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/*
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* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.jfr.api.consumer.filestream;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.time.Instant;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.concurrent.CyclicBarrier;
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import java.util.concurrent.atomic.AtomicBoolean;
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import java.util.concurrent.atomic.AtomicReference;
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import jdk.jfr.Event;
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import jdk.jfr.Recording;
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import jdk.jfr.consumer.EventStream;
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/**
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* @test
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* @summary Test EventStream::setOrdered(...)
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* @key jfr
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* @requires vm.hasJFR
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* @library /test/lib
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* @run main/othervm jdk.jfr.api.consumer.filestream.TestOrdered
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*/
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public class TestOrdered {
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static class OrderedEvent extends Event {
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}
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static class Emitter extends Thread {
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private final CyclicBarrier barrier;
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public Emitter(CyclicBarrier barrier) {
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this.barrier = barrier;
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}
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@Override
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public void run() {
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OrderedEvent e1 = new OrderedEvent();
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e1.commit();
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try {
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barrier.await();
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} catch (Exception e) {
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e.printStackTrace();
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throw new Error("Unexpected exception in barrier");
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}
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OrderedEvent e2 = new OrderedEvent();
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e2.commit();
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}
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}
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private static final int THREAD_COUNT = 4;
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private static final boolean[] BOOLEAN_STATES = { false, true };
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public static void main(String... args) throws Exception {
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Path p = makeUnorderedRecording();
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testSetOrderedTrue(p);
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testSetOrderedFalse(p);
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}
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private static void testSetOrderedTrue(Path p) throws Exception {
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for (boolean reuse : BOOLEAN_STATES) {
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AtomicReference<Instant> timestamp = new AtomicReference<>(Instant.MIN);
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try (EventStream es = EventStream.openFile(p)) {
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es.setReuse(reuse);
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es.setOrdered(true);
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es.onEvent(e -> {
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Instant endTime = e.getEndTime();
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if (endTime.isBefore(timestamp.get())) {
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throw new Error("Events are not ordered! Reuse = " + reuse);
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}
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timestamp.set(endTime);
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});
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es.start();
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}
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}
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}
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private static void testSetOrderedFalse(Path p) throws Exception {
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for (boolean reuse : BOOLEAN_STATES) {
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AtomicReference<Instant> timestamp = new AtomicReference<>(Instant.MIN);
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AtomicBoolean unoreded = new AtomicBoolean(false);
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try (EventStream es = EventStream.openFile(p)) {
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es.setReuse(reuse);
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es.setOrdered(false);
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es.onEvent(e -> {
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Instant endTime = e.getEndTime();
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if (endTime.isBefore(timestamp.get())) {
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unoreded.set(true);
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es.close();
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}
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timestamp.set(endTime);
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});
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es.start();
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if (!unoreded.get()) {
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throw new Exception("Expected at least some events to be out of order! Reuse = " + reuse);
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}
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}
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}
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}
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private static Path makeUnorderedRecording() throws Exception {
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CyclicBarrier barrier = new CyclicBarrier(THREAD_COUNT + 1);
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try (Recording r = new Recording()) {
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r.start();
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List<Emitter> emitters = new ArrayList<>();
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for (int i = 0; i < THREAD_COUNT; i++) {
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Emitter e = new Emitter(barrier);
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e.start();
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emitters.add(e);
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}
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// Thread buffers should now have one event each
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barrier.await();
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// Add another event to each thread buffer, so
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// events are bound to come out of order when they
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// are flushed
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for (Emitter e : emitters) {
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e.join();
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}
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r.stop();
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Path p = Files.createTempFile("recording", ".jfr");
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r.dump(p);
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return p;
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}
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}
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}
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