net.java.truevfs.ext.insight.I5tOutputStream.scala Maven / Gradle / Ivy

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Instruments the TrueVFS Kernel for statistics monitoring via JMX. Add the JAR artifact of this module to the run time class path to make its services available for service location in the client API modules.

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/*
 * Copyright (C) 2005-2013 Schlichtherle IT Services.
 * All rights reserved. Use is subject to license terms.
 */
package net.java.truevfs.ext.insight

import java.io._
import javax.annotation._
import javax.annotation.concurrent._
import net.java.truevfs.comp.inst._
import net.java.truevfs.comp.jmx._

/**
 * A controller for an [[java.io.OutputStream]].
 *
 * @author Christian Schlichtherle
 */
@NotThreadSafe
private final class I5tOutputStream(
  mediator: I5tMediator, @WillCloseWhenClosed out: OutputStream
) extends InstrumentingOutputStream(mediator, out) with JmxComponent {

  override def activate() { }

  override def write(b: Int) {
    val start = System.nanoTime
    out write b
    mediator logWrite (System.nanoTime - start, 1)
  }

  override def write(b: Array[Byte], off: Int, len: Int) {
    val start = System.nanoTime
    out write (b, off, len)
    mediator logWrite (System.nanoTime - start, len)
  }
}