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![Richard van der Hoff](/assets/img/avatar_default.png)
Add db_conn parameters to the `__init__` methods of the *Store classes, so that they are all consistent, which makes the multiple inheritance work correctly (and so that we can later extract mixins which can be used in the slavedstores)
439 lines
16 KiB
Python
439 lines
16 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import ujson
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from twisted.internet import defer
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from .background_updates import BackgroundUpdateStore
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from synapse.util.caches.expiringcache import ExpiringCache
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logger = logging.getLogger(__name__)
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class DeviceInboxStore(BackgroundUpdateStore):
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DEVICE_INBOX_STREAM_ID = "device_inbox_stream_drop"
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def __init__(self, db_conn, hs):
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super(DeviceInboxStore, self).__init__(db_conn, hs)
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self.register_background_index_update(
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"device_inbox_stream_index",
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index_name="device_inbox_stream_id_user_id",
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table="device_inbox",
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columns=["stream_id", "user_id"],
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)
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self.register_background_update_handler(
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self.DEVICE_INBOX_STREAM_ID,
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self._background_drop_index_device_inbox,
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)
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# Map of (user_id, device_id) to the last stream_id that has been
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# deleted up to. This is so that we can no op deletions.
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self._last_device_delete_cache = ExpiringCache(
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cache_name="last_device_delete_cache",
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clock=self._clock,
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max_len=10000,
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expiry_ms=30 * 60 * 1000,
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)
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@defer.inlineCallbacks
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def add_messages_to_device_inbox(self, local_messages_by_user_then_device,
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remote_messages_by_destination):
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"""Used to send messages from this server.
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Args:
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sender_user_id(str): The ID of the user sending these messages.
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local_messages_by_user_and_device(dict):
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Dictionary of user_id to device_id to message.
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remote_messages_by_destination(dict):
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Dictionary of destination server_name to the EDU JSON to send.
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Returns:
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A deferred stream_id that resolves when the messages have been
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inserted.
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"""
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def add_messages_txn(txn, now_ms, stream_id):
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# Add the local messages directly to the local inbox.
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self._add_messages_to_local_device_inbox_txn(
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txn, stream_id, local_messages_by_user_then_device
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)
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# Add the remote messages to the federation outbox.
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# We'll send them to a remote server when we next send a
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# federation transaction to that destination.
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sql = (
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"INSERT INTO device_federation_outbox"
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" (destination, stream_id, queued_ts, messages_json)"
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" VALUES (?,?,?,?)"
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)
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rows = []
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for destination, edu in remote_messages_by_destination.items():
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edu_json = ujson.dumps(edu)
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rows.append((destination, stream_id, now_ms, edu_json))
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txn.executemany(sql, rows)
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with self._device_inbox_id_gen.get_next() as stream_id:
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now_ms = self.clock.time_msec()
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yield self.runInteraction(
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"add_messages_to_device_inbox",
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add_messages_txn,
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now_ms,
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stream_id,
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)
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for user_id in local_messages_by_user_then_device.keys():
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self._device_inbox_stream_cache.entity_has_changed(
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user_id, stream_id
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)
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for destination in remote_messages_by_destination.keys():
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self._device_federation_outbox_stream_cache.entity_has_changed(
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destination, stream_id
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)
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defer.returnValue(self._device_inbox_id_gen.get_current_token())
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@defer.inlineCallbacks
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def add_messages_from_remote_to_device_inbox(
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self, origin, message_id, local_messages_by_user_then_device
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):
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def add_messages_txn(txn, now_ms, stream_id):
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# Check if we've already inserted a matching message_id for that
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# origin. This can happen if the origin doesn't receive our
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# acknowledgement from the first time we received the message.
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already_inserted = self._simple_select_one_txn(
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txn, table="device_federation_inbox",
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keyvalues={"origin": origin, "message_id": message_id},
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retcols=("message_id",),
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allow_none=True,
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)
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if already_inserted is not None:
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return
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# Add an entry for this message_id so that we know we've processed
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# it.
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self._simple_insert_txn(
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txn, table="device_federation_inbox",
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values={
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"origin": origin,
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"message_id": message_id,
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"received_ts": now_ms,
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},
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)
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# Add the messages to the approriate local device inboxes so that
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# they'll be sent to the devices when they next sync.
