net.java.truevfs.ext.insight.I5tMediator.scala Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of truevfs-ext-insight Show documentation

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.

There is a newer version: 0.14.0

Show newest version

/*
 * 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 java.nio.channels._
import javax.annotation.concurrent._
import net.java.truevfs.comp.inst._
import net.java.truevfs.comp.jmx._
import net.java.truevfs.ext.insight.stats._
import net.java.truevfs.kernel.spec._
import net.java.truecommons.cio._

/**
 * A mediator for the instrumentation of the TrueVFS Kernel with JMX.
 *
 * @author Christian Schlichtherle
 */
@ThreadSafe
private abstract class I5tMediator(val subject: String)
extends JmxMediator[I5tMediator] {

  assert(null ne subject)

  private[this] val logger = new FsLogger

  def newStats(offset: Int): I5tStatistics

  private def activateStats(offset: Int) { activate(newStats(offset)) }

  final def activateStats(origin: JmxComponent) { activateStats(0) }

  final def activateAllStats(origin: JmxComponent) {
    for (mediator <- mediators) mediator activateStats origin
  }

  def rotateStats(origin: JmxComponent) { activateStats(logger rotate ()) }

  final def rotateAllStats(origin: JmxComponent) {
    for (mediator <- mediators) mediator rotateStats origin
  }

  final def logRead(nanos: Long, bytes: Int) { logger logRead (nanos, bytes) }
  final def logWrite(nanos: Long, bytes: Int) { logger logWrite (nanos, bytes) }
  final def logSync(nanos: Long) { logger logSync nanos }
  final def stats(offset: Int) = { logger stats offset }

  final def formatOffset(offset: Int) = { logger format offset }

  final override def toString = "%s[subject=%s]".format(getClass.getName, subject)

  final override def instrument(subject: FsManager) =
    activate(new I5tManager(syncOperationsMediator, subject))

  final override def instrument(subject: IoBufferPool) =
    new InstrumentingBufferPool[I5tMediator](bufferIoMediator, subject)

  final override def instrument(origin: InstrumentingManager[I5tMediator], subject: FsCompositeDriver) =
    new InstrumentingCompositeDriver[I5tMediator](this, subject)

  final override def instrument(origin: InstrumentingManager[I5tMediator], subject: FsController) =
    new InstrumentingController[I5tMediator](applicationIoMediator, subject)

  final override def instrument(origin: InstrumentingBufferPool[I5tMediator], subject: IoBuffer) =
    activate(new JmxBuffer[I5tMediator](this, subject))

  final override def instrument(origin: InstrumentingCompositeDriver[I5tMediator], subject: FsModel) =
    activate(new JmxModel[I5tMediator](this, subject))

  final override def instrument(origin: InstrumentingCompositeDriver[I5tMediator], subject: FsController) =
    new InstrumentingController[I5tMediator](kernelIoMediator, subject)

  final override def instrument[E <: Entry](origin: InstrumentingController[I5tMediator], subject: InputSocket[E]) =
    new InstrumentingInputSocket[I5tMediator, E](this, subject)

  final override def instrument[E <: Entry](origin: InstrumentingController[I5tMediator], subject: OutputSocket[E]) =
    new InstrumentingOutputSocket[I5tMediator, E](this, subject)

  final override def instrument[B <: IoBuffer](origin: InstrumentingBuffer[I5tMediator], subject: InputSocket[B]) =
    new InstrumentingInputSocket[I5tMediator, B](this, subject)

  final override def instrument[B <: IoBuffer](origin: InstrumentingBuffer[I5tMediator], subject: OutputSocket[B]) =
    new InstrumentingOutputSocket[I5tMediator, B](this, subject)

  final override def instrument[E <: Entry](origin: InstrumentingInputSocket[I5tMediator, E], subject: InputStream) =
    activate(new I5tInputStream(this, subject))

  final override def instrument[E <: Entry](origin: InstrumentingInputSocket[I5tMediator, E], subject: SeekableByteChannel) =
    activate(new I5tSeekableChannel(this, subject))

  final override def instrument[E <: Entry](origin: InstrumentingOutputSocket[I5tMediator, E], subject: OutputStream) =
    activate(new I5tOutputStream(this, subject))

  final override def instrument[E <: Entry](origin: InstrumentingOutputSocket[I5tMediator, E], subject: SeekableByteChannel) =
    activate(new I5tSeekableChannel(this, subject))
}