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Code Issues Releases Wiki Activity

Remove the lock around the algorithm 

This isn't needed
pull/21833/head
Travis Ralston 2020-07-06 19:37:57 -06:00
parent 70e5da677b
commit 34bd59c151
1 changed files with 119 additions and 129 deletions
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248
src/stores/room-list/algorithms/Algorithm.ts
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@ -33,7 +33,6 @@ import { FILTER_CHANGED, FilterPriority, IFilterCondition } from "../filters/IFi
import { EffectiveMembership, getEffectiveMembership, splitRoomsByMembership } from "../membership";
import { OrderingAlgorithm } from "./list-ordering/OrderingAlgorithm";
import { getListAlgorithmInstance } from "./list-ordering";
import AwaitLock from "await-lock";
// TODO: Add locking support to avoid concurrent writes? https://github.com/vector-im/riot-web/issues/14235
@ -68,7 +67,6 @@ export class Algorithm extends EventEmitter {
} = {};
private allowedByFilter: Map<IFilterCondition, Room[]> = new Map<IFilterCondition, Room[]>();
private allowedRoomsByFilters: Set<Room> = new Set<Room>();
private readonly lock = new AwaitLock();
public constructor() {
super();
@ -643,154 +641,146 @@ export class Algorithm extends EventEmitter {
public async handleRoomUpdate(room: Room, cause: RoomUpdateCause): Promise<boolean> {
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.log(`Handle room update for ${room.roomId} called with cause ${cause}`);
try {
await this.lock.acquireAsync();
if (!this.algorithms) throw new Error("Not ready: no algorithms to determine tags from");
if (!this.algorithms) throw new Error("Not ready: no algorithms to determine tags from");
const isSticky = this._stickyRoom && this._stickyRoom.room === room;
if (cause === RoomUpdateCause.NewRoom) {
const isForLastSticky = this._lastStickyRoom && this._lastStickyRoom.room === room;
const roomTags = this.roomIdsToTags[room.roomId];
const hasTags = roomTags && roomTags.length > 0;
const isSticky = this._stickyRoom && this._stickyRoom.room === room;
if (cause === RoomUpdateCause.NewRoom) {
const isForLastSticky = this._lastStickyRoom && this._lastStickyRoom.room === room;
const roomTags = this.roomIdsToTags[room.roomId];
const hasTags = roomTags && roomTags.length > 0;
// Don't change the cause if the last sticky room is being re-added. If we fail to
// pass the cause through as NewRoom, we'll fail to lie to the algorithm and thus
// lose the room.
if (hasTags && !isForLastSticky) {
console.warn(`${room.roomId} is reportedly new but is already known - assuming TagChange instead`);
cause = RoomUpdateCause.PossibleTagChange;
}
// Don't change the cause if the last sticky room is being re-added. If we fail to
// pass the cause through as NewRoom, we'll fail to lie to the algorithm and thus
// lose the room.
if (hasTags && !isForLastSticky) {
console.warn(`${room.roomId} is reportedly new but is already known - assuming TagChange instead`);
cause = RoomUpdateCause.PossibleTagChange;
}
// If we have tags for a room and don't have the room referenced, the room reference
// probably changed. We need to swap out the problematic reference.
if (hasTags && !this.rooms.includes(room) && !isSticky) {
console.warn(`${room.roomId} is missing from room array but is known - trying to find duplicate`);
this.rooms = this.rooms.map(r => r.roomId === room.roomId ? room : r);
// If we have tags for a room and don't have the room referenced, the room reference
// probably changed. We need to swap out the problematic reference.
if (hasTags && !this.rooms.includes(room) && !isSticky) {
console.warn(`${room.roomId} is missing from room array but is known - trying to find duplicate`);
this.rooms = this.rooms.map(r => r.roomId === room.roomId ? room : r);
// Sanity check
if (!this.rooms.includes(room)) {
throw new Error(`Failed to replace ${room.roomId} with an updated reference`);
}
}
// Like above, update the reference to the sticky room if we need to
if (hasTags && isSticky) {
// Go directly in and set the sticky room's new reference, being careful not
// to trigger a sticky room update ourselves.
