1 /*
   2  * Copyright (c) 2000, 2001, 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 /* @test
  25  * @summary Test reading and writing from Pipes
  26  * @key randomness
  27  */
  28 
  29 import java.io.*;
  30 import java.nio.ByteBuffer;
  31 import java.nio.channels.*;
  32 import java.nio.channels.spi.SelectorProvider;
  33 import java.util.Random;
  34 
  35 
  36 /**
  37  * Testing PipeChannel
  38  */
  39 public class PipeChannel {
  40 
  41    private static Random generator = new Random();
  42 
  43     public static void main(String[] args) throws Exception {
  44         for (int x=0; x<100; x++) {
  45             SelectorProvider sp = SelectorProvider.provider();
  46             Pipe p = sp.openPipe();
  47             Pipe.SinkChannel sink = p.sink();
  48             Pipe.SourceChannel source = p.source();
  49 
  50             ByteBuffer outgoingdata = ByteBuffer.allocateDirect(10);
  51             byte[] someBytes = new byte[10];
  52             generator.nextBytes(someBytes);
  53             outgoingdata.put(someBytes);
  54             outgoingdata.flip();
  55 
  56             int totalWritten = 0;
  57             while (totalWritten < 10) {
  58                 int written = sink.write(outgoingdata);
  59                 if (written < 0)
  60                     throw new Exception("Write failed");
  61                 totalWritten += written;
  62             }
  63 
  64             ByteBuffer incomingdata = ByteBuffer.allocateDirect(10);
  65             int totalRead = 0;
  66             do {
  67                 int bytesRead = source.read(incomingdata);
  68                 if (bytesRead > 0)
  69                     totalRead += bytesRead;
  70             } while(totalRead < 10);
  71 
  72             for(int i=0; i<10; i++)
  73                 if (outgoingdata.get(i) != incomingdata.get(i))
  74                     throw new Exception("Pipe failed");
  75             sink.close();
  76             source.close();
  77         }
  78     }
  79 }