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/*
* Copyright (c) 2007, 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 4708197 6497629
* @summary Test for max priority setting that matches spec
* @author Pete Soper
*/
public class SetMaxPriority {
public static void main(String args[]) throws Exception {
ThreadGroup tg = new ThreadGroup("foo");
ThreadGroup ptg = tg.getParent();
int currentMaxPriority = tg.getMaxPriority();
int halfMaxPriority = ptg.getMaxPriority() / 2;
if (halfMaxPriority - Thread.MIN_PRIORITY < 2) {
throw new RuntimeException("SetMaxPriority test no longer valid: starting parent max priority too close to Thread.MIN_PRIORITY");
}
tg.setMaxPriority(halfMaxPriority - 2);
currentMaxPriority = tg.getMaxPriority();
if (currentMaxPriority != halfMaxPriority - 2) {
throw new RuntimeException("SetMaxPriority failed: max priority not changed");
}
// This will fail if bug 6497629 is present because the min tests is
// being made with the (just lowered) max instead of the parent max,
// preventing the priority from being moved back up.
tg.setMaxPriority(currentMaxPriority + 1);
int newMaxPriority = tg.getMaxPriority();
if (newMaxPriority != currentMaxPriority + 1) {
throw new RuntimeException("SetMaxPriority failed: defect 6497629 present");
}
// Confirm that max priorities out of range on both ends have no
// effect.
for (int badPriority : new int[] {Thread.MIN_PRIORITY - 1,
Thread.MAX_PRIORITY + 1}) {
int oldPriority = tg.getMaxPriority();
tg.setMaxPriority(badPriority);
if (oldPriority != tg.getMaxPriority())
throw new RuntimeException(
"setMaxPriority bad arg not ignored as specified");
}
System.out.println("SetMaxPriority passed");
}
}
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