| /* |
| * Copyright (c) 2015, 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. |
| */ |
| |
| import java.lang.management.*; |
| import java.util.*; |
| import java.util.concurrent.*; |
| import java.util.concurrent.atomic.*; |
| |
| /* |
| * @test |
| * @bug 6588467 |
| * @summary Basic test of ThreadInfo.isDaemon |
| * @author Jeremy Manson |
| */ |
| public class ThreadDaemonTest { |
| |
| public static void main(String[] args) throws Exception { |
| final int NUM_THREADS = 20; |
| final String THREAD_PREFIX = "ThreadDaemonTest-"; |
| |
| final CountDownLatch started = new CountDownLatch(NUM_THREADS); |
| final CountDownLatch finished = new CountDownLatch(1); |
| final AtomicReference<Exception> fail = new AtomicReference<>(null); |
| |
| Thread[] allThreads = new Thread[NUM_THREADS]; |
| ThreadMXBean mbean = ManagementFactory.getThreadMXBean(); |
| Random rand = new Random(); |
| |
| for (int i = 0; i < NUM_THREADS; i++) { |
| allThreads[i] = new Thread(new Runnable() { |
| public void run() { |
| try { |
| started.countDown(); |
| finished.await(); |
| } catch (InterruptedException e) { |
| fail.set(new Exception( |
| "Unexpected InterruptedException")); |
| } |
| } |
| }, THREAD_PREFIX + i); |
| allThreads[i].setDaemon(rand.nextBoolean()); |
| allThreads[i].start(); |
| } |
| |
| started.await(); |
| try { |
| ThreadInfo[] allThreadInfos = mbean.dumpAllThreads(false, false); |
| int count = 0; |
| for (int i = 0; i < allThreadInfos.length; i++) { |
| String threadName = allThreadInfos[i].getThreadName(); |
| if (threadName.startsWith(THREAD_PREFIX)) { |
| count++; |
| String[] nameAndNumber = threadName.split("-"); |
| int threadNum = Integer.parseInt(nameAndNumber[1]); |
| if (allThreads[threadNum].isDaemon() != |
| allThreadInfos[i].isDaemon()) { |
| throw new RuntimeException( |
| allThreads[threadNum] + " is not like " + |
| allThreadInfos[i] + ". TEST FAILED."); |
| } |
| } |
| } |
| if (count != NUM_THREADS) { |
| throw new RuntimeException("Wrong number of threads examined"); |
| } |
| } |
| finally { finished.countDown(); } |
| |
| for (int i = 0; i < NUM_THREADS; i++) { |
| allThreads[i].join(); |
| } |
| if (fail.get() != null) { |
| throw fail.get(); |
| } |
| } |
| } |