77 lines
2.5 KiB
Java
77 lines
2.5 KiB
Java
/*
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* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 4619744
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* @summary Test that Process input/out can be concurrently read/written
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* @author kladko
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*/
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import java.io.InputStream;
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import java.io.OutputStream;
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public class ConcurrentRead {
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static volatile Exception savedException;
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public static void main(String[] args) throws Exception {
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if (! UnixCommands.isUnix) {
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System.out.println("For UNIX only");
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return;
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}
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UnixCommands.ensureCommandsAvailable("tee");
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Process p = Runtime.getRuntime().exec(UnixCommands.tee());
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OutputStream out = p.getOutputStream();
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InputStream in = p.getInputStream();
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Thread t1 = new WriterThread(out, in);
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t1.start();
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Thread t2 = new WriterThread(out, in);
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t2.start();
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t1.join();
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t2.join();
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if (savedException != null)
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throw savedException;
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}
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static class WriterThread extends Thread {
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OutputStream out;
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InputStream in;
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WriterThread(OutputStream out, InputStream in) {
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this.out = out;
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this.in = in;
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}
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public void run(){
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try {
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out.write('a');
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out.flush();
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if (in.read() == -1) // got end-of-stream
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throw new Exception("End of stream in writer thread");
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} catch (Exception e) {
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savedException = e;
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}
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}
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}
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}
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