/*

 * Copyright (c) 2018, 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

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package jdk.jfr.event.io;

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

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.ServerSocket;

import java.net.Socket;

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;

import jdk.test.lib.thread.TestThread;

import jdk.test.lib.thread.XRun;

/*

 * @test

 * @key jfr

 * @library /test/lib /test/jdk

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

 */

public class TestSocketEvents {

    private static final int writeInt = 'A';

    private static final byte[] writeBuf = { 'B', 'C', 'D', 'E' };

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

    private synchronized void addExpectedEvent(IOEvent event) {

        expectedEvents.add(event);

    }

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

        new TestSocketEvents().test();

    }

    private void test() throws Throwable {

        Recording recording = new Recording();

        try (ServerSocket ss = new ServerSocket()) {

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

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

            recording.start();

            ss.setReuseAddress(true);

            ss.bind(null);

            TestThread readerThread = new TestThread(new XRun() {

                @Override

                public void xrun() throws IOException {

                    byte[] bs = new byte[4];

                    try (Socket s = ss.accept(); InputStream is = s.getInputStream()) {

                        int readInt = is.read();

                        assertEquals(readInt, writeInt, "Wrong readInt");

                        addExpectedEvent(IOEvent.createSocketReadEvent(1, s));

                        int bytesRead = is.read(bs, 0, 3);

                        assertEquals(bytesRead, 3, "Wrong bytesRead partial buffer");

                        addExpectedEvent(IOEvent.createSocketReadEvent(bytesRead, s));

                        bytesRead = is.read(bs);

                        assertEquals(bytesRead, writeBuf.length, "Wrong bytesRead full buffer");

                        addExpectedEvent(IOEvent.createSocketReadEvent(bytesRead, s));

                        // Try to read more, but writer have closed. Should get EOF.

                        readInt = is.read();

                        assertEquals(readInt, -1, "Wrong readInt at EOF");

                        addExpectedEvent(IOEvent.createSocketReadEvent(-1, s));

                   }

                }

            });

            readerThread.start();

            try (Socket s = new Socket()) {

                s.connect(ss.getLocalSocketAddress());

                try (OutputStream os = s.getOutputStream()) {

                    os.write(writeInt);

                    addExpectedEvent(IOEvent.createSocketWriteEvent(1, s));

                    os.write(writeBuf, 0, 3);

                    addExpectedEvent(IOEvent.createSocketWriteEvent(3, s));

                    os.write(writeBuf);

                    addExpectedEvent(IOEvent.createSocketWriteEvent(writeBuf.length, s));

                }

            }

            readerThread.joinAndThrow();

            recording.stop();

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

            IOHelper.verifyEquals(events, expectedEvents);

        }

    }

}