org.vrspace.server
Class OwnedDBObject

java.lang.Object
  java.util.Observable
      org.vrspace.server.VRObject
          org.vrspace.server.DBObject
              org.vrspace.server.PublicDBObject
                  org.vrspace.server.OwnedDBObject

All Implemented Interfaces:

java.lang.Cloneable, Owned

Direct Known Subclasses:

AuthInfo, Chatroom, Client, File, Item, James, Jetty, JMF, JXTA, Site, Tomcat, Transform

public class OwnedDBObject

extends PublicDBObject

implements Owned

Forwards events to all the listeners, but receives events only from owners.

Field Summary

Fields inherited from class org.vrspace.server.DBObject

db

Fields inherited from class org.vrspace.server.VRObject

db_id, primitiveMap, primitives

Constructor Summary

OwnedDBObject()

Method Summary

void	addOwner(Owner c) Interface Owned
boolean	isOwned(Owner c) Interface Owned
void	notifyOwners(java.lang.Object o) Interface Owned
void	ownershipRequired(Request r) Called from sendEvent( request ) in case request comes from non-owner.
void	processEvent(Request r) Process a request.
void	removeOwner(Owner c) Interface Owned
void	sendEvent(Request r) Forwards request r to other clients, listeners added by Dispatcher.

Methods inherited from class org.vrspace.server.PublicDBObject

setValue

Methods inherited from class org.vrspace.server.DBObject

delete, get, put, put

Methods inherited from class org.vrspace.server.VRObject

arrayToString, canRead, canWrite, clone, equals, fieldToText, fromString, fromText, getClassName, getField, getFields, getId, getID, getMemebers, hasField, hasMethod, isNew, newInstance, sendResponse, setField, setField, setField, setFields, setFields, stringToArray, toString, toText, toText, toText

Methods inherited from class java.util.Observable

addObserver, clearChanged, countObservers, deleteObserver, deleteObservers, hasChanged, notifyObservers, notifyObservers, setChanged

Methods inherited from class java.lang.Object

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

Constructor Detail

OwnedDBObject

public OwnedDBObject()

Method Detail

sendEvent

public void sendEvent(Request r)
               throws RequestException

Forwards request r to other clients, listeners added by Dispatcher. Throws RequestException if request target is another object, or if event source is not in it's owners list.

Overrides:

sendEvent in class DBObject

Throws:

RequestException

ownershipRequired

public void ownershipRequired(Request r)
                       throws RequestException

Called from sendEvent( request ) in case request comes from non-owner. Intended for subclases. This implementation throws RequestException. NOTE: in order distribute this request further you need to processEvent( r );

Throws:

RequestException

processEvent

public void processEvent(Request r)
                  throws RequestException

Process a request. Called from sendEvent if request comes from owner. Intedend for use by sublcasses, utility function.

Throws:

RequestException

addOwner

public void addOwner(Owner c)

Interface Owned

Specified by:

addOwner in interface Owned

removeOwner

public void removeOwner(Owner c)

Interface Owned

Specified by:

removeOwner in interface Owned

isOwned

public boolean isOwned(Owner c)

Interface Owned

Specified by:

isOwned in interface Owned

notifyOwners

public void notifyOwners(java.lang.Object o)

Interface Owned

Specified by:

notifyOwners in interface Owned