Feature/bulk redis payload processing

CONTRIBUTING.md

@@ -30,7 +30,7 @@ It is also always helpful to have some context for your pull request. What was t
 ```
 meteor create --release 1.8.1 --bare test
 cd test
-meteor npm i --save [email protected] simpl-schema
+meteor npm i --save [email protected] simpl-schema chai
 ```
 
 ### Start Tests

lib/config.js

@@ -55,6 +55,12 @@ let Config = {
             },
         },
     },
+    // Max number of redis payloads we attempt to process before just triggering a requery
+    maxRedisEventsToProcess: 300,
+    // Debounce interval after which we flush the queued redis payloads
+    debounceInterval: 100,
+    // Maximum wait time for flushing queued redis payloads
+    maxDebounceWait: 3000
 };
 
 export default Config;

lib/mongo/lib/dispatchers.js

@@ -1,5 +1,4 @@
 import { Meteor } from 'meteor/meteor';
-import { DDPServer } from 'meteor/ddp-server';
 import { EJSON } from 'meteor/ejson';
 import { Events, RedisPipe } from '../../constants';
 import RedisSubscriptionManager from '../../redis/RedisSubscriptionManager';
@@ -8,21 +7,15 @@ import getDedicatedChannel from '../../utils/getDedicatedChannel';
 import Config from '../../config';
 import OptimisticInvocation from '../OptimisticInvocation';
 
-const dispatchEvents = function(optimistic, collectionName, channels, events) {
+const dispatchEvents = function dispatchEventsFn(optimistic, collectionName, channels, events) {
     if (optimistic) {
-        OptimisticInvocation.withValue(true, () => {
+      OptimisticInvocation.withValue(true, () => {
             events.forEach(event => {
                 const docId = event[RedisPipe.DOC]._id;
-                const dedicatedChannel = getDedicatedChannel(
-                    collectionName,
-                    docId
-                );
-                RedisSubscriptionManager.process(dedicatedChannel, event);
-
-                channels.forEach(channelName => {
-                    RedisSubscriptionManager.process(channelName, event);
-                });
+                const dedicatedChannel = getDedicatedChannel(collectionName, docId);
+                RedisSubscriptionManager.process(dedicatedChannel, [event]);
             });
+            channels.forEach(channel => RedisSubscriptionManager.process(channel, events));
         });
     }
 

lib/processors/actions/requery.js

@@ -1,44 +1,38 @@
-import { _ } from 'meteor/underscore';
-import { EJSON } from 'meteor/ejson';
-import { Events } from '../../constants';
 import { MongoIDMap } from '../../cache/mongoIdMap';
 
 /**
  * @param observableCollection
- * @param newCommer
- * @param event
- * @param modifiedFields
+ * @param documentMap 
  */
-export default function (observableCollection, newCommer, event, modifiedFields) {
+export default function (observableCollection, documentMap) {
     const { store, selector, options } = observableCollection;
 
     const newStore = new MongoIDMap();
     const freshIds = observableCollection.collection.find(
         selector, { ...options, fields: { _id: 1 } }).fetch();
     freshIds.forEach(doc => newStore.set(doc._id, doc));
 
-    let added = false;
     store.compareWith(newStore, {
+        // Any documents found only on the left store
+        // should be removed
         leftOnly(docId) {
             observableCollection.remove(docId);
         },
+        // Any documents found in both and with documentMap entries
+        // have received redis updates indicating there are changes
+        both(docId) {
+            if (documentMap[docId]) {
+                observableCollection.change(documentMap[docId])
+            }
+        },
+        // Any documents only present in the right store are newly
+        // added
         rightOnly(docId) {
-            if (newCommer && EJSON.equals(docId, newCommer._id)) {
-                added = true;
-                observableCollection.add(newCommer);
+            if (documentMap[docId]) {
+                observableCollection.add(documentMap[docId]);
             } else {
                 observableCollection.addById(docId);
             }
         }
     });
-
-    // if we have an update, and we have a newcommer, that new commer may be inside the ids
-    // TODO: maybe refactor this in a separate action (?)
-    if (newCommer
-        && Events.UPDATE === event
-        && modifiedFields
-        && !added
-        && store.has(newCommer._id)) {
-        observableCollection.change(newCommer, modifiedFields);
-    }
 }

lib/processors/default.js

@@ -1,32 +1,13 @@
-import { Events } from '../constants';
+import { Meteor } from 'meteor/meteor';
+import Config from '../config';
+import RedisPipe, { Events } from '../constants';
+import requery from './actions/requery';
 
 /**
  * @param observableCollection
- * @param event
  * @param doc
- * @param modifiedFields
  */
-export default function(observableCollection, event, doc, modifiedFields) {
-    switch (event) {
-        case Events.INSERT:
-            handleInsert(observableCollection, doc);
-            break;
-        case Events.UPDATE:
-            handleUpdate(observableCollection, doc, modifiedFields);
-            break;
-        case Events.REMOVE:
-            handleRemove(observableCollection, doc);
-            break;
-        default:
-            throw new Meteor.Error(`Invalid event specified: ${event}`);
-    }
-}
-
-/**
- * @param observableCollection
- * @param doc
- */
-const handleInsert = function(observableCollection, doc) {
+const handleInsert = (observableCollection, doc) => {
     if (
         !observableCollection.contains(doc._id) &&
         observableCollection.isEligible(doc)
@@ -36,30 +17,63 @@ const handleInsert = function(observableCollection, doc) {
 };
 
 /**
- * @param observableCollection
- * @param doc
- * @param modifiedFields
- */
-const handleUpdate = function(observableCollection, doc, modifiedFields) {
+* @param observableCollection
+* @param doc
+* @param modifiedFields
+*/
+const handleUpdate = (observableCollection, doc, modifiedFields) => {
     if (observableCollection.isEligible(doc)) {
         if (observableCollection.contains(doc._id)) {
             observableCollection.change(doc, modifiedFields);
         } else {
             observableCollection.add(doc);
         }
-    } else {
-        if (observableCollection.contains(doc._id)) {
-            observableCollection.remove(doc._id);
-        }
+    } else if (observableCollection.contains(doc._id)) {
+        observableCollection.remove(doc._id);
     }
 };
 
 /**
- * @param observableCollection
- * @param doc
- */
-const handleRemove = function(observableCollection, doc) {
+* @param observableCollection
+* @param doc
+*/
+const handleRemove = (observableCollection, doc) => {
     if (observableCollection.contains(doc._id)) {
         observableCollection.remove(doc._id);
     }
 };
+
+/**
+ * @param observableCollection 
+ * @param events 
+ * @param documentMap 
+ */
+export default function(observableCollection, events, documentMap) {
+    const needsRequery = events.length > Config.maxRedisEventsToProcess;
+
+    if (needsRequery) {
+        requery(observableCollection, documentMap);
+        return;
+    }
+
+    for (let i = 0; i < events.length; i++) {
+        const event = events[i];
+        const docId = event[RedisPipe.DOC]._id;
+        const modifiedFields = event[RedisPipe.FIELDS];
+        const doc = documentMap[docId];
+
+        switch (event[RedisPipe.EVENT]) {
+            case Events.INSERT:
+                handleInsert(observableCollection, doc);
+                break;
+            case Events.UPDATE:
+                handleUpdate(observableCollection, doc, modifiedFields);
+                break;
+            case Events.REMOVE:
+                handleRemove(observableCollection, doc);
+                break;
+            default:
+                throw new Meteor.Error(`Invalid event specified: ${event}`);
+        }
+    }
+}