2 * Copyright (c) 2001-2007 Sun Microsystems, Inc. All rights reserved.
4 * The Sun Project JXTA(TM) Software License
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are met:
9 * 1. Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
16 * 3. The end-user documentation included with the redistribution, if any, must
17 * include the following acknowledgment: "This product includes software
18 * developed by Sun Microsystems, Inc. for JXTA(TM) technology."
19 * Alternately, this acknowledgment may appear in the software itself, if
20 * and wherever such third-party acknowledgments normally appear.
22 * 4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
23 * not be used to endorse or promote products derived from this software
24 * without prior written permission. For written permission, please contact
25 * Project JXTA at http://www.jxta.org.
27 * 5. Products derived from this software may not be called "JXTA", nor may
28 * "JXTA" appear in their name, without prior written permission of Sun.
30 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
32 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SUN
33 * MICROSYSTEMS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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38 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
39 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
41 * JXTA is a registered trademark of Sun Microsystems, Inc. in the United
42 * States and other countries.
44 * Please see the license information page at :
45 * <http://www.jxta.org/project/www/license.html> for instructions on use of
46 * the license in source files.
48 * ====================================================================
50 * This software consists of voluntary contributions made by many individuals
51 * on behalf of Project JXTA. For more information on Project JXTA, please see
52 * http://www.jxta.org.
54 * This license is based on the BSD license adopted by the Apache Foundation.
56 package net.jxta.impl.pipe;
58 import net.jxta.endpoint.EndpointAddress;
59 import net.jxta.endpoint.EndpointListener;
60 import net.jxta.endpoint.Message;
61 import net.jxta.id.ID;
62 import net.jxta.impl.util.TimeUtils;
63 import net.jxta.impl.util.UnbiasedQueue;
64 import net.jxta.logging.Logging;
65 import net.jxta.pipe.InputPipe;
66 import net.jxta.pipe.PipeID;
67 import net.jxta.pipe.PipeMsgEvent;
68 import net.jxta.pipe.PipeMsgListener;
69 import net.jxta.protocol.PipeAdvertisement;
71 import java.io.IOException;
72 import java.util.logging.Level;
73 import java.util.logging.Logger;
76 * Implements the {@link net.jxta.pipe.InputPipe} interface by listening on the
77 * endpoint for messages to service "PipeService" and a param of the Pipe ID.
79 class InputPipeImpl implements EndpointListener, InputPipe {
84 private final static Logger LOG = Logger.getLogger(InputPipeImpl.class.getName());
86 protected final static int QUEUESIZE = 100;
88 protected PipeRegistrar registrar;
90 protected final PipeAdvertisement pipeAdv;
91 protected final ID pipeID;
93 protected volatile boolean closed = false;
95 protected PipeMsgListener listener;
96 protected final UnbiasedQueue queue;
99 * Constructor for the InputPipeImpl object
101 * @param r pipe resolver
102 * @param adv pipe advertisement
103 * @param listener listener to receive messages
104 * @throws IOException if an io error occurs
106 InputPipeImpl(PipeRegistrar r, PipeAdvertisement adv, PipeMsgListener listener) throws IOException {
109 this.listener = listener;
111 pipeID = adv.getPipeID();
113 if (Logging.SHOW_INFO && LOG.isLoggable(Level.INFO)) {
115 "Creating InputPipe for " + pipeID + " of type " + adv.getType() + " with "
116 + ((null != listener) ? "listener" : "queue"));
119 // queue based inputpipe?
120 if (listener == null) {
121 queue = UnbiasedQueue.synchronizedQueue(new UnbiasedQueue(QUEUESIZE, true));
126 if (!registrar.register(this)) {
127 throw new IOException("Could not register input pipe (already registered) for " + pipeID);
137 protected synchronized void finalize() throws Throwable {
139 if (Logging.SHOW_WARNING && LOG.isLoggable(Level.WARNING)) {
140 LOG.warning("Pipe is being finalized without being previously closed. This is likely a bug.");
150 public Message waitForMessage() throws InterruptedException {
157 public Message poll(int timeout) throws InterruptedException {
158 if (listener == null) {
159 return (Message) queue.pop(timeout);
161 if (Logging.SHOW_WARNING && LOG.isLoggable(Level.WARNING)) {
162 LOG.warning("poll() has no effect in listener mode.");
171 public synchronized void close() {
178 if (null == listener) {
183 // Remove myself from the pipe registrar.
184 if (!registrar.forget(this)) {
185 if (Logging.SHOW_WARNING && LOG.isLoggable(Level.WARNING)) {
186 LOG.warning("close() : pipe was not registered with registrar.");
191 if (Logging.SHOW_INFO && LOG.isLoggable(Level.INFO)) {
192 LOG.info("Closed " + pipeID);
199 public void processIncomingMessage(Message msg, EndpointAddress srcAddr, EndpointAddress dstAddr) {
200 // if we are closed, ignore any additional messages
205 // XXX: header check, security and such should be done here
206 // before pushing the message onto the queue.
207 if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
208 LOG.fine("Received " + msg + " from " + srcAddr + " for " + pipeID);
210 // determine where demux the msg, to listener, or onto the queue
212 PipeMsgListener temp = listener;
217 PipeMsgEvent event = new PipeMsgEvent(this, msg, (PipeID) pipeID);
219 temp.pipeMsgEvent(event);
220 } catch (Throwable ignored) {
221 if (Logging.SHOW_SEVERE && LOG.isLoggable(Level.SEVERE)) {
222 LOG.log(Level.SEVERE, "Uncaught Throwable in listener for : " + pipeID + "(" + temp.getClass().getName() + ")", ignored);
226 boolean pushed = false;
227 while (!pushed && !queue.isClosed()) {
229 pushed = queue.push(msg, TimeUtils.ASECOND);
230 } catch (InterruptedException woken) {
231 Thread.interrupted();
235 if (Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
236 synchronized (this) {
237 LOG.fine("Queued " + msg + " for " + pipeID + "\n\tqueue closed : " + queue.isClosed() + "\tnumber in queue : "
238 + queue.getCurrentInQueue() + "\tnumber queued : " + queue.getNumEnqueued() + "\tnumber dequeued : "
239 + queue.getNumDequeued());
250 public String getType() {
251 return pipeAdv.getType();
259 public ID getPipeID() {
268 public String getName() {
269 return pipeAdv.getName();
273 * Gets the pipe advertisement
275 * @return The advertisement
277 public PipeAdvertisement getAdvertisement() {