--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/jdk/jfr/event/runtime/TestFlush.java Wed Oct 30 19:43:52 2019 +0100
@@ -0,0 +1,166 @@
+/*
+ * 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.event.runtime;
+
+import java.util.concurrent.CountDownLatch;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import jdk.jfr.Event;
+import jdk.jfr.FlightRecorder;
+import jdk.jfr.Period;
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.RecordingStream;
+import jdk.jfr.consumer.RecordedEvent;
+
+import jdk.test.lib.Asserts;
+import jdk.test.lib.jfr.EventNames;
+
+/**
+ * @test
+ * @summary Verifies at the metalevel that stream contents are written to ongoing recordings
+ * @key jfr
+ * @requires vm.hasJFR
+ * @library /test/lib
+ * @run main/othervm -Xlog:jfr+system+streaming=trace jdk.jfr.event.runtime.TestFlush
+ */
+public class TestFlush {
+ private static boolean flushEventAck = false;
+
+ @Period("2 s")
+ static class ZebraEvent extends Event {
+ }
+ static class CatEvent extends Event {
+ }
+ static class DogEvent extends Event {
+ }
+ static class MouseEvent extends Event {
+ }
+
+ public static void main(String... args) throws InterruptedException {
+ CountDownLatch dogLatch = new CountDownLatch(1);
+ CountDownLatch catLatch = new CountDownLatch(1);
+ CountDownLatch mouseLatch = new CountDownLatch(1);
+ CountDownLatch zebraLatch = new CountDownLatch(3);
+
+ FlightRecorder.addPeriodicEvent(ZebraEvent.class, () -> {
+ ZebraEvent ze = new ZebraEvent();
+ ze.commit();
+ });
+
+ try (RecordingStream rs = new RecordingStream()) {
+ rs.enable(EventNames.Flush);
+ rs.enable(EventNames.FlushStorage);
+ rs.enable(EventNames.FlushStacktrace);
+ rs.enable(EventNames.FlushStringPool);
+ rs.enable(EventNames.FlushMetadata);
+ rs.enable(EventNames.FlushTypeSet);
+ rs.onEvent(e -> {
+ switch (e.getEventType().getName()) {
+ case EventNames.Flush:
+ flushEventAck = true;
+ case EventNames.FlushStorage:
+ case EventNames.FlushStacktrace:
+ case EventNames.FlushStringPool:
+ case EventNames.FlushMetadata:
+ case EventNames.FlushTypeSet:
+ validateFlushEvent(e);
+ return;
+ }
+ if (e.getEventType().getName().equals(CatEvent.class.getName())) {
+ System.out.println("Found cat!");
+ catLatch.countDown();
+ return;
+ }
+ if (e.getEventType().getName().equals(DogEvent.class.getName())) {
+ System.out.println("Found dog!");
+ dogLatch.countDown();
+ return;
+ }
+ if (e.getEventType().getName().equals(ZebraEvent.class.getName())) {
+ System.out.println("Found zebra!");
+ zebraLatch.countDown();
+ return;
+ }
+ if (e.getEventType().getName().equals(MouseEvent.class.getName())) {
+ System.out.println("Found mouse!");
+ mouseLatch.countDown();
+ return;
+ }
+ System.out.println("Unexpected event: " + e.getEventType().getName());
+ });
+
+ rs.startAsync();
+
+ try (Recording r1 = new Recording()) {
+ r1.start();
+ MouseEvent me = new MouseEvent();
+ me.commit();
+ System.out.println("Mouse emitted");
+ mouseLatch.await();
+ try (Recording r2 = new Recording()) { // force chunk rotation in stream
+ r2.start();
+ DogEvent de = new DogEvent();
+ de.commit();
+ System.out.println("Dog emitted");
+ dogLatch.await();
+ CatEvent ce = new CatEvent();
+ ce.commit();
+ System.out.println("Cat emitted");
+ catLatch.await();
+ zebraLatch.await();
+ acknowledgeFlushEvent();
+ }
+ }
+ }
+ }
+
+ private static void printEvent(RecordedEvent re) {
+ System.out.println(re.getEventType().getName());
+ System.out.println(re.getStartTime().toEpochMilli());
+ System.out.println(re.getEndTime().toEpochMilli());
+ }
+
+ private static void printFlushEvent(RecordedEvent re) {
+ printEvent(re);
+ System.out.println("flushID: " + (long) re.getValue("flushId"));
+ System.out.println("elements: " + (long) re.getValue("elements"));
+ System.out.println("size: " + (long) re.getValue("size"));
+ }
+
+ private static void validateFlushEvent(RecordedEvent re) {
+ printFlushEvent(re);
+ Asserts.assertTrue(re.getEventType().getName().contains("Flush"), "invalid Event type");
+ Asserts.assertGT((long) re.getValue("flushId"), 0L, "Invalid flush ID");
+ Asserts.assertGT((long) re.getValue("elements"), 0L, "No elements");
+ Asserts.assertGT((long) re.getValue("size"), 0L, "Empty size");
+ }
+
+ private static void acknowledgeFlushEvent() {
+ Asserts.assertTrue(flushEventAck, "No Flush event");
+ }
+}