this._stickyRoom.room = room;
// Sanity check
if (!this.rooms.includes(room)) {
throw new Error(`Failed to replace ${room.roomId} with an updated reference`);
}
}
if (cause === RoomUpdateCause.PossibleTagChange) {
let didTagChange = false;
const oldTags = this.roomIdsToTags[room.roomId] || [];
const newTags = this.getTagsForRoom(room);
const diff = arrayDiff(oldTags, newTags);
if (diff.removed.length > 0 || diff.added.length > 0) {
for (const rmTag of diff.removed) {
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.log(`Removing ${room.roomId} from ${rmTag}`);
const algorithm: OrderingAlgorithm = this.algorithms[rmTag];
if (!algorithm) throw new Error(`No algorithm for ${rmTag}`);
await algorithm.handleRoomUpdate(room, RoomUpdateCause.RoomRemoved);
}
for (const addTag of diff.added) {
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.log(`Adding ${room.roomId} to ${addTag}`);
const algorithm: OrderingAlgorithm = this.algorithms[addTag];
if (!algorithm) throw new Error(`No algorithm for ${addTag}`);
await algorithm.handleRoomUpdate(room, RoomUpdateCause.NewRoom);
}
// Update the tag map so we don't regen it in a moment
this.roomIdsToTags[room.roomId] = newTags;
// Like above, update the reference to the sticky room if we need to
if (hasTags && isSticky) {
// Go directly in and set the sticky room's new reference, being careful not
// to trigger a sticky room update ourselves.
this._stickyRoom.room = room;
}
}
if (cause === RoomUpdateCause.PossibleTagChange) {
let didTagChange = false;
const oldTags = this.roomIdsToTags[room.roomId] || [];
const newTags = this.getTagsForRoom(room);
const diff = arrayDiff(oldTags, newTags);
if (diff.removed.length > 0 || diff.added.length > 0) {
for (const rmTag of diff.removed) {
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.log(`Changing update cause for ${room.roomId} to Timeline to sort rooms`);
cause = RoomUpdateCause.Timeline;
didTagChange = true;
console.log(`Removing ${room.roomId} from ${rmTag}`);
const algorithm: OrderingAlgorithm = this.algorithms[rmTag];
if (!algorithm) throw new Error(`No algorithm for ${rmTag}`);
await algorithm.handleRoomUpdate(room, RoomUpdateCause.RoomRemoved);
}
for (const addTag of diff.added) {
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.log(`Adding ${room.roomId} to ${addTag}`);
const algorithm: OrderingAlgorithm = this.algorithms[addTag];
if (!algorithm) throw new Error(`No algorithm for ${addTag}`);
await algorithm.handleRoomUpdate(room, RoomUpdateCause.NewRoom);
}
// Update the tag map so we don't regen it in a moment
this.roomIdsToTags[room.roomId] = newTags;
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.log(`Changing update cause for ${room.roomId} to Timeline to sort rooms`);
cause = RoomUpdateCause.Timeline;
didTagChange = true;
} else {
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.warn(`Received no-op update for ${room.roomId} - changing to Timeline update`);
cause = RoomUpdateCause.Timeline;
}
if (didTagChange && isSticky) {
// Manually update the tag for the sticky room without triggering a sticky room
// update. The update will be handled implicitly by the sticky room handling and
// requires no changes on our part, if we're in the middle of a sticky room change.
if (this._lastStickyRoom) {
this._stickyRoom = {
room,
tag: this.roomIdsToTags[room.roomId][0],
position: 0, // right at the top as it changed tags
};
} else {
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.warn(`Received no-op update for ${room.roomId} - changing to Timeline update`);
cause = RoomUpdateCause.Timeline;
}
if (didTagChange && isSticky) {
// Manually update the tag for the sticky room without triggering a sticky room
// update. The update will be handled implicitly by the sticky room handling and
// requires no changes on our part, if we're in the middle of a sticky room change.
if (this._lastStickyRoom) {
this._stickyRoom = {
room,
tag: this.roomIdsToTags[room.roomId][0],
position: 0, // right at the top as it changed tags
};
} else {
// We have to clear the lock as the sticky room change will trigger updates.
this.lock.release();
await this.setStickyRoomAsync(room);
await this.lock.acquireAsync();
}
// We have to clear the lock as the sticky room change will trigger updates.
