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Move storage classes into a main "data store".

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This is in preparation for having multiple data stores that offer
different functionality, e.g. splitting out state or event storage.
This commit is contained in:
Erik Johnston 2019-10-21 12:56:42 +01:00
parent 1ee97cbd01
commit c66a06ac6b
266 changed files with 4509 additions and 4331 deletions
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359
synapse/storage/relations.py
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@ -17,11 +17,7 @@ import logging
import attr
from synapse.api.constants import RelationTypes
from synapse.api.errors import SynapseError
from synapse.storage._base import SQLBaseStore
from synapse.storage.stream import generate_pagination_where_clause
from synapse.util.caches.descriptors import cached, cachedInlineCallbacks
logger = logging.getLogger(__name__)
@ -113,358 +109,3 @@ class AggregationPaginationToken(object):
def as_tuple(self):
return attr.astuple(self)
class RelationsWorkerStore(SQLBaseStore):
@cached(tree=True)
def get_relations_for_event(
self,
event_id,
relation_type=None,
event_type=None,
aggregation_key=None,
limit=5,
direction="b",
from_token=None,
to_token=None,
):
"""Get a list of relations for an event, ordered by topological ordering.
Args:
event_id (str): Fetch events that relate to this event ID.
relation_type (str|None): Only fetch events with this relation
type, if given.
event_type (str|None): Only fetch events with this event type, if
given.
aggregation_key (str|None): Only fetch events with this aggregation
key, if given.
limit (int): Only fetch the most recent `limit` events.
direction (str): Whether to fetch the most recent first (`"b"`) or
the oldest first (`"f"`).
from_token (RelationPaginationToken|None): Fetch rows from the given
token, or from the start if None.
to_token (RelationPaginationToken|None): Fetch rows up to the given
token, or up to the end if None.
Returns:
Deferred[PaginationChunk]: List of event IDs that match relations
requested. The rows are of the form `{"event_id": "..."}`.
"""
where_clause = ["relates_to_id = ?"]
where_args = [event_id]
if relation_type is not None:
where_clause.append("relation_type = ?")
where_args.append(relation_type)
if event_type is not None:
where_clause.append("type = ?")
where_args.append(event_type)
if aggregation_key:
where_clause.append("aggregation_key = ?")
where_args.append(aggregation_key)
pagination_clause = generate_pagination_where_clause(
direction=direction,
column_names=("topological_ordering", "stream_ordering"),
from_token=attr.astuple(from_token) if from_token else None,
to_token=attr.astuple(to_token) if to_token else None,
engine=self.database_engine,
)
if pagination_clause:
where_clause.append(pagination_clause)
if direction == "b":
order = "DESC"
else:
order = "ASC"
sql = """
SELECT event_id, topological_ordering, stream_ordering
FROM event_relations
INNER JOIN events USING (event_id)
WHERE %s
ORDER BY topological_ordering %s, stream_ordering %s
LIMIT ?
""" % (
" AND ".join(where_clause),
order,
order,
)
def _get_recent_references_for_event_txn(txn):
txn.execute(sql, where_args + [limit + 1])
last_topo_id = None
last_stream_id = None
events = []
for row in txn:
events.append({"event_id": row[0]})
last_topo_id = row[1]
last_stream_id = row[2]
next_batch = None
if len(events) > limit and last_topo_id and last_stream_id:
next_batch = RelationPaginationToken(last_topo_id, last_stream_id)
return PaginationChunk(
chunk=list(events[:limit]), next_batch=next_batch, prev_batch=from_token
)
return self.runInteraction(
"get_recent_references_for_event", _get_recent_references_for_event_txn
)
@cached(tree=True)
def get_aggregation_groups_for_event(
self,
event_id,
event_type=None,
limit=5,
direction="b",
from_token=None,
to_token=None,
):
"""Get a list of annotations on the event, grouped by event type and
aggregation key, sorted by count.
This is used e.g. to get the what and how many reactions have happend
on an event.
Args:
event_id (str): Fetch events that relate to this event ID.
event_type (str|None): Only fetch events with this event type, if
given.
limit (int): Only fetch the `limit` groups.
direction (str): Whether to fetch the highest count first (`"b"`) or
the lowest count first (`"f"`).
from_token (AggregationPaginationToken|None): Fetch rows from the
given token, or from the start if None.
to_token (AggregationPaginationToken|None): Fetch rows up to the
given token, or up to the end if None.
Returns:
Deferred[PaginationChunk]: List of groups of annotations that
match. Each row is a dict with `type`, `key` and `count` fields.
