www.pudn.com > 20049791944754.zip > DeluxeWorker.java

/* License
 * 
 * Copyright 1994-2004 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:
 *  
 *  * Redistribution of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 * 
 *  * Redistribution 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.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *  
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *  
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility. 
 */

import java.io.*; 
 
import javax.microedition.io.*; 
import javax.microedition.lcdui.*; 
 
public class DeluxeWorker extends Thread { 
  private DeluxeMIDlet mMIDlet; 
  private WaitCanvas mWaitCanvas; 
  private String mURL; 
  private HttpConnection mHttpConnection; 
  private boolean mTrucking, mCancel; 
   
  public DeluxeWorker(DeluxeMIDlet midlet, WaitCanvas waitCanvas, String url) { 
    mMIDlet = midlet; 
    mWaitCanvas = waitCanvas; 
    mURL = url; 
    mTrucking = true; 
    mCancel = false; 
  } 
   
  public synchronized void run() { 
    while (mTrucking) { 
      try { wait(); } 
      catch (InterruptedException ie) {} 
      if (mTrucking) connect(); 
    } 
  } 
   
  public synchronized void go() { 
    notify(); 
  } 
   
  public void cancel() { 
    try { 
      mCancel = true; 
      if (mHttpConnection != null) 
        mHttpConnection.close(); 
    } 
    catch (IOException ignored) {} 
  } 
   
  public synchronized void stop() { 
    mTrucking = false; 
    notify(); 
  } 
   
  private void connect() { 
    InputStream in = null; 
 
    try { 
      // Query the server and retrieve the response. 
      mWaitCanvas.setMessage("Sending..."); 
      mHttpConnection = (HttpConnection)Connector.open(mURL); 
      mHttpConnection.setRequestProperty("Connection", "close"); 
      in = mHttpConnection.openInputStream(); 
       
      // Pull back the server's response. If a content length is not 
      // specified, we'll just read 255 bytes. 
      mWaitCanvas.setMessage("Receiving..."); 
      int contentLength = (int)mHttpConnection.getLength(); 
      if (contentLength == -1) contentLength = 255; 
      byte[] raw = new byte[contentLength]; 
      int length = in.read(raw); 
 
      // Clean up. 
      in.close(); 
      mHttpConnection.close(); 
 
      // Show the response to the user. 
      String s = new String(raw, 0, length); 
      mMIDlet.networkResponse(s); 
    } 
    catch (IOException ioe) { 
      if (mCancel == false) { 
        try { 
          if (in != null) in.close(); 
          if (mHttpConnection != null) mHttpConnection.close(); 
        } 
        catch (IOException ignored) {} 
        mMIDlet.networkException(ioe); 
      } 
      mCancel = false; 
    } 
  } 
}