/interpreter/tags/at2dist091109/src/edu/vub/at/actors/net/cmd/CMDJoinServices.java

 1/**
 2 * AmbientTalk/2 Project
 3 * CMDJoinServices.java created on 22-feb-2007 at 15:51:02
 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.net.cmd;
29
30import edu.vub.at.actors.natives.ELVirtualMachine;
31import edu.vub.at.actors.net.comm.Address;
32import edu.vub.at.actors.net.comm.CommunicationBus;
33import edu.vub.util.MultiMap;
34
35
36/**
37 * A CMDJoinServices message is sent asynchronously as a reply to:
38 *  - an initial discovery request from a VM
39 *  - a subsequent discovery request when a VM subscribes to a new service
40 * SENDER: the VM that provides some service objects
41 * RECEIVER: the VM that previously sent a request for required services
42 * MODE: ASYNCHRONOUS, UNICAST
43 * PROPERTIES: a map of subscription topic to published objects
44 * REPLY: none
45 * 
46 * @author tvcutsem
47 */
48
49public class CMDJoinServices extends VMCommand {
50
51	private static final long serialVersionUID = -531880533782855168L;
52	
53	/** 
54	 * A map from serialized ATTypeTag topics to Sets of serialized ATObjects that
55	 * provide the serialized topic
56	 */
57	private final MultiMap providedServices_;
58	
59	public CMDJoinServices(MultiMap providedServices) {
60		super("joinServices");
61		providedServices_ = providedServices;
62	}
63	
64	public void send(CommunicationBus dispatcher, Address recipientVM) {
65		dispatcher.sendAsyncUnicast(this, recipientVM);
66	}
67	
68	public void uponReceiptBy(ELVirtualMachine remoteHost, Address senderAddress) {
69		// notify the local subscribers of the provided services via the local discovery actor
70		remoteHost.discoveryActor_.event_batchRemotePublications(providedServices_);
71	}
72	
73}