await this.setStickyRoomAsync(room);
}
}
}
// If the update is for a room change which might be the sticky room, prevent it. We
// need to make sure that the causes (NewRoom and RoomRemoved) are still triggered though
// as the sticky room relies on this.
if (cause !== RoomUpdateCause.NewRoom && cause !== RoomUpdateCause.RoomRemoved) {
if (this.stickyRoom === room) {
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.warn(`[RoomListDebug] Received ${cause} update for sticky room ${room.roomId} - ignoring`);
return false;
}
}
if (!this.roomIdsToTags[room.roomId]) {
// If the update is for a room change which might be the sticky room, prevent it. We
// need to make sure that the causes (NewRoom and RoomRemoved) are still triggered though
// as the sticky room relies on this.
if (cause !== RoomUpdateCause.NewRoom && cause !== RoomUpdateCause.RoomRemoved) {
if (this.stickyRoom === room) {
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.log(`[RoomListDebug] Updating tags for room ${room.roomId} (${room.name})`);
// Get the tags for the room and populate the cache
const roomTags = this.getTagsForRoom(room).filter(t => !isNullOrUndefined(this.cachedRooms[t]));
// "This should never happen" condition - we specify DefaultTagID.Untagged in getTagsForRoom(),
// which means we should *always* have a tag to go off of.
if (!roomTags.length) throw new Error(`Tags cannot be determined for ${room.roomId}`);
this.roomIdsToTags[room.roomId] = roomTags;
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.log(`[RoomListDebug] Updated tags for ${room.roomId}:`, roomTags);
}
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.log(`[RoomListDebug] Reached algorithmic handling for ${room.roomId} and cause ${cause}`);
const tags = this.roomIdsToTags[room.roomId];
if (!tags) {
console.warn(`No tags known for "${room.name}" (${room.roomId})`);
console.warn(`[RoomListDebug] Received ${cause} update for sticky room ${room.roomId} - ignoring`);
return false;
}
}
let changed = false;
for (const tag of tags) {
const algorithm: OrderingAlgorithm = this.algorithms[tag];
if (!algorithm) throw new Error(`No algorithm for ${tag}`);
if (!this.roomIdsToTags[room.roomId]) {
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.log(`[RoomListDebug] Updating tags for room ${room.roomId} (${room.name})`);
await algorithm.handleRoomUpdate(room, cause);
this.cachedRooms[tag] = algorithm.orderedRooms;
// Get the tags for the room and populate the cache
const roomTags = this.getTagsForRoom(room).filter(t => !isNullOrUndefined(this.cachedRooms[t]));
// Flag that we've done something
this.recalculateFilteredRoomsForTag(tag); // update filter to re-sort the list
this.recalculateStickyRoom(tag); // update sticky room to make sure it appears if needed
changed = true;
}
// "This should never happen" condition - we specify DefaultTagID.Untagged in getTagsForRoom(),
// which means we should *always* have a tag to go off of.
if (!roomTags.length) throw new Error(`Tags cannot be determined for ${room.roomId}`);
this.roomIdsToTags[room.roomId] = roomTags;
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.log(`[RoomListDebug] Finished handling ${room.roomId} with cause ${cause} (changed=${changed})`);
return changed;
} finally {
this.lock.release();
console.log(`[RoomListDebug] Updated tags for ${room.roomId}:`, roomTags);
}
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.log(`[RoomListDebug] Reached algorithmic handling for ${room.roomId} and cause ${cause}`);
const tags = this.roomIdsToTags[room.roomId];
if (!tags) {
console.warn(`No tags known for "${room.name}" (${room.roomId})`);
return false;
}
let changed = false;
for (const tag of tags) {
const algorithm: OrderingAlgorithm = this.algorithms[tag];
if (!algorithm) throw new Error(`No algorithm for ${tag}`);
await algorithm.handleRoomUpdate(room, cause);
this.cachedRooms[tag] = algorithm.orderedRooms;
// Flag that we've done something
this.recalculateFilteredRoomsForTag(tag); // update filter to re-sort the list
this.recalculateStickyRoom(tag); // update sticky room to make sure it appears if needed
changed = true;
}
// TODO: Remove debug: https://github.com/vector-im/riot-web/issues/14035
console.log(`[RoomListDebug] Finished handling ${room.roomId} with cause ${cause} (changed=${changed})`);
return changed;
}
}