/*

 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

 * 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,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package jdk.jfr.api.consumer.recordingstream;

import java.util.concurrent.CountDownLatch;

import java.util.concurrent.atomic.AtomicBoolean;

import jdk.jfr.Event;

import jdk.jfr.consumer.RecordingStream;

/**

 * @test

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

 * @key jfr

 * @requires vm.hasJFR

 * @library /test/lib

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

 */

public class TestOnClose {

    private static class CloseEvent extends Event {

    }

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

        testOnCloseNull();

        testOnClosedUnstarted();

        testOnClosedStarted();

    }

    private static void testOnCloseNull() {

       try (RecordingStream rs = new RecordingStream()) {

          try {

              rs.onClose(null);

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

          } catch (NullPointerException npe) {

              // OK; as expected

          }

       }

    }

    private static void testOnClosedStarted() throws InterruptedException {

        AtomicBoolean onClose = new AtomicBoolean(false);

        CountDownLatch event = new CountDownLatch(1);

        try (RecordingStream r = new RecordingStream()) {

            r.onEvent(e -> {

                event.countDown();

            });

            r.onClose(() -> {

                onClose.set(true);

            });

            r.startAsync();

            CloseEvent c = new CloseEvent();

            c.commit();

            event.await();

        }

        if (!onClose.get()) {

            throw new AssertionError("OnClose was not called");

        }

    }

    private static void testOnClosedUnstarted() {

        AtomicBoolean onClose = new AtomicBoolean(false);

        try (RecordingStream r = new RecordingStream()) {

            r.onClose(() -> {

                onClose.set(true);

            });

        }

        if (!onClose.get()) {

            throw new AssertionError("OnClose was not called");

        }

    }

}