test/jdk/jdk/jfr/api/recording/time/TestSetFlushInterval.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
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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.recording.time;

import java.time.Duration;
import java.util.concurrent.CountDownLatch;

import jdk.jfr.Recording;
import jdk.jfr.consumer.EventStream;
import jdk.test.lib.Asserts;

/**
 * @test
 * @key jfr
 * @summary Test Recording::SetFlushInterval(...) and
 *          Recording::getFlushInterval()
 * @requires vm.hasJFR
 * @library /test/lib
 * @run main/othervm jdk.jfr.api.recording.time.TestSetFlushInterval
 */

public class TestSetFlushInterval {

    public static void main(String[] args) throws Throwable {
        testSetGet();
        testSetNull();
        testFlush();
    }

    static void testFlush() throws Exception {
        CountDownLatch flush = new CountDownLatch(1);
        try (EventStream es = EventStream.openRepository()) {
            es.onFlush(() -> {
                flush.countDown();
            });
            es.startAsync();
            try (Recording r = new Recording()) {
                r.setFlushInterval(Duration.ofSeconds(1));
                r.start();
                flush.await();
            }
        }
    }

    static void testSetNull() {
        try (Recording r = new Recording()) {
            r.setFlushInterval(null);
            Asserts.fail("Expected NullPointerException");
        } catch (NullPointerException npe) {
            // as expected
        }
    }

    static void testSetGet() {
        try (Recording r = new Recording()) {
            Duration a = Duration.ofNanos(21378461289374646L);
            r.setFlushInterval(a);
            Duration b = r.getFlushInterval();
            Asserts.assertEQ(a, b);
        }
    }

}