stella.sensor

Class BadSensor

java.lang.Object

util.PropertyContainer

util.PropertyResources

util.rmi.RmiPropertyContainer

util.rmi.AbstractRmiCaster

stella.sensor.AbstractSensor

stella.sensor.TimerTaskSensor

stella.sensor.DataSensor

stella.sensor.CumulativeSensor

stella.sensor.PredictiveSensor

stella.sensor.SmoothingSensor

stella.sensor.DerivativeSensor

stella.sensor.WeatherSensor

stella.sensor.BadSensor

All Implemented Interfaces:

ParameterDepending, Cloneable, Remote, Caster, DataCaster, RmiDataCaster, RmiErrorCaster, Cumulating, Deriving, Predicting, Smoothing, Telemetering, WeatherJudging, WeatherCaster, ExitCleaning, Initializable, PropertySupplying, ResourceSupplying, RmiCaster, RmiPropertyBearing

public class BadSensor
extends WeatherSensor
implements ParameterDepending

A bad sensor does not generate data events based on reading a true sensor, but generates it from evaluating a probability description. Three parameter govern the sensor

• KEY_GOODPERIOD: The average good-weather period in ms.
• KEY_BADPERIOD: The average bad-weather period in ms.
• KEY_BADFRACTION: The long-aim fraction of bad to good weather periods.

The sensor works as follows: We start with good weather and estimate a first bad-weather period by doing a gaussian-distributed randomization around the bad weather period with the KEY_GAUSSSIGMA gauss sigma. After the initial bad weather, we calculate the fraction of the accumulated bad to good weather phases. This fraction is compared to the target bad fraction and a normal random pick determines whether the weather changes or not. Any weather change will produce only sensor readings (KEY_GOODREADING or KEY_BADREADING) until the next change commences. To allow this sensor to work seamless

Default mappings are for a typical humidity sensor at a bad level of 0.2, and a good period of 4 days, a bad period of one day, if started with the default respawn rate of 1 second.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	BadSensor.Randomize Class for testing.

Nested classes/interfaces inherited from class stella.sensor.TimerTaskSensor

TimerTaskSensor.SensorRead

Nested classes/interfaces inherited from class util.PropertyResources

PropertyResources.Load, PropertyResources.URLResource

Field Summary

Fields

Modifier and Type	Field and Description
private long	badcount Cumulated bad period.
private static double	DEFBADFRACTION The default bad weather period.
private static long	DEFBADPERIOD The default bad weather period.
private static double	DEFBADREADING The default good reading.
private static double	DEFGAUSSSIGMA The default sigma.
private static long	DEFGOODPERIOD The default good weather period.
private static double	DEFGOODREADING The default good reading.
private static long	DEFMAXPERIOD The default maximum period.
private static long	DEFMINPERIOD The default minimum period.
private static String	DEFTIME The default time parameter.
private long	goodcount Cumulated good period.
static String	KEY_BADFRACTION The key to standard bad weather fraction.
static String	KEY_BADPERIOD The key to standard bad weather period.
static String	KEY_BADREADING The key to standard bad reading.
static String	KEY_GAUSSSIGMA The key to the standard deviation of the weather periods.
static String	KEY_GOODPERIOD The key to standard good weather period.
static String	KEY_GOODREADING The key to standard good reading.
static String	KEY_MAXPERIOD The key to maximum weather period.
static String	KEY_MINPERIOD The key to minimum weather period.
static String	KEY_TIME The key giving the name of the time parameter.
private long	period Current active period.
private static Random	random My random number generator.
private CurrentTime	time A special time grabbed from the parameter cluster.
private long	toggled Last time of weather change.
private boolean	weather Current active weather.

Fields inherited from class stella.sensor.WeatherSensor

KEY_DERIVATIVEINVALID, KEY_DERIVATIVEPARAMETER, KEY_INVERSE, KEY_INVERSEDERIVATIVE, KEY_JUDGEDERIVATIVE, KEY_JUDGEPREDICT, KEY_JUDGERAW, KEY_JUDGESMOOTH, KEY_PREDICTINVALID, KEY_PREDICTPARAMETER, KEY_RAWINVALID, KEY_RAWPARAMETER, KEY_RETARDBADDERIVATIVE, KEY_RETARDBADPREDICT, KEY_RETARDBADRAW, KEY_RETARDBADSMOOTH, KEY_RETARDGOODDERIVATIVE, KEY_RETARDGOODPREDICT, KEY_RETARDGOODRAW, KEY_RETARDGOODSMOOTH, KEY_SMOOTHINVALID, KEY_SMOOTHPARAMETER