"""
where_clause = ["relates_to_id = ?", "relation_type = ?"]
where_args = [event_id, RelationTypes.ANNOTATION]
if event_type:
where_clause.append("type = ?")
where_args.append(event_type)
having_clause = generate_pagination_where_clause(
direction=direction,
column_names=("COUNT(*)", "MAX(stream_ordering)"),
from_token=attr.astuple(from_token) if from_token else None,
to_token=attr.astuple(to_token) if to_token else None,
engine=self.database_engine,
)
if direction == "b":
order = "DESC"
else:
order = "ASC"
if having_clause:
having_clause = "HAVING " + having_clause
else:
having_clause = ""
sql = """
SELECT type, aggregation_key, COUNT(DISTINCT sender), MAX(stream_ordering)
FROM event_relations
INNER JOIN events USING (event_id)
WHERE {where_clause}
GROUP BY relation_type, type, aggregation_key
{having_clause}
ORDER BY COUNT(*) {order}, MAX(stream_ordering) {order}
LIMIT ?
""".format(
where_clause=" AND ".join(where_clause),
order=order,
having_clause=having_clause,
)
def _get_aggregation_groups_for_event_txn(txn):
txn.execute(sql, where_args + [limit + 1])
next_batch = None
events = []
for row in txn:
events.append({"type": row[0], "key": row[1], "count": row[2]})
next_batch = AggregationPaginationToken(row[2], row[3])
if len(events) <= limit:
next_batch = None
return PaginationChunk(
chunk=list(events[:limit]), next_batch=next_batch, prev_batch=from_token
)
return self.runInteraction(
"get_aggregation_groups_for_event", _get_aggregation_groups_for_event_txn
)
@cachedInlineCallbacks()
def get_applicable_edit(self, event_id):
"""Get the most recent edit (if any) that has happened for the given
event.
Correctly handles checking whether edits were allowed to happen.
Args:
event_id (str): The original event ID
Returns:
Deferred[EventBase|None]: Returns the most recent edit, if any.
"""
# We only allow edits for `m.room.message` events that have the same sender
# and event type. We can't assert these things during regular event auth so
# we have to do the checks post hoc.
# Fetches latest edit that has the same type and sender as the
# original, and is an `m.room.message`.
sql = """
SELECT edit.event_id FROM events AS edit
INNER JOIN event_relations USING (event_id)
INNER JOIN events AS original ON
original.event_id = relates_to_id
AND edit.type = original.type
AND edit.sender = original.sender
WHERE
relates_to_id = ?
AND relation_type = ?
AND edit.type = 'm.room.message'
ORDER by edit.origin_server_ts DESC, edit.event_id DESC
LIMIT 1
"""
def _get_applicable_edit_txn(txn):
txn.execute(sql, (event_id, RelationTypes.REPLACE))
row = txn.fetchone()
if row:
return row[0]
edit_id = yield self.runInteraction(
"get_applicable_edit", _get_applicable_edit_txn
)
if not edit_id:
return
edit_event = yield self.get_event(edit_id, allow_none=True)
return edit_event
def has_user_annotated_event(self, parent_id, event_type, aggregation_key, sender):
"""Check if a user has already annotated an event with the same key
(e.g. already liked an event).
Args:
parent_id (str): The event being annotated
event_type (str): The event type of the annotation
aggregation_key (str): The aggregation key of the annotation
sender (str): The sender of the annotation
Returns:
Deferred[bool]
"""
sql = """
SELECT 1 FROM event_relations
INNER JOIN events USING (event_id)
WHERE
relates_to_id = ?
AND relation_type = ?
AND type = ?
AND sender = ?
AND aggregation_key = ?
LIMIT 1;
"""
def _get_if_user_has_annotated_event(txn):
txn.execute(
sql,
(
parent_id,
RelationTypes.ANNOTATION,
event_type,
sender,
aggregation_key,
),
)
return bool(txn.fetchone())
return self.runInteraction(
"get_if_user_has_annotated_event", _get_if_user_has_annotated_event
)
class RelationsStore(RelationsWorkerStore):
def _handle_event_relations(self, txn, event):
"""Handles inserting relation data during peristence of events
Args:
txn
event (EventBase)
"""
relation = event.content.get("m.relates_to")
if not relation:
# No relations
return
rel_type = relation.get("rel_type")
if rel_type not in (
RelationTypes.ANNOTATION,
RelationTypes.REFERENCE,
RelationTypes.REPLACE,
):
# Unknown relation type
return
parent_id = relation.get("event_id")
if not parent_id:
# Invalid relation
return
aggregation_key = relation.get("key")
self._simple_insert_txn(
txn,
table="event_relations",
values={
"event_id": event.event_id,
"relates_to_id": parent_id,
"relation_type": rel_type,
"aggregation_key": aggregation_key,
},
)
txn.call_after(self.get_relations_for_event.invalidate_many, (parent_id,))
txn.call_after(
self.get_aggregation_groups_for_event.invalidate_many, (parent_id,)
)
if rel_type == RelationTypes.REPLACE:
txn.call_after(self.get_applicable_edit.invalidate, (parent_id,))
def _handle_redaction(self, txn, redacted_event_id):
"""Handles receiving a redaction and checking whether we need to remove
any redacted relations from the database.
Args:
txn
redacted_event_id (str): The event that was redacted.
"""
self._simple_delete_txn(
txn, table="event_relations", keyvalues={"event_id": redacted_event_id}
)