/**
* 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.trust.impl.evidence;
import java.io.Serializable;
import java.util.Date;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.societies.api.identity.Requestor;
import org.societies.api.internal.privacytrust.trust.evidence.ITrustEvidenceCollector;
import org.societies.api.osgi.event.CSSEvent;
import org.societies.api.osgi.event.EventListener;
import org.societies.api.osgi.event.EventTypes;
import org.societies.api.osgi.event.IEventMgr;
import org.societies.api.osgi.event.InternalEvent;
import org.societies.api.privacytrust.trust.TrustException;
import org.societies.api.privacytrust.trust.evidence.TrustEvidenceType;
import org.societies.api.privacytrust.trust.model.TrustEvidence;
import org.societies.api.privacytrust.trust.model.TrustedEntityId;
import org.societies.privacytrust.trust.api.ITrustNodeMgr;
import org.societies.privacytrust.trust.api.evidence.remote.ITrustEvidenceCollectorRemoteClient;
import org.societies.privacytrust.trust.api.evidence.remote.ITrustEvidenceCollectorRemoteClientCallback;
import org.societies.privacytrust.trust.api.evidence.repo.ITrustEvidenceRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.osgi.service.ServiceUnavailableException;
import org.springframework.stereotype.Service;
/**
* Describe your class here...
*
* @author <a href="mailto:nicolas.liampotis@cn.ntua.gr">Nicolas Liampotis</a> (ICCS)
* @since 0.2
*/
@Service
public class InternalTrustEvidenceCollector implements ITrustEvidenceCollector {
/** The logging facility. */
private static final Logger LOG = LoggerFactory.getLogger(InternalTrustEvidenceCollector.class);
/** The Trust Mgr service reference. */
@Autowired(required=true)
private ITrustNodeMgr trustNodeMgr;
/** The Trust Evidence Repository service reference. */
@Autowired(required=false)
private ITrustEvidenceRepository trustEvidenceRepository;
/** The internal Trust Evidence Collector Client service reference. */
@Autowired(required=false)
private ITrustEvidenceCollectorRemoteClient trustEvidenceCollectorRemoteClient;
@Autowired(required=true)
InternalTrustEvidenceCollector(IEventMgr eventMgr) throws Exception {
LOG.info("{} instantiated", this.getClass());
try {
LOG.info("Registering for trust evidence events...");
eventMgr.subscribeInternalEvent(new TrustEvidenceEventListener(),
new String[] { EventTypes.TRUST_EVIDENCE_EVENT }, null);
} catch (Exception e) {
LOG.error(this.getClass() + " could not be initialised: "
+ e.getLocalizedMessage(), e);
throw e;
}
}
/*
* @see org.societies.api.privacytrust.trust.evidence.ITrustEvidenceCollector#addDirectEvidence(org.societies.api.identity.Requestor, org.societies.api.privacytrust.trust.model.TrustedEntityId, org.societies.api.privacytrust.trust.model.TrustedEntityId, org.societies.api.privacytrust.trust.evidence.TrustEvidenceType, java.util.Date, java.io.Serializable)
*/
@Override
public void addDirectEvidence(final Requestor requestor,
final TrustedEntityId subjectId, final TrustedEntityId objectId,
final TrustEvidenceType type, final Date timestamp,
final Serializable info) throws TrustException {
if (requestor == null)
throw new NullPointerException("requestor can't be null");
if (subjectId == null)
throw new NullPointerException("subjectId can't be null");
if (objectId == null)
throw new NullPointerException("objectId can't be null");
if (type == null)
throw new NullPointerException("type can't be null");
if (timestamp == null)
throw new NullPointerException("timestamp can't be null");
this.doAddEvidence(requestor, subjectId, objectId, type,
timestamp, info, null);
}
/*
