--- /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();
+ }
+ }
+ }
+}