httpnonblockingmessenger.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: HttpNonBlockingMessenger.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.http;

import java.io.InputStream;
import java.net.URL;
import java.util.Vector;

import java.io.IOException;

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

import net.jxta.document.MimeMediaType;
import net.jxta.endpoint.EndpointAddress;
import net.jxta.endpoint.EndpointMessenger;
import net.jxta.endpoint.Message;

import net.jxta.impl.endpoint.Address;
import net.jxta.impl.endpoint.MessageImpl;
import java.io.ByteArrayOutputStream;
import net.jxta.impl.endpoint.MessageWireFormat;
import net.jxta.impl.endpoint.MessageWireFormatFactory;
import java.io.ByteArrayInputStream;

/**
 * An EndpointMessenger allows to send Messages onto
 * its associated EndpointProtocol.
 *
 * @since       JXTA 1.0
 **/
public class HttpNonBlockingMessenger implements EndpointMessenger {
    
    private static final Category LOG = Category.getInstance(HttpNonBlockingMessenger.class.getName());
    
    private EndpointAddress srcAddress = null;
    private EndpointAddress dstAddress = null;
    private HttpTransport proto = null;
    
    public HttpNonBlockingMessenger (EndpointAddress destAddr,
                                     HttpTransport p)
               throws IOException {

        if (destAddr == null) {
            if (LOG.isEnabledFor(Priority.DEBUG)) LOG.debug("destination address is null");
            throw new IllegalArgumentException( "destination address is null" );
        }

        if (LOG.isEnabledFor(Priority.DEBUG)) LOG.debug ("   opening a messenger for " + destAddr.toString());
        proto = p;
        dstAddress = (EndpointAddress) destAddr.clone();
        srcAddress = proto.getPublicAddress();
    }
    
    /**
     * Send a TransportMessage to the associated destination and
     * EndpointProtocol
     *
     * @param message Message to be sent.
     */
    public void sendMessage(Message message) throws IOException {
        
        if (LOG.isEnabledFor(Priority.DEBUG)) LOG.debug("sendMessage starts");
        
        // Set the message with the appropriate src and dest address
        message.setDestinationAddress(dstAddress);
        message.setSourceAddress(srcAddress);

        // Get the bytes from the message
        InputStream inputStream = null;
        try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            MessageWireFormatFactory.newMessageWireFormat( 
            new MimeMediaType( "text/xml" ) ).writeMessage(baos, message);
            baos.close();
            byte bytes[] = baos.toByteArray();
            inputStream = new ByteArrayInputStream(bytes);
        } catch (Exception e) {
            if (LOG.isEnabledFor(Priority.WARN)) LOG.warn("HTTP - send - cannot read outgoing message", e );
            throw new IOException("HTTP - send - cannot read outgoing message");
        }
        
        Vector msgBuffers = new Vector();
        
        int msgSize = 0;
        final int bufferSize = 4096;
        
        do {
            byte [] nextBuffer = new byte[bufferSize];
            
            int readLength = inputStream.read( nextBuffer );
            
            if( -1 == readLength )
                break;
            
            if( 0 == readLength )
                continue;
            
            if( readLength < bufferSize ) {
                byte [] anotherBuffer = new byte[readLength];
                System.arraycopy( nextBuffer, 0, anotherBuffer, 0, readLength );
                nextBuffer = anotherBuffer;
            }
            
            msgSize += nextBuffer.length;
            msgBuffers.addElement( nextBuffer );
        } while( true );
        
        // Build the url to send the message to and send it.
        try {
            String authority = dstAddress.getProtocolAddress();
            String host = authority;
            int port = 80;
            
            int sepAt = authority.lastIndexOf( ':' );
            if( -1 != sepAt ) {
                host = authority.substring( 0, sepAt );
                port = Integer.parseInt( authority.substring(sepAt + 1) );
            }
            
            URL url = new URL( "http", host, port, "/snd/" );
            
            proto.sendHttpPUT( url, msgBuffers.elements(), msgSize );
        } catch (Exception e) {
            if (LOG.isEnabledFor(Priority.WARN)) LOG.warn( "HttpNonBlockingMessenger: cannot send data ", e);
            throw new IOException( "HttpNonBlockingMessenger: cannot send data ");
        }
    }
    
    /**
     * Close this EndpointMessenger
     **/
    public void close() {
        // Nothing has to be done
    }
}