attempt to make updating clients via websocket faster

src/public/javascripts/services/tree.js

@@ -795,7 +795,7 @@ ws.subscribeToOutsideSyncMessages(async syncData => {
     syncData.filter(sync => sync.entityName === 'attributes').forEach(sync => {
         const note = treeCache.notes[sync.noteId];
 
-        if (note && note.attributeCache) {
+        if (note && note.__attributeCache) {
             noteIdsToRefresh.add(sync.entityId);
         }
     });
@@ -869,7 +869,7 @@ async function reloadNotes(noteIds, activateNotePath = null) {
     if (activateNotePath) {
         const node = await getNodeFromPath(activateNotePath);
 
-        if (node) {
+        if (node && !node.isActive()) {
             await node.setActive(true);
         }
     }

src/public/javascripts/services/ws.js

@@ -8,7 +8,8 @@ const outsideSyncMessageHandlers = [];
 const messageHandlers = [];
 
 let ws;
-let lastSyncId = window.glob.maxSyncIdAtLoad;
+let lastAcceptedSyncId = window.glob.maxSyncIdAtLoad;
+let lastProcessedSyncId = window.glob.maxSyncIdAtLoad;
 let lastPingTs;
 let syncDataQueue = [];
 
@@ -84,7 +85,7 @@ async function handleMessage(event) {
 let syncIdReachedListeners = [];
 
 function waitForSyncId(desiredSyncId) {
-    if (desiredSyncId <= lastSyncId) {
+    if (desiredSyncId <= lastProcessedSyncId) {
         return Promise.resolve();
     }
 
@@ -99,14 +100,14 @@ function waitForSyncId(desiredSyncId) {
 
 function checkSyncIdListeners() {
     syncIdReachedListeners
-        .filter(l => l.desiredSyncId <= lastSyncId)
+        .filter(l => l.desiredSyncId <= lastProcessedSyncId)
         .forEach(l => l.resolvePromise());
 
     syncIdReachedListeners = syncIdReachedListeners
-        .filter(l => l.desiredSyncId > lastSyncId);
+        .filter(l => l.desiredSyncId > lastProcessedSyncId);
 
     syncIdReachedListeners.filter(l => Date.now() > l.start - 60000)
-        .forEach(l => console.log(`Waiting for syncId ${l.desiredSyncId} while current is ${lastSyncId} for ${Math.floor((Date.now() - l.start) / 1000)}s`));
+        .forEach(l => console.log(`Waiting for syncId ${l.desiredSyncId} while current is ${lastProcessedSyncId} for ${Math.floor((Date.now() - l.start) / 1000)}s`));
 }
 
 async function consumeSyncData() {
@@ -116,13 +117,17 @@ async function consumeSyncData() {
 
         const outsideSyncData = allSyncData.filter(sync => sync.sourceId !== glob.sourceId);
 
+        // we set lastAcceptedSyncId even before sync processing and send ping so that backend can start sending more updates
+        lastAcceptedSyncId = Math.max(lastAcceptedSyncId, allSyncData[allSyncData.length - 1].id);
+        sendPing();
+
         // the update process should be synchronous as a whole but individual handlers can run in parallel
         await Promise.all([
             ...allSyncMessageHandlers.map(syncHandler => syncHandler(allSyncData)),
             ...outsideSyncMessageHandlers.map(syncHandler => syncHandler(outsideSyncData))
         ]);
 
-        lastSyncId = allSyncData[allSyncData.length - 1].id;
+        lastProcessedSyncId = Math.max(lastProcessedSyncId, allSyncData[allSyncData.length - 1].id);
     }
 }
 
@@ -140,29 +145,32 @@ function connectWebSocket() {
     return ws;
 }
 
+async function sendPing() {
+    if (Date.now() - lastPingTs > 30000) {
+        console.log(utils.now(), "Lost connection to server");
+    }
+
+    if (ws.readyState === ws.OPEN) {
+        ws.send(JSON.stringify({
+            type: 'ping',
+            lastSyncId: lastAcceptedSyncId
+        }));
+    }
+    else if (ws.readyState === ws.CLOSED || ws.readyState === ws.CLOSING) {
+        console.log(utils.now(), "WS closed or closing, trying to reconnect");
+
+        ws = connectWebSocket();
+    }
+}
+
 setTimeout(() => {
     ws = connectWebSocket();
 
-    lastSyncId = glob.maxSyncIdAtLoad;
+    lastAcceptedSyncId = glob.maxSyncIdAtLoad;
+    lastProcessedSyncId = glob.maxSyncIdAtLoad;
     lastPingTs = Date.now();
 
