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

http://ambienttalk.googlecode.com/ · Java · 73 lines · 26 code · 8 blank · 39 comment · 0 complexity · 5fedf2951de9ed7b221311f0b456c792 MD5 · raw file

  1. /**
  2. * AmbientTalk/2 Project
  3. * NATLocalFarRef.java created on 22-dec-2006 at 11:34:15
  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. */
  28. package edu.vub.at.actors.natives;
  29. import edu.vub.at.actors.ATAsyncMessage;
  30. import edu.vub.at.actors.id.ATObjectID;
  31. import edu.vub.at.exceptions.InterpreterException;
  32. import edu.vub.at.objects.ATObject;
  33. import edu.vub.at.objects.ATStripe;
  34. import edu.vub.at.objects.ATTable;
  35. import edu.vub.at.objects.natives.NATNil;
  36. import edu.vub.at.objects.natives.NATTable;
  37. /**
  38. * Instances of NATLocalFarRef denote far references to objects 'local' to this address space.
  39. * That is, the far object is hosted by a local actor and hence message transmission is not subject
  40. * to network routing or partial failure and messages may be immediately scheduled in the inbox of
  41. * the recipient object's host actor.
  42. *
  43. * @author tvcutsem
  44. */
  45. public class NATLocalFarRef extends NATFarReference {
  46. /** when serializing a far reference, the event loop stays home */
  47. private transient final ELActor farObjectHost_;
  48. public NATLocalFarRef(ELActor farObjectHost, ATObjectID objectId, ATStripe[] stripes, ELActor myHost) {
  49. super(objectId, stripes, myHost);
  50. farObjectHost_ = farObjectHost;
  51. }
  52. protected ATObject transmit(ATAsyncMessage passedMessage) throws InterpreterException {
  53. farObjectHost_.event_localAccept(this, new Packet(passedMessage.toString(), passedMessage));
  54. return NATNil._INSTANCE_;
  55. }
  56. /**
  57. * The 'outbox' of a far reference to a local actor is always empty.
  58. */
  59. public ATTable meta_retractUnsentMessages() throws InterpreterException {
  60. return NATTable.EMPTY;
  61. }
  62. public ELActor getFarHost() {
  63. return farObjectHost_;
  64. }
  65. }