Fields inherited from class stella.sensor.DerivativeSensor

DEFRAWDERIVATIVE, derive, KEY_DERIVATIVEADVISE, KEY_DERIVE, KEY_PATH, KEY_RAWDERIVATIVE, z

Fields inherited from class stella.sensor.SmoothingSensor

f, g, KEY_SMOOTH, KEY_SMOOTHADVISE

Fields inherited from class stella.sensor.PredictiveSensor

KEY_CHI, KEY_EXTRAPOLATE, KEY_FUTURE, KEY_PREDICTADVISE, predict

Fields inherited from class stella.sensor.CumulativeSensor

KEY_AVERAGE, KEY_MEMORY, KEY_PACK

Fields inherited from class stella.sensor.DataSensor

DEFRAWFORMAT, DEFREPORT, DEFSIGMAFORMAT, KEY_RAWFORMAT, KEY_REPORT, KEY_SIGMAFORMAT

Fields inherited from class stella.sensor.TimerTaskSensor

KEY_LOGRAWABOVE, KEY_LOGRAWBELOW, KEY_LOGREADLAG, KEY_RESPAWN

Fields inherited from class stella.sensor.AbstractSensor

KEY_BIND, KEY_BINDNAME, KEY_CONVERT, KEY_DESCRIPTION, KEY_SENSORNAME

Fields inherited from class util.rmi.AbstractRmiCaster

ALTERNATEHOST, ALTERNATEPORT, KEY_EXPORTPORT, KEY_REGISTRYHOST, KEY_REGISTRYPORT

Fields inherited from class util.PropertyResources

KEY_NOINITONCREATE, POSTFIX_ALPHABET, POSTFIX_BYTES, POSTFIX_DIR, POSTFIX_EXT, POSTFIX_FILE, POSTFIX_LIST, POSTFIX_MODTIME, POSTFIX_URL

Fields inherited from class util.PropertyContainer

KEY_LISTSEPARATOR, KEY_MAPKEYVALUECHAR, KEY_MAPSEPARATOR

Fields inherited from interface stella.rmi.RmiDataCaster

NAMING_EXTENSION

Fields inherited from interface util.PropertySupplying

CONFIG, KEY_CLASS

Fields inherited from interface util.ResourceSupplying

KEY_URLRESOURCES, KEY_URLUSECONFIG, KEY_URLUSECURRENT, KEY_URLUSEHOME

Constructor Summary

Constructors

Constructor and Description
BadSensor(Map prop) Constructs a new fake sensor.

Method Summary

Modifier and Type	Method and Description
private long	getWeatherPeriod(long stdperiod, double sigma) Returns a new weather period.
TimerTask	initSensorTimerTask() Starts the sensor.
protected double	readSensor() Returns the current weather depending reading.
void	registerParameter(Parameter systime) If we have a time, use it.
boolean	validReading() A bad sensor is always valid.

Methods inherited from class stella.sensor.WeatherSensor

addWeatherListener, conductOneMeasure, currentlyClear, currentlyRetarding, generateDataEvent, getMinClearUpTime, getSensorInitInfo, goodFromDerivative, goodFromPredict, goodFromRaw, goodFromSmooth, isDerivativeRetard, isPredictRetard, isRawRetard, isSmoothRetard, judgeWeather, notifyWeatherListener, removeWeatherListener, status

Methods inherited from class stella.sensor.DerivativeSensor

deriveAt, getDerivativeFormat, getDerivativeToggleInfo, getDerivator, getLastDerivative, isDerivativeAdvise, isDeriving, newData, regetDerive, registerDerivator

Methods inherited from class stella.sensor.SmoothingSensor

getLastSmooth, getSmoother, getSmoothToggleInfo, isSmoothAdvise, isSmoothing, regetSmooth, registerSmoother, smoothOne

Methods inherited from class stella.sensor.PredictiveSensor

getExtrapolation, getLastPredict, getPredictToggleInfo, init, isPredictAdvise, isPredicting, isReliable, predictFrom, regetPredict

Methods inherited from class stella.sensor.CumulativeSensor

cumulateOne, getLastRaw, getLastTime, getMaxSize, getMemory, getSize

Methods inherited from class stella.sensor.DataSensor

addDataListener, addRmiDataListener, exit, getRawFormat, getSigmaFormat, removeDataListener, removeRmiDataListener, report

Methods inherited from class stella.sensor.TimerTaskSensor

cancel, equals, getRawToggleInfo, getReading, getRespawn, getTimeOfRead, hashCode, isReady, regetRaw, setTimeOfRead, validReading

Methods inherited from class stella.sensor.AbstractSensor

addRmiErrorListener, createSensor, getBindName, getConvert, getSensorDescription, getSensorName, notifyErrorListener, removeRmiErrorListener, setConvert, toString

Methods inherited from class util.rmi.AbstractRmiCaster

bindToRegistry, bindToRegistry, bindToRegistry, bindToRegistry, bindToRegistry, bindToRegistry, casterExit, casterExit, getBindName, isValid, unbindFromRegistry, unbindFromRegistry

Methods inherited from class util.rmi.RmiPropertyContainer

containsRemoteProperty, getRemoteProperties, getRemoteProperty, setRemoteProperty

Methods inherited from class util.PropertyResources

clone, createFrom, createFrom, createFrom, createInstance, getApplet, getAsResources, getLocate, getPropertiesToKey, getPropertiesToKey, getResource, getResourceAsStream, getResourceFromKey, getResources, hasLocalURLs, initProperties, keyCreate, keyCreate, reload, setApplet

