Added one-minute in-memory server caching for a bunch of common queries.

app/views/ladder/LadderView.coffee

@@ -64,7 +64,7 @@ module.exports = class LadderView extends RootView
     @insertSubView(@ladderTab = new LadderTabView({}, @level, @sessions))
     @insertSubView(@myMatchesTab = new MyMatchesTabView({}, @level, @sessions))
     @insertSubView(@simulateTab = new SimulateTabView())
-    @refreshInterval = setInterval(@fetchSessionsAndRefreshViews.bind(@), 20 * 1000)
+    @refreshInterval = setInterval(@fetchSessionsAndRefreshViews.bind(@), 60 * 1000)
     hash = document.location.hash[1..] if document.location.hash
     if hash and not (hash in ['my-matches', 'simulate', 'ladder', 'prizes', 'rules', 'winners'])
       @showPlayModal(hash) if @sessions.loaded

package.json

@@ -38,36 +38,37 @@
     "multiplayer"
   ],
   "dependencies": {
-    "express": "~3.0.6",
-    "winston": "0.6.x",
-    "passport": "0.1.x",
-    "passport-local": "0.1.x",
-    "moment": "~2.5.0",
-    "mongoose": "3.8.x",
-    "request": "2.12.x",
-    "tv4": "~1.0.16",
-    "lodash": "~2.4.1",
-    "underscore.string": "2.3.x",
-    "async": "0.2.x",
-    "connect": "2.7.x",
-    "coffee-script": "1.9.x",
-    "graceful-fs": "~2.0.1",
-    "node-force-domain": "~0.1.0",
-    "mailchimp-api": "2.0.x",
-    "express-useragent": "~0.0.9",
-    "gridfs-stream": "0.4.x",
-    "stream-buffers": "0.2.x",
-    "sendwithus": "2.1.x",
-    "aws-sdk": "~2.0.0",
-    "bayesian-battle": "0.0.x",
-    "redis": "",
-    "webworker-threads": "~0.5.5",
-    "node-gyp": "~0.13.0",
-    "aether": "~0.3.0",
     "JASON": "~0.1.3",
     "JQDeferred": "~2.1.0",
+    "aether": "~0.3.0",
+    "async": "0.2.x",
+    "aws-sdk": "~2.0.0",
+    "bayesian-battle": "0.0.x",
+    "coffee-script": "1.9.x",
+    "connect": "2.7.x",
+    "express": "~3.0.6",
+    "express-useragent": "~0.0.9",
+    "graceful-fs": "~2.0.1",
+    "gridfs-stream": "0.4.x",
     "jsondiffpatch": "0.1.17",
-    "stripe": "~2.9.0"
+    "lodash": "~2.4.1",
+    "mailchimp-api": "2.0.x",
+    "moment": "~2.5.0",
+    "mongoose": "3.8.x",
+    "mongoose-cache": "https://github.com/nwinter/mongoose-cache/tarball/master",
+    "node-force-domain": "~0.1.0",
+    "node-gyp": "~0.13.0",
+    "passport": "0.1.x",
+    "passport-local": "0.1.x",
+    "redis": "",
+    "request": "2.12.x",
+    "sendwithus": "2.1.x",
+    "stream-buffers": "0.2.x",
+    "stripe": "~2.9.0",
+    "tv4": "~1.0.16",
+    "underscore.string": "2.3.x",
+    "webworker-threads": "~0.5.5",
+    "winston": "0.6.x"
   },
   "devDependencies": {
     "auto-reload-brunch": "> 1.0 < 1.8",

server/commons/database.coffee

@@ -2,6 +2,7 @@ config = require '../../server_config'
 winston = require 'winston'
 mongoose = require 'mongoose'
 Grid = require 'gridfs-stream'
+mongooseCache = require 'mongoose-cache'
 
 global.testing = testing = '--unittest' in process.argv
 
@@ -13,6 +14,7 @@ module.exports.connect = () ->
   mongoose.connect address
   mongoose.connection.once 'open', -> Grid.gfs = Grid(mongoose.connection.db, mongoose.mongo)
 
