1 /*
   2  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23  
  24 package com.oracle.java.testlibrary;
  25  
  26 import java.io.OutputStream;
  27 import java.io.InputStream;
  28 import java.io.IOException;
  29 
  30 public class StreamPumper extends Thread {
  31 
  32     private static final int BUF_SIZE = 256;
  33 
  34     private OutputStream sout;
  35     private InputStream sin;
  36 
  37 
  38     /**
  39      * Create a StreamPumper that reads from in and writes to out.
  40      *
  41      * @param in  The stream to read from.
  42      * @param out The stream to write to.
  43      */
  44     public StreamPumper(InputStream in, OutputStream out) {
  45         this.sin = in;
  46         this.sout = out;
  47     }
  48 
  49     /**
  50      * Implements Thread.run(). Continuously read from <code>sin</code> and
  51      * write to <code>sout</code> until <code>sin</code> has reached end of
  52      * stream. Abort on interruption. Abort on IOExceptions.
  53      */
  54     @Override
  55     public void run() {
  56         int length;
  57         try {
  58             byte[] buffer = new byte[BUF_SIZE];
  59             InputStream localIn = sin;
  60             OutputStream localOut = sout;
  61             while ((length = localIn.read(buffer)) > 0
  62                    && !Thread.interrupted()) {
  63                 localOut.write(buffer, 0, length);
  64             }
  65             localOut.flush();
  66         } catch (IOException e) {
  67             // Just abort if something like this happens.
  68         }
  69     }
  70 }