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 * 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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,

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package jdk.jfr.api.consumer.recordingstream;

import java.util.concurrent.CountDownLatch;

import jdk.jfr.Event;

import jdk.jfr.Name;

import jdk.jfr.consumer.RecordingStream;

/**

 * @test

 * @summary Tests RecordingStream::onEvent(...)

 * @key jfr

 * @requires vm.hasJFR

 * @run main/othervm jdk.jfr.api.consumer.recordingstream.TestOnEvent

 */

public class TestOnEvent {

    @Name("A")

    static class EventA extends Event {

    }

    @Name("A")

    static class EventAlsoA extends Event {

    }

    @Name("C")

    static class EventC extends Event {

    }

    public static void main(String... args) throws Exception {

        testOnEventNull();

        testOnEvent();

        testNamedEvent();

        testTwoEventWithSameName();

    }

    private static void testOnEventNull() {

        log("Entering testOnEventNull()");

        try (RecordingStream rs = new RecordingStream()) {

           try {

               rs.onEvent(null);

               throw new AssertionError("Expected NullPointerException from onEvent(null)");

           } catch (NullPointerException npe) {

               // OK; as expected

           }

           try {

               rs.onEvent("A", null);

               throw new AssertionError("Expected NullPointerException from onEvent(\"A\", null)");

           } catch (NullPointerException npe) {

               // OK; as expected

           }

           try {

               String s = null;

               rs.onEvent(s, null);

               throw new AssertionError("Expected NullPointerException from onEvent(null, null)");

           } catch (NullPointerException npe) {

               // OK; as expected

           }

        }

        log("Leaving testOnEventNull()");

     }

    private static void testTwoEventWithSameName() throws Exception {

        log("Entering testTwoEventWithSameName()");

        CountDownLatch eventA = new CountDownLatch(2);

        try (RecordingStream r = new RecordingStream()) {

            r.onEvent("A", e -> {

                System.out.println("testTwoEventWithSameName" +  e);

                eventA.countDown();

            });

            r.startAsync();

            EventA a1 = new EventA();

            a1.commit();

            EventAlsoA a2 = new EventAlsoA();

            a2.commit();

            eventA.await();

        }

        log("Leaving testTwoEventWithSameName()");

    }

    private static void testNamedEvent() throws Exception {

        log("Entering testNamedEvent()");

        try (RecordingStream r = new RecordingStream()) {

            CountDownLatch eventA = new CountDownLatch(1);

            CountDownLatch eventC = new CountDownLatch(1);

            r.onEvent("A", e -> {

                System.out.println("TestNamedEvent:" + e);

                if (e.getEventType().getName().equals("A")) {

                    eventA.countDown();

                }

            });

            r.onEvent("C", e -> {

                System.out.println("TestNamedEvent:" + e);

                if (e.getEventType().getName().equals("C")) {

                    eventC.countDown();

                }

            });

            r.startAsync();

            EventA a = new EventA();

            a.commit();

            EventC c = new EventC();

            c.commit();

            eventA.await();

            eventC.await();

        }

        log("Leaving testNamedEvent()");

    }

    private static void testOnEvent() throws Exception {

        log("Entering testOnEvent()");

        try (RecordingStream r = new RecordingStream()) {

            CountDownLatch event = new CountDownLatch(1);

            r.onEvent(e -> {

                event.countDown();

            });

            r.startAsync();

            EventA a = new EventA();

            a.commit();

            event.await();

        }

        log("Leaving testOnEvent()");

    }

    private static void log(String msg) {

        System.out.println(msg);

    }

}