TestOutOfProcessMigration.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * 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.nio.file.Path;
import java.nio.file.Paths;
import java.time.Instant;
import java.util.concurrent.atomic.AtomicInteger;

import jdk.jfr.consumer.EventStream;
import jdk.test.lib.dcmd.CommandExecutor;
import jdk.test.lib.dcmd.PidJcmdExecutor;

/**
 * @test
 * @summary Verifies that a out-of-process stream is closed when the repository
 *          is changed.
 * @key jfr
 * @library /lib /
 * @modules jdk.jfr jdk.attach java.base/jdk.internal.misc
 * @run main/othervm jdk.jfr.api.consumer.streaming.TestOutOfProcessMigration
 */
public class TestOutOfProcessMigration {
    public static void main(String... args) throws Exception {
        try (TestProcess process = new TestProcess("application"))  {
            AtomicInteger eventCounter = new AtomicInteger();
            Path newRepo = Paths.get("new-repository").toAbsolutePath();
            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) {
                        System.out.println("Changing repository to " + newRepo + " ...");
                        CommandExecutor executor = new PidJcmdExecutor(String.valueOf(process.pid()));
                        // This should close stream
                        executor.execute("JFR.configure repositorypath=" + newRepo);
                    }
                });
                es.start();
                process.exit();
                // Wait for process to die, so files are cleaned up
                process.awaitDeath();
            }
        }
    }
}