534 lines
17 KiB
Python
534 lines
17 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 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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from twisted.internet import defer
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from synapse.api.events.room import (
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RoomMemberEvent, RoomTopicEvent, FeedbackEvent, RoomNameEvent,
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RoomRedactionEvent,
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)
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from synapse.util.logutils import log_function
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from .directory import DirectoryStore
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from .feedback import FeedbackStore
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from .presence import PresenceStore
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from .profile import ProfileStore
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from .registration import RegistrationStore
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from .room import RoomStore
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from .roommember import RoomMemberStore
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from .stream import StreamStore
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from .transactions import TransactionStore
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from .keys import KeyStore
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from .event_federation import EventFederationStore
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from .state import StateStore
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from .signatures import SignatureStore
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from syutil.base64util import decode_base64
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from synapse.crypto.event_signing import compute_event_reference_hash
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import json
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import logging
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import os
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logger = logging.getLogger(__name__)
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SCHEMAS = [
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"transactions",
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"users",
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"profiles",
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"presence",
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"im",
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"room_aliases",
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"keys",
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"redactions",
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"state",
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"event_edges",
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"event_signatures",
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]
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# Remember to update this number every time an incompatible change is made to
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# database schema files, so the users will be informed on server restarts.
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SCHEMA_VERSION = 6
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class _RollbackButIsFineException(Exception):
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""" This exception is used to rollback a transaction without implying
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something went wrong.
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"""
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pass
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class DataStore(RoomMemberStore, RoomStore,
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RegistrationStore, StreamStore, ProfileStore, FeedbackStore,
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PresenceStore, TransactionStore,
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DirectoryStore, KeyStore, StateStore, SignatureStore,
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EventFederationStore, ):
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def __init__(self, hs):
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super(DataStore, self).__init__(hs)
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self.event_factory = hs.get_event_factory()
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self.hs = hs
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self.min_token_deferred = self._get_min_token()
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self.min_token = None
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@defer.inlineCallbacks
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@log_function
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def persist_event(self, event, backfilled=False, is_new_state=True):
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stream_ordering = None
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if backfilled:
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if not self.min_token_deferred.called:
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yield self.min_token_deferred
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self.min_token -= 1
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stream_ordering = self.min_token
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try:
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yield self.runInteraction(
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"persist_event",
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self._persist_event_txn,
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event=event,
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backfilled=backfilled,
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stream_ordering=stream_ordering,
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is_new_state=is_new_state,
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)
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except _RollbackButIsFineException:
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pass
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@defer.inlineCallbacks
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def get_event(self, event_id, allow_none=False):
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events_dict = yield self._simple_select_one(
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"events",
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{"event_id": event_id},
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[
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"event_id",
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"type",
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"room_id",
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"content",
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"unrecognized_keys",
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"depth",
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],
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allow_none=allow_none,
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)
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if not events_dict:
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defer.returnValue(None)
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event = yield self._parse_events([events_dict])
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defer.returnValue(event[0])
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@log_function
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def _persist_event_txn(self, txn, event, backfilled, stream_ordering=None,
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is_new_state=True):
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if event.type == RoomMemberEvent.TYPE:
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self._store_room_member_txn(txn, event)
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elif event.type == FeedbackEvent.TYPE:
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self._store_feedback_txn(txn, event)
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elif event.type == RoomNameEvent.TYPE:
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self._store_room_name_txn(txn, event)
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elif event.type == RoomTopicEvent.TYPE:
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self._store_room_topic_txn(txn, event)
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elif event.type == RoomRedactionEvent.TYPE:
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self._store_redaction(txn, event)
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outlier = False
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if hasattr(event, "outlier"):
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outlier = event.outlier
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vals = {
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"topological_ordering": event.depth,
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"event_id": event.event_id,
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"type": event.type,
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"room_id": event.room_id,
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"content": json.dumps(event.content),
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"processed": True,
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"outlier": outlier,
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"depth": event.depth,
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}
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if stream_ordering is not None:
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vals["stream_ordering"] = stream_ordering
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unrec = {
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k: v
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for k, v in event.get_full_dict().items()
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if k not in vals.keys() and k not in [
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"redacted",
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"redacted_because",
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"signatures",
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"hashes",
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"prev_events",
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]
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}
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vals["unrecognized_keys"] = json.dumps(unrec)
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try:
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self._simple_insert_txn(
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txn,
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"events",
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vals,
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or_replace=(not outlier),
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or_ignore=bool(outlier),
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)
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except:
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logger.warn(
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"Failed to persist, probably duplicate: %s",
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event.event_id,
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exc_info=True,
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)
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raise _RollbackButIsFineException("_persist_event")
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self._handle_prev_events(
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txn,
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outlier=outlier,
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event_id=event.event_id,
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prev_events=event.prev_events,
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room_id=event.room_id,
