/interpreter/tags/at2dist110511/src/edu/vub/at/actors/natives/NATLocalFarRef.java
http://ambienttalk.googlecode.com/ · Java · 110 lines · 56 code · 10 blank · 44 comment · 4 complexity · e7144e16c990615990d7706fa800a369 MD5 · raw file
- /**
- * AmbientTalk/2 Project
- * NATLocalFarRef.java created on 22-dec-2006 at 11:34:15
- * (c) Programming Technology Lab, 2006 - 2007
- * Authors: Tom Van Cutsem & Stijn Mostinckx
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use,
- * copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following
- * conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- */
- package edu.vub.at.actors.natives;
- import java.util.Iterator;
- import java.util.Vector;
- import edu.vub.at.actors.ATAsyncMessage;
- import edu.vub.at.actors.ATLetter;
- import edu.vub.at.actors.id.ATObjectID;
- import edu.vub.at.actors.natives.NATActorMirror.NATLetter;
- import edu.vub.at.actors.natives.NATFarReference.NATOutboxLetter;
- import edu.vub.at.eval.Evaluator;
- import edu.vub.at.exceptions.InterpreterException;
- import edu.vub.at.exceptions.XTypeMismatch;
- import edu.vub.at.objects.ATObject;
- import edu.vub.at.objects.ATTable;
- import edu.vub.at.objects.ATTypeTag;
- import edu.vub.at.objects.mirrors.NativeClosure;
- import edu.vub.at.objects.natives.NATTable;
- import edu.vub.at.util.logging.Logging;
- /**
- * Instances of NATLocalFarRef denote far references to objects 'local' to this address space.
- * That is, the far object is hosted by a local actor and hence message transmission is not subject
- * to network routing or partial failure and messages may be immediately scheduled in the inbox of
- * the recipient object's host actor.
- *
- * @author tvcutsem
- */
- public class NATLocalFarRef extends NATFarReference {
- /** when serializing a far reference, the event loop stays home */
- private transient final ELActor farObjectHost_;
- public NATLocalFarRef(ELActor farObjectHost, ATObjectID objectId, ATTypeTag[] types, ELActor myHost, boolean isConnected) {
- super(objectId, types, myHost, isConnected);
- farObjectHost_ = farObjectHost;
- }
-
- protected void transmit(ATLetter letter) throws InterpreterException {
- synchronized (this) {
- if (!connected_) {
- outbox_.addLast(letter);
- } else{
- // the far reference itself is the receiver of the asynchronous message
- farObjectHost_.event_localAccept(this, letter.asNativeOutboxLetter().impl_getSerializedMessage());
- }
- }
- }
-
- //called to notify connected/disconnected
- protected synchronized void notifyStateToSendLoop(boolean state){
- //if notifying reconnection, flush the outbox
- if (state) {
- if (outbox_.size() > 0) {
- for (Iterator Iter = outbox_.iterator(); Iter.hasNext();) {
- try {
- ATLetter next = (ATLetter) Iter.next();
- NATOutboxLetter letter = next.asNativeOutboxLetter();
- farObjectHost_.event_localAccept(this, letter.impl_getSerializedMessage());
- } catch (XTypeMismatch e) {
- Logging.RemoteRef_LOG.info(this + ": unexpected type mismatch: " + e.getMessage());
- e.printStackTrace();
- }
- }
- // empty the outbox
- outbox_.clear();
- }
- }
- }
-
- /**
- * Note that the 'outbox' of a local far reference is normally empty, except if
- * the local far reference was disconnected by means of a 'soft disconnect'.
- */
- public ATTable meta_retractUnsentMessages() throws InterpreterException {
- return impl_retractUnsentMessages();
- }
-
- public ELActor getFarHost() {
- return farObjectHost_;
- }
-
- }