stella.sensor
Class AbstractDataCollector

java.lang.Object
  util.PropertyContainer
      stella.sensor.AbstractDataCollector

All Implemented Interfaces:

Cloneable, DataCollecting, Initializable, PropertyBearing

Direct Known Subclasses:

DatabaseCurrent, FileCurrent

public abstract class AbstractDataCollector
extends PropertyContainer
implements DataCollecting

An abstract implementation of the DataCollecting interface. It provides (protected) construction with a single properties argument and may thus be used as a progenitor for local data collectors. The static method createDataCollector(java.util.Map) to create DataCollecting or RmiDataCollecting instances out of property files returns an object which may be cast to the appropriate type.

Nested Class Summary

Nested classes/interfaces inherited from class util.PropertyContainer

PropertyContainer.URLResource

Field Summary

static String	KEY_CLASS The key mapping to the data collector class name.
static String	KEY_INTERVAL The key mapping to the notification interval.
static String	KEY_RMIDATACOLLECT The key mapping to the remote data collector bind name.

Fields inherited from class util.PropertyContainer

KEY_LISTSEPARATOR, KEY_LOCALECOUNTRY, KEY_LOCALELANGUAGE, KEY_MAPKEYVALUECHAR, KEY_MAPSEPARATOR, KEY_NOINITONCREATE, KEY_RESOURCEBUNDLES

Fields inherited from interface util.PropertyBearing

CONFIG, KEY_URLRESOURCES, KEY_URLUSECONFIG, KEY_URLUSECURRENT, KEY_URLUSEHOME

Constructor Summary

protected

AbstractDataCollector(Map prop) Constructs a new data collector with the specified properties.

Method Summary

static Object	createDataCollector(Map prop) Constructs a new data collector instance using the mapping of the KEY_CLASS to the class name to derive the class to instantiate.
private static RmiDataCollecting	createRmiDataCollector(Map pr) Returns a remote-enabled data collector instance.

Methods inherited from class util.PropertyContainer

augment, augment, augment, clone, createFrom, createFrom, createFrom, defaultBoolean, defaultChar, defaultDouble, defaultFloat, defaultInt, defaultLong, defaultObject, defaultObject, defaultProperties, defaultProperty, getAsBoolean, getAsChar, getAsDouble, getAsEnums, getAsFloat, getAsInt, getAsList, getAsLong, getAsMap, getAsMap, getAsObject, getAsObject, getLocalClassLoader, getLocalized, getLocalized, getLocalizedString, getLocalizedString, getProperties, getPropertiesToKey, getPropertiesToKey, getProperty, getResource, getResourceAsStream, getResourceFromKey, getResources, has, init, isNew, keyCreate, keyCreate, parseObject, reload, reload, removeProperty, rescanned, setObject, setProperties, setProperty, stringProperties, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface stella.sensor.DataCollecting

getInterval, processData

Field Detail

KEY_CLASS

public static final String KEY_CLASS

The key mapping to the data collector class name.

See Also:

Constant Field Values

KEY_RMIDATACOLLECT

public static final String KEY_RMIDATACOLLECT

The key mapping to the remote data collector bind name.

See Also:

Constant Field Values

KEY_INTERVAL

public static final String KEY_INTERVAL

The key mapping to the notification interval.

See Also:

Constant Field Values

Constructor Detail

AbstractDataCollector

protected AbstractDataCollector(Map prop)

Constructs a new data collector with the specified properties.

Method Detail

createDataCollector

public static final Object createDataCollector(Map prop)

Constructs a new data collector instance using the mapping of the KEY_CLASS to the class name to derive the class to instantiate. If this property is defined, a new DataCollecting instance with the stated class name is created, the supplied properties used as an argument in the constructor.
Remote instances of a data collector are characterized by the presence of the KEY_RMIDATACOLLECT key. In this case, the data collector is not constructed but rather looked up in the registry. The remote reference found is returned as an RmiDataCollecting instance.

If unsuccessful due to various pits prtesent, null is returned.

Returns:

An object that is either a DataCollecting or a RmiDataCollecting instance.

createRmiDataCollector

private static final RmiDataCollecting createRmiDataCollector(Map pr)

Returns a remote-enabled data collector instance. Different to the createDataCollector(java.util.Map) method, this method does not construct a new object, but retrieves the instance of a registry-bound RmiDataCollecting object via a registry lookup.

Returns:

The stub-implementation of an rmi data collector.