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Scala example source code file (YourkitProfiling.scala)

This example Scala source code file (YourkitProfiling.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Scala tags/keywords

controller, int, int, none, none, option, presentableexception, presentableexception, profiling, some, string, unit, yourkitprofiling, yourkitprofiling

The Scala YourkitProfiling.scala source code

package scala.tools
package util

import com.yourkit.api._
import com.yourkit.runtime._
import nsc.io._

class YourkitProfiling extends Profiling {
  @volatile private var active = false
  @volatile private var freq: Option[Int] = None
  lazy val controller = new Controller
  
  def defaultFreq = 100
  def allocationFreq = freq
  def setAllocationFreq(x: Int) = freq = if (x <= 0) None else Some(x)
  
  def startRecordingAllocations() = {
    controller.startAllocationRecording(true, freq getOrElse defaultFreq, false, 0)
  }
  def stopRecordingAllocations() = {
    controller.stopAllocationRecording()
  }
  
  def startProfiling(): Unit = {
    if (isActive)
      return

    active = true
    daemonize(true) {
      try {
        controller.startCPUProfiling(ProfilingModes.CPU_SAMPLING, Controller.DEFAULT_FILTERS)
        if (freq.isDefined)
          startRecordingAllocations()
      }
      catch {
        case _: PresentableException  => () // if it's already running, no big deal 
      }
    }
  }

  def captureSnapshot() = {
    daemonize(true)(controller.captureSnapshot(ProfilingModes.SNAPSHOT_WITH_HEAP))
  }
  
  def stopProfiling() = {
    try {
      if (freq.isDefined)
        stopRecordingAllocations()
    
      controller.stopCPUProfiling()
    }
    catch {
      case _: PresentableException  => () // if it's already running, no big deal
    }
    finally active = false
  }
  
  def advanceGeneration(desc: String) {
    controller.advanceGeneration(desc)
  }
  
  def isActive = active
}

Other Scala examples (source code examples)

Here is a short list of links related to this Scala YourkitProfiling.scala source code file:

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