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)
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self._store_state_groups_txn(txn, event)
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is_state = hasattr(event, "state_key") and event.state_key is not None
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if is_new_state and is_state:
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vals = {
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"event_id": event.event_id,
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"room_id": event.room_id,
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"type": event.type,
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"state_key": event.state_key,
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}
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if hasattr(event, "replaces_state"):
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vals["prev_state"] = event.replaces_state
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self._simple_insert_txn(
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txn,
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"state_events",
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vals,
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or_replace=True,
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)
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self._simple_insert_txn(
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txn,
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"current_state_events",
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{
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"event_id": event.event_id,
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"room_id": event.room_id,
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"type": event.type,
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"state_key": event.state_key,
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},
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or_replace=True,
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)
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for e_id, h in event.prev_state:
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self._simple_insert_txn(
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txn,
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table="event_edges",
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values={
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"event_id": event.event_id,
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"prev_event_id": e_id,
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"room_id": event.room_id,
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"is_state": 1,
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},
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or_ignore=True,
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)
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if not backfilled:
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self._simple_insert_txn(
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txn,
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table="state_forward_extremities",
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values={
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"event_id": event.event_id,
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"room_id": event.room_id,
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"type": event.type,
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"state_key": event.state_key,
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},
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or_replace=True,
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)
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for prev_state_id, _ in event.prev_state:
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self._simple_delete_txn(
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txn,
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table="state_forward_extremities",
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keyvalues={
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"event_id": prev_state_id,
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}
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)
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for hash_alg, hash_base64 in event.hashes.items():
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hash_bytes = decode_base64(hash_base64)
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self._store_event_content_hash_txn(
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txn, event.event_id, hash_alg, hash_bytes,
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)
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if hasattr(event, "signatures"):
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logger.debug("sigs: %s", event.signatures)
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for name, sigs in event.signatures.items():
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for key_id, signature_base64 in sigs.items():
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signature_bytes = decode_base64(signature_base64)
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self._store_event_signature_txn(
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txn, event.event_id, name, key_id,
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signature_bytes,
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)
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for prev_event_id, prev_hashes in event.prev_events:
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for alg, hash_base64 in prev_hashes.items():
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hash_bytes = decode_base64(hash_base64)
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self._store_prev_event_hash_txn(
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txn, event.event_id, prev_event_id, alg, hash_bytes
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)
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for auth_id, _ in event.auth_events:
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self._simple_insert_txn(
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txn,
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table="event_auth",
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values={
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"event_id": event.event_id,
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"room_id": event.room_id,
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"auth_id": auth_id,
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},
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or_ignore=True,
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)
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(ref_alg, ref_hash_bytes) = compute_event_reference_hash(event)
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self._store_event_reference_hash_txn(
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txn, event.event_id, ref_alg, ref_hash_bytes
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)
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self._update_min_depth_for_room_txn(txn, event.room_id, event.depth)
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def _store_redaction(self, txn, event):
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txn.execute(
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"INSERT OR IGNORE INTO redactions "
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"(event_id, redacts) VALUES (?,?)",
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(event.event_id, event.redacts)
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)
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@defer.inlineCallbacks
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def get_current_state(self, room_id, event_type=None, state_key=""):
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del_sql = (
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"SELECT event_id FROM redactions WHERE redacts = e.event_id "
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"LIMIT 1"
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)
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sql = (
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"SELECT e.*, (%(redacted)s) AS redacted FROM events as e "
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"INNER JOIN current_state_events as c ON e.event_id = c.event_id "
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"INNER JOIN state_events as s ON e.event_id = s.event_id "
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"WHERE c.room_id = ? "
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) % {
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"redacted": del_sql,
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}
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if event_type:
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sql += " AND s.type = ? AND s.state_key = ? "
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args = (room_id, event_type, state_key)
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else:
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args = (room_id, )
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results = yield self._execute_and_decode(sql, *args)
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events = yield self._parse_events(results)
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defer.returnValue(events)
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@defer.inlineCallbacks
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def _get_min_token(self):
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row = yield self._execute(
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None,
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"SELECT MIN(stream_ordering) FROM events"
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)
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self.min_token = row[0][0] if row and row[0] and row[0][0] else -1
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self.min_token = min(self.min_token, -1)
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logger.debug("min_token is: %s", self.min_token)
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defer.returnValue(self.min_token)
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def insert_client_ip(self, user, access_token, device_id, ip, user_agent):
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return self._simple_insert(
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"user_ips",
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{
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"user": user.to_string(),
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"access_token": access_token,
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"device_id": device_id,
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"ip": ip,
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"user_agent": user_agent,
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"last_seen": int(self._clock.time_msec()),
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}
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)
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def get_user_ip_and_agents(self, user):
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return self._simple_select_list(
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table="user_ips",
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keyvalues={"user": user.to_string()},
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retcols=[
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"device_id", "access_token", "ip", "user_agent", "last_seen"
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],
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)
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def snapshot_room(self, event):
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"""Snapshot the room for an update by a user
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Args:
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room_id (synapse.types.RoomId): The room to snapshot.
