1 /* 2 * Copyright (c) 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 * @bug 4526754 26 * @summary Test Pipe scattering reads 27 * @key randomness 28 */ 29 30 import java.nio.channels.*; 31 import java.nio.*; 32 import java.util.Random; 33 34 public class ScatteringRead { 35 36 private static Random generator = new Random(); 37 38 public static void main(String[] args) throws Exception { 39 scScatter(); 40 } 41 42 private static void scScatter() throws Exception { 43 Pipe p = Pipe.open(); 44 Pipe.SinkChannel sink = p.sink(); 45 Pipe.SourceChannel source = p.source(); 46 sink.configureBlocking(false); 47 48 ByteBuffer outgoingdata = ByteBuffer.allocateDirect(30); 49 byte[] someBytes = new byte[30]; 50 generator.nextBytes(someBytes); 51 outgoingdata.put(someBytes); 52 outgoingdata.flip(); 53 54 int totalWritten = 0; 55 while (totalWritten < 30) { 56 int written = sink.write(outgoingdata); 57 if (written < 0) 58 throw new Exception("Write failed"); 59 totalWritten += written; 60 } 61 62 ByteBuffer[] bufs = new ByteBuffer[3]; 63 for(int i=0; i<3; i++) 64 bufs[i] = ByteBuffer.allocateDirect(10); 65 long numBytesRead = source.read(bufs); 66 if (numBytesRead < 30) 67 throw new Exception("Pipe test failed"); 68 sink.close(); 69 source.close(); 70 } 71 72 }