Specifically ACK unsubscribe requests so that we don't see a bunch of

warning messages saying that we couldn't deliver events on the client that
come in after all client-side subscribers have been removed.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@2204 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/net/UnsubscribeResponse.java

@@ -0,0 +1,40 @@
+//
+// $Id: UnsubscribeResponse.java,v 1.1 2003/01/21 22:02:37 mdb Exp $
+
+package com.threerings.presents.net;
+
+/**
+ * Used to communicate to the client that we received their unsubscribe
+ * request and that it is now OK to remove an object mapping from their
+ * local object table.
+ */
+public class UnsubscribeResponse extends DownstreamMessage
+{
+    /**
+     * Zero argument constructor used when unserializing an instance.
+     */
+    public UnsubscribeResponse ()
+    {
+        super();
+    }
+
+    /**
+     * Constructs an unsubscribe response with the supplied oid.
+     */
+    public UnsubscribeResponse (int oid)
+    {
+        _oid = oid;
+    }
+
+    public int getOid ()
+    {
+        return _oid;
+    }
+
+    public String toString ()
+    {
+        return "[type=UNACK, msgid=" + messageId + ", oid=" + _oid + "]";
+    }
+
+    protected int _oid;
+}