/
storage.py
269 lines (211 loc) · 10.5 KB
/
storage.py
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import sys
if sys.version_info < (3, 6):
raise ImportError("Can't use AsyncMinHashLSH module. Python version should be >=3.6")
import os
import asyncio
from itertools import chain
from datasketch.storage import UnorderedStorage, OrderedStorage, _random_name
from abc import ABCMeta
ABC = ABCMeta('ABC', (object,), {})
try:
import motor.motor_asyncio
from pymongo import ReturnDocument
except ImportError:
motor = None
ReturnDocument = None
async def async_ordered_storage(config, name=None):
tp = config['type']
if tp == 'aiomongo':
if motor is None:
raise RuntimeError('motor is not installed')
return AsyncMongoListStorage(config, name=name)
raise ValueError('Unknown config ["type"]')
async def async_unordered_storage(config, name=None):
tp = config['type']
if tp == 'aiomongo':
if motor is None:
raise RuntimeError('motor is not installed')
return AsyncMongoSetStorage(config, name=name)
raise ValueError('Unknown config ["type"]')
if motor is not None and ReturnDocument is not None:
class AsyncMongoBuffer:
def __init__(self, aio_mongo_collection, batch_size):
self._batch_size = batch_size
self._insert_documents_stack = tuple()
self._delete_by_key_documents_stack = tuple()
self._delete_by_val_documents_stack = tuple()
self._mongo_coll = aio_mongo_collection
@property
def batch_size(self):
return self._batch_size
@batch_size.setter
def batch_size(self, value):
self._batch_size = value
async def execute_command(self, **kwargs):
command = kwargs.pop('command')
if command == 'insert':
if len(self._insert_documents_stack) >= self.batch_size:
await self.execute(command)
self._insert_documents_stack += (kwargs['obj'],)
elif command == 'delete_by_key':
if len(self._delete_by_key_documents_stack) >= self.batch_size:
await self.execute(command)
self._delete_by_key_documents_stack += (kwargs['key'],)
elif command == 'delete_by_val':
if len(self._delete_by_val_documents_stack) >= self.batch_size:
await self.execute(command)
self._delete_by_val_documents_stack += (kwargs['val'],)
async def execute(self, command):
if command == 'insert' and self._insert_documents_stack:
buffer = self._insert_documents_stack
self._insert_documents_stack = tuple()
await self._mongo_coll.insert_many(buffer, ordered=False)
elif command == 'delete_by_key' and self._delete_by_key_documents_stack:
buffer = self._delete_by_key_documents_stack
self._delete_by_key_documents_stack = tuple()
await self._mongo_coll.delete_many({'key': {'$in': buffer}})
elif command == 'delete_by_val' and self._delete_by_val_documents_stack:
buffer = self._delete_by_val_documents_stack
self._delete_by_val_documents_stack = tuple()
await self._mongo_coll.delete_many({'vals': {'$in': buffer}})
async def insert_one(self, **kwargs):
await self.execute_command(obj=kwargs['document'], command='insert')
async def delete_many_by_key(self, **kwargs):
await self.execute_command(key=kwargs['key'], command='delete_by_key')
async def delete_many_by_val(self, **kwargs):
await self.execute_command(val=kwargs['val'], command='delete_by_val')
class AsyncMongoStorage(object):
"""Base class for asynchronous MongoDB-based storage containers.
:param dict config: MongoDB storage units require a configuration
of the form::
storage_config={
'type': 'aiomongo',
'mongo': {'host': 'localhost', 'port': 27017}
}
one can refer to system environment variables via::
storage_config={
'type': 'aiomongo',
'mongo': {
'host': {'env': 'MONGO_HOSTNAME',
'default':'localhost'},
'port': 27017}
}
}
:param bytes name: see :class:`datasketch.storage.RedisStorage` (default = None).
