/*
* Copyright (c) 2001 Sun Microsystems, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Sun Microsystems, Inc. for Project JXTA."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact Project JXTA at http://www.jxta.org.
*
* 5. Products derived from this software may not be called "JXTA",
* nor may "JXTA" appear in their name, without prior written
* permission of Sun.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL SUN MICROSYSTEMS OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of Project JXTA. For more
* information on Project JXTA, please see
* <http://www.jxta.org/>.
*
* This license is based on the BSD license adopted by the Apache Foundation.
*
* $Id: ShellOutputPipe.java,v 1.27 2007/02/09 23:12:40 hamada Exp $
*/
package net.jxta.impl.shell;
import java.io.IOException;
import net.jxta.endpoint.Message;
import net.jxta.endpoint.MessageElement;
import net.jxta.id.ID;
import net.jxta.peergroup.PeerGroup;
import net.jxta.pipe.OutputPipe;
import net.jxta.protocol.PipeAdvertisement;
import java.util.Iterator;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.logging.Level;
import net.jxta.logging.Logging;
/**
* This class implements the default JXTA Shell OutputPipe.
* Message received on the pipe are displayed onto the console.
*/
public class ShellOutputPipe implements Runnable, OutputPipe {
/**
* Logger
*/
private static final transient java.util.logging.Logger LOG = java.util.logging.Logger.getLogger(ShellOutputPipe.class.getName());
private volatile boolean closed;
private final ShellConsole cons;
private final BlockingQueue<Message> queue;
private Thread thread = null;
public ShellOutputPipe(PeerGroup group, ShellConsole cons) {
this.cons = cons;
queue = new ArrayBlockingQueue<Message>(100);
thread = new Thread(group.getHomeThreadGroup(), this, "ShellOutputPipe-" + cons.getConsoleName());
thread.setDaemon(true);
thread.start();
}
/**
* {@inheritDoc}
*/
public boolean send(Message msg) throws IOException {
boolean pushed = false;
while(!pushed & !closed) {
try {
queue.put(msg);
pushed = true;
} catch(InterruptedException woken) {
Thread.interrupted();
}
}
if(!pushed && closed) {
IOException failed = new IOException("Could not enqueue " + msg + " for sending. Pipe is closed.");
if (Logging.SHOW_SEVERE && LOG.isLoggable(Level.SEVERE)) {
LOG.log(Level.SEVERE, failed.getMessage(), failed);
}
throw failed;
}
return pushed;
}
/**
* {@inheritDoc}
* <p/>
* <p/>Not implemented.
*/
public PipeAdvertisement getAdvertisement() {
throw new UnsupportedOperationException("Not supported by ShellOutputPipe");
}
/**
* {@inheritDoc}
* <p/>
* <p/>Not implemented.
*/
public String getName() {
throw new UnsupportedOperationException("Not supported by ShellOutputPipe");
}
/**
* {@inheritDoc}
*/
public ID getPipeID() {
throw new UnsupportedOperationException("Not supported by ShellOutputPipe");
}
/**
* {@inheritDoc}
*/
public String getType() {
throw new UnsupportedOperationException("Not supported by ShellOutputPipe");
}
/**
* {@inheritDoc}
*/
public synchronized void close() {
closed = true;
Thread temp = thread;
if (null != temp) {
temp.interrupt();
}
}
/**
* {@inheritDoc}
*/
public boolean isClosed() {
return closed;
}
/**
* {@inheritDoc}
*/
public void run() {
try {
while (!closed) {
Message msg;
try {
msg = queue.take();
} catch (InterruptedException woken) {
Thread.interrupted();
continue;
}
// Get all the chunks of data in the message
Iterator<MessageElement> els = msg.getMessageElementsOfNamespace(null);
while (els.hasNext()) {
MessageElement el = els.next();
cons.write(el.toString());
}
}
} catch (Throwable all) {
if (LOG.isLoggable(java.util.logging.Level.SEVERE)) {
LOG.log(java.util.logging.Level.SEVERE,
"Uncaught Throwable in Thread : " + Thread.currentThread().getName(), all);
}
} finally {
thread = null;
}
}
}