httpclientmessenger.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: HttpClientMessenger.java,v 1.3 2002/05/01 17:40:42 hamada 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.servlethttp;

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

import java.io.*;
import java.net.*;

import org.apache.log4j.Category;
import org.apache.log4j.Priority;

/**
 * Simple messenger that simply posts a message to a URL.
 * URL/HttpURLConnection is used, so (depending on your JDK) you will get
 * reasonably good persistent connection management.
 */

public class HttpClientMessenger implements EndpointMessenger {

	private URL url = null;
	private HttpClientMessageSender sender = null;
	private EndpointAddress destAddress = null;
	private EndpointAddress localAddress = null;

	/** constructs the messenger.
	 *  @param url The URL of where we're going to send the message. This
	 *      may be the final destination, or it may be an intermediary.
	 *  @param localAddress the local peer's address. this is the source
	 *      address for the message.
	 *  @param destAddress the destination peer address. This is the dest
	 *      address for the message.
	 */
	public HttpClientMessenger (HttpClientMessageSender sender,
	                            URL url,
	                            EndpointAddress localAddress,
	                            EndpointAddress destAddress)
	throws IOException {

		this.sender = sender;
		this.url = url;
		this.destAddress = (EndpointAddress) destAddress.clone();
		this.localAddress = (EndpointAddress) localAddress.clone();

		// This is an optimization. Create if necessary the HttpClientConnection.
		HttpClientConnection conn = sender.getHttpClientConnection (url);
		if (conn == null) {
			throw new IOException ("Unable to obtain a HttpClientConnection to"+url.toString());
		}
	}

	/*
	 * Send messages. Messages are queued and processed by a thread
	 * running HttpClientConnection.
	 */
	public void sendMessage (Message msg) throws IOException {

		// puts the address information into the message
		msg.setDestinationAddress (destAddress);
		msg.setSourceAddress (localAddress);

		// Get the HttpClientConnection
		HttpClientConnection conn = sender.getHttpClientConnection (url);
		if (conn == null) {
			throw new IOException ("Unable to obtain a HttpClientConnection to"+url.toString());
		}
		conn.sendMessage (msg);
	}

	/**
	 * The URL/HttpURLConnection takes care of the details
	 */
	public void close() {
		// no code intended
	}
}