stella.sensor

Class SensorRepository

java.lang.Object

util.PropertyContainer

util.PropertyResources

util.rmi.RmiPropertyContainer

util.rmi.AbstractRmiCaster

stella.sensor.SensorRepository

All Implemented Interfaces:

Cloneable, Remote, EventListener, DataListener, RmiDataDepositing, RmiParameterClustering, ExitCleaning, Initializable, PropertySupplying, ResourceSupplying, RmiCaster, RmiPropertyBearing

public class SensorRepository
extends AbstractRmiCaster
implements RmiParameterClustering, RmiDataDepositing, Initializable, DataListener

This class acts as a repository for a whole bundle of sensor values. It has to have local access to the sensors, thus it must be started within the same virtual machine as the sensors it monitors, thus it will be started from within a weather station.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	SensorRepository.Averager This class collects all data events generated during the averaging interval.

Nested classes/interfaces inherited from class util.PropertyResources

PropertyResources.Load, PropertyResources.URLResource

Field Summary

Fields

Modifier and Type	Field and Description
private Map<String,List<DataEvent>>	average The hash map used for buffering the data events.
private SensorRepository.Averager	averagethread The average thread for notification of data listeners.
private List<Object>	collect The data-collector classes to use for processing the averages.
private static boolean	DEFBIND The default auto-binding.
static String	DEFBINDNAME The default binding name.
static long	DEFTIMERINTERVAL The default sampling intervall.
private boolean	isScheduled Averager scheduling may not start before the first data event.
static String	KEY_BIND The referring to auto-binding of the sensor repository.
static String	KEY_DATACOLLECTOR The key linked to the properties of the data collector class.
static String	KEY_IGNORE The key linked to the sensor that should not be monitored.
static String	KEY_TIMERINTERVAL The key linked to the scheduling intervall of the timer, in ms.
private Shelf<Map<String,DataEvent>>	longterm Stores a number of averaged data events mappings.
private Map<String,DataEvent>	lookup The look-up table matching sensor names to actual data events.
private Timer	schedule The timer class used for scheduling the data collector.
private WeatherSurveying	station A reference to the weather station for deregistering on exit.
private Map<String,Boolean>	valid The last data event received was valid.

Fields inherited from class util.rmi.AbstractRmiCaster

ALTERNATEHOST, ALTERNATEPORT, KEY_BINDNAME, 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.RmiDataDepositing

NAMING_EXTENSION

Fields inherited from interface util.ResourceSupplying

KEY_URLRESOURCES, KEY_URLUSECONFIG, KEY_URLUSECURRENT, KEY_URLUSEHOME

Fields inherited from interface util.PropertySupplying

CONFIG, KEY_CLASS

Constructor Summary

Constructors

Constructor and Description
SensorRepository(Map<String,String> prop) Constructs a new readout-repository.

Method Summary

Modifier and Type	Method and Description
boolean	addRmiDataCollector(RmiDataCollecting rmicollect) Registers late-comming rmi data-collectors.
void	dataAvailable(DataEvent de) Receives an incoming DataEvent.
void	exit() Exits the read-out repository.
DataEvent	getActualData(String name) Returns the last data event received from the sensor with the given name.
long	getBaseInterval() For convenience, return the base timer interval.
void	init() Initializes the read-out repository.
protected void	initTimer(List<String> files) Initializes the timer class scheduler and the DataCollecting classes for use with this short-average repository.
boolean	isValidData(String name) Returns true, if the last data event received for the given sensor name was a valid one.
void	registerSensors(WeatherSurveying caller) Initalizes the repository sensors.
boolean	removeRmiDataCollector(RmiDataCollecting rmicollect) Deregisters an rmi data-collector.
void	rmiAddParameter(URL info) Throws an unsupported operation exception-sensors are read-only.
Object	rmiGet(String name) Returns the actual value of the stated sensor.
Set<String>	rmiGetAllParameterNames() Returns the names of all sensors observed by this repository as a set.
void	rmiRemoveParameter(String info) Throws an unsupported operation exception-sensors are read-only.
Object	rmiSet(String name, Object to) Throws an unsupported operation exception-sensors are read-only.
String	toString() Returns the list of served sensor names.

Methods inherited from class util.rmi.AbstractRmiCaster

bindToRegistry, bindToRegistry, bindToRegistry, bindToRegistry, bindToRegistry, bindToRegistry, casterExit, casterExit, getBindName, 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

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

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_IGNORE

public static final String KEY_IGNORE

The key linked to the sensor that should not be monitored.

See Also:

Constant Field Values

KEY_BIND

public static final String KEY_BIND

The referring to auto-binding of the sensor repository.

See Also:

Constant Field Values

KEY_DATACOLLECTOR

public static final String KEY_DATACOLLECTOR

The key linked to the properties of the data collector class.

See Also:

Constant Field Values

KEY_TIMERINTERVAL

public static final String KEY_TIMERINTERVAL

The key linked to the scheduling intervall of the timer, in ms.

See Also:

Constant Field Values

DEFBIND

private static final boolean DEFBIND

The default auto-binding.

See Also:

Constant Field Values

DEFBINDNAME

public static final String DEFBINDNAME

The default binding name.

