/*

 * 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.CompletableFuture;

import java.util.concurrent.CountDownLatch;

import java.util.concurrent.atomic.AtomicLong;

import jdk.jfr.Event;

import jdk.jfr.consumer.RecordingStream;

/**

 * @test

 * @summary Tests RecordingStream::close()

 * @key jfr

 * @requires vm.hasJFR

 * @library /test/lib

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

 */

public class TestClose {

    private static class CloseEvent extends Event {

    }

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

        testCloseUnstarted();

        testCloseStarted();

        testCloseTwice();

        testCloseStreaming();

        testCloseMySelf();

    }

    private static void testCloseMySelf() throws Exception {

        CountDownLatch l1 = new CountDownLatch(1);

        CountDownLatch l2 = new CountDownLatch(1);

        RecordingStream r = new RecordingStream();

        r.onEvent(e -> {

            try {

                l1.await();

                r.close();

                l2.countDown();

            } catch (InterruptedException ie) {

                throw new Error(ie);

            }

        });

        r.startAsync();

        CloseEvent c = new CloseEvent();

        c.commit();

        l1.countDown();

        l2.await();

    }

    private static void testCloseStreaming() throws Exception {

        CountDownLatch streaming = new CountDownLatch(1);

        RecordingStream r = new RecordingStream();

        AtomicLong count = new AtomicLong();

        r.onEvent(e -> {

                streaming.countDown();

            }

        });

        r.startAsync();

        var streamingLoop = CompletableFuture.runAsync(() -> {

            while (true) {

                CloseEvent c = new CloseEvent();

                c.commit();

            }

        });

        streaming.await();

        r.close();

        streamingLoop.cancel(true);

    }

    private static void testCloseStarted() {

        RecordingStream r = new RecordingStream();

        r.startAsync();

        r.close();

    }

    private static void testCloseUnstarted() {

        RecordingStream r = new RecordingStream();

        r.close();

    }

    private static void testCloseTwice() {

        RecordingStream r = new RecordingStream();

        r.startAsync();

        r.close();

        r.close();

    }

}