Three things:

- Inject the auth Invoker.
- Inject the Authenticator and formalize the chaining authenticator pattern.
- Simplify PeerNode creation and make the PeerAuthenticator a chainer.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5162 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/server/ChainedAuthenticator.java

@@ -0,0 +1,64 @@
+//
+// $Id$
+//
+// 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.server;
+
+import com.samskivert.util.Invoker;
+import com.samskivert.util.ResultListener;
+
+import com.threerings.presents.server.net.AuthingConnection;
+
+/**
+ * Handles certain special kinds of authentications and passes the remainder through to the default
+ * authenticator.
+ */
+public abstract class ChainedAuthenticator extends Authenticator
+{
+    /**
+     * Called by the {@link ConnectionManager} to initialize our delegate.
+     */
+    public void setChainedAuthenticator (Authenticator author)
+    {
+        _delegate = author;
+    }
+
+    @Override // from Authenticator
+    public void authenticateConnection (Invoker invoker, AuthingConnection conn,
+                                        ResultListener<AuthingConnection> onComplete)
+    {
+        // if we handle this sort of authentication, then do so
+        if (shouldHandleConnection(conn)) {
+            super.authenticateConnection(invoker, conn, onComplete);
+
+        } else {
+            // otherwise pass the request on to our delegate
+            _delegate.authenticateConnection(invoker, conn, onComplete);
+        }
+    }
+
+    /**
+     * Derived classes should implement this method and return true if the supplied connection is
+     * one that they should authenticate.
+     */
+    protected abstract boolean shouldHandleConnection (AuthingConnection conn);
+
+    protected Authenticator _delegate;
+}