tcpnonblockingmessenger.java

jxme的一些相关程序,主要是手机上程序开发以及手机和计算机通信的一些程序资料,程序编译需要Ant支持

/************************************************************************
 *
 * $Id: TcpNonBlockingMessenger.java,v 1.2 2002/03/04 21:42:57 echtcherbina 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.impl.endpoint.tcp;

import java.net.*;
import java.io.*;
import java.util.*;
import org.apache.log4j.Category; import org.apache.log4j.Priority;

import net.jxta.document.MimeMediaType;
import net.jxta.endpoint.*;

import net.jxta.impl.endpoint.MessageImpl;
import net.jxta.impl.endpoint.MessageWireFormat;
import net.jxta.impl.endpoint.MessageWireFormatFactory;


/**
 * An EndpointMessenger allows to send Messages onto
 * its associated EndpointProtocol.
 *
 * @since       JXTA 1.0
 */

public class TcpNonBlockingMessenger implements EndpointMessenger {
    private static final Category LOG = Category.getInstance(TcpNonBlockingMessenger.class.getName());

    private static int id = 0;

    private EndpointAddress dstAddress = null;
    private EndpointAddress srcAddress = null;
    private TcpConnectionManager connManager = null;

    public TcpNonBlockingMessenger(EndpointAddress destaddr,
                                   TcpTransport p,
				   TcpConnectionManager connManager)
        throws IOException {

        this.dstAddress = (EndpointAddress) destaddr.clone();
        this.srcAddress = p.getPublicAddress();
	this.connManager = connManager;

        // Not much has to be done: the connection with the remote node
        // will happen only when the data will be sent.
        if (LOG.isEnabledFor(Priority.DEBUG)) LOG.debug("Constructor");
        if (LOG.isEnabledFor(Priority.DEBUG)) LOG.debug("   addr = " + destaddr.toString());

	// This is an optimization. Create if necessary the TcpConnection.
	TcpConnection conn = connManager.getTcpConnection (destaddr);
	if (conn == null) {
	    throw new IOException ();
	}
    }

    /**
     * Send a TransportMessage onto that link.
     *
     * @param message TransportMessage to be sent.
     */
    public void sendMessage(Message message) throws IOException {

        if (dstAddress == null) {
            if (LOG.isEnabledFor(Priority.DEBUG)) LOG.debug("sendMessage: no destination address");
            throw new IOException();
        }
        // Set the message with the appropriate src and dest address
        message.setDestinationAddress(dstAddress);
        message.setSourceAddress(srcAddress);

	TcpConnection conn = connManager.getTcpConnection (dstAddress);
	if (conn == null) {
	    throw new IOException ();
	}
	conn.sendMessage (message);
    }

    /**
     * Close this EndpointProtocol
     */
    public void close() {
    }
}