move batch_iter to a separate module

This commit is contained in:
Richard van der Hoff 2020-01-14 11:58:02 +00:00
parent d386f2f339
commit 14d8f342d5
8 changed files with 41 additions and 23 deletions

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@ -21,7 +21,7 @@ from twisted.internet import defer
from synapse.storage._base import SQLBaseStore
from synapse.storage.engines import PostgresEngine
from synapse.util import batch_iter
from synapse.util.iterutils import batch_iter
logger = logging.getLogger(__name__)

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@ -33,13 +33,13 @@ from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.storage._base import SQLBaseStore, db_to_json, make_in_list_sql_clause
from synapse.storage.database import Database
from synapse.types import get_verify_key_from_cross_signing_key
from synapse.util import batch_iter
from synapse.util.caches.descriptors import (
Cache,
cached,
cachedInlineCallbacks,
cachedList,
)
from synapse.util.iterutils import batch_iter
logger = logging.getLogger(__name__)

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@ -43,9 +43,9 @@ from synapse.storage.data_stores.main.events_worker import EventsWorkerStore
from synapse.storage.data_stores.main.state import StateGroupWorkerStore
from synapse.storage.database import Database
from synapse.types import RoomStreamToken, get_domain_from_id
from synapse.util import batch_iter
from synapse.util.caches.descriptors import cached, cachedInlineCallbacks
from synapse.util.frozenutils import frozendict_json_encoder
from synapse.util.iterutils import batch_iter
logger = logging.getLogger(__name__)

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@ -37,8 +37,8 @@ from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.storage._base import SQLBaseStore, make_in_list_sql_clause
from synapse.storage.database import Database
from synapse.types import get_domain_from_id
from synapse.util import batch_iter
from synapse.util.caches.descriptors import Cache
from synapse.util.iterutils import batch_iter
from synapse.util.metrics import Measure
logger = logging.getLogger(__name__)

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@ -23,8 +23,8 @@ from signedjson.key import decode_verify_key_bytes
from synapse.storage._base import SQLBaseStore
from synapse.storage.keys import FetchKeyResult
from synapse.util import batch_iter
from synapse.util.caches.descriptors import cached, cachedList
from synapse.util.iterutils import batch_iter
logger = logging.getLogger(__name__)

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@ -17,8 +17,8 @@ from twisted.internet import defer
from synapse.storage._base import SQLBaseStore, make_in_list_sql_clause
from synapse.storage.presence import UserPresenceState
from synapse.util import batch_iter
from synapse.util.caches.descriptors import cached, cachedList
from synapse.util.iterutils import batch_iter
class PresenceStore(SQLBaseStore):

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@ -15,7 +15,6 @@
import logging
import re
from itertools import islice
import attr
@ -107,22 +106,6 @@ class Clock(object):
raise
def batch_iter(iterable, size):
"""batch an iterable up into tuples with a maximum size
Args:
iterable (iterable): the iterable to slice
size (int): the maximum batch size
Returns:
an iterator over the chunks
"""
# make sure we can deal with iterables like lists too
sourceiter = iter(iterable)
# call islice until it returns an empty tuple
return iter(lambda: tuple(islice(sourceiter, size)), ())
def log_failure(failure, msg, consumeErrors=True):
"""Creates a function suitable for passing to `Deferred.addErrback` that
logs any failures that occur.

35
synapse/util/iterutils.py Normal file
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@ -0,0 +1,35 @@
# -*- coding: utf-8 -*-
# Copyright 2014-2016 OpenMarket Ltd
# Copyright 2020 The Matrix.org Foundation C.I.C.
#
# 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 itertools import islice
from typing import Iterable, Iterator, Sequence, Tuple, TypeVar
T = TypeVar("T")
def batch_iter(iterable: Iterable[T], size: int) -> Iterator[Tuple[T]]:
"""batch an iterable up into tuples with a maximum size
Args:
iterable (iterable): the iterable to slice
size (int): the maximum batch size
Returns:
an iterator over the chunks
"""
# make sure we can deal with iterables like lists too
sourceiter = iter(iterable)
# call islice until it returns an empty tuple
return iter(lambda: tuple(islice(sourceiter, size)), ())