diff -r 5fb8ececb9e6 -r 9316d02dd4a5 test/jdk/jdk/jfr/api/consumer/streaming/TestLatestEvent.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/jdk/jdk/jfr/api/consumer/streaming/TestLatestEvent.java Fri Aug 09 01:18:18 2019 +0200 @@ -0,0 +1,92 @@ +/* + * 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.Name; +import jdk.jfr.Recording; +import jdk.jfr.consumer.EventStream; +import jdk.jfr.consumer.RecordingStream; + +/** + * @test + * @summary Verifies that a stream from a repository starts at the latest event + * @key jfr + * @requires vm.hasJFR + * @library /test/lib + * @run main/othervm jdk.jfr.api.consumer.streaming.TestLatestEvent + */ +public class TestLatestEvent { + + @Name("Chunk") + static class ChunkEvent extends Event { + boolean end; + } + + public static void main(String... args) throws Exception { + try (RecordingStream r = new RecordingStream()) { + r.startAsync(); + // Create chunks with events in the repository + for (int i = 0; i < 5; i++) { + try (Recording r1 = new Recording()) { + r1.start(); + ChunkEvent e = new ChunkEvent(); + e.end = false; + e.commit(); + r1.stop(); + } + } + CountDownLatch endEventRecevied = new CountDownLatch(1); + CountDownLatch emitEvent = new CountDownLatch(1); + try (EventStream s = EventStream.openRepository()) { + s.onEvent("Chunk", e -> { + if (e.getBoolean("end")) { + endEventRecevied.countDown(); + return; + } + System.out.println("Stream should start at latest event:"); + System.out.println(e); + }); + + ChunkEvent e1 = new ChunkEvent(); + e1.end = false; + e1.commit(); + s.startAsync(); + s.onFlush(() -> { + emitEvent.countDown(); + }); + emitEvent.await(); + ChunkEvent e2 = new ChunkEvent(); + e2.end = true; + e2.commit(); + + endEventRecevied.await(); + } + } + } +}