See Also:

Constant Field Values

DEFTIMERINTERVAL

public static final long DEFTIMERINTERVAL

The default sampling intervall.

See Also:

Constant Field Values

station

private WeatherSurveying station

A reference to the weather station for deregistering on exit.

lookup

private Map<String,DataEvent> lookup

The look-up table matching sensor names to actual data events.

valid

private Map<String,Boolean> valid

The last data event received was valid.

average

private Map<String,List<DataEvent>> average

The hash map used for buffering the data events.

longterm

private Shelf<Map<String,DataEvent>> longterm

Stores a number of averaged data events mappings.

schedule

private Timer schedule

The timer class used for scheduling the data collector.

averagethread

private SensorRepository.Averager averagethread

The average thread for notification of data listeners.

isScheduled

private boolean isScheduled

Averager scheduling may not start before the first data event.

collect

private List<Object> collect

The data-collector classes to use for processing the averages.

Constructor Detail

SensorRepository

public SensorRepository(Map<String,String> prop)
                 throws RemoteException

Constructs a new readout-repository. Construction fails if neither of the two #KEY_LIST or the #KEY_FILE keys are given.
Prior to using the repository, the registerSensors(stella.sensor.WeatherSurveying) method must be called.

Throws:

RemoteException

Method Detail

init

public void init()

Initializes the read-out repository. This means binding it to the registry, if binding is intended via the (KEY_BIND key.

Specified by:

init in interface Initializable

exit

public void exit()

Exits the read-out repository. This means unbinding it from the registry, if binding is intended via the (KEY_BIND key.

Specified by:

exit in interface ExitCleaning

Overrides:

exit in class AbstractRmiCaster

registerSensors

public void registerSensors(WeatherSurveying caller)

Initalizes the repository sensors. This method is calls back the WeatherSurveying for its list of sensors and registers to all of them that are not explicetly forbidden in the KEY_IGNORE list.

dataAvailable

public void dataAvailable(DataEvent de)

Receives an incoming DataEvent. This data event is stored in the lookup-table, using its RmiEvent.getSourceName() method as a key.

Specified by:

dataAvailable in interface DataListener

getActualData

public DataEvent getActualData(String name)

Returns the last data event received from the sensor with the given name. If the name is not in the list, or no data has ever been received, this method returns null.

isValidData

public boolean isValidData(String name)

Returns true, if the last data event received for the given sensor name was a valid one.

getBaseInterval

public long getBaseInterval()

For convenience, return the base timer interval.

rmiGet

public Object rmiGet(String name)
              throws RemoteException

Returns the actual value of the stated sensor. If the data event linked to the stated sensor has an undefined RawDataEvent.getPhysical(), the sensor's raw data, as returned by the RawDataEvent.getRaw() method is returned.

Specified by:

rmiGet in interface RmiParameterClustering

Returns:

A Double object carrying the actual sensor data

Throws:

RemoteException

rmiSet

public Object rmiSet(String name,
                     Object to)
              throws RemoteException

Throws an unsupported operation exception-sensors are read-only.

Specified by:

rmiSet in interface RmiParameterClustering

Returns:

The old parameter value.

Throws:

RemoteException

rmiAddParameter

public void rmiAddParameter(URL info)
                     throws RemoteException

Throws an unsupported operation exception-sensors are read-only.

Specified by:

rmiAddParameter in interface RmiParameterClustering

Throws:

RemoteException

rmiRemoveParameter

public void rmiRemoveParameter(String info)
                        throws RemoteException

Throws an unsupported operation exception-sensors are read-only.

Specified by:

rmiRemoveParameter in interface RmiParameterClustering

Throws:

RemoteException

rmiGetAllParameterNames

public Set<String> rmiGetAllParameterNames()
                                    throws RemoteException

Returns the names of all sensors observed by this repository as a set. Note that only sensors that have already sent at least one data event are considered.

Specified by:

rmiGetAllParameterNames in interface RmiParameterClustering

Throws:

RemoteException

addRmiDataCollector

public boolean addRmiDataCollector(RmiDataCollecting rmicollect)
                            throws RemoteException

Registers late-comming rmi data-collectors. Additionally to adding the data collector to the repositories notification list, the rmimap is passed to the registering instance.

Specified by:

addRmiDataCollector in interface RmiDataDepositing

Returns:

True on success.

Throws:

RemoteException

removeRmiDataCollector

public boolean removeRmiDataCollector(RmiDataCollecting rmicollect)
                               throws RemoteException

Deregisters an rmi data-collector. Should be called by the data collector as it goes offline.

Specified by:

removeRmiDataCollector in interface RmiDataDepositing

Throws:

RemoteException

toString

public String toString()

Returns the list of served sensor names.

Overrides:

toString in class PropertyContainer

initTimer

protected void initTimer(List<String> files)

Initializes the timer class scheduler and the DataCollecting classes for use with this short-average repository. All valid data collectors (non-null returns from AbstractDataCollector.createDataCollector(java.util.Map<java.lang.String, java.lang.String>)) are than servered within one timer task. Note that it is not possible to use one short-average repository with different averaging intervalls, but the registered listeners can define different multiples of the base interval.