122 lines
2.5 KiB
Python
122 lines
2.5 KiB
Python
# standard imports
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import datetime
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# external imports
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import rocksdb
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class RocksDbStore:
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def __init__(self, path, db, binary=False):
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self.db = db
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self.__path = path
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self.__binary = binary
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def __to_key(self, k):
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return k.encode('utf-8')
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def __to_contents(self, v):
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if isinstance(v, bytes):
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return v
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return v.encode('utf-8')
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def __to_path(self, k):
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return '.'.join([self.__path, k])
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def __from_path(self, s):
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(left, right) = s.split('.', maxsplit=1)
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return right
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def __to_result(self, v):
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if self.__binary:
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return v
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return v.decode('utf-8')
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def add(self, k, contents=b''):
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if contents == None:
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contents = b''
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else:
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contents = self.__to_contents(contents)
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k = self.__to_path(k)
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k = self.__to_key(k)
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self.db.put(k, contents)
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def remove(self, k):
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k = self.__to_path(k)
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k = self.__to_key(k)
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self.db.delete(k)
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def get(self, k):
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k = self.__to_path(k)
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k = self.__to_key(k)
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v = self.db.get(k)
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return self.__to_result(v)
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def list(self):
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it = self.db.iteritems()
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kb_start = self.__to_key(self.__path)
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it.seek(kb_start)
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r = []
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l = len(self.__path)
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for (k, v) in it:
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if len(k) < l or k[:l] != self.__path:
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break
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k = self.__from_path(s)
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kb = self.__to_key(k)
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v = self.db.get(kb)
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r.append((k, v,))
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return r
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def path(self):
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return None
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def replace(self, k, contents):
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if contents == None:
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contents = b''
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else:
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contents = self.__to_contents(contents)
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k = self.__to_path(k)
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k = self.__to_key(k)
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v = self.db.get(k)
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if v == None:
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raise FileNotFoundError(k)
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self.db.put(k, contents)
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def modified(self, k):
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k = self.__to_path(k)
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k = '_mod' + k
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v = self.db.get(k)
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return int(v)
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def register_modify(self, k):
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k = self.__to_path(k)
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k = '_mod' + k
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ts = datetime.datetime.utcnow().timestamp()
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self.db.set(k)
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class RocksDbStoreFactory:
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def __init__(self, path, binary=False):
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self.db = rocksdb.DB(path, rocksdb.Options(create_if_missing=True))
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self.__binary = binary
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def add(self, k):
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k = str(k)
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return RocksDbStore(k, self.db, binary=self.__binary)
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