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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 * 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.filestream;

import java.io.IOException;

import java.nio.file.Files;

import java.nio.file.Path;

import java.util.IdentityHashMap;

import java.util.Map;

import java.util.concurrent.atomic.AtomicBoolean;

import jdk.jfr.Event;

import jdk.jfr.Recording;

import jdk.jfr.consumer.EventStream;

import jdk.jfr.consumer.RecordedEvent;

/**

 * @test

 * @summary Test EventStream::setReuse(...)

 * @key jfr

 * @requires vm.hasJFR

 * @library /test/lib

 * @run main/othervm jdk.jfr.api.consumer.filestream.TestReuse

 */

public class TestReuse {

    static class ReuseEvent extends Event {

    }

    private static final boolean[] BOOLEAN_STATES = { false, true };

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

        Path p = makeRecording();

        testSetReuseTrue(p);

        testSetReuseFalse(p);

    }

    private static void testSetReuseFalse(Path p) throws Exception {

        for (boolean ordered : BOOLEAN_STATES) {

            AtomicBoolean fail = new AtomicBoolean(false);

            Map<RecordedEvent, RecordedEvent> identity = new IdentityHashMap<>();

            try (EventStream es = EventStream.openFile(p)) {

                es.setOrdered(ordered);

                es.setReuse(false);

                es.onEvent(e -> {

                    if (identity.containsKey(e)) {

                        fail.set(true);

                        es.close();

                    }

                    identity.put(e, e);

                });

                es.start();

            }

            if (fail.get()) {

                throw new Exception("Unexpected reuse! Ordered = " + ordered);

            }

        }

    }

    private static void testSetReuseTrue(Path p) throws Exception {

        for (boolean ordered : BOOLEAN_STATES) {

            AtomicBoolean success = new AtomicBoolean(false);

            Map<RecordedEvent, RecordedEvent> events = new IdentityHashMap<>();

            try (EventStream es = EventStream.openFile(p)) {

                es.setOrdered(ordered);

                es.setReuse(true);

                es.onEvent(e -> {

                    if(events.containsKey(e)) {

                        success.set(true);;

                        es.close();

                    }

                    events.put(e,e);

                });

                es.start();

            }

            if (!success.get()) {

                throw new Exception("No reuse! Ordered = " + ordered);

            }

        }

    }

    private static Path makeRecording() throws IOException {

        try (Recording r = new Recording()) {

            r.start();

            for (int i = 0; i < 5; i++) {

                ReuseEvent e = new ReuseEvent();

                e.commit();

            }

            Recording rotation = new Recording();

            rotation.start();

            for (int i = 0; i < 5; i++) {

                ReuseEvent e = new ReuseEvent();

                e.commit();

            }

            r.stop();

            rotation.close();

            Path p = Files.createTempFile("recording", ".jfr");

            r.dump(p);

            return p;

        }

    }

}