org.jlf.vitals
Class VitalsCaptureProcessor

java.lang.Object
  |
  +--org.jlf.vitals.VitalsCaptureProcessor

All Implemented Interfaces:

java.lang.Runnable

public class VitalsCaptureProcessor

extends java.lang.Object

implements java.lang.Runnable

The VitalsCaptureThread class, every second or so, runs through all the vitals that should be collected periodically and captures a measurement on each vital sign that needs to be collected.

Field Summary

protected java.util.Collection	cachedVitals Caches a set of vital signs to capture, so as to not lock up the vitals manager's collection of them.
protected long	cachedVitalsUsed Number of times the processor used the cached copy of periodic vitals.
protected java.lang.Thread	captureThread Holds the thread capturing vitals.
protected static VitalsCaptureProcessor	singleton Holds the current singleton instance of the class.
protected boolean	stopThread This flag could be changed to stop the thread from capturing any more resources.
protected static long	threadNumber The unique identifier for the thread.

Constructor Summary

protected

VitalsCaptureProcessor() Default constructor, starts a thread capturing vitals.

Method Summary

protected void	collectMeasurements() Runs through a set of cached vitals and collect a current measurement on each of them.
protected java.lang.Thread	createCaptureThread() Helper method to create a thread that runs this class to capture vitals.
protected java.util.Collection	getCachedVitals() Manages the cached vitals variable, getting a collection from the vitals manager and refreshing it every so often.
static VitalsCaptureProcessor	getInstance() Gets the current thread responsible for capturing vitals.
boolean	isCapturingVitals() Tells if the current vitals capture processor thread is set to capture vitals.
void	run() Main method to collect measurements.
protected void	setStopThread(boolean stopThreadFlag) Sets the stopThread flag to stop the thread next time through its run loop, to be used when the thread is no longer needed.
void	startCapturingVitals() Starts a new thread (stopping any current thread first) to capture vitals.
void	stopCapturingVitals() Stops the current thread from capturing vitals.

Methods inherited from class java.lang.Object

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

Field Detail

singleton

protected static VitalsCaptureProcessor singleton

Holds the current singleton instance of the class.

threadNumber

protected static long threadNumber

The unique identifier for the thread.

captureThread

protected java.lang.Thread captureThread

Holds the thread capturing vitals.

stopThread

protected boolean stopThread

This flag could be changed to stop the thread from capturing any more resources.

cachedVitals

protected java.util.Collection cachedVitals

Caches a set of vital signs to capture, so as to not lock up the vitals manager's collection of them.

cachedVitalsUsed

protected long cachedVitalsUsed

Number of times the processor used the cached copy of periodic vitals.

Constructor Detail

VitalsCaptureProcessor

protected VitalsCaptureProcessor()

Default constructor, starts a thread capturing vitals.

Method Detail

getInstance

public static VitalsCaptureProcessor getInstance()

Gets the current thread responsible for capturing vitals.

createCaptureThread

protected java.lang.Thread createCaptureThread()

Helper method to create a thread that runs this class to capture vitals.

setStopThread

protected void setStopThread(boolean stopThreadFlag)

Sets the stopThread flag to stop the thread next time through its run loop, to be used when the thread is no longer needed.

stopCapturingVitals

public void stopCapturingVitals()

Stops the current thread from capturing vitals.

startCapturingVitals

public void startCapturingVitals()

Starts a new thread (stopping any current thread first) to capture vitals.

isCapturingVitals

public boolean isCapturingVitals()

Tells if the current vitals capture processor thread is set to capture vitals.

getCachedVitals

protected java.util.Collection getCachedVitals()

Manages the cached vitals variable, getting a collection from the vitals manager and refreshing it every so often.

collectMeasurements

protected void collectMeasurements()

Runs through a set of cached vitals and collect a current measurement on each of them.

run

public void run()

Main method to collect measurements.

Specified by:

run in interface java.lang.Runnable