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

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package jdk.jfr.api.consumer.streaming;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicInteger;

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

/**
 * @test
 * @summary Verifies that it is possible to filter a stream for an event
 * @key jfr
 * @requires vm.hasJFR
 * @library /test/lib
 * @run main/othervm jdk.jfr.api.consumer.streaming.TestFiltering
 */
public class TestFiltering {

    static class SnakeEvent extends Event {
        int id;
    }

    static class EelEvent extends Event {
        int id;
    }

    public static void main(String... args) throws Exception {
        CountDownLatch l = new CountDownLatch(1);
        String eventName = SnakeEvent.class.getName();
        AtomicInteger idCounter = new AtomicInteger(-1);
        try (RecordingStream e = new RecordingStream()) {
            e.onEvent(eventName, event -> {
                if (!event.getEventType().getName().equals(eventName)) {
                    throw new InternalError("Unexpected event " + e);
                }
                if (event.getInt("id") != idCounter.incrementAndGet()) {
                    throw new InternalError("Incorrect id");
                }
                if (idCounter.get() == 99) {
                    l.countDown();
                }
            });
            e.startAsync();
            for (int i = 0; i < 100; i++) {
                SnakeEvent se = new SnakeEvent();
                se.id = i;
                se.commit();

                EelEvent ee = new EelEvent();
                ee.id = i;
                ee.commit();
            }
            l.await();
        }
    }
}