diff -r 2c3cc4b01880 -r c16ac7a2eba4 test/jdk/jdk/jfr/api/consumer/streaming/TestEmptyChunks.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/jdk/jdk/jfr/api/consumer/streaming/TestEmptyChunks.java Wed Oct 30 19:43:52 2019 +0100 @@ -0,0 +1,84 @@ +/* + * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * 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). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package jdk.jfr.api.consumer.streaming; + +import java.util.concurrent.CountDownLatch; + +import jdk.jfr.Event; +import jdk.jfr.Recording; +import jdk.jfr.consumer.RecordingStream; + +/** + * @test + * @summary Test that it is possible to iterate over chunk without normal events + * @key jfr + * @requires vm.hasJFR + * @library /test/lib + * @run main/othervm jdk.jfr.api.consumer.streaming.TestEmptyChunks + */ +public class TestEmptyChunks { + static class EndEvent extends Event { + } + + public static void main(String... args) throws Exception { + CountDownLatch end = new CountDownLatch(1); + CountDownLatch firstFlush = new CountDownLatch(1); + try (RecordingStream es = new RecordingStream()) { + es.onEvent(EndEvent.class.getName(), e -> { + end.countDown(); + }); + es.onFlush(() -> { + firstFlush.countDown(); + }); + es.startAsync(); + System.out.println("Invoked startAsync()"); + // Wait for stream thread to start + firstFlush.await(); + System.out.println("Stream thread active"); + Recording r1 = new Recording(); + r1.start(); + System.out.println("Chunk 1 started"); + Recording r2 = new Recording(); + r2.start(); + System.out.println("Chunk 2 started"); + Recording r3 = new Recording(); + r3.start(); + System.out.println("Chunk 3 started"); + r2.stop(); + System.out.println("Chunk 4 started"); + r3.stop(); + System.out.println("Chunk 5 started"); + EndEvent e = new EndEvent(); + e.commit(); + end.await(); + r1.stop(); + System.out.println("Chunk 5 ended"); + r1.close(); + r2.close(); + r3.close(); + } + } +}