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self._add_messages_to_local_device_inbox_txn(
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txn, stream_id, local_messages_by_user_then_device
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)
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with self._device_inbox_id_gen.get_next() as stream_id:
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now_ms = self.clock.time_msec()
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yield self.runInteraction(
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"add_messages_from_remote_to_device_inbox",
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add_messages_txn,
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now_ms,
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stream_id,
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)
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for user_id in local_messages_by_user_then_device.keys():
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self._device_inbox_stream_cache.entity_has_changed(
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user_id, stream_id
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)
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defer.returnValue(stream_id)
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def _add_messages_to_local_device_inbox_txn(self, txn, stream_id,
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messages_by_user_then_device):
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sql = (
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"UPDATE device_max_stream_id"
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" SET stream_id = ?"
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" WHERE stream_id < ?"
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)
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txn.execute(sql, (stream_id, stream_id))
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local_by_user_then_device = {}
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for user_id, messages_by_device in messages_by_user_then_device.items():
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messages_json_for_user = {}
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devices = messages_by_device.keys()
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if len(devices) == 1 and devices[0] == "*":
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# Handle wildcard device_ids.
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sql = (
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"SELECT device_id FROM devices"
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" WHERE user_id = ?"
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)
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txn.execute(sql, (user_id,))
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message_json = ujson.dumps(messages_by_device["*"])
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for row in txn:
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# Add the message for all devices for this user on this
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# server.
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device = row[0]
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messages_json_for_user[device] = message_json
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else:
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if not devices:
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continue
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sql = (
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"SELECT device_id FROM devices"
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" WHERE user_id = ? AND device_id IN ("
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+ ",".join("?" * len(devices))
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+ ")"
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)
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# TODO: Maybe this needs to be done in batches if there are
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# too many local devices for a given user.
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txn.execute(sql, [user_id] + devices)
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for row in txn:
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# Only insert into the local inbox if the device exists on
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# this server
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device = row[0]
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message_json = ujson.dumps(messages_by_device[device])
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messages_json_for_user[device] = message_json
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if messages_json_for_user:
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local_by_user_then_device[user_id] = messages_json_for_user
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if not local_by_user_then_device:
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return
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sql = (
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"INSERT INTO device_inbox"
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" (user_id, device_id, stream_id, message_json)"
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" VALUES (?,?,?,?)"
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)
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rows = []
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for user_id, messages_by_device in local_by_user_then_device.items():
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for device_id, message_json in messages_by_device.items():
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rows.append((user_id, device_id, stream_id, message_json))
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txn.executemany(sql, rows)
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def get_new_messages_for_device(
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self, user_id, device_id, last_stream_id, current_stream_id, limit=100
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):
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"""
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Args:
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user_id(str): The recipient user_id.
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device_id(str): The recipient device_id.
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current_stream_id(int): The current position of the to device
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message stream.
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Returns:
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Deferred ([dict], int): List of messages for the device and where
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in the stream the messages got to.
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"""
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has_changed = self._device_inbox_stream_cache.has_entity_changed(
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user_id, last_stream_id
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)
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if not has_changed:
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return defer.succeed(([], current_stream_id))
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def get_new_messages_for_device_txn(txn):
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sql = (
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"SELECT stream_id, message_json FROM device_inbox"
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" WHERE user_id = ? AND device_id = ?"
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" AND ? < stream_id AND stream_id <= ?"
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" ORDER BY stream_id ASC"
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" LIMIT ?"
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)
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txn.execute(sql, (
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user_id, device_id, last_stream_id, current_stream_id, limit
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))
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messages = []
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for row in txn:
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stream_pos = row[0]
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messages.append(ujson.loads(row[1]))
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if len(messages) < limit:
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stream_pos = current_stream_id
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return (messages, stream_pos)
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return self.runInteraction(
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"get_new_messages_for_device", get_new_messages_for_device_txn,
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)
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@defer.inlineCallbacks
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def delete_messages_for_device(self, user_id, device_id, up_to_stream_id):
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"""
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Args:
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user_id(str): The recipient user_id.
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device_id(str): The recipient device_id.
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up_to_stream_id(int): Where to delete messages up to.
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Returns:
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A deferred that resolves to the number of messages deleted.
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"""
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# If we have cached the last stream id we've deleted up to, we can
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# check if there is likely to be anything that needs deleting
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last_deleted_stream_id = self._last_device_delete_cache.get(
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(user_id, device_id), None
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)
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if last_deleted_stream_id:
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has_changed = self._device_inbox_stream_cache.has_entity_changed(
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user_id, last_deleted_stream_id
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)
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if not has_changed:
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defer.returnValue(0)
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def delete_messages_for_device_txn(txn):
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sql = (
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"DELETE FROM device_inbox"
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" WHERE user_id = ? AND device_id = ?"
