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package jdk.jfr.api.recording.state;

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

import jdk.jfr.FlightRecorder;
import jdk.jfr.FlightRecorderListener;
import jdk.jfr.Recording;

/*
 * @test
 * @summary Test Recording state with concurrent recordings
 * @key jfr
 * @library /test/lib
 * @run main/othervm jdk.jfr.api.recording.state.TestStateIdenticalListeners
 */
public class TestStateIdenticalListeners {

    public static void main(String[] args) throws Throwable {
        TestListener testListener = new TestListener();
        // Add the same listener twice
        FlightRecorder.addListener(testListener);
        FlightRecorder.addListener(testListener);

        // Start recording
        Recording recording = new Recording();
        recording.start();
        recording.stop();

        // We expect 4 notifications in total: 1 RUNNING and 1 STOPPED
        // notification for each listener registration
        // NOT 2 notifications: we have added the same listener again
        assertEquals(4, testListener.notificationCount, "Expected 2 notifications, got " + testListener.notificationCount);

        System.out.println("Test Passed");
        recording.close();
    }

    private static class TestListener implements FlightRecorderListener {
        private int notificationCount;

        @Override
        public void recordingStateChanged(Recording recording) {
            System.out.println("recordingStateChanged: " + " recording: " + recording + " state: " + recording.getState());
            ++notificationCount;
        }
    }
}