-    setInterval(async () => {
-        if (Date.now() - lastPingTs > 30000) {
-            console.log(utils.now(), "Lost connection to server");
-        }
-
-        if (ws.readyState === ws.OPEN) {
-            ws.send(JSON.stringify({
-                type: 'ping',
-                lastSyncId: lastSyncId
-            }));
-        }
-        else if (ws.readyState === ws.CLOSED || ws.readyState === ws.CLOSING) {
-            console.log(utils.now(), "WS closed or closing, trying to reconnect");
-
-            ws = connectWebSocket();
-        }
-    }, 1000);
+    setInterval(sendPing, 1000);
 }, 0);
 
 subscribeToMessages(message => {

src/routes/api/note_revisions.js

@@ -125,7 +125,8 @@ async function getEditedNotesOnDate(req) {
                 SELECT noteId FROM note_revisions
                 WHERE note_revisions.dateLastEdited LIKE '${date}%'
         )
-        ORDER BY isDeleted`);
+        ORDER BY isDeleted
+        LIMIT 50`);
 
     for (const note of notes) {
         const notePath = noteCacheService.getNotePath(note.noteId);

src/services/sync_table.js

@@ -4,13 +4,25 @@ const dateUtils = require('./date_utils');
 const log = require('./log');
 const cls = require('./cls');
 
+let syncs = [];
+
 async function addEntitySync(entityName, entityId, sourceId) {
-    await sql.replace("sync", {
+    const sync = {
         entityName: entityName,
         entityId: entityId,
         utcSyncDate: dateUtils.utcNowDateTime(),
         sourceId: sourceId || cls.getSourceId() || sourceIdService.getCurrentSourceId()
-    });
+    };
+
+    sync.id = await sql.replace("sync", sync);
+
+    syncs.push(sync);
+
+    setTimeout(() => require('./ws').sendPingToAllClients(), 50);
+}
+
+function getEntitySyncsNewerThan(syncId) {
+    return syncs.filter(s => s.id > syncId);
 }
 
 async function cleanupSyncRowsForMissingEntities(entityName, entityKey) {
@@ -83,5 +95,6 @@ module.exports = {
     addAttributeSync: async (attributeId, sourceId) => await addEntitySync("attributes", attributeId, sourceId),
     addApiTokenSync: async (apiTokenId, sourceId) => await addEntitySync("api_tokens", apiTokenId, sourceId),
     addEntitySync,
-    fillAllSyncRows
+    fillAllSyncRows,
+    getEntitySyncsNewerThan
 };

src/services/ws.js

@@ -5,6 +5,7 @@ const sql = require('./sql');
 const syncMutexService = require('./sync_mutex');
 
 let webSocketServer;
+let lastAcceptedSyncIds = {};
 
 function init(httpServer, sessionParser) {
     webSocketServer = new WebSocket.Server({
@@ -23,7 +24,11 @@ function init(httpServer, sessionParser) {
     });
 
     webSocketServer.on('connection', (ws, req) => {
-        console.log("websocket client connected");
+        ws.id = utils.randomString(10);
+
+        lastAcceptedSyncIds[ws.id] = 0;
+
+        console.log(`websocket client connected`);
 
         ws.on('message', messageJson => {
             const message = JSON.parse(messageJson);
@@ -32,7 +37,9 @@ function init(httpServer, sessionParser) {
                 log.error('JS Error: ' + message.error);
             }
             else if (message.type === 'ping') {
-                syncMutexService.doExclusively(async () => await sendPing(ws, message.lastSyncId));
+                lastAcceptedSyncIds[ws.id] = message.lastSyncId;
+
+                syncMutexService.doExclusively(async () => await sendPing(ws));
             }
             else {
                 log.error('Unrecognized message: ');
@@ -64,8 +71,8 @@ function sendMessageToAllClients(message) {
     }
 }
 
-async function sendPing(client, lastSentSyncId) {
-    const syncData = await sql.getRows("SELECT * FROM sync WHERE id > ?", [lastSentSyncId]);
+async function sendPing(client) {
+    const syncData = require('./sync_table').getEntitySyncsNewerThan(lastAcceptedSyncIds[client.id]);
 
     for (const sync of syncData) {
         // fill in some extra data needed by the frontend
@@ -92,6 +99,14 @@ async function sendPing(client, lastSentSyncId) {
     });
 }
 
+function sendPingToAllClients() {
+    if (webSocketServer) {
+        webSocketServer.clients.forEach(function each(client) {
+           sendPing(client);
+        });
+    }
+}
+
 function refreshTree() {
     sendMessageToAllClients({ type: 'refresh-tree' });
 }
@@ -109,5 +124,6 @@ module.exports = {
     sendMessageToAllClients,
     refreshTree,
     syncPullInProgress,
-    syncPullFinished
+    syncPullFinished,
+    sendPingToAllClients
 };