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user_id (synapse.types.UserId): The user to snapshot the room for.
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state_type (str): Optional state type to snapshot.
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state_key (str): Optional state key to snapshot.
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Returns:
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synapse.storage.Snapshot: A snapshot of the state of the room.
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"""
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def _snapshot(txn):
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prev_events = self._get_latest_events_in_room(
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txn,
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event.room_id
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)
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prev_state = None
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state_key = None
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if hasattr(event, "state_key"):
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state_key = event.state_key
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prev_state = self._get_latest_state_in_room(
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txn,
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event.room_id,
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type=event.type,
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state_key=state_key,
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)
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return Snapshot(
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store=self,
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room_id=event.room_id,
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user_id=event.user_id,
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prev_events=prev_events,
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prev_state=prev_state,
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state_type=event.type,
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state_key=state_key,
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)
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return self.runInteraction("snapshot_room", _snapshot)
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class Snapshot(object):
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"""Snapshot of the state of a room
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Args:
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store (DataStore): The datastore.
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room_id (RoomId): The room of the snapshot.
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user_id (UserId): The user this snapshot is for.
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prev_events (list): The list of event ids this snapshot is after.
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membership_state (RoomMemberEvent): The current state of the user in
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the room.
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state_type (str, optional): State type captured by the snapshot
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state_key (str, optional): State key captured by the snapshot
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prev_state_pdu (PduEntry, optional): pdu id of
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the previous value of the state type and key in the room.
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"""
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def __init__(self, store, room_id, user_id, prev_events,
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prev_state, state_type=None, state_key=None):
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self.store = store
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self.room_id = room_id
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self.user_id = user_id
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self.prev_events = prev_events
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self.prev_state = prev_state
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self.state_type = state_type
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self.state_key = state_key
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def fill_out_prev_events(self, event):
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if not hasattr(event, "prev_events"):
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event.prev_events = [
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(event_id, hashes)
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for event_id, hashes, _ in self.prev_events
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]
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if self.prev_events:
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event.depth = max([int(v) for _, _, v in self.prev_events]) + 1
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else:
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event.depth = 0
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if not hasattr(event, "prev_state") and self.prev_state is not None:
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event.prev_state = self.prev_state
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def schema_path(schema):
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""" Get a filesystem path for the named database schema
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Args:
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schema: Name of the database schema.
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Returns:
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A filesystem path pointing at a ".sql" file.
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"""
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dir_path = os.path.dirname(__file__)
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schemaPath = os.path.join(dir_path, "schema", schema + ".sql")
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return schemaPath
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def read_schema(schema):
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""" Read the named database schema.
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Args:
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schema: Name of the datbase schema.
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Returns:
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A string containing the database schema.
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"""
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with open(schema_path(schema)) as schema_file:
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return schema_file.read()
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def prepare_database(db_conn):
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""" Set up all the dbs. Since all the *.sql have IF NOT EXISTS, so we
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don't have to worry about overwriting existing content.
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"""
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c = db_conn.cursor()
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c.execute("PRAGMA user_version")
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row = c.fetchone()
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if row and row[0]:
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user_version = row[0]
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if user_version > SCHEMA_VERSION:
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raise ValueError(
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"Cannot use this database as it is too " +
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"new for the server to understand"
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)
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elif user_version < SCHEMA_VERSION:
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logging.info(
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"Upgrading database from version %d",
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user_version
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)
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# Run every version since after the current version.
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for v in range(user_version + 1, SCHEMA_VERSION + 1):
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sql_script = read_schema("delta/v%d" % (v))
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c.executescript(sql_script)
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db_conn.commit()
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else:
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sql_script = "BEGIN TRANSACTION;\n"
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for sql_loc in SCHEMAS:
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sql_script += read_schema(sql_loc)
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sql_script += "\n"
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sql_script += "COMMIT TRANSACTION;"
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c.executescript(sql_script)
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db_conn.commit()
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c.execute("PRAGMA user_version = %d" % SCHEMA_VERSION)
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c.close()
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