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