Pave the way for DNS discovery

Author: lloydwatkin

pom.xml

@@ -10,6 +10,11 @@
         <url>https://github.com/buddycloud/buddycloud-server-java</url>
     </scm>
     <dependencies>
+        <dependency>
+	    <groupId>dnsjava</groupId>
+	    <artifactId>dnsjava</artifactId>
+	    <version>2.1.1</version>
+        </dependency>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>

src/main/java/org/buddycloud/channelserver/queue/FederatedQueueManager.java

@@ -19,6 +19,7 @@
 import org.xmpp.packet.JID;
 import org.xmpp.packet.Packet;
 import org.xmpp.packet.PacketError;
+import org.xbill.DNS.*;
 
 public class FederatedQueueManager {
 	private static final Logger logger = Logger
@@ -199,19 +200,25 @@ public void processDiscoInfoResponse(JID from, String id,
 				sendFederatedRequests(originatingServer);
 			}
 		}
-		
+
 		if (remoteServerItemsToProcess.get(originatingServer) < 1) {
 			if (!discoveredServers.containsKey(originatingServer)) {
-				sendRemoteChannelServerNotFoundErrorResponses(originatingServer);
-				remoteChannelDiscoveryStatus.put(originatingServer,
-						NO_CHANNEL_SERVER);
-				waitingStanzas.remove(originatingServer);
+                if (false == attemptDnsDiscovery(originatingServer)) {
+                    sendRemoteChannelServerNotFoundErrorResponses(originatingServer);
+                    remoteChannelDiscoveryStatus.put(originatingServer,
+                            NO_CHANNEL_SERVER);
+                    waitingStanzas.remove(originatingServer);
+                }
 			} else {
 				remoteChannelDiscoveryStatus.put(originatingServer, DISCOVERED);
 			}
 		}
 	}
 
+    private void attemptDnsDiscovery(String originatingServer) {
+        return false;
+    }
+
 	private void sendFederatedRequests(String originatingServer)
 			throws ComponentException {
 		String remoteServer = discoveredServers.get(originatingServer);