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improvement: efficient /sync, mutex for federation transactions

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This commit is contained in:
Timo Kösters 2021-07-01 19:55:26 +02:00
parent 1c25492a7e
commit e15e6d4405
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GPG key ID: 24DA7517711A2BA4
5 changed files with 359 additions and 263 deletions
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382
src/client_server/sync.rs
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@ -227,13 +227,16 @@ async fn sync_helper(
// Database queries:
let current_shortstatehash = db.rooms.current_shortstatehash(&room_id)?;
let current_shortstatehash = db
.rooms
.current_shortstatehash(&room_id)?
.expect("All rooms have state");
// These type is Option<Option<_>>. The outer Option is None when there is no event between
// since and the current room state, meaning there should be no updates.
// The inner Option is None when there is an event, but there is no state hash associated
// with it. This can happen for the RoomCreate event, so all updates should arrive.
let first_pdu_before_since = db.rooms.pdus_until(&sender_user, &room_id, since).next();
let first_pdu_before_since = db
.rooms
.pdus_until(&sender_user, &room_id, since)
.next()
.transpose()?;
let pdus_after_since = db
.rooms
@ -241,11 +244,78 @@ async fn sync_helper(
.next()
.is_some();
let since_shortstatehash = first_pdu_before_since.as_ref().map(|pdu| {
db.rooms
.pdu_shortstatehash(&pdu.as_ref().ok()?.1.event_id)
.ok()?
});
let since_shortstatehash = first_pdu_before_since
.as_ref()
.map(|pdu| {
db.rooms
.pdu_shortstatehash(&pdu.1.event_id)
.transpose()
.expect("all pdus have state")
})
.transpose()?;
// Calculates joined_member_count, invited_member_count and heroes
let calculate_counts = || {
let joined_member_count = db.rooms.room_members(&room_id).count();
let invited_member_count = db.rooms.room_members_invited(&room_id).count();
// Recalculate heroes (first 5 members)
let mut heroes = Vec::new();
if joined_member_count + invited_member_count <= 5 {
// Go through all PDUs and for each member event, check if the user is still joined or
// invited until we have 5 or we reach the end
for hero in db
.rooms
.all_pdus(&sender_user, &room_id)
.filter_map(|pdu| pdu.ok()) // Ignore all broken pdus
.filter(|(_, pdu)| pdu.kind == EventType::RoomMember)
.map(|(_, pdu)| {
let content = serde_json::from_value::<
ruma::events::room::member::MemberEventContent,
>(pdu.content.clone())
.map_err(|_| Error::bad_database("Invalid member event in database."))?;
if let Some(state_key) = &pdu.state_key {
let user_id = UserId::try_from(state_key.clone()).map_err(|_| {
Error::bad_database("Invalid UserId in member PDU.")
})?;
// The membership was and still is invite or join
if matches!(
content.membership,
MembershipState::Join | MembershipState::Invite
) && (db.rooms.is_joined(&user_id, &room_id)?
|| db.rooms.is_invited(&user_id, &room_id)?)
{
Ok::<_, Error>(Some(state_key.clone()))
} else {
Ok(None)
}
} else {
Ok(None)
}
})
// Filter out buggy users
.filter_map(|u| u.ok())
// Filter for possible heroes
.flatten()
{
if heroes.contains(&hero) || hero == sender_user.as_str() {
continue;
}
heroes.push(hero);
}
}
(
Some(joined_member_count),
Some(invited_member_count),
heroes,
)
};
let (
heroes,
@ -253,63 +323,107 @@ async fn sync_helper(
invited_member_count,
joined_since_last_sync,
state_events,
) = if pdus_after_since && Some(current_shortstatehash) != since_shortstatehash {
let current_state = db.rooms.room_state_full(&room_id)?;
let current_members = current_state
.iter()
.filter(|(key, _)| key.0 == EventType::RoomMember)
.map(|(key, value)| (&key.1, value)) // Only keep state key
.collect::<Vec<_>>();
let encrypted_room = current_state
.get(&(EventType::RoomEncryption, "".to_owned()))
.is_some();
let since_state = since_shortstatehash
.as_ref()
.map(|since_shortstatehash| {
since_shortstatehash
.map(|since_shortstatehash| db.rooms.state_full(since_shortstatehash))
.transpose()
})
.transpose()?;
) = if since_shortstatehash.is_none() {
// Probably since = 0, we will do an initial sync
let (joined_member_count, invited_member_count, heroes) = calculate_counts();
let since_encryption = since_state.as_ref().map(|state| {
state
.as_ref()
.map(|state| state.get(&(EventType::RoomEncryption, "".to_owned())))
});
let current_state_ids = db.rooms.state_full_ids(current_shortstatehash)?;
let state_events = current_state_ids
.iter()
.map(|id| db.rooms.get_pdu(id))
.filter_map(|r| r.ok().flatten())
.collect::<Vec<_>>();
(
heroes,
joined_member_count,
invited_member_count,
true,
state_events,
)
} else if !pdus_after_since || since_shortstatehash == Some(current_shortstatehash) {
// No state changes
(Vec::new(), None, None, false, Vec::new())
} else {
// Incremental /sync
let since_shortstatehash = since_shortstatehash.unwrap();
let since_sender_member = db
.rooms
.state_get(
since_shortstatehash,
&EventType::RoomMember,
sender_user.as_str(),
)?
