/************************************************************************ * * $Id: OutgoingMessageEventListener.java,v 1.5 2003/11/13 05:09:17 bondolo Exp $ * * 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. *********************************************************************************/package net.jxta.endpoint;/** *  A listener for events concerning the status of outgoing messages. * **/public interface OutgoingMessageEventListener extends java.util.EventListener {        /**     *  The message identified by the event could not be sent.      *     *  <p/>The cause of the failure, if any, is available from     *  {@link OutgoingMessageEvent#getFailure()}. Failures while sending     *  messages have several causes :     *       *  <p/><ul>     *      <li>An {@link java.io.IOException} means that the messenger cannot     *      send the message and the messenger will accept no further messages     *      to be sent.</li>     *     *      <li>A {@link java.lang.RuntimeException} mean that the message was     *      not sent, but retries may or may not be possible based upon the     *      status returned by {@link Messenger#isClosed()}.</li>     *     *      <li><code>null</code> means that the message was not sent, but may     *      be retried. Usually the failure is due to local resource limits     *      being exceeded. Attempts may be made to later resend the message,     *      usually after waiting for congestion to clear.</li>     *  </ul>     **/    void messageSendFailed( OutgoingMessageEvent event );        /**     * The message identified by the event was successfully sent. Successfully      * sending a message is not a guarantee that it will be successfully     * received by the destination.     **/    void messageSendSucceeded( OutgoingMessageEvent event );    }