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, hs):
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super(DeviceInboxStore, self).__init__(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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