Note the actual transport with which events are transmitted.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@5794 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/presents/dobj/DEvent.java

@@ -152,6 +152,23 @@ public abstract class DEvent implements Streamable
         return _transport;
     }
 
+    /**
+     * Notes the actual transport with which the event was transmitted.
+     */
+    public void noteActualTransport (Transport transport)
+    {
+        _actualTransport = transport;
+    }
+
+    /**
+     * Returns the actual transport with which the event was transmitted, or <code>null</code> if
+     * not yet known.
+     */
+    public Transport getActualTransport ()
+    {
+        return _actualTransport;
+    }
+
     /**
      * Events with associated listener interfaces should implement this function and notify the
      * supplied listener if it implements their event listening interface. For example, the {@link
@@ -195,6 +212,9 @@ public abstract class DEvent implements Streamable
     /** The transport parameters. */
     protected transient Transport _transport = Transport.DEFAULT;
 
+    /** The actual transport with which the event was transmitted (null if as yet unknown). */
+    protected transient Transport _actualTransport;
+
     /** Used to differentiate between null meaning we haven't initialized our old value and null
      * being the actual old value. */
     protected static final Object UNSET_OLD_VALUE = new Object();