/*
* Copyright (c) 2001-2007 Sun Microsystems, Inc. All rights reserved.
*
* The Sun Project JXTA(TM) Software License
*
* 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.
*
* 3. The end-user documentation included with the redistribution, if any, must
* include the following acknowledgment: "This product includes software
* developed by Sun Microsystems, Inc. for JXTA(TM) technology."
* Alternately, this acknowledgment may appear in the software itself, if
* and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
* not be used to endorse or promote products derived from this software
* without prior written permission. For written permission, please contact
* Project JXTA at http://www.jxta.org.
*
* 5. Products derived from this software may not be called "JXTA", nor may
* "JXTA" appear in their name, without prior written permission of Sun.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 SUN
* MICROSYSTEMS OR ITS 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.
*
* JXTA is a registered trademark of Sun Microsystems, Inc. in the United
* States and other countries.
*
* Please see the license information page at :
* <http://www.jxta.org/project/www/license.html> for instructions on use of
* the license in source files.
*
* ====================================================================
*
* This software consists of voluntary contributions made by many individuals
* on behalf of Project JXTA. For more information on Project JXTA, please see
* http://www.jxta.org.
*
* This license is based on the BSD license adopted by the Apache Foundation.
*/
package net.jxta.impl.rendezvous.edge;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Vector;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.logging.Level;
import java.util.logging.Logger;
import net.jxta.discovery.DiscoveryService;
import net.jxta.document.Advertisement;
import net.jxta.document.AdvertisementFactory;
import net.jxta.document.StructuredDocumentFactory;
import net.jxta.document.XMLDocument;
import net.jxta.endpoint.EndpointAddress;
import net.jxta.endpoint.Message;
import net.jxta.endpoint.MessageElement;
import net.jxta.endpoint.MessageTransport;
import net.jxta.endpoint.Messenger;
import net.jxta.endpoint.TextDocumentMessageElement;
import net.jxta.id.ID;
import net.jxta.id.IDFactory;
import net.jxta.impl.endpoint.relay.RelayReferralSeedingManager;
import net.jxta.impl.protocol.RdvConfigAdv;
import net.jxta.impl.rendezvous.PeerConnection;
import net.jxta.impl.rendezvous.RendezVousPropagateMessage;
import net.jxta.impl.rendezvous.RendezVousServiceImpl;
import net.jxta.impl.rendezvous.RendezVousServiceProvider;
import net.jxta.impl.rendezvous.StdRendezVousService;
import net.jxta.impl.rendezvous.rendezvousMeter.RendezvousConnectionMeter;
import net.jxta.impl.rendezvous.rendezvousMeter.RendezvousMeterBuildSettings;
import net.jxta.impl.rendezvous.rpv.PeerviewSeedingManager;
import net.jxta.impl.util.SeedingManager;
import net.jxta.impl.util.TimeUtils;
import net.jxta.impl.util.URISeedingManager;
import net.jxta.impl.util.threads.SelfCancellingTask;
import net.jxta.impl.util.threads.TaskManager;
import net.jxta.logging.Logging;
import net.jxta.peer.PeerID;
import net.jxta.peergroup.PeerGroup;
import net.jxta.peergroup.PeerGroupID;
import net.jxta.platform.Module;
import net.jxta.protocol.ConfigParams;
import net.jxta.protocol.PeerAdvertisement;
import net.jxta.protocol.RouteAdvertisement;
import net.jxta.rendezvous.RendezvousEvent;
/**
* A JXTA {@link net.jxta.rendezvous.RendezVousService} implementation which
* implements the client portion of the standard JXTA Rendezvous Protocol (RVP).
*
* @see net.jxta.rendezvous.RendezVousService
* @see <a href="https://jxta-spec.dev.java.net/nonav/JXTAProtocols.html#proto-rvp" target="_blank">JXTA Protocols Specification : Rendezvous Protocol</a>
*/
public class EdgePeerRdvService extends StdRendezVousService {
/**
* Logger
*/
private final static transient Logger LOG = Logger.getLogger(EdgePeerRdvService.class.getName());
/**
* Interval in milliseconds at which we will check our rendezvous connection.
*/
private final static long MONITOR_INTERVAL = 15 * TimeUtils.ASECOND;
/**
* Number of rendezvous we will try to connect to.
*/
private final int MAX_RDV_CONNECTIONS = 1;
/**
* The default amount of time we will attempt to renew a lease before it
* expires.
*/
private long LEASE_MARGIN = 5 * TimeUtils.AMINUTE;
/**
* Our source for rendezvous server seeds.
