test/jdk/jdk/jfr/jcmd/TestJcmdStartFlushInterval.java

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package jdk.jfr.jcmd;

import java.time.Duration;

import jdk.jfr.FlightRecorder;
import jdk.jfr.Recording;

/**
 * @test
 * @summary Start a recording with a flush interval
 * @key jfr
 * @requires vm.hasJFR
 * @library /test/lib /test/jdk
 * @run main/othervm jdk.jfr.jcmd.TestJcmdStartReadOnlyFile
 */
public class TestJcmdStartFlushInterval {

    public static void main(String[] args) throws Exception {
        JcmdHelper.jcmd("JFR.start","flush-interval=1s");
        for (Recording r : FlightRecorder.getFlightRecorder().getRecordings()) {
            Duration d = r.getFlushInterval();
            if (d.equals(Duration.ofSeconds(1))) {
                return; //OK
            } else {
                throw new Exception("Unexpected flush-interval=" + d);
            }
        }
        throw new Exception("No recording found");
    }

}