.and_then(|pdu| {
serde_json::from_value::<Raw<ruma::events::room::member::MemberEventContent>>(
pdu.content.clone(),
)
.expect("Raw::from_value always works")
.deserialize()
.map_err(|_| Error::bad_database("Invalid PDU in database."))
.ok()
});
let joined_since_last_sync = since_sender_member
.map_or(true, |member| member.membership != MembershipState::Join);
let current_state_ids = db.rooms.state_full_ids(current_shortstatehash)?;
let since_state_ids = db.rooms.state_full_ids(since_shortstatehash)?;
let state_events = if joined_since_last_sync {
current_state_ids
.iter()
.map(|id| db.rooms.get_pdu(id))
.filter_map(|r| r.ok().flatten())
.collect::<Vec<_>>()
} else {
current_state_ids
.difference(&since_state_ids)
.filter(|id| {
!timeline_pdus
.iter()
.any(|(_, timeline_pdu)| timeline_pdu.event_id == **id)
})
.map(|id| db.rooms.get_pdu(id))
.filter_map(|r| r.ok().flatten())
.collect()
};
let encrypted_room = db
.rooms
.state_get(current_shortstatehash, &EventType::RoomEncryption, "")?
.is_some();
let since_encryption =
db.rooms
.state_get(since_shortstatehash, &EventType::RoomEncryption, "")?;
// Calculations:
let new_encrypted_room =
encrypted_room && since_encryption.map_or(true, |encryption| encryption.is_none());
let new_encrypted_room = encrypted_room && since_encryption.is_none();
let send_member_count = since_state.as_ref().map_or(true, |since_state| {
since_state.as_ref().map_or(true, |since_state| {
current_members.len()
!= since_state
.iter()
.filter(|(key, _)| key.0 == EventType::RoomMember)
.count()
})
});
let since_sender_member = since_state.as_ref().map(|since_state| {
since_state.as_ref().and_then(|state| {
state
.get(&(EventType::RoomMember, sender_user.as_str().to_owned()))
.and_then(|pdu| {
serde_json::from_value::<
Raw<ruma::events::room::member::MemberEventContent>,
>(pdu.content.clone())
.expect("Raw::from_value always works")
.deserialize()
.map_err(|_| Error::bad_database("Invalid PDU in database."))
.ok()
})
})
});
let send_member_count = state_events
.iter()
.any(|event| event.kind == EventType::RoomMember);
if encrypted_room {
for (user_id, current_member) in current_members {
for (user_id, current_member) in db
.rooms
.room_members(&room_id)
.filter_map(|r| r.ok())
.filter_map(|user_id| {
db.rooms
.state_get(
current_shortstatehash,
&EventType::RoomMember,
user_id.as_str(),
)
.ok()
.flatten()
.map(|current_member| (user_id, current_member))
})
{
let current_membership = serde_json::from_value::<
Raw<ruma::events::room::member::MemberEventContent>,
>(current_member.content.clone())
@ -318,31 +432,23 @@ async fn sync_helper(
.map_err(|_| Error::bad_database("Invalid PDU in database."))?
.membership;
let since_membership =
since_state
.as_ref()
.map_or(MembershipState::Leave, |since_state| {
since_state
.as_ref()
.and_then(|since_state| {
since_state
.get(&(EventType::RoomMember, user_id.clone()))
.and_then(|since_member| {
serde_json::from_value::<
Raw<ruma::events::room::member::MemberEventContent>,
>(
since_member.content.clone()
)
.expect("Raw::from_value always works")
.deserialize()
.map_err(|_| {
Error::bad_database("Invalid PDU in database.")