*/
private final SeedingManager seedingManager;
/**
* Our current seeds.
*/
private final List<RouteAdvertisement> seeds = new ArrayList<RouteAdvertisement>();
/**
* Our current connections with RendezVous peers.
*/
private final Map<ID, RdvConnection> rendezVous = Collections.synchronizedMap(new HashMap<ID, RdvConnection>());
private MonitorTask monitorTask;
/**
* Standard Constructor
*
* @param group Description of Parameter
* @param rdvService Description of Parameter
*/
public EdgePeerRdvService(PeerGroup group, RendezVousServiceImpl rdvService) {
super(group, rdvService);
Advertisement adv = null;
ConfigParams confAdv = group.getConfigAdvertisement();
// Get the config. If we do not have a config, we're done; we just keep
// the defaults (edge peer/no auto-rdv)
if (confAdv != null) {
adv = confAdv.getSvcConfigAdvertisement(rdvService.getAssignedID());
}
RdvConfigAdv rdvConfigAdv;
if (!(adv instanceof RdvConfigAdv)) {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("Creating new RdvConfigAdv for defaults.");
}
rdvConfigAdv = (RdvConfigAdv) AdvertisementFactory.newAdvertisement(RdvConfigAdv.getAdvertisementType());
} else {
rdvConfigAdv = (RdvConfigAdv) adv;
}
if (-1 != rdvConfigAdv.getMaxTTL()) {
MAX_TTL = rdvConfigAdv.getMaxTTL();
}
if (0 != rdvConfigAdv.getLeaseMargin()) {
LEASE_MARGIN = rdvConfigAdv.getLeaseMargin();
}
String serviceName = rdvService.getAssignedID().toString() + group.getPeerGroupID().getUniqueValue().toString();
if (PeerGroupID.worldPeerGroupID.equals(group.getParentGroup().getPeerGroupID())) {
URISeedingManager uriSeedingManager;
if (rdvConfigAdv.getProbeRelays()) {
uriSeedingManager = new RelayReferralSeedingManager(rdvConfigAdv.getAclUri(), rdvConfigAdv.getUseOnlySeeds(), group, serviceName);
} else {
uriSeedingManager = new URISeedingManager(rdvConfigAdv.getAclUri(), rdvConfigAdv.getUseOnlySeeds(), group, serviceName);
}
for (URI aSeeder : Arrays.asList(rdvConfigAdv.getSeedingURIs())) {
uriSeedingManager.addSeedingURI(aSeeder);
}
for (URI aSeed : Arrays.asList(rdvConfigAdv.getSeedRendezvous())) {
uriSeedingManager.addSeed(aSeed);
}
this.seedingManager = uriSeedingManager;
} else {
this.seedingManager = new PeerviewSeedingManager(rdvConfigAdv.getAclUri(), group, group.getParentGroup(), serviceName);
}
if (Logging.SHOW_INFO && LOG.isLoggable(Level.INFO)) {
LOG.info("RendezVous Service is initialized for " + group.getPeerGroupID() + " as an Edge peer.");
}
}
/**
* Listener for
* <p/>
* <assignedID>
*/
private class StdRdvEdgeProtocolListener implements StdRendezVousService.StdRdvProtocolListener {
/**
* {@inheritDoc}
*/
public void processIncomingMessage(Message msg, EndpointAddress srcAddr, EndpointAddress dstAddr) {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("[" + group.getPeerGroupID() + "] processing " + msg);
}
if ((msg.getMessageElement(RendezVousServiceProvider.RDV_MSG_NAMESPACE_NAME, ConnectedPeerReply) != null)
|| (msg.getMessageElement(RendezVousServiceProvider.RDV_MSG_NAMESPACE_NAME, ConnectedRdvAdvReply) != null)) {
processConnectedReply(msg);
}
if (msg.getMessageElement(RendezVousServiceProvider.RDV_MSG_NAMESPACE_NAME, DisconnectRequest) != null) {
processDisconnectRequest(msg);
}
}
}
/**
* {@inheritDoc}
*/
@Override
protected int startApp(String[] arg) {
super.startApp(arg, new StdRdvEdgeProtocolListener());
// The other services may not be fully functional but they're there
// so we can start our subsystems.
