test/jdk/jdk/jfr/api/consumer/streaming/TestEventRegistration.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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package jdk.jfr.api.consumer.streaming;

import java.util.concurrent.CountDownLatch;

import jdk.jfr.Event;
import jdk.jfr.FlightRecorder;
import jdk.jfr.Registered;
import jdk.jfr.consumer.RecordingStream;

/**
 * @test
 * @summary Test that it is possible to register new metadata in a chunk
 * @key jfr
 * @requires vm.hasJFR
 * @library /test/lib
 * @run main/othervm jdk.jfr.api.consumer.streaming.TestEventRegistration
 */
public class TestEventRegistration {
    @Registered(false)
    static class StreamEvent1 extends Event {
    }

    @Registered(false)
    static class StreamEvent2 extends Event {
    }

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

        CountDownLatch s1Latch = new CountDownLatch(1);
        CountDownLatch s2Latch = new CountDownLatch(1);
        try (RecordingStream es = new RecordingStream()) {
            es.onEvent(StreamEvent1.class.getName(), e -> {
                s1Latch.countDown();
            });
            es.onEvent(StreamEvent2.class.getName(), e -> {
                s2Latch.countDown();
            });
            es.startAsync();
            System.out.println("Registering " + StreamEvent1.class.getName());
            FlightRecorder.register(StreamEvent1.class);
            StreamEvent1 s1 = new StreamEvent1();
            s1.commit();
            System.out.println(StreamEvent1.class.getName() + " commited");
            System.out.println("Awaiting latch for " + StreamEvent1.class.getName());
            s1Latch.await();
            System.out.println();
            System.out.println("Registering " + StreamEvent2.class.getName());
            FlightRecorder.register(StreamEvent2.class);
            StreamEvent2 s2 = new StreamEvent2();
            s2.commit();
            System.out.println(StreamEvent2.class.getName() + " commited");
            System.out.println("Awaiting latch for " + StreamEvent2.class.getName());
            s2Latch.await();
        }
    }
}