inputpipe.java

jxta_src_2.41b jxta 2.41b 最新版源码 from www.jxta.org

/*
 *  Copyright (c) 2001-2006 Sun Microsystems, Inc.  All rights reserved.
 *
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 *  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
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 *  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: InputPipe.java,v 1.20 2006/05/25 00:35:36 hamada Exp $
 */

package net.jxta.pipe;

import net.jxta.id.ID;
import net.jxta.endpoint.Message;
import net.jxta.protocol.PipeAdvertisement;

/**
 * InputPipe defines the interface for receiving messages from a
 * {@link net.jxta.pipe.PipeService}.
 *
 * <p/>An application that wants to receive messages from a Pipe will create
 * an input pipe.
 *
 * <p/>An InputPipe is created and returned by the
 * {@link net.jxta.pipe.PipeService}
 *
 * @see    net.jxta.pipe.PipeService
 * @see    net.jxta.pipe.OutputPipe
 * @see    net.jxta.endpoint.Message
 * @see    net.jxta.endpoint.MessageElement
 * @see    net.jxta.protocol.PipeAdvertisement
 */
public interface InputPipe {

    /**
     * Wait (block) for a message to be received.
     *
     * @return                           a message or null if the pipe has been closed.
     * @exception  InterruptedException  If another thread interrupted while we
     * were waiting for a message.
     */
    public Message waitForMessage() throws InterruptedException;

    /**
     * Poll for a message from the pipe. If there is no message immediately
     * available then wait the specified amount of time for a message to arrive.
     *
     * @param  timeout                Maximum number of milliseconds to wait (block) for a
     *  message to be received. If zero then wait indefinitely for a message.
     * @return                        Message received or null if the pipe has closed or the timeout
     * expired without a message being received.
     * @throws  InterruptedException  If another thread interrupted while we
     * were waiting for a message.
     */
    public Message poll(int timeout) throws InterruptedException;


    /**
     * Close the pipe. No additional messages will be received on this pipe.
     */
    public void close();

    /**
     *  Gets the pipe type
     *
     * @return    The type
     */
    public String getType();

    /**
     *  Gets the pipe id
     *
     * @return    The type
     */
    public ID getPipeID();

    /**
     *  Gets the pipe name
     *
     * @return    The name
     */
    public String getName();

    /**
     *  Gets the pipe advertisement
     *
     * @return    The advertisement
     */
    public PipeAdvertisement getAdvertisement();
}