etm.core.monitor
Class NullMonitor

java.lang.Object
  etm.core.monitor.EtmMonitorSupport
      etm.core.monitor.NullMonitor

All Implemented Interfaces:

EtmMonitor, AggregationStateListener, EtmMonitorListener

public class NullMonitor
extends EtmMonitorSupport

The NullMonitor does nothing and this way may limit the overhead in a production environment.

Version:

$Revision: 204 $

Author:

void.fm

Field Summary

Fields inherited from class etm.core.monitor.EtmMonitorSupport

aggregator, description, plugins, timer

Constructor Summary

NullMonitor()

Method Summary

protected void	doVisitPostCollect(MeasurementPoint aPoint) Callback method for derived classes.
protected void	doVisitPreMeasurement(MeasurementPoint aMeasurementPoint) Callback method for derived classes.
protected Aggregator	getDefaultAggregator()
void	render(MeasurementRenderer renderer) Renders the current measurement results.
java.lang.String	toString()

Methods inherited from class etm.core.monitor.EtmMonitorSupport

addPlugin, aggregate, createPoint, disableCollection, enableCollection, getMetaData, isCollecting, isStarted, onStateLoaded, reset, reset, setPlugins, shutdownPlugins, start, startPlugins, stop, visitPostCollect, visitPreMeasurement

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

NullMonitor

public NullMonitor()

Method Detail

doVisitPreMeasurement

protected void doVisitPreMeasurement(MeasurementPoint aMeasurementPoint)

Description copied from class: EtmMonitorSupport

Callback method for derived classes.

This method is called immediately after the measurement point was created. Note that neither MeasurementPoint.getTicks() nor MeasurementPoint.getStartTime() are set at that point.

Specified by:

doVisitPreMeasurement in class EtmMonitorSupport

Parameters:

aMeasurementPoint - The measurement point just created.

doVisitPostCollect

protected void doVisitPostCollect(MeasurementPoint aPoint)

Description copied from class: EtmMonitorSupport

Callback method for derived classes.

This method is called immediately after the measurement point was collected and marked as closed. At that point the all required information are valid for that measurement point.

Specified by:

doVisitPostCollect in class EtmMonitorSupport

Parameters:

aPoint - The point to collect.

render

public void render(MeasurementRenderer renderer)

Description copied from interface: EtmMonitor

Renders the current measurement results.

Specified by:

render in interface EtmMonitor

Overrides:

render in class EtmMonitorSupport

Parameters:

renderer - A measurement renderer.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getDefaultAggregator

protected Aggregator getDefaultAggregator()

Overrides:

getDefaultAggregator in class EtmMonitorSupport