adding prompt for heavy random sample generation

Author: Selvam Palanimalai

js/appController.coffee

@@ -31,7 +31,7 @@ socr.controller = (model, view) ->
       percent = Math.ceil((_runsElapsed / _noOfSteps) * 100)
       view.updateStatus "update", percent
     else
-      PubSub.publish "random samples generated", {'sampleCount':model.getRSampleCount()}
+      PubSub.publish "randomSampleGenerationComplete", {'sampleCount':model.getRSampleCount()}
       _this.stop()
     return
 
@@ -147,6 +147,7 @@ socr.controller = (model, view) ->
     # set the K - value in model.
     model.setK()
     $(".tooltips").tooltip()
+
     $(".controller-back").on "click", (e) ->
       e.preventDefault()
       try
@@ -161,7 +162,7 @@ socr.controller = (model, view) ->
 
     $("#runButton").on "click", (e) ->
       e.preventDefault()
-      console.log "Run Started"
+      console.log "Run Started"      
       setTimeout socr.controller.run, 500
       return
 
@@ -244,7 +245,7 @@ socr.controller = (model, view) ->
     try
       model.generateSample() #generate one sample
       $(".removable").remove() #remove the previously generated canvas during animation
-      PubSub.publish "random samples generated"
+      PubSub.publish "randomSampleGenerationComplete"
     catch e
       console.log e
     view.enableButtons()
@@ -264,18 +265,46 @@ socr.controller = (model, view) ->
   @description:It generates X random sample with animation effect showing the generation.
   ###
   run: ->
-    view.disableButtons() #disabling buttons
-    view.updateStatus "started"
-    model.setStopCount $("#countSize").val() #save the stopcount provided by user
-    #generate samples
-    _temp = model.getStopCount() / 1000
-    _noOfSteps = Math.ceil(_temp)
-    d = Date()
-    console.log "start" + _runsElapsed + d
-    _generate()
-    _id = setInterval(_generate, 0)
-    return
+    #this should go through model event.
+    model.set "stopCount" , $("#countSize").val() #save the stopcount provided by user
+
+    compute = ->
+        PubSub.publish "randomSampleGenerationStarted"
+        #generate samples
+        _temp = (model.get "stopCount" )/ 1000
+        _noOfSteps = Math.ceil(_temp)
+        d = Date()
+        console.log "start" + _runsElapsed + d
+        _generate()
+        _id = setInterval(_generate, 0)
+        return
+    #throw warning if datapoints cross threshold.
+    All the computation happens in the within the browser in this app. 
+    if model.aboveThreshold() 
+      $("<div></div>").appendTo("body").html("<div><h6>Caution: Your dataset and sample count selection may consume too much memory causing the tab to become unresponsive. Do you wish to continue?</h6></div>").dialog
+        modal: true
+        title: "Warning!"
+        zIndex: 10000
+        autoOpen: true
+        width: "auto"
+        resizable: false
+        buttons:
+          Yes: ->
+            compute()
+            $(this).dialog "close" #close the confirmation window
+            return
+
+          No: ->
+            $(this).dialog "close"
+            return
+
+        close: (event, ui) ->
+          $(this).remove()
+          return
 
+    else
+      compute()
+        
 
   ###
   @method: stop()
@@ -284,10 +313,11 @@ socr.controller = (model, view) ->
   stop: ->
     d = Date()
     console.log "end" + _runsElapsed + d
-    view.updateSlider()
+
+    PubSub.publish "randomSampleGenerationStopped"
+
     clearInterval _id #stop the setinterval function
     _runsElapsed = 0 #reset the runelapsed count
-    view.enableButtons() #enable buttons
     return
 
 

js/appModel.coffee

@@ -15,7 +15,17 @@ socr.model = ->
   #contains the number of datasets
   #
   # Why there are keys and values? Its because in some form of data input (like coin toss), the "key" contains the symbolic meaningful reference whereas the "value" contains the mathematical equivalent value.
-  #
+  
+  _kvStore = {}
+
+  _stopCount = 1000
+  _count = 0
+  _n = []
+  _K = null
+  _this = this
+
+  MEM_THRESHOLD = 40000000
+  
 
   #::::::: PRIVATE METHODS :::::::::::::::
   ###
@@ -254,11 +264,7 @@ socr.model = ->
     catch e
       console.log e.stack
     socr.tools.zCal.computeP x.zValue, mu, sigma
-  _stopCount = 1000
-  _count = 0
-  _n = []
-  _K = null
-  _this = this
+  
   n: _n
 