})
.ok()
})
})
.map_or(MembershipState::Leave, |member| member.membership)
});
let since_membership = db
.rooms
.state_get(
since_shortstatehash,
&EventType::RoomMember,
user_id.as_str(),
)?
.and_then(|since_member| {
serde_json::from_value::<
Raw<ruma::events::room::member::MemberEventContent>,
>(since_member.content.clone())
.expect("Raw::from_value always works")
.deserialize()
.map_err(|_| Error::bad_database("Invalid PDU in database."))
.ok()
})
.map_or(MembershipState::Leave, |member| member.membership);
let user_id = UserId::try_from(user_id.clone())
.map_err(|_| Error::bad_database("Invalid UserId in member PDU."))?;
@ -364,10 +470,6 @@ async fn sync_helper(
}
}
let joined_since_last_sync = since_sender_member.map_or(true, |member| {
member.map_or(true, |member| member.membership != MembershipState::Join)
});
if joined_since_last_sync && encrypted_room || new_encrypted_room {
// If the user is in a new encrypted room, give them all joined users
device_list_updates.extend(
@ -387,100 +489,11 @@ async fn sync_helper(
}
let (joined_member_count, invited_member_count, heroes) = if send_member_count {
let joined_member_count = db.rooms.room_members(&room_id).count();
let invited_member_count = db.rooms.room_members_invited(&room_id).count();
// Recalculate heroes (first 5 members)
let mut heroes = Vec::new();
if joined_member_count + invited_member_count <= 5 {
// Go through all PDUs and for each member event, check if the user is still joined or
// invited until we have 5 or we reach the end
for hero in db
.rooms
.all_pdus(&sender_user, &room_id)
.filter_map(|pdu| pdu.ok()) // Ignore all broken pdus
.filter(|(_, pdu)| pdu.kind == EventType::RoomMember)
.map(|(_, pdu)| {
let content = serde_json::from_value::<
ruma::events::room::member::MemberEventContent,
>(pdu.content.clone())
.map_err(|_| {
Error::bad_database("Invalid member event in database.")
})?;
if let Some(state_key) = &pdu.state_key {
let user_id =
UserId::try_from(state_key.clone()).map_err(|_| {
Error::bad_database("Invalid UserId in member PDU.")
})?;
// The membership was and still is invite or join
if matches!(
content.membership,
MembershipState::Join | MembershipState::Invite
) && (db.rooms.is_joined(&user_id, &room_id)?
|| db.rooms.is_invited(&user_id, &room_id)?)
{
Ok::<_, Error>(Some(state_key.clone()))
} else {
Ok(None)
}
} else {
Ok(None)
}
})
// Filter out buggy users
.filter_map(|u| u.ok())
// Filter for possible heroes
.flatten()
{
if heroes.contains(&hero) || hero == sender_user.as_str() {
continue;
}
heroes.push(hero);
}
}
(
Some(joined_member_count),
Some(invited_member_count),
heroes,
)
calculate_counts()
} else {
(None, None, Vec::new())
};
let state_events = if joined_since_last_sync {
current_state
.iter()
.map(|(_, pdu)| pdu.to_sync_state_event())
.collect()
} else {
match since_state {
None => Vec::new(),
Some(Some(since_state)) => current_state
.iter()
.filter(|(key, value)| {
since_state.get(key).map(|e| &e.event_id) != Some(&value.event_id)
})
.filter(|(_, value)| {
!timeline_pdus.iter().any(|(_, timeline_pdu)| {
timeline_pdu.kind == value.kind
&& timeline_pdu.state_key == value.state_key
})
})
.map(|(_, pdu)| pdu.to_sync_state_event())
.collect(),
Some(None) => current_state
.iter()
.map(|(_, pdu)| pdu.to_sync_state_event())
.collect(),
}
};
(
heroes,
joined_member_count,
@ -488,8 +501,6 @@ async fn sync_helper(
joined_since_last_sync,
state_events,
)
} else {
(Vec::new(), None, None, false, Vec::new())
};
// Look for device list updates in this room
@ -580,7 +591,10 @@ async fn sync_helper(
events: room_events,
},
state: sync_events::State {
events: state_events,
events: state_events
.iter()
.map(|pdu| pdu.to_sync_state_event())
.collect(),
},
ephemeral: sync_events::Ephemeral { events: edus },
};