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TestChunkGap.java
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TestChunkGap.java
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/*
* 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.streaming;
import java.time.Instant;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicInteger;
import jdk.jfr.Event;
import jdk.jfr.Recording;
import jdk.jfr.consumer.EventStream;
/**
* @test
* @summary Tests that a stream can gracefully handle chunk being removed in the
* middle
* @key jfr
* @requires vm.hasJFR
* @library /test/lib
* @run main/othervm jdk.jfr.api.consumer.streaming.TestChunkGap
*/
public class TestChunkGap {
static class StartEvent extends Event {
}
static class TestGapEvent extends Event {
}
static class EndEvent extends Event {
}
private final static AtomicInteger count = new AtomicInteger(0);
public static void main(String... args) throws Exception {
CountDownLatch gap = new CountDownLatch(1);
CountDownLatch receivedEvent = new CountDownLatch(1);
try (EventStream s = EventStream.openRepository()) {
try (Recording r1 = new Recording()) {
s.setStartTime(Instant.EPOCH);
s.onEvent(e -> {
System.out.println(e);
receivedEvent.countDown();
try {
gap.await();
} catch (InterruptedException e1) {
e1.printStackTrace();
}
count.incrementAndGet();
if (e.getEventType().getName().equals(EndEvent.class.getName())) {
s.close();
}
});
s.startAsync();
r1.start();
StartEvent event1 = new StartEvent();
event1.commit();
receivedEvent.await();
r1.stop();
// create chunk that is removed
try (Recording r2 = new Recording()) {
r2.enable(TestGapEvent.class);
r2.start();
TestGapEvent event2 = new TestGapEvent();
event2.commit();
r2.stop();
}
gap.countDown();
try (Recording r3 = new Recording()) {
r3.enable(EndEvent.class);
r3.start();
EndEvent event3 = new EndEvent();
event3.commit();
r3.stop();
s.awaitTermination();
if (count.get() != 2) {
throw new AssertionError("Expected 2 event, but got " + count);
}
}
}
}
}
}