   ###
@@ -754,6 +760,7 @@ socr.model = ->
   ###
   getter and setter for variable '_stopCount'
   ###
+  ###
   setStopCount: (y) ->
 
     #alert(y);
@@ -762,7 +769,7 @@ socr.model = ->
 
   getStopCount: ->
     _stopCount
-
+  ###
 
   ###
   getter and setter for variable '_n'
@@ -820,12 +827,27 @@ socr.model = ->
   getter and setter for variable '_count'
   ###
   setRSampleCount: (v) ->
+    socr.model.set "randomSampleCount", _count
     _count = v
     true
 
-  getRSampleCount: ->
+  getRSampleCount: ->    
     _count
 
+  get : (key) ->
+    if (_kvStore[key] isnt undefined)
+      _kvStore[key]
+    else
+      throw new Error key+" doesnt exist in key-value store."
+
+  set : (key,value, dontForce)->
+    if dontForce is true and _kvStore[key] isnt undefined
+      throw new Error "value for key : "+ key + " is already set"
+    else
+      _kvStore[key]  = value
+      true
+
+
   reset: (type) ->
     type = if(typeof type isnt "undefined") then type else "all"
     switch type
@@ -853,7 +875,7 @@ socr.model = ->
         #setting K and n to 0.
         socr.model.setK()
         socr.model.setN()
-        PubSub.publish "application reset"
+        PubSub.publish "appReset"
     return
 
 
@@ -878,4 +900,24 @@ socr.model = ->
   ###
   getK: ->
     _K
+
+  ###
+  @method :aboveThreshold
+  @return : {boolean}
+  ###
+  aboveThreshold: ->
+    _k = 0
+    _sum = 0
+
+    _sampleSize = _count #socr.model.get "randomSampleCount"
+    _stopCount = socr.model.get "stopCount"
+
+    while _k < socr.model.getK()
+      _dataset = socr.model.getDataset(_k)
+      _sum += _dataset.length* ( _sampleSize + _stopCount )
+      _k++
+
+    console.log "aboveThreshold : "+_sum
+    return (_sum > MEM_THRESHOLD)
+
 #return

js/appView.coffee

@@ -220,10 +220,25 @@ socr.view = (model) ->
   ###
   initialize: ->
 
-    PubSub.subscribe "application reset",->
+    PubSub.subscribe "appReset",->
       socr.view.reset()
 
-    PubSub.subscribe "random samples generated", (msg,data)->
+    PubSub.subscribe "randomSampleGenerationStopped", (msg,data) ->
+      socr.view.enableButtons() #enable buttons
+      socr.view.updateSlider()
+
+    PubSub.subscribe "randomSampleGenerationInterrupted", (msg,data) ->
+      socr.view.enableButtons() #enable buttons
+      socr.view.updateSlider()
+      socr.view.updateStatus "interrupted"
+      socr.view.updateCtrlMessage "Generation interrupted.", "error", 1000
+
+    PubSub.subscribe "randomSampleGenerationStarted", (msg,data) ->
+      socr.view.disableButtons() #disabling buttons
+      socr.view.updateStatus "started"
+
+
+    PubSub.subscribe "randomSampleGenerationComplete", (msg,data)->
       #updating controller view slider
       socr.view.updateCtrlMessage "samples generated sucessfully.", "success", 2000
       socr.view.updateStatus "finished"
@@ -868,11 +883,13 @@ socr.view = (model) ->
     console.log "updateStatus"
     return false  if action is `undefined`
     switch action
+
       when "started"
         console.log "started"
         html = "<div class=\"progress progress-info progress-striped active\"><div class=\"bar\" style=\"width:0%\"></div></div>"
         el = $("#progressBar")
         el.html("").removeClass().addClass("span8").css("display", "").html html
+
       when "update"
         return false  if percent is `undefined`
         el = $("div#progressBar > div > div")
@@ -882,9 +899,13 @@ socr.view = (model) ->
           console.log "change"
           el.css "width", percent + "%"
           el.style
+
       when "finished"
-        console.log "finished"
-        el = $("#progressBar").html("").css("display", "none")
+        $("#progressBar").html("").css("display", "none")
+
+      when "interrupted"
+        $("#progressBar").html("").css("display", "none")
+
     return
 
 #