* @see org.societies.api.internal.privacytrust.trust.evidence.ITrustEvidenceCollector#addDirectEvidence(org.societies.api.privacytrust.trust.model.TrustedEntityId, org.societies.api.privacytrust.trust.model.TrustedEntityId, org.societies.api.privacytrust.trust.evidence.TrustEvidenceType, java.util.Date, java.io.Serializable)
*/
@Override
public void addDirectEvidence(final TrustedEntityId subjectId,
final TrustedEntityId objectId, final TrustEvidenceType type,
final Date timestamp, final Serializable info)
throws TrustException {
if (subjectId == null)
throw new NullPointerException("subjectId can't be null");
if (objectId == null)
throw new NullPointerException("objectId can't be null");
if (type == null)
throw new NullPointerException("type can't be null");
if (timestamp == null)
throw new NullPointerException("timestamp can't be null");
this.doAddEvidence(null, subjectId, objectId, type, timestamp,
info, null);
}
/*
* @see org.societies.api.privacytrust.trust.evidence.ITrustEvidenceCollector#addIndirectEvidence(org.societies.api.identity.Requestor, org.societies.api.privacytrust.trust.model.TrustedEntityId, org.societies.api.privacytrust.trust.model.TrustedEntityId, org.societies.api.privacytrust.trust.evidence.TrustEvidenceType, java.util.Date, java.io.Serializable, org.societies.api.privacytrust.trust.model.TrustedEntityId)
*/
@Override
public void addIndirectEvidence(final Requestor requestor,
final TrustedEntityId subjectId, final TrustedEntityId objectId,
final TrustEvidenceType type, final Date timestamp,
final Serializable info, final TrustedEntityId sourceId)
throws TrustException {
if (requestor == null)
throw new NullPointerException("requestor can't be null");
if (subjectId == null)
throw new NullPointerException("subjectId can't be null");
if (objectId == null)
throw new NullPointerException("objectId can't be null");
if (type == null)
throw new NullPointerException("type can't be null");
if (timestamp == null)
throw new NullPointerException("timestamp can't be null");
if (sourceId == null)
throw new NullPointerException("sourceId can't be null");
this.doAddEvidence(requestor, subjectId, objectId, type,
timestamp, info, sourceId);
}
/*
* @see org.societies.api.internal.privacytrust.trust.evidence.ITrustEvidenceCollector#addIndirectEvidence(org.societies.api.privacytrust.trust.model.TrustedEntityId, org.societies.api.privacytrust.trust.model.TrustedEntityId, org.societies.api.privacytrust.trust.evidence.TrustEvidenceType, java.util.Date, java.io.Serializable, org.societies.api.privacytrust.trust.model.TrustedEntityId)
*/
@Override
public void addIndirectEvidence(final TrustedEntityId subjectId,
final TrustedEntityId objectId, final TrustEvidenceType type,
final Date timestamp, final Serializable info,
final TrustedEntityId sourceId) throws TrustException {
if (subjectId == null)
throw new NullPointerException("subjectId can't be null");
if (objectId == null)
throw new NullPointerException("objectId can't be null");
if (type == null)
throw new NullPointerException("type can't be null");
if (timestamp == null)
throw new NullPointerException("timestamp can't be null");
this.doAddEvidence(null, subjectId, objectId, type, timestamp,
info, sourceId);
}
private void doAddEvidence(Requestor requestor,
final TrustedEntityId subjectId, final TrustedEntityId objectId,
final TrustEvidenceType type, final Date timestamp,
final Serializable info, final TrustedEntityId sourceId)
throws TrustException {
if (requestor == null)
requestor = this.trustNodeMgr.getLocalRequestor();
LOG.debug("Adding trust evidence with subjectId '{}'"
+ ", objectId '{}', type '{}', timestamp '{}'"
+ ", info '{}' and sourceId '{}'"
