97 lines
3.6 KiB
Java
97 lines
3.6 KiB
Java
/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.lang.management.*;
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import java.util.*;
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import java.util.concurrent.*;
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import java.util.concurrent.atomic.*;
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/*
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* @test
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* @bug 6588467
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* @summary Basic test of ThreadInfo.isDaemon
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* @author Jeremy Manson
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*/
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public class ThreadDaemonTest {
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public static void main(String[] args) throws Exception {
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final int NUM_THREADS = 20;
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final String THREAD_PREFIX = "ThreadDaemonTest-";
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final CountDownLatch started = new CountDownLatch(NUM_THREADS);
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final CountDownLatch finished = new CountDownLatch(1);
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final AtomicReference<Exception> fail = new AtomicReference<>(null);
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Thread[] allThreads = new Thread[NUM_THREADS];
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ThreadMXBean mbean = ManagementFactory.getThreadMXBean();
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Random rand = new Random();
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for (int i = 0; i < NUM_THREADS; i++) {
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allThreads[i] = new Thread(new Runnable() {
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public void run() {
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try {
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started.countDown();
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finished.await();
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} catch (InterruptedException e) {
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fail.set(new Exception(
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"Unexpected InterruptedException"));
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}
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}
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}, THREAD_PREFIX + i);
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allThreads[i].setDaemon(rand.nextBoolean());
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allThreads[i].start();
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}
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started.await();
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try {
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ThreadInfo[] allThreadInfos = mbean.dumpAllThreads(false, false);
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int count = 0;
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for (int i = 0; i < allThreadInfos.length; i++) {
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String threadName = allThreadInfos[i].getThreadName();
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if (threadName.startsWith(THREAD_PREFIX)) {
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count++;
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String[] nameAndNumber = threadName.split("-");
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int threadNum = Integer.parseInt(nameAndNumber[1]);
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if (allThreads[threadNum].isDaemon() !=
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allThreadInfos[i].isDaemon()) {
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throw new RuntimeException(
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allThreads[threadNum] + " is not like " +
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allThreadInfos[i] + ". TEST FAILED.");
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}
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}
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}
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if (count != NUM_THREADS) {
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throw new RuntimeException("Wrong number of threads examined");
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}
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}
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finally { finished.countDown(); }
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for (int i = 0; i < NUM_THREADS; i++) {
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allThreads[i].join();
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}
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if (fail.get() != null) {
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throw fail.get();
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}
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}
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}
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