/** initialize routeResolver */
public void init(PeerGroup group, ID assignedID, Advertisement impl, EndpointRouter router)
throws PeerGroupException {
// extract Router service configuration properties
PlatformConfig confAdv = (PlatformConfig) group.getConfigAdvertisement();
Element paramBlock = null;
if (confAdv != null) {
paramBlock = confAdv.getServiceParam(assignedID);
}
if (paramBlock != null) {
// get our tunable router parameter
Enumeration param;
param = paramBlock.getChildren("useRouteResolver");
if (param.hasMoreElements()) {
useRouteResolver = Boolean.getBoolean(((TextElement) param.nextElement()).getTextValue());
}
}
this.group = group;
this.router = router;
localPeerId = group.getPeerID();
localPeerAddr =
new EndpointAddress("jxta", localPeerId.getUniqueValue().toString(), null, null);
}
/**
* remove a SRDI cache entry
*
* @param peer peer id we send the request, null for sending to all
* @param id peer id of the SRDI route that we want to remove from the cache
*/
protected void removeSrdi(String peer, PeerID id) {
SrdiMessage srdiMsg;
try {
srdiMsg =
new SrdiMessageImpl(
group.getPeerID(),
1, // only one hop
"route",
id.toString(),
null, // 0 means remove
new Long(0).longValue());
if (LOG.isEnabledFor(Level.DEBUG)) {
LOG.debug("sending a router SRDI message delete route " + id);
}
if (peer == null) {
PeerID destPeer = srdi.getReplicaPeer(id.toString());
// don't push anywhere if we do not have replica
// or we are trying to push to ouself
if (destPeer != null && (!destPeer.equals(localPeerId))) {
srdi.pushSrdi(destPeer, srdiMsg);
}
}
} catch (Exception e) {
if (LOG.isEnabledFor(Level.DEBUG)) {
LOG.debug("Removing srdi entry failed", e);
}
}
}
/** {@inheritDoc} */
public boolean send(Message message) throws IOException {
if (closed) {
throw new IOException("Pipe closed");
}
Message msg = message.clone();
WireHeader header = new WireHeader();
header.setPipeID(getPipeID());
header.setSrcPeer(group.getPeerID());
header.setTTL(1);
header.setMsgId(WirePipe.createMsgId());
XMLDocument asDoc = (XMLDocument) header.getDocument(MimeMediaType.XMLUTF8);
MessageElement elem =
new TextDocumentMessageElement(WirePipeImpl.WIRE_HEADER_ELEMENT_NAME, asDoc, null);
msg.replaceMessageElement(WirePipeImpl.WIRE_HEADER_ELEMENT_NAMESPACE, elem);
checkMessenger();
try {
destMessenger.sendMessageB(msg, null, null);
} catch (IOException io) {
checkMessenger();
destMessenger.sendMessageB(msg, null, null);
}
return true;
}
/*
* push all srdi entries to the rednezvous SRDI cache (new connection)
*@param all if true push all entries, otherwise just deltas
*/
protected void pushSrdi(String peer, boolean all) {
SrdiMessage srdiMsg;
Vector routeIx = new Vector();
// 10182002tra:Route info don't expire unless the peer disappears
// This approach is used to limit the SRDI traffic. The key
// point here is that SRDI is used to tell a peer that another
// has a route to the destination it is looking for. The information
// that SRDI cache is not so much the specific route info but rather
// the fact that a peer has knowledge of a route to another peer
// We don't want to update the SRDI cache on every route update.
// The SRDI cache will be flushed when the peer disconnect from
// the rendezvous.
// We cannot support concurrent modification of the map while we
// do that: we must synchronize...
for (Iterator each = router.getAllRoutedRouteAddresses(); each.hasNext(); ) {
PeerID pid = router.addr2pid((EndpointAddress) each.next());
SrdiMessage.Entry entry = new SrdiMessage.Entry(pid.toString(), "", Long.MAX_VALUE);
routeIx.addElement(entry);
}
try {
// check if we have anything to send
if (routeIx.size() == 0) {
return;
}
srdiMsg =
new SrdiMessageImpl(
group.getPeerID(),
1, // one hop
"route",
routeIx);
if (LOG.isEnabledFor(Level.DEBUG)) {
LOG.debug("Sending a SRDI messsage of [All=" + all + "] routes");
}
// this will replicate entry to the SRDI replica peers
srdi.replicateEntries(srdiMsg);
} catch (Exception e) {
if (LOG.isEnabledFor(Level.WARN)) {
LOG.warn("SRDI Push failed", e);
}
}
}
/*
* push srdi entries to the SRDI rendezvous cache
* @param all if true push all entries, otherwise just deltas
*/
protected void pushSrdi(ID peer, PeerID id) {
SrdiMessage srdiMsg;
try {
srdiMsg =
new SrdiMessageImpl(
group.getPeerID(),
1, // only one hop
"route",
id.toString(),
null,
new Long(Long.MAX_VALUE).longValue()); // maximum expiration
// 10182002tra:Route info don't expire unless the peer disappears
// This approach is used to limit the SRDI traffic. The key
// point here is that SRDI is used to tell a peer that another
// has a route to the destination it is looking for. The information
// that SRDI cache is not so much the specific route info but rather
// the fact that a peer has knowledge of a route to another peer
// We don't want to update the SRDI cache on every route update.
// The SRDI cache will be flushed when the peer disconnect from
// the rendezvous.
if (LOG.isEnabledFor(Level.DEBUG)) {
LOG.debug("sending a router SRDI message add route " + id);
}
if (peer == null) {
PeerID destPeer = srdi.getReplicaPeer(id.toString());
peer = destPeer;
}
// don't push anywhere if we do not have a replica
// or we are trying to send the query to ourself
if (!localPeerId.equals(peer)) {
srdi.pushSrdi(peer, srdiMsg);
}
} catch (Exception e) {
if (LOG.isEnabledFor(Level.WARN)) {
LOG.warn("SRDI push failed", e);
}
}
}
/** {@inheritDoc} */
public ID getPeerID() {
return peergroup.getPeerID();
}