// As for us, it does not matter if our methods are called between init
// and startApp().
if (RendezvousMeterBuildSettings.RENDEZVOUS_METERING && (rendezvousMeter != null)) {
rendezvousMeter.startEdge();
}
rdvService.generateEvent(RendezvousEvent.BECAMEEDGE, group.getPeerID());
scheduleMonitor(0);
return Module.START_OK;
}
private void scheduleMonitor(long delayInMs) {
stopMonitor();
ScheduledExecutorService scheduledExecutor = TaskManager.getTaskManager().getScheduledExecutorService();
MonitorTask monitorTask = new MonitorTask();
monitorTask.setHandle(scheduledExecutor.scheduleAtFixedRate(monitorTask, delayInMs, MONITOR_INTERVAL, TimeUnit.MILLISECONDS));
}
private void stopMonitor() {
if(monitorTask != null) {
monitorTask.cancel();
}
}
/**
* {@inheritDoc}
*/
@Override
public synchronized void stopApp() {
if (closed) {
return;
}
closed = true;
seedingManager.stop();
disconnectFromAllRendezVous();
stopMonitor();
super.stopApp();
if (RendezvousMeterBuildSettings.RENDEZVOUS_METERING && (rendezvousMeter != null)) {
rendezvousMeter.stopEdge();
}
}
/**
* {@inheritDoc}
*/
@Override
public Vector<ID> getConnectedPeerIDs() {
return new Vector<ID>(rendezVous.keySet());
}
/**
* {@inheritDoc}
*/
@Override
public boolean isConnectedToRendezVous() {
return !rendezVous.isEmpty();
}
/**
* {@inheritDoc}
*/
@Override
public void connectToRendezVous(EndpointAddress addr, Object hint) {
if (seedingManager instanceof URISeedingManager) {
URISeedingManager uriseed = (URISeedingManager) seedingManager;
if (hint instanceof RouteAdvertisement) {
uriseed.addSeed((RouteAdvertisement) hint);
} else {
uriseed.addSeed(addr.toURI());
}
} else if (seedingManager instanceof PeerviewSeedingManager) {
PeerviewSeedingManager pvseed = (PeerviewSeedingManager) seedingManager;
if (hint instanceof RouteAdvertisement) {
pvseed.addSeed((RouteAdvertisement) hint);
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void challengeRendezVous(ID peerid, long delay) {
// If immediate failure is requested, just do it.
// {@code disconnectFromRendezVous()} will at least get the peer
// removed from the peerView, even if it is not currently a rendezvous
// of ours. That permits to purge from the peerview rdvs that we try
// and fail to connect to, faster than the background keep alive done
// by PeerView itself.
if (delay <= 0) {
removeRdv(peerid, false);
return;
}
RdvConnection pConn = rendezVous.get(peerid);
if (null != pConn) {
long adjusted_delay = Math.max(0, Math.min(TimeUtils.toRelativeTimeMillis(pConn.getLeaseEnd()), delay));
pConn.setLease(adjusted_delay, adjusted_delay);
}
}
/**
* {@inheritDoc}
*/
@Override
public void disconnectFromRendezVous(ID peerId) {
removeRdv(peerId, false);
}
/**
* {@inheritDoc}
*/
@Override
public void propagate(Message msg, String serviceName, String serviceParam, int initialTTL) throws IOException {
msg = msg.clone();
int useTTL = Math.min(initialTTL, MAX_TTL);
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("Propagating " + msg + "(TTL=" + useTTL + ") to :" + "\n\tsvc name:" + serviceName + "\tsvc params:"+ serviceParam);
}
RendezVousPropagateMessage propHdr = updatePropHeader(msg, getPropHeader(msg), serviceName, serviceParam, useTTL);
if (null != propHdr) {
sendToEachConnection(msg, propHdr);
sendToNetwork(msg, propHdr);
if (RendezvousMeterBuildSettings.RENDEZVOUS_METERING && (rendezvousMeter != null)) {
rendezvousMeter.propagateToGroup();
}
} else {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("Declining to propagate " + msg + " (No prop header)");
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void propagateInGroup(Message msg, String serviceName, String serviceParam, int initialTTL) throws IOException {
msg = msg.clone();
int useTTL = Math.min(initialTTL, MAX_TTL);
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("Propagating " + msg + "(TTL=" + useTTL + ") in group to :" + "\n\tsvc name:" + serviceName + "\tsvc params:"
+ serviceParam);
}
RendezVousPropagateMessage propHdr = updatePropHeader(msg, getPropHeader(msg), serviceName, serviceParam, useTTL);
