- Monitor logins to other nodes, boot any local sessions with the same

authentication name.
- Use new (ca. 2002) pattern of creating an overridable listener,
rather than making the whole class a listener.

Mdb told me to add this at the msoy level, but I think it belongs here.
Presents simply expects a user to be in one place.

It also occurs to me that we probably want something more sophisticated:
there may be unpersisted data connected to the session that should
be flushed prior to the session starting on another node. We may
want something like a lock when users log-in, so that other nodes
can terminate the session and flush any persistent data FIRST.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5635 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/peer/server/PeerManager.java

@@ -984,6 +984,19 @@ public abstract class PeerManager
         return new PeerCreds(_nodeName, _sharedSecret);
     }
 
+    /**
+     * Called when we hear about a client logging on to another node.
+     */
+    protected void clientLoggedOnOtherNode (String nodeName, ClientInfo clinfo)
+    {
+        PresentsSession session = _clmgr.getClient(clinfo.username);
+        if (session != null) {
+            log.info("Booting user that has connected on another node",
+                "username", clinfo.username, "otherNode", nodeName);
+            session.endSession();
+        }
+    }
+
     /**
      * Called when a peer connects to this server.
      */