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/*
* Copyright (c) 2001, 2018, 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.
*/
package nsk.share;
/**
* Harakiri is used to terminate a stress test with PASS exit status
* before the test is terminated as timed out (and so failed).
*
* <p>Harakiri class holds a thread which sleeps for the given amount
* of time, and then wakes up and executes <tt>System.exit()</tt>
* with the given exit status. That thread is daemon, so it doesn't
* prevent application from exiting once all its threads finish
* before it's time for harakiri. Appointing harakiri in zero
* delay implies immediate <tt>exit()</tt>.
*
* <p>There is a limitation: you may appoint no more than one harakiri
* per application.
*/
public class Harakiri {
/**
* Use specific <tt>appoint()</tt> method to appoint harakiri.
*
* @see #appoint(int)
* @see #appoint(int,int)
*/
protected Harakiri() {}
/**
* One harakiri per application, or <tt>null</tt> (by default).
*/
private static Thread harakiri = null;
/**
* <p>Return timeout (or waittime) value munus the margin
* value (which is assumed 1 minute by default).
*
* <p>Treat <tt>args[0]</tt> as <tt>$TIMEOUT</tt> value, or seek for
* <tt>-waittime=$WAITTIME</tt> value. If both parameters
* (or either none of them) are assigned, throw an exception to
* report parameters inconsistency.
*
* <p>Also, seek for <tt>-margin=...</tt> assignment, or assume margin
* is 1 minute.
*
* @param args Is usually obtained via the application's command-line.
*
* @throws IllegalArgumentException If <tt>args[]</tt> is inconsistent.
*
* @see #appoint(int)
* @see #appoint(int,int)
*/
public static int parseAppointment(String args[]) {
int timeout=-1, margin=1;
int timeouts=0, waittimes=0, margins=0;
for (int i=0; i<args.length; i++) {
if (args[i].startsWith("-")) {
if (args[i].startsWith("-waittime=")) {
timeout = Integer.parseInt(args[i].substring(10));
waittimes++;
}
if (args[i].startsWith("-margin=")) {
margin = Integer.parseInt(args[i].substring(8));
margins++;
}
} else {
if (i == 0) {
timeout = Integer.parseInt(args[i]);
timeouts++;
}
}
};
if (timeouts==0 && waittimes==0)
throw new IllegalArgumentException(
"no $TIMEOUT, nor -waittime=$WAITTIME is set");
if (waittimes > 1)
throw new IllegalArgumentException(
"more than one -waittime=... is set");
if (margins > 1)
throw new IllegalArgumentException(
"more than one -margin=... is set");
int result = timeout - margin;
if (result <= 0)
throw new IllegalArgumentException(
"delay appointment must be greater than "+margin+" minutes");
return result;
}
/**
* Appoint harakiri after the given amount of <tt>minutes</tt>,
* so that exit status would be 95 (to simulate JCK-like PASS
* status).
*
* @throws IllegalStateException If harakiri is already appointed.
*
* @see #appoint(int,int)
* @see #parseAppointment(String[])
*/
public static void appoint(int minutes) {
appoint(minutes,95); // JCK-like PASS status
}
/**
* Appoint Harakiri for the given amount of <tt>minutes</tt>,
* so that the given <tt>status</tt> would be exited when time
* is over.
*
* @throws IllegalStateException If harakiri is already appointed.
*
* @see #appoint(int)
* @see #parseAppointment(String[])
*/
public static void appoint(int minutes, int status) {
if (harakiri != null)
throw new IllegalStateException("Harakiri is already appointed.");
final long timeToExit = System.currentTimeMillis() + 60*1000L*minutes;
final int exitStatus = status;
harakiri = new Thread(Harakiri.class.getName()) {
public void run() {
long timeToSleep = timeToExit - System.currentTimeMillis();
if (timeToSleep > 0)
try {
//
// Use wait() instead of sleep(), because Java 2
// specification doesn't guarantee the method
// sleep() to yield to other threads.
//
Object someDummyObject = new Object();
synchronized (someDummyObject) {
someDummyObject.wait(timeToSleep);
}
} catch (InterruptedException exception) {
exception.printStackTrace(System.err);
//
// OOPS, the dagger for harakiri looks broken:
//
return;
};
//
// OK, lets do it now:
//
System.err.println(
"#\n# Harakiri: prescheduled program termination.\n#");
System.exit(exitStatus); // harakiri to all threads
}
};
harakiri.setPriority(Thread.MAX_PRIORITY);
harakiri.setDaemon(true);
harakiri.start();
}
}
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