if (null != propHdr) {
sendToEachConnection(msg, propHdr);
if (RendezvousMeterBuildSettings.RENDEZVOUS_METERING && (rendezvousMeter != null)) {
rendezvousMeter.propagateToGroup();
}
} else {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("Declining to propagate " + msg + " (No prop header)");
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void walk(Message msg, String serviceName, String serviceParam, int initialTTL) throws IOException {
propagateInGroup(msg, serviceName, serviceParam, initialTTL);
}
/**
* {@inheritDoc}
*/
@Override
public void walk(Vector<? extends ID> destPeerIDs, Message msg, String serviceName, String serviceParam, int initialTTL) throws IOException {
propagate(Collections.enumeration(destPeerIDs), msg, serviceName,
serviceParam, initialTTL);
}
/**
* @inheritDoc
*/
@Override
public PeerConnection getPeerConnection(ID peer) {
return rendezVous.get(peer);
}
/**
* @inheritDoc
*/
@Override
protected PeerConnection[] getPeerConnections() {
return rendezVous.values().toArray(new PeerConnection[0]);
}
private void disconnectFromAllRendezVous() {
for (RdvConnection pConn : new ArrayList<RdvConnection>(rendezVous.values())) {
try {
disconnectFromRendezVous(pConn.getPeerID());
} catch (Exception failed) {
if (Logging.SHOW_WARNING && LOG.isLoggable(Level.WARNING)) {
LOG.log(Level.WARNING, "disconnectFromRendezVous failed for " + pConn, failed);
}
}
}
}
/**
* Handle a disconnection request from a remote peer.
*
* @param msg Description of Parameter
*/
private void processDisconnectRequest(Message msg) {
try {
MessageElement elem = msg.getMessageElement(RendezVousServiceProvider.RDV_MSG_NAMESPACE_NAME, DisconnectRequest);
if (null != elem) {
XMLDocument asDoc = (XMLDocument) StructuredDocumentFactory.newStructuredDocument(elem);
PeerAdvertisement adv = (PeerAdvertisement) AdvertisementFactory.newAdvertisement(asDoc);
RdvConnection rdvConnection = rendezVous.get(adv.getPeerID());
if (null != rdvConnection) {
rdvConnection.setConnected(false);
removeRdv(adv.getPeerID(), true);
} else {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("Ignoring disconnect request from " + adv.getPeerID());
}
}
}
} catch (Exception failure) {
if (Logging.SHOW_WARNING && LOG.isLoggable(Level.WARNING)) {
LOG.log(Level.WARNING, "Failure processing disconnect request", failure);
}
}
}
/**
* Add a rendezvous to our collection of rendezvous peers.
*
* @param padv PeerAdvertisement for the rendezvous peer.
* @param lease The duration of the lease in relative milliseconds.
*/
private void addRdv(PeerAdvertisement padv, long lease) {
int eventType;
RdvConnection rdvConnection;
synchronized (rendezVous) {
rdvConnection = rendezVous.get(padv.getPeerID());
if (null == rdvConnection) {
rdvConnection = new RdvConnection(group, rdvService, padv.getPeerID());
rendezVous.put(padv.getPeerID(), rdvConnection);
eventType = RendezvousEvent.RDVCONNECT;
} else {
eventType = RendezvousEvent.RDVRECONNECT;
}
}
// Check if the peer is already registered.
if (RendezvousEvent.RDVRECONNECT == eventType) {
if (Logging.SHOW_INFO && LOG.isLoggable(Level.INFO)) {
LOG.info("Renewed RDV lease from " + rdvConnection);
}
// Already connected, just upgrade the lease
if (RendezvousMeterBuildSettings.RENDEZVOUS_METERING && (rendezvousServiceMonitor != null)) {
RendezvousConnectionMeter rendezvousConnectionMeter = rendezvousServiceMonitor.getRendezvousConnectionMeter(
padv.getPeerID());
rendezvousConnectionMeter.leaseRenewed(lease);
}
} else {
if (Logging.SHOW_INFO && LOG.isLoggable(Level.INFO)) {
LOG.info("New RDV lease from " + rdvConnection);
}
if (RendezvousMeterBuildSettings.RENDEZVOUS_METERING && (rendezvousServiceMonitor != null)) {
RendezvousConnectionMeter rendezvousConnectionMeter = rendezvousServiceMonitor.getRendezvousConnectionMeter(
padv.getPeerID());
rendezvousConnectionMeter.connectionEstablished(lease);
}
}
rdvConnection.connect(padv, lease, Math.min(LEASE_MARGIN, (lease / 2)));
rdvService.generateEvent(eventType, padv.getPeerID());
}
/**
* Remove the specified rendezvous from our collection of rendezvous.