+  mongooseCache.install(mongoose, {max: 200, maxAge: 1 * 60 * 1000, debug: false})
 
 module.exports.generateMongoConnectionString = ->
   if not testing and config.mongo.mongoose_replica_string

server/levels/level_handler.coffee

@@ -164,6 +164,7 @@ LevelHandler = class LevelHandler extends Handler
       {$match: {'levelID': slug, 'submitted': true, 'team': req.query.team}}
       {$project: {totalScore: 1, _id: 0}}
     ]
+    #query.cache()  # TODO: implement caching for aggregates
 
     query.exec (err, data) =>
       if err? then return @sendDatabaseError res, err
@@ -199,6 +200,7 @@ LevelHandler = class LevelHandler extends Handler
       .limit(req.query.limit)
       .sort(sortParameters)
       .select(selectProperties.join ' ')
+    query.cache() if sessionsQueryParameters.totalScore.$lt is 1000000
 
     query.exec (err, resultSessions) =>
       return @sendDatabaseError(res, err) if err
@@ -269,6 +271,7 @@ LevelHandler = class LevelHandler extends Handler
     query = Level.findOne(findParameters)
     .select(selectString)
     .lean()
+    .cache()
 
     query.exec (err, level) =>
       return @sendDatabaseError(res, err) if err
@@ -280,17 +283,19 @@ LevelHandler = class LevelHandler extends Handler
           majorVersion: level.version.major
         submitted: true
 
-      query = Session.find(sessionsQueryParameters).distinct('team')
+      query = Session.find(sessionsQueryParameters).distinct('team').cache()
       query.exec (err, teams) =>
         return @sendDatabaseError res, err if err? or not teams
         findTop20Players = (sessionQueryParams, team, cb) ->
           sessionQueryParams['team'] = team
-          Session.aggregate [
+          aggregate = Session.aggregate [
             {$match: sessionQueryParams}
             {$project: {'totalScore': 1}}
             {$sort: {'totalScore': -1}}
             {$limit: 20}
-          ], cb
+          ]
+          #aggregate.cache()  # TODO: implement caching for aggregates
+          aggregate.exec cb
 
         async.map teams, findTop20Players.bind(@, sessionsQueryParameters), (err, map) =>
           if err? then return @sendDatabaseError(res, err)

server/levels/thangs/thang_type_handler.coffee

@@ -70,6 +70,8 @@ ThangTypeHandler = class ThangTypeHandler extends Handler
       if limit? and limit < 1000
         q.limit(limit)
 
+      q.cache()
+
       q.exec (err, documents) =>
         return @sendDatabaseError(res, err) if err
         documents = (@formatEntity(req, doc) for doc in documents)

server/queues/scoring.coffee

@@ -138,7 +138,7 @@ module.exports.getTwoGames = (req, res) ->
       'submitted': true
       'team': 'humans'
     selection = 'team totalScore transpiledCode submittedCodeLanguage teamSpells levelID creatorName creator submitDate'
-    LevelSession.count queryParams, (err, numberOfHumans) =>
+    LevelSession.count(queryParams).cache().exec (err, numberOfHumans) =>
       if err? then return errors.serverError(res, 'Couldn\'t get the number of human games')
       unless numberOfHumans
         res.send(204, 'No games to score.')
@@ -149,7 +149,7 @@ module.exports.getTwoGames = (req, res) ->
         'levelID': levelID
         'submitted': true
         'team': 'ogres'
-      LevelSession.count ogreCountParams, (err, numberOfOgres) =>
+      LevelSession.count(ogreCountParams).cache().exec (err, numberOfOgres) =>
         if err? then return errors.serverError(res, 'Couldn\'t get the number of ogre games')
         unless numberOfOgres
           res.send(204, 'No games to score.')

server/users/user_handler.coffee

@@ -172,11 +172,12 @@ UserHandler = class UserHandler extends Handler
   getSimulatorLeaderboard: (req, res) ->
     queryParameters = @getSimulatorLeaderboardQueryParameters(req)
     leaderboardQuery = User.find(queryParameters.query).select('name simulatedBy simulatedFor').sort({'simulatedBy': queryParameters.sortOrder}).limit(queryParameters.limit)
+    leaderboardQuery.cache() if req.query.scoreOffset is -1
     leaderboardQuery.exec (err, otherUsers) ->
-        otherUsers = _.reject otherUsers, _id: req.user._id if req.query.scoreOffset isnt -1
-        otherUsers ?= []
-        res.send(otherUsers)
-        res.end()
+      otherUsers = _.reject otherUsers, _id: req.user._id if req.query.scoreOffset isnt -1
+      otherUsers ?= []
+      res.send(otherUsers)
+      res.end()
 
   getMySimulatorLeaderboardRank: (req, res) ->
     req.query.order = 1

server_setup.coffee

@@ -53,6 +53,7 @@ setupErrorMiddleware = (app) ->
       hipchat.sendHipChatMessage(message, ['tower'], {papertrail: true})
     else
       next(err)
+
 setupExpressMiddleware = (app) ->
   if config.isProduction
     express.logger.format('prod', productionLogging)