/**
* Copyright (c) 2011, SOCIETIES Consortium (WATERFORD INSTITUTE OF TECHNOLOGY (TSSG), HERIOT-WATT UNIVERSITY (HWU), SOLUTA.NET
* (SN), GERMAN AEROSPACE CENTRE (Deutsches Zentrum fuer Luft- und Raumfahrt e.V.) (DLR), Zavod za varnostne tehnologije
* informacijske družbe in elektronsko poslovanje (SETCCE), INSTITUTE OF COMMUNICATION AND COMPUTER SYSTEMS (ICCS), LAKE
* COMMUNICATIONS (LAKE), INTEL PERFORMANCE LEARNING SOLUTIONS LTD (INTEL), PORTUGAL TELECOM INOVAÇÃO, SA (PTIN), IBM Corp.,
* INSTITUT TELECOM (ITSUD), AMITEC DIACHYTI EFYIA PLIROFORIKI KAI EPIKINONIES ETERIA PERIORISMENIS EFTHINIS (AMITEC), TELECOM
* ITALIA S.p.a.(TI), TRIALOG (TRIALOG), Stiftelsen SINTEF (SINTEF), NEC EUROPE LTD (NEC))
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
* SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.societies.privacytrust.privacyprotection.privacypreferencemanager.evaluation;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.concurrent.ExecutionException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.societies.api.context.CtxException;
import org.societies.api.context.event.CtxChangeEvent;
import org.societies.api.context.event.CtxChangeEventListener;
import org.societies.api.context.model.CtxAttribute;
import org.societies.api.context.model.CtxAttributeIdentifier;
import org.societies.api.context.model.CtxIdentifier;
import org.societies.api.internal.context.broker.ICtxBroker;
import org.societies.privacytrust.privacyprotection.privacypreferencemanager.monitoring.IMonitor;
public class ContextCacheUpdater /*extends EventListener*/ implements CtxChangeEventListener{
private ICtxBroker ctxBroker;
private Logger logging = LoggerFactory.getLogger(this.getClass());
private PrivateContextCache contextCache;
private ArrayList<CtxAttributeIdentifier> attrList;
private Hashtable<CtxIdentifier, ArrayList<IMonitor>> clients;
public ContextCacheUpdater(ICtxBroker broker, PrivateContextCache cache){
this.ctxBroker = broker;
this.contextCache = cache;
this.attrList = new ArrayList<CtxAttributeIdentifier>();
this.clients = new Hashtable<CtxIdentifier, ArrayList<IMonitor>>();
}
public void registerForContextEvent(CtxAttributeIdentifier id){
if (this.attrList.contains(id)){
this.logging.debug("Already Registered for context events for : "+id.getType()+" ID: "+id.toUriString());
return;
}
try {
//this.broker.registerUpdateNotification(this, id);
this.ctxBroker.registerForChanges(this, id);
this.logging.debug("Registered for context events for : "+id.getType()+" ID: "+id.toUriString());
} catch (CtxException e) {
this.logging.debug("Unable to register for context events for : "+id.getType()+" ID: "+id.toUriString());
e.printStackTrace();
}
}
private boolean isMonitorRegistered(CtxIdentifier id, IMonitor client){
if (this.clients.containsKey(id)){
ArrayList<IMonitor> monitors = this.clients.get(id);
for (IMonitor monitor : monitors){
if (monitor.getMonitorID().equalsIgnoreCase(client.getMonitorID())){
return true;
}
}
}
return false;
}
public void registerForContextEvent(CtxAttributeIdentifier id, IMonitor client){
if (this.clients.containsKey(id)){
if (!this.isMonitorRegistered(id, client)){
this.clients.get(id).add(client);
}
}else{
ArrayList<IMonitor> monitorList = new ArrayList<IMonitor>();
monitorList.add(client);
this.clients.put(id, monitorList);
}
if (this.attrList.contains(id)){
this.logging.debug("Already Registered for context events for : "+id.getType()+" ID: "+id.toUriString());
return;
}
try {
//this.broker.registerUpdateNotification(this, id);
this.ctxBroker.registerForChanges(this, id);
this.logging.debug("Registered for context events for : "+id.getType()+" ID: "+id.toUriString());
} catch (CtxException e) {
this.logging.debug("Unable to register for context events for : "+id.getType()+" ID: "+id.toUriString());
e.printStackTrace();
}
}
/* @Override
public void handlePSSEvent(PSSEvent arg0) {
// nothing to do. Context Events are only sent as Peer Events
}
@Override
public void handlePeerEvent(PeerEvent event) {
try{
this.logging.debug("Peer Event Received " + event.geteventType());
if (event.geteventType().equals(PSSEventTypes.CONTEXT_UPDATE_EVENT)){
ICtxAttribute ctxAttr = (ICtxAttribute) event.geteventInfo();
String type = ctxAttr.getType();
String value = ctxAttr.getStringValue();
ICtxIdentifier id = ctxAttr.getCtxIdentifier();
this.logging.debug("Event received: type: "+type+" value: "+value);
this.contextCache.updateCache(ctxAttr);
}
}catch(Exception e){
e.printStackTrace();
}
}*/
@Override
public void onCreation(CtxChangeEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void onModification(CtxChangeEvent event) {
CtxIdentifier ctxId = event.getId();
try {
CtxAttribute ctxAttr = (CtxAttribute) ctxBroker.retrieve(ctxId).get();
if (ctxAttr!=null){
String type = ctxAttr.getType();
String value = ctxAttr.getStringValue();
this.logging.debug("Event received: type: "+type+" value: "+value);
this.contextCache.updateCache(ctxAttr);
if (this.clients.containsKey(ctxId)){
ArrayList<IMonitor> arrayList = this.clients.get(ctxId);
for (IMonitor monitor : arrayList){
monitor.onModification(event);
}
}
}
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ExecutionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (CtxException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public void onRemoval(CtxChangeEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void onUpdate(CtxChangeEvent arg0) {
// TODO Auto-generated method stub
}
}