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" AND stream_id <= ?"
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)
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txn.execute(sql, (user_id, device_id, up_to_stream_id))
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return txn.rowcount
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count = yield self.runInteraction(
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"delete_messages_for_device", delete_messages_for_device_txn
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)
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# Update the cache, ensuring that we only ever increase the value
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last_deleted_stream_id = self._last_device_delete_cache.get(
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(user_id, device_id), 0
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)
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self._last_device_delete_cache[(user_id, device_id)] = max(
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last_deleted_stream_id, up_to_stream_id
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)
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defer.returnValue(count)
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def get_all_new_device_messages(self, last_pos, current_pos, limit):
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"""
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Args:
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last_pos(int):
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current_pos(int):
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limit(int):
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Returns:
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A deferred list of rows from the device inbox
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"""
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if last_pos == current_pos:
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return defer.succeed([])
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def get_all_new_device_messages_txn(txn):
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# We limit like this as we might have multiple rows per stream_id, and
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# we want to make sure we always get all entries for any stream_id
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# we return.
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upper_pos = min(current_pos, last_pos + limit)
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sql = (
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"SELECT max(stream_id), user_id"
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" FROM device_inbox"
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" WHERE ? < stream_id AND stream_id <= ?"
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" GROUP BY user_id"
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)
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txn.execute(sql, (last_pos, upper_pos))
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rows = txn.fetchall()
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sql = (
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"SELECT max(stream_id), destination"
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" FROM device_federation_outbox"
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" WHERE ? < stream_id AND stream_id <= ?"
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" GROUP BY destination"
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)
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txn.execute(sql, (last_pos, upper_pos))
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rows.extend(txn)
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# Order by ascending stream ordering
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rows.sort()
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return rows
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return self.runInteraction(
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"get_all_new_device_messages", get_all_new_device_messages_txn
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)
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def get_to_device_stream_token(self):
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return self._device_inbox_id_gen.get_current_token()
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def get_new_device_msgs_for_remote(
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self, destination, last_stream_id, current_stream_id, limit=100
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):
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"""
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Args:
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destination(str): The name of the remote server.
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last_stream_id(int|long): The last position of the device message stream
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that the server sent up to.
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current_stream_id(int|long): The current position of the device
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message stream.
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Returns:
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Deferred ([dict], int|long): List of messages for the device and where
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in the stream the messages got to.
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"""
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has_changed = self._device_federation_outbox_stream_cache.has_entity_changed(
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destination, last_stream_id
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)
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if not has_changed or last_stream_id == current_stream_id:
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return defer.succeed(([], current_stream_id))
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def get_new_messages_for_remote_destination_txn(txn):
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sql = (
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"SELECT stream_id, messages_json FROM device_federation_outbox"
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" WHERE destination = ?"
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" AND ? < stream_id AND stream_id <= ?"
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" ORDER BY stream_id ASC"
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" LIMIT ?"
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)
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txn.execute(sql, (
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destination, last_stream_id, current_stream_id, limit
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))
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messages = []
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for row in txn:
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stream_pos = row[0]
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messages.append(ujson.loads(row[1]))
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if len(messages) < limit:
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stream_pos = current_stream_id
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return (messages, stream_pos)
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return self.runInteraction(
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"get_new_device_msgs_for_remote",
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get_new_messages_for_remote_destination_txn,
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)
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def delete_device_msgs_for_remote(self, destination, up_to_stream_id):
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"""Used to delete messages when the remote destination acknowledges
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their receipt.
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Args:
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destination(str): The destination server_name
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up_to_stream_id(int): Where to delete messages up to.
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Returns:
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A deferred that resolves when the messages have been deleted.
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"""
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def delete_messages_for_remote_destination_txn(txn):
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sql = (
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"DELETE FROM device_federation_outbox"
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" WHERE destination = ?"
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" AND stream_id <= ?"
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)
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txn.execute(sql, (destination, up_to_stream_id))
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return self.runInteraction(
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"delete_device_msgs_for_remote",
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delete_messages_for_remote_destination_txn
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)
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@defer.inlineCallbacks
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def _background_drop_index_device_inbox(self, progress, batch_size):
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def reindex_txn(conn):
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txn = conn.cursor()
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txn.execute(
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"DROP INDEX IF EXISTS device_inbox_stream_id"
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)
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txn.close()
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yield self.runWithConnection(reindex_txn)
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yield self._end_background_update(self.DEVICE_INBOX_STREAM_ID)
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defer.returnValue(1)
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