consistency
|
|
self._store.truncate()
|
|
|
|
def keys(self):
|
|
return list(i[0] for i in self._store.get_range())
|
|
|
|
|
|
__all__ = ['CassandraStore']
|