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/*
* Copyright 2007-2010 WorldWide Conferencing, LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.liftweb {
package flot_demo {
package web {
package model {
import scala.collection.mutable.{HashMap, HashSet}
import net.liftweb.widgets.flot._
import net.liftweb.common._
import net.liftweb.util._
import net.liftweb.actor._
/*
* This examples simulates a sampling device that takes every 2 seconds different measures.
* It could be, for example, a meteological station that measures the wind speed, the temperature,
* and rain falls.
*/
/**
* in each sample, we can have diferent measures
*/
case class Sample (time: Long, measures: List[Double]) {
override def toString () = {
"time: " + time +
", values: " + measures.foldLeft ("") ((sz, value) => sz + " " + value)
}
}
//
case class AddListener(listener: LiftActor)
case class RemoveListener(listener: LiftActor)
/**
* can a "window" of samples in memory
*/
class AcumSamplesActor (max : Int) extends LiftActor {
val options = new FlotOptions () {
override val xaxis = Full (new FlotAxisOptions () {
override val mode = Full ("time")
})
}
var series : List [FlotSerie] =
new FlotSerie () {
override val label = Full ("Serie 1")
override val data = Nil
} ::
new FlotSerie () {
override val label = Full ("Serie 2")
override val data = Nil
} ::
new FlotSerie () {
override val label = Full ("Serie 3")
override val data = Nil
} ::
Nil
// listeners
var listeners: List[LiftActor] = Nil
def notifyListeners (newData : FlotNewData) = {
listeners.foreach(_ ! newData)
}
protected def messageHandler = {
// nueva Sample
case sample : Sample => {
// actualiza series flot
val seq = for (z <- series zip sample.measures) yield {
new FlotSerie () {
override val label = z._1.label
override val data = z._1.data.takeRight (max) ::: List ((0.0 + sample.time, z._2))
}
}
series = seq.toList
val newDatas = (for (medida <- sample.measures) yield (0.0 + sample.time, medida)).toList
// send the new sampling values to the listener
notifyListeners (FlotNewData (series, newDatas))
}
case AddListener(listener: LiftActor) =>
listeners = listener :: listeners
//
reply (FlotInfo ("", series, options))
case RemoveListener(listener: LiftActor) =>
listeners = listeners.remove(listener.eq)
}
}
// simulates a sensor sending every 2 seconds a sample with 3 measurements:
object Sensor extends _root_.java.lang.Runnable {
val acum = new AcumSamplesActor (10)
def start () = {
new Thread (this).start
}
override def run () : Unit = {
while (true)
{
val time = new _root_.java.util.Date ().getTime ()
val sinus = Math.sin (time)
val cosinus = Math.cos (time)
val both = sinus + 2.0 * cosinus
acum ! Sample (time, List (sinus, cosinus, both))
Thread.sleep (2000)
}
}
}
}
}
}
}
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