/*

 * 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.Timer;

import java.util.TimerTask;

import java.util.concurrent.atomic.AtomicBoolean;

import java.util.concurrent.atomic.AtomicInteger;

import jdk.jfr.api.consumer.recordingstream.TestUtils.TestError;

import jdk.jfr.api.consumer.recordingstream.TestUtils.TestException;

import jdk.jfr.api.consumer.security.TestStreamingRemote.TestEvent;

import jdk.jfr.consumer.RecordingStream;

/**

 * @test

 * @summary Tests RecordingStream::onError(...) when using RecordingStream:start

 * @key jfr

 * @requires vm.hasJFR

 * @library /test/lib /test/jdk

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

 */

public class TestOnErrorSync {

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

        testDefaultError();

        testCustomError();

        testDefaultException();

        testCustomException();

        testOnFlushSanity();

        testOnCloseSanity();

    }

    private static void testDefaultError() throws Exception {

        TestError error = new TestError();

        AtomicBoolean closed = new AtomicBoolean();

        Timer t = newEventEmitter();

        try (RecordingStream r = new RecordingStream()) {

            r.onEvent(e -> {

                throw error; // closes stream

            });

            r.onClose(() -> {

                closed.set(true);

            });

            try {

                r.start();

                throw new Exception("Expected TestError to be thrown");

            } catch (TestError te) {

                // as expected

            }

            if (!closed.get()) {

                throw new Exception("Expected stream to be closed");

            }

        } finally {

            t.cancel();

        }

    }

    private static void testCustomError() throws Exception {

        TestError error = new TestError();

        AtomicBoolean onError = new AtomicBoolean();

        AtomicBoolean closed = new AtomicBoolean();

        Timer t = newEventEmitter();

        try (RecordingStream r = new RecordingStream()) {

            r.onEvent(e -> {

                throw error; // closes stream

            });

            r.onError(e -> {

                onError.set(true);

            });

            r.onClose(() -> {

                closed.set(true);

            });

            try {

                r.start();

                throw new Exception("Expected TestError to be thrown");

            } catch (TestError terror) {

                // as expected

            }

            if (onError.get()) {

                throw new Exception("Expected onError(...) NOT to be invoked");

            }

            if (!closed.get()) {

                throw new Exception("Expected stream to be closed");

            }

        } finally {

            t.cancel();

        }

    }

    private static void testDefaultException() throws Exception {

        TestException exception = new TestException();

        AtomicInteger counter = new AtomicInteger();

        AtomicBoolean closed = new AtomicBoolean();

        Timer t = newEventEmitter();

        try (RecordingStream r = new RecordingStream()) {

            r.onEvent(e -> {

                if (counter.incrementAndGet() == 2) {

                    // Only close if we get a second event after an exception

                    r.close();

                    return;

                }

                TestUtils.throwUnchecked(exception);

            });

            r.onClose(() -> {

                closed.set(true);

            });

            try {

                r.start();

            } catch (Exception e) {

                throw new Exception("Unexpected exception thrown from start()", e);

            }

            if (!exception.isPrinted()) {

                throw new Exception("Expected stack trace from Exception to be printed");

            }

            if (!closed.get()) {

                throw new Exception("Expected stream to be closed");

            }

        } finally {

            t.cancel();

        }

    }

    private static void testCustomException() throws Exception {

        TestException exception = new TestException();

        AtomicInteger counter = new AtomicInteger();

        AtomicBoolean onError = new AtomicBoolean();

        AtomicBoolean closed = new AtomicBoolean();

        AtomicBoolean received = new AtomicBoolean();

        Timer t = newEventEmitter();

        try (RecordingStream r = new RecordingStream()) {

            r.onEvent(e -> {

                if (counter.incrementAndGet() == 2) {

                    // Only close if we get a second event after an exception

                    r.close();

                    return;

                }

                TestUtils.throwUnchecked(exception);

            });

            r.onError(e -> {

                received.set(e == exception);

                onError.set(true);

            });

            r.onClose(() -> {

                closed.set(true);

            });

            try {

                r.start();

            } catch (Exception e) {

                throw new Exception("Unexpected exception thrown from start()", e);

            }

            if (!received.get()) {

                throw new Exception("Did not receive expected exception in onError(...)");

            }

            if (exception.isPrinted()) {

                throw new Exception("Expected stack trace from Exception NOT to be printed");

            }

            if (!onError.get()) {

                throw new Exception("Expected OnError(...) to be invoked");

            }

            if (!closed.get()) {

                throw new Exception("Expected stream to be closed");

            }

        } finally {

            t.cancel();

        }

    }

    private static void testOnFlushSanity() throws Exception {

        TestException exception = new TestException();

        AtomicBoolean received = new AtomicBoolean();

        try (RecordingStream r = new RecordingStream()) {

            r.onFlush(() -> {

                TestUtils.throwUnchecked(exception);

            });

            r.onError(t -> {

                received.set(t == exception);

                r.close();

            });

            r.start();

            if (!received.get()) {

                throw new Exception("Expected exception in OnFlush to propagate to onError");

            }

        }

    }

    private static void testOnCloseSanity() throws Exception {

        TestException exception = new TestException();

        AtomicBoolean received = new AtomicBoolean();

        try (RecordingStream r = new RecordingStream()) {

            r.onFlush(() -> {

                r.close(); // will trigger onClose

            });

            r.onClose(() -> {

                TestUtils.throwUnchecked(exception); // will trigger onError

            });

            r.onError(t -> {

                received.set(t == exception);

            });

            r.start();

            if (!received.get()) {

                throw new Exception("Expected exception in OnFlush to propagate to onError");

            }

        }

    }

    private static Timer newEventEmitter() {

        Timer timer = new Timer();

        TimerTask task = new TimerTask() {

            @Override

            public void run() {

                TestEvent event = new TestEvent();

                event.commit();

            }

        };

        timer.schedule(task, 0, 100);

        return timer;

    }

}