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

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 * 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.event.io;

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

import java.io.File;

import java.io.RandomAccessFile;

import java.nio.ByteBuffer;

import java.nio.channels.FileChannel;

import java.time.Duration;

import java.util.ArrayList;

import java.util.List;

import jdk.jfr.Recording;

import jdk.jfr.consumer.RecordedEvent;

import jdk.test.lib.jfr.Events;

/*

 * @test

 * @key jfr

 * @library /test/lib /test/jdk

 * @run main/othervm jdk.jfr.event.io.TestFileChannelEvents

 */

public class TestFileChannelEvents {

    public static void main(String[] args) throws Throwable {

        File tmp = File.createTempFile("TestFileChannelEvents", ".tmp", new File("."));

        tmp.deleteOnExit();

        Recording recording = new Recording();

        List<IOEvent> expectedEvents = new ArrayList<>();

        try (RandomAccessFile rf = new RandomAccessFile(tmp, "rw"); FileChannel ch = rf.getChannel();) {

            recording.enable(IOEvent.EVENT_FILE_FORCE).withThreshold(Duration.ofMillis(0));

            recording.enable(IOEvent.EVENT_FILE_READ).withThreshold(Duration.ofMillis(0));

            recording.enable(IOEvent.EVENT_FILE_WRITE).withThreshold(Duration.ofMillis(0));

            recording.start();

            ByteBuffer bufA = ByteBuffer.allocateDirect(10);

            ByteBuffer bufB = ByteBuffer.allocateDirect(20);

            bufA.put("1234567890".getBytes());

            bufB.put("1234567890".getBytes());

            // test write(ByteBuffer)

            bufA.flip();

            long size = ch.write(bufA);

            expectedEvents.add(IOEvent.createFileWriteEvent(size, tmp));

            // test write(ByteBuffer, long)

            bufA.flip();

            size = ch.write(bufA, bufA.capacity() / 2);

            expectedEvents.add(IOEvent.createFileWriteEvent(size, tmp));

            // test write(ByteBuffer[])

            bufA.flip();

            bufA.limit(5);

            bufB.flip();

            bufB.limit(5);

            size = ch.write(new ByteBuffer[] { bufA, bufB });

            expectedEvents.add(IOEvent.createFileWriteEvent(size, tmp));

            // test force(boolean)

            ch.force(true);

            expectedEvents.add(IOEvent.createFileForceEvent(tmp));

            // reset file

            ch.position(0);

            // test read(ByteBuffer)

            bufA.clear();

            size = ch.read(bufA);

            expectedEvents.add(IOEvent.createFileReadEvent(size, tmp));

            // test read(ByteBuffer, long)

            bufA.clear();

            size = ch.read(bufA, bufA.capacity() / 2);

            expectedEvents.add(IOEvent.createFileReadEvent(size, tmp));

            // test read(ByteBuffer[])

            bufA.clear();

            bufA.limit(5);

            bufB.clear();

            bufB.limit(5);

            size = ch.read(new ByteBuffer[] { bufA, bufB });

            expectedEvents.add(IOEvent.createFileReadEvent(size, tmp));

            // Read at EOF. Should get size -1 in event.

            ch.position(ch.size());

            bufA.clear();

            size = ch.read(bufA);

            assertEquals(size, -1L, "Expected size -1 when read at EOF");

            expectedEvents.add(IOEvent.createFileReadEvent(size, tmp));

            ch.close();

            recording.stop();

            List<RecordedEvent> events = Events.fromRecording(recording);

            IOHelper.verifyEqualsInOrder(events, expectedEvents);

        }

    }

}