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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

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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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 * accompanied this code).

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package jdk.jfr.api.recording.state;

import java.time.Duration;

import java.time.Instant;

import jdk.jfr.Recording;

import jdk.jfr.RecordingState;

import jdk.test.lib.jfr.CommonHelper;

import jdk.test.lib.jfr.VoidFunction;

 * @test

 * @summary Test Recording state

 * @key jfr

 * @library /test/lib

 * @run main/othervm jdk.jfr.api.recording.state.TestStateScheduleStart

 */

public class TestStateScheduleStart {

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

        Recording r = new Recording();

        CommonHelper.verifyRecordingState(r, RecordingState.NEW);

        Instant start = Instant.now();

        r.scheduleStart(Duration.ofMillis(2000));

        System.out.println("Wait for recording to start: " + start);

        CommonHelper.waitForRecordingState(r, RecordingState.RUNNING);

        // Duration should be about 2000 ms.

        // Test servers vary too much in performance to make an accurate check.

        // We only check that we don't time out after 20 seconds.

        Instant started = Instant.now();

        long millis = Duration.between(start, started).toMillis();

        System.out.println("Recording started at " + started + ". Delta millis=" + millis + ", expeced about 2000");

        verifyIllegalState(() -> r.start(), "double start()");

        r.stop();

        CommonHelper.verifyRecordingState(r, RecordingState.STOPPED);

        r.close();

        CommonHelper.verifyRecordingState(r, RecordingState.CLOSED);

    }

    private static void verifyIllegalState(VoidFunction f, String msg) throws Throwable {

        CommonHelper.verifyException(f, msg, IllegalStateException.class);

    }

}