/interpreter/tags/at2-build060407/src/edu/vub/at/actors/natives/NATRemoteFarRef.java

 1/**
 2 * AmbientTalk/2 Project
 3 * NATRemoteFarRef.java created on 22-dec-2006 at 11:35:01
 4 * (c) Programming Technology Lab, 2006 - 2007
 5 * Authors: Tom Van Cutsem & Stijn Mostinckx
 6 * 
 7 * Permission is hereby granted, free of charge, to any person
 8 * obtaining a copy of this software and associated documentation
 9 * files (the "Software"), to deal in the Software without
10 * restriction, including without limitation the rights to use,
11 * copy, modify, merge, publish, distribute, sublicense, and/or
12 * sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following
14 * conditions:
15 *
16 * The above copyright notice and this permission notice shall be
17 * included in all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
21 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
22 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
23 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
24 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
25 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
26 * OTHER DEALINGS IN THE SOFTWARE.
27 */
28package edu.vub.at.actors.natives;
29
30import edu.vub.at.actors.ATAsyncMessage;
31import edu.vub.at.actors.id.ATObjectID;
32import edu.vub.at.exceptions.InterpreterException;
33import edu.vub.at.objects.ATObject;
34import edu.vub.at.objects.ATStripe;
35import edu.vub.at.objects.ATTable;
36import edu.vub.at.objects.natives.NATNil;
37
38/**
39 * Instances of NATRemoteFarRef represent far references to physically remote actors.
40 * By 'physically remote', we mean in a separate address space.
41 * 
42 * TODO: implement finalizer and stop ELFarRef upon finalization
43 *
44 * @author tvcutsem
45 */
46public class NATRemoteFarRef extends NATFarReference {
47	
48	/**
49	 * When a remote far reference is passed on to another virtual machine, the event loop
50	 * is not taken with it. At the remote end, a new far reference will be created with the
51	 * appropriate event loop.
52	 */
53	private transient final ELFarReference sendLoop_;
54
55	public NATRemoteFarRef(ATObjectID objectId, ELActor hostActor, ATStripe[] stripes) {
56		super(objectId, stripes, hostActor);
57		sendLoop_ = new ELFarReference(objectId, hostActor, this);
58	}
59	
60	protected ATObject transmit(ATAsyncMessage message) throws InterpreterException {
61		sendLoop_.event_transmit(message);
62		return NATNil._INSTANCE_;
63	}
64	
65	public ATTable meta_retractUnsentMessages() throws InterpreterException {
66		return sendLoop_.retractUnsentMessages();
67	}
68}