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/*
* Copyright (c) 2003-2007 Sun Microsystems, Inc. All rights reserved.
*
* The Sun Project JXTA(TM) Software License
*
* 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 Sun Microsystems, Inc. for JXTA(TM) technology."
* 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.
*
* JXTA is a registered trademark of Sun Microsystems, Inc. in the United
* States and other countries.
*
* Please see the license information page at :
* for instructions on use of
* the license in source files.
*
* ====================================================================
*
* 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.
*/
package net.jxta.impl.util.pipe.reliable;
import java.io.IOException;
import java.lang.IllegalStateException;
import net.jxta.pipe.OutputPipe;
import net.jxta.endpoint.Message;
import net.jxta.impl.util.TimeUtils;
/**
* And ountgoing pipe adaptor which does not use a thread or queue.
* Additionally, the pipe does not need to be provided at construction time.
* The send() method blocks until the pipe is specified.
*/
public class OutgoingPipeAdaptorSync implements Outgoing {
private OutputPipe pipe = null;
private long lastAccessed = 0;
private boolean closed = false;
public OutgoingPipeAdaptorSync(OutputPipe pipe) {
// Null permitted. Send will block until setPipe is called.
this.pipe = pipe;
// initialize to some reasonable value
lastAccessed = TimeUtils.timeNow();
}
public boolean sendNb(Message msg) throws IOException {
OutputPipe locPipe;
synchronized (this) {
locPipe = pipe;
}
if (closed || locPipe == null) {
return false;
}
locPipe.send(msg);
return true;
}
public boolean send(Message msg) throws IOException {
OutputPipe locPipe;
synchronized (this) {
while (pipe == null && !closed) {
try {
wait();
} catch (InterruptedException ignore) {}
}
if (closed) {
return false;
}
locPipe = pipe;
}
return locPipe.send(msg);
}
public void setPipe(OutputPipe pipe) {
synchronized (this) {
if (closed || this.pipe != null) {
throw new IllegalStateException("Cannot change pipe nor re-open");
}
this.pipe = pipe;
notifyAll();
}
}
/**
* {@inheritDoc}
*/
public void close() {
synchronized (this) {
if (closed) {
return;
}
closed = true;
if (pipe != null) {
pipe.close();
pipe = null;
}
notifyAll();
}
}
/**
* {@inheritDoc}
*/
public long getMinIdleReconnectTime() {
return 10 * TimeUtils.AMINUTE;
}
/**
* {@inheritDoc}
*
* Default should be "never", otherwise, connection closes while not
* in active use and ReliableOutputStream does NOT reconnect automatically.
*/
public long getIdleTimeout() {
return Long.MAX_VALUE;
}
/**
* {@inheritDoc}
*/
public void setTimeout(int timeout) {}
/**
* {@inheritDoc}
*
* This is the important tunable: how long to wait on a stale connection.
*/
public long getMaxRetryAge() {
return 1 * TimeUtils.AMINUTE;
}
/**
* {@inheritDoc}
*/
public long getLastAccessed() {
return lastAccessed;
}
/**
* {@inheritDoc}
*/
public void setLastAccessed(long time) {
lastAccessed = time;
}
/**
* {@inheritDoc}
*/
@Override
public String toString() {
return ((pipe == null) ? "no pipe yet" : pipe.toString()) + " lastAccessed=" + Long.toString(lastAccessed);
}
}