*
* @param rdvid the id of the rendezvous to remove.
* @param requested if true, indicates a requested operation
*/
private void removeRdv(ID rdvid, boolean requested) {
if (Logging.SHOW_INFO && LOG.isLoggable(Level.INFO)) {
LOG.info("Disconnect from RDV " + rdvid);
}
PeerConnection rdvConnection;
synchronized (rendezVous) {
rdvConnection = rendezVous.remove(rdvid);
}
if (null != rdvConnection) {
if (rdvConnection.isConnected()) {
rdvConnection.setConnected(false);
sendDisconnect(rdvConnection);
}
}
rdvService.generateEvent(requested ? RendezvousEvent.RDVDISCONNECT : RendezvousEvent.RDVFAILED, rdvid);
if (RendezvousMeterBuildSettings.RENDEZVOUS_METERING && (rendezvousServiceMonitor != null)) {
RendezvousConnectionMeter rendezvousConnectionMeter = rendezvousServiceMonitor.getRendezvousConnectionMeter(
(PeerID) rdvid);
rendezvousConnectionMeter.connectionDisconnected();
}
}
/**
* Send lease request to the specified peer.
*
* @param pConn The peer to which the message should be sent.
* @throws IOException Thrown for errors sending the lease request.
*/
private void sendLeaseRequest(RdvConnection pConn) throws IOException {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("Sending Lease request to " + pConn);
}
RendezvousConnectionMeter rendezvousConnectionMeter = null;
if (RendezvousMeterBuildSettings.RENDEZVOUS_METERING && (rendezvousServiceMonitor != null)) {
rendezvousConnectionMeter = rendezvousServiceMonitor.getRendezvousConnectionMeter(pConn.getPeerID().toString());
}
Message msg = new Message();
// The request simply includes the local peer advertisement.
msg.replaceMessageElement(RendezVousServiceProvider.RDV_MSG_NAMESPACE_NAME
,
new TextDocumentMessageElement(ConnectRequest, getPeerAdvertisementDoc(), null));
pConn.sendMessage(msg, pName, pParam);
if (RendezvousMeterBuildSettings.RENDEZVOUS_METERING && (rendezvousConnectionMeter != null)) {
rendezvousConnectionMeter.beginConnection();
}
}
/**
* Description of the Method
*
* @param msg Description of Parameter
*/
private void processConnectedReply(Message msg) {
// get the Peer Advertisement of the RDV.
MessageElement peerElem = msg.getMessageElement(RendezVousServiceProvider.RDV_MSG_NAMESPACE_NAME, ConnectedRdvAdvReply);
if (null == peerElem) {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("Missing rendezvous peer advertisement");
}
return;
}
long lease;
try {
MessageElement el = msg.getMessageElement(RendezVousServiceProvider.RDV_MSG_NAMESPACE_NAME, ConnectedLeaseReply);
if (el == null) {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("missing lease");
}
return;
}
lease = Long.parseLong(el.toString());
} catch (Exception e) {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.log(Level.FINE, "Parse lease failed with ", e);
}
return;
}
ID pId;
MessageElement el = msg.getMessageElement(RendezVousServiceProvider.RDV_MSG_NAMESPACE_NAME, ConnectedPeerReply);
if (el == null) {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("missing rdv peer");
}
return;
}
try {
pId = IDFactory.fromURI(new URI(el.toString()));
} catch (URISyntaxException badID) {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("Bad RDV peer ID");
}
return;
}
if (lease <= 0) {
removeRdv(pId, false);
} else {
if (rendezVous.containsKey(pId) || (rendezVous.size() < MAX_RDV_CONNECTIONS)) {
PeerAdvertisement padv = null;
try {
XMLDocument asDoc = (XMLDocument) StructuredDocumentFactory.newStructuredDocument(peerElem);
padv = (PeerAdvertisement) AdvertisementFactory.newAdvertisement(asDoc);
} catch (Exception failed) {
if (Logging.SHOW_WARNING && LOG.isLoggable(Level.WARNING)) {
LOG.warning("Failed processing peer advertisement");
}
}
if (null == padv) {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("Missing rendezvous peer advertisement");
}
return;
}
if (!seedingManager.isAcceptablePeer(padv)) {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("Rejecting lease offer from unacceptable peer : " + padv.getPeerID());
}
// XXX bondolo 20061123 perhaps we should send a disconnect here.
return;
}
addRdv(padv, lease);
try {
DiscoveryService discovery = group.getDiscoveryService();
if (null != discovery) {
// This is not our own peer adv so we choose not to share it and keep it for only a short time.
discovery.publish(padv, lease * 2, 0);
}
} catch (IOException e) {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.log(Level.FINE, "failed to publish Rendezvous Advertisement", e);
}
}
String rdvName = padv.getName();
if (null == padv.getName()) {
rdvName = pId.toString();
}
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("RDV Connect Response : peer=" + rdvName + " lease=" + lease + "ms");
}
} else {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("Ignoring lease offer from " + pId);
}
// XXX bondolo 20040423 perhaps we should send a disconnect here.