Methods inherited from class util.PropertyContainer

augment, augment, augment, augment, augment, defaultBoolean, defaultChar, defaultDouble, defaultFloat, defaultInt, defaultLong, defaultObject, defaultObject, defaultProperties, defaultProperty, getAsBoolean, getAsChar, getAsDouble, getAsEnums, getAsFloat, getAsInt, getAsList, getAsLong, getAsMap, getAsMap, getAsObject, getAsObject, getProperties, getProperty, has, isNew, parseObject, parseObject, reload, removeProperty, requires, rescanned, setObject, setProperties, setProperty, stringProperties

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface stella.sensor.Cumulating

cumulateOne, getLastRaw, getLastTime, getMaxSize, getSize, getTimeOfRead, regetRaw

Methods inherited from interface util.rmi.RmiCaster

bindToRegistry, isValid, unbindFromRegistry

Methods inherited from interface util.PropertySupplying

defaultBoolean, defaultChar, defaultDouble, defaultFloat, defaultInt, defaultLong, defaultObject, defaultObject, defaultProperties, defaultProperty, getAsBoolean, getAsChar, getAsDouble, getAsFloat, getAsInt, getAsList, getAsLong, getAsMap, getAsObject, getAsObject, getProperties, getProperty, has, parseObject, removeProperty, setObject, setProperty, stringProperties

Field Detail

KEY_MINPERIOD

public static final String KEY_MINPERIOD

The key to minimum weather period.

See Also:

Constant Field Values

KEY_MAXPERIOD

public static final String KEY_MAXPERIOD

The key to maximum weather period.

See Also:

Constant Field Values

KEY_GOODPERIOD

public static final String KEY_GOODPERIOD

The key to standard good weather period.

See Also:

Constant Field Values

KEY_BADPERIOD

public static final String KEY_BADPERIOD

The key to standard bad weather period.

See Also:

Constant Field Values

KEY_BADFRACTION

public static final String KEY_BADFRACTION

The key to standard bad weather fraction.

See Also:

Constant Field Values

KEY_GAUSSSIGMA

public static final String KEY_GAUSSSIGMA

The key to the standard deviation of the weather periods.

See Also:

Constant Field Values

KEY_GOODREADING

public static final String KEY_GOODREADING

The key to standard good reading.

See Also:

Constant Field Values

KEY_BADREADING

public static final String KEY_BADREADING

The key to standard bad reading.

See Also:

Constant Field Values

KEY_TIME

public static final String KEY_TIME

The key giving the name of the time parameter.

See Also:

Constant Field Values

DEFMINPERIOD

private static final long DEFMINPERIOD

The default minimum period.

See Also:

Constant Field Values

DEFMAXPERIOD

private static final long DEFMAXPERIOD

The default maximum period.

See Also:

Constant Field Values

DEFGOODPERIOD

private static final long DEFGOODPERIOD

The default good weather period.

See Also:

Constant Field Values

DEFBADPERIOD

private static final long DEFBADPERIOD

The default bad weather period.

See Also:

Constant Field Values

DEFBADFRACTION

private static final double DEFBADFRACTION

The default bad weather period.

See Also:

Constant Field Values

DEFGAUSSSIGMA

private static final double DEFGAUSSSIGMA

The default sigma.

See Also:

Constant Field Values

DEFGOODREADING

private static final double DEFGOODREADING

The default good reading.

See Also:

Constant Field Values

DEFBADREADING

private static final double DEFBADREADING

The default good reading.

See Also:

Constant Field Values

DEFTIME

private static final String DEFTIME

The default time parameter.

See Also:

Constant Field Values

goodcount

private long goodcount

Cumulated good period.

badcount

private long badcount

Cumulated bad period.

period

private long period

Current active period.

weather

private boolean weather

Current active weather.

toggled

private long toggled

Last time of weather change.

time

private CurrentTime time

A special time grabbed from the parameter cluster.

random

private static Random random

My random number generator.

Constructor Detail

BadSensor

public BadSensor(Map prop)
          throws RemoteException

Constructs a new fake sensor. The file found in in the properties is also opened here.

Throws:

RemoteException

Method Detail

initSensorTimerTask

public TimerTask initSensorTimerTask()

Starts the sensor. If we have a time parameter, we use this, otherwise system time is used. Here we start with a good weather period.

Specified by:

initSensorTimerTask in interface Telemetering

Overrides:

initSensorTimerTask in class TimerTaskSensor

Returns:

The ready-to-start timer-task of this sensor.

See Also:

Telemetering.getRespawn()

registerParameter

public void registerParameter(Parameter systime)

If we have a time, use it.

Specified by:

registerParameter in interface ParameterDepending

validReading

public boolean validReading()

A bad sensor is always valid.

Specified by:

validReading in interface Telemetering

readSensor

protected double readSensor()

Returns the current weather depending reading. If the weather should change, we calculate the accumulated fraction of good and bad weather times and may toggle the weather to a new value.

Specified by:

readSensor in class TimerTaskSensor

See Also:

ConvertToPhysical

getWeatherPeriod

private long getWeatherPeriod(long stdperiod,
                              double sigma)

Returns a new weather period. It delivers a gaussian distribution spread around the first argument with a sigma of the second argument.