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package jdk.jfr.api.consumer.streaming;

import java.time.Duration;

import java.time.Instant;

import java.util.concurrent.atomic.AtomicInteger;

import jdk.jfr.consumer.EventStream;

/**

 * @test

 * @summary Test that a stream ends/closes when an application crashes.

 * @key jfr

 * @requires vm.hasJFR

 * @library /test/lib /test/jdk

 * @modules jdk.jfr jdk.attach java.base/jdk.internal.misc

 *

 * @run main/othervm jdk.jfr.api.consumer.streaming.TestJVMCrash

 */

public class TestJVMCrash {

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

        int id = 1;

        while (true) {

            TestProcess process = new TestProcess("crash-application-" + id++);

            AtomicInteger eventCounter = new AtomicInteger();

            try (EventStream es = EventStream.openRepository(process.getRepository())) {

                // Start from first event in repository

                es.setStartTime(Instant.EPOCH);

                es.onEvent(e -> {

                    if (eventCounter.incrementAndGet() == TestProcess.NUMBER_OF_EVENTS) {

                        process.crash();

                    }

                });

                es.startAsync();

                // If crash corrupts chunk in repository, retry in 30 seconds

                es.awaitTermination(Duration.ofSeconds(30));

                if (eventCounter.get() == TestProcess.NUMBER_OF_EVENTS) {

                    return;

                }

                System.out.println("Incorrect event count. Retrying...");

            }

        }

    }

}