001 /**
002 * GRANITE DATA SERVICES
003 * Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004 *
005 * This file is part of the Granite Data Services Platform.
006 *
007 * Granite Data Services is free software; you can redistribute it and/or
008 * modify it under the terms of the GNU Lesser General Public
009 * License as published by the Free Software Foundation; either
010 * version 2.1 of the License, or (at your option) any later version.
011 *
012 * Granite Data Services is distributed in the hope that it will be useful,
013 * but WITHOUT ANY WARRANTY; without even the implied warranty of
014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015 * General Public License for more details.
016 *
017 * You should have received a copy of the GNU Lesser General Public
018 * License along with this library; if not, write to the Free Software
019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020 * USA, or see <http://www.gnu.org/licenses/>.
021 */
022 package org.granite.gravity.generic;
023
024 import org.granite.gravity.AbstractChannel;
025 import org.granite.gravity.AsyncHttpContext;
026 import org.granite.gravity.Gravity;
027 import org.granite.gravity.MessageReceivingException;
028 import org.granite.logging.Logger;
029
030 import flex.messaging.messages.AsyncMessage;
031
032 /**
033 * @author William DRAI
034 */
035 public class GenericChannel extends AbstractChannel {
036
037 private static final Logger log = Logger.getLogger(GenericChannel.class);
038
039 private WaitingContinuation continuation = null;
040
041 public GenericChannel(Gravity gravity, String id, GenericChannelFactory factory, String clientType) {
042 super(gravity, id, factory, clientType);
043 }
044
045 public void setContinuation(WaitingContinuation continuation) {
046 try {
047 if (this.continuation != null && this.continuation.isPending()) {
048 log.debug("Set pending continuation for client: %s", getId());
049 this.continuation.resume();
050 }
051 }
052 finally {
053 this.continuation = continuation;
054 }
055 }
056
057 public void close() {
058 try {
059 if (this.continuation != null)
060 this.continuation.reset();
061 }
062 finally {
063 this.continuation = null;
064 }
065 }
066
067
068 public void resume() {
069 try {
070 if (this.continuation != null) {
071 log.debug("Resume pending continuation for client: %s", getId());
072 this.continuation.resume();
073 }
074 }
075 finally {
076 this.continuation = null;
077 }
078 }
079
080 @Override
081 public void receive(AsyncMessage message) throws MessageReceivingException {
082 if (message == null)
083 throw new NullPointerException("message cannot be null");
084
085 receivedQueueLock.lock();
086 try {
087 receivedQueue.add(message);
088 }
089 catch (Exception e) {
090 throw new MessageReceivingException(message, "Could not queue message", e);
091 }
092 finally {
093 receivedQueueLock.unlock();
094 }
095
096 synchronized (this) {
097 resume();
098 }
099 }
100
101 @Override
102 protected boolean hasAsyncHttpContext() {
103 return false;
104 }
105
106 @Override
107 protected void releaseAsyncHttpContext(AsyncHttpContext context) {
108 }
109
110 @Override
111 protected AsyncHttpContext acquireAsyncHttpContext() {
112 return null;
113 }
114
115 public boolean isLocal() {
116 return true;
117 }
118
119 @Override
120 public void destroy() {
121 try {
122 super.destroy();
123 }
124 finally {
125 synchronized (this) {
126 close();
127 }
128 }
129 }
130 }