/*
* Copyright (c) 2003, 2006, 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.
*/
/*
* Utility class for ThreadMXBean tests
*/
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadMXBean;
public class Utils {
private static final ThreadMXBean tm = ManagementFactory.getThreadMXBean();
private static final int MAX_RETRY = 200;
public static boolean waitForBlockWaitingState(Thread t) {
// wait for the thread to transition to the expected state
int retryCount=0;
while (t.getState() == Thread.State.RUNNABLE && retryCount < MAX_RETRY) {
goSleep(100);
retryCount++;
}
return (t.getState() != Thread.State.RUNNABLE);
}
public static boolean waitForThreadState(Thread t, Thread.State expected) {
// wait for the thread to transition to the expected state
int retryCount=0;
while (t.getState() != expected && retryCount < MAX_RETRY) {
goSleep(100);
retryCount++;
}
return (t.getState() == expected);
}
public static void checkThreadState(Thread t, Thread.State expected) {
waitForThreadState(t, expected);
Thread.State state = tm.getThreadInfo(t.getId()).getThreadState();
if (state == null) {
throw new RuntimeException(t.getName() + " expected to have " +
expected + " but got null.");
}
if (state != expected) {
t.dumpStack();
throw new RuntimeException(t.getName() +
" expected to have " + expected + " but got " + state);
}
}
public static void goSleep(long ms) {
try {
Thread.sleep(ms);
} catch (InterruptedException e) {
e.printStackTrace();
System.out.println("TEST FAILED: Unexpected exception.");
throw new RuntimeException(e);
}
}
}