+ "' on behalf of requestor '{}'", new Object[] {
subjectId, objectId, type, timestamp, info, sourceId, requestor });
try {
final boolean doLocal = this.trustNodeMgr.isMaster();
LOG.debug("doLocal is {}", doLocal);
if (doLocal) {
if (this.trustEvidenceRepository == null)
throw new TrustEvidenceCollectorException(
"ITrustEvidenceRepository service is not available");
this.trustEvidenceRepository.addEvidence(
subjectId, objectId, type, timestamp, info, sourceId);
} else {
final TrustEvidenceCollectorRemoteCallback callback =
new TrustEvidenceCollectorRemoteCallback();
if (this.trustEvidenceCollectorRemoteClient == null)
throw new TrustEvidenceCollectorException(
"ITrustEvidenceCollectorRemote service is not available");
this.trustEvidenceCollectorRemoteClient.addIndirectEvidence(
requestor, subjectId, objectId, type, timestamp, info,
sourceId, callback);
synchronized (callback) {
try {
callback.wait();
if (callback.getException() != null)
throw callback.getException();
} catch (InterruptedException ie) {
throw new TrustEvidenceCollectorException(
"Interrupted while adding indirect trust evidence with subjectId '"
+ subjectId + "', objectId '" + objectId
+ "', type '" + type + "', timestamp '"
+ timestamp + "', info '" + info
+ "' and sourceId '" + sourceId
+ "' on behalf of requestor '" + requestor + "'");
}
}
}
} catch (ServiceUnavailableException sue) {
throw new TrustEvidenceCollectorException(
sue.getLocalizedMessage(), sue);
}
}
private class TrustEvidenceCollectorRemoteCallback
implements ITrustEvidenceCollectorRemoteClientCallback {
private TrustException trustException;
/*
* @see org.societies.privacytrust.trust.api.evidence.remote.ITrustEvidenceCollectorRemoteClientCallback#onAddedDirectEvidence()
*/
@Override
public void onAddedDirectEvidence() {
synchronized (this) {
notifyAll();
}
}
/*
* @see org.societies.privacytrust.trust.api.evidence.remote.ITrustEvidenceCollectorRemoteClientCallback#onAddedIndirectEvidence()
*/
@Override
public void onAddedIndirectEvidence() {
synchronized (this) {
notifyAll();
}
}
/*
* @see org.societies.privacytrust.trust.api.evidence.remote.ITrustEvidenceCollectorRemoteClientCallback#onException(org.societies.api.privacytrust.trust.TrustException)
*/
@Override
public void onException(TrustException trustException) {
this.trustException = trustException;
synchronized (this) {
notifyAll();
}
}
private TrustException getException() {
return this.trustException;
}
}
private class TrustEvidenceEventListener extends EventListener {
/*
* @see org.societies.api.osgi.event.EventListener#handleExternalEvent(org.societies.api.osgi.event.CSSEvent)
*/
@Override
public void handleExternalEvent(CSSEvent event) {
LOG.warn("Received unexpected external event {}", event);
}
/*
* @see org.societies.api.osgi.event.EventListener#handleInternalEvent(org.societies.api.osgi.event.InternalEvent)
*/
@Override
public void handleInternalEvent(InternalEvent event) {
LOG.debug("Received internal event {}", event);
if (!(event.geteventInfo() instanceof TrustEvidence)) {
LOG.error("Could not handle internal '" + event.geteventType() + "'"
+ "event: Expected event info of type "
+ TrustEvidence.class + " but was " + event.geteventInfo());
return;
}
final TrustEvidence evidence = (TrustEvidence) event.geteventInfo();
final Requestor requestor = trustNodeMgr.getLocalRequestor();
try {
doAddEvidence(requestor, evidence.getSubjectId(),
evidence.getObjectId(), evidence.getType(),
evidence.getTimestamp(), evidence.getInfo(),
evidence.getSourceId());
} catch (Exception e) {
LOG.error("Could not add trust evidence '"
+ evidence + "': " + e.getLocalizedMessage(), e);
}
}
}
}