}
}
}
/**
* A timer task for monitoring our active rendezvous connections.
* <p/>
* Checks leases, initiates lease renewals, starts new lease requests.
*/
private class MonitorTask extends SelfCancellingTask {
/**
* @inheritDoc
*/
public void execute() {
try {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("[" + group + "] Periodic rendezvous check");
}
if (closed) {
return;
}
if (!PeerGroupID.worldPeerGroupID.equals(group.getPeerGroupID())) {
MessageTransport router = rdvService.endpoint.getMessageTransport("jxta");
if (null == router) {
if (Logging.SHOW_WARNING && LOG.isLoggable(Level.WARNING)) {
LOG.warning("Rendezvous connection stalled until router is started!");
}
// Reschedule another run very soon.
this.cancel();
scheduleMonitor(2 * TimeUtils.ASECOND);
return;
}
}
List<RdvConnection> currentRdvs = new ArrayList<RdvConnection>(rendezVous.values());
for (RdvConnection pConn : currentRdvs) {
try {
if (!pConn.isConnected()) {
if (Logging.SHOW_INFO && LOG.isLoggable(Level.INFO)) {
LOG.fine("[" + group.getPeerGroupID() + "] Lease expired. Disconnected from " + pConn);
}
removeRdv(pConn.getPeerID(), false);
continue;
}
if (TimeUtils.toRelativeTimeMillis(pConn.getRenewal()) <= 0) {
if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine("[" + group.getPeerGroupID() + "] Attempting lease renewal for " + pConn);
}
sendLeaseRequest(pConn);
}
} catch (Exception e) {
if (Logging.SHOW_WARNING && LOG.isLoggable(Level.WARNING)) {
LOG.log(Level.WARNING, "[" + group.getPeerGroupID() + "] Failure while checking " + pConn, e);
}
}
}
// Not enough Rdvs? Try finding more.
if (rendezVous.size() < MAX_RDV_CONNECTIONS) {
if (seeds.isEmpty()) {
seeds.addAll(Arrays.asList(EdgePeerRdvService.this.seedingManager.getActiveSeedRoutes()));
}
int sentLeaseRequests = 0;
while (!seeds.isEmpty() && (sentLeaseRequests < 3)) {
RouteAdvertisement aSeed = seeds.remove(0);
Message msg = new Message();
// The lease request simply includes the local peer advertisement.
msg.addMessageElement(RendezVousServiceProvider.RDV_MSG_NAMESPACE_NAME
,
new TextDocumentMessageElement(ConnectRequest, getPeerAdvertisementDoc(), null));
Messenger msgr = null;
if (null == aSeed.getDestPeerID()) {
// It is an incomplete route advertisement. We are going to assume that it is only a wrapper for a single ea.
List<String> seed_eas = aSeed.getDest().getVectorEndpointAddresses();
if (!seed_eas.isEmpty()) {
EndpointAddress aSeedHost = new EndpointAddress(seed_eas.get(0));
msgr = rdvService.endpoint.getMessengerImmediate(aSeedHost, null);
}
} else {
// We have a full route, send it to the virtual address of the route!
EndpointAddress aSeedHost = new EndpointAddress(aSeed.getDestPeerID(), null, null);
msgr = rdvService.endpoint.getMessengerImmediate(aSeedHost, aSeed);
}
if (null != msgr) {
try {
msgr.sendMessageN(msg, pName, pParam);
sentLeaseRequests++;
} catch (Exception failed) {
// ignored
;
}
}
}
} else {
// We don't need any of the current seeds. Get new ones when we need them.
seeds.clear();
}
} catch (Throwable t) {
if (Logging.SHOW_WARNING && LOG.isLoggable(Level.WARNING)) {
LOG.log(Level.WARNING, "Uncaught throwable in thread :" + Thread.currentThread().getName(), t);
}
}
}
}
}