"""
def __init__(self, config, name=None):
assert config['type'] == 'aiomongo', 'Storage type <{}> not supported'.format(config['type'])
self._config = config
self._mongo_param = self._parse_config(self._config['mongo'])
self._name = name if name else _random_name(11).decode('utf-8')
if 'collection_name' in self.mongo_param:
self._collection_name = self.mongo_param['collection_name']
elif 'collection_prefix' in self.mongo_param:
self._collection_name = self.mongo_param['collection_prefix'] + self._name
else:
self._collection_name = 'lsh_' + self._name
db_lsh = self.mongo_param['db'] if 'db' in self.mongo_param else 'db_0'
if 'url' in self.mongo_param:
dsn = self.mongo_param['url']
elif 'replica_set' in self.mongo_param:
dsn = 'mongodb://{replica_set_nodes}/?replicaSet={replica_set}'.format(**self.mongo_param)
elif 'username' in self.mongo_param or 'password' in self.mongo_param:
dsn = 'mongodb://{username}:{password}@{host}:{port}'.format(**self.mongo_param)
else:
dsn = 'mongodb://{host}:{port}'.format(**self.mongo_param)
additional_args = self.mongo_param.get('args', {})
self._batch_size = 1000
self._mongo_client = motor.motor_asyncio.AsyncIOMotorClient(dsn, **additional_args)
self._collection = self._mongo_client.get_default_database(db_lsh).get_collection(self._collection_name)
self._initialized = True
self._buffer = AsyncMongoBuffer(self._collection, self._batch_size)
async def close(self):
fs = (self._buffer.execute(command) for command in ('insert', 'delete_by_key', 'delete_by_val'))
await asyncio.gather(*fs)
self._mongo_client.close()
@property
def batch_size(self):
return self._batch_size
@batch_size.setter
def batch_size(self, value):
self._batch_size = value
self._buffer.batch_size = value
@property
def initialized(self):
return self._initialized
@property
def mongo_param(self):
return self._mongo_param
@staticmethod
def _parse_config(config):
cfg = {}
for key, value in config.items():
if isinstance(value, dict):
if 'env' in value:
value = os.getenv(value['env'], value.get('default', None))
cfg[key] = value
return cfg
def __getstate__(self):
state = self.__dict__.copy()
state.pop('_mongo_client')
state.pop('_collection')
state.pop('_buffer')
state['_initialized'] = False
return state
def __setstate__(self, state):
self.__dict__ = state
self.__init__(self._config, name=self._name)
class AsyncMongoListStorage(OrderedStorage, AsyncMongoStorage):
async def keys(self):
return [doc['key'] async for doc in self._collection.find(projection={'_id': False, 'vals': False})]
async def get(self, key: str):
return list(chain.from_iterable([doc['vals'] async for doc in self._collection.find(filter={'key': key},
projection={
'_id': False,
'key': False})]))
async def insert(self, key, *vals, **kwargs):
buffer = kwargs.pop('buffer', False)
if buffer:
await self._insert(self._buffer, key, *vals)
else:
await self._insert(self._collection, key, *vals)
async def _insert(self, obj, key, *values):
await obj.insert_one(document={'key': key, 'vals': values})
async def remove(self, *keys, **kwargs):
buffer = kwargs.pop('buffer', False)
if buffer:
fs = (self._buffer.delete_many_by_key(key=key) for key in keys)
await asyncio.gather(*fs)
else:
await self._collection.delete_many({'key': {'$in': keys}})
async def remove_val(self, key, val, **kwargs):
pass
async def size(self):
return await self._collection.count_documents({})
async def itemcounts(self):
return {doc['_id']: doc['count'] async for doc in
self._collection.aggregate([{'$group': {'_id': '$key', 'count': {'$sum': 1}}}])}
async def has_key(self, key):
return True if await self._collection.find_one({'key': key}) else False
async def status(self):
status = self._parse_config(self.config['mongo'])
status.update({'keyspace_size': await self.size()})
return status
async def empty_buffer(self):
fs = (self._buffer.execute(command) for command in ('insert', 'delete_by_key', 'delete_by_val'))
await asyncio.gather(*fs)
class AsyncMongoSetStorage(UnorderedStorage, AsyncMongoListStorage):
async def get(self, key):
keys = [doc['vals'] async for doc in self._collection.find(filter={'key': key},
projection={'_id': False, 'key': False})]
return frozenset(keys)
async def _insert(self, obj, key, *values):
await obj.insert_one(document={'key': key, 'vals': values[0]})
async def remove(self, *keys, **kwargs):
pass
async def remove_val(self, key, val, **kwargs):
buffer = kwargs.pop('buffer', False)
if buffer:
await self._buffer.delete_many_by_val(val=val)
else:
await self._collection.find_one_and_delete({'key': key, 'vals': val})