www.pudn.com > jnp-src.rar > MultiplexOutputStream.java

/*
 * Java Network Programming, Second Edition
 * Merlin Hughes, Michael Shoffner, Derek Hamner
 * Manning Publications Company; ISBN 188477749X
 *
 * http://nitric.com/jnp/
 *
 * Copyright (c) 1997-1999 Merlin Hughes, Michael Shoffner, Derek Hamner;
 * all rights reserved; see license.txt for details.
 */

import java.io.*; 
 
public class MultiplexOutputStream extends MessageOutput { 
  protected MessageOutput messageOut; 
  protected ByteArrayOutputStream byteArrayOut; 
  protected String label; 
 
  public MultiplexOutputStream (MessageOutput messageOut, String label) { 
    super (new ByteArrayOutputStream ()); 
    byteArrayOut = (ByteArrayOutputStream) out; 
    this.messageOut = messageOut; 
    this.label = label; 
  } 
 
  public void send () throws IOException { 
    synchronized (messageOut) { 
      messageOut.writeUTF (label); 
      byteArrayOut.writeTo (messageOut); 
      messageOut.send (); 
    } 
    byteArrayOut.reset (); 
  } 
 
  public void send (String[] dsts) throws IOException { 
    synchronized (messageOut) { 
      messageOut.writeUTF (label); 
      byteArrayOut.writeTo (messageOut); 
      messageOut.send (dsts); 
    } 
    byteArrayOut.reset (); 
  } 
}