/**
* Adds the given <code>Contact</code> or updates it if it's already in our <code>RouteTable
* </code>
*/
private synchronized void addLiveContactInfo(Contact node, DHTMessage message) {
RouteTable routeTable = context.getRouteTable();
// If the Node is going to shutdown then don't bother
// further than this.
if (node.isShutdown()) {
if (LOG.isInfoEnabled()) {
LOG.info(node + " is going to shut down");
}
synchronized (routeTable) {
// Make sure there's an existing Contact in the RouteTable.
// Otherwise don't bother!
Contact existing = routeTable.get(node.getNodeID());
if (node.equals(existing)) {
// Update the new Contact in the RouteTable and
// mark it as shutdown
// mark the existing contact as shutdown if its alive or
// it will not be removed.
if (existing.isAlive()) existing.shutdown(true);
routeTable.add(node);
node.shutdown(true);
}
}
return;
}
// Ignore firewalled Nodes
if (node.isFirewalled()) {
if (LOG.isInfoEnabled()) {
LOG.info(node + " is firewalled");
}
return;
}
if (ContactUtils.isPrivateAddress(node)) {
if (LOG.isInfoEnabled()) {
LOG.info(node + " has a private address");
}
return;
}
KUID nodeId = node.getNodeID();
if (context.isLocalNodeID(nodeId)) {
// This is expected if there's a Node ID collision
assert (message instanceof PingResponse)
: "Expected a PingResponse but got a "
+ message.getClass()
+ " from "
+ message.getContact();
if (LOG.isInfoEnabled()) {
LOG.info("Looks like our NodeID collides with " + node);
}
return;
}
if (StoreSettings.STORE_FORWARD_ENABLED.getValue()) {
// Only do store forward if it is a new node in our routing table
// (we are (re)connecting to the network) or a node that is reconnecting
Contact existing = routeTable.get(nodeId);
if (existing == null
|| existing.isDead()
|| existing.getInstanceID() != node.getInstanceID()) {
// Store forward only if we're bootstrapped
if (context.isBootstrapped()) {
int k = KademliaSettings.REPLICATION_PARAMETER.getValue();
// we select the 2*k closest nodes in order to also check those values
// where the local node is part of the k closest to the value but not part
// of the k closest to the new joining node.
Collection<Contact> nodes = routeTable.select(nodeId, 2 * k, SelectMode.ALL);
// Are we one of the K nearest Nodes to the contact?
if (containsNodeID(nodes, context.getLocalNodeID())) {
if (LOG.isTraceEnabled()) {
LOG.trace(
"Node "
+ node
+ " is new or has changed his instanceID, will check for store forward!");
}
forwardOrRemoveValues(node, existing, message);
}
}
}
}
// Add the Node to our RouteTable or if it's
// already there update its timeStamp and whatsoever
routeTable.add(node);
}
@Before
public void setUp() {
NetworkSettings.LOCAL_IS_PRIVATE.setValue(false);
NetworkSettings.FILTER_CLASS_C.setValue(false);
ContactUtils.setNetworkInstanceUtils(new SimpleNetworkInstanceUtils(false));
}