Created ServerCommunicator which does all I/O using the ConnectionManager's

polled socket system. This much more cleanly and efficiently integrates peer
(and other server to server) connections into the normal server I/O framework
and should also eliminate for good the annoying server hangs that result when
our old blocking client I/O threads got their pants wedged.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5510 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/client/ObserverOps.java

@@ -0,0 +1,49 @@
+//
+// $Id$
+//
+// Narya library - tools for developing networked games
+// Copyright (C) 2002-2008 Three Rings Design, Inc., All Rights Reserved
+// http://www.threerings.net/code/narya/
+//
+// This library is free software; you can redistribute it and/or modify it
+// under the terms of the GNU Lesser General Public License as published
+// by the Free Software Foundation; either version 2.1 of the License, or
+// (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+package com.threerings.presents.client;
+
+import com.samskivert.util.ObserverList;
+
+/**
+ * Used to notify session and client observers.
+ */
+public class ObserverOps
+{
+    public abstract static class Session implements ObserverList.ObserverOp<SessionObserver>
+    {
+        public boolean apply (SessionObserver obs) {
+            notify(obs);
+            return true;
+        }
+        protected abstract void notify (SessionObserver obs);
+    }
+
+    public abstract static class Client extends Session
+    {
+        @Override public void notify (SessionObserver obs) {
+            if (obs instanceof ClientObserver) {
+                notify((ClientObserver)obs);
+            }
+        }
+        protected abstract void notify (ClientObserver obs);
+    }
+}