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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * 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).

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package jdk.jfr.event.runtime;

import static jdk.test.lib.Asserts.assertTrue;

import java.lang.management.ManagementFactory;

import java.lang.management.ThreadMXBean;

import java.time.Duration;

import java.util.List;

import jdk.jfr.Recording;

import jdk.jfr.consumer.RecordedEvent;

import jdk.test.lib.jfr.EventNames;

import jdk.test.lib.jfr.Events;

 * @test

 * @key jfr

 * @library /test/lib

 *

 * @run main/othervm jdk.jfr.event.runtime.TestJavaThreadStatisticsEventBean

 */

public class TestJavaThreadStatisticsEventBean {

    private final static String EVENT_NAME = EventNames.JavaThreadStatistics;

    // Compare JFR thread counts to ThreadMXBean counts

    public static void main(String[] args) throws Throwable {

        long mxDaemonCount = -1;

        long mxActiveCount = -1;

        // Loop until we are sure no threads were started during the recording.

        Recording recording = null;

        ThreadMXBean mxBean = ManagementFactory.getThreadMXBean();

        long totalCountBefore = -1;

        while (totalCountBefore != mxBean.getTotalStartedThreadCount()) {

            recording = new Recording();

            recording.enable(EVENT_NAME).withThreshold(Duration.ofMillis(10));

            totalCountBefore = mxBean.getTotalStartedThreadCount();

            recording.start();

            mxDaemonCount = mxBean.getDaemonThreadCount();

            mxActiveCount = mxBean.getThreadCount();

            recording.stop();

            final String msg = "testCountByMXBean: threadsBefore=%d, threadsAfter=%d%n";

            System.out.format(msg, totalCountBefore, mxBean.getTotalStartedThreadCount());

        }

        List<RecordedEvent> events= Events.fromRecording(recording);

        boolean isAnyFound = false;

        for (RecordedEvent event : events) {

            System.out.println("Event:" + event);

            isAnyFound = true;

            Events.assertField(event, "daemonCount").equal(mxDaemonCount);

            Events.assertField(event, "activeCount").equal(mxActiveCount);

            Events.assertField(event, "accumulatedCount").atLeast(mxActiveCount);

            Events.assertField(event, "peakCount").atLeast(mxActiveCount);

        }

        assertTrue(isAnyFound, "Correct event not found");

    }

}