ConcurrentRead.java revision 2362
0N/A/*
624N/A * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
0N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
0N/A * or visit www.oracle.com if you need additional information or have any
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0N/A */
0N/A
0N/A/**
0N/A * @test
304N/A * @bug 4619744
0N/A * @summary Test that Process input/out can be concurrently read/written
0N/A * @author kladko
0N/A */
0N/A
0N/Aimport java.io.InputStream;
0N/Aimport java.io.OutputStream;
0N/Aimport java.io.File;
0N/Aimport java.io.IOException;
0N/A
0N/Apublic class ConcurrentRead {
0N/A
0N/A static volatile Exception savedException;
0N/A static final String TEE = "/usr/bin/tee";
0N/A
0N/A public static void main(String[] args) throws Exception {
0N/A
0N/A if (File.separatorChar == '\\' || // Windows
0N/A !new File(TEE).exists()) // no tee
0N/A return;
0N/A
0N/A Process p = Runtime.getRuntime().exec(TEE);
0N/A OutputStream out = p.getOutputStream();
0N/A InputStream in = p.getInputStream();
0N/A Thread t1 = new WriterThread(out, in);
0N/A t1.start();
0N/A Thread t2 = new WriterThread(out, in);
0N/A t2.start();
0N/A t1.join();
0N/A t2.join();
0N/A if (savedException != null)
0N/A throw savedException;
0N/A }
0N/A
0N/A static class WriterThread extends Thread {
0N/A OutputStream out;
0N/A InputStream in;
0N/A WriterThread(OutputStream out, InputStream in) {
0N/A this.out = out;
0N/A this.in = in;
0N/A }
0N/A public void run(){
0N/A try {
304N/A out.write('a');
304N/A out.flush();
0N/A if (in.read() == -1) // got end-of-stream
0N/A throw new Exception("End of stream in writer thread");
0N/A } catch (Exception e) {
0N/A savedException = e;
304N/A }
304N/A }
304N/A }
304N/A}
304N/A