/**
* 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.context.activity.impl;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.societies.api.activity.IActivity;
import org.societies.api.activity.IActivityFeed;
import org.societies.api.activity.IActivityFeedManager;
import org.societies.api.comm.xmpp.interfaces.ICommManager;
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.CtxEntityIdentifier;
import org.societies.api.internal.context.broker.ICtxBroker;
import org.societies.api.internal.context.model.CtxAttributeTypes;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Lazy;
import org.springframework.stereotype.Service;
/**
* This class is used to update user/community context based on CSS/CIS related
* events (e.g. new CSS connections, CIS membership changes, etc).
*
* @author <a href="mailto:nicolas.liampotis@cn.ntua.gr">Nicolas Liampotis</a> (ICCS)
* @since 1.0
*/
@Service
@Lazy(false)
public class CtxActivityFeed {
/** The logging facility. */
private static final Logger LOG = LoggerFactory.getLogger(CtxActivityFeed.class);
private static final List<String> CONTEXT_TYPES = Collections.unmodifiableList(
Arrays.asList(CtxAttributeTypes.LOCATION_SYMBOLIC));
/** The internal Context Broker service. */
private ICtxBroker ctxBroker;
/** The CSS activity feed. */
private IActivityFeed cssActivityFeed;
private final String cssActivityFeedId;
@Autowired(required=true)
CtxActivityFeed(ICtxBroker ctxBroker,
IActivityFeedManager activityFeedMgr,
ICommManager commMgr) throws Exception {
if (LOG.isInfoEnabled())
LOG.info(this.getClass() + " instantiated");
this.ctxBroker = ctxBroker;
try {
if (LOG.isInfoEnabled())
LOG.info("Obtaining reference to CSS Activity Feed");
this.cssActivityFeedId = commMgr.getIdManager().getThisNetworkNode().toString();
this.cssActivityFeed = activityFeedMgr.getOrCreateFeed(
cssActivityFeedId, cssActivityFeedId, false);
final CtxEntityIdentifier cssOwnerEntId = ctxBroker.retrieveIndividualEntity(
commMgr.getIdManager().getCloudNode()).get().getId();
if (LOG.isInfoEnabled())
LOG.info("Registering CSS context change listener for types '" + CONTEXT_TYPES + "'");
// Specify null attribute type to catch *all* attribute changes under the
// CSS owner entity
ctxBroker.registerForChanges(new CssCtxChangeListener(), cssOwnerEntId, null);
} catch (Exception e) {
LOG.error("Could not instantiate " + this.getClass()
+ "': " + e.getLocalizedMessage(), e);
throw e;
}
}
private class CssCtxChangeListener implements CtxChangeEventListener {
/*
* @see org.societies.api.context.event.CtxChangeEventListener#onCreation(org.societies.api.context.event.CtxChangeEvent)
*/
@Override
public void onCreation(CtxChangeEvent event) {
if (LOG.isTraceEnabled())
LOG.trace("Received CREATED event " + event);
}
/*
* @see org.societies.api.context.event.CtxChangeEventListener#onModification(org.societies.api.context.event.CtxChangeEvent)
*/
@Override
public void onModification(CtxChangeEvent event) {
if (LOG.isTraceEnabled())
LOG.trace("Received MODIFIED event " + event);
if (!(event.getId() instanceof CtxAttributeIdentifier)) {
LOG.error("Received unexpected event for object '" + event.getId()
+ "': Not a context attribute!");
return;
}
final CtxAttributeIdentifier attrId = (CtxAttributeIdentifier) event.getId();
if (CONTEXT_TYPES.contains(attrId.getType())) {
try {
final String activity;
final CtxAttribute attr = (CtxAttribute) ctxBroker.retrieve(attrId).get();
if (CtxAttributeTypes.LOCATION_SYMBOLIC.equals(attr.getType())) {
activity = "User location changed to " + attr.getStringValue();
} else {
activity = attr.getType() + " changed to " + attr.getStringValue();
}
if (LOG.isDebugEnabled())
LOG.debug("Adding activity '" + activity + "'");
addCssActivity(activity);
} catch (Exception e) {
LOG.error("Failed to retrieve modified context attribute " + attrId
+ ": " + e.getLocalizedMessage(), e);
return;
}
} else {
if (LOG.isDebugEnabled())
LOG.debug("Ignoring event for context attribute of type " + attrId.getType());
}
}
/*
* @see org.societies.api.context.event.CtxChangeEventListener#onRemoval(org.societies.api.context.event.CtxChangeEvent)
*/
@Override
public void onRemoval(CtxChangeEvent event) {
if (LOG.isTraceEnabled())
LOG.trace("Received REMOVED event " + event);
}
/*
* @see org.societies.api.context.event.CtxChangeEventListener#onUpdate(org.societies.api.context.event.CtxChangeEvent)
*/
@Override
public void onUpdate(CtxChangeEvent event) {
if (LOG.isTraceEnabled())
LOG.trace("Received UPDATED event " + event);
}
}
private void addCssActivity(final String action){
final IActivity activity = this.cssActivityFeed.getEmptyIActivity();
activity.setActor(this.cssActivityFeedId);
activity.setObject(this.cssActivityFeedId);
activity.setVerb(action);
this.cssActivityFeed.addActivity(activity);
}
}