Add Mandate for modifying simulation throughput on the fly, other things later

app/lib/simulator/Simulator.coffee

@@ -59,6 +59,7 @@ module.exports = class Simulator extends CocoClass
       success: (taskData) =>
         return if @destroyed
         unless taskData
+          @retryDelayInSeconds = 10
           @trigger 'statusUpdate', "No games to simulate. Trying another game in #{@retryDelayInSeconds} seconds."
           @simulateAnotherTaskAfterDelay()
           return

app/models/Mandate.coffee

@@ -0,0 +1,6 @@
+CocoModel = require './CocoModel'
+
+module.exports = class MandateModel extends CocoModel
+  @className: 'Mandate'
+  @schema: require 'schemas/models/mandate.schema'
+  urlRoot: '/db/mandates'

app/schemas/models/mandate.schema.coffee

@@ -0,0 +1,18 @@
+c = require './../schemas'
+
+module.exports = MandateSchema = {
+  type: 'object'
+  additionalProperties: false
+  default:
+    simulationThroughputRatio: 1
+  properties: {
+    simulationThroughputRatio:
+      name: 'Simulation Throughput Ratio'
+      description: '0-1 fraction of requests for a match to simulate that should be granted.'
+      type: 'number'
+      minimum: 0
+      maximum: 1
+  }
+}
+
+c.extendBasicProperties MandateSchema, 'Mandate'

app/views/ladder/SimulateTabView.coffee

@@ -26,9 +26,8 @@ module.exports = class SimulateTabView extends CocoView
   onLoaded: ->
     super()
     @render()
-    # Save our MongoDB oplog!
-    #if (document.location.hash is '#simulate' or @options.level.get('type') is 'course-ladder') and not @simulator
-    #  @startSimulating()
+    if (document.location.hash is '#simulate' or @options.level.get('type') is 'course-ladder') and not @simulator
+      @startSimulating()
 
   getRenderData: ->
     ctx = super()

app/views/play/level/PlayLevelView.coffee

@@ -427,7 +427,7 @@ module.exports = class PlayLevelView extends RootView
 
   shouldSimulate: ->
     return true if @getQueryVariable('simulate') is true
-    return false  # Save our MongoDB oplog!
+    return false if @getQueryVariable('simulate') is false
     stillBuggy = true  # Keep this true while we still haven't fixed the zombie worker problem when simulating the more difficult levels on Chrome
     defaultCores = 2
     cores = window.navigator.hardwareConcurrency or defaultCores  # Available on Chrome/Opera, soon Safari

server/models/Mandate.coffee

@@ -0,0 +1,5 @@
+mongoose = require('mongoose')
+config = require '../../server_config'
+MandateSchema = new mongoose.Schema {}, {strict: false, read: config.mongo.readpref}
+
+module.exports = mongoose.model('mandate', MandateSchema)

server/queues/scoring/getTwoGames.coffee

@@ -3,6 +3,7 @@ async = require 'async'
 errors = require '../../commons/errors'
 scoringUtils = require './scoringUtils'
 LevelSession = require '../../levels/sessions/LevelSession'
+Mandate = require '../../models/Mandate'
 
 module.exports = getTwoGames = (req, res) ->
   #return errors.unauthorized(res, 'You need to be logged in to get games.') unless req.user?.get('email')
@@ -10,11 +11,15 @@ module.exports = getTwoGames = (req, res) ->
   humansSessionID = req.body.humansGameID
   ogresSessionID = req.body.ogresGameID
   return getSpecificSessions res, humansSessionID, ogresSessionID if humansSessionID and ogresSessionID
-  options =
-    background: req.body.background
-    levelID: req.body.levelID
-    leagueID: req.body.leagueID
-  getRandomSessions req.user, options, sendSessionsResponse(res)
+  Mandate.findOne({}).cache(5 * 60 * 1000).exec (err, mandate) ->
+    if err then return errors.serverError res, "Error fetching our Mandate: #{err}"
+    if (throughputRatio = mandate?.get 'simulationThroughputRatio')? and Math.random() > throughputRatio
+      return sendSessionsResponse(res)(null, [])
+    options =
+      background: req.body.background
+      levelID: req.body.levelID
+      leagueID: req.body.leagueID
+    getRandomSessions req.user, options, sendSessionsResponse(res)
 
 sessionSelectionString = 'team totalScore transpiledCode submittedCodeLanguage teamSpells levelID creatorName creator submitDate leagues'
 
@@ -22,7 +27,6 @@ sendSessionsResponse = (res) ->
   (err, sessions) ->
     if err then return errors.serverError res, "Couldn't get two games to simulate: #{err}"
     unless _.filter(sessions).length is 2
-      console.log 'No games to score.', sessions.length
       res.send 204, 'No games to score.'
       return res.end()
     taskObject = messageGenerated: Date.now(), sessions: (scoringUtils